Interlocking device of circuit breaker and main and standby supply disconnectors

Abstract

The application relates to the technical field of circuit breakers, in particular to an interlocking device for a circuit breaker and a main / backup power supply disconnecting switch, which comprises a driving connecting rod, an interlocking shaft, a first conversion mechanism, a main shaft, an interlocking block and a second conversion mechanism. The driving connecting rod is linked with the opening / closing action of the circuit breaker. The first conversion mechanism is used for converting the displacement action of the driving connecting rod into the rotary action of the interlocking shaft. The main shaft is linked with the opening / closing action of the disconnecting switch. The side wall of the main shaft is provided with a limiting groove. The interlocking block can be displaced in the direction of approaching or moving away from the main shaft. The second conversion mechanism is used for converting the rotary action of the interlocking shaft into the displacement action of the main shaft. When the circuit breaker is in the closing state, the interlocking block extends into the limiting groove and limits the rotation of the main shaft. In this way, only when the circuit breaker is in the opening state, the main / backup power supply disconnecting switch can be operated. Through the stable and reliable mechanical interlocking, the safety accidents caused by misoperation can be effectively avoided.

Description

Technical Field

[0001] This application relates to the field of circuit breaker technology, and more specifically, to an interlocking device between a circuit breaker and a main / standby disconnecting switch. Background Technology

[0002] Live-line work (LDP) is a crucial measure for leading international power grid companies to improve power supply reliability. It plays a vital role in ensuring uninterrupted power supply, reducing pre-planned outage time and scope, and enhancing customer experience. LDP aims to achieve uninterrupted power supply, shorten outage time, or reduce outage area, thereby improving equipment availability, power supply reliability, and customer satisfaction. In my country, most medium-voltage distribution networks consist of overhead and cable lines. These lines operate in complex environments, and many operate on single-circuit power supplies. When a fault occurs in a distribution line or equipment, the lack of suitable temporary restoration methods or quick access points often results in prolonged power outages for users, causing economic losses to both manufacturers and the power grid company.

[0003] The existing interlocking device between the circuit breaker and the main and backup disconnect switches is inadequate and can only be achieved through electrical interlocking. As a result, without electrical interlocking protection, it is easy to cause safety accidents due to misoperation.

[0004] Therefore, how to solve the problem that existing circuit breakers and main / backup disconnect switches are only electrically interlocked, which can easily lead to safety accidents caused by misoperation, is a key technical problem that those skilled in the art need to solve. Summary of the Invention

[0005] To at least partially overcome the problems existing in related technologies, the purpose of this application is to provide an interlocking device for a circuit breaker and a main / standby disconnecting switch, which can solve the problem that existing circuit breakers and main / standby disconnecting switches are only electrically interlocked, making them prone to safety accidents caused by misoperation. The various technical effects of the preferred technical solutions provided in this application are detailed below.

[0006] This application provides an interlocking device between a circuit breaker and a main / standby disconnecting switch, comprising:

[0007] The drive linkage is linked to the opening and closing action of the circuit breaker and can be displaced along its own axial direction;

[0008] The interlocking shaft can rotate along its own axis;

[0009] The first conversion mechanism is located between the drive link and the interlocking shaft, and is used to convert the displacement movement of the drive link into the rotation movement of the interlocking shaft.

[0010] The main shaft is linked to the opening and closing action of the disconnecting switch and can rotate along its own axis. The side wall of the main shaft is provided with a limiting groove.

[0011] The interlocking block can be displaced in a direction close to or away from the main shaft and can extend into the limiting groove;

[0012] The second conversion mechanism is located between the interlocking shaft and the interlocking block, and is used to convert the rotational motion of the interlocking shaft into the displacement motion of the main shaft.

[0013] When the circuit breaker is in the closed state, the interlocking block extends into the limiting groove and restricts the rotation of the main shaft; when the circuit breaker is in the open state, the interlocking block extends out of the limiting groove and cancels the restriction on the main shaft.

[0014] Preferably, it further includes an elastic element for displacing the interlocking block in a direction away from the main shaft.

[0015] Preferably, the second conversion mechanism includes:

[0016] An interlocking crank arm is fixed to the interlocking shaft and can rotate with the interlocking shaft;

[0017] An inclined plane is provided on the interlocking block and is located on the rotation path of the end of the interlocking crank arm away from the interlocking shaft;

[0018] When the interlocking crank arm abuts against the inclined plane, the interlocking crank arm slides along the inclined plane and pushes the interlocking block to move in a direction closer to the main shaft.

[0019] Preferably, the first conversion mechanism includes a slot crank arm, one end of which is fixed to the interlocking shaft and the other end is hinged to the drive linkage.

[0020] Preferably, the device further includes a fixing frame, which has a sliding hole extending in a direction close to or away from the main shaft, and the interlocking block has a slider that is slidably connected to the sliding hole.

[0021] Preferably, the interlocking block is provided with a push rod for extending into the limiting groove, and the fixing frame is provided with a guide hole for the push rod to pass through.

[0022] Preferably, the elastic element is configured as a compression spring, which is sleeved outside the top rod and has both ends abutting between the main body of the fixing frame and the interlocking block.

[0023] Preferably, the slider and the interlocking block are detachably connected and are located on opposite sides of the sliding hole.

[0024] Preferably, a connecting shaft is provided on the drive link, and the slot crank arm is bolted to the end of the connecting shaft away from the drive link.

[0025] Preferably, the drive linkage is linked to the opening and closing action of the circuit breaker via a drive crank arm.

[0026] The technical solution provided in this application may include the following beneficial effects:

[0027] When the circuit breaker closes, the drive linkage shifts, and through the first conversion mechanism, drives the interlocking shaft to rotate. The interlocking shaft, through the second conversion mechanism, drives the interlocking block to shift, causing the interlocking block to move closer to the main shaft until the interlocking shaft extends into the limit slot, restricting the rotation of the main shaft. This prevents the disconnecting switch from being operated for opening and closing operations, thus fulfilling the interlocking function that prevents the main and backup power disconnecting switches from operating when the circuit breaker is closed. When the circuit breaker opens, the drive linkage shifts in the opposite direction, and through the first conversion mechanism, drives the interlocking shaft to rotate in the opposite direction. The interlocking shaft, through the second conversion mechanism, drives the interlocking block to shift in the opposite direction, causing the interlocking block to move away from the main shaft until the interlocking shaft extends out of the limit slot and no longer restricts the rotation of the main shaft. This allows the disconnecting switch to be operated for opening and closing operations, fulfilling the interlocking function that only the main and backup power disconnecting switches can operate when the circuit breaker is open. With this configuration, the main and backup power disconnect switches can only be operated when the circuit breaker is in the open state. Through stable and reliable mechanical interlocking, safety accidents caused by misoperation are effectively avoided.

[0028] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0029] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0030] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 This is a side sectional view of the interlocking device between the circuit breaker and the main and backup power disconnect switches, according to some exemplary embodiments;

[0032] Figure 2This is a top view of the interlocking device between the circuit breaker and the main and backup power disconnect switches, according to some exemplary embodiments.

[0033] Figure 3 yes Figure 2 A magnified view of position A in the middle;

[0034] Figure 4 This is a partial sectional view of the interior of the enclosure of the interlocking device between the circuit breaker and the main and backup power disconnectors, shown according to some exemplary embodiments (circuit breaker open state);

[0035] Figure 5 This is an exploded view of the interlocking block and the Z-plate shown according to some exemplary embodiments;

[0036] Figure 6 This is a perspective view of the interlocking device between the circuit breaker and the main and backup power disconnect switches, according to some exemplary embodiments;

[0037] Figure 7 yes Figure 6 A magnified view of position B in the middle.

[0038] In the diagram: 1. Main spindle; 2. Z-plate; 21. Guide hole; 22. Sliding hole; 23. Fixing hole; 3. Interlocking block; 31. Compression spring; 32. Push rod; 33. Locking hole; 34. Inclined surface; 4. Interlocking crank arm; 5. Interlocking shaft; 51. Slotted crank arm; 6. Seal; 7. Bolt; 8. Connecting shaft; 9. Drive crank arm; 10. Drive connecting rod; 11. Flat groove; 12. Locking element. Detailed Implementation

[0039] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses or methods consistent with some aspects of this application.

[0040] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be described in detail below. Obviously, the described embodiments are merely some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0041] Hereinafter, embodiments will be described with reference to the accompanying drawings. Furthermore, the embodiments shown below do not limit the scope of the invention as described in the claims. Additionally, the complete contents of the configurations represented in the embodiments below are not limited to those necessary for the solution of the invention described in the claims.

[0042] refer to Figure 1-7 This specific embodiment provides an interlocking device for a circuit breaker and a main / standby power supply disconnecting switch, including a drive linkage 10, an interlocking shaft 5, a first conversion mechanism, a main shaft 1, an interlocking block 3, and a second conversion mechanism.

[0043] The drive link 10 is linked to the opening and closing action of the circuit breaker and can be displaced along its own axial direction. When the circuit breaker performs the opening and closing action, the drive link 10 is displaced accordingly. When the drive link 10 is displaced, the circuit breaker performs the opening and closing action accordingly. Here, the drive link 10 can be a component of the circuit breaker itself or an external component.

[0044] The main shaft 1 is linked to the opening and closing action of the disconnecting switch and can rotate along its own axis. When the disconnecting switch opens or closes, the main shaft 1 rotates accordingly. When the main shaft 1 rotates, the disconnecting switch opens or closes accordingly. Here, the main shaft 1 can be a component of the disconnecting switch itself or an external component.

[0045] The interlocking shaft 5 can rotate along its own axis. Specifically, the interlocking shaft 5 passes through the housing and can rotate relative to the housing.

[0046] Since the circuit breaker is located inside the enclosure and the disconnector is located outside the enclosure, the design of the interlocking shaft 5 allows mechanical movements to be transmitted between the inside and outside of the enclosure, facilitating the mechanical linkage between the circuit breaker and the disconnector. Furthermore, to ensure the enclosure's airtightness, sealing elements 6 are installed on both sides of the enclosure to seal the connection between the enclosure and the interlocking shaft 5.

[0047] The side wall of the main shaft 1 is provided with a limit groove. The interlocking block 3 can move in the direction close to or away from the main shaft 1 and can extend into or out of the limit groove. When the interlocking block 3 is in the limit groove, the main shaft 1 is restricted from rotating and thus cannot perform opening and closing operations on the disconnecting switch. When the interlocking block 3 is outside the limit groove, the main shaft 1 is not restricted from rotating and thus can perform opening and closing operations on the disconnecting switch.

[0048] Here, the limiting groove is set as a flat groove 11 that runs through both ends; of course, it can also be set as a hole structure.

[0049] The first conversion mechanism is located between the drive link 10 and the interlocking shaft 5, and is used to convert the displacement action of the drive link 10 into the rotation action of the interlocking shaft 5, so as to realize the mechanical linkage between the drive link 10 and the interlocking shaft 5; the second conversion mechanism is located between the interlocking shaft 5 and the interlocking block 3, and is used to convert the rotation action of the interlocking shaft 5 into the displacement action of the main shaft 1, so as to realize the mechanical linkage between the interlocking block 3 and the interlocking shaft 5.

[0050] When the circuit breaker is closed, the drive link 10 is displaced, and through the first conversion mechanism, the interlocking shaft 5 is rotated. The interlocking shaft 5, through the second conversion mechanism, causes the interlocking block 3 to displace, so that the interlocking block 3 moves closer to the main shaft 1 until the interlocking shaft 5 extends into the limit groove, restricting the rotation of the main shaft 1. This prevents the disconnecting switch from being operated to perform opening and closing operations, thus satisfying the interlocking function that prevents the main and backup power disconnecting switches from operating when the circuit breaker is closed. When the circuit breaker is open, the drive link 10 is displaced in the opposite direction, and through the first conversion mechanism, the interlocking shaft 5 is rotated in the opposite direction. The interlocking shaft 5, through the second conversion mechanism, causes the interlocking block 3 to displace in the opposite direction, so that the interlocking block 3 moves away from the main shaft 1 until the interlocking shaft 5 extends out of the limit groove and no longer restricts the rotation of the main shaft 1. This allows the disconnecting switch to be operated to perform opening and closing operations, thus satisfying the interlocking function that only the main and backup power disconnecting switches can be operated when the circuit breaker is open.

[0051] With this configuration, the main and backup power disconnect switches can only be operated when the circuit breaker is in the open state. Through stable and reliable mechanical interlocking, safety accidents caused by misoperation are effectively avoided.

[0052] In this embodiment, the interlocking device also includes an elastic element, which is used to drive the interlocking block 3 to move away from the main shaft 1. This ensures that the interlocking block 3 can extend out of the limiting groove when it is not under force, which is beneficial to the return of the interlocking block 3 and avoids the problem of unlocking failure caused by structural jamming, thus ensuring the effectiveness of mechanical transmission.

[0053] The second conversion mechanism includes an interlocking crank arm 4 and an inclined plane 34. The interlocking crank arm 4 is fixed to the interlocking shaft 5 and can rotate with the interlocking shaft 5. The inclined plane 34 is disposed on the interlocking block 3 and is located on the rotation path of the end of the interlocking crank arm 4 away from the interlocking shaft 5, so that the interlocking crank arm 4 can slide against the inclined plane 34. Specifically, the first end of the interlocking crank arm 4 is fixed to the interlocking shaft 5, and the second end extends in the direction close to the interlocking block 3 until it can abut against the inclined plane 34.

[0054] When the circuit breaker closes, the second end of the interlocking crank arm 4, driven by the interlocking shaft 5, rotates towards the interlocking block 3 until it abuts against the inclined surface 34. At this time, the interlocking crank arm 4 continues to rotate with the interlocking shaft 5, causing the second end of the interlocking shaft 5 to slide along the inclined surface 34 and push the interlocking block 3 to move towards the main shaft 1. This allows the interlocking block 3 to extend into the limiting groove of the main shaft 1 and restrict the rotation of the main shaft 1. When the circuit breaker opens, the second end of the interlocking crank arm 4, driven by the interlocking shaft 5, releases the force on the interlocking block 3. Under the action of the elastic element, the interlocking block 3 moves away from the main shaft 1, allowing the interlocking block 3 to extend out of the limiting groove and release the restriction on the main shaft 1.

[0055] By dividing the displacement action of interlocking block 3 into two parts for driving, the reliability of the displacement action of interlocking block 3 can be improved, structural jamming can be avoided, and the efficiency of mechanical transmission can be improved.

[0056] In some preferred embodiments, the interlocking device further includes a fixed frame with a sliding hole 22 extending in a direction close to or away from the main shaft 1. Correspondingly, the interlocking block 3 is provided with a slider that is slidably connected to the sliding hole 22, so that the interlocking block 3 can be slidably connected relative to the fixed frame. In this way, the fixed frame can achieve stable support for the interlocking block 3 and ensure the sliding stability of the interlocking block 3.

[0057] It should be noted that since the interlocking block 3 is located outside the enclosure, the fixing bracket can be fixed to the outer wall of the enclosure to fix the interlocking block 3 to the enclosure and slide it, thus ensuring the stable support of the interlocking block 3.

[0058] Specifically, the slider and the interlocking block 3 are detachably connected and located on both sides of the sliding hole 22, which prevents the slider from coming out of the sliding hole 22. At the same time, it facilitates the assembly and disassembly of the fixing frame and the interlocking block 3, thereby improving assembly efficiency.

[0059] like Figure 5 As shown, the slider is set as a locking member 12, and a locking hole 33 is provided on the interlocking block 3. One end of the locking member 12 is connected to the locking hole 33, and the other end is located on both sides of the sliding hole 22, respectively, and the interlocking block 3 is located on both sides of the locking hole 22.

[0060] In addition, a push rod 32 is provided on the interlocking block 3 for extending into the limiting groove. Correspondingly, a guide hole 21 is provided on the fixing frame for the push rod 32 to pass through. When the interlocking block 3 moves in the direction close to the main shaft 1, the push rod 32 is guided by the guide hole 21 and can accurately extend into the limiting groove of the main shaft 1, thereby improving the accuracy and efficiency of the interlock.

[0061] Furthermore, the elastic element is configured as a compression spring 31, which is sleeved on the outside of the top rod 32. At the same time, the two ends of the compression spring 31 abut against the main body of the fixing frame and the interlocking block 3. In this way, the tightness and stability of the installation of the elastic element can be improved through the multiple limiting of the top rod 32, the fixing frame and the main body of the interlocking block 3.

[0062] It should be noted that the main body of the interlocking block 3 is the part of the interlocking block 3 excluding the push rod 32. In order to abut against the compression spring 31, the width of the main body of the interlocking block 3 should be greater than the width of the push rod 32.

[0063] like Figure 7 As shown, in order to save space occupied by the fasteners, the fastener is set as a Z-shaped plate 2. One end plate of the Z-shaped plate 2 is provided with a fixing hole 23 and fixed to the box body, and the other end is provided with a guide hole 21. The middle plate of the Z-shaped plate 2 is provided with a sliding hole 22.

[0064] In some embodiments, the first conversion mechanism includes a slot crank arm 51, one end of which is fixed to the interlocking shaft 5 and the other end is hinged to the drive link 10. When the circuit breaker operates to open or close, the drive link 10 is displaced and drives the slot crank arm 51 to rotate around the interlocking shaft 5, thereby driving the interlocking shaft 5 to rotate. This converts the displacement action of the drive link 10 into the rotation action of the interlocking shaft 5. As such, the structure is simple, stable and reliable, and saves costs.

[0065] The drive link 10 is provided with a connecting shaft 8. One end of the connecting shaft 8 is fixed to the drive link 10, and the other end is connected with a bolt 7, so that the slot crank arm 51 is connected to the end of the connecting shaft 8 away from the drive link 10 by the bolt 7, so as to realize the hinge connection between the slot crank arm 51 and the drive link 10, which is convenient, reliable and easy.

[0066] Specifically, a threaded hole is provided on the connecting shaft 8, and the threaded part of the bolt 7 passes through the slot crank arm 51 and connects with the threaded hole. The head of the bolt 7 and the connecting shaft 8 are located on both sides of the slot crank arm 51, respectively.

[0067] like Figure 4 As shown, the drive linkage 10 is linked to the opening and closing action of the circuit breaker via the drive crank arm 9. Specifically, the drive crank arm 9 is equipped with three hinge shafts, two of which are hinged to the drive linkage 10 and the opening and closing action components of the circuit breaker, respectively, and the other end is hinged to a fixed point. By rotating the drive crank arm 9 around this fixed point, the displacement of the drive linkage 10 drives the displacement of the circuit breaker's opening and closing action components. In this way, the number of structural components is reduced, facilitating linkage transmission and ensuring high efficiency and stability.

[0068] The interlocking device will now be described in detail with reference to the above embodiments.

[0069] 1. Activate the interlock

[0070] like Figure 1 , 2 As shown in Figures 3 and 4, an interlocking block 3 is provided between the main shaft 1 of the disconnecting switch and the housing. When the circuit breaker is closed, the driving linkage drives the interlocking shaft 5 to rotate counterclockwise through the driving crank arm 9. The interlocking crank arm 4 on the interlocking shaft 5 rotates counterclockwise as well. The long arm end of the interlocking crank arm 4 presses down on the inclined surface 34. Under the guidance of the sliding hole 22, the interlocking block 3 approaches the main shaft 1 of the disconnecting switch until the top rod 32 reaches the offset groove of the main shaft 1 of the disconnecting switch, so that the main shaft 1 of the disconnecting switch cannot be rotated when the operating handle of the disconnecting switch is pulled down.

[0071] 2. Interlock Release

[0072] like Figure 3 As shown, when the interlocking crank arm 4 leaves the inclined plane 34, the compression spring 31 pushes the interlocking block 3 away from the main shaft 1 of the disconnecting switch, and the push rod 32 no longer abuts against the offset groove of the main shaft 1 of the disconnecting switch. When the operating handle of the disconnecting switch is pulled down, the main shaft 1 of the disconnecting switch can be rotated for operation.

[0073] 3. Circuit breaker tripping - lockout release

[0074] like Figure 1 , Figure 4 As shown, the drive linkage 10 is provided with a connecting shaft 8, and one end of the interlocking shaft 5 that passes through the housing is provided with a slotted crank arm 51. The bolt 7 passes through the slotted crank arm 51 and the connecting shaft 8 to hinge the interlocking shaft 5 and the connecting shaft 8. The other end of the interlocking shaft 5 extends out of the housing and is provided with an interlocking crank arm 4. Near the interlocking crank arm 4 is an interlocking block 3. The interlocking block 3 is supported and guided by the Z-shaped plate 2. When the interlocking crank arm 4 moves away from the interlocking block 3, the interlocking block 3 moves away from the main shaft 1 of the disconnecting switch under the restoring force of the compression spring 31.

[0075] When the circuit breaker is tripped, the drive linkage 10 moves the drive crank arm 9 to the left, tripping the circuit breaker via the insulating pull rod. Figure 4 As the drive linkage 10 moves to the left, it drives the interlocking shaft 5 to rotate clockwise via the connecting shaft 8, bolt 7, and slotted crank arm 51, causing the interlocking crank arm 4 to rotate. The long arm end of the interlocking crank arm 4 moves away from the interlocking block 3, and the push rod 32 on the interlocking block 3 moves away from the main shaft 1 of the disconnecting switch under the force of the compression spring 31. The main shaft 1 of the disconnecting switch is no longer restricted, thus satisfying the interlocking function of releasing the disconnecting switch from operation when the circuit breaker is tripped.

[0076] 4. Circuit breaker closing – interlocking start

[0077] The principle is the same as the above-mentioned locking release, but the transmission direction is opposite, which will not be described in detail here.

[0078] It should be noted that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., used herein to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, 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, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," and "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0079] In the description herein, it should also be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0080] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

[0081] It is understood that the same or similar parts in the above embodiments can be referred to each other, and the content not described in detail in some embodiments can be referred to the same or similar content in other embodiments. The multiple solutions provided in this application contain their own basic solutions, are independent of each other, and do not restrict each other, but they can also be combined with each other without conflict to achieve multiple effects.

[0082] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. An interlocking device for a circuit breaker and a main / standby disconnecting switch, characterized in that, include: The drive link (10) is linked with the opening and closing action of the circuit breaker and can move along its own axial direction; The interlocking shaft (5) can rotate along its own axis; The first conversion mechanism is located between the drive link (10) and the interlocking shaft (5) and is used to convert the displacement action of the drive link (10) into the rotation action of the interlocking shaft (5). The main shaft (1) is linked to the opening and closing action of the disconnecting switch and can rotate along its own axis. The side wall of the main shaft (1) is provided with a limiting groove. The interlocking block (3) can be displaced in a direction close to or away from the main shaft (1) and can extend into the limiting groove; The second conversion mechanism is located between the interlocking shaft (5) and the interlocking block (3) and is used to convert the rotational action of the interlocking shaft (5) into the displacement action of the interlocking block (3). When the circuit breaker is in the closed state, the interlocking block (3) extends into the limiting groove and restricts the rotation of the main shaft (1). When the circuit breaker is in the open state, the interlocking block (3) extends out of the limiting groove and cancels the restriction on the main shaft (1). It also includes an elastic element for displacing the interlocking block (3) in a direction away from the main shaft (1); The second conversion mechanism includes: The interlocking crank arm (4) is fixed to the interlocking shaft (5) and can rotate with the interlocking shaft (5); The inclined plane (34) is disposed on the interlocking block (3) and is located on the rotation path of the interlocking crank arm (4) away from the interlocking shaft (5); When the interlocking crank arm (4) abuts against the inclined plane (34), the interlocking crank arm (4) slides along the inclined plane (34) and pushes the interlocking block (3) to move in a direction close to the main shaft (1).

2. The interlocking device for the circuit breaker and the main / standby disconnector according to claim 1, characterized in that, The first conversion mechanism includes a slot crank arm (51), one end of which is fixed to the interlocking shaft (5) and the other end is hinged to the drive linkage (10).

3. The interlocking device for the circuit breaker and the main / standby disconnector according to claim 1, characterized in that, It also includes a fixing frame, on which a sliding hole (22) is provided extending in a direction close to or away from the main shaft (1), and a slider is provided on the interlocking block (3) that is slidably connected to the sliding hole (22).

4. The interlocking device for the circuit breaker and the main / standby disconnecting switch according to claim 3, characterized in that, The interlocking block (3) is provided with a top rod (32) for extending into the limiting groove, and the fixing frame is provided with a guide hole (21) for the top rod (32) to pass through.

5. The interlocking device for the circuit breaker and the main / standby disconnecting switch according to claim 4, characterized in that, The elastic element is configured as a compression spring (31), which is sleeved outside the top rod (32) and has both ends abutting between the main body of the fixing frame and the interlocking block (3).

6. The interlocking device for the circuit breaker and the main / standby disconnector according to claim 3, characterized in that, The slider is detachably connected to the interlocking block (3) and is located on both sides of the sliding hole (22).

7. The interlocking device for the circuit breaker and the main / standby disconnector according to claim 2, characterized in that, A connecting shaft (8) is provided on the drive link (10), and the slot crank arm (51) is connected to the end of the connecting shaft (8) away from the drive link (10) by bolts (7).

8. The interlocking device for the circuit breaker and the main / standby disconnecting switch according to claim 1, characterized in that, The drive linkage (10) is linked to the opening and closing action of the circuit breaker through the drive crank arm (9).

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