CN215731550U

CN215731550U - Intelligent residual current circuit breaker with backup protection device

Info

Publication number: CN215731550U
Application number: CN202121493939.8U
Authority: CN
Inventors: 龚明才; 徐波; 李军; 李佳
Original assignee: Zhejiang Minghui Intelligent Electric Co ltd
Current assignee: Zhejiang Minghui Intelligent Electric Co ltd
Priority date: 2021-06-30
Filing date: 2021-06-30
Publication date: 2022-02-01
Anticipated expiration: 2031-06-30

Abstract

The utility model discloses an intelligent residual current circuit breaker with a backup protection device, which comprises a shell, wherein a trip bar is rotatably connected on the shell, the trip bar is provided with a trip block, the shell is provided with a backup protection device, the backup protection device is positioned below the trip bar, the backup protection device comprises a tripping base, wherein two ends of the tripping base are provided with vertical supporting blocks, a fixing frame is sleeved on the supporting block, a tripping magnetic yoke is connected on the fixing frame in a sliding manner, a tripping hook block is arranged on the tripping magnetic yoke and is positioned above the tripping block, a reset spring is arranged between the tripping base and the tripping magnetic yoke, when the main switch can not act to break the circuit in time when the electric leakage reclosing is carried out, the backup protection device can timely disconnect the circuit in a short time, and the safety of equipment and personnel on the circuit is ensured.

Description

Intelligent residual current circuit breaker with backup protection device

Technical Field

The utility model belongs to the field of intelligent circuit breakers, and particularly relates to an intelligent residual current circuit breaker with a backup protection device.

Background

The leakage circuit breaker is mainly used for the electric shock protection of the personnel who has fatal danger when the electric leakage trouble takes place for equipment, overload and short-circuit protection function have, can be used for the overload and the short circuit of protection circuit or motor, also can be used for distributing the electric energy, start asynchronous motor infrequently, for adapting to the development demand, can set up the controller on original leakage circuit breaker, realize the intelligent protection to the circuit, come opening and shutting of controller to the circuit through the controller, and install the backup protection release additional in the present intelligent leakage circuit breaker, when the main switch of circuit breaker can't break circuit or produce the time delay disconnection, accessible backup protection release in time breaks the circuit, thereby carry out line protection effectively.

The most that uses in current leakage circuit breaker is the tripping device of rotary type, like the patent document of publication No. CN205789817U discloses a moulded case circuit breaker, and it includes back-up protection trip gear, including iron core, support and armature, armature rotates between round pin axle and the support to be connected, is provided with the torsional spring on the round pin axle, and when back-up protection trip gear operated, armature on its iron core took place to rotate, and the trip rod that drives the circuit breaker through the hook-shaped body on the armature rotates to realize the dropout.

However, when a short circuit occurs in the circuit, the rotation of the armature is not sensitive enough, and if the main switch acts, a fault circuit is disconnected in a delayed manner, so that the safety of equipment and personnel in the circuit is damaged.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects of the prior art, the utility model provides a backup protection device which can break a circuit in a short time when an intelligent leakage reclosing main switch does not break the circuit in time.

In order to achieve the purpose, the utility model provides the following technical scheme: the utility model provides an intelligence residual-current circuit breaker who possesses reserve protection device, includes the casing, it is connected with the trip bar to rotate on the casing, be provided with the trip block on the trip bar, be provided with reserve protection device on the casing, reserve protection device is located the below of trip bar, reserve protection device is including the dropout base, and the both ends of dropout base are provided with vertical supporting shoe, the cover is equipped with fixed frame on the supporting shoe, sliding connection has the dropout yoke on the fixed frame, be provided with the dropout hook piece on the dropout yoke, the dropout hook piece is located the top of trip block, be provided with reset spring between dropout base and the dropout yoke.

Further, a limiting rod is arranged on the fixing frame, a waist-shaped through hole is formed in the tripping magnetic yoke, and the limiting rod penetrates through the waist-shaped through hole and is in sliding connection with the waist-shaped through hole.

Furthermore, a spring groove is formed in the end portion, facing the tripping magnetic yoke, of the supporting block, and the return spring is located in the spring groove.

Furthermore, the fixed frame comprises a first half frame and a second half frame, the first half frame and the second half frame are respectively positioned on two sides of the supporting block, and a gap is formed between the first half frame and the second half frame.

Furthermore, fixing protrusions are arranged on the first half frame and the second half frame, fixing holes are formed in the fixing protrusions, fixing rivets are arranged on the fixing holes between the first half frame and the second half frame, the fixing rivets sequentially penetrate through the first half frame, the supporting block and the second half frame, and the fixing protrusions are abutted to the supporting block.

Compared with the prior art, the utility model has the beneficial effects that: the armature rotating on the backup protection device is changed into the tripping magnetic yoke which vertically moves by magnetic force, the accuracy degree of the reset spring is greater than that of the torsion spring, and the tripping magnetic yoke can be attracted by the supporting block more quickly and accurately, so that when a circuit is in a large-current short circuit, if the leakage reclosing cannot timely break the circuit by the action of the main switch, the circuit can be timely broken by the backup protection device in a short time, and the safety of equipment and personnel on the circuit is ensured.

Drawings

FIG. 1 is a schematic view of an installation structure of a backup protection device and a housing according to the present invention;

FIG. 2 is a schematic view of the mounting structure of the backup protection device and the trip bar;

FIG. 3 is a schematic structural diagram of a backup protection device;

fig. 4 is an exploded view of the backup protection device.

Reference numerals: 1. a housing; 2. a trip bar; 3. a trip block; 4. a backup protection device; 401. a tripping base; 402. a support block; 403. a fixing frame; 404. tripping the magnetic yoke; 405. a trip hook block; 406. a return spring; 407. a limiting rod; 408. a waist-shaped through hole; 409. a spring slot; 410. a first half frame; 411. a second half frame; 412. a fixed protrusion; 413. a fixing hole; 414. and (5) fixing the rivet.

Detailed Description

In the description of the present invention, it should be noted that, for the terms of orientation, such as "central", "lateral (X)", "longitudinal (Y)", "vertical (Z)", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicate that the orientation and positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the 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 should not be construed as limiting the specific scope of the present invention.

Furthermore, if the terms "first" and "second" are used for descriptive purposes only, they are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features. Thus, a definition of "a first" or "a second" feature may explicitly or implicitly include one or more of the features, and in the description of the utility model, "a number" or "a number" means two or more unless explicitly specified otherwise.

The present invention is further explained with reference to fig. 1 to 4.

The utility model provides an intelligence residual-current circuit breaker that possess back-up protection device, includes casing 1, it is connected with trip bar 2 to rotate on the casing 1, be provided with trip block 3 on trip bar 2, be provided with back-up protection device 4 on the casing 1, back-up protection device 4 is located the below of trip bar 2, back-up protection device 4 is including tripping base 401, and tripping base 401's both ends are provided with vertical supporting shoe 402, the cover is equipped with fixed frame 403 on the supporting shoe 402, sliding connection has tripping yoke 404 on the fixed frame 403, be provided with tripping hook 405 on tripping yoke 404, tripping hook 405 is located tripping block 3's top, be provided with reset spring 406 between tripping base 401 and the tripping yoke 404.

Preferably, the trip base 401 and the support block 402 are integrated, and the support block 402 and the trip yoke 404 are made of metal material with good magnetic conductivity, so that a self-excitation field can be generated around when a certain current is applied.

As shown in fig. 1 to 4, the trip base 401 is installed at the bottom of the housing 1 and is connected to the internal circuit of the housing 1, after the power is turned on, the supporting block 402 generates magnetism after receiving current, and an attractive force attracting the trip yoke 404 is generated, when the current voltage in the circuit is in a normal range, the attractive force generated by the supporting block 402 and the elastic force generated by the return spring 406 reach a balance, and the backup protection device 4 does not act; when the current and voltage in the circuit exceed the normal range and the main switch of the leakage reclosing switch cannot timely disconnect the circuit, after the supporting block 402 receives a large current, the attraction force generated by the supporting block 402 exceeds the elastic force of the reset spring 406, namely, the tripping yoke 404 is attracted to move towards the supporting block 402, and the tripping yoke 404 is abutted against the supporting block 402, and when the tripping yoke 404 moves, the tripping hook block 405 is abutted against the tripping block 3 and then drives the tripping rod 2 to rotate on the shell 1 through the tripping block 3, so that the circuit can be disconnected, the circuit is disconnected in a very short time after the main switch does not act, the safety of equipment and personnel in the circuit is protected, the structure is compact, the occupied space is small, and the actions of other components in the leakage reclosing switch are not influenced.

After the circuit is disconnected, the magnetic force of the tripping base 401 is lost, the tripping magnetic yoke 404 moves upwards under the elastic force of the reset spring 406 to reset, and then the next backup protection action can be prepared.

As shown in fig. 2 to 4, in the preferred embodiment, a fixing frame 403 is provided with a limiting rod 407, the trip yoke 404 is provided with a waist-shaped through hole 408, the limiting rod 407 passes through the waist-shaped through hole 408 and is slidably connected with the waist-shaped through hole 408, when the backup protection device 4 does not operate, the limiting rod 407 abuts against the lower bottom surface of the waist-shaped through hole 408, and a return spring 406 between the trip yoke 404 and a supporting block 402 has a certain return elastic force, so that when the earth leakage reclosure normally operates, the attraction force of the trip base 401 to the trip yoke 404 can be resisted, and the power is prevented from being disconnected when the circuit is normally operated; when the backup protection device 4 operates, the movement of the tripping yoke 404 can be limited through the waist-shaped through hole 408, and when the limiting rod 407 is abutted against the upper bottom surface of the waist-shaped hole, the tripping hook block 405 just drives the tripping rod 2 to rotate to trip, so that the tripping yoke 404 is prevented from excessively moving to influence the reset.

As shown in fig. 3, in the preferred embodiment, a spring groove 409 is disposed at an end of the supporting block 402 facing the trip yoke 404, the return spring 406 is located in the spring groove 409, two sides of the spring groove 409 are shielded by the fixing frame 403, and the spring groove 409 guides the extension and retraction of the return spring 406, so that the middle of the return spring 406 is prevented from being bent and deformed when being compressed, which affects the elastic force of the return spring 406 and further affects the trip efficiency of the trip lever 2.

As shown in fig. 4, the fixing frame 403 of the preferred embodiment includes a first half frame 410 and a second half frame 411, the first half frame 410 and the second half frame 411 are respectively located at two sides of the supporting block 402, and a gap is provided between the first half frame 410 and the second half frame 411, when the fixing frame 403 is installed, the first half frame 410 and the second half frame 411 are respectively installed at the inner side and the outer side of the supporting block 402, and the bottom surfaces of the first half frame 410 and the second half frame 411 are tightly attached to the surface of the supporting block 402, so that a certain gap is formed between two sides of the first half frame 410 and the second half frame 411, and then the first half frame 410 and the second half frame 411 are fixed together, that is, the first half frame 410 and the second half frame 411 can be fixed on the supporting block 402, thereby preventing the fixing frame 403 and the supporting block 402 from being loosened to affect the moving effect of the trip yoke 404.

As shown in fig. 4, in the preferred embodiment, the first half frame 410 and the second half frame 411 are provided with fixing protrusions 412, the fixing protrusions 412 are provided with fixing holes 413, the fixing holes 413 between the first half frame 410 and the second half frame 411 are provided with fixing rivets 414, the fixing rivets 414 sequentially pass through the first half frame 410, the supporting block 402 and the second half frame 411, the fixing protrusions 412 are abutted against the supporting block 402, when the first half frame 410 and the second half frame 411 are mounted on the supporting block 402, the fixing rivets 414 sequentially pass through the fixing holes 413 on the first half frame 410, the fixing holes 413 on the supporting block 402 and the second half frame 411, then the tail of the fixing rivets 414 is expanded by using a tool, so that the first half frame 410 and the second half frame 411 can be fixed on the supporting plate, the fixing protrusions 412 are abutted against the supporting block 402, so that the rest surfaces of the first half frame 410 and the second half frame 411 except for the fixing protrusions 412 are tightly attached to the supporting block 402, a larger space is formed between the bottom surfaces of the first half frame 410 and the second half frame 411, so that the tripping yoke 404 can slide in the fixing frame 403 conveniently.

The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the utility model may occur to those skilled in the art without departing from the principle of the utility model, and are considered to be within the scope of the utility model.

Claims

1. The utility model provides an intelligence residual-current circuit breaker that possesses backup protection device, includes the casing, its characterized in that: the utility model discloses a trip device, including casing, back-up protection device, tripping base, trip block, reset spring, back-up protection device is provided with vertical supporting shoe including the tripping base on the casing, the both ends of tripping base are provided with vertical supporting shoe on the tripping bar, the cover is equipped with fixed frame on the supporting shoe, sliding connection has the trip yoke on the fixed frame, be provided with the trip hook piece on the trip yoke, the trip hook piece is located the top of trip block, be provided with reset spring between trip base and the trip yoke.

2. The intelligent residual current circuit breaker with a backup protection device according to claim 1, characterized in that: the fixing frame is provided with a limiting rod, the tripping magnetic yoke is provided with a waist-shaped through hole, and the limiting rod penetrates through the waist-shaped through hole and is in sliding connection with the waist-shaped through hole.

3. The intelligent residual current circuit breaker with a backup protection device according to claim 2, characterized in that: the supporting block is provided with a spring groove on the end portion facing the tripping magnetic yoke, and the reset spring is located in the spring groove.

4. The intelligent residual current circuit breaker with a backup protection device according to claim 3, characterized in that: the fixed frame comprises a first half frame and a second half frame, the first half frame and the second half frame are respectively positioned on two sides of the supporting block, and a gap is formed between the first half frame and the second half frame.

5. The intelligent residual current circuit breaker with a backup protection device according to claim 4, characterized in that: the fixing device is characterized in that fixing protrusions are arranged on the first half frame and the second half frame, fixing holes are formed in the fixing protrusions, fixing rivets are arranged on the fixing holes between the first half frame and the second half frame, the fixing rivets sequentially penetrate through the first half frame, the supporting block and the second half frame, and the fixing protrusions are abutted to the supporting block.