CN220651855U - Combined switch electrical appliance interlocking device and combined switch electrical appliance thereof - Google Patents

Abstract

The utility model discloses a combined switch electrical appliance interlocking device and a combined switch electrical appliance thereof, comprising a breaker shaft, a disconnecting switch shaft and a grounding switch shaft which are respectively arranged on an inner mounting plate in a rotating way, wherein a first interlocking structure is connected between the disconnecting switch shaft and the breaker shaft, a second interlocking structure is arranged between the disconnecting switch shaft and the grounding switch shaft, the first interlocking structure comprises a first stop piece which is movably arranged between a first limit plate and a second limit plate, the second interlocking structure comprises a second stop piece which is movably arranged between a third limit plate and a fourth limit plate, and the first interlocking structure and the second interlocking structure which are designed by adopting the technical scheme respectively realize the interlocking among the breaker, the disconnecting switch and the grounding switch, really realize mechanical locking, ensure that the combined switch electrical appliance performs related operation according to the correct operation sequence, avoid the harm caused by misoperation, thereby meeting the related regulations of five-prevention interlocking and improving the use safety of products.

Description

Combined switch electrical appliance interlocking device and combined switch electrical appliance thereof

Technical Field

The utility model relates to the technical field of power supply and distribution, in particular to a combined switch electrical appliance interlocking device and a combined switch electrical appliance.

Background

Along with the continuous development of national economy, stricter requirements are put forward on the electric energy quality and the operation reliability of a power grid line, a combined switch electrical appliance is required to be frequently used in the current power supply and distribution line, and the current combined switch electrical appliance mainly comprises operating elements such as a vacuum circuit breaker, a disconnecting switch, a grounding switch and the like and is used for on-off, control or protection in the power generation, the power transmission, the power distribution, the electric energy conversion and the consumption of a power system. In the operation and maintenance process of the combined switch electrical appliance, serious safety accidents may be caused by irregular operation, for ensuring the safe operation of the power network, ensuring the safety of equipment and personnel and preventing misoperation, the power industry stipulates that the high-low voltage switch equipment needs to meet the five-prevention interlocking requirement of safe operation, namely: the circuit breaker is prevented from being opened or closed by mistake; the on-load pulling and closing of the isolating switch are prevented; the ground switch is prevented from being connected by mistake in a charged state; preventing the circuit breaker from being closed with the grounding wire; preventing erroneous entry into the charging gap.

According to the five-prevention interlocking rule, the basic requirement for the combined switch electrical appliance is that when power is transmitted, the breaker can be switched on only after the switch-on and switch-off of the isolating/grounding switch is completely in place; and when the power is off, the isolating/grounding switch can be operated only after the breaker is opened. In actual operation, the interlocking fit among the breaker, the isolating switch and the wiring switch in the combined switch electrical appliance adopts a blocking piece mode with a multi-connecting-rod structure, so that the breaker, the isolating switch and the wiring switch drive corresponding blocking pieces to act during opening and closing operations, and the blocking pieces are utilized to respectively and correspondingly cover the breaker operation hole, the isolating operation hole and the grounding operation hole on the operation mechanism so as to realize interlocking, thereby blocking the handle from extending out of the corresponding operation hole to operate the breaker or the isolating switch or the grounding switch, and further meeting other interlocking requirements that the isolating switch cannot be misoperation when the breaker is closed. However, the following problems still exist in practice in the interlocking manner of the combined switch device: 1. the blocking piece is interlocked by adopting a transmission mode of a multi-connecting-rod structure, the components and the connecting fulcrums are more, the generated inertia force is not easy to balance, frequent adjustment and maintenance are needed, the blocking piece is easy to damage when exposed out of the mechanism frame, and the overall transmission reliability is poor; 2. although the handle can be limited to conduct manual closing operation on the circuit breaker through the baffle interlocking mode, electric closing of the circuit breaker cannot be limited, and potential safety hazards of misoperation exist.

Disclosure of Invention

Therefore, the technical problem to be solved by the utility model is to overcome the problems that the combined switch electrical appliance in the prior art adopts a baffle plate in a multi-link mode to shade and realize interlocking of operation holes, and has more components and connecting fulcrums, complex overall structure and poor interlocking reliability, thereby providing the combined switch electrical appliance interlocking device and the combined switch electrical appliance thereof, which have the advantages of reducing the connecting fulcrums, having simple overall structure, meeting the relevant regulations of five-prevention interlocking and improving the use safety and reliability.

In order to solve the technical problems, the utility model provides a combined switch electrical appliance interlocking device, which comprises a breaker shaft, a disconnecting switch shaft and a grounding switch shaft which are respectively arranged on a mechanism bracket in a rotating way, wherein a first interlocking structure is connected between the disconnecting switch shaft and the breaker shaft, a second interlocking structure is connected between the disconnecting switch shaft and the grounding switch shaft, and the first interlocking structure comprises a first limiting disc which is arranged on the disconnecting switch shaft in a linkage way, a second limiting disc which is arranged on the breaker shaft in a linkage way, and a first stop piece which is movably arranged between the first limiting disc and the second limiting disc;

The second interlocking structure comprises a third limiting disc, a fourth limiting disc and a second stop piece, the third limiting disc is arranged on the isolating switch shaft in an interlocking mode, the fourth limiting disc is arranged on the grounding switch shaft in an interlocking mode, and the second stop piece is movably arranged between the third limiting disc and the fourth limiting disc;

when the isolating switch shaft is at the opening position, the first stop piece is driven by the first limit disc to form limit fit with the second limit disc so as to limit the rotation of the breaker shaft; a free space for the second stop piece to move is formed between the third limit disc and the fourth limit disc;

when the isolating switch shaft is at a closing position, the second stop piece is driven by the third limit disc to form limit fit with the fourth limit disc so as to limit the rotation of the grounding switch shaft; and a free space for the first stop piece to move is formed between the first limit disc and the second limit disc.

The first interlocking structure comprises a first limiting component which is arranged between the isolating switch shaft and the breaker shaft and used for guiding the first stop piece to do linear reciprocating movement;

the second interlocking structure comprises a second limiting assembly which is arranged between the isolating switch shaft and the grounding switch shaft and used for guiding a second stop piece to do linear reciprocating movement;

The moving direction of the first stop piece and the moving direction of the second stop piece are intersected with the isolating switch shaft and are arranged in an included angle.

In the above combined switch electrical apparatus interlocking device, the first limiting assembly comprises a middle limiting plate and a first limiting plate which are sleeved on the isolating switch shaft and the breaker shaft in parallel, and a group of first guide holes which are arranged on the first limiting plate and the middle limiting plate in a corresponding extending manner along the length direction of the first limiting plate, and a first guide shaft which is connected in the first guide holes in a sliding manner is arranged on the first stop piece.

In the combined switch electrical appliance interlocking device, the first stop piece is a circular roller, one stop piece is arranged between the middle stop plate and the first stop plate, a first stop groove matched with the circular roller is formed in the circular arc convex edge of the first stop disc, and a second stop groove matched with the roller structure is formed in the circular arc convex edge of the second stop disc; the first limiting disc pushes the first stop piece to be blocked in the second limiting groove to limit the rotation of the breaker shaft when the isolating switch shaft is switched off, and is separated from the first stop piece and forms a free space for the first stop piece to move when the isolating switch shaft is switched on so as to release the rotation limitation of the breaker shaft; the second limiting disc pushes the first stop piece to be blocked in the first limiting groove to limit the rotation of the isolating switch shaft when the breaker shaft is switched on, and is separated from the first stop piece when the breaker shaft is switched off, and a free space for the first stop piece to move is formed, so that the rotation limit of the isolating switch shaft is relieved.

In the interlocking device of the combined switch electrical appliance, the second limiting assembly comprises the middle limiting plate which is arranged in parallel with the inner mounting plate of the shell frame, and the second limiting plate which is movably arranged between the middle limiting plate and the inner mounting plate along the moving direction of the second limiting piece, wherein two second limiting pieces are connected in the arc grooves at two ends of the second limiting plate, the interlocking device further comprises two groups of second guide holes which are oppositely arranged on the middle limiting plate and the inner mounting plate and correspond to the two second limiting pieces, and two groups of second guide shafts which are respectively arranged on the two second limiting pieces and correspond to the two groups of second guide holes in a sliding mode, and the two second limiting pieces are respectively connected with the third limiting plate and the fourth limiting plate.

In the above-mentioned combined switch electrical apparatus interlock, the second limiting plate includes two bar slide holes that extend along its length direction and set up, be connected with two reference columns that pass two bar slide holes respectively between middle limiting plate and the interior mounting panel, two sets of second guiding holes and bar slide hole syntropy extend and set up, first limiting plate and second limiting plate divide to locate the both sides of middle limiting plate.

In the above-mentioned combination switch electrical apparatus interlock, the second spacing subassembly includes that parallel cover is located spacing board in the middle of isolating switch axle and the ground connection switch epaxial and second limiting plate, and set up relatively at least a set of second guiding hole on second limiting plate and the middle limiting plate, the length direction extension setting distance of second limiting plate is followed to the second guiding hole, second arresting member passes through second guiding axle sliding connection in the second guiding hole, and be provided with a plurality ofly along the second guiding hole link to each other in proper order between middle limiting plate and the second limiting plate.

In the combined switch electrical appliance interlocking device, the second stop piece is a circular roller, a third limit groove matched with the circular roller is formed in the circular arc convex edge of the third limit disc, and a fourth limit groove matched with the roller structure is formed in the circular arc convex edge of the fourth limit disc; the third limiting disc pushes the second stop piece to be blocked in the fourth limiting groove to limit the rotation of the grounding switch shaft when the isolating switch shaft is switched on, and is separated from the second stop piece when the isolating switch shaft is switched off, and a free space for the second stop piece to move is formed to release the rotation limitation of the grounding switch shaft; the fourth limiting disc pushes the second stopping piece to be blocked in the third limiting groove to limit the rotation of the isolating switch shaft when the grounding switch shaft is switched on, and is separated from the second stopping piece when the grounding switch shaft is switched off, and a free space for the second stopping piece to move is formed, so that the rotation limit of the isolating switch shaft is relieved.

In the combined switch electrical appliance interlocking device, the mechanism support is rotatably provided with the closing half shaft for triggering the energy storage mechanism to release energy storage so as to drive the breaker shaft to automatically close, and a third interlocking structure for limiting the closing half shaft to rotate when the isolating switch shaft is separated is arranged between the closing half shaft and the isolating switch shaft.

In the above-mentioned combination switch electrical apparatus interlock, the third interlock structure includes:

the driving rod is arranged on the isolating switch shaft in a linkage way;

the locking hook piece is rotatably arranged on the mechanism bracket through a rotating shaft and comprises a trigger end which extends to be positioned on the rotating path of the driving rod and a limit end which extends to the position of the closing semiaxle relative to the trigger end;

the reset tension spring is connected between the mechanism support and the lock hook member and applies elastic force for driving the limiting end to rotate towards one side far away from the closing half shaft to the lock hook member;

the driving rod pushes the trigger end when the isolating switch shaft is disconnected, so as to drive the lock hook member to drive the limit end to rotate and then form limit fit with the closing half shaft;

the driving rod is far away from the trigger end when the isolating switch shaft is switched on, so that the lock hook member drives the limit end to rotate under the action of elastic force and then is in limit fit with the switching-on semi-axis.

In the combined switch electrical appliance interlocking device, the driving rod is fixed on the isolating switch shaft through the fixing sleeve, the end part of the isolating switch shaft is provided with the isolating and separating and combining indicating disc fixedly connected with the driving rod, and the inner mounting plate is provided with the isolating and limiting shaft and the grounding limiting shaft which are respectively positioned on the rotating paths of the third limiting disc and the fourth limiting disc.

The utility model also provides a combined switch electrical appliance, which comprises a breaker, a disconnecting switch and a grounding switch which are arranged on the stand, and the combined switch electrical appliance interlocking device of any one of the above, wherein the combined switch electrical appliance interlocking device is arranged in an operating mechanism on the side surface of the stand.

Compared with the prior art, the technical scheme of the utility model has the following advantages:

1. according to the combined switch electrical appliance interlocking device, the first interlocking structure is connected between the disconnecting switch shaft and the circuit breaker shaft, and the second interlocking structure is connected between the disconnecting switch shaft and the grounding switch shaft, when the disconnecting switch shaft is in a disconnecting position, the first limit disc and the third limit disc are respectively driven to rotate for a certain angle, the first limit disc drives the first stop piece to be in limit fit with the second limit disc, so that the circuit breaker shaft cannot be switched on and rotated due to the fact that the second limit disc is limited, the circuit breaker is prevented from conducting error switching-on operation when the disconnecting switch is disconnected, the grounding switch shaft at the moment can be switched on and off freely in an unlocking state, and power transmission is guaranteed to be achieved according to the operation sequence of disconnecting switch, disconnecting switch switching-on and finally switching-on of the circuit breaker; when the isolating switch shaft is in a closing position, the second stop piece is driven by the third limit disc to form limit fit with the fourth limit disc, so that the grounding switch shaft cannot be closed and rotated due to the fact that the fourth limit disc is blocked by limit, the grounding switch is prevented from being electrified to close a grounding knife, the circuit breaker shaft at the moment can be opened and closed freely, the power failure is guaranteed to be realized according to the operation sequence of opening the circuit breaker, opening the isolating switch and closing the grounding switch finally, so that the maintenance is facilitated, the first interlocking structure and the second interlocking structure designed by the technical scheme are adopted to realize the interlocking effect among the circuit breaker, the isolating switch and the grounding switch respectively, the mechanical locking is truly realized, the combined switch electrical appliance is guaranteed to be operated according to a preset operation sequence, the harm caused by misoperation is avoided, the relevant regulation of five-prevention interlocking is met, and the safety and the reliability of the use of the combined switch electrical appliance are improved.

2. According to the combined switch electrical appliance interlocking device, the middle limiting plate and the first limiting plate are sleeved on the isolating switch shaft and the breaker shaft in parallel, and a group of first guide holes are formed in the first limiting plate and the middle limiting plate in a opposite mode, so that the first stopping piece is connected in the first guide holes in a sliding mode through the first guide shafts, the first stopping piece is movably arranged between the first limiting plate and the middle limiting plate through the matching of the first guide holes and the first guide shafts, meanwhile, the first stopping piece is subjected to a movement guiding effect, so that the first stopping piece is prevented from being subjected to a position deviation phenomenon in the moving process, the first stopping piece is ensured to reliably and accurately transfer movement between the first limiting plate and the second limiting plate, and when the isolating switch shaft is opened, the first stopping piece is enabled to form limit fit with the second limiting plate under the driving of the first limiting plate, and thus the breaker shaft is subjected to limit locking; when the breaker shaft is switched on, the first stop piece can be in limit fit with the first limit plate under the drive of the second limit plate, so that the isolating switch shaft is subjected to limit locking, and the interlocking purpose between the isolating switch shaft and the breaker shaft is achieved.

3. In the interlocking device of the combined switch electrical appliance, the second limiting plate is movably arranged between the middle limiting plate and the inner mounting plate, two second stopping pieces are connected to two ends of the second limiting plate and are slidably connected into second guiding holes which are oppositely arranged between the middle limiting plate and the inner mounting plate through second guiding shafts, the second stopping pieces are guided in a movement manner through the cooperation of the second guiding holes and the second guiding shafts, and the second limiting plates are connected between the two second stopping pieces to increase the connecting distance, so that the two second stopping pieces are respectively matched with the third driving disc and the fourth driving disc to realize the interlocking function, and when the third driving disc drives one of the second stopping pieces to move, the other second stopping piece is in limiting fit with the fourth limiting disc after being pushed, so that the limiting locking effect is achieved on the grounding switch shaft; and when the fourth driving disk drives one of the second stop pieces to move, the other second stop piece is pushed to form limit fit with the third limit disk, so that the limit locking effect on the disconnecting switch shaft is achieved, and the interlocking purpose between the disconnecting switch shaft and the circuit breaker shaft is achieved.

4. According to the interlocking device of the combined switch electrical appliance, the first stop piece and the second stop piece are designed by adopting the circular rollers, and the first limit groove to the fourth limit groove which are in the circular arc shape are correspondingly arranged on the first limit disk to the fourth limit disk respectively, so that the circular rollers can roll and displace when being impacted by the circular arc convex edges of the limit disks, the friction resistance is reduced, the transmission efficiency is high, and meanwhile, the circular rollers can be propped against the circular rollers through the circular arc-shaped limit grooves to form limit fit.

5. According to the combined switch electrical appliance interlocking device, the third interlocking structure is arranged between the isolating switch and the closing half shaft, the driving rod pushes the trigger end of the lock hook member when the isolating switch shaft is separated, so that the lock hook member drives the limit end to rotate and then form limit fit with the closing half shaft, the closing half shaft has limit locking effect, the circuit breaker cannot perform electric closing operation through the closing half shaft, only when the isolating switch shaft is separated, the driving rod is separated from the lock hook member, the lock hook member drives the limit end to rotate away from the closing half shaft under the action of the reset tension spring, and therefore limit fit between the lock hook member and the closing half shaft is relieved, and the circuit breaker can achieve electric closing operation through the closing half shaft after energy storage is completed. The advantage of this structural design can prevent the electronic combined floodgate of circuit breaker when isolator separating brake through third interlocking structure, cooperates first interlocking structure simultaneously and can prevent the manual combined floodgate of circuit breaker to realize the interlocking requirement between isolator and the circuit breaker, and carry out the relevant operation of combination switch electrical apparatus according to correct operation order, prevent that the maloperation from leading to unnecessary risk, use safe and reliable.

6. In the combined switch electrical appliance provided by the utility model, the interlocking of the circuit breaker, the isolating switch and the grounding switch is realized through the interlocking device, when power transmission operation is carried out, the grounding switch is firstly separated, then the isolating switch is closed, and finally the circuit breaker can be opened and closed, so that the isolating switch is prevented from being closed before the grounding switch is not connected, or the grounding switch is prevented from being closed before the isolating switch is not connected; in addition, when the power-off or maintenance operation is carried out, the circuit breaker is firstly disconnected, the isolating switch is separated, and finally the grounding switch can be separated and combined, and the process prevents the isolating switch from opening and closing under load, so that the combined switch electric appliance meets the safety operation specification of five-prevention interlocking, and is safe and reliable.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below.

Fig. 1 is a schematic diagram of a three-dimensional structure of an interlocking device of a combined switch electric appliance provided by the utility model;

fig. 2 is a schematic structural diagram of the interlocking device of the combined switch electrical apparatus of the present utility model when the isolating switch shaft is in a closed state;

FIG. 3 is a schematic diagram of a third interlock structure of the present utility model when the disconnector shaft is in a closed position;

FIG. 4 is a schematic diagram of the interlocking device of the combined switch apparatus of the present utility model when the disconnecting switch shaft is in the open state;

FIG. 5 is a schematic view of the third interlock structure of the present utility model when the disconnector shaft is in the open position;

fig. 6 is a side view of the interlocking device of the combined switch electric appliance of the present utility model

FIG. 7 is a schematic structural view of a first interlocking structure of the present utility model;

FIG. 8 is a schematic structural view of a second interlocking structure of the present utility model;

fig. 9 is a schematic diagram of a three-dimensional structure of a combined switch device provided by the utility model;

fig. 10 is a schematic plan view of a combined switch device according to the present utility model;

reference numerals illustrate: 1. a breaker shaft; 2. isolating the switch shaft; 3. a grounding switch shaft; 4. a first interlocking structure; 41. a first limit plate; 411. a first limit groove; 42. the second limiting disc; 421. the second limit groove; 43. a first stopper; 44. a first limiting plate; 45. a first guide hole; 46. a first guide shaft; 5. a second interlocking structure; 51. the third limiting disc; 511. a third limit groove; 52. a fourth limiting disc; 521. a fourth limit groove; 53. a second stopper; 54. a second limiting plate; 55. a second guide hole; 56. a second guide shaft; 57. positioning columns; 58. a bar-shaped slide hole; 6. an intermediate limiting plate; 7. an inner mounting plate; 71. isolating the limiting shaft; 72. a grounding limiting shaft; 8. a mechanism bracket; 81. closing a half shaft; 9. a third interlocking structure; 91. a latch hook member; 911. a trigger end; 912. a limiting end; 92. a driving rod; 93. resetting the tension spring; 94. isolating the separating and combining indicating disc; 101. a circuit breaker; 102. an isolating switch; 103. a grounding switch; 104. an operating mechanism.

Detailed Description

The following description of the embodiments of the present utility model will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the utility model are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the description of the present utility model, it should be noted that the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

In addition, the technical features of the different embodiments of the present utility model described below may be combined with each other as long as they do not collide with each other.

Example 1

The present embodiment is specifically described below with reference to the accompanying drawings:

the embodiment provides a combined switch electrical appliance interlocking device as shown in fig. 1-8, which comprises a breaker shaft 1, a disconnecting switch shaft 2 and a grounding switch shaft 3 which are respectively arranged on a mechanism bracket 8 in a rotating way, wherein a first interlocking structure 4 is connected between the disconnecting switch shaft 2 and the breaker shaft 1, a second interlocking structure 5 is connected between the disconnecting switch shaft 2 and the grounding switch shaft 3, the combined switch electrical appliance mainly comprises a vacuum breaker, a disconnecting switch and a grounding switch, and the breaker shaft 1, the disconnecting switch shaft 2 and the grounding switch shaft 3 respectively drive the vacuum breaker, the disconnecting switch and the grounding switch to realize switching-on or switching-off operation when in a switching-on or switching-off position, wherein the first interlocking structure 4 comprises a first limiting disc 41 which is arranged on the disconnecting switch shaft 2 in a linkage way, a second limiting disc 42 which is arranged on the breaker shaft 1 in a linkage way, and a first stop piece 43 which is movably arranged between the first limiting disc 41 and the second limiting disc 42; the second interlocking structure 5 comprises a third limiting disc 51 which is arranged on the isolating switch shaft 2 in a linkage manner, a fourth limiting disc 52 which is arranged on the grounding switch shaft 3 in a linkage manner, and a second stop piece 53 which is movably arranged between the third limiting disc 51 and the fourth limiting disc 52.

Referring to fig. 2, when the disconnecting switch shaft 2 is in the disconnecting position, the first stop member 43 is driven by the first limit plate 41 to form a limit fit with the second limit plate 42 so as to limit the rotation of the circuit breaker shaft 1, the circuit breaker is in a disconnecting state and cannot perform a closing operation, and a free space for the second stop member 53 to move is formed between the third limit plate 51 and the fourth limit plate 52, that is, the grounding switch is not limited by interlocking and can perform a closing and opening operation, so as to play a role in preventing the electrified grounding knife from being electrified.

Referring to fig. 4, when the disconnecting switch shaft 2 is in the closing position, the third limiting disc 51 drives the second stopper 53 and the fourth limiting disc 52 to form a limiting fit to limit the rotation of the grounding switch shaft 3, the grounding switch at this time is in a disconnecting state and cannot perform a closing operation, and a free space for the first stopper 43 to move is formed between the first limiting disc 41 and the second limiting disc 42, that is, the circuit breaker is not limited by interlocking and can perform a closing and opening operation, so as to play a role in preventing the closing with a ground knife.

In the above embodiment, the first interlocking structure 4 is connected between the disconnecting switch shaft 2 and the circuit breaker shaft 1, and the second interlocking structure 5 is connected between the disconnecting switch shaft 2 and the grounding switch shaft 3, when the disconnecting switch shaft 2 is in the disconnecting position, the first limiting disc 41 and the third limiting disc 51 are respectively driven to rotate by a certain angle, the first limiting disc 41 drives the first stopper 43 and the second limiting disc 42 to form a limiting fit, so that the circuit breaker shaft 1 cannot be switched on and rotated due to the fact that the second limiting disc 42 is limited, and the circuit breaker is prevented from performing an error switching-on operation when the disconnecting switch is disconnected, and the grounding switch shaft 3 at the moment can be switched on and off freely in an unlocking state, so that power transmission is ensured to be realized according to the operation sequence of disconnecting switch disconnection, disconnecting switch switching-on and finally circuit breaker switching-on; when the disconnecting switch shaft 2 is in a closing position, the second stop piece 53 is driven by the third limit disc 51 to form limit fit with the fourth limit disc 52, so that the grounding switch shaft 3 cannot be closed and rotated due to limit blocking of the fourth limit disc 52, the grounding switch is prevented from being electrified to close a grounding knife, the breaker shaft 1 at the moment is in an unlocking state and can be freely opened and closed, the power failure is ensured to be realized according to the operation sequence of opening the breaker, opening the disconnecting switch and closing the grounding switch finally so as to be convenient for maintenance, the first interlocking structure and the second interlocking structure designed by the technical scheme are adopted to realize the interlocking action among the breaker, the disconnecting switch and the grounding switch respectively, the mechanical locking is truly realized, the combined switch appliance is ensured to be operated according to a preset operation sequence, the harm caused by misoperation is avoided, the related regulation of five-prevention interlocking is further met, and the use safety and reliability of the combined switch appliance are improved.

Further preferably, the first interlocking structure 4 includes a first limiting component disposed between the disconnecting switch shaft 2 and the circuit breaker shaft 1 and used for guiding the first stopper 43 to reciprocate linearly, correspondingly, the second interlocking structure 5 includes a second limiting component disposed between the disconnecting switch shaft 2 and the grounding switch shaft 3 and used for guiding the second stopper 53 to reciprocate linearly, and the first limiting component and the second limiting component are used for limiting and guiding the movement of the first stopper 43 and the movement of the second stopper 53 respectively, so that the movement direction of the first stopper 43 and the movement direction of the second stopper 53 intersect with each other on the disconnecting switch shaft 2 and are disposed at an included angle.

The specific arrangement of the first interlocking structure and the second interlocking structure is described in detail below with reference to fig. 2-8:

the first limiting assembly comprises an intermediate limiting plate 6 and a first limiting plate 44 which are sleeved on the isolating switch shaft 2 and the breaker shaft 1 in parallel, and a group of first guide holes 45 which are arranged on the first limiting plate 44 and the intermediate limiting plate 6 in a corresponding extending mode along the length direction of the first limiting plate 44, and a first guide shaft 46 which is connected in the first guide holes 45 in a sliding mode is arranged on the first stopping piece 43, the first stopping piece 43 is a circular roller and is arranged between the intermediate limiting plate 6 and the first limiting plate 44, a first limiting groove 411 which is matched with the circular roller is arranged on the circular arc convex edge of the first limiting plate 41, a second limiting groove 421 which is matched with the roller structure is arranged on the circular arc convex edge of the second limiting plate 42, the first limiting groove 411 and the second limiting groove 421 are of a circular arc groove structure, the structure is arranged, the first stopping piece 43 is movably arranged between the first limiting plate 44 and the intermediate plate 6 through the matching of the first guide holes 45 and the first guide shaft 46, and the first stopping piece 43 can be prevented from moving accurately in the first stopping piece 43 and the first limiting plate 41, and the first stopping piece is prevented from moving accurately moving in the first stopping piece 43. Two locking modes of the first interlocking structure are described below: according to the interlocking requirement that the breaker cannot be turned on or off by mistake when the isolating switch is turned off, the first limiting disc 41 pushes the first limiting piece 43 to be blocked in the second limiting groove 421 when the isolating switch shaft 2 is turned off, and the second limiting disc 42 is limited and blocked by the first limiting piece 43 and cannot rotate due to the fact that the first limiting disc 41 always pushes the first limiting piece 43 to exert pressure, so that the locking of the breaker shaft 1 is achieved, the first limiting disc 41 is driven to be separated from the first limiting piece 43 only when the isolating switch shaft 2 is turned on, the pressure acting on the first limiting piece is removed, a free space for the first limiting piece to move is reserved, and the second limiting disc 42 can be driven to push the circular roller through rotating the breaker shaft 1, so that the unlocking of the breaker shaft 1 is achieved. Similarly, according to the interlocking requirement that the second limiting disc 42 cannot be separated from the switch by mistake when the circuit breaker is switched on, the second limiting disc 42 pushes the first limiting disc 43 to be blocked in the first limiting groove 411 when the circuit breaker shaft 1 is switched on, so that the first limiting disc is limited and blocked by the first limiting disc and cannot rotate, the disconnecting switch shaft 2 is locked, the disconnecting switch is prevented from being separated by mistake when the circuit breaker shaft is switched off, the second limiting disc 42 is driven to be separated from the first limiting disc 43, a free space for the first limiting disc to move is reserved, the first limiting disc 41 can be driven to push the first limiting disc 43 open by rotating the disconnecting switch shaft 2, and the disconnecting switch shaft 2 is unlocked. The first interlocking structure is designed to achieve the purpose of interlocking between the disconnecting switch shaft and the breaker shaft.

As shown in fig. 6-8, the second limiting assembly comprises an intermediate limiting plate 6 arranged in parallel with the inner mounting plate 7 of the shell frame, and a second limiting plate 54 movably arranged between the intermediate limiting plate 6 and the inner mounting plate 7 along the moving direction of the second stopping piece 53, two second stopping pieces 53 are connected in arc grooves at two ends of the second limiting plate 54, two groups of second guiding holes 55 corresponding to the two second stopping pieces 53 and oppositely arranged on the intermediate limiting plate 6 and the inner mounting plate 7, two groups of second guiding shafts 56 respectively arranged on the two second stopping pieces 53 and correspondingly connected in the two groups of second guiding holes 55 in a sliding manner, the two second stopping pieces 53 are respectively connected with a third limiting plate 51 and a fourth limiting plate 52 and are arranged as a specific structure, the second limiting plate 54 comprises two strip-shaped sliding holes 58 extending along the length direction of the second limiting plate 54, two positioning posts 57 respectively penetrating through the two sliding holes 58 are connected between the intermediate limiting plate 6 and the inner mounting plate 7, the two groups of second guiding shafts 56 are respectively arranged on the two second limiting plates 53 and the two groups of second guiding shafts 55 and the second limiting plate 55 are respectively connected with the third limiting plate 51 and the fourth limiting plate 52, and the two limiting plates are arranged as a common limiting assembly, and the cost is reduced, and the cost of the two limiting assembly is reduced. In this embodiment, the two second stoppers 53 are circular rollers, a third limiting groove 511 matched with the circular rollers is provided on the circular arc convex edge of the third limiting disc 51, a fourth limiting groove 521 matched with a roller structure is provided on the circular arc convex edge of the fourth limiting disc 52, and the circular rollers can roll and displace when being impacted by the circular arc convex edge of the limiting disc, thereby being beneficial to reducing friction resistance, having high transmission efficiency, and being capable of propping against the circular rollers through the circular arc-shaped limiting groove to form limiting fit. With this structural arrangement, the second stopper 53 is guided in movement between the intermediate limiting plate 6 and the inner mounting plate 7 by the cooperation of the second guide holes 55 and the second guide shafts 56, and the second limiting plate 54 is connected between the two second stoppers 53 to increase the connection distance due to the relatively long distance between the disconnecting switch shaft and the grounding switch shaft, so that the two second stoppers 53 cooperate with the third driving plate 51 and the fourth driving plate 52, respectively, to achieve the interlocking function.

The following describes two locking modes of the second interlocking structure 5, namely, according to the interlocking requirement that the grounding switch cannot be charged and mistakenly closed when the isolating switch is closed, the third limiting disc 51 pushes the two second stopping pieces 53 and the second limiting plate 54 to move when the isolating switch shaft 2 is closed, so that one second stopping piece 53 is blocked in the fourth limiting groove 521, and as the third limiting disc 51 always pushes the two second stopping pieces 53 to exert pressure on the third limiting disc 51, the fourth limiting disc 52 is limited and blocked by the second stopping pieces 53 and cannot rotate, locking of the grounding switch shaft 3 is achieved, the third limiting disc 51 is driven to be separated from the second stopping pieces 53 only when the isolating switch shaft 2 is opened, namely, the pressure acting on the second stopping pieces is removed, a free space for the two second stopping pieces 53 to move is reserved, and the fourth limiting disc 52 can be driven to push the second stopping pieces 53 open by rotating the grounding switch shaft 3, so that unlocking of the grounding switch shaft 3 is achieved. Similarly, according to the interlocking requirement that the disconnecting switch cannot be mistakenly closed when the grounding switch is closed, the fourth limiting disc 52 pushes the two second stop pieces 53 and the second limiting plate 54 to move when the grounding switch shaft 3 is closed, one of the second stop pieces 53 is blocked in the first limiting slot 411, the third limiting disc 51 is limited and blocked by the second stop piece 53 and cannot rotate, so that the disconnecting switch shaft is locked, the disconnecting switch and the circuit breaker are prevented from being mistakenly closed by a grounding knife, the fourth limiting disc 52 is driven to be separated from the second stop piece 53 only when the grounding switch shaft 3 is opened, a free space for the second stop piece to move is reserved, and the third limiting disc 51 can be driven to push the second stop piece 53 by rotating the disconnecting switch shaft 2, so that the disconnecting switch shaft 2 is unlocked. The second interlocking structure is designed to achieve the purpose of interlocking between the isolating switch shaft and the grounding switch shaft.

As an alternative embodiment of the second limiting assembly, the second limiting plate 54 is fixedly connected between the isolating switch shaft 2 and the grounding switch shaft 3, the second limiting assembly includes an intermediate limiting plate 6 and a second limiting plate 54 sleeved on the isolating switch shaft 2 and the grounding switch shaft 3 in parallel, and at least one set of second guiding holes 55 oppositely arranged on the second limiting plate 54 and the intermediate limiting plate 6, the second guiding holes 55 extend for a set distance along the length direction of the second limiting plate 54, and the second stoppers 53 are slidably connected in the second guiding holes 55 through the second guiding shafts 56, and are sequentially connected between the intermediate limiting plate 6 and the second limiting plate 54 along the second guiding holes 55. In the structure, the plurality of second stopping pieces are connected to meet the requirement of the connection distance between the third limiting disc 51 and the fourth limiting disc 52, so that the plurality of second stopping pieces 53 are driven by the third limiting disc 51 to move close to the fourth limiting disc 52 and form limiting fit with the fourth limiting disc, and the locking of the grounding switch shaft 3 is realized; on the contrary, the second stoppers 53 are driven by the fourth limiting plate 52 to move close to the third limiting plate 51 and form a limiting fit with the fourth limiting plate 52, so as to lock the isolating switch shaft 2. Those skilled in the art can make a selection on the setting manner of the second limiting component according to the above description, and other equivalent embodiments will not be described herein.

In this embodiment, as shown in fig. 1, the circuit breaker needs to store energy through an energy storage mechanism in an operating mechanism before closing, the energy storage mechanism is connected with a circuit breaker shaft 1, in order to realize the electric opening and closing operation of the circuit breaker, a closing half shaft 81 for triggering the energy storage mechanism to release energy to drive the circuit breaker shaft 1 to automatically close is rotatably arranged on a mechanism bracket 8, a third interlocking structure 9 for limiting the rotation of the closing half shaft 81 when the isolating switch shaft 2 is opened is arranged between the closing half shaft 81 and the isolating switch shaft 2, and the interlocking fit is realized by the third interlocking structure 9 for electric closing of the circuit breaker.

The specific arrangement of the third interlocking structure is described in detail below with reference to fig. 2-5:

the third interlocking structure 9 comprises a driving rod 92, a latch hook piece 91 and a reset tension spring 93, wherein the driving rod 92 is arranged on the isolating switch shaft 2 in a linkage way; the latch hook 91 is rotatably disposed on the mechanism bracket 8 through a rotating shaft, and includes a trigger end 911 extending along a rotation path of the driving rod 92, and a limit end 912 extending toward the position of the closing half shaft 81 relative to the trigger end 911; the return tension spring 93 is connected between the mechanism support 8 and the latch hook member 91, and applies an elastic force to the latch hook member to drive the limiting end 912 to rotate toward a side far away from the closing half shaft 81. According to the structure, the third interlocking structure 9 is arranged between the isolating switch and the closing half shaft 81, the driving rod 92 pushes the trigger end 911 of the lock hook member 91 when the isolating switch shaft 2 is separated, the lock hook member 91 drives the limit end 912 to rotate and then form limit fit with the closing half shaft 81, so that the closing half shaft 81 plays a role in limit locking, the circuit breaker cannot perform electric closing operation through the closing half shaft 81, and only when the isolating switch shaft 2 is closed, the driving rod 92 rotates along with the isolating switch shaft 2 and is far away from the trigger end 911, the lock hook member 91 drives the limit end 912 to rotate towards the side far from the closing half shaft 81 under the action of the reset tension spring 93, namely, the limit end is not located on the rotating path of the closing half shaft, and therefore limit fit between the lock hook member 91 and the closing half shaft 81 is released, and the circuit breaker can achieve electric closing operation through the closing half shaft 81 after energy storage is completed. The advantage of this structural design can prevent the electronic combined floodgate of circuit breaker when isolator separating brake through third interlocking structure 9, cooperates first interlocking structure simultaneously and can prevent the manual combined floodgate of circuit breaker to realize the interlocking requirement between isolator and the circuit breaker, and carry out the relevant operation of combination switch apparatus according to correct operation order, prevent that the maloperation from leading to unnecessary risk, use safe and reliable.

As shown in fig. 1, the driving rod 92 is mounted on the isolating switch shaft 2 through a fixing sleeve, an isolating switch-on/off indicating disc 94 fixedly connected with the driving rod 92 is disposed at the end of the isolating switch shaft 2, the isolating switch-on/off indicating disc 94 is used for indicating the switch-on state and the switch-off state of the isolating switch, so that a user can observe the working state of the isolating switch conveniently, wherein the isolating limit shaft 71 and the grounding limit shaft 72 respectively located on the rotating paths of the third limit disc 51 and the fourth limit disc 52 are disposed on the inner mounting plate 7, and the rotating angles of the third limit disc 51 and the fourth limit disc 52 are respectively limited through the isolating limit shaft 71 and the grounding limit shaft 72.

Example 2

The embodiment discloses a combined switch electrical apparatus, referring to fig. 9-10, which comprises a circuit breaker 101, a disconnecting switch 102, a grounding switch 103, and the combined switch electrical apparatus interlocking device in embodiment 1, wherein the interlocking device of the combined switch electrical apparatus is arranged on an operating mechanism 104 on the side surface of the rack, and the circuit breaker is a vacuum circuit breaker.

The combined switch electrical apparatus with the structural design is provided with the interlocking device, so that the combined switch electrical apparatus naturally has all advantages brought by the arrangement of the interlocking device, and the interlocking of the circuit breaker 101, the disconnecting switch 102 and the grounding switch 103 is realized through the first interlocking structure, the second interlocking structure and the third interlocking structure. When the combined switch electric appliance is in power transmission operation, the grounding switch 103 is firstly separated, the isolating switch 102 is closed, and the circuit breaker 101 can be opened and closed finally, so that the isolating switch is prevented from being closed before the grounding switch is not connected, or the grounding switch is prevented from being closed before the isolating switch is not connected; in addition, when the power-off or maintenance operation is performed, the circuit breaker 101 is firstly disconnected, the isolating switch 102 is separated, and finally the grounding switch 103 can be separated and combined, and the process prevents the isolating switch from opening and closing under load, so that the combined switch electric appliance meets the safety operation rule of five-prevention interlocking, and is safe and reliable.

It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. While still being apparent from variations or modifications that may be made by those skilled in the art are within the scope of the utility model.

Claims (12)

1. The utility model provides a combination switch electrical apparatus interlock, includes circuit breaker axle (1), isolator axle (2) and the ground connection switch axle (3) of rotating setting on mechanism's support (8) respectively, isolator axle (2) with be connected with first interlocking structure (4) between circuit breaker axle (1), be connected with second interlocking structure (5) between isolator axle (2) and the ground connection switch axle (3), its characterized in that:

the first interlocking structure (4) comprises a first limiting disc (41) which is arranged on the isolating switch shaft (2) in a linkage way, a second limiting disc (42) which is arranged on the circuit breaker shaft (1) in a linkage way, and a first stop piece (43) which is movably arranged between the first limiting disc (41) and the second limiting disc (42);

the second interlocking structure (5) comprises a third limiting disc (51) which is arranged on the isolating switch shaft (2) in a linkage way, a fourth limiting disc (52) which is arranged on the grounding switch shaft (3) in a linkage way, and a second stop piece (53) which is movably arranged between the third limiting disc (51) and the fourth limiting disc (52);

When the disconnecting switch shaft (2) is at a disconnecting position, the first stop piece (43) is driven by the first limit disc (41) to form limit fit with the second limit disc (42) so as to limit the rotation of the breaker shaft (1); and a free space for the second stopper (53) to move is formed between the third limit plate (51) and the fourth limit plate (52);

when the isolating switch shaft (2) is in a closing position, the third limiting disc (51) drives the second stop piece (53) to form limiting fit with the fourth limiting disc (52) so as to limit the rotation of the grounding switch shaft (3); and a free space for the first stopper (43) to move is formed between the first stopper plate (41) and the second stopper plate (42).

2. The combination switch electrical equipment interlocking device according to claim 1, wherein:

the first interlocking structure (4) comprises a first limiting component which is arranged between the disconnecting switch shaft (2) and the breaker shaft (1) and is used for guiding the first stop piece (43) to do linear reciprocating movement;

the second interlocking structure (5) comprises a second limiting component which is arranged between the isolating switch shaft (2) and the grounding switch shaft (3) and used for guiding a second stop piece (53) to do linear reciprocating movement;

the moving direction of the first stop piece (43) and the moving direction of the second stop piece (53) are intersected with each other on the isolating switch shaft (2) and are arranged at an included angle.

3. The combination switch electrical equipment interlocking device according to claim 2, wherein: the first limiting assembly comprises a middle limiting plate (6) and a first limiting plate (44) which are sleeved on the isolating switch shaft (2) and the breaker shaft (1) in parallel, and a group of first guide holes (45) which are arranged on the first limiting plate (44) and the middle limiting plate (6) in a corresponding extending mode along the length direction of the first limiting plate (44), and a first guide shaft (46) which is connected with the first guide holes (45) in a sliding mode is arranged on the first stop piece (43).

4. A combination switch electrical appliance interlocking device as claimed in claim 3 wherein: the first stop piece (43) is a round roller, one stop piece is arranged between the middle stop plate (6) and the first stop plate (44), a first stop groove (411) matched with the round roller is formed in the arc convex edge of the first stop plate (41), and a second stop groove (421) matched with the roller structure is formed in the arc convex edge of the second stop plate (42); the first limiting disc (41) pushes the first stop piece (43) to be blocked in the second limiting groove (421) to limit the rotation of the breaker shaft (1) when the disconnecting switch shaft (2) is disconnected, and is separated from the first stop piece (43) to release the rotation limitation of the breaker shaft (1) when the disconnecting switch shaft (2) is closed; the second limiting disc (42) pushes the first stop piece (43) to be blocked in the first limiting groove (411) to limit the rotation of the isolating switch shaft (2) when the breaker shaft (1) is switched on, and is separated from the first stop piece (43) to release the rotation limitation of the isolating switch shaft (2) when the breaker shaft (1) is switched off.

5. A combination switch electrical appliance interlocking device as claimed in claim 3 wherein: the second limiting assembly comprises an intermediate limiting plate (6) which is arranged in parallel with an inner mounting plate (7) of the shell frame, a second limiting plate (54) which is movably arranged between the intermediate limiting plate (6) and the inner mounting plate (7) along the moving direction of a second stopping piece (53), two second stopping pieces (53) which are connected in arc grooves at two ends of the second limiting plate (54), two groups of second guiding holes (55) which are oppositely arranged on the intermediate limiting plate (6) and the inner mounting plate (7) and correspond to the two second stopping pieces (53), two groups of second guiding shafts (56) which are respectively arranged on the two second stopping pieces (53) and are correspondingly connected in the two groups of second guiding holes (55) in a sliding mode, and the two second stopping pieces (53) are respectively connected with a third limiting disc (51) and a fourth limiting disc (52).

6. The combination switch electrical equipment interlocking device according to claim 5, wherein: the second limiting plate (54) comprises two strip-shaped sliding holes (58) extending along the length direction of the second limiting plate, two positioning columns (57) penetrating through the two strip-shaped sliding holes (58) respectively are connected between the middle limiting plate (6) and the inner mounting plate (7), the two groups of second guiding holes (55) and the strip-shaped sliding holes (58) extend in the same direction, and the first limiting plate (44) and the second limiting plate (54) are respectively arranged on two sides of the middle limiting plate (6).

7. The combination switch electrical equipment interlocking device according to claim 2, wherein: the second limiting assembly comprises a middle limiting plate (6) and a second limiting plate (54) which are sleeved on the isolating switch shaft (2) and the grounding switch shaft (3) in parallel, and at least one group of second guide holes (55) which are oppositely arranged on the second limiting plate (54) and the middle limiting plate (6), wherein the second guide holes (55) extend for a set distance along the length direction of the second limiting plate (54), and the second stopping piece (53) is connected in the second guide holes (55) in a sliding manner through a second guide shaft (56), and a plurality of second guide holes (55) are sequentially connected between the middle limiting plate (6) and the second limiting plate (54).

8. The combination switch electrical equipment interlocking device according to any one of claims 5 to 7, wherein: the second stop piece (53) is a circular roller, a third limit groove (511) matched with the circular roller is formed in the circular arc convex edge of the third limit disc (51), and a fourth limit groove (521) matched with the roller structure is formed in the circular arc convex edge of the fourth limit disc (52); the third limiting disc (51) pushes the second stop piece (53) to be blocked in the fourth limiting groove (521) to limit the rotation of the grounding switch shaft (3) when the isolating switch shaft (2) is switched on, and is separated from the second stop piece (53) to release the rotation limit of the grounding switch shaft (3) when the isolating switch shaft (2) is switched off; the fourth limiting disc (52) pushes the second stop piece (53) to be blocked in the third limiting groove (511) to limit the rotation of the isolating switch shaft (2) when the grounding switch shaft (3) is switched on, and is separated from the second stop piece (53) to release the rotation limit of the isolating switch shaft (2) when the grounding switch shaft (3) is switched off.

9. The combination switch electrical equipment interlocking device according to claim 1, wherein: the automatic switching-on mechanism is characterized in that a switching-on half shaft (81) for triggering an energy storage mechanism to release energy storage so as to drive the breaker shaft (1) to automatically switch on is rotatably arranged on the mechanism support (8), and a third interlocking structure (9) for limiting the switching-on half shaft (81) to rotate when the isolating switch shaft (2) is switched off is arranged between the switching-on half shaft (81) and the isolating switch shaft (2).

10. The combination switch electrical equipment interlocking device according to claim 9, wherein: the third interlock structure (9) includes:

a driving rod (92) which is arranged on the isolating switch shaft (2) in a linkage way;

the lock hook piece (91) is rotatably arranged on the mechanism bracket (8) through a rotating shaft and comprises a trigger end (911) which extends to be positioned on the rotating path of the driving rod (92) and a limit end (912) which extends to the position of the closing half shaft (81) relative to the trigger end (911);

the reset tension spring (93) is connected between the mechanism bracket (8) and the lock hook (91) and applies elastic force for driving the limiting end (912) to rotate towards the side far away from the closing half shaft (81) to the lock hook (91);

the driving rod (92) pushes the trigger end (911) when the isolating switch shaft (2) is disconnected so as to drive the lock hook (91) to drive the limit end (912) to rotate and then form limit fit with the closing half shaft (81);

The driving rod (92) is away from the trigger end (911) when the isolating switch shaft (2) is switched on, so that the lock hook member (91) drives the limit end (912) to rotate under the action of elastic force and then is in limit fit with the switching-on half shaft (81).

11. The combination switch electrical equipment interlocking device according to claim 10, wherein: the drive rod (92) is installed on the isolating switch shaft (2) through a fixed sleeve, the end part of the isolating switch shaft (2) is provided with an isolating and separating and combining indicating disc (94) fixedly connected with the drive rod (92), and the inner mounting plate (7) is provided with an isolating and limiting shaft (71) and a grounding limiting shaft (72) which are respectively positioned on the rotating paths of the third limiting disc (51) and the fourth limiting disc (52).

12. A combined switch electrical apparatus is characterized in that: the combined switch electrical appliance interlocking device comprises a circuit breaker (101), a disconnecting switch (102) and a grounding switch (103) which are arranged on a rack, and the combined switch electrical appliance interlocking device is arranged in an operating mechanism (104) on the side surface of the rack.