Interlocking mechanism and switch cabinet

Abstract

The utility model belongs to the technical field of electrical interlocking control, and discloses an interlocking mechanism and a switch cabinet. The interlocking mechanism comprises a movable plate, a shielding piece and an interlocking plate. Wherein the movable plate is arranged on the isolation grounding switch; the shielding piece is in transmission connection with the movable plate and has a first state for shielding all the insertion holes and a second state for shielding part of the insertion holes; the interlocking plate is arranged in the circuit breaker and is in transmission connection with the movable plate; when the circuit breaker is switched on, a crank arm of the circuit breaker abuts against the interlocking plate, so that the interlocking plate limits the movement of the movable plate, and the shielding piece is in a first state; when the shielding piece is switched from the first state to the second state, the shielding piece drives the movable plate to move in the first direction, and the movable plate drives the interlocking plate, so that the interlocking plate limits closing of the circuit breaker. According to the utility model, the interlocking mechanism of the circuit breaker and the isolation grounding switch can be realized, the interlocking function of various operation states of the isolation grounding switch can be further realized, and the adaptability is improved.

Description

Technical Field

[0001] This utility model relates to the field of electrical interlocking control technology, and in particular to an interlocking mechanism and a switch cabinet. Background Technology

[0002] According to the "five-prevention" interlocking requirements for switchgear in the power industry, the operation of circuit breakers and isolating grounding switches must meet the following requirements: 1. When the isolating grounding switch is in operation, the circuit breaker is not allowed to be closed to prevent the circuit breaker from closing when the isolating grounding switch is in an isolated or grounded state, thereby avoiding accidents in the switchgear; 2. When the circuit breaker is closed, three-position operation is prohibited to prevent the operation of the isolating grounding switch when the main circuit of the switchgear is energized while the circuit breaker is closed, which could lead to accidents in the switchgear.

[0003] In addition to the standard "five-proof" requirements, the switchgear also has special electrical interlocking schemes: 1. When the switchgear busbar is grounded, personnel are not allowed to operate the isolating grounding switch to the closed state, but switching between the isolating grounding switch and the grounding state is permitted to prevent the isolating grounding switch from closing when the busbar is grounded, which could lead to a grounding fault in the entire switchgear; 2. When the switchgear cables are energized, it means that current is flowing through the switchgear. At this time, the isolating grounding switch is not allowed to switch to the grounding state to prevent the grounding switch from grounding when the cables are energized, which could lead to a grounding fault in the entire switchgear. Therefore, the isolating grounding switch has multiple operating states and requires adaptive interlocking according to various actual operating conditions.

[0004] The current interlocking mechanism has a single function and is difficult to adapt to the various interlocking situations of isolating grounding switches. Utility Model Content

[0005] The purpose of this utility model is to provide an interlocking mechanism and switch cabinet for realizing the interlocking mechanism of circuit breaker and isolating grounding switch, and at the same time, it can further realize the interlocking function of multiple operating states of isolating grounding switch, thereby improving adaptability.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] An interlocking mechanism for interlocking an isolation grounding switch and a circuit breaker, wherein the isolation grounding switch is provided with multiple insertion holes for operation, including:

[0008] The movable plate is mounted on the isolating grounding switch;

[0009] A blocking component is connected to the movable plate in a driving manner. The blocking component has a first state of covering all the insertion holes and a second state of covering part of the insertion holes.

[0010] An interlocking plate is disposed inside the circuit breaker, and the interlocking plate is throttle-connected to the movable plate;

[0011] When the circuit breaker is closed, the crank arm of the circuit breaker abuts against the interlocking plate, so that the interlocking plate restricts the movement of the movable plate and puts the blocking member in the first state; when the blocking member switches from the first state to the second state, the blocking member drives the movable plate to move along the first direction, and the movable plate drives the interlocking plate, so that the interlocking plate restricts the circuit breaker from closing.

[0012] As an alternative to the interlocking mechanism, the blocking member is provided with a transmission pin, and the movable plate is provided with a guide portion. When the blocking member switches from the first state to the second state, the transmission pin can squeeze the guide portion to make the movable plate move along the first direction.

[0013] As an alternative to the interlocking mechanism, the interlocking mechanism further includes a bracket, which is mounted on the isolating grounding switch. The bracket has a limiting groove, and the transmission pin can slide along the limiting groove.

[0014] As an optional interlocking mechanism, the insertion hole includes a first insertion hole for inserting a first operating handle and a second insertion hole for inserting a second operating handle. The first insertion hole is used to control the switching of the operation of the isolating grounding switch between a closed state and an isolated state, and the second insertion hole is used to control the switching of the operation of the isolating grounding switch between an isolated state and a grounded state. The blocking member is rotatably connected to the isolating grounding switch, and the blocking member is used to cover the first insertion hole and / or the second insertion hole.

[0015] As an alternative to the interlocking mechanism, the interlocking mechanism further includes a first telescopic rod. When the first telescopic rod is in a first extended state, the blocking member can abut against the first telescopic rod to restrict the rotation of the blocking member and close the first insertion hole. When the first telescopic rod is in a first retracted state, the blocking member can rotate and pass over the first telescopic rod to open the first insertion hole.

[0016] As an optional interlocking mechanism, the interlocking mechanism further includes a second telescopic rod. When the second telescopic rod is in a second extended state, the blocking member can abut against the second telescopic rod to restrict the rotation of the blocking member and close the second insertion hole. When the second telescopic rod is in a second retracted state, the blocking member can rotate and pass over the second telescopic rod to open the second insertion hole.

[0017] As an optional interlocking mechanism, the interlocking mechanism also includes a micro switch disposed on the isolating grounding switch, the movable plate can trigger the micro switch, and the micro switch is signal-connected to the relay protection device.

[0018] As an alternative interlocking mechanism, when the movable plate triggers the micro switch, the relay protection device can block the closing signal of the circuit breaker.

[0019] As an alternative to the interlocking mechanism, the interlocking mechanism further includes a linkage component, which is flexible, with one end connected to the movable plate and the other end connected to the interlocking plate.

[0020] The switchgear includes an isolating grounding switch, a circuit breaker, and the interlocking mechanism described in any of the above schemes.

[0021] Beneficial effects:

[0022] In the first aspect of this utility model, after the circuit breaker is closed, according to the relevant regulations on "five preventions," the isolating grounding switch is not allowed to be operated in any way. Therefore, the moving part—the crank arm—in the closing mechanism of the circuit breaker can directly abut against the interlocking plate, thereby restricting the movement of the interlocking plate. Furthermore, the interlocking plate further restricts the movement of the movable plate, so that the blocking part is always in the first state of covering all insertion holes, and the isolating grounding switch cannot be operated. When it is necessary to operate the isolating grounding switch, the blocking part is driven to move the movable plate upward, and the movable plate drives the interlocking plate so that the other end of the interlocking plate abuts against the closing mechanism, locking the circuit breaker closing mechanism and preventing closing. Through this interlocking mechanism, not only can the interlocking of the isolating grounding switch and the circuit breaker be realized, but it can also further adapt to various operating situations of the isolating grounding switch, improving adaptability.

[0023] In the second aspect of this utility model, a switch cabinet equipped with this interlocking mechanism can realize the interlocking of circuit breaker and isolating grounding switch, and at the same time can further enable the switching of multiple interlocking functions of isolating grounding switch, thus expanding the function of switch cabinet. Attached Figure Description

[0024] Figure 1 This is a side view of the internal structure of the isolating grounding switch, circuit breaker, and interlocking mechanism provided in this embodiment of the utility model;

[0025] Figure 2 This is a schematic diagram of the internal structure of the isolating grounding switch, circuit breaker, and interlocking mechanism provided in this embodiment of the utility model from a frontal perspective.

[0026] Figure 3 This is a partial cross-sectional structural diagram of the circuit breaker provided in this embodiment of the utility model;

[0027] Figure 4 This is a schematic diagram of the relationship between the shielding member and the movable plate when the shielding member is in the first state according to the embodiment of this utility model;

[0028] Figure 5This is a first structural schematic diagram of the relationship between the shielding member and the movable plate when the shielding member is in the second state according to the embodiment of this utility model;

[0029] Figure 6 This is a second structural schematic diagram showing the relationship between the shielding member and the movable plate when the shielding member is in the second state according to an embodiment of the present utility model.

[0030] Figure 7 This is a front view of the shielding component provided in this embodiment of the utility model;

[0031] Figure 8 This is a side view of the shielding component provided in an embodiment of the present utility model;

[0032] Figure 9 This is a schematic diagram of the structure of the movable plate and the bracket provided in this embodiment of the utility model;

[0033] Figure 10 This is a first structural schematic diagram of the cooperative relationship between the movable plate, the shielding plate, and the bracket provided in this embodiment of the utility model;

[0034] Figure 11 This is a second structural diagram showing the cooperative relationship between the movable plate, the shielding plate, and the bracket provided in this embodiment of the utility model.

[0035] In the picture:

[0036] X, first direction;

[0037] 100. Isolating grounding switch; 200. Circuit breaker; 210. Insertion hole; 211. First insertion hole; 212. Second insertion hole; 220. Crank arm; 221. Limit pin; 230. Bend plate; 231. Closing half shaft;

[0038] 1. Movable panel; 11. Guide section;

[0039] 2. Shielding component; 21. Transmission pin; 22. First shielding part; 23. Second shielding part; 24. Stop pin;

[0040] 3. Interlocking plate;

[0041] 4. Bracket; 41. Limiting groove;

[0042] 5. Limiting assembly; 51. First telescopic rod; 52. Second telescopic rod; 53. First electromagnet; 54. Second electromagnet;

[0043] 6. Micro switch;

[0044] 7. Linkage components. Detailed Implementation

[0045] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0046] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0047] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0048] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0049] Please see the appendix Figure 1 -Appendix Figure 3The first aspect of this embodiment relates to an interlocking mechanism for interlocking an isolating grounding switch 100 and a circuit breaker 200. The isolating grounding switch 100 is provided with a plurality of insertion holes 210 for operation. The interlocking mechanism includes a movable plate 1, a blocking member 2, and an interlocking plate 3. The movable plate 1 is mounted on the isolating grounding switch 100; the blocking member 2 is drivenly connected to the movable plate 1, and the blocking member 2 has a first state of covering all the insertion holes 210 and a second state of covering part of the insertion holes 210; the interlocking plate 3 is located inside the circuit breaker 200 and is drivenly connected to the movable plate 1; when the circuit breaker 200 is closed, the crank arm 220 of the circuit breaker 200 abuts against the interlocking plate 3, so that the interlocking plate 3 restricts the movement of the movable plate 1 and puts the blocking member 2 in the first state; when the blocking member 2 switches from the first state to the second state, the blocking member 2 drives the movable plate 1 to move along the first direction X, and the movable plate 1 drives the interlocking plate 3, so that the interlocking plate 3 restricts the closing of the circuit breaker 200.

[0050] Specifically, the movable plate 1 is located on the side of the isolating grounding switch 100 with the insertion hole 210. The blocking member 2 is also a plate-shaped member, and it is arranged parallel to the movable plate 1. At the same time, the blocking member 2 can drive the movable plate 1 to move upward along the first direction X, where the first direction X is the vertical direction. The first state of the blocking member 2 is to block all insertion holes 210, so that the multiple operating handles of the isolating grounding switch 100 cannot be inserted into the corresponding insertion holes 210. Therefore, in the first state, the isolating grounding switch 100 cannot be operated. The second state of the blocking member 2 is to block part of the insertion holes 210. Therefore, the operating handles can still be used to operate on the unblocked insertion holes 210. In actual operation, the blocking member 2 can be switched to different positions to block and restrict the corresponding insertion holes 210, ensuring that the corresponding insertion holes 210 cannot be operated.

[0051] Furthermore, after the circuit breaker 200 is closed, according to the relevant regulations of "five preventions", the isolating grounding switch 100 is not allowed to be operated in any way. Therefore, the moving part in the closing mechanism of the circuit breaker 200, the crank arm 220, rotates and directly abuts against the interlocking plate 3 through the limit pin 221 on the crank arm 220, thereby restricting the movement of the interlocking plate 3. The interlocking plate 3 further restricts the movement of the movable plate 1, so that the blocking part 2 is always in the first state of covering all insertion holes 210, and the isolating grounding switch 100 cannot be operated. When it is necessary to operate the isolating grounding switch 100, the blocking part 2 drives the movable plate 1 to move upward, and the movable plate 1 drives the interlocking plate 3 so that the other end of the interlocking plate 3 abuts against the bent plate 230, so that the bent plate 230 for closing cannot rotate, and thus cannot drive the closing half shaft 231 to rotate. If the circuit breaker 200 is to perform a closing operation, the closing half shaft 231 needs to rotate to achieve this. Therefore, when the blocking component 2 switches from the first state to the second state, that is, when the isolating grounding switch 100 switches from the non-operating state to the operating state, the closing mechanism of the circuit breaker 200 is locked and cannot be closed.

[0052] This interlocking mechanism not only enables the interlocking of the isolating grounding switch 100 and the circuit breaker 200, but also further adapts to various operating conditions of the isolating grounding switch 100, thus improving its adaptability.

[0053] Please see the appendix Figure 4 -Appendix Figure 8 Optionally, the blocking member 2 is provided with a transmission pin 21 and the movable plate 1 is provided with a guide part 11. When the blocking member 2 switches from the first state to the second state, the transmission pin 21 can squeeze the guide part 11 so that the movable plate 1 moves along the first direction X.

[0054] Specifically, the transmission pin 21 is erected on the plate surface of the shield 2. The transmission pin 21 can be connected to the shield 2 by interference fit or threaded fit. The downward edge of the movable plate 1 forms a guide portion 11, and the guide portion 11 is in the shape of an inverted "V". When the transmission pin 21 is placed at the tip of the "V", the movable plate 1 is at its lowest position, and the shield 2 is in the first state, and the isolating grounding switch 100 cannot be operated. When the movable plate 1 is rotated, the transmission pin 21 presses against the guide portion 11 and slides continuously from the tip of the "V" to the side. As a result, the movable plate 1 is lifted upward by the pressure of the transmission pin 21 and the closing mechanism of the circuit breaker 200 is locked.

[0055] In this embodiment, the movable plate 1 is moved by the transmission pin 21. The transmission method is simple and reliable. Furthermore, by optimizing the specific structure of the guide part 11, the moving distance of the movable plate 1 can be easily adjusted to adapt to the movement position relationship of the circuit breaker 200 closing mechanism.

[0056] Please see the appendix Figure 9-Appendix Figure 11 Furthermore, this interlocking mechanism also includes a bracket 4, which is mounted on the isolating grounding switch 100. The bracket 4 is provided with a limiting groove 41, and the transmission pin 21 can slide along the limiting groove 41.

[0057] Specifically, the bracket 4 is also a plate-shaped part. The bracket 4 can be fixed to the isolating grounding switch 100 by bolts. The bracket 4 is parallel to the movable plate 1. The bracket 4 forms an arc-shaped limiting groove 41. When the blocking part 2 is rotated, the transmission pin 21 on the blocking part 2 always slides along the limiting groove 41.

[0058] In this embodiment, the limiting groove 41 can provide guidance for the movement of the transmission pin 21, ensuring the reliability and stability of the movement of the transmission pin 21.

[0059] Furthermore, the insertion hole 210 includes a first insertion hole 211 for inserting a first operating handle and a second insertion hole 212 for inserting a second operating handle. The first insertion hole 211 is used to control the switching of the operating isolating grounding switch 100 between the closed state and the isolated state, and the second insertion hole 212 is used to control the switching of the operating isolating grounding switch 100 between the isolated state and the grounded state. The shielding member 2 is rotatably connected to the isolating grounding switch 100 and is used to cover the first insertion hole 211 and / or the second insertion hole 212.

[0060] In this embodiment, the main body of the shielding member 2 is a rectangular plate. A first shielding part 22 and a second shielding part 23 extend outward from the two opposite long sides of the shielding member 2, respectively. When the circuit breaker 200 is closed, the first shielding part 22 and the second shielding part 23 of the shielding member 2 block the first insertion hole 211 and the second insertion hole 212, respectively, so that the isolation grounding switch 100 cannot be operated. When it is necessary to operate the isolating grounding switch 100 and control the switching of the isolating grounding switch 100 between the closed state and the isolated state, by rotating the blocking member 2, the second blocking part 23 is just covered on the first insertion hole 211. At this time, the second insertion hole 212 is open, and the second operating handle can be directly inserted into the second insertion hole 212 for operation. When it is necessary to operate the isolating grounding switch 100 and control the switching of the isolating grounding switch 100 between the isolated state and the grounded state, by rotating the blocking member 2, the first blocking part 22 is just covered on the second insertion hole 212. At this time, the first insertion hole 211 is open, and the first operating handle can be directly inserted into the first insertion hole 211 for operation.

[0061] Optionally, the interlocking mechanism also includes a linkage 7, which is flexible, with one end connected to the movable plate 1 and the other end connected to the interlocking plate 3.

[0062] In this embodiment, the interlocking plate 3 is connected to the movable plate 1 via a linkage 7. The movable plate 1 drives the interlocking plate 3 to move via the linkage 7, causing the interlocking plate 3 to abut against the bent plate 230 of the closing mechanism, thereby restricting the rotation of the bent plate 230 and preventing the circuit breaker 200 from closing. The linkage 7 can be a cable, and a flexible cable can adapt to the linkage position requirements of the movable plate 1 and the interlocking plate 3. Specifically, one end of the linkage 7 is screwed onto the movable plate 1 with a bolt and nut, and the other end of the linkage 7 is also screwed onto the interlocking plate 3. When it is necessary to operate the isolating grounding switch 100, the movable plate 1 drives the interlocking plate 3 to move via the cable, causing the interlocking plate 3 to abut against the bent plate 230 of the closing mechanism, restricting the rotation of the bent plate 230, thereby preventing the circuit breaker 200 from closing.

[0063] Optionally, the interlocking mechanism also includes a micro switch 6 installed on the isolating grounding switch 100. The movable plate 1 can trigger the micro switch 6, and the micro switch 6 is connected to the relay protection device. When the movable plate 1 triggers the micro switch 6, the relay protection device can block the closing signal of the circuit breaker 200.

[0064] Specifically, when circuit breaker 200 needs to be closed, a closing signal can be remotely input through the relay protection device. If circuit breaker 200 does not output a closing signal, the relay protection device will continuously input a closing signal, keeping the closing coil energized for a long time, which may even burn out the closing coil in severe cases. To solve this problem, when operating the isolating grounding switch 100, the movable plate 1 moves upward, pressing the micro switch 6 to connect and output the signal that the isolating grounding switch 100 is operating. When the relay protection device receives the relevant signal, it will block the closing signal of circuit breaker 200, preventing the operator from remotely inputting a closing signal through the relay protection device. This achieves an electrical interlock that prevents circuit breaker 200 from performing a closing operation when the isolating grounding switch 100 needs to be operated.

[0065] Please refer to the appendix for further details. Figure 10 and attached Figure 11 Optionally, the interlocking mechanism further includes a first telescopic rod 51. When the first telescopic rod 51 is in a first extended state, the blocking member 2 can abut against the first telescopic rod 51 to restrict the rotation of the blocking member 2 and close the first insertion hole 211. When the first telescopic rod 51 is in a first retracted state, the blocking member 2 can rotate and pass over the first telescopic rod 51 to open the second insertion hole 212. Further, the interlocking mechanism also includes a second telescopic rod 52. When the second telescopic rod 52 is in a second extended state, the blocking member 2 can abut against the second telescopic rod 52 to restrict the rotation of the blocking member 2 and close the second insertion hole 212. When the second telescopic rod 52 is in a second retracted state, the blocking member 2 can rotate and pass over the second telescopic rod 52 to open the first insertion hole 211.

[0066] Below the isolating grounding switch 100, a limiting component 5 is also provided, which includes a first telescopic rod 51, a second telescopic rod 52, a first electromagnet 53, and a second electromagnet 54. The first electromagnet 53 and the second electromagnet 54 can be controlled by electrical circuitry; the first electromagnet 53 can drive the first telescopic rod 51 to extend and retract vertically, and the second electromagnet 54 can drive the second telescopic rod 52 to extend and retract vertically. A stop pin 24 is also provided on the blocking member 2.

[0067] Under normal conditions, the blocking member 2 always blocks the first insertion hole 211 and the second insertion hole 212, and the isolation grounding switch 100 is not allowed to be operated. When there is no electrical signal to make the first electromagnet 53 and the second electromagnet 54 move and cause the first telescopic rod 51 and the second telescopic rod 52 to retract, the first telescopic rod 51 and the second telescopic rod 52 are always in the extended state, thereby restricting the blocking member 2 on both sides through the stop pin 24, so that it cannot rotate.

[0068] When the busbar is grounded, the relay protection device receives a signal that the busbar is not energized. It controls the first electromagnet 53 via the electrical circuit, causing the first telescopic rod 51 to retract downwards. This allows the blocking member 2 to rotate to the left. After rotating to the left, the second insertion hole 212 on the right side is exposed, allowing the second operating handle to be inserted, thus switching the isolating-grounding state of the isolating grounding switch 100. Because the signal received by the second electromagnet 54 indicates that the cable is not energized, the second telescopic rod 52 remains extended, preventing the blocking member 2 from being moved to the right and thus preventing the insertion of the first operating handle to switch the isolating grounding switch 100 from closing to isolating. Adaptively, as the blocking member 2 rotates to the left, the transmission pin 21 fixed on it moves along with it. Since the contact portion between the movable plate 1 and the transmission pin 21 is an arc segment, the movable plate 1 will move further upwards, thus preventing the circuit breaker 200 from closing when operating the isolating grounding switch 100.

[0069] When the cable is energized, the relay protection device receives a energized signal and controls the second electromagnet 54 via the electrical circuit, causing the second telescopic rod 52 to retract downwards. This allows the blocking member 2 to rotate to the right. After the blocking member 2 rotates to the right, the first insertion hole 211 on the left is exposed, allowing the first operating handle to be inserted, thereby achieving the switching between the closing and isolation states of the isolating grounding switch 100. Since the signal received by the first electromagnet 53 indicates that the busbar is energized (or the busbar is not grounded), the movable rod of the first electromagnet 53 remains extended, preventing the blocking member 2 from rotating to the left and thus preventing the insertion of the second operating handle to switch the isolating grounding switch 100 between the isolation and grounding states. Adaptively, during the rotation of the blocking member 2 to the right, the transmission pin 21 fixed on the blocking member 2 moves along with it. Since the contact portion between the movable plate 1 and the transmission pin 21 is an arc segment, the movable plate 1 will move further upwards, thereby preventing the circuit breaker 200 from closing when operating the isolating grounding switch 100.

[0070] The second aspect of this embodiment also relates to a switch cabinet, which includes an isolating grounding switch 100, a circuit breaker 200, and an interlocking mechanism.

[0071] The switchgear equipped with this interlocking mechanism can realize the interlocking of circuit breaker 200 and isolating grounding switch 100, and can also further enable the switching of multiple interlocking functions of isolating grounding switch 100, thus expanding the function of the switchgear.

[0072] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. An interlocking mechanism for interlocking isolation grounding switches (100) and circuit breakers (200) provided with a plurality of insertion holes (210) for operation, characterized in that, The utility model relates to an interlocking mechanism of isolating grounding switch, and belongs to the technical field of electrical equipment. The utility model discloses an interlocking mechanism of isolating grounding switch, which comprises an activity board (1) arranged on the isolating grounding switch (100), a shielding piece (2) in transmission connection with the activity board (1), the shielding piece (2) has the first state of covering all the insertion hole (210) and the second state of covering part insertion hole (210), an interlocking plate (3) arranged in the circuit breaker (200), the interlocking plate (3) is in transmission connection with the activity board (1), when the circuit breaker (200) is closed, the crank arm (220) of the circuit breaker (200) is in abutment with the interlocking plate (3), so that the interlocking plate (3) restricts the activity board (1) movement, and the shielding piece (2) is placed in the first state, when the shielding piece (2) is switched from the first state to the second state, the shielding piece (2) drives the activity board (1) movement along the first direction (X), the activity board (1) drives the interlocking plate (3), so that the interlocking plate (3) restricts the circuit breaker (200) closing. The shielding piece (2) is provided with a transmission pin (21), and the activity board (1) is provided with a guide portion (11), when the shielding piece (2) is switched from the first state to the second state, the transmission pin (21) can extrude the guide portion (11), so that the activity board (1) moves along the first direction (X). The interlocking mechanism further comprises a support (4) arranged on the isolating grounding switch (100), and the support (4) is provided with a limiting groove (41), and the transmission pin (21) can slide along the limiting groove (41). The insertion hole (210) comprises a first insertion hole (211) for inserting a first operating handle and a second insertion hole (212) for inserting a second operating handle, the first insertion hole (211) is used for controlling the isolating grounding switch (100) to switch between the closing state and the isolation state, and the second insertion hole (212) is used for controlling the isolating grounding switch (100) to switch between the isolation state and the grounding state, the shielding piece (2) is in rotation connection with the isolating grounding switch (100), and the shielding piece (2) is used for covering the first insertion hole (211) and / or the second insertion hole (212).

2. The interlock mechanism of claim 1, wherein, The interlocking mechanism further comprises a first telescopic rod (51), when the first telescopic rod (51) is in a first extended state, the shielding piece (2) can abut on the first telescopic rod (51), so as to limit the rotation of the shielding piece (2) and close the first insertion hole (211), and when the first telescopic rod (51) is in a first contracted state, the shielding piece (2) can rotate and pass through the first telescopic rod (51) to open the first insertion hole (211).

3. The interlock mechanism of claim 2, wherein, ​ 4. The interlock mechanism of claim 1, wherein, ​ 5. The interlock mechanism of claim 4, wherein, ​ 6. The interlock mechanism of claim 4, wherein, The interlocking mechanism further comprises a second telescopic rod (52), when the second telescopic rod (52) is in a second extended state, the shielding piece (2) can abut against the second telescopic rod (52) to limit the rotation of the shielding piece (2) and close the second insertion hole (212); when the second telescopic rod (52) is in a second contracted state, the shielding piece (2) can rotate and pass through the second telescopic rod (52) to open the second insertion hole (212).

7. The interlock mechanism of claim 1, wherein, The interlocking mechanism further comprises a micro switch (6) arranged on the isolating grounding switch (100), the movable plate (1) can trigger the micro switch (6), and the micro switch (6) is connected with a relay protection device.

8. The interlock mechanism of claim 7, wherein, When the movable plate (1) triggers the micro switch (6), the relay protection device can block a closing signal of the circuit breaker (200).

9. The interlock mechanism of claim 1, wherein, The interlocking mechanism further comprises a linkage (7) having flexibility, one end of the linkage (7) is connected with the movable plate (1), and the other end of the linkage (7) is connected with the interlocking plate (3).

10. Switchgear, characterized in that The isolating grounding switch (100), the circuit breaker (200) and the interlocking mechanism according to any one of claims 1-9 are comprised.

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