CN215933514U

CN215933514U - Novel leakage circuit breaker with overload protection

Info

Publication number: CN215933514U
Application number: CN202122672029.2U
Authority: CN
Inventors: 胡永强; 吴长金; 金蕾; 梁松兮; 郑剑
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-11-03
Filing date: 2021-11-03
Publication date: 2022-03-01
Anticipated expiration: 2031-11-03

Abstract

The utility model discloses a novel leakage circuit breaker with overload protection, which is characterized in that: the circuit breaker comprises a circuit breaker shell and a circuit breaker structure, wherein the circuit breaker structure comprises a circuit board, an operating mechanism and an overload action mechanism, the circuit breaker shell is also provided with a handle, the handle is connected with a U-shaped pin, the other end of the U-shaped pin is connected with the operating mechanism, and the operating mechanism is connected with an instantaneous protection mechanism and an action mechanism; the overload action mechanism comprises a thermal bimetallic strip and a bimetallic pull rod, one end of the bimetallic strip is connected with the bimetallic pull rod; this practical residual current circuit breaker simple structure is reasonable, when the circuit takes place electric leakage, overcurrent, short circuit or heavy current in the twinkling of an eye, triggers operating device fast and realizes tripping, and protection circuit avoids the electric power risk, and the device powerful is practical, and the structure is small and exquisite small-size, low cost, convenient to use, and the operational reliability is high, and long service life receives environmental impact little, easily promotes.

Description

Novel leakage circuit breaker with overload protection

Technical Field

The utility model relates to the technical field of circuit breakers, in particular to a novel leakage circuit breaker with overload protection.

Background

The leakage protector, called leakage breaker for short, is mainly used for protecting the human body with fatal danger from electric shock when the equipment has leakage fault, and generally has the functions of short-circuit protection, overload protection, leakage protection, overvoltage and undervoltage protection, leakage self-checking and the like.

SUMMERY OF THE UTILITY MODEL

In view of the prior art, an object of the present invention is to provide a small earth leakage circuit breaker having practical functions such as earth leakage protection, overload protection, and transient protection.

In order to achieve the above purpose, the utility model adopts the technical scheme that: a novel leakage circuit breaker with overload protection comprises a circuit breaker shell and a circuit breaker structure arranged in the circuit breaker shell, wherein the circuit breaker structure comprises a circuit board, an operating mechanism and an overload action mechanism, a handle which is exposed out of the circuit breaker shell is further arranged in the circuit breaker shell, a U-shaped pin is connected onto the handle, the other end of the U-shaped pin is connected with the operating mechanism, an instantaneous protection mechanism is arranged on one side of the operating mechanism and comprises a coil framework and an instantaneous coil which is sleeved on the coil framework, an action mechanism for short circuit triggering action is arranged in the coil framework, and a first plastic ejector rod which is opposite to the operating mechanism and used for driving the operating mechanism to act is arranged at one end, facing the operating mechanism; the overload action mechanism comprises a thermal bimetallic strip and a bimetallic pull rod, one end of the bimetallic strip is connected to the operating mechanism, and one end of the thermal bimetallic strip is connected to the bimetallic pull rod.

As a further arrangement of the above scheme, the circuit breaker structure is further provided with a static contact rod, the operating mechanism is provided with a moving contact which moves relative to the static contact rod, the handle swings relative to the circuit breaker shell to trigger the lock catch and the jump buckle of the operating mechanism to be closed, and the moving contact movably contacts the static contact rod when the lock catch and the jump buckle are closed.

According to the scheme, the moving iron core, the static iron core and the iron core spring with two ends respectively abutting against the moving iron core and the static iron core are arranged in the action mechanism, and the end of the first plastic ejector rod abuts against one end of the moving iron core.

As a further arrangement of the above scheme, an electric leakage tripping mechanism is further arranged between the first plastic ejector rod and the operating mechanism, the electric leakage tripping mechanism comprises a movable iron core, one end of the movable iron core abuts against one end of the first plastic ejector rod, and the other end of the movable iron core abuts against a second plastic ejector rod and a top spring used for driving the movable iron core to reset.

As a further arrangement of the above scheme, the leakage tripping device further comprises a zero sequence current transformer, wherein the zero sequence current transformer is connected with the circuit board and used for detecting the zero sequence current trigger circuit board to control the action of the leakage tripping mechanism.

As the further setting of above-mentioned scheme, the circuit breaker casing includes casing and lower casing, and its side is provided with input and output, be provided with the safety vent that runs through both on the circuit breaker casing of handle and handle one side.

As a further arrangement of the scheme, an arc extinguish chamber is further arranged in the circuit breaker shell and is provided with arc extinguish grid pieces, arc isolating plates and arc extinguish baffles.

Has the advantages that: due to the adoption of the technical scheme, the utility model discloses a leakage circuit breaker simple structure is reasonable, when the condition such as electric leakage takes place for the circuit, detecting element zero sequence current transformer feeds back to the circuit board fast, the trigger control electric leakage is taken off mouthful quick dropout of mechanism effect operating device, realize operating device hasp motion through two gold structures when overcurrent appears in the circuit, the handle separating brake is tripped, set up instantaneous coil when the circuit takes place the short circuit or heavy current in the twinkling of an eye, the quick action operating device realizes the separation of dropout handle, the device powerful is practical, the structure is small and exquisite small-size, low cost, high durability and convenient use, high reliability, long service life, it is little influenced by the environment, and easy popularization.

Drawings

Fig. 1 is a schematic structural diagram of the circuit breaker of the present invention.

Fig. 2 is a schematic diagram of the internal structure of the circuit breaker of the present invention.

Fig. 3 is a schematic structural diagram of an instantaneous protection mechanism of the circuit breaker.

Fig. 4 is a schematic cross-sectional structure diagram of the instantaneous protection mechanism of the circuit breaker.

Reference numerals: 1. a circuit breaker housing; 11. an upper housing; 12. a lower housing; 21. a handle; 211. a safety vent; 22. a U-shaped pin; 23. an operating mechanism; 231. locking; 232. jumping and buckling; 24. a moving contact; 25. a stationary contact bar; 3. an instantaneous protection mechanism; 31. a transient coil; 32. a coil bobbin; 33. an actuating mechanism; 331. a movable iron core; 332. a stationary iron core; 333. an iron core spring; 34. a first plastic ejector rod; 35. a movable iron core; 36. a second plastic ejector rod; 37. a spring is supported; 4. a leakage tripping mechanism; 5. an overload actuating mechanism; 51. a thermal bimetallic strip; 52. a bimetallic pull rod; 6. a zero sequence current transformer; 8. an arc extinguishing chamber; 81. arc extinguishing grid pieces; 83. an arc extinguishing baffle; 9. a circuit board.

Detailed Description

In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the utility model will be rendered by reference to the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflicting with each other.

A novel residual current circuit breaker with overload protection as shown in fig. 1-4, which comprises a circuit breaker housing 1, a circuit breaker structure arranged in the circuit breaker housing 1, the breaker structure comprises a circuit board 9, an operating mechanism 23 and an overload actuating mechanism 5, a handle 21 which is exposed out of the breaker shell 1 is arranged in the breaker shell 1, the handle 21 is connected with a U-shaped pin 22, the other end of the U-shaped pin 22 is connected with an operating mechanism 23, one side of the operating mechanism 23 is provided with an instantaneous protection mechanism 3, the instantaneous protection mechanism 3 comprises a coil framework 32 and an instantaneous coil 31 sleeved on the coil framework 32, an actuating mechanism 33 for short-circuit triggering action is arranged in the coil framework 32, and one end of the actuating mechanism 33, facing the operating mechanism 23, is provided with a first plastic ejector rod 34 which is opposite to the operating mechanism 23 and is used for driving the operating mechanism 23 to act; the overload actuating mechanism 5 comprises a thermal bimetallic strip 51 and a bimetallic pull rod 52 with one end connected to the operating mechanism 23, and one end of the thermal bimetallic strip 51 is connected to the bimetallic pull rod 52.

As a further arrangement of the above scheme, the circuit breaker structure is further provided with a static contact rod 25, the operating mechanism 23 is provided with a movable contact 24 which moves relative to the static contact rod 25, the handle 21 swings relative to the circuit breaker housing 1 to trigger the latch 231 and the jumper 232 of the operating mechanism 23 to close, and when the latch 231 and the jumper 232 are closed, the movable contact 24 movably contacts the static contact rod 25.

As a further arrangement of the above scheme, the moving iron core 331, the static iron core 332, and the iron core spring 333 whose two ends respectively abut against the moving iron core 331 and the static iron core 332 are arranged in the actuating mechanism 33, and the end of the first plastic ejector rod 34 abuts against one end of the moving iron core 331.

As a further arrangement of the above scheme, an electric leakage tripping mechanism 4 is further arranged between the first plastic ejector rod 34 and the operating mechanism 23, the electric leakage tripping mechanism 4 includes a movable iron core 35 with one end abutting against the end of the first plastic ejector rod 34, and the other end of the movable iron core 35 is abutted against a second plastic ejector rod 36 and a top spring 37 for driving the movable iron core 35 to reset.

As a further arrangement of the above scheme, the leakage tripping device further comprises a zero sequence current transformer 6, wherein the zero sequence current transformer 6 is connected with a circuit board 9 and is used for detecting that the zero sequence current triggers the circuit board 9 to control the leakage tripping mechanism 4 to act.

As a further arrangement of the above scheme, the circuit breaker housing 1 includes an upper housing 11 and a lower housing 12, an input end and an output end are disposed on the side surfaces of the upper housing and the lower housing, and a safety hole 211 penetrating through the handle 21 and the handle 21 is disposed on the circuit breaker housing 1 on one side thereof.

As a further arrangement of the above scheme, an arc extinguishing chamber 8 is further arranged in the circuit breaker housing 1, and the arc extinguishing chamber 8 is provided with arc extinguishing grids 81, arc isolating plates and arc extinguishing baffles 83.

The working principle is as follows: when the circuit breaker is in a normal working state, the handle 21 drives the operating mechanism 23 to act through the U-shaped pin 22, so that the jump buckle 232 of the operating mechanism 23 is buckled with the lock buckle 231, the lock buckle 231 locks the jump buckle 232 through structural cooperation with the jump buckle 232, the action of the operating mechanism 23 simultaneously drives the moving contact 24 to move towards the static contact rod 25, so that the moving contact 24 and the static contact rod 25 are kept in a closed state, and two ends of the circuit breaker are electrified;

when a circuit is short-circuited (instantaneous large current), an instantaneous coil 31 generates a magnetic field, the magnetic field drives a movable iron core 331 to move towards a static iron core 332 along an inner hole of a coil framework 33, an iron core spring 333 is compressed, a plastic ejector rod 34 is triggered, the plastic ejector rod 34 moves towards an operating mechanism 23 and directly acts on a movable iron core 35 of a leakage tripping mechanism 4 between the operating mechanism 23 and the coil framework 33, a plastic ejector rod two 36 in the leakage tripping mechanism 4 is ejected out through the movable iron core 35 and directly acts on the operating mechanism 23, the end part of the plastic ejector rod two 36 is opposite to a lock catch 231, therefore, the plastic ejector rod two 36 extends out to directly trigger the lock catch 231, the lock catch 231 moves and releases the lock catch 232, the lock catch 231 and the jump catch 232 are released, a handle 21 is opened, and the breaker is powered off to realize instantaneous protection;

when overcurrent occurs in a circuit, the thermal bimetallic strip 51 of the load actuating mechanism 5 is quickly heated and deformed, and based on the fixed arrangement of one end of the thermal bimetallic strip, the deformation and the bending of the thermal bimetallic strip enable the bimetallic strip 52 connected with the other end to be pulled by the bending deformation of the bimetallic strip to move, the movement of the bimetallic strip 52 drives the lock 231 to move, the separation of the lock 231 and the jump buckle 232 is realized, and the overload protection is realized when the handle opening circuit breaker is powered off;

when the leakage current appears in the circuit, the zero sequence current transformer 6 of the detection element detects the generation of the zero sequence current and feeds back a signal to the circuit board 9, the circuit board 9 obtains a signal trigger threshold value to control the action of the leakage tripping mechanism, the plastic ejector rod II 36 of the leakage tripping mechanism is ejected out to act on the operating mechanism latch, and the circuit breaker is powered off to realize the leakage protection.

Because of adopting the technical scheme, the utility model discloses an electric leakage circuit breaker simple structure is reasonable, when the condition such as electric leakage takes place for the circuit, detecting element zero sequence current transformer feeds back to the circuit board fast, trigger control electric leakage tripping operation mechanism effect quick release, realize operating device hasp motion through two gold structures when overcurrent appears in the circuit, handle separating brake is tripped, set up instantaneous coil when the circuit takes place the short circuit or heavy current in the twinkling of an eye, quick-action operating device realizes tripping handle separation, the device powerful is practical, the structure is small and exquisite small-size, low cost, high reliability, long service life, it is little to receive the environmental impact, easily promote the condition such as electric leakage, easily promote

It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the utility model. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims

1. The utility model provides a novel take overload protection's residual current circuit breaker which characterized in that: it includes circuit breaker casing (1), sets up the circuit breaker structure in circuit breaker casing (1), the circuit breaker structure includes circuit board (9), operating device (23), overload actuating mechanism (5), still be provided with in circuit breaker casing (1) and expose handle (21) that circuit breaker casing (1) set up, be connected with U type round pin (22) on handle (21), operating device (23) are connected to the other end of U type round pin (22), one side of operating device (23) is provided with instantaneous protection mechanism (3), instantaneous protection mechanism (3) include coil skeleton (32) and cover locate instantaneous coil (31) on coil skeleton (32), be provided with actuating mechanism (33) that are used for the short circuit to trigger the action in coil skeleton (32), actuating mechanism (33) set up towards the one end of operating device (23) and are used for driving plastics ejector pin (34) that operating device (23) moved to operating device (23) ) (ii) a The overload action mechanism (5) comprises a thermal bimetallic strip (51) and a bimetallic pull rod (52) with one end connected to the operating mechanism (23), and the bimetallic pull rod (52) is connected to one end of the thermal bimetallic strip (51).

2. A novel residual current circuit breaker with overload protection according to claim 1, characterized in that: the circuit breaker structure is further provided with a static contact rod (25), the operating mechanism (23) is provided with a moving contact (24) moving relative to the static contact rod (25), the handle (21) swings relative to the circuit breaker shell (1) to trigger the lock catch (231) and the jump buckle (232) of the operating mechanism (23) to be closed, and the moving contact (24) is in movable contact with the static contact rod (25) when the lock catch (231) and the jump buckle (232) are closed.

3. A novel residual current circuit breaker with overload protection according to claim 1, characterized in that: the moving mechanism (33) is internally provided with a moving iron core (331), a static iron core (332) and an iron core spring (333) with two ends respectively abutting against the moving iron core (331) and the static iron core (332), and the end part of the first plastic ejector rod (34) abuts against one end of the moving iron core (331).

4. A novel residual current circuit breaker with overload protection according to claim 3, characterized in that: still be provided with electric leakage tripping device (4) between plastics ejector pin (34) and operating device (23), electric leakage tripping device (4) include that one end supports in movable iron core (35) of plastics ejector pin (34) tip, movable iron core (35) other end butt is provided with plastics ejector pin two (36) and is used for driving top spring (37) that movable iron core (35) reset.

5. A novel residual current circuit breaker with overload protection according to claim 4, characterized in that: the zero sequence current transformer (6) is connected with a circuit board (9) and used for detecting the zero sequence current trigger circuit board (9) to control the action of the leakage tripping mechanism (4).

6. A novel residual current circuit breaker with overload protection according to claim 1, characterized in that: breaker housing (1) includes casing (11) and lower casing (12), and its side is provided with input and output, be provided with safety vent (211) that run through both on breaker housing (1) of handle (21) and handle (21) one side.

7. A novel residual current circuit breaker with overload protection according to claim 1, characterized in that: still be provided with explosion chamber (8) in circuit breaker casing (1), explosion chamber (8) are equipped with arc extinguishing bars piece (81), flash barrier and arc extinguishing baffle (83).