CN212209388U - Five-prevention interlocking structure and circuit breaker thereof - Google Patents

Abstract

The utility model discloses a five-prevention interlocking structure and a circuit breaker thereof, wherein the five-prevention interlocking structure comprises a panel and an interlocking plate arranged on the back of the panel, a first circuit breaker operation hole, a first isolating switch operation hole and a first grounding switch operation hole are arranged on the panel in sequence, and a second circuit breaker operation hole, a second isolating switch operation hole and a second grounding switch operation hole are arranged on the interlocking plate in sequence; the interlocking plate can slide relative to the panel and has A, B, C, D four relative positions; the breaker is provided with a breaker switch, an isolating switch and a grounding switch in the second breaker operation hole, the second isolating switch operation hole and the second grounding switch operation hole respectively and correspondingly; the utility model discloses a structure can inject the operation mode under a certain state through mechanical interlocking to avoid the loss that people's operation negligence leads to.

Description

Five-prevention interlocking structure and circuit breaker thereof

Technical Field

The utility model relates to a circuit breaker technical field especially relates to a five prevent interlocking structure and circuit breaker thereof.

Background

At present, in the global design of wind-powered electricity generation, in order to guarantee the security of operation, protection equipment and operating personnel's safety need possess five and prevent: the circuit breaker is prevented from being switched off and switched on by mistake, the isolating switch is prevented from being switched off and switched on by load, the grounding wire (grounding switch) is prevented from being hung (switched on) by electrification, the electrification of the grounding wire is prevented from being electrified, and the electrification interval is prevented from being mistakenly switched in.

For example, in a five-prevention interlocking structure disclosed in patent document CN 205248143U, when a circuit needs to be overhauled and disconnected, an operating handle rotates counterclockwise to drive a first connecting rod to rotate counterclockwise, an isolating switch and a grounding switch are actuated through a linkage rod, and a second rotating shaft is driven to rotate counterclockwise through a synchronous belt, so that a chuck moves rightward; according to different cabinet types, one end of the interlocking line with corresponding specification and size is clamped on an upper clamp of a mechanism spacing closing and separating limiting interlocking plate through a sharp-nose clamp, and the other end of the interlocking line is clamped on a lower clamp of the spacing closing and separating limiting interlocking plate through the sharp-nose clamp. When the earthing switch is operated to be in a closing state, the isolation closing limiting interlocking plate is abutted against the isolation closing operation shaft, the isolation closing cannot be operated, meanwhile, the lower door plate interlocking avoidance hole is in the same position with the lower door plate snap spring of the grounding operation hole blocking piece, and the lower door plate can be taken down, so that the earthing closing state and the non-closing isolating switch are formed. According to different cabinet types, one end of a linkage line with corresponding specification and size is clamped on a grounding operation hole baffle clamping head by a sharp mouth clamp, and a grounding operation hole baffle penetrating through the other end of the linkage line is linked with a lower clamping head and is fastened on a grounding operation hole baffle linkage frame by a screw; when the door plate is installed, the lower door plate clamp hole is buckled on the lower door plate clamp spring of the grounding operation hole blocking piece, the lower door plate pulling interlocking line is pressed downwards, the interlocking line pulling blocking piece of the clamping head is clamped under the interlocking of the grounding operation hole blocking piece, the grounding operation hole is enabled to be in an operable state, when the door plate is taken down, the interlocking line is loosened, the blocking piece blocks the operation hole, the operation handle cannot be inserted into the grounding switch operation hole, the isolating switch cannot be closed when the lower door plate chamber is used for installing a cable, so that the cable installation is absolutely safe, however, the interlocking line structure is adopted, the installation and the use are relatively inconvenient, the risk of interlocking line separation exists, the safety and the reliability of the use cannot be guaranteed, the interlocking of each step cannot be realized, and the loss caused by operator operation negligence cannot be effectively avoided.

At present, the safety operation is more and more important, and different from the former way mainly relying on the active consciousness operation of the operator, the five-prevention interlocking is used for limiting and protecting the operator and preventing the loss caused by the operation negligence, so that a five-prevention interlocking structure which can be mechanically interlocked, is simple and convenient to operate and is safe and reliable to use needs to be researched.

Disclosure of Invention

The utility model aims at providing a five prevent interlocking structure and circuit breaker thereof to solve the problem that above-mentioned prior art exists, can inject the operation mode under a certain state through mechanical interlocking, in order to avoid the loss that people's operation negligence leads to.

In order to achieve the above object, the utility model provides a following scheme: the utility model provides a five-prevention interlocking structure, which comprises a panel and an interlocking plate arranged on the back of the panel, wherein a first breaker operation hole, a first isolating switch operation hole and a first grounding switch operation hole are sequentially arranged on the panel, and a second breaker operation hole, a second isolating switch operation hole and a second grounding switch operation hole are sequentially arranged on the interlocking plate; the interlock plate is slidable relative to the face plate and has A, B, C, D four relative positions, in the A position, the centers of the holes coincide; when the position B is located, the centers of the first grounding switch operation hole and the second grounding switch operation hole are overlapped, and the centers of other holes are not overlapped; when the position C is located, the centers of the first isolating switch operation hole and the second isolating switch operation hole are overlapped, and the centers of other holes are not overlapped; when D position, first circuit breaker handle hole and the coincidence of second circuit breaker handle hole center, other holes all are not the coincidence of center.

Preferably, the panel is provided with a locking pin moving hole, the locking plate is provided with an interlocking pin hole, the locking pin hole is rotatably provided with a locking pin, and the interlocking pin can slide in the interlocking pin moving hole.

Preferably, the locking pin moving hole is long-strip-shaped, and four circular hole enlarging positions are sequentially arranged, and the four circular hole enlarging positions respectively correspond to A, B, C, D.

Preferably, the section of the moving part of the interlocking pin in the interlocking pin moving hole is long-strip-shaped, and the interlocking pin can be limited at the circular hole expanding position after rotating.

Preferably, a first isolating operation disc pin moving hole and a first grounding operation disc pin moving hole are respectively formed in one side of the first isolating switch operation hole and one side of the first grounding switch operation hole, wherein the first isolating operation disc pin moving hole is a section of arc-shaped hole with the center of the first isolating switch operation hole as the center of a circle, and the first grounding operation disc pin moving hole is a section of arc-shaped hole with the center of the first grounding switch operation hole as the center of a circle; a second isolating operation disc pin moving hole and a second grounding operation disc pin moving hole are respectively formed in one side of the second isolating switch operation hole and one side of the second grounding switch operation hole, wherein the second isolating operation disc pin moving hole is a section of arc-shaped hole with the center of the second isolating switch operation hole as the circle center, and the second grounding operation disc pin moving hole is a section of arc-shaped hole with the center of the second grounding switch operation hole as the circle center; when the centers of the first isolating switch operation hole and the second isolating switch operation hole are overlapped, the centers of the first isolating operation disc pin movement hole and the second isolating operation disc pin movement hole are overlapped; when the centers of the first grounding switch operation hole and the second grounding switch operation hole coincide, the center of the first grounding operation disc pin movement hole coincides with the center of the second grounding operation disc pin movement hole.

Preferably, the same ends of the second isolating operation disc pin movement hole and the second grounding operation disc pin movement hole extend with a section of long-strip-shaped hole in opposite directions, and the other ends of the second isolating operation disc pin movement hole and the second grounding operation disc pin movement hole extend with a section of long-strip-shaped hole in opposite directions.

The utility model also provides a circuit breaker, second circuit breaker handle hole, second isolator handle hole and second earthing switch handle hole correspond respectively and are provided with circuit breaker, isolator and earthing switch.

Preferably, an isolation operation shaft and an operation disc are sequentially arranged between the isolation switch and the second isolation switch operation hole; a grounding operation shaft and an operation disc are sequentially arranged between the grounding switch and the second grounding switch operation hole; the operating disc comprises a disc, a disc pin arranged at the top of the disc far away from the center of the circle and a strip-shaped bulge protruding from the bottom of the center of the disc; the disc center is provided with the shaft hole, when shaft hole and second isolator handle hole or second earthing switch handle hole center coincide, the disc round pin can pass second isolator handle disc round pin motion hole or second earthing handle disc round pin motion hole.

Preferably, the disc pins on the isolating operating disc and the grounding operating disc do not protrude out of the outer surface of the panel.

Preferably, the circuit breaker further comprises an electromagnetic lock capable of locking the position of the locking pin.

The utility model discloses for prior art gain following technological effect:

1. through the cooperation of the interlocking plate and the panel, the operation of an operator can be realized only step by step according to the steps, only the current step can be done in a certain step, and the next step of operation can be carried out after the operation of one step is finished, so that the safety protection of the operation is realized;

2. the A, B, C, D four operating positions are correspondingly arranged on the panel, so that the working state of the circuit breaker can be visually determined, and the operation is simple and convenient;

3. the arrangement mode that a section of long hole extends from the second isolating operation disc pin movement hole and the second grounding operation disc pin movement hole can be matched with disc pins on the isolating operation disc and the grounding operation disc, so that the isolating operation disc or the grounding operation disc can be fixed in a linkage mode after the relative positions of the panel and the linkage plate are changed, and the condition that one switch cannot be operated, namely mechanical linkage is realized, so that the operation is safer and more reliable, and misoperation caused by negligence is avoided;

4. the breaker switch, the disconnecting switch and the grounding switch are arranged in a mode of not protruding out of the outer surface of the panel, so that the switches cannot be directly operated and can be operated by tools, and the possibility of misoperation is further reduced;

5. through setting up the electromagnetic lock, in the power supply operation, rely on the position of electromagnetic lock locking interlocking round pin promptly the relative position of panel and interlocking board to further improvement interlocking security, reliability.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic view of the overall structure of the circuit breaker;

FIG. 2 is a schematic structural diagram of a panel;

FIG. 3 is a schematic structural view of the interlock plate;

FIG. 4 is a schematic view of the structure of the operating disk;

FIG. 5 is a state diagram of the interlocking pin in the A position;

FIG. 6 is a state diagram of the interlocking pin in the B position;

FIG. 7 is a state view of the interlock pin in the C position;

FIG. 8 is a state diagram of the interlocking pin in the D position;

wherein, 1, a panel; 1.1, a first grounding switch operation hole; 1.2.1, a first grounding operation disc pin movement hole; 1.2.2, a first isolating operation disc pin movement hole; 1.2.3, interlocking pin movement holes; 1.3, a first isolating switch operation hole; 1.4, a first breaker operation hole; 1.5, opening and closing the brake sight hole; 1.6, a brake separating button mounting position; 1.7, an electromagnetic lock mounting position; 1.8, limiting holes; 2. an interlock plate; 2.1.1, supporting rod limiting holes; 2.1.2, a second isolating operation disc pin moving hole; 2.1.3, a second grounding operation disc pin movement hole; 2.2, a second breaker operating hole; 2.3, interlocking pin holes; 2.4, a second isolating switch operation hole; 2.5, a second grounding switch operation hole; 3. a lock pin is connected; 4. an electromagnetic lock; 5. isolating the operating disk; 5.1, a disc pin; 5.2, strip-shaped bulges; 5.3, shaft holes; 6. isolating the operating shaft; 7. a ground operation disk; 8. the operating shaft is grounded.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

The utility model aims at providing a five prevent interlocking structure and circuit breaker thereof can inject the operation mode under a certain state through mechanical interlocking to avoid the loss that people's operation negligence leads to.

In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention is described in detail with reference to the accompanying drawings and the detailed description.

Referring to fig. 1, the present invention provides a five-prevention interlocking structure, which includes a panel 1 and an interlocking plate 2 disposed on the back of the panel 1, where the back of the panel 1 refers to a side of the panel 1 not facing an operator, and it should be noted that the panel 1 and the interlocking plate 2 are necessarily disposed in a joint manner, and other components may be disposed therebetween; referring to fig. 2, a first breaker operation hole 1.4, a first disconnector operation hole 1.3 and a first grounding switch operation hole 1.1 are sequentially arranged on a panel 1, and all the holes may be the same or different in size and are generally circular; referring to fig. 3, the interlock plate 2 is sequentially disposed with a second breaker operating hole 2.2, a second disconnector operating hole 2.4, and a second earthing switch operating hole 2.5, all of which may be provided in the same size or shape as the respective holes on the panel 1 mentioned above; referring to fig. 5-8, the interlocking plate 2 can slide relative to the panel 1 and has A, B, C, D four relative positions, it should be noted that the relative sliding between the panel 1 and the interlocking plate 2 can be realized by forming a strip-shaped hole on the interlocking plate 2 and providing a fixing pin on the panel 1, or by providing a guide slot and a slider between the panel 1 and the interlocking plate 2, as long as the relative sliding can be realized by the prior art, the specific structure is not limited, and when the position a is located, the centers of the holes do not coincide; when the position B is located, the centers of the first grounding switch operation hole 1.1 and the second grounding switch operation hole 2.5 are overlapped, and the centers of other holes are not overlapped; when the position C is located, the centers of the first isolating switch operation hole 1.3 and the second isolating switch operation hole 2.4 are overlapped, and the centers of other holes are not overlapped; when D position, first circuit breaker handle hole 1.4 and the coincidence of second circuit breaker handle hole 2.2 center, other holes all are not the coincidence of center.

Referring to fig. 1-3, a locking pin moving hole 1.2.3 is formed in the panel 1, a locking pin hole 2.3 is formed in the locking plate 2, a locking pin 3 is rotatably disposed in the locking pin hole 2.3, the locking pin 3 can slide in the locking pin moving hole 1.2.3, and a relative position relationship between the panel 1 and the locking plate 2 can be indicated by a moving position of the locking pin 3 in the locking pin moving hole 1.2.3.

Referring to fig. 2, the interlocking pin moving hole 1.2.3 is elongated and is sequentially provided with four circular hole-enlarging positions, the four circular hole-enlarging positions correspond to A, B, C, D four positions, respectively, and the length direction of the interlocking pin moving hole 1.2.3 should be consistent with the arrangement direction of the first breaker operating hole 1.4, the first disconnecting switch operating hole 1.3 and the first grounding switch operating hole 1.1.

Referring to fig. 1, the section of the moving part of the interlocking pin 3 in the interlocking pin moving hole 1.2.3 is a long strip, the interlocking pin 3 can be limited at the circular hole enlarging position after rotating, that is, the width of the interlocking pin 3 is smaller than the width of the interlocking pin moving hole 1.2.3, the length of the interlocking pin 3 is greater than the width of the interlocking pin moving hole 1.2.3, when the length direction of the interlocking pin 3 is consistent with the length direction of the interlocking pin moving hole 1.2.3, the interlocking pin 3 can freely slide in the length direction of the interlocking pin moving hole 1.2.3, and when the interlocking pin 3 rotates to be inconsistent with the length direction of the interlocking pin moving hole 1.2.3 at the circular hole enlarging position, the interlocking pin 3 is limited to be unable to slide in the length direction of the interlocking pin moving hole 1.2.3.

Referring to fig. 2, a first isolating operation disc pin moving hole 1.2.2 and a first grounding operation disc pin moving hole 1.2.1 are respectively formed in one side of a first isolating switch operation hole 1.3 and one side of a first grounding switch operation hole 1.1, wherein the first isolating operation disc pin moving hole 1.2.2 is an arc-shaped hole with the center of the first isolating switch operation hole 1.3 as a circle center, and the first grounding operation disc pin moving hole 1.2.1 is an arc-shaped hole with the center of the first grounding switch operation hole 1.1 as a circle center; referring to fig. 3, a second isolating operation disc pin moving hole 2.1.2 and a second grounding operation disc pin moving hole 2.1.3 are respectively formed in one side of the second isolating switch operation hole 2.4 and one side of the second grounding switch operation hole 2.5, wherein the second isolating operation disc pin moving hole 2.1.2 is an arc-shaped hole with the center of the second isolating switch operation hole 2.4 as a circle center, and the second grounding operation disc pin moving hole 2.1.3 is an arc-shaped hole with the center of the second grounding switch operation hole 2.5 as a circle center; when the centers of the first isolating switch operation hole 1.3 and the second isolating switch operation hole 2.4 are coincided, the centers of the first isolating operation disc pin movement hole 1.2.2 and the second isolating operation disc pin movement hole 2.1.2 are coincided; when the centers of the first grounding switch operation hole 1.1 and the second grounding switch operation hole 2.5 coincide, the centers of the first grounding operation disc pin movement hole 1.2.1 and the second grounding operation disc pin movement hole 2.1.3 coincide, and the disc pins 5.1 on the isolation operation disc 5 and the grounding operation disc 7 can respectively slide in the first isolation operation disc pin movement hole 1.2.2, the second isolation operation disc pin movement hole 2.1.2, the first grounding operation disc pin movement hole 1.2.1 and the second grounding operation disc pin movement hole 2.1.3.

Referring to fig. 3, the same ends of the second isolating operation disc pin moving hole 2.1.2 and the second grounding operation disc pin moving hole 2.1.3 extend a section of strip hole in opposite directions, and the other ends extend a section of strip hole in opposite directions.

The utility model also provides an use above-mentioned five circuit breakers of preventing interlocking structure, second circuit breaker handle hole 2.2, second isolator handle hole 2.4 and second earthing switch handle hole 2.5 correspond respectively and are provided with circuit breaker, isolator and earthing switch.

Referring to fig. 1, an isolation operation shaft 6 and an isolation operation disc 5 are sequentially arranged between the isolation switch and the second isolation switch operation hole 2.4; a grounding operation shaft 8 and a grounding operation disc 7 are sequentially arranged between the grounding switch and the second grounding switch operation hole 2.5; the isolation operation disc 5 and the grounding operation disc 7 have the same structure and comprise discs, disc pins 5.1 arranged at the tops of the discs far away from the circle center and strip-shaped bulges 5.2 protruding from the bottoms of the centers of the discs; the disc center is provided with shaft hole 5.3, when shaft hole 5.3 and second isolator operating hole 2.4 or second earthing switch operating hole 2.5 center coincide, disc round pin 5.1 can pass second isolator operating disc round pin motion hole 2.1.2 or second earthing operating disc round pin motion hole 2.1.3, it needs to be said that disc round pin 5.1 can be in second isolator operating disc round pin motion hole 2.1.2 and second earthing operating disc round pin motion hole 2.1.3 the same one end respectively one section rectangular hole that extends in opposite directions, the other end slides in the one section rectangular hole that each extends back to back of the body, at this moment, shaft hole 5.3 and second isolator operating hole 2.4 or second earthing switch operating hole 2.5 center do not coincide.

Referring to fig. 1, the disc pins 5.1 of the isolating operation disc 5 and the grounding operation disc 7 do not protrude out of the outer surface of the panel 1, so that tools are needed to operate the isolating operation disc and the grounding operation disc, and the possibility of misoperation is further reduced.

Referring to fig. 1 and 5-8, the circuit breaker further includes an electromagnetic lock 4, where the electromagnetic lock 4 can lock the position of the locking pin 3, it should be noted that the electromagnetic lock 4 can be a DSN3 type series indoor electromagnetic lock, which is an electromagnetic lock existing in the field, and the electromagnetic lock is an interlocking device of an electric control mechanism for preventing an electrical apparatus of a high-voltage switchgear from being operated by mistake, and is mainly suitable for interlocking parts, such as front and rear cabinet doors of the indoor high-voltage switchgear, a disconnecting switch, a circuit breaker, a ground wire, and the like, which need to be locked, so as to prevent the occurrence of misoperation.

The working principle of the utility model is as follows: the sequence of operations and the working positions that can be used are limited by the different positions of the interlocking pins 3 on the interlocking plate 2 on the panel 1. As shown in fig. 8, when the interlocking pin 3 is in the working position at the D hole, the circuit breaker load switch can only be operated to close through the first circuit breaker operation hole 1.4 on the panel 1, and the disconnecting switch and the grounding switch are closed by the interlocking plate 2 and cannot be operated; as shown in fig. 7, when the interlocking pin 3 reaches the position C, the second disconnecting switch operation hole 2.4 on the interlocking plate 2 is exactly overlapped with the first disconnecting switch operation hole 1.3 on the panel 1, at this time, the disconnecting switch can be operated to disconnect the circuit breaker, and the grounding switch and the circuit breaker load switch can not be operated at the same time; as shown in fig. 6, when the locking pin 3 has reached B, the grounding switch can be operated to ground the circuit breaker, so as to guide the residual current to the ground, and similarly, other switches cannot be used at the same time; finally, as shown in fig. 5, when the interlocking pin 3 is moved to a, all other holes are not operable, and the cabinet door can be opened for maintenance. When the corresponding position is reached, the operable position is sunk, and a tool is required to perform the operation, so that the possibility of misoperation is further reduced.

As shown in fig. 5-8, the top layer of the circuit breaker of the present invention is a panel 1, which has marks for indicating each operation hole, indication hole and movement hole. The limiting hole 1.8 is fixed on the circuit breaker through screw connection. A layer of the inside of the panel 1 is a linkage plate 2, a linkage pin 3 is rotatably arranged in a linkage pin hole 2.3 of the linkage plate 2, and the linkage pin 3 passes through a linkage pin moving hole 1.2.3 on the panel 1 and can slide in the linkage pin moving hole 1.2.3; simultaneously, still be provided with a plurality of bracing pieces on the panel 1, the other end of bracing piece is fixed in the inside of circuit breaker, be provided with the spacing hole of a plurality of bracing pieces 2.1.1 on the interlock board 2, the bracing piece passes the spacing hole of bracing piece 2.1.1, the spacing hole of bracing piece 2.1.1 is rectangular shape hole to can inject the moving direction of interlock board 2 through fixed bracing piece, and then restrict interlock board 2 and can only reciprocate (along the length direction of interlock round pin motion hole 1.2.3). The interlock plate 2 is restricted to stay at each position only at a certain operation position by the up-and-down movement and rotation of the interlock pin 3. For example, when the C position is the open position of the wind power circuit breaker (operable disconnecting switch), as shown in fig. 7, the second disconnecting switch operation hole 2.4 on the interlocking plate 2 coincides with the first disconnecting switch operation hole 1.3 on the panel 1, and the operator can use the operation rod to rotate the shaft hole 5.3 counterclockwise through the first disconnecting switch operation hole 1.3 (the second disconnecting switch operation hole 2.4) to drive the disc pin 5.1 to rotate from the closed position to the open position on the panel 1, and since the disc pin 5.1 on the disconnecting operation disc 5 simultaneously passes through the second disconnecting operation disc pin movement hole 2.1.2 of the interlocking plate 2 from right to left, the operation system can move downward in a step, that is, the interlocking pin 3 can be operated to move upward from the C position to the B position, which is the test position (operable grounding switch), as shown in fig. 6, the step of operating the grounding switch can be performed, the principle is the same as above. The D position is a working position (operable breaker), as shown in fig. 8, when the D position is reached, all the disc pins 5.1 are at the right "closing" position, and at this time, only the first breaker operation hole 1.4 (the second breaker operation hole 2.2) can be operated to perform the closing operation of the wind power breaker, and the interlocking pin 3 must be moved upward from the D position to perform the next step. As shown in fig. 5, the a position is a maintenance position (front door openable/closable).

As shown in fig. 2 and 5-8, the panel 1 is further provided with a switching-on/off visual hole 1.5 which can display a switching-on/off indication of the wind power circuit breaker; the opening button mounting position 1.6 can be used for opening the wind power circuit breaker; the electromagnetic lock 4 is installed at the electromagnetic lock installation position 1.7.

The utility model discloses a concrete example is applied to explain the principle and the implementation mode of the utility model, and the explanation of the above example is only used to help understand the method and the core idea of the utility model; meanwhile, for the general technical personnel in the field, according to the idea of the present invention, there are changes in the concrete implementation and the application scope. In summary, the content of the present specification should not be construed as a limitation of the present invention.

Claims (10)

1. A five-prevention interlocking structure is characterized by comprising a panel and an interlocking plate arranged on the back of the panel, wherein a first breaker operation hole, a first isolating switch operation hole and a first grounding switch operation hole are sequentially arranged on the panel, and a second breaker operation hole, a second isolating switch operation hole and a second grounding switch operation hole are sequentially arranged on the interlocking plate; the interlock plate is slidable relative to the face plate and has A, B, C, D four relative positions, in the A position, the centers of the holes coincide; when the position B is located, the centers of the first grounding switch operation hole and the second grounding switch operation hole are overlapped, and the centers of other holes are not overlapped; when the position C is located, the centers of the first isolating switch operation hole and the second isolating switch operation hole are overlapped, and the centers of other holes are not overlapped; when D position, first circuit breaker handle hole and the coincidence of second circuit breaker handle hole center, other holes all are not the coincidence of center.

2. The five-prevention interlocking structure according to claim 1, wherein the panel is provided with an interlocking pin moving hole, the interlocking plate is provided with an interlocking pin hole, an interlocking pin is rotatably arranged in the interlocking pin hole, and the interlocking pin can slide in the interlocking pin moving hole.

3. The five-prevention interlocking structure according to claim 2, wherein the interlocking pin moving hole is elongated and is sequentially provided with four circular hole-enlarging positions, and the four circular hole-enlarging positions respectively correspond to A, B, C, D four positions.

4. The five-prevention interlocking structure according to claim 3, wherein the section of the moving part of the interlocking pin in the interlocking pin moving hole is long-strip-shaped, and the interlocking pin can be limited at a round reaming position after being rotated.

5. The five-prevention interlocking structure according to any one of claims 1 to 4, wherein a first isolating operation disc pin moving hole and a first grounding operation disc pin moving hole are respectively arranged on one side of the first isolating switch operation hole and one side of the first grounding switch operation hole, wherein the first isolating operation disc pin moving hole is a section of arc-shaped hole with the center of the first isolating switch operation hole as a circle center, and the first grounding operation disc pin moving hole is a section of arc-shaped hole with the center of the first grounding switch operation hole as a circle center; a second isolating operation disc pin moving hole and a second grounding operation disc pin moving hole are respectively formed in one side of the second isolating switch operation hole and one side of the second grounding switch operation hole, wherein the second isolating operation disc pin moving hole is a section of arc-shaped hole with the center of the second isolating switch operation hole as the circle center, and the second grounding operation disc pin moving hole is a section of arc-shaped hole with the center of the second grounding switch operation hole as the circle center; when the centers of the first isolating switch operation hole and the second isolating switch operation hole are overlapped, the centers of the first isolating operation disc pin movement hole and the second isolating operation disc pin movement hole are overlapped; when the centers of the first grounding switch operation hole and the second grounding switch operation hole coincide, the center of the first grounding operation disc pin movement hole coincides with the center of the second grounding operation disc pin movement hole.

6. The five-prevention interlocking structure according to claim 5, wherein the same ends of the second isolating operation disc pin moving hole and the second grounding operation disc pin moving hole extend with a long hole towards each other, and the other ends of the second isolating operation disc pin moving hole and the second grounding operation disc pin moving hole extend with a long hole towards each other.

7. The circuit breaker applying the five-prevention interlocking structure as claimed in claim 5 or 6, wherein the second circuit breaker operation hole, the second disconnecting switch operation hole and the second grounding switch operation hole are respectively provided with a circuit breaker switch, a disconnecting switch and a grounding switch correspondingly.

8. The circuit breaker of claim 7, wherein an isolation operation shaft and an isolation operation disc are sequentially arranged between the isolation switch and the second isolation switch operation hole; a grounding operation shaft and a grounding operation disc are sequentially arranged between the grounding switch and the second grounding switch operation hole; the isolation operation disc and the grounding operation disc have the same structure and comprise discs, disc pins arranged on the tops of the discs far away from the circle center and strip-shaped bulges protruding from the bottoms of the centers of the discs; the disc center is provided with the shaft hole, when shaft hole and second isolator handle hole or second earthing switch handle hole center coincide, the disc round pin can pass second isolator handle disc round pin motion hole or second earthing handle disc round pin motion hole.

9. The circuit breaker of claim 8, wherein the disc pins on both the isolating operating disc and the grounding operating disc do not protrude beyond the outer surface of the faceplate.

10. The circuit breaker of claim 9, further comprising an electromagnetic lock capable of locking the position of the interlock pin.

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