CN214956511U

CN214956511U - Mechanical interlocking system of dual-power switch cabinet

Info

Publication number: CN214956511U
Application number: CN202121170617.XU
Authority: CN
Inventors: 钟昌盛; 张周文
Original assignee: Xiamen Huadian Switchgear Co Ltd
Current assignee: Xiamen Huadian Switchgear Co Ltd
Priority date: 2021-05-27
Filing date: 2021-05-27
Publication date: 2021-11-30
Anticipated expiration: 2031-05-27

Abstract

The mechanical interlocking system comprises a first switch cabinet, a second switch cabinet, a first locking device arranged on the first circuit breaker, a second locking device arranged on the second circuit breaker and an inter-cabinet transmission device. The first switch cabinet comprises a first cabinet body and a first breaker arranged in the first cabinet body, and a first opening is formed in the side face, corresponding to the first cabinet body of the first breaker, of the first switch cabinet. The second cubical switchboard includes the second cabinet body and sets up the second circuit breaker in the second cabinet body, corresponds to the second trompil has been seted up to the side of the second cabinet body of second circuit breaker. The first blocking device is arranged on the first circuit breaker. The second blocking device is arranged on the second circuit breaker. The transmission device between the cabinets is detachably arranged between the first cabinet body and the second cabinet body through the first opening and the second opening.

Description

Mechanical interlocking system of dual-power switch cabinet

Technical Field

The disclosure relates to the field of electrical equipment, in particular to a mechanical interlocking system of a dual-power switch cabinet.

Background

With the development of society, the reliability of power supply and the quality of electric energy are more and more strict for many users. Particularly, in some occasions such as data centers, hospitals, important transportation, airports and the like, a common power supply and a standby power supply are usually provided, and when the common power supply is powered off, the standby power supply needs to be immediately put into use. In practical use, the common power supply and the standby power supply in the switch cabinet can not be connected at the same time, otherwise, safety accidents can happen. Therefore, in order to improve safety, a mechanical interlock function is required between a normal power supply and a standby power supply, in addition to an electrical interlock function to prevent the other circuit breaker from being closed.

One common electrical interlock scheme is to disable the closing trip coil of one circuit breaker to disable the closing trip coil of the other circuit breaker when the circuit breaker is closed. The interlocking mode is only electric and inoperable, and cannot prevent manual forced operation or misoperation.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem that the interlocking mode in the related art is only electric non-operable and cannot prevent manual misoperation or forced operation closing, the disclosure provides a mechanical interlocking system of a dual-power switch cabinet, which can prevent manual misoperation or forced operation closing in an interlocking state.

The present disclosure provides a mechanical interlock system of a dual power switch cabinet, including:

the first switch cabinet comprises a first cabinet body and a first circuit breaker arranged in the first cabinet body, and a first opening is formed in the side surface, corresponding to the first circuit breaker, of the first cabinet body;

the second switch cabinet comprises a second cabinet body and a second circuit breaker arranged in the second cabinet body, and a second opening is formed in the side surface, corresponding to the second circuit breaker, of the second cabinet body;

the first locking device is arranged on the first circuit breaker and comprises a first locking transmission component and a first locking plate in transmission connection with the first locking transmission component, and the first locking plate limits the rotation of a closing half shaft of the first circuit breaker when swinging downwards;

the second locking device is arranged on the second circuit breaker and comprises a second locking transmission component and a second locking plate in transmission connection with the second locking transmission component, and the second locking plate limits the rotation of a closing half shaft of the second circuit breaker when swinging downwards;

the inter-cabinet transmission device is detachably arranged between the first cabinet body and the second cabinet body through the first opening and the second opening and comprises a first input crank arm, a first output crank arm in transmission connection with the first input crank arm, a second input crank arm arranged opposite to the first input crank arm and a second output crank arm in transmission connection with the second input crank arm; the end part of a main shaft of the first circuit breaker is provided with a first main shaft output device, the first main shaft output device drives the first input crank arm to rotate when the main shaft of the first circuit breaker is switched on and rotates, and the first output crank arm drives the second locking device to act so as to lock a switching-on half shaft of the second circuit breaker; and a second main shaft output device is installed at the end part of the main shaft of the second circuit breaker, the second main shaft output device drives the second input crank arm to rotate when the main shaft of the second circuit breaker is switched on and rotates, and the second output crank arm drives the first locking device to act so as to lock the switching-on half shaft of the first circuit breaker.

Optionally, the transmission device between cabinets is of a modular structure.

Optionally, the modular structure includes a module frame, and a first transmission assembly and a second transmission assembly which are mounted on the module frame and separated from each other;

the module frame includes a plurality of longitudinal partitions, each of which divides the module frame into a plurality of regions, and the first and second transmission assemblies extend through each of the regions and are independent of each other.

Optionally, the first transmission assembly includes the first input crank arm, a first roller disposed on the first input crank arm, a first input crank arm shaft connected with the first input crank arm, a first connecting rod hinged to the first input crank arm shaft, a first intermediate transition shaft hinged to the first connecting rod, a first connecting rod hinged to the first intermediate transition shaft, a first connecting shaft hinged to the first connecting rod, and a first output crank arm connected to the first connecting shaft, the first link extends upwardly from one end of the first input bell crank shaft, the first intermediate transition shaft traverses the module frame, the first connecting rod extends upwards from the first intermediate transition shaft, so that the first connecting rod, the first intermediate transition shaft and the first connecting rod form an inverted Z-shaped structure, the first spindle output device drives the first input crank arm to rotate by shifting the first roller;

the second transmission component comprises the second input crank arm, a second roller arranged on the second input crank arm, a second input crank arm shaft connected with the second input crank arm, a second connecting rod hinged with the second input crank arm shaft, a second intermediate transition shaft hinged with the second connecting rod, a second connecting rod hinged with the second intermediate transition shaft, a second connecting shaft hinged with the second connecting rod and a second output crank arm connected with the second connecting shaft, the second link extends upwardly from one end of the second input bell crank shaft, the second intermediate transition shaft traverses the module frame, the second connecting rod extends upwards from the second intermediate transition shaft, so that the second connecting rod, the second intermediate transition shaft and the second connecting rod form an inverted Z shape, the second spindle output device drives the second input crank arm to rotate by shifting the second roller.

Optionally, the module frame includes five longitudinal partition plates, which are divided into six regions, namely a first region to a sixth region, the second input crank shaft and the first input crank shaft are symmetrically disposed with respect to the middle longitudinal partition plate of the module frame, a connection path formed by each component of the first transmission assembly extends from the lower side of the first region to the upper side of the sixth region in a Z-shape, and a connection path formed by each component of the second transmission assembly extends from the lower side of the sixth region to the upper side of the first region in a Z-shape.

Optionally, the first connecting rod and the second connecting rod are both: the double-end connecting rod, the length of double-end connecting rod can be adjusted.

Optionally, a first motion track groove for limiting a swing angle of the first input connecting lever is formed in the upper end of the first input connecting lever, the first input connecting lever is matched with a first connecting piece on the module frame through the first motion track groove and can swing around the first connecting piece, and a swing angle defined by the first motion track groove is larger than a rotation angle required for closing a main shaft of a first circuit breaker;

the upper end of the second input connecting lever is provided with a second action track groove used for limiting the swing angle of the second input connecting lever, the second input connecting lever is matched with a second connecting piece on the module frame through the second action track groove and can swing around the second connecting piece, and the swing angle of the second action track groove is larger than the rotation angle required for closing of a main shaft of a second breaker.

Optionally, the first transmission assembly is further provided with a first reset spring, the first reset spring is sleeved on a first input crank arm shaft of the first transmission assembly, one end of the first reset spring is located at the side of the first connecting piece, the other end of the first reset spring is fixed on a first connecting rod of the transmission device between the cabinets, and when the first circuit breaker is opened, the first input crank arm is enabled to reset;

the second transmission assembly is further provided with a second reset spring, the second reset spring is sleeved on a second input crank arm shaft of the second transmission assembly, one end of the second reset spring is located on the side portion of the second connecting piece, the other end of the second reset spring is fixed on a second connecting rod of the transmission device between the cabinets, and the second input crank arm is enabled to reset when the second circuit breaker is opened.

Optionally, the first latching transmission assembly includes a first latching input crank arm driven by the second output crank arm to swing, a first latching driving rod located at the top of the rack of the first circuit breaker and used for being sleeved with the first latching input crank arm, and a first latching input connecting rod connected with the first latching driving rod and extending into the rack of the second circuit breaker, one end of the first latching plate is fixed inside the rack of the first circuit breaker, and the other end of the first latching plate is connected with the first latching input connecting rod and can swing up and down under the driving of the first latching input connecting rod;

the second locks transmission assembly include by first output connecting lever drive wobbling second locks input connecting lever, is located the frame top of second circuit breaker just is used for cup jointing the second of second shutting input connecting lever locks the actuating lever, with the second locks the actuating lever and connects and stretch into the inside second of frame of second circuit breaker locks the input connecting rod, the one end of second locking board is fixed the frame of second circuit breaker is inboard, the other end with the second locks the input connecting rod and connects, and the drive of second locking input connecting rod can the luffing motion down.

Optionally, the first locking transmission assembly further includes a first fixing seat, a first limiting member fixed to the first fixing seat, and a first locking limiting plate installed on the first locking driving rod and capable of rotating along with the first locking driving rod, where the first limiting member is located on a rotation path of the first locking limiting plate, and when the first locking limiting plate rotates to a predetermined angle, the first locking limiting plate is limited by the first limiting member and cannot rotate continuously, so as to limit a rotation angle of the first locking driving rod;

the second locking transmission assembly further comprises a second fixing seat, a second limiting part fixed on the second fixing seat and a second locking limiting plate installed on the second locking driving rod and capable of rotating along with the second locking driving rod, the second limiting part is located on a rotating path of the second locking limiting plate, and when the second locking limiting plate rotates to a preset angle, the second locking limiting plate is limited by the second limiting part and cannot rotate continuously, so that the rotating angle of the second locking driving rod is limited.

Optionally, the first latching transmission assembly further includes a first latching return spring located between the first latching limiting plate and the first fixing seat, one end of the first latching return spring is connected to the first latching limiting plate, the other end of the first latching return spring is located below a first limiting screw, the first limiting screw is fixed on the first fixing seat, and the first latching return spring urges the first latching driving rod to reset when the second circuit breaker is opened;

the second shutting transmission assembly is further located including the cover on the second shutting actuating lever and be located the second shutting limiting plate with the second shutting reset spring of second fixing base, the one end of second shutting reset spring connect in the second shutting limiting plate, the other end is located the below of second stop screw, the second stop screw is fixed in on the first fixing base, the second shutting reset spring is in during first circuit breaker separating brake, make the second shutting actuating lever realizes reseing.

Optionally, the first spindle output device and the second spindle output device each include: the circuit breaker comprises a connecting shaft device connected with a main shaft of a corresponding circuit breaker and a driving plate installed on the connecting shaft device.

The technical scheme provided by the embodiment of the disclosure can have the following beneficial effects:

the utility model provides a mechanical interlock system of dual supply switch cabinet, this mechanical interlock system include first cubical switchboard, second cubical switchboard, set up first blocking device on the first circuit breaker, set up second blocking device and the transmission between the cabinet on the second circuit breaker. The first switch cabinet comprises a first cabinet body and a first breaker arranged in the first cabinet body, and a first opening is formed in the side face, corresponding to the first cabinet body of the first breaker, of the first switch cabinet. The second cubical switchboard includes the second cabinet body and sets up the second circuit breaker in the second cabinet body, corresponds to the second trompil has been seted up to the side of the second cabinet body of second circuit breaker. The first locking device is arranged on the first circuit breaker and comprises a first locking transmission component and a first locking plate in transmission connection with the first locking transmission component, and the first locking plate limits the rotation of a closing half shaft of the first circuit breaker when swinging downwards. The second locking device is arranged on the second circuit breaker and comprises a second locking transmission component and a second locking plate in transmission connection with the second locking transmission component, and the second locking plate limits the rotation of a closing half shaft of the second circuit breaker when swinging downwards. The inter-cabinet transmission device is detachably arranged between the first cabinet body and the second cabinet body through the first opening and the second opening and comprises a first input crank arm, a first output crank arm in transmission connection with a first input crank arm shaft, a second input crank arm arranged opposite to the first input crank arm and a second output crank arm in transmission connection with the second input crank arm; the end part of a main shaft of the first circuit breaker is provided with a first main shaft output device, the first main shaft output device drives the first input crank arm to rotate when the main shaft of the first circuit breaker is switched on and rotates, and the first output crank arm drives the second locking device to act so as to lock a switching-on half shaft of the second circuit breaker; and a second main shaft output device is mounted at the end part of the main shaft of the second circuit breaker, the second main shaft output device drives a second input crank arm to rotate when the main shaft of the second circuit breaker is switched on and rotates, and the second output crank arm drives a first locking device to act so as to lock a switching-on half shaft of the first circuit breaker. Therefore, an inter-cabinet transmission device is arranged between the first cabinet body and the second cabinet body, the inter-cabinet transmission device realizes transmission with a main shaft of the first circuit breaker through the first main shaft output device, and a closing half shaft of the second circuit breaker is locked when the second circuit breaker is in a closing state through the second locking device, so that the second circuit breaker is prevented from performing closing operation under the condition that the first circuit breaker is closed; similarly, the transmission device between the cabinets realizes transmission through the second main shaft output device and the main shaft of the second circuit breaker, and the closing half shaft of the first circuit breaker is locked through the first locking device when the second circuit breaker is in a closing state, so that the first circuit breaker cannot be closed under the condition that the second circuit breaker is closed. Therefore, according to the circuit breaker closing device, when one circuit breaker is closed, the other circuit breaker is locked and cannot be closed by adopting the mode of locking the closing half shaft, and manual misoperation or forced operation closing is effectively prevented.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure.

Fig. 1 is a schematic structural diagram of a mechanical interlock system of a dual power switch cabinet according to an exemplary embodiment of the present disclosure.

Fig. 2 is a schematic structural diagram of a first switchgear of the present disclosure.

FIG. 3 is a partial schematic view of a mechanical interlock system of the present disclosure.

Fig. 4 is a schematic structural diagram of the transmission device between cabinets of the present disclosure.

Fig. 5 is a schematic structural view of a second circuit breaker and a second lockout device of the present disclosure.

Fig. 6 is a schematic structural view of a first circuit breaker and a first lockout device of the present disclosure.

Detailed Description

For further explanation of the principles and construction of the present disclosure, reference will now be made in detail to the preferred embodiments of the present disclosure, which are illustrated in the accompanying drawings.

The present disclosure provides a mechanical interlock system 100 of a dual power switch cabinet, the mechanical interlock system 100 includes a first switch cabinet 10, a second switch cabinet 20, and an inter-cabinet transmission 30 detachably installed between the first switch cabinet 10 and the second switch cabinet 20. The inter-cabinet transmission device 30 is used for performing switching-on and switching-off interlocking on the first switch cabinet 10 and the second switch cabinet 20, that is, under the interlocking action of the inter-cabinet transmission device 30, when the first switch cabinet 10 is in a switching-on power supply state, the second switch cabinet 20 is locked in a switching-off state, so that the switching-on operation is prevented; when the first switch cabinet 20 is in a closing power supply state, the first switch cabinet 10 is locked in a switching-off state, so that the switching-on operation is prevented; when one switch cabinet is in an opening state, the other switch cabinet is in an unlocking state, and closing operation can be executed.

Specifically, the first switch cabinet 10 includes a first cabinet 101 and a first circuit breaker 11 located in a circuit breaker chamber of the first cabinet 101. The second switchgear 20 includes a second cabinet 201 and a second circuit breaker 21 located in a circuit breaker chamber of the second cabinet 201. The interbank gear 30 is located on the respective sides of the two breaker chambers. The side surface is correspondingly provided with a first opening and a second opening. The inter-cabinet transmission device 30 is installed at the first opening of the first switch cabinet 10, so that a part of the structure is located in the first cabinet 101, and the other part of the structure extends into the second cabinet 201 through the second opening. Alternatively, the inter-cabinet transmission device 30 is installed at a second opening of the second switch cabinet 20, such that a part of the structure is located in the second cabinet 201, and another part of the structure extends into the first cabinet 101 through the first opening.

The first switchgear 10 is further provided with a first locking device 12, the first locking device 12 extending from the top of the rack of the first circuit breaker 11 to the inside of the rack for unlocking or limiting the rotation of the closing half shaft of the first circuit breaker 11. The first blocking device 12 can be actuated by the cabinet transmission 30.

The second switch cabinet 20 is further provided with a second locking device 22, and the second locking device 22 extends from the top of the frame of the second circuit breaker 21 to the inner side of the frame and is used for unlocking or limiting the rotation of the closing half shaft of the second circuit breaker 21. The second blocking device 22 can be actuated by the cabinet transmission 30.

As shown in fig. 2, fig. 2 is a schematic structural diagram of the first switch cabinet, and the first switch cabinet 10 further includes a first main shaft output device 13, and the first main shaft output device 13 is connected to a main shaft of the first circuit breaker 11 and the inter-cabinet transmission device 30. Therefore, when the main shaft of the first circuit breaker 11 of the first switch cabinet 10 is switched on and rotated, the first main shaft output device 13 is driven to rotate, the first main shaft output device 13 drives the inter-cabinet transmission device 30 to rotate, the inter-cabinet transmission device 30 drives the second locking device 22 of the second switch cabinet 20 to act, and the second locking device 22 locks the switching-on half shaft of the second circuit breaker 21 to limit the switching-on of the second circuit breaker 21.

Similarly, as shown in fig. 3, the second switch cabinet 20 also includes a second main shaft output device 23, and the second main shaft output device 23 is connected with a main shaft 24 of the second circuit breaker 21 and the inter-cabinet transmission device 30. Therefore, when the main shaft 24 of the second circuit breaker 21 of the second switch cabinet 20 performs closing rotation, the second main shaft output device 23 is driven to rotate, the second main shaft output device 23 drives the inter-cabinet transmission device 30 to rotate, the inter-cabinet transmission device 30 drives the first locking device 12 of the first switch cabinet 10 to act, and the first locking device 12 locks the closing half shaft of the first circuit breaker 11 to limit the first circuit breaker 11 to perform closing.

As shown in fig. 3 and 4, the interbank gear 30 is of modular construction. The modular structure 30 has two fixing portions 301, and the two fixing portions 301 are fixed on a cabinet body plate of one of the switch cabinets by bolts or screws. During the installation, whole modular structure installs on the lateral wall of one of them cabinet body of first cabinet body 101 and the second cabinet body 201 through two fixed part 301, this modular structure's partly is located one of them cabinet internally through first trompil, another part stretches into to another cabinet body in through the second trompil, therefore, set up the trompil on the lateral wall of the cabinet body, alright install this transmission between cabinet, simple installation, also need not extra installing support to fix on the cabinet body, the influence to cabinet body standardization that the change of the cabinet body part that the reduction goes on because of increasing mechanical interlocking brought, spare part changes for a short time, the commonality is good.

The modular structure realizes transmission with the main shaft 14 of the first circuit breaker 11 and the main shaft 24 of the second circuit breaker 21 respectively through the matching of the first roller and the second roller with the corresponding first main shaft output device 13 and the second main shaft output device 23. Specifically, one side surface of the inter-cabinet transmission device 30 is provided with a first roller 321, and when the main shaft 14 of the first circuit breaker rotates, the first main shaft output device 13 pushes the first roller 321 to swing, so that the rotation of the main shaft 14 of the first circuit breaker 11 is transmitted to the inter-cabinet transmission device 30; similarly, the other side of the inter-cabinet transmission 30 is provided with a second roller 341, and when the main shaft 24 of the second circuit breaker rotates, the second main shaft output device 23 pushes the second roller 341 to swing, so that the rotation of the main shaft 24 of the second circuit breaker 21 is transmitted to the inter-cabinet transmission 30.

The first spindle output device 13 includes: a connecting shaft unit 131 connected to the main shaft 14 of the first circuit breaker 11, and a driving plate 132 mounted on the connecting shaft unit 131, wherein the driving plate 132 rotates with the rotation of the main shaft 14 of the first circuit breaker 11, and when the main shaft 14 of the first circuit breaker 11 rotates in a closing direction, the driving plate 132 rotates and pushes the first roller 321 to rotate, thereby operating the first transmission assembly of the interbank transmission 30.

Similarly, the second spindle output device 23 has the same structure as the first spindle output device 13, and will not be described in detail herein.

The transmission device 30 between cabinets and the main shaft drive are in a non-fixed connection mode, namely, the first main shaft output device 13 and the second main shaft output device 23 are connected with the corresponding main shaft, and the first main shaft output device 13 and the second main shaft output device 23 drive the corresponding first roller 321 or second roller 341 to swing so as to finally realize the interlocking between the first switch cabinet and the second switch cabinet, so that the transmission error caused by the manufacturing error of the cabinet body is overcome, and the influence on the manufacturing process of the cabinet body and the assembling process of the on-site cabinet body caused by the precision problem is effectively solved; and the non-fixed connection mode makes the transmission of transmission 3 between the cabinets not influence the original performance of the circuit breaker.

The modular structure includes a module frame 31, a first transmission assembly 32 and a second transmission assembly 34 mounted on the module frame 31 and spaced apart from each other. The first transmission assembly 32 and the second transmission assembly 34 extend through each zone and are independent of each other.

The module frame 31 includes a plurality of longitudinal partitions divided into a plurality of regions by the respective longitudinal partitions, and as shown in fig. 4, the module frame 31 includes 5 longitudinal partitions, and the 5 longitudinal partitions divide the module frame 31 into 6 regions, which are a first region, a second region, a third region, a fourth region, a fifth region, and a sixth region, respectively. The components of the first transmission assembly 32 and the second transmission assembly 34 are located in different areas, so that the components can be independent from each other to avoid interference on one hand, and are fixed by the longitudinal partition plates on the other hand. The first transmission assembly 32 and the second transmission assembly 34 extend through each zone and are independent of each other.

The first transmission assembly 32 includes a first input crank arm 322, the first roller 321 mounted on the first input crank arm 322, a first input crank arm shaft 323 connected to the first input crank arm 322, a first link 324 hinged to the first input crank arm shaft 323, a first intermediate transition shaft 325 hinged to the first link 324, a first link lever 326 hinged to the first intermediate transition shaft 325, a first link shaft 327 hinged to the first link lever 326, and a first output crank arm 328 connected to the first link shaft 327. The first link 324, the first intermediate transition shaft 325 and the first link 326 form an inverted zigzag structure.

A first movement track groove 3221 for limiting a swing angle of the first input crank arm 322 is provided at an upper end of the first input crank arm 322. The first input crank arm 322 is coupled to the first link 3222 of the module frame 31 through the first motion track groove 3221, and can swing around the first link 3222. The first motion track groove 3221 defines a swing angle greater than a rotation angle required for closing the main shaft 14 of the first circuit breaker 11. The first motion track groove 3221 may be a kidney-shaped groove, and the swing angle defined by the kidney-shaped groove depends on the groove length of the kidney-shaped groove. The first movement track groove 3221 has at least two advantages, that is, on the one hand, when the first circuit breaker 11 is in the open state, the first input connecting lever 322 is limited to a position at the time of starting the movement by cooperating with a first reset spring 329 (described in detail below), and on the other hand, when the first circuit breaker 11 is closed, a swing angle or an arc of the first input connecting lever 322 is limited.

The first reset spring 329 is sleeved on the first input crank shaft 323 of the first transmission assembly 32, and has one end located at the side of the first connecting member 3222 and the other end fixed to the first connecting rod 326. The first connecting member 3222 may be a connecting screw. The first connecting member 322 has a limiting function on the first reset spring 329 in the resetting process, as shown in fig. 4, when the main shaft of the first circuit breaker 11 is switched on and rotates, the first input crank shaft 323 is driven to rotate clockwise, one end of the first reset spring 329 is far away from the first connecting member 3222, when the first circuit breaker 11 is switched off, the first reset spring 329 is reset to drive the first input crank shaft 323 to rotate counterclockwise, one end of the first reset spring 329 moves in the direction close to the first connecting member 3222, and when the first reset spring contacts the first connecting member 3222, the first reset spring is limited to move continuously, the first input crank shaft 323 does not rotate continuously any more, the original initial position is maintained, and the first input crank is also reset.

The first connecting rod 324 extends upwards from one end of the first input crank shaft 323, the first connecting rod 324 is a double-end connecting rod, one end of the double-end connecting rod is connected with the first input crank shaft 323, the other end of the double-end connecting rod is connected with the first middle transition shaft 325, and the middle length of the double-end connecting rod is adjustable.

The first intermediate transition axis 325 runs through the plurality of zones from left to right. A first connecting rod 326 extends upwardly from the first intermediate transition shaft 325 and is disposed parallel to the longitudinal partitions of the module frame 31. The first connecting shaft 327 is connected between two longitudinal partitions of the module frame 31. The first output crank arm 328 extends upward from the first connecting shaft 327, and has one end connected to the first connecting shaft 327 and the other end provided with a toggle shaft 3281, when the first output crank arm 328 swings, the toggle shaft 3281 toggles the second latch 22 to rotate or swing, so that the second latch 22 performs a latching operation.

The second transmission assembly 34 is similar to the first transmission assembly 32 in structure, and specifically, the second transmission assembly 34 includes a second input crank arm 342, the second roller 341 mounted on the second input crank arm 342, a second input crank arm shaft 343 connected to the second input crank arm 342, a second link 344 hinged to the second input crank arm shaft 343, a second intermediate transition shaft 345 hinged to the second link 344, a second connecting rod 346 hinged to the second intermediate transition shaft 345, a second connecting shaft 347 hinged to the second connecting rod 346, and a second output crank arm 348 connected to the second connecting shaft 347. The second link 344, the second intermediate transition shaft 345 and the second connecting rod 346 form an inverted Z-shaped structure.

The second roller 341 is connected to the lower end of the second input crank arm 342, and the second roller 341 is disposed perpendicular to the length direction of the second input crank arm 342, faces the second cabinet 201, and is coupled to the second spindle output device 23 of the second switch cabinet 20.

A second operation locus groove (not shown) for limiting a swing angle of the second input crank arm 342 is provided at an upper end of the second input crank arm 342. The second input crank arm 342 is engaged with and can swing around a second link on the module frame 31 through a second motion trajectory groove. The second movement track groove defines a swing angle larger than a rotation angle required for closing the main shaft 24 of the second circuit breaker 21. The second motion trajectory groove may be a kidney-shaped groove defining a swing angle depending on a groove length of the kidney-shaped groove. The second motion track groove has at least two advantages, on one hand, when the second circuit breaker 21 is in the open state, the second motion track groove cooperates with a second reset spring (described in detail below) to limit the position of the second input crank arm 342 at the time of starting the motion, and on the other hand, when the second circuit breaker 21 is in the close state, the second input crank arm 342 is limited in its swing angle or arc.

The second reset spring is sleeved on the second input crank arm shaft 343 of the second transmission assembly 34, and one end of the second reset spring is located at the side of the second connecting member, and the other end of the second reset spring is fixed on the second connecting rod 346, so as to enable the second input crank arm 342 to reset when the second circuit breaker 21 is opened. The second connecting piece has a limiting effect on the second reset spring in the resetting process.

The second connecting rod 344 extends upwards from one end of the second input crank shaft 343, the second connecting rod 344 is a double-head connecting rod, one end of the double-head connecting rod is connected with the second input crank shaft 343, the other end of the double-head connecting rod is connected with the second middle transition shaft 345, and the middle length of the double-head connecting rod is adjustable, so that when errors from theoretical design exist in the manufacturing and assembling processes of the first switch cabinet 10 and the second switch cabinet 20, the double-head connecting rod can be adjusted, errors from theoretical design caused by errors in the interlocking action are avoided, and the interlocking requirement is met.

The second intermediate transition axis 325 intersects the plurality of regions from right to left. A second connecting rod 346 extends upwardly from the second intermediate transition axis 345 and is disposed parallel to the longitudinal partitions of the module frame 31. The second connecting shaft 347 is connected between the two longitudinal partitions of the module frame 31. The second output crank arm 348 extends upward from the second connecting shaft 347, one end of the second output crank arm 348 is connected to the second connecting shaft 347, and the other end of the second output crank arm 348 is provided with a shifting shaft 3481, when the second output crank arm 348 swings, the shifting shaft 3481 shifts the first locking device 12 to rotate or swing, so that the first locking device 12 performs a locking operation.

Second input crank arm axis 343 is symmetrically disposed about the middle longitudinal partition 311 of module frame 31 with first input crank arm axis 323. The connection path formed by the components of the first transmission assembly 32 extends from below the first region (i.e., the region where the first input crank 322 is located) to above the sixth region (i.e., the region where the first output crank 328 is located) in a zigzag manner; the connection path formed by the components of the second transmission assembly 34 extends from below the sixth region to above the first region in a zigzag manner.

As shown in connection with fig. 3 and 5, the second latch 22 includes a second latch drive component and a second latch plate 224 drivingly connected to the first latch drive component. The second locking transmission component comprises a second locking input crank arm 221 driven by the first output crank arm 328 to swing, a second locking driving rod 222 which is positioned at the top of the rack of the second circuit breaker 21 and is used for being sleeved with the second locking input crank arm 221, and a second locking input connecting rod 223 which is connected with the second locking driving rod 222 and extends into the rack of the second circuit breaker 21, one end of the second locking plate 224 is fixed on the inner side of the rack of the second circuit breaker 21, and the other end of the second locking plate is connected with the second locking input connecting rod 223 and can swing up and down under the driving of the second locking input connecting rod 223.

The second latch input crank arm 221 has a collar that is sleeved on the second latch driving rod 222. The second latching driving lever 222 is disposed along a length direction of the frame of the circuit breaker 21, and both ends thereof are fixed by a second fixing base 225. Specifically, the second locking device 22 further includes the second fixing base 225, a second limiting member 226 fixed on the second fixing base 225, and a second locking limiting plate 227 installed on the second locking driving rod 222 and capable of rotating with the second locking driving rod 222.

The second holder 225 is zigzag-shaped, that is, the second holder 225 includes an upper transverse portion, a middle vertical portion, and a lower transverse portion. The second limiting member 226 is mounted on the upper transverse portion of the second fixing base 225. The lower transverse portion is mounted on top of the frame of the second circuit breaker 21. The middle vertical portion is provided with an opening through which the second latch driving lever 222 passes.

The number of the second limiting members 226 may be two, and the two second limiting members 226 are disposed at intervals, so that two ends of the second locking limiting plate 227 are limited by the different second limiting members 226 respectively. The two position-limiting members 226 may be screws. One end of the screw penetrates through the upper transverse portion of the second fixing seat 225 and is located above the second locking limit plate 227.

The second locking limit plate 227 is fixed to the second locking driving rod 222 by a fastener such as a bolt or a screw, and is located below the upper lateral portion of the second fixing base 225. The second limiting member 226 is located on the rotation path of the second locking limiting plate 227, and when the second locking limiting plate 227 rotates to a predetermined angle, the second limiting member 226 limits the second locking limiting plate to be unable to rotate continuously, so as to limit the rotation angle of the second locking driving rod 222 and prevent the second locking driving rod 222 from rotating excessively.

The second latch gear assembly further includes a second latch return spring 228 between the second latch limit plate 227 and the second anchor 225. The second latching return spring 228 is sleeved on the second latching driving rod 222, one end of the second latching return spring is connected to one end of the second latching limiting plate 227, the other end of the second latching return spring is a free end, and is limited below the second limiting screw 229, the second limiting screw 229 is fixed on the second fixing seat 225, and the second latching return spring 228 drives the second latching driving rod 222 to reset when the first circuit breaker 11 is opened.

As shown in fig. 5, when the second latch driving lever 222 rotates counterclockwise, the second latch limiting plate 227 rotates counterclockwise along with the second latch driving lever 222, when the second latch driving lever 222 rotates by a predetermined angle, that is, when the main shaft of the first circuit breaker 11 rotates to the on position, one end of the second latch limiting plate 227 is blocked by the second limiting member 226 and cannot rotate further, when the main shaft of the first circuit breaker 11 is opened, the second latch driving lever 222 rotates clockwise under the action of the second latch return spring 228 to be reset, and when the second latch driving lever 222 rotates to the initial position, the other end of the second latch limiting plate 227 is blocked by the other second limiting member 226, so that the second latch driving lever 222 is maintained at the initial position.

The second latch input link 223 is connected to the second latch driving lever 222 by a bolt or a screw. The second lock input link 223 includes two links, that is, the size of the angle between the two links varies with the rotation of the second lock input link 223. The second latch plate 224 is driven to move downward when the angle between the two links increases, and the second latch plate 224 is driven to move upward when the angle between the two links decreases.

One end of the second latch plate 224 is fixed to an inner wall of the housing, and the other end is swingable up and down with the second latch input link 223 with respect to the fixed end. When the second locking plate 224 moves down, the second closing half-shaft crank arm 25 is blocked, and the second closing half-shaft crank arm 25 is mounted on the closing half-shaft 26 of the second circuit breaker 21, so that the closing half-shaft 26 of the second circuit breaker 21 cannot perform a closing operation. The closing half shaft 26 is a rotating shaft of the operating mechanism. Therefore, when the first breaker 11 is in the closed state, the closing half shaft 26 of the second breaker 21 is locked, and the closing operation is disabled. Therefore, the mode of locking the switching-on half shaft is adopted, so that when one circuit breaker is switched on, the other circuit breaker is locked and can not be switched on, and manual misoperation or manual forced switching-on is effectively prevented.

In addition, after the transmission device 30 between the cabinets is installed, the circuit breakers are not influenced when being in working positions or testing positions, namely, the two circuit breakers can be simultaneously in the working positions, the spare power automatic switching can be realized, and the hot standby state requirement of the circuit breakers can be met.

Similarly, as shown in fig. 3 and 6, the frame of the first circuit breaker 11 of the first switchgear 10 is also provided with a first blocking device 12 cooperating with the second transmission assembly 34. The first latch mechanism 12 includes a first latch drive component and a first latch plate 124 drivingly connected to the first latch drive component. The first locking transmission assembly comprises a first locking input crank arm 121 driven by the second output crank arm to swing, a first locking driving rod 122 located at the top of the rack of the first circuit breaker and used for being sleeved with the first locking input crank arm, and a first locking input connecting rod 123 connected with the first locking driving rod 122 and extending into the rack of the second circuit breaker. One end of the first latching plate 124 is fixed inside the rack of the first circuit breaker, and the other end is connected to the first latching input link 123 and can swing up and down under the driving of the first latching input link 123. When the first locking plate 124 moves down, the first closing half-shaft crank arm 15 is blocked, and the first closing half-shaft crank arm 15 is mounted on the closing half-shaft 16 of the first circuit breaker 11, so that the closing half-shaft 16 of the first circuit breaker 11 cannot perform a closing operation. The closing half shaft 16 is a rotating shaft of the operating mechanism. Therefore, when the second breaker 21 is in the closed state, the closing half shaft 16 of the first breaker 11 is locked, and the closing operation is disabled.

The first locking transmission assembly further includes a first fixing base 125, a first limiting member 126 fixed on the first fixing base 125, and a first locking limiting plate 127 installed on the first locking driving rod 122 and capable of rotating along with the first locking driving rod 122, wherein the first limiting member 126 is located on a rotation path of the first locking limiting plate 127, and when the first locking limiting plate 127 rotates to a predetermined angle, the first locking limiting plate is limited by the first limiting member 126 and cannot rotate continuously, so as to limit a rotation angle of the first locking driving rod 122.

The first latching transmission assembly further includes a first latching return spring 128 located between the first latching limiting plate 127 and the first fixing seat 122, one end of the first latching return spring 128 is connected to the first latching limiting plate 127, the other end of the first latching return spring is located below the first limiting screw, the first limiting screw is fixed on the first fixing seat 125, and the first latching return spring 128 urges the first latching driving rod 122 to reset when the second circuit breaker is opened.

The first latch mechanism 12 may be formed of the same components as the second latch mechanism 22 to achieve the same functions, and therefore, will not be described in detail.

In summary, in the present disclosure, the mechanical interlocking between the first switch cabinet 10 and the second switch cabinet 20 is realized through the inter-cabinet transmission device 30, when the breaker of any switch cabinet is switched on, the switching-on half shaft of the breaker of the other switch cabinet is locked and cannot be switched on; when the breaker of one switch cabinet is in an open state, the breaker of the other switch cabinet can be closed. And the two switch cabinets meet the requirement of spare power automatic switching, namely, under the condition that one breaker does not work, the other breaker can be automatically put into use.

The above description is only for the purpose of illustrating the preferred embodiments of the present disclosure and is not to be construed as limiting the scope of the present disclosure, but rather is intended to cover all equivalent structural changes made by applying the teachings of the present disclosure to the accompanying drawings.

Claims

1. A mechanical interlock system of a dual power switch cabinet, comprising:

2. The mechanical interlock system of a dual power switch cabinet according to claim 1, wherein the inter-cabinet transmission is of modular construction.

3. The mechanical interlock system of a dual power switch cabinet according to claim 2, wherein the modular structure comprises a module frame, a first transmission assembly and a second transmission assembly mounted on the module frame separately from each other;

4. The mechanical interlock system of a dual-power switch cabinet according to claim 3,

the first transmission component comprises the first input crank arm, a first roller arranged on the first input crank arm, a first input crank arm shaft connected with the first input crank arm, a first connecting rod hinged with the first input crank arm shaft, a first middle transition shaft hinged with the first connecting rod, a first connecting rod hinged with the first middle transition shaft, a first connecting shaft hinged with the first connecting rod and a first output crank arm connected with the first connecting shaft, the first link extends upwardly from one end of the first input bell crank shaft, the first intermediate transition shaft traverses the module frame, the first connecting rod extends upwards from the first intermediate transition shaft, so that the first connecting rod, the first intermediate transition shaft and the first connecting rod form an inverted Z-shaped structure, the first spindle output device drives the first input crank arm to rotate by shifting the first roller;

5. The mechanical interlock system of a dual-power switch cabinet according to claim 4,

the module frame comprises five longitudinal partition plates which are divided into six regions, namely a first region to a sixth region, the second input crank shaft and the first input crank shaft are symmetrically arranged relative to the middle longitudinal partition plate of the module frame, a connecting path formed by all parts of the first transmission assembly extends from the lower part of the first region to the upper part of the sixth region in a Z shape, and a connecting path formed by all parts of the second transmission assembly extends from the lower part of the sixth region to the upper part of the first region in a Z shape.

6. The mechanical interlock system of a dual-power switch cabinet according to claim 4, wherein the first link and the second link are both: the double-end connecting rod, the length of double-end connecting rod can be adjusted.

7. The mechanical interlocking system of the dual-power switch cabinet as recited in claim 3, wherein a first motion track groove for limiting a swing angle of the first input connecting lever is arranged at an upper end of the first input connecting lever, the first input connecting lever is matched with a first connecting piece on the module frame through the first motion track groove and can swing around the first connecting piece, and a swing angle defined by the first motion track groove is larger than a rotation angle required for closing a main shaft of a first circuit breaker;

8. The mechanical interlocking system of the dual-power switch cabinet as claimed in claim 7, wherein the first transmission assembly is further provided with a first reset spring, the first reset spring is sleeved on the first input crank shaft of the first transmission assembly, one end of the first reset spring is positioned at the side part of the first connecting piece, the other end of the first reset spring is fixed on the first connecting rod of the inter-cabinet transmission device, and when the first breaker is opened, the first input crank is enabled to reset;

9. The mechanical interlock system of a dual-power switch cabinet according to claim 1,

the first locking transmission component comprises a first locking input crank arm driven by the second output crank arm to swing, a first locking driving rod which is positioned at the top of the rack of the first circuit breaker and is used for being sleeved with the first locking input crank arm, and a first locking input connecting rod which is connected with the first locking driving rod and extends into the rack of the second circuit breaker, one end of the first locking plate is fixed on the inner side of the rack of the first circuit breaker, and the other end of the first locking plate is connected with the first locking input connecting rod and can swing up and down under the driving of the first locking input connecting rod;

10. The mechanical interlock system of a dual-power switch cabinet according to claim 9,

the first locking transmission assembly further comprises a first fixed seat, a first limiting part fixed on the first fixed seat and a first locking limiting plate which is installed on the first locking driving rod and can rotate along with the first locking driving rod, the first limiting part is located on a rotating path of the first locking limiting plate, and when the first locking limiting plate rotates to a preset angle, the first locking limiting plate cannot rotate continuously under the limitation of the first limiting part so as to limit the rotating angle of the first locking driving rod;

11. The mechanical interlock system of a dual-power switch cabinet according to claim 10,

the first locking transmission assembly further comprises a first locking reset spring positioned between the first locking limiting plate and the first fixed seat, one end of the first locking reset spring is connected to the first locking limiting plate, the other end of the first locking reset spring is positioned below a first limiting screw, the first limiting screw is fixed on the first fixed seat, and the first locking reset spring enables the first locking driving rod to reset when the second circuit breaker is opened;

the second shutting transmission assembly is further located including the cover on the second shutting actuating lever and be located the second shutting limiting plate with the second shutting reset spring of second fixing base, the one end of second shutting reset spring connect in the second shutting limiting plate, the other end is located the below of second stop screw, the second stop screw is fixed in on the second fixing base, the second shutting reset spring is in during first circuit breaker separating brake, make the second shutting actuating lever realizes reseing.

12. The mechanical interlock system of a dual-power switch cabinet according to claim 1, wherein the first and second spindle outputs each comprise: the circuit breaker comprises a connecting shaft device connected with a main shaft of a corresponding circuit breaker and a driving plate installed on the connecting shaft device.