CN111180275A

CN111180275A - Locking mechanism of plug-in circuit breaker

Info

Publication number: CN111180275A
Application number: CN202010215908.XA
Authority: CN
Inventors: 彭子龙; 孟亚军; 鲁开智; 黄小勇
Original assignee: Shenzhen Taiyong Electric Co ltd
Current assignee: Shenzhen Taiyong Electric Co ltd
Priority date: 2020-03-25
Filing date: 2020-03-25
Publication date: 2020-05-19

Abstract

The invention provides a locking mechanism of a plug-in circuit breaker, which comprises a base, a buckle, a return spring, a button and a cover, wherein the buckle is arranged on the base; when the buckle is pressed by the cabinet body, the buckle limits the button in the closing direction; when the circuit breaker is in a closing state, the buckle is limited by the button and cannot move downwards; when the circuit breaker is in the separating brake state, the button is continuously pulled out leftwards, and the button can drive the buckle to move downwards. By arranging the locking mechanism in the circuit breaker, the following purposes can be achieved: 1. when the plug-in circuit breaker is not completely installed in the cabinet, the switching-on operation cannot be carried out; 2. when the plug-in circuit breaker is in a closing state, the plug-in circuit breaker cannot be inserted into the cabinet body to be connected with the copper bar of the cabinet body; 3. when the plug-in circuit breaker is taken out, the button is pulled to be opened, and then the button is pulled continuously (the locking mechanism can be unlocked automatically) to take out. The invention is not only convenient to use, but also can effectively ensure the personal safety of operators in the installation, use and replacement processes.

Description

Locking mechanism of plug-in circuit breaker

Technical Field

The invention relates to the technical field of circuit breakers, in particular to a locking mechanism of a plug-in circuit breaker.

Background

A mechanical switching device, which can switch on, carry and break current under normal circuit conditions, and also switch on, carry current for a certain time and break current under specified abnormal conditions (such as breaker conditions), is widely used in power distribution systems.

The installation mode of the circuit breaker is divided into: fixed, drawer type and bayonet, along with distribution system's continuous development, upgrade, fixed circuit breaker is in the installation, it is convenient inadequately in the aspect of change and maintenance, bayonet circuit breaker's application constantly increases thereupon, for guaranteeing operating personnel at the installation, use and the personal safety of change in-process, bayonet circuit breaker's locking mechanical system is especially important, current traditional locking mechanical system mostly is through outside padlock or shell fragment with the circuit breaker locking on the rack, must relieve the additional tool if need to change or take out the circuit breaker, and insert or extract under the combined floodgate state probably appears, harm operating personnel's safety.

Disclosure of Invention

In view of the above problems, an object of the present invention is to provide a locking mechanism for a plug-in circuit breaker, which is not only convenient to use, but also can avoid the dangerous situations such as live operation caused by improper operation when an operator installs and replaces the plug-in circuit breaker; by arranging the locking mechanism in the circuit breaker, the following purposes can be achieved: 1. when the plug-in circuit breaker is not completely installed in the cabinet, the switch-on operation cannot be carried out, 2, when the plug-in circuit breaker is in a switch-on state, the plug-in cabinet body cannot be inserted and is connected with a copper bar of the plug-in circuit breaker, and 3, when the plug-in circuit breaker is taken out, only the push button needs to be pulled to enable the plug-in circuit breaker to be opened, and then the push button continues to. The specific technical scheme is as follows:

a locking mechanism of a plug-in circuit breaker comprises a base, a buckle, a return spring, a button and a cover; the base is provided with the upper right corner of the shell of the circuit breaker, and the middle part of the right side of the base is provided with a first limiting part; the method is characterized in that: the buckle is arranged in the base and can slide up and down in the base, the middle part of the buckle is concave inwards to form an L-shaped cavity, the left side of the cavity is inclined downwards to form an inclined plane, the upper right corner of the buckle is provided with a second limiting part which is positioned right above the first limiting part, and the top of the second limiting part protrudes upwards to form a buckle structure; the reset spring is arranged between the first limiting part and the second limiting part and provides a force value for resetting the buckle; the button is arranged in the base and positioned above the buckle to limit the buckle, the button can slide left and right in the base, a columnar bulge extending into the cavity is arranged on the back of the right upper corner of the button, and a U-shaped groove is arranged on the front of the right lower corner of the button; the button is linked with the circuit breaker operating mechanism through a connecting rod, one end of the connecting rod is clamped into the U-shaped groove, and the other end of the connecting rod is connected to the circuit breaker operating mechanism, so that the switching-on or switching-off of the circuit breaker is realized; the cover is arranged on the shell of the circuit breaker and is positioned above the button for limiting the button; when the columnar bulge of the button is positioned at the right end of the bottom of the cavity and the buckle structure extends out of the square groove arranged on the cabinet body, the circuit breaker is installed in place and is in a closing state; when the column arch of button was pulled cavity bottom left end, the circuit breaker was in the separating brake state, continued pulling button left, inclined plane cooperation on column arch and the buckle and along the inclined plane upper left side remove the cavity top (realize the linkage of button and buckle), the pulling buckle makes buckle structure downstream move until breaking away from the restriction of the square groove that sets up on the cabinet body, the unblock, the circuit breaker is in can take out the state.

Furthermore, the buckle can only move up and down in the base for limiting; the base is provided with a first structural rib, a second structural rib and a third structural rib which are used for limiting the buckle, and the buckle can only do translational motion in the base due to the first structural rib, the second structural rib and the third structural rib.

Furthermore, the button can only translate left and right in the base for limitation; the base is provided with a fourth structural rib and a fifth structural rib which are used for limiting the button, and the button can only do translational motion in the base due to the existence of the fourth structural rib and the fifth structural rib.

Furthermore, in order to ensure that the inclined plane of the L-shaped cavity is optimally matched with the columnar bulge, the linkage between the button and the buckle achieves the optimal effect, and the columnar bulge is of a cylindrical structure.

Furthermore, the right side of the vertical cavity at the top of the cavity is a first limiting surface, and the top surface of the horizontal cavity at the bottom of the cavity is a second limiting surface.

Furthermore, the first limiting surface limits the position of the button through the pair of columnar bulges.

Further, the button is matched with the second limiting surface through the columnar protrusion, and the limit of the buckle is achieved.

The invention has the beneficial effects that:

the invention is convenient to use, can avoid the dangerous conditions of live operation and the like caused by improper operation during installation and replacement of operators, and effectively ensures the personal safety of the operators in the installation, use and replacement processes.

Drawings

The present invention will be described in further detail with reference to the accompanying drawings.

FIG. 1 is a schematic view of the locking mechanism mounting structure of the present invention (the housing is partially schematic);

FIG. 2 is a schematic view of the circuit breaker in place mounted state and the cabinet body (the cabinet is partially schematic);

FIG. 3 is a schematic view of the mounting structure of the snap and the return spring of the present invention (the housing is partially schematic);

FIG. 4 is a schematic view of the snap-fit structure of the present invention;

FIG. 5 is a schematic view of the button construction of the present invention;

FIG. 6 is a schematic diagram of the circuit breaker in the present invention in the on-position (inside the cabinet) state;

fig. 7 is a schematic structural diagram of a closing state of the circuit breaker according to the present invention;

fig. 8 is a schematic diagram of the circuit breaker of the present invention when not in place (in the cabinet);

fig. 9 is a schematic structural view of the circuit breaker of the invention when pulled out of the cabinet and unlocked;

shown in the figure: 1-base, 2-buckle, 3-reset spring, 4-button, 5-cover, 6-cabinet body and 7-operating mechanism.

Detailed Description

The invention is described in further detail below with reference to the drawings and specific examples.

As shown in fig. 1-9, the locking mechanism of a plug-in circuit breaker of the present invention comprises a base 1, a buckle 2, a return spring 3, a button 4, and a cover 5; the upper right corner of circuit breaker shell is installed to base 1, is equipped with spacing portion 1d in base 1 right side middle part.

As shown in fig. 3, the buckle 2 is installed in the base 1 and can slide up and down in the base 1; the buckle 2 is limited by a first structural rib 1a, a second structural rib 1b and a third structural rib 1c arranged on the base 1, and a button 4 is arranged on the upper side of the buckle to limit the buckle, so that the buckle 2 can only do translational motion in the base 1; the middle part of the buckle 2 is concave inwards to form an L-shaped cavity 2e, the left surface of the cavity 2e is inclined downwards to form an inclined plane 2d, the upper right corner of the buckle 2 is provided with a second limiting part 2c which is positioned right above the first limiting part 1d, and the top of the second limiting part 2c is convex upwards to form a buckle structure 2 f; when the circuit breaker is not installed to the cabinet or is completely installed in place, the buckling structure 2f extends upwards out of the shell of the circuit breaker. Reset spring 3 installs between spacing portion 1d and spacing portion two 2c, provides the power value for the reseing of buckle 2.

As shown in fig. 1 and 3, the button 4 is installed in the base 1 and located above the buckle 2 to limit the buckle 2, and the button 4 can slide left and right in the base 1; the button 4 is limited by a structural rib four 1e and a structural rib five 1f arranged on the base 1, and the upper side of the button is limited by a cover 5, so that the button 4 can only do translational motion in the base 1; a columnar bulge 4b extending into the cavity 2e is arranged on the back of the upper right corner of the button 4, and a U-shaped groove 4a is arranged on the front of the lower right corner of the button 4; the button 4 is linked with the circuit breaker operating mechanism 7 through a connecting rod, one end of the connecting rod is clamped into the U-shaped groove 4a, and the other end of the connecting rod is connected to the circuit breaker operating mechanism 7, so that the switching-on or switching-off of the circuit breaker is realized. In order to ensure that the inclined plane 2d of the L-shaped cavity 2e is optimally matched with the columnar protrusion 4c, the linkage between the button 4 and the buckle 2 achieves the optimal effect, and the columnar protrusion 4c is of a cylindrical structure.

The cover 5 is mounted on the circuit breaker housing and is positioned above the button 4 for restraining the button 4.

When the columnar bulge 4b of the button 4 is positioned at the right end of the bottom of the cavity 2e and the buckle structure 2f extends out of the square groove 6a arranged on the cabinet body 6, the circuit breaker is installed in place and is in a closing state; when the cylindrical protrusion 4b of the button 4 is pulled to the left end of the bottom of the cavity 2e, the circuit breaker is in a switching-off state, the button 4 is continuously pulled leftwards, the cylindrical protrusion 4b is matched with the inclined plane 2d on the buckle 2 and moves leftwards and upwards along the inclined plane to the top of the cavity 2e (linkage of the button 4 and the buckle 2 is realized), the buckle 2 is pulled to enable the buckle structure 2f to move downwards until the buckle structure is separated from the limit of the square groove 6a arranged on the cabinet body 6, unlocking is realized, and the circuit breaker is in a removable state.

As shown in fig. 4 and 5, the right surface of the vertical cavity at the top of the cavity 2e is a first limiting surface 2a, and the top surface of the horizontal cavity at the bottom of the cavity 2e is a second limiting surface 2 b. The first limiting surface 2a limits the columnar protrusion 4b to limit the button 4. The button 4 is matched with the second limiting surface 2b through the columnar bulge 4b to limit the buckle 2. Button 4 realizes

button

4 and 2 linkages of buckle through the cooperation of cylindrical protrusion 4b with the inclined plane 2d on the buckle 2.

As shown in fig. 6 and 7, when the circuit breaker is not installed in the cabinet or is completely installed in place, the columnar protrusion 4b of the button 4 is located in the transverse cavity at the bottom of the cavity 2e, the button 4 is pushed rightwards, the columnar protrusion 4b on the button 4 moves in the cavity 2e and moves from the left end of the cavity 2e to the right end of the cavity 2e, and therefore the operating mechanism (7) is driven to be linked, and the circuit breaker is switched on.

As shown in fig. 8, when the circuit breaker is not installed in place (installed in the cabinet 6 without being in place), the buckle structure 2f of the buckle 2 is pressed by the cabinet 6, the buckle 2 integrally slides downwards, so that the columnar protrusion 4b is located at the top of the vertical cavity of the cavity 2e, when the button 4 is pushed (pressed) rightwards, the columnar protrusion 4b on the button 4 is limited by the first limiting surface 2a on the buckle 2, and the button 4 cannot slide rightwards, so that the function of switching on cannot be achieved when the circuit breaker is not installed in place.

As shown in fig. 7, when the circuit breaker is in the on-state, the protruding 4b of column on the button 4 has been in the horizontal cavity right side in cavity 2e bottom of buckle 2, when the circuit breaker inserted cabinet body 6, because spacing two 2b of face on the buckle 2 will be restricted by the protruding 4b of column, buckle 2 can't the lapse, buckle structure 2f just can't move down in the withdrawal base 1, the circuit breaker just also can't insert the cabinet body 6 completely and be connected with its copper bar, thereby realize that the circuit breaker on-state can't insert the cabinet body completely and be connected with its copper bar.

As shown in fig. 7, fig. 6, fig. 9 and fig. 2, when the circuit breaker is installed in place (in the cabinet body 6) and is in a closing state, the button 4 is pulled leftwards, the button 4 slides leftwards to drive the operating mechanism 7 to open the circuit breaker, the button 4 is continuously pulled leftwards, the columnar protrusion 4b on the button 4 is matched with the inclined surface 2d on the buckle 2 to enable the columnar protrusion 4b to slide leftwards and upwards to the top of the vertical cavity of the cavity 2e, and meanwhile, the buckle 2 moves downwards until the buckle structure 2f is separated from the limit of the square groove 6a arranged on the cabinet body 6, so that unlocking is realized, and the circuit breaker is taken out.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims

1. A locking mechanism of a plug-in circuit breaker comprises a base (1), a buckle (2), a return spring (3), a button (4) and a cover (5); the base (1) is provided with the upper right corner of the shell of the circuit breaker, and the middle part of the right side of the base (1) is provided with a first limiting part (1 d); the method is characterized in that: the buckle (2) is installed in the base (1) and can slide up and down in the base (1), the middle of the buckle (2) is concave inwards to form an L-shaped cavity (2 e), the left surface of the cavity (2 e) is inclined downwards to form an inclined surface (2 d), the upper right corner of the buckle (2) is provided with a second limiting part (2 c) located right above the first limiting part (1 d), and the top of the second limiting part (2 c) protrudes upwards to form a buckle structure (2 f); the reset spring (3) is arranged between the first limiting part (1 d) and the second limiting part (2 c); the button (4) is installed in the base (1) and located above the buckle (2) to limit the buckle (2), the button (4) can slide left and right in the base (1), a columnar bulge (4 b) extending into the cavity (2 e) is arranged on the back of the upper right corner of the button (4), and a U-shaped groove (4 a) is arranged on the front of the lower right corner of the button (4); the button (4) is linked with the breaker operating mechanism (7) through a connecting rod, one end of the connecting rod is clamped into the U-shaped groove (4 a), and the other end of the connecting rod is connected to the breaker operating mechanism (7), so that the switching-on or switching-off of the breaker is realized; the cover (5) is arranged on the shell of the circuit breaker and is positioned above the button (4) for limiting the button (4); when the columnar bulge (4 b) of the button (4) is positioned at the right end of the bottom of the cavity (2 e) and the buckle structure (2 f) extends out of a square groove (6 a) arranged on the cabinet body (6), the circuit breaker is installed in place and is in a closing state; when column arch (4 b) of button (4) was pulled cavity (2 e) bottom left end, the circuit breaker was in the separating brake state, continue pulling button (4) left, inclined plane (2 d) cooperation and along the inclined plane on column arch (4 b) and buckle (2) top left side removed cavity (2 e) top, pulling buckle (2) make buckle structure (2 f) down move until breaking away from the restriction of square groove (6 a) that set up on the cabinet body (6), the unblock, the circuit breaker is in and can takes out the state.

2. A locking mechanism of a plug-in circuit breaker according to claim 1, characterized in that: the base (1) is provided with a first structural rib (1 a), a second structural rib (1 b) and a third structural rib (1 c) which are used for limiting the buckle (2).

3. A locking mechanism of a plug-in circuit breaker according to claim 1, characterized in that: and a structural rib four (1 e) and a structural rib five (1 f) for limiting the button (4) are arranged on the base (1).

4. A locking mechanism of a plug-in circuit breaker according to claim 1, characterized in that: the columnar bulge (4 b) is of a cylindrical structure.

5. A locking mechanism of a plug-in circuit breaker according to any one of claims 1-4, characterized in that: the right side of the vertical cavity at the top of the cavity (2 e) is a first limiting surface (2 a), and the top surface of the horizontal cavity at the bottom of the cavity (2 e) is a second limiting surface (2 b).

6. A locking mechanism of a plug-in circuit breaker according to claim 5, characterized in that: the first limiting surface (2 a) limits the columnar protrusions (4 b) to limit the buttons (4).

7. A locking mechanism of a plug-in circuit breaker according to claim 6, characterized in that: the button (4) is matched with the second limiting surface (2 b) through the columnar bulge (4 b) to limit the buckle (2).