CN110911240A

CN110911240A - Interlocking device of plug-in circuit breaker

Info

Publication number: CN110911240A
Application number: CN201911307455.7A
Authority: CN
Inventors: 刘磊; 李焰锋; 李敏; 张罗; 丁国辉; 师建轩
Original assignee: Zhejiang Minghui Intelligent Electric Co Ltd
Current assignee: Zhejiang Minghui Intelligent Electric Co Ltd
Priority date: 2019-12-18
Filing date: 2019-12-18
Publication date: 2020-03-24

Abstract

An interlock device for a plug-in circuit breaker, characterized in that: the handle is provided with a first position which is erected relative to the outer side end of the shell during opening and a second position which is attached to the outer side end of the shell during closing. The switch-off device has the advantages that the handle not only can play a definite indication effect on the position state of the switch-off and switch-on, but also can be used as a pulling operation structure for pulling the plug-in circuit breaker out of the cabinet, so that when the plug-in circuit breaker is pulled out through the handle, the handle is inevitably positioned at the upright first position, the plug-in circuit breaker is ensured to be positioned in the switch-off state when being pulled out, misoperation is avoided, and the switch-off device is safe and reliable.

Description

Interlocking device of plug-in circuit breaker

Technical Field

The invention relates to a circuit breaker, in particular to an interlocking device of a plug-in circuit breaker.

Background

Circuit breakers are classified into high-voltage circuit breakers and low-voltage circuit breakers according to their range of use. The low-voltage circuit breaker is also called an automatic switch, and is an electric appliance which not only has the function of a manual switch, but also can automatically perform voltage loss, undervoltage, overload and short-circuit protection. It can be used for distributing electric energy, starting asynchronous motor infrequently, protecting power supply circuit and motor, etc., when they are seriously overloaded or short-circuited or under-voltage, etc. faults occur, it can automatically cut off circuit, its function is equivalent to the combination of fuse type switch and over-and under-heat relay, etc., and after breaking fault current, it does not need to change parts, so that it has been extensively used.

The circuit breaker is divided into: the plug-in circuit breaker can effectively improve the safety of the use industry of electrical equipment by using plug-in circuit breakers, and the structures of the plug-in circuit breakers are developed into various types in order to meet the installation requirements of various electrical equipment along with the wide use of the plug-in circuit breaker on various electrical equipment.

However, at present, the plug-in type circuit breaker has no plug-in structure, is difficult to pull out after being installed in a cabinet, needs external force or additional tools, is inconvenient to operate, has no on-off state indication, and is easy to cause serious safety accidents once the plug-in type circuit breaker is pulled out of the cabinet in a closing state.

Disclosure of Invention

To overcome the deficiencies of the background art, the present invention provides an interlock for a plug-in circuit breaker.

The technical scheme adopted by the invention is as follows: the interlocking device of the plug-in circuit breaker comprises a shell and a handle, wherein the handle is hinged at the outer side end of the shell; the handle is provided with a first position which is erected relative to the outer side end of the shell during opening and a second position which is attached to the outer side end of the shell during closing.

An operation hole is formed on the handle.

A rotating shaft and a closing locking mechanism are also arranged in the shell, and the handle is in linkage connection with the rotating shaft through a connecting rod; the closing locking mechanism comprises a first pressing plate and a first elastic piece, the first pressing plate is movably arranged in the shell, one end of the first pressing plate is provided with a first linkage part which can be in contact fit with the rotating shaft, the other end of the first pressing plate is provided with a first locking part, the shell is provided with a first slot hole corresponding to the first locking part, and the rotating shaft is of a cam structure and can push the first pressing plate to act and enable the first locking part to penetrate out of the first slot hole when closing; the first elastic piece is abutted against the first pressing plate and can drive the first pressing plate to reset.

The first pressing plate is hinged and matched with the shell, and the first elastic piece is a torsion spring.

And the rotating shaft is also provided with a limiting boss which can be in limiting fit with the first pressing plate during brake opening.

The shell is also internally provided with a rotating shaft and an operation locking mechanism, and the handle is in linkage connection with the rotating shaft through a connecting rod; the operation locking mechanism comprises a second pressing plate and a second elastic piece, the second pressing plate is hinged in the shell, one end of the second pressing plate is provided with a second locking part, the other end of the second pressing plate is provided with a second linkage part, and the shell is provided with a second slot hole corresponding to the second linkage part; the rotating shaft is provided with a locking boss corresponding to the second locking part, the second elastic piece is abutted against the second pressing plate and can drive the second pressing plate to act, so that the second linkage part penetrates through the second slotted hole, and the second locking part is in limit locking with the locking boss.

The wiring mechanism comprises a wiring board, a pressing plate and a third elastic piece, the wiring board is fixedly installed in the shell, the pressing plate is movably arranged in the shell and corresponds to the wiring board, a jacking portion extends out of the second pressing plate, and the third elastic piece is arranged between the pressing plate and the jacking portion and can drive the pressing plate to press the wiring board tightly.

The invention has the beneficial effects that: when the handle is located at the first vertical position, the plug-in circuit breaker is shown to be in a switching-off state at the moment, the plug-in circuit breaker can be safely pulled out, meanwhile, the plug-in circuit breaker can be pulled out of the cabinet through the handle, and when the handle is located at the second position attached to the outer side end of the shell, the plug-in circuit breaker is shown to be in a switching-on state at the moment, the plug-in circuit breaker cannot be pulled out, and meanwhile, the plug-in circuit breaker cannot be pulled out of the cabinet through the handle.

The handle not only can play clear indication effect to the position state of divide-shut brake, can regard as the operation structure of drawing that extracts plug-in circuit breaker from the rack moreover, consequently when drawing plug-in circuit breaker through the handle, the handle must be in the first position that stands, guarantees that plug-in circuit breaker is in the separating brake state when being extracted, avoids the maloperation, safe and reliable.

Drawings

Fig. 1 is a schematic structural diagram of a plug-in circuit breaker according to an embodiment of the present invention when the plug-in circuit breaker is in an open state and is not installed in place.

Fig. 2 is an enlarged schematic view of a point a in fig. 1.

Fig. 3 is a schematic structural diagram of the other side surface of the plug-in circuit breaker of the embodiment of the invention when the plug-in circuit breaker is in the opening state and is not installed in place.

Fig. 4 is an enlarged schematic view of fig. 3 at B.

Fig. 5 is a schematic structural diagram of the plug-in circuit breaker in the open state and installed in place according to the embodiment of the present invention.

Fig. 6 is a schematic structural view of the other side of the plug-in circuit breaker of the embodiment of the invention when the plug-in circuit breaker is in the open state and is already installed in place.

Fig. 7 is an enlarged schematic view at C in fig. 6.

Fig. 8 is a schematic structural diagram of the plug-in circuit breaker of the embodiment of the present invention when the plug-in circuit breaker is installed in place and switched on.

Fig. 9 is an enlarged schematic view at D in fig. 8.

Fig. 10 is a schematic structural diagram of a rotating shaft according to an embodiment of the present invention.

Fig. 11 is a schematic structural diagram of a first pressing plate according to an embodiment of the present invention.

FIG. 12 is a schematic structural diagram of a second pressing plate according to an embodiment of the present invention.

Fig. 13 is a schematic structural view of a handle according to an embodiment of the present invention.

Detailed Description

The embodiments of the invention will be further described with reference to the accompanying drawings in which:

as shown in the figure, the interlocking device of the plug-in circuit breaker comprises a shell 1, a handle 2, a rotating shaft 3, a connecting rod 4, a closing locking mechanism 5 and an operation locking mechanism 6.

The handle 2 is hinged at the outer side end of the shell 1 and is in linkage connection with the rotating shaft 3 through the connecting rod 4, the rotating shaft 3 can be in linkage connection with the operating mechanism, and the opening and closing actions of the plug-in circuit breaker can be achieved through the actions of the operating handle 2.

The handle 2 is provided with a first position which stands relative to the shell 1 during opening and a second position which is attached to the shell 1 during closing, when the handle 2 is located at the first position which stands, the condition that the handle is in an opening state at the moment is shown, the plug-in circuit breaker can be safely pulled out, meanwhile, the plug-in circuit breaker can be directly pulled out from the cabinet through the handle, and when the handle 2 is located at the second position which is attached to the outer end of the shell 1, the handle 2 is shown to be in a closing state at the moment, the plug-in circuit breaker cannot be pulled out, and meanwhile, the plug-in circuit breaker cannot be directly pulled out from the cabinet through the handle.

The handle not only can play clear indication effect to the position state of divide-shut brake, can regard as the operation structure of drawing that extracts plug-in circuit breaker from the rack moreover, consequently when drawing plug-in circuit breaker through the handle, the handle must be in the first position that stands, guarantees to be in the separating brake state when plug-in circuit breaker is extracted, avoids the maloperation, safe and reliable.

In order to facilitate the pulling operation, an operation structure for increasing the pulling effect is formed on the handle 2, for example, an operation hole 21 is formed to form a handle shape, so that the pulling operation can be performed more easily and conveniently by hooking the handle.

The closing locking mechanism 5 comprises a first pressing plate 51 and a first elastic element 52, the first pressing plate 51 is hinged in the shell 1, one side of the first pressing plate is provided with a first linkage part 511 corresponding to the rotating shaft 3, the other side of the first pressing plate is provided with a first locking part 512, the shell 1 is provided with a first slot hole 11 corresponding to the first locking part 512, the rotating shaft 3 is of a cam structure and can be contacted with the first linkage part 511 during closing, so that the first pressing plate 51 is pushed to act, and the first locking part 512 extends out of the shell 1 along the first slot hole 11; the first elastic element 52 is a torsion spring, two ends of the torsion spring respectively abut against the first pressing plate 51 and the housing 1, and the first elastic element can drive the first pressing plate 51 to reset when the brake is opened.

Generally, when the plug-in circuit breaker is used, the plug-in circuit breaker needs to be inserted into a slot corresponding to the plug-in circuit breaker in a cabinet, when the plug-in circuit breaker is switched on, the rotating shaft 3 pushes the first pressing plate 51 to move and enable the first locking portion 512 to penetrate through the first slot 11 to form locking fit with the inner wall of the slot of the cabinet, so that the plug-in circuit breaker is prevented from being pulled out when the plug-in circuit breaker is switched on, and switching-on locking; when the breaker is opened, the first pressing plate 51 is reset under the action of the first elastic piece 52 and separated from the inner wall of the slot of the cabinet to realize unlocking, so that the plug-in circuit breaker can be pulled out when the breaker is opened, and the breaker is unlocked.

In addition, the rotating shaft 3 is further provided with a limiting boss 32 which can be in limiting fit with the first pressing plate 51 during opening, so that stable installation of the first pressing plate 51 and the first elastic piece 52 is guaranteed, meanwhile, the first pressing plate 51 is prevented from rotating over, the structure is guaranteed to be reliable, and the action is stable.

Of course, the first pressing plate 51 can be limited by the structure of the limiting column arranged on the housing 1, and only arranged on the rotating shaft 3, the limiting boss 32 can rotate and move around the rotating shaft 3, so that the installation is easier.

The operation locking mechanism 6 comprises a second pressing plate 61 and a second elastic element 62, the second pressing plate 61 is hinged in the housing 1, one end of the second pressing plate 61 is provided with a second locking part 611, the other end of the second pressing plate 61 is provided with a second linkage part 612, and the housing 1 is provided with a second slot 12 corresponding to the second linkage part 612.

The rotating shaft 3 is provided with a locking boss 31 corresponding to the second locking portion 611, the second elastic element 62 is a torsion spring, two ends of the second elastic element respectively contact with the housing 1 and the second pressing plate 61, and the second elastic element can drive the second pressing plate 61 to move, so that the second linkage portion 612 passes through the second slot 12 and the second locking portion 611 and the locking boss 31 are locked in a limiting manner.

Usually, when the plug-in circuit breaker is used, the plug-in circuit breaker needs to be inserted into a corresponding slot in the cabinet, when the plug-in circuit breaker is not inserted in place, under the action of the second elastic element 62, the second linkage portion 612 of the second pressing plate 61 penetrates through the second slot 12, and the second locking portion 611 is locked with the locking boss 31 in a limiting manner, so that the rotating shaft 3 cannot rotate and the closing operation cannot be realized.

The outer side end of the housing 1 is further provided with a wiring mechanism 7, the wiring mechanism 7 comprises a wiring board 71, a pressing plate 72 and a third elastic member 73, the wiring board 71 is fixedly installed in the housing 1, the pressing plate 72 is hinged in the housing 1 and corresponds to the wiring board 71, a pressing portion 613 extends from the second pressing plate 61, and the third elastic member 73 is a spring and is arranged between the pressing plate 72 and the pressing portion 613 and can drive the pressing plate 72 to press the wiring board 71.

When the plug-in circuit breaker is not inserted into the slot of the cabinet, the third elastic element 73 only provides a pre-tightening force for the pressing plate to the wiring board 71, so that the external lead can be easily inserted between the pressing plate 72 and the wiring board 71 or pulled out; when the plug-in circuit breaker is inserted into the slot of the cabinet and is inserted in place, the second pressing plate 61 acts and simultaneously extrudes the third elastic member 73 through the jacking portion 613, so that the elastic force of the third elastic member is increased, and a pressing force on the wiring board is provided for the extrusion plate, therefore, the extrusion plate 72 and the wiring board 71 can clamp the external lead, the external lead is prevented from being pulled out, and reliable wiring is ensured.

As shown in fig. 1-4, the plug-in circuit breaker is in the opening position and is not installed in place, at this time, the first locking portion 512 of the first pressing plate 51 is retracted into the housing 1 under the action of the first elastic member 52, and the first pressing plate 51 is in limit fit with the limit boss 32 of the rotating shaft 3; under the action of the second elastic element 62, the second linkage part 612 of the second pressing plate 61 passes through the second slot 12 and extends out of the housing 1, and the second locking part 611 of the second pressing plate is just in limit fit with the locking boss 31 of the rotating shaft 3, so that the rotating shaft 3 is prevented from rotating and the closing operation cannot be realized; the extrusion plate 72 and the wiring board 71 only keep a certain pre-pressing force, so that the external lead is convenient to detach; the handle 2 is held in the raised first position.

As shown in fig. 5-7, the plug-in circuit breaker is installed in place and at the opening/closing position, at this time, the second pressing plate 61 is engaged with the inner wall of the cabinet, so that it can compress the second elastic element 62, the second linkage portion 612 is retracted into the housing 1, and the second locking portion 611 is just dislocated and separated from the locking boss 31 of the rotating shaft 3, allowing the rotating shaft 3 to rotate, and the opening/closing operation can be achieved; meanwhile, the second pressing plate 61 presses the third elastic member 73, so as to press the pressing plate 72, thereby enhancing the clamping force between the pressing plate 72 and the wiring board 71 and ensuring the firm and reliable connection of the external wires.

As shown in fig. 8-9, the plug-in circuit breaker has been installed in place and is in the closing position, at this time, the rotating shaft 3 abuts against the first linkage portion 511 of the first pressing plate 51, and compresses the first elastic member 51, so that the first locking portion 512 thereof passes through the first slot 11 and extends out of the housing 1, and can be locked with the inner wall of the cabinet, thereby preventing the plug-in circuit breaker from being pulled out; the handle 2 remains in the flat second position, effectively preventing the unplugging action of the plug-in circuit breaker.

In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those 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 invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art. In addition, in the description of the present invention, "a plurality" means two or more unless otherwise specified.

The skilled person should understand that: although the invention has been described in terms of the above specific embodiments, the inventive concept is not limited thereto and any modification applying the inventive concept is intended to be included within the scope of the patent claims.

Claims

1. An interlocking device for a plug-in circuit breaker, comprising a casing (1) and a handle (2), the handle (2) being hinged on the outer end of the casing (1); characterized in that: the handle (2) The utility model has a first position that stands up relative to the outer end of the casing (1) and is used for hand-held pulling when the switch is opened, and a second position that fits with the outer end of the casing (1) when the switch is closed.

2 . The interlocking device of a plug-in circuit breaker according to claim 1 , wherein an operating hole ( 21 ) is formed on the handle ( 2 ). 3 .

3. An interlocking device for a plug-in circuit breaker according to claim 1, characterized in that: the housing (1) is further provided with a rotating shaft (3), a closing locking mechanism (5), and the handle (2) It is linked with the rotating shaft (3) through the connecting rod (4);

The closing locking mechanism (5) includes a first pressing plate (51) and a first elastic member (52), the first pressing plate (51) is movably arranged in the casing (1), and the first pressing plate (51) One end is provided with a first linkage portion (511) that can contact and cooperate with the rotating shaft (3), the other end is provided with a first locking portion (512), and the housing (1) is provided with a corresponding first locking portion (512) The first slot (11) of the device, the rotating shaft (3) has a cam structure, which can push the first pressing plate (51) to move and make the first locking part (512) pass through the first slot (11) when the switch is closed ); the first elastic member (52) is in conflict with the first pressing plate (51), which can drive the first pressing plate (51) to reset.

4. An interlocking device for a plug-in circuit breaker according to claim 3, characterized in that: the first pressing plate (51) is hingedly fitted with the casing (1), and the first elastic member (52) is a torsion spring.

5. An interlocking device for a plug-in circuit breaker according to claim 4, characterized in that: the rotating shaft (3) is further provided with a limiter that can cooperate with the first pressing plate (51) when the switch is opened. Limit boss (32).

6 . The interlocking device of a plug-in circuit breaker according to claim 1 , characterized in that: the housing ( 1 ) is further provided with a rotating shaft ( 3 ), an operation locking mechanism ( 6 ), and the handle ( 2) It is linked with the rotating shaft (3) through the connecting rod (4); the operation locking mechanism (6) includes a second pressing plate (61) and a second elastic member (62), and the second pressing plate (61) is hinged on the Inside the casing (1), one end of the second pressing plate (61) is provided with a second locking portion (611), and the other end is provided with a second linkage portion (612). The casing (1) is provided with a second linkage portion (612). The second slot (12) corresponding to the locking portion (612); the rotating shaft (3) is provided with a locking boss (31) corresponding to the second locking portion (611), and the second elastic member (62) is connected to the second locking portion (611). The second pressing plate (61) collides, which can drive the second pressing plate (61) to move, so that the second linkage portion (612) passes through the second slot (12), and the second locking portion (611) and the locking boss ( 31) Limit lock.

7 . The interlocking device of a plug-in circuit breaker according to claim 6 , wherein the outer end of the casing ( 1 ) is further provided with a wiring mechanism ( 7 ), and the wiring mechanism ( 7 ) includes wiring A plate (71), a pressing plate (72), and a third elastic member (73), the wiring plate (71) is fixedly installed in the casing (1), and the pressing plate (72) is movably arranged in the casing (1) ) and corresponding to the wiring board (71), a top pressing portion (613) extends from the second pressing plate (61), and the third elastic member (73) is arranged between the pressing plate (72) and the top Between the pressing parts (613), the pressing plate (72) can be driven to press the wiring board (71).