CN217740458U - Overload protection mechanism of circuit breaker - Google Patents

Abstract

The utility model discloses an overload protection mechanism of circuit breaker, including the circuit breaker casing, be provided with overload protection mechanism in the circuit breaker casing, overload protection mechanism includes connecting plate one and connecting plate two of metal material, set up the fly leaf between connecting plate one and the connecting plate two, the bottom of fly leaf is installed electromagnet assembly one, the inner chamber of circuit breaker casing is located the below of electromagnet assembly one and is provided with magnet one, the upper end of cutting off the picture peg is installed magnet two, install electromagnet assembly two with magnet two relative position on the fly leaf; the utility model discloses the great electric current enters into an electromagnet assembly and makes its production and bottom magnet the same magnetism, and fly leaf and connecting plate two formation open circuit, accomplish the purpose of instantaneous outage, drive and cut off the picture peg and remove and insert the clearance between fly leaf and the connecting plate two, form the condition that opens circuit that lasts, avoid appearing the condition that the circuit switched on under the non-artificial condition.

Description

Overload protection mechanism of circuit breaker

Technical Field

The utility model relates to a circuit breaker technical field, in particular to overload protection mechanism of circuit breaker.

Background

The breaker is a switching device which can close, bear and break the current under the condition of a normal loop and can close, bear and break the current under the condition of an abnormal loop within a specified time, the breaker is divided into a high-voltage breaker and a low-voltage breaker according to the using range of the breaker, the breaker can be used for distributing electric energy, an asynchronous motor is not frequently started, a power supply circuit, the motor and the like are protected, the circuit can be automatically cut off when the breaker has serious overload or short circuit, undervoltage and other faults, the function of the breaker is equivalent to the combination of a fuse type switch, an over-under-heat relay and the like, the traditional breaker overload protection mechanism is generally of a bimetallic strip structure, the tripping of the breaker is realized by bending bimetallic strips with different expansion coefficients, and because the bimetallic strips have certain time when being heated and deformed, the tripping is not timely, the potential safety hazard exists, and the use experience is influenced.

SUMMERY OF THE UTILITY MODEL

A primary object of the present invention is to provide an overload protection mechanism for a circuit breaker, which can effectively solve the problems of the prior art.

In order to achieve the above purpose, the utility model adopts the technical proposal that: the utility model provides an overload protection mechanism of circuit breaker, includes the circuit breaker casing, be provided with overload protection mechanism in the circuit breaker casing, overload protection mechanism includes the connecting plate one and the connecting plate two of metal material, the fly leaf has been set up between connecting plate one and the connecting plate two, electromagnet assembly one is installed to the bottom of fly leaf, the below that the inner chamber of circuit breaker casing is located electromagnet assembly one is provided with magnet one, sliding connection has the wall picture peg on the connecting plate two, cut off the upper end of picture peg and install magnet two, install electromagnet assembly two with magnet two relative position on the fly leaf.

Preferably, one end of the movable plate is vertically and slidably connected with the first connecting plate through a guide rod, and the guide rod is made of metal.

Preferably, the number of the guide rods is two, and each guide rod is sleeved with a support spring.

Preferably, the first electromagnet assembly and the first magnet are located on the same vertical plane, and the second electromagnet assembly and the second magnet are located on the same horizontal plane.

Preferably, the electromagnet assembly I comprises an insulation connecting block I and an electromagnet I, the electromagnet I is connected with the movable plate through the insulation connecting block I, two resistance columns I are embedded in the insulation connecting block I, and the movable plate is connected with a wiring end of the electromagnet I through the two resistance columns I.

Preferably, the electromagnet assembly II comprises an insulating connecting block II and an electromagnet II, the electromagnet II is connected with the movable plate through the insulating connecting block II, two resistance columns II are embedded in the insulating connecting block II, and the movable plate is connected with the wiring end of the electromagnet II through the two resistance columns II.

Preferably, the partition inserting plate is of an L-shaped structure, and the outer side of the upper end of the partition inserting plate is transversely inserted into the outer side of the breaker shell through the control panel.

Compared with the prior art, the utility model discloses the beneficial effect who produces is:

1. this overload protection mechanism of circuit breaker, the electric current passes through metal material's connecting plate one in proper order, fly leaf and connecting plate two communicate, when taking place instantaneous overload, the electric current that the circuit passes through is great, great electric current enters into electromagnet assembly one and makes it produce the magnetism the same with bottom magnet one, thereby promote the fly leaf and shift up, fly leaf and connecting plate two formation open circuit, accomplish the purpose of instantaneous outage, and great electric current can enter into electromagnet assembly two simultaneously and make it produce the magnetism opposite with magnet two, and drive and cut off the picture peg and remove and insert in the clearance between fly leaf and the connecting plate two, form the continuous open circuit, fly leaf fall back after avoiding the electric current to disappear, avoid appearing the condition that the circuit switched on under the non-artificial condition.

Drawings

FIG. 1 is an overall view of the present invention;

FIG. 2 is a schematic view of the internal structure of the present invention;

FIG. 3 is a front view of the present invention;

fig. 4 is a cross-sectional view of a first electromagnet assembly of the present invention;

fig. 5 is a cross-sectional view of the second electromagnet assembly of the present invention.

In the figure: 1. a circuit breaker housing; 2. a first connecting plate; 3. a second connecting plate; 4. a movable plate; 5. a guide rod; 6. a support spring; 7. a magnet I; 8. a first electromagnet assembly; 81. an electromagnet I; 82. a first insulating connecting block; 83. a first resistor column; 9. an electromagnet assembly II; 91. an electromagnet II; 92. a second insulating connecting block; 93. a second resistor column; 10. a second magnet; 11. a control panel; 12. partition inserting plates.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the 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.

In the description of the present application, it should be noted that the terms "vertical", "upper", "lower", "horizontal", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present application.

In the description of the present application, it should be further noted that, unless otherwise explicitly stated or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may include, for example, a fixed connection, a detachable connection, an integral connection, a mechanical connection, an electrical connection, a direct connection, a connection through an intermediate medium, and a connection between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to specific circumstances.

As shown in fig. 1-5, an overload protection mechanism of circuit breaker, including circuit breaker casing 1, be provided with overload protection mechanism in the circuit breaker casing 1, overload protection mechanism includes first 2 and two 3 connecting plates of metal material's connecting plate, fly leaf 4 has been set up between first 2 and the two 3 connecting plates of connecting plate, electromagnet assembly 8 is installed to the bottom of fly leaf 4, the below that circuit breaker casing 1's inner chamber is located electromagnet assembly 8 is provided with magnet 7, sliding connection has the wall picture peg 12 on two 3 connecting plates, two 10 magnets are installed to the upper end of wall picture peg 12, two 9 electromagnet assembly are installed with two 10 relative positions of magnet on the fly leaf 4.

The electric current passes through the first connecting plate, the movable plate and the second connecting plate which are made of metal materials in sequence, when instantaneous overload occurs, the electric current passing through the circuit is large, large electric current enters the first electromagnet assembly to enable the first electromagnet assembly to generate magnetism the same as that of the bottom magnet, the movable plate is pushed to move upwards, the movable plate and the second connecting plate form open circuit, the purpose of instantaneous power failure is achieved, large electric current can enter the second electromagnet assembly to enable the second electromagnet assembly to generate magnetism opposite to that of the second magnet, the partition inserting plate is driven to move and insert into a gap between the movable plate and the second connecting plate, continuous open circuit is formed, the movable plate falls back after the disappearance of the electric current, the situation that the circuit is conducted under the non-artificial situation is avoided, arc extinguishing assemblies and other components in the circuit breaker are set conventionally in the field, the prior art is adopted, and the technical scheme is not further used.

As shown in fig. 2 to 3, in this embodiment, one end of the movable plate 4 is vertically and slidably connected to the first connecting plate 2 through a guide rod 5, the guide rod 5 is made of metal, two guide rods 5 are provided, and each guide rod 5 is sleeved with a support spring 6.

The fly leaf reciprocates through the guide bar, can keep the stability of connecting to through the supporting spring who sets up, make it can be stably in the use with connecting plate one and connecting plate two phase intercommunication, can both carry out safe handling under the state of installing at different inclinations.

As shown in fig. 2 to 4, in this embodiment, the first electromagnet assembly 8 and the first magnet 7 are located on the same vertical plane, the second electromagnet assembly 9 and the second magnet 10 are located on the same horizontal plane, the first electromagnet assembly 8 includes a first insulating connecting block 82 and a first electromagnet 81, the first electromagnet 81 is connected to the movable plate 4 through the first insulating connecting block 82, two first resistance columns 83 are embedded in the first insulating connecting block 82, and the movable plate 4 is connected to the terminals of the first electromagnet 81 through the two first resistance columns 83.

The large current enters the first electromagnet assembly and is communicated with the first electromagnet through the first two resistance columns, the first electromagnet generates magnetism the same as that of the first magnet, the first electromagnet is subjected to repulsive force, the movable plate is driven to move upwards, the movable plate and the connecting plate form an open circuit, the open circuit can be completed quickly, and safety is high.

As shown in fig. 2 to 5, in this embodiment, the second electromagnet assembly 9 includes a second insulating connecting block 92 and a second electromagnet 91, the second electromagnet 91 is connected to the movable plate 4 through the second insulating connecting block 92, two second resistance columns 93 are embedded in the second insulating connecting block 92, the movable plate 4 is connected to the terminals of the second electromagnet 91 through the two second resistance columns 93, the partition board 12 is of an L-shaped structure, and the outer side of the upper end of the partition board 12 is transversely inserted into the outer side of the circuit breaker housing 1 through the control board 11.

When accomplishing instantaneous outage, great current can enter into electromagnet assembly two simultaneously, and two intercommunications with electromagnet through two resistance post two, make electromagnet two produce the magnetism opposite with magnet two, and drive and cut off the picture peg and remove and insert in the clearance between fly leaf and the connecting plate two, form the continuous circuit break, the fly leaf falls back after avoiding the electric current to disappear, avoid appearing the condition that the circuit switched on under the non-artificial condition, and accessible pulling control panel is beaten the separation picture peg and is removed, thereby remove the separation to the fly leaf, accomplish and reset.

The working principle is as follows: the current is communicated with the movable plate 4 and the connecting plate II 3 through the connecting plate I2 made of metal materials in sequence, when instantaneous overload occurs, the current passing through the circuit is large, large current enters the electromagnet assembly I8 to enable the electromagnet assembly I to generate magnetism the same as that of the bottom magnet I7, the movable plate 4 is pushed to move upwards, the movable plate 4 and the connecting plate II 3 form open circuit, the purpose of instantaneous power failure is achieved, large current can enter the electromagnet assembly II 9 to enable the electromagnet assembly II to generate magnetism opposite to that of the magnet II 10, the partition plugboard 12 is driven to move and be inserted into a gap between the movable plate 4 and the connecting plate II 3, continuous open circuit is formed, and the movable plate 4 is prevented from falling back after the current disappears.

While certain exemplary embodiments of the present invention have been described above by way of illustration only, it will be apparent to those of ordinary skill in the art that the described embodiments may be modified in various different ways without departing from the spirit and scope of the present invention. Accordingly, the drawings and description are to be regarded as illustrative in nature and not as restrictive on the scope of the appended claims.

Claims (7)

1. The utility model provides an overload protection mechanism of circuit breaker, includes circuit breaker casing, its characterized in that: be provided with overload protection mechanism in the circuit breaker casing, overload protection mechanism includes the connecting plate one and the connecting plate two of metal material, the fly leaf has been set up between connecting plate one and the connecting plate two, electromagnet assembly one is installed to the bottom of fly leaf, the below that the inner chamber of circuit breaker casing is located electromagnet assembly one is provided with magnet one, sliding connection has the wall picture peg on the connecting plate two, magnet two is installed to the upper end of wall picture peg, install electromagnet assembly two with magnet two relative position on the fly leaf.

2. The overload protection mechanism for a circuit breaker according to claim 1, wherein: one end of the movable plate is vertically and slidably connected with the connecting plate through a guide rod, and the guide rod is made of metal.

3. The overload protection mechanism for a circuit breaker according to claim 2, wherein: the guide bar is provided with two, and each has cup jointed supporting spring on the guide bar.

4. The overload protection mechanism for a circuit breaker according to claim 1, wherein: the first electromagnet assembly and the first magnet are located on the same vertical surface, and the second electromagnet assembly and the second magnet are located on the same horizontal surface.

5. The overload protection mechanism of the circuit breaker according to claim 4, wherein: the first electromagnet assembly comprises an insulation connecting block I and an electromagnet I, the electromagnet I is connected with the movable plate through the insulation connecting block I, two resistance columns I are embedded in the insulation connecting block I, and the movable plate is connected with the wiring end of the electromagnet I through the two resistance columns I.

6. The overload protection mechanism of the circuit breaker according to claim 1, wherein: the second electromagnet assembly comprises a second insulating connecting block and a second electromagnet, the second electromagnet is connected with the second movable plate through the second insulating connecting block, two second resistance columns are embedded in the second insulating connecting block, and the second movable plate is connected with wiring ends of the second electromagnet through the two second resistance columns.

7. The overload protection mechanism for a circuit breaker according to claim 6, wherein: the partition inserting plate is of an L-shaped structure, and the outer side of the upper end of the partition inserting plate is transversely inserted into the outer side of the breaker shell through the control panel.

Images