CN217468325U

CN217468325U - Overload release device for circuit breaker

Info

Publication number: CN217468325U
Application number: CN202221377723.XU
Authority: CN
Inventors: 赵诗言; 张帅涛; 刘一丁
Original assignee: Henan Wistar Electric Co ltd
Current assignee: Henan Wistar Electric Co ltd
Priority date: 2022-06-01
Filing date: 2022-06-01
Publication date: 2022-09-20
Anticipated expiration: 2032-06-01

Abstract

The utility model discloses an overload release for circuit breaker, concretely relates to circuit breaker overload release technical field, the power distribution box comprises a box body, the inside overload release mechanism that is provided with of box, overload release mechanism includes the current conducting plate, the current conducting plate sets up inside the box, current conducting plate one side is connected with the circuit line, the current conducting plate opposite side is provided with electrically conductive switch board, the inside magnet that is provided with of electrically conductive switch board. The utility model discloses a set up overload release mechanism and buffer gear, can carry out automatic cutout circuit when the circuit transships, improve safe effect, can make the electrically conductive switch board bounce open in the twinkling of an eye through electro-magnet and magnet simultaneously, improve cut-off speed, avoid the circuit part because the overload time is long to produce and damages, can cushion the switch of electrically conductive switch board at every turn simultaneously, prevent electrically conductive switch board striking internals, lead to the part to damage.

Description

Overload release device for circuit breaker

Technical Field

The utility model relates to a circuit breaker overload release technical field, more specifically say, the utility model relates to a circuit breaker is with overload release.

Background

The circuit breaker is a switching device capable of closing, carrying and opening a current under a normal circuit condition and closing, carrying and opening a current under an abnormal circuit condition within a prescribed time, and can be used for distributing electric energy, not frequently starting an asynchronous motor, protecting a power supply line, a motor and the like, automatically cutting off a circuit when a fault such as severe overload or short circuit or undervoltage occurs, and the like, and functions as a combination of a fuse type switch and an over-and-under-heat relay and the like. Furthermore, no parts need to be changed after breaking the fault current. Have achieved wide application.

At present, when a circuit breaker is in severe overload or short circuit, the circuit breaker is bent at high temperature through a bimetallic element, and then the circuit breaker is triggered to trip to cut off an overload circuit, so that the circuit cutting-off speed is low, the circuit part is influenced by long-time overload, and meanwhile, the circuit breaker rebounds to generate impact on the inside of the circuit breaker at every time, so that the part is easy to damage.

SUMMERY OF THE UTILITY MODEL

In order to overcome prior art's above-mentioned defect, the embodiment of the utility model provides an overload release device for circuit breaker, through setting up overload release mechanism and buffer gear, can carry out automatic cutout circuit when the circuit transships, improve the safety effect, can make the electrically conductive switch board pop open in the twinkling of an eye through electro-magnet and magnet simultaneously, improve the cut-off speed, avoid the circuit part because the long production of overload time damages, can cushion the switch of electrically conductive switch board at every turn simultaneously, prevent electrically conductive switch board striking internals, lead to the part to damage, with the problem of proposing in solving above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: an overload release device for a circuit breaker comprises a box body, wherein an overload release mechanism is arranged in the box body;

the overload releasing mechanism comprises a conductive plate, the conductive plate is arranged in a box body, one side of the conductive plate is connected with a circuit line, the other side of the conductive plate is provided with a conductive switch plate, a magnet is arranged in the conductive switch plate, one side of the conductive switch plate is connected with a telescopic circuit line, and the other side of the conductive switch plate is provided with an electromagnet;

the electromagnet is installed on the rear side of the inner wall of the box body, a current transformer is installed on one side of the inner wall of the box body, a control main board is installed at the bottom of the current transformer, and a buffer mechanism is arranged between the electromagnet and the conductive switch board.

In a preferred embodiment, the buffer mechanism comprises two fixed boxes, the fixed boxes are respectively arranged at the top and the bottom of the electromagnet, a spring is arranged on one side of the inner wall of each fixed box, a moving plate is arranged on one side of the spring, and a sliding rod is arranged on one side of the moving plate.

In a preferred embodiment, the moving plate is connected with the inner wall of the fixed box in a sliding mode, one end of the sliding rod penetrates through the fixed box and extends to one side, and one end of the sliding rod is provided with a buffer pad.

In a preferred embodiment, a limiting mechanism is arranged at the bottom of the conductive switch board, the limiting mechanism includes a sliding sleeve, the sliding sleeve is arranged at the bottom of the conductive switch board, a limiting sliding rod is arranged inside the sliding sleeve, and a through sliding groove is formed in the surface of the bottom of the box body.

In a preferred embodiment, the sliding sleeve is connected with the limiting sliding rod in a sliding mode, two ends of the limiting sliding rod are fixedly connected with the inner wall of the box body, a connecting rod is arranged at the bottom of the sliding sleeve, and the connecting rod is connected with the through sliding groove in a sliding mode.

In a preferred embodiment, the bottom of the connecting rod penetrates through the box body and extends to the bottom of the box body, and the bottom of the connecting rod is provided with a manual switch.

In a preferred embodiment, the top surface of the inner wall of the box body is provided with a limiting groove, the top of the conductive switch plate is provided with a limiting rod, the top of the limiting rod is provided with a ball, and the ball is connected with the limiting groove in a sliding manner.

The utility model discloses a technological effect and advantage:

1. by arranging the overload release mechanism and the buffer mechanism, the overcurrent transformer detects the current flowing through the circuit line, the current transformer transmits the detected current signal to the control mainboard, when the overload occurs due to large current, the control mainboard can electrify the electromagnet, so that the electromagnet generates magnetic force, and the electromagnet and the magnet repel each other, so that the conductive switch plate is ejected to one side through repulsive force, so that the conductive plate and the conductive switch plate are separated, thereby cutting off the circuit, the circuit is automatically cut off when being overloaded, the impact force generated when the magnet and the conductive switch plate move is buffered through the repulsive force of the spring, compared with the prior art, the circuit can be automatically cut off when the circuit is overloaded, the safety effect is improved, meanwhile, the conductive switch plate can be instantly ejected through the electromagnet and the magnet, the cutting off speed is improved, and the circuit parts are prevented from being damaged due to long overload time, meanwhile, the switch of the conductive switch board can be buffered every time, and the conductive switch board is prevented from impacting internal parts to cause damage to the parts;

2. through setting up stop gear, slide at spacing slide bar surface through the sliding sleeve, the connecting rod is running through spout surface sliding simultaneously, stability when electrically conductive switch board removes can carry out manual control to electrically conductive switch board's intercommunication simultaneously through manual switch and connecting rod, avoids controlling the mainboard and damages unable closing or opening the circuit, and the ball is at spacing groove surface sliding simultaneously, stability when further improving electrically conductive switch board and removing.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

Fig. 2 is a schematic view of the bottom structure of the conductive switch plate of the present invention.

Fig. 3 is an enlarged schematic structural diagram of a in fig. 1 according to the present invention.

Fig. 4 is an enlarged schematic structural diagram of the position B in fig. 1 according to the present invention.

The reference signs are: 1. a box body; 2. a magnet; 3. a conductive plate; 4. a circuit line; 5. a conductive switch plate; 6. a telescopic circuit line; 7. an electromagnet; 8. a current transformer; 9. a control main board; 10. a fixing box; 11. a spring; 12. moving the plate; 13. a slide bar; 14. a cushion pad; 15. a sliding sleeve; 16. a limiting slide bar; 17. run through the chute; 18. a connecting rod; 19. a manual switch; 20. a limiting groove; 21. a limiting rod; 22. and a ball.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

The overload release device for the circuit breaker shown in the attached figures 1-4 comprises a box body 1, wherein an overload release mechanism is arranged in the box body 1;

the overload releasing mechanism comprises a conductive plate 3, the conductive plate 3 is arranged in a box body 1, one side of the conductive plate 3 is connected with a circuit line 4, the other side of the conductive plate 3 is provided with a conductive switch plate 5, a magnet 2 is arranged in the conductive switch plate 5, one side of the conductive switch plate 5 is connected with a telescopic circuit line 6, and the other side of the conductive switch plate 5 is provided with an electromagnet 7;

the electromagnet 7 is installed on the rear side of the inner wall of the box body 1, the current transformer 8 is installed on one side of the inner wall of the box body 1, the control main board 9 is installed at the bottom of the current transformer 8, and a buffer mechanism is arranged between the electromagnet 7 and the conductive switch board 5.

As shown in fig. 1 and 3, the buffering mechanism includes two fixed boxes 10, the fixed boxes 10 on two sides are respectively installed at the top and the bottom of the electromagnet 7, a spring 11 is arranged on one side of the inner wall of the fixed box 10, a moving plate 12 is arranged on one side of the spring 11, a sliding rod 13 is arranged on one side of the moving plate 12, the moving plate 12 is slidably connected with the inner wall of the fixed box 10, one end of the sliding rod 13 penetrates through the fixed box 10 and extends to one side, and a buffering pad 14 is arranged at one end of the sliding rod 13, so that the buffering effect on the conductive switch board 5 is improved.

As shown in the attached figures 1, 2 and 4, the bottom of the conductive switch board 5 is provided with a limiting mechanism, the limiting mechanism comprises a sliding sleeve 15, the sliding sleeve 15 is arranged at the bottom of the conductive switch board 5, a limiting slide bar 16 is arranged inside the sliding sleeve 15, the bottom surface of the box body 1 is provided with a through slide groove 17, the sliding sleeve 15 is in sliding connection with the limiting slide bar 16, both ends of the limiting slide bar 16 are fixedly connected with the inner wall of the box body 1, the bottom of the sliding sleeve 15 is provided with a connecting rod 18, the connecting rod 18 is in sliding connection with the through slide groove 17, the bottom of the connecting rod 18 penetrates through the box body 1 and extends to the bottom of the box body 1, the bottom of the connecting rod 18 is provided with a manual switch 19, the top surface of the inner wall of the box body 1 is provided with a limiting groove 20, the top of the conductive switch board 5 is provided with a limiting rod 21, the top of the limiting rod 21 is provided with a ball 22, the ball 22 is in sliding connection with the limiting groove 20, so as to facilitate the manual control of the conductive switch board 5, the stability of the conductive switch plate 5 when moving is improved.

The utility model discloses the theory of operation: the utility model discloses in the use, at first when the circuit breaker is in connected state, the electric current loops through flexible circuit line 6, electrically conductive switch board 5 and current conducting plate 3 enter into circuit line 4, detect the electric current size that flows through circuit line 4 through current transformer 8, current transformer 8 will detect the electric current size signal transmission to control mainboard 9 in, when the electric current is great, control mainboard 9 can give electro-magnet 7 circular telegram, thereby make electro-magnet 7 produce magnetic force, and electro-magnet 7 and magnet 2 repel each other, thereby make electrically conductive switch board 5 pop out to one side through the repulsion force, thereby make current conducting plate 3 and electrically conductive switch board 5 separate, thereby the circuit is cut off, automatic cutout when the circuit overloads;

when electrically conductive switch panel 5 and conductive plate 3 switch-on, magnet 2 can strike blotter 14, drive slide bar 13 and movable plate 12 through blotter 14 and remove to make the compression of spring 11, the resilience force through spring 11 cushions magnet 2 and the impact force when electrically conductive switch panel 5 removes, effectively plays the protection effect to electrically conductive switch panel 5, magnet 2 and electro-magnet 7, electrically conductive switch panel 5 is to the damage of part when preventing overload release or intercommunication.

The points to be finally explained are: first, in the description of the present application, it should be noted that, unless otherwise specified and limited, the terms "mounted," "connected," and "connected" should be understood broadly, and may be a mechanical connection or an electrical connection, or a communication between two elements, and may be a direct connection, and "upper," "lower," "left," and "right" are only used to indicate a relative positional relationship, and when the absolute position of the object to be described is changed, the relative positional relationship may be changed;

secondly, the method comprises the following steps: in the drawings of the disclosed embodiments of the present invention, only the structures related to the disclosed embodiments are referred to, and other structures can refer to the common design, and under the condition of no conflict, the same embodiment and different embodiments of the present invention can be combined with each other;

and finally: the above description is only for the preferred embodiment of the present invention and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An overload release device for a circuit breaker comprises a box body (1), and is characterized in that: an overload release mechanism is arranged in the box body (1);

the overload releasing mechanism comprises a conductive plate (3), the conductive plate (3) is arranged in a box body (1), one side of the conductive plate (3) is connected with a circuit line (4), the other side of the conductive plate (3) is provided with a conductive switch plate (5), a magnet (2) is arranged in the conductive switch plate (5), one side of the conductive switch plate (5) is connected with a telescopic circuit line (6), and the other side of the conductive switch plate (5) is provided with an electromagnet (7);

electromagnet (7) are installed at box (1) inner wall rear side, current transformer (8) are installed to box (1) inner wall one side, control mainboard (9) are installed to current transformer (8) bottom, be provided with buffer gear between electromagnet (7) and electrically conductive switch board (5).

2. The overload release apparatus for a circuit breaker according to claim 1, wherein: buffer gear is including fixed box (10), the quantity of fixed box (10) sets up to two, both sides fixed box (10) are installed respectively in electro-magnet (7) top and bottom, fixed box (10) inner wall one side is provided with spring (11), spring (11) one side is provided with movable plate (12), movable plate (12) one side is provided with slide bar (13).

3. The overload release apparatus for a circuit breaker according to claim 2, wherein: the movable plate (12) is connected with the inner wall of the fixed box (10) in a sliding mode, one end of the sliding rod (13) penetrates through the fixed box (10) and extends to one side, and a buffering pad (14) is arranged at one end of the sliding rod (13).

4. The overload release apparatus for a circuit breaker according to claim 1, wherein: the bottom of the conductive switch board (5) is provided with a limiting mechanism, the limiting mechanism comprises a sliding sleeve (15), the sliding sleeve (15) is arranged at the bottom of the conductive switch board (5), a limiting sliding rod (16) is arranged inside the sliding sleeve (15), and a through sliding groove (17) is formed in the surface of the bottom of the box body (1).

5. The overload release apparatus for a circuit breaker according to claim 4, wherein: sliding connection between sliding sleeve (15) and limiting slide bar (16), limiting slide bar (16) both ends all with box (1) inner wall fixed connection, sliding sleeve (15) bottom is provided with connecting rod (18), connecting rod (18) and run through sliding connection between spout (17).

6. The overload release apparatus for a circuit breaker according to claim 5, wherein: the bottom of the connecting rod (18) penetrates through the box body (1) and extends to the bottom of the box body (1), and a manual switch (19) is arranged at the bottom of the connecting rod (18).

7. The overload release apparatus for a circuit breaker according to claim 1, wherein: spacing groove (20) have been seted up on box (1) inner wall top surface, conducting switch board (5) top is provided with gag lever post (21), gag lever post (21) top is provided with ball (22), sliding connection between ball (22) and spacing groove (20).