Switchgear with interlocking mechanism

Abstract

The application discloses a switch cabinet with an interlocking mechanism, comprising a mounting panel, a grounding switch operating gate, an isolating switch operating gate, a circuit breaker operating gate and a lower cabinet door, and further comprising a locking device, a first limiting mechanism and a second limiting mechanism; when the first limiting mechanism is in a first working position, the grounding switch operating gate and the locking device are limited to restrict the opening of the lower cabinet door; when the first limiting mechanism is in a second working position, the locking device is limited to restrict the opening of the lower cabinet door; when the first limiting mechanism is in a third working position, the isolating switch operating gate and the circuit breaker operating gate are limited; and the second limiting mechanism is used for limiting the isolating switch operating gate. The application effectively and reliably ensures the interlocking between the grounding switch operating gate, the isolating switch operating gate, the circuit breaker operating gate and the locking device, so that the five-prevention interlocking function is realized.

Description

Technical Field

[0001] This application relates to the field of switchgear technology, and more particularly to a switchgear with an interlocking mechanism. Background Technology

[0002] In recent years, my country's economy has developed rapidly, which has also driven the development of the power grid. With users' increasing requirements for power supply reliability and the advancement of smart grid and urbanization construction, a broad market prospect has been provided for switchgear. Insulated switchgear must meet a series of safety conditions during use, such as preventing accidental opening or closing of circuit breakers; preventing the opening or closing of disconnecting switches under load; and preventing the closing of grounding switches while energized. In order to meet the above safety requirements, interlocking mechanisms are installed in the switchgear.

[0003] Existing switchgear typically uses nylon wires or steel wires to connect the operating mechanism and locking components. This type of interlocking has unreliable factors such as the soft wires being easily deformed, the locking mechanism not being secure, and the door panel being prone to shaking. Furthermore, it is prone to deformation during transportation, leading to interlocking failure. Some switchgear uses rigid interlocking rods to achieve the locking function, but because it uses direct penetration to lock the door, the door panel is not fixed, resulting in severe shaking and easy deformation. Summary of the Invention

[0004] One objective of this application is to provide a switchgear with an interlocking mechanism to solve the problem of poor structural reliability of existing switchgear interlocking mechanisms.

[0005] To achieve the above objectives, the technical solution adopted in this application is as follows: a switch cabinet with an interlocking mechanism, comprising a switch cabinet body and an interlocking mechanism, wherein the switch cabinet body includes a mounting panel, a grounding switch operating gate, a disconnecting switch operating gate, a circuit breaker operating gate, and a lower cabinet door, and the interlocking mechanism includes:

[0006] A locking device is provided on the mounting panel and cooperates with the lower cabinet door, the locking device being used to restrict the opening of the lower cabinet door;

[0007] A first limiting mechanism is movably mounted on the mounting panel. The first limiting mechanism is drivenly connected to the grounding switch operating gate and the disconnecting switch operating gate. When the grounding switch operating gate or the disconnecting switch operating gate is operated, the first limiting mechanism switches between a first working position, a second working position, and a third working position. When the first limiting mechanism is in the first working position, it is adapted to limit the grounding switch operating gate and the locking device to restrict the opening of the lower cabinet door. When the first limiting mechanism is in the second working position, it is adapted to limit the locking device to restrict the opening of the lower cabinet door. When the first limiting mechanism is in the third working position, it is adapted to limit the disconnecting switch operating gate.

[0008] The second limiting mechanism is movably mounted on the mounting panel and is drively connected to the circuit breaker operating gate. Thus, when the circuit breaker operating gate is in the closed state, the second limiting mechanism moves to a position that limits the disconnecting switch operating gate.

[0009] Furthermore, the first limiting mechanism is connected to the grounding switch operating gate, so that when the grounding switch operating gate performs a closing operation, the first limiting mechanism rotates 45° counterclockwise, and when the grounding switch operating gate performs a opening operation, the first limiting mechanism rotates 45° clockwise.

[0010] Furthermore, the first limiting mechanism is connected to the disconnecting switch operating gate, so that when the disconnecting switch operating gate performs a closing operation, the first limiting mechanism rotates 45° clockwise, and when the disconnecting switch operating gate performs a opening operation, the first limiting mechanism rotates 45° counterclockwise.

[0011] Furthermore, the angle between the line connecting the operating gate of the grounding switch and the rotating shaft of the first limiting mechanism and the connection between the operating gate of the disconnecting switch and the rotating shaft of the first limiting mechanism is 90°.

[0012] Furthermore, the locking device includes a locking pin assembly and a fixing assembly. The locking pin assembly is fixedly connected to a handle, so that when the handle is turned, the locking pin assembly moves from the fourth working position to the fifth working position. When the locking pin assembly is in the fourth working position, it is inserted into the lock hole of the lower cabinet door, and the lower cabinet door is closed. When the locking pin assembly is in the fifth working position, it is disengaged from the lock hole of the lower cabinet door, and the lower cabinet door is opened.

[0013] Furthermore, the locking pin assembly is connected to a return spring that can reset the locking pin assembly to the fourth working position.

[0014] Furthermore, the locking pin assembly is fixedly connected to a limiting baffle, which is adapted to limit the locking pin assembly to restrict the opening of the lower cabinet door. The limiting baffle is also adapted to limit the grounding switch operating gate 2 when the lower cabinet door is opened.

[0015] Furthermore, the locking device also includes a sliding baffle, which is slidably mounted on the mounting panel via an elastic element.

[0016] Furthermore, a push plate is provided on the lower cabinet door, which is adapted to limit the sliding so that the locking pin assembly is reset to the fourth working position.

[0017] Furthermore, the switch cabinet also includes an electromagnetic lock, which includes an electromagnetic lock shaft and a grounding switch operating gate baffle disposed on the electromagnetic lock shaft. The grounding switch operating gate baffle is adapted to limit the grounding switch operating gate.

[0018] Compared with the prior art, the beneficial effects of this application are as follows:

[0019] The first and second limit mechanisms are connected to the grounding switch operating gate, the disconnecting switch operating gate, and the circuit breaker operating gate. When the grounding switch operating gate, the disconnecting switch operating gate, and the circuit breaker operating gate are closed or opened, the first and second limit mechanisms can rotate to different working positions to limit each operating gate. The structure is simple and reliable, and can effectively ensure the interlocking between the grounding switch operating gate, the disconnecting switch operating gate, and the circuit breaker operating gate. That is, when the grounding switch operating gate is closed, the disconnecting switch operating gate and the circuit breaker operating gate cannot be operated; when the disconnecting switch operating gate is closed, the grounding switch operating gate cannot be operated; when the circuit breaker operating gate is closed, the grounding switch operating gate and the disconnecting switch operating gate cannot be operated. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the first limiting mechanism of the switchgear in this application when it is in the first working position;

[0021] Figure 2 This is a schematic diagram of the first limiting mechanism of the switchgear in this application when it is in the second working position;

[0022] Figure 3 This is a schematic diagram of the first limit mechanism of the switchgear in this application when it is in the third working position;

[0023] Figure 4 A partial enlarged view of the first limit mechanism of the switchgear in this application;

[0024] Figure 5 This is a front view of the locking pin assembly of the switchgear in the fourth working position of this application;

[0025] Figure 6 This is a side view of the locking pin assembly of the switchgear in the fourth working position of this application.

[0026] Figure 7 This is a front view of the locking pin assembly of the switchgear in the fifth working position of this application;

[0027] Figure 8 This is a side view of the locking pin assembly of the switchgear in the fifth working position of this application.

[0028] Figure 9 This is a schematic diagram of the sliding baffle of the switchgear in the initial position.

[0029] Figure 10 This is a schematic diagram of the sliding baffle of the switchgear in the limit position according to this application;

[0030] Figure 11 This is a schematic diagram of the electromagnetic lock of the switchgear in this application when it is locked.

[0031] Figure 12 This is a schematic diagram of the electromagnetic lock of the switchgear of this application being unlocked.

[0032] In the diagram: 1. Mounting panel; 2. Grounding switch operating gate; 3. Disconnecting switch operating gate; 4. Lower cabinet door; 41. Push plate; 5. Locking device; 51. Locking pin assembly; 511. Locking rod; 512. Sleeve plate; 52. Fixing assembly; 521. Upper baffle; 522. Flat seat plate; 53. Handle; 54. Limit baffle; 55. Return spring; 56. Sliding baffle; 57. Elastic element; 6. First limit mechanism; 61. Rotating part; 62. Blocking part; 7. Second limit mechanism; 8. Electromagnetic lock; 81. Electromagnetic lock shaft; 82. Grounding switch operating gate baffle. Detailed Implementation

[0033] The present application will be further described below with reference to specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0034] In the description of this application, it should be noted that the directional terms such as "center", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", and "counterclockwise" indicate the orientation and positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application 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. They should not be construed as limiting the specific protection scope of this application.

[0035] It should be noted that the terms "first," "second," etc., in the specification and claims of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0036] The terms “comprising” and “having”, and any variations thereof, in the specification and claims of this application are intended to cover non-exclusive inclusion, for example, a process, method, system, product, or device that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such process, method, product, or device.

[0037] like Figure 1-3 As shown, this application provides a switchgear with an interlocking mechanism, specifically including a switchgear body and an interlocking mechanism. The switchgear body includes a mounting panel 1, a grounding switch operating gate 2, a disconnecting switch operating gate 3, a circuit breaker operating gate (not shown in the figure), and a lower cabinet door 4. The interlocking mechanism includes:

[0038] The locking device 5 is mounted on the mounting panel 1 and cooperates with the lower cabinet door 4. The locking device 5 is used to restrict the opening of the lower cabinet door 4.

[0039] The first limit mechanism 6 is movably mounted on the mounting panel 1. The first limit mechanism 6 is connected to the grounding switch operating gate 2 and the disconnecting switch operating gate 3 in a transmission manner. Thus, when the grounding switch operating gate 2 or the disconnecting switch operating gate 3 is operated, the first limit mechanism 6 switches between the first working position, the second working position and the third working position.

[0040] like Figure 1 As shown, when the first limiting mechanism 6 is in the first working position, it is suitable for limiting the grounding switch operating gate 2 and the locking device 5 to restrict the opening of the lower cabinet door 4; Figure 2 As shown, when the first limiting mechanism 6 is in the second working position, it is suitable for limiting the locking device 5 to restrict the opening of the lower cabinet door 4; as Figure 3 As shown, when the first limit mechanism 6 is in the third working position, it is suitable for limiting the operating gate 3 of the disconnector switch.

[0041] The second limit mechanism 7 is movably mounted on the mounting panel 1. The second limit mechanism 7 is connected to the circuit breaker operating gate, so that when the circuit breaker operating gate is in the closed state, the second limit mechanism 7 moves to the position to limit the disconnecting switch operating gate 3.

[0042] To achieve interlocking functionality, the switchgear must be interlocked with the grounding switch operating gate 2, the disconnecting switch operating gate 3, the circuit breaker operating gate, and the lower cabinet door 4 during actual use: When the grounding switch operating gate 2 is closed, the disconnecting switch operating gate 3 cannot be operated, but the locking device 5 can be operated to open the lower cabinet door 4; when the disconnecting switch operating gate 3 is closed, the grounding switch operating gate 2 cannot be operated, the locking device 5 cannot be operated, and the lower cabinet door 4 is closed; when the circuit breaker operating gate is closed, the disconnecting switch operating gate 3 cannot be operated; when the lower cabinet door 4 is open, both the grounding switch operating gate 2 and the disconnecting switch operating gate 3 cannot be operated.

[0043] The correct power-off sequence for the switchgear is as follows: first, open the circuit breaker operating switch; then, open the isolating switch operating switch 3; if it is necessary to open the door for maintenance or replacement of parts inside the cabinet, then close the grounding switch operating switch 2; finally, open the lower cabinet door 4. The correct power-on sequence for the switchgear is as follows: first, close the lower cabinet door 4; then, open the grounding switch operating switch 2; then, close the isolating switch operating switch 3; finally, close the circuit breaker operating switch. The switchgear has three operating states: running, out of service, and under maintenance.

[0044] like Figure 1 As shown, when the switchgear is in operation, the electrical components inside the cabinet are connected to high voltage. The first limit mechanism 6 is in the first working position, and the second limit mechanism 7 moves to the position that limits the disconnector switch operating gate 3. At this time, the grounding switch operating gate 2 is in the open state, and the disconnector switch operating gate 3 and the circuit breaker operating gate are in the closed state. In this state, the grounding switch operating gate 2 is limited by the first limit mechanism 6, and the disconnector switch operating gate 3 is limited by the second limit mechanism 7. The grounding switch operating gate 2 is not allowed to be closed, and the disconnector switch operating gate 3 is not allowed to be opened. The locking device 5 is limited by the first limit mechanism 6 and cannot be unlocked. The lower cabinet door 4 cannot be opened, and the operator can only perform the opening operation on the circuit breaker operating gate.

[0045] In operation, after the operator performs a tripping operation on the circuit breaker operating gate, the second limit mechanism 7 moves to a position where the disconnecting switch operating gate 3 is not limited. At this time, only the disconnecting switch operating gate 3 can be tripped. After the disconnecting switch operating gate 3 is tripped, the first limit mechanism 6 rotates to the second working position, and the switch cabinet enters the shutdown state.

[0046] like Figure 2 As shown, when the switchgear is in a shutdown state, the electrical components inside the cabinet are disconnected from the high voltage. The first limit mechanism 6 is in the second working position, and the second limit mechanism 7 moves to a position where the disconnecting switch operating gate 3 is not limited. At this time, the grounding switch operating gate 2, the disconnecting switch operating gate 3, and the circuit breaker operating gate are all in the open state. In this state, the locking device 5 is limited by the first limit mechanism 6 and cannot be unlocked, and the lower cabinet door 4 cannot be opened. The operator can perform a closing operation on the grounding switch operating gate 2 or the disconnecting switch operating gate 3 to open the switchgear for maintenance or power supply.

[0047] In the off-state, if the operator wants to energize the switchgear, the operator can close the isolating switch operating gate 3. The first limit mechanism 6 rotates to the first working position, and the grounding switch operating gate 2 is limited and cannot be operated. At this time, the operator can further close the circuit breaker operating gate. When the circuit breaker operating gate is closed, the electrical components in the cabinet are connected to the high voltage, and the switchgear is energized. The second limit mechanism 7 moves to the position that limits the isolating switch operating gate 3 as the circuit breaker operating gate is closed. Both the grounding switch operating gate 2 and the isolating switch operating gate 3 are restricted and cannot be operated. The locking device 5 is restricted by the first limit mechanism 6 and cannot be unlocked, and the lower cabinet door 4 cannot be opened.

[0048] In the shutdown state, if the operator wants to open the switch cabinet for maintenance, the operator can close the grounding switch operating gate 2. The first limit mechanism 6 rotates to the third working position, the isolating switch operating gate 3 is limited and cannot be operated, and the locking device 5 is not restricted by the first limit mechanism 6. At this time, the operator can further unlock the locking device 5 and open the lower cabinet door 4.

[0049] like Figure 3 As shown, when the switchgear is under maintenance, the first limit mechanism 6 is in the third working position, and the second limit mechanism 7 moves to a position where it does not limit the disconnector operating gate 3. At this time, the disconnector operating gate 3 and the circuit breaker operating gate are in the open state, and the grounding switch operating gate 2 is in the closed state. In this state, the disconnector operating gate 3 is limited by the first limit mechanism 6, and the disconnector operating gate 3 is not allowed to be closed. The locking device 5 is not limited by the first limit mechanism 6, and the operator can unlock the locking device 5 and open the lower cabinet door 4 to inspect and maintain the electrical components inside the cabinet. When the lower cabinet door 4 is opened, the locking device 5 will move upward to limit the grounding switch operating gate 2. At this time, the grounding switch operating gate 2 is limited by the locking device 5, and the disconnector operating gate 3 is limited by the first limit mechanism 6, so neither can be operated.

[0050] In the outage and maintenance states, when the disconnector switch operating gate 3 is open, the circuit breaker operating gate is allowed to close. Accidental closing of the circuit breaker operating gate will not affect the safety of maintenance operations in the lower cabinet, because the disconnector switch operating gate 3 has a clearly visible break and sufficient safety distance.

[0051] like Figure 4As shown, in some embodiments, the first limiting mechanism 6 includes a rotating part 61 and a blocking part 62 connected to the rotating part 61. The blocking part 62 rotates with the rotating part 61, thereby switching between a first working position, a second working position, and a third working position. When the blocking part 62 rotates to the first working position, the blocking part 62 is located above the grounding switch operating gate 2, preventing the operator from operating the grounding switch operating gate 2, thereby limiting the grounding switch operating gate 2. When the blocking part 62 rotates to the second working position, one end face of the blocking part 62 contacts the locking device 5, preventing the locking device 5 from moving upward, thereby limiting the locking device 5. When the blocking part 62 rotates to the third working position, the blocking part 62 is located above the isolating switch operating gate 3, preventing the operator from operating the isolating switch operating gate 3, thereby limiting the isolating switch operating gate 3. The switching of the working positions of the first limiting mechanism 6 is achieved by operating the grounding switch operating gate 2 and the isolating switch operating gate 3.

[0052] Specifically, the first limit mechanism 6 is drivenly connected to the grounding switch operating gate 2, so that when the grounding switch operating gate 2 performs a closing operation, the first limit mechanism 6 rotates 45° counterclockwise, and when the grounding switch operating gate 2 performs a opening operation, the first limit mechanism 6 rotates 45° clockwise; the first limit mechanism 6 is drivenly connected to the disconnecting switch operating gate 3, so that when the disconnecting switch operating gate 3 performs a closing operation, the first limit mechanism 6 rotates 45° clockwise, and when the disconnecting switch operating gate 3 performs a opening operation, the first limit mechanism 6 rotates 45° counterclockwise.

[0053] Specifically, the angle between the line connecting the rotating shaft of the grounding switch operating gate 2 and the first limit mechanism 6 and the line connecting the rotating shaft of the disconnecting switch operating gate 3 and the first limit mechanism 6 is 90°. Therefore, when the first limit mechanism 6 rotates 45° clockwise or 45° counterclockwise, the blocking part 62 of the first limit mechanism 6 can be positioned directly above the grounding switch operating gate 2 or the disconnecting switch operating gate 3, preventing the operator from operating the grounding switch operating gate 2 or the disconnecting switch operating gate 3.

[0054] like Figure 5-8 As shown, the locking device 5 includes a locking pin assembly 51 and a fixing assembly 52. ​​The locking pin assembly 51 includes multiple locking rods 511 and a sleeve plate 512. The sleeve plate 512 is fixed on the locking rods 511. The fixing assembly 52 includes an upper baffle 521 and a flat seat plate 522. The locking rods 511 are movably inserted into the flat seat plate 522. The upper baffle 521 and the flat seat plate 522 can be installed on the mounting panel 1 by common fixing connection methods such as bolt connection.

[0055] The locking pin assembly 51 is fixedly connected to a handle 53, so that when the handle 53 is moved, the locking pin assembly 51 moves from the fourth working position to the fifth working position. Figure 5-6As shown, when the locking pin assembly 51 is in the fourth working position, the locking pin assembly 51 is inserted into the lock hole of the lower cabinet door 4, and the lower cabinet door 4 is closed; as Figure 7-8 As shown, when the locking pin assembly 51 is in the fifth working position, the locking pin assembly 51 disengages from the lock hole of the lower cabinet door 4, and the lower cabinet door 4 opens.

[0056] In some embodiments, the handle 53 is fixed on the sleeve plate 512. When the handle 53 is turned, the handle 53 drives the sleeve plate 512 to move upward, the locking pin assembly 51 moves from the fourth working position to the fifth working position, and then the locking rod 511 disengages from the lock hole of the lower cabinet door 4, so that the operator can open the lower cabinet door 4.

[0057] The locking pin assembly 51 is connected to a return spring 55 that can reset the locking pin assembly 51 to the fourth working position. The return spring 55 is sleeved on the upper part of the locking rod 511 and elastically abuts against the upper baffle 521 and the sleeve plate 512. When the handle 53 is released, the sleeve plate 512 moves downward under the action of the return spring 55, the locking pin assembly 51 moves from the fifth working position to the fourth working position, the locking rod 511 is inserted into the lock hole of the lower cabinet door 4, and the lower cabinet door 4 is closed.

[0058] The locking pin assembly 51 is fixedly connected to a limiting baffle 54, which is adapted to limit the locking pin assembly 51 to restrict the opening of the lower cabinet door 4. In some embodiments, when the switchgear is in operation or shutdown, the first limiting mechanism 6 is located in the first working position or the second working position. One end face of the blocking part 62 of the first limiting mechanism 6 contacts the limiting baffle 54, restricting the limiting baffle 54 from moving upward, thus preventing the handle 53 from moving the locking pin assembly 51 to the fifth working position, and the lower cabinet door 4 cannot be opened. When the switchgear is under maintenance, the first limiting mechanism 6 is located in the third working position. The blocking part 62 of the first limiting mechanism 6 moves outside the limiting baffle 54, thus allowing the handle 53 to move the locking pin assembly 51 to the fifth working position, and the lower cabinet door 4 to open. When the lower cabinet door 4 is open, the limiting baffle 54 is located above the grounding switch operating gate 2, and the first limiting mechanism 6 is located above the disconnecting switch operating gate 3. Therefore, when the lower cabinet door 4 is open, the operator cannot perform opening and closing operations on the grounding switch operating gate 2 and the disconnecting switch operating gate 3.

[0059] like Figure 9-10As shown, the locking device 5 also includes a sliding baffle 56, which is slidably mounted on the mounting panel 1 via an elastic element 57. Specifically, when the lower cabinet door 4 is closed and the locking pin assembly 51 is in the fourth working position, the locking rod 511 is inserted into the lock hole of the lower cabinet door 4, and the sliding baffle 56 abuts against the locking rod 511; when the lower cabinet door 4 is opened and the locking pin assembly 51 moves to the fifth working position, the locking rod 511 disengages from the lock hole of the lower cabinet door 4, and the sliding baffle 56 moves under the action of the elastic element 57 to the bottom of the locking rod 511, blocking the bottom surface of the locking rod 511 and preventing the locking pin assembly 51 from resetting to the fourth working position under the action of the return spring 55 when the lower cabinet door 4 is opened.

[0060] A push plate 41 is provided at the upper end of the lower cabinet door 4. The push plate 41 is adapted to limit the sliding baffle 56 so that the locking pin assembly 51 can return to the fourth working position when the lower cabinet door 4 is closed. Specifically, when the lower cabinet door 4 is closed, the push plate 41 abuts against the sliding baffle 56, forcing the sliding baffle 56 to move backward until it no longer blocks the bottom surface of the locking rod 511. Under the action of the return spring 55, the locking pin assembly 51 moves to the fourth working position, the locking rod 511 is inserted into the lock hole of the lower cabinet door 4, and the lower cabinet door 4 is closed.

[0061] like Figure 11-12 As shown, in some embodiments, the mounting panel 1 of the switchgear is equipped with an electromagnetic lock 8. The electromagnetic lock includes an electromagnetic lock shaft 81 and a grounding switch operating gate baffle 82 disposed on the battery lock shaft. The grounding switch operating gate baffle 82 is adapted to limit the grounding switch operating gate 2. When the electromagnetic lock 8 is locked, the electromagnetic lock shaft 81 extends to the right, and the grounding switch operating gate baffle 82 moves above the grounding switch operating gate 2, thereby preventing the operator from operating the grounding switch operating gate 2. Figure 11 As shown; when the electromagnetic lock is unlocked, the electromagnetic lock shaft 81 retracts to the left, and the grounding switch operating gate baffle 82 no longer blocks the grounding switch operating gate 2, thus allowing the grounding switch operating gate 2 to be operated, as shown. Figure 12 As shown.

[0062] Specifically, when the switchgear is in operation and the first limit mechanism 6 is in the first working position, the first limit mechanism 6 limits the grounding switch operating gate 2. At this time, regardless of whether the electromagnetic lock 8 is opened, the grounding switch operating gate 2 cannot be operated. When the switchgear is in shutdown and the first limit mechanism 6 is in the second working position, the first limit mechanism 6 does not limit the grounding switch operating gate 2. At this time, the electromagnetic lock 8 can be opened to perform a closing operation on the grounding switch operating gate 2. After closing, the first limit mechanism 6 rotates to the third working position, and the switchgear enters operation. In the maintenance state, the handle 53 can be moved to the fifth working position to open the lower cabinet door 4 for maintenance of the internal electrical components. After the maintenance is completed, the lower cabinet door 4 is closed, and the locking pin assembly 51 is reset to the fourth working position under the action of the return spring 55. At this time, the grounding switch operating gate 2 can be opened. After opening, the first limit mechanism 6 rotates to the second working position, and then the electromagnetic lock 8 is closed. The grounding switch operating gate baffle 82 moves to the top of the grounding switch operating gate 2 to limit the grounding switch operating gate 2, and the switch cabinet enters the shutdown state.

[0063] The basic principles, main features, and advantages of this application have been described above. Those skilled in the art should understand that this application is not limited to the above embodiments. The embodiments and descriptions in the specification are merely the principles of this application. Various changes and modifications can be made to this application without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection claimed by this application is defined by the appended claims and their equivalents.

Claims

1. A switchgear with an interlocking mechanism, comprising a switchgear body and an interlocking mechanism, wherein the switchgear body includes a mounting panel, a grounding switch operating gate, a disconnecting switch operating gate, a circuit breaker operating gate, and a lower cabinet door, characterized in that, The interlocking mechanism includes: A locking device is provided on the mounting panel and cooperates with the lower cabinet door. The locking device is used to restrict the opening of the lower cabinet door. The locking device includes a locking pin assembly and a fixing assembly. The locking pin assembly is fixedly connected to a handle and a limiting baffle. When the handle is turned, the locking pin assembly moves from the fourth working position to the fifth working position. When the locking pin assembly is in the fourth working position, it is inserted into the lock hole of the lower cabinet door, and the lower cabinet door is closed. When the locking pin assembly is in the fifth working position, it is disengaged from the lock hole of the lower cabinet door, and the lower cabinet door is opened. The locking pin assembly is also connected to a return spring that can reset the locking pin assembly to the fourth working position. A first limiting mechanism is movably mounted on the mounting panel. The first limiting mechanism is drivenly connected to the grounding switch operating gate and the disconnecting switch operating gate. When the grounding switch operating gate or the disconnecting switch operating gate is operated, the first limiting mechanism switches between a first working position, a second working position, and a third working position. When the first limiting mechanism is in the first working position, it is adapted to limit the grounding switch operating gate and the locking device to restrict the opening of the lower cabinet door. When the first limiting mechanism is in the second working position, it is adapted to limit the locking device to restrict the opening of the lower cabinet door. When the first limiting mechanism is in the third working position, it is adapted to limit the disconnecting switch operating gate. The second limiting mechanism is movably mounted on the mounting panel and is drively connected to the circuit breaker operating gate. Thus, when the circuit breaker operating gate is in the closed state, the second limiting mechanism moves to a position that limits the disconnecting switch operating gate. The limiting baffle is adapted to limit the locking pin assembly to restrict the opening of the lower cabinet door. The limiting baffle is also adapted to limit the grounding switch operating gate when the lower cabinet door is open. When the first limiting mechanism is in the first working position or the second working position, one end face of the blocking part of the first limiting mechanism contacts the limiting baffle to restrict the upward movement of the limiting baffle. As a result, the handle cannot be turned to move the locking pin assembly to the fifth working position, and the lower cabinet door cannot be opened. When the first limiting mechanism is in the third working position, the blocking part of the first limiting mechanism moves outside the limiting baffle, the handle can be turned to move the locking pin assembly to the fifth working position, and the lower cabinet door opens. When the lower cabinet door is open, the limiting baffle is located above the grounding switch operating gate, and the grounding switch operating gate cannot be opened or closed. The locking device also includes a sliding baffle, which is slidably mounted on the mounting panel via an elastic element. When the lower cabinet door is opened and the locking pin assembly moves to the fifth working position, the locking rod of the locking pin assembly disengages from the lock hole of the lower cabinet door. Under the action of the elastic element, the sliding baffle moves to below the locking rod to block the bottom surface of the locking rod, preventing the locking pin assembly from resetting to the fourth working position under the action of the return spring when the lower cabinet door is opened.

2. The switchgear as described in claim 1, characterized in that, The first limiting mechanism is connected to the grounding switch operating gate, so that when the grounding switch operating gate performs a closing operation, the first limiting mechanism rotates 45° counterclockwise, and when the grounding switch operating gate performs a opening operation, the first limiting mechanism rotates 45° clockwise.

3. The switchgear as described in claim 1, characterized in that, The first limiting mechanism is connected to the disconnecting switch operating gate, so that when the disconnecting switch operating gate performs a closing operation, the first limiting mechanism rotates 45° clockwise, and when the disconnecting switch operating gate performs a opening operation, the first limiting mechanism rotates 45° counterclockwise.

4. The switch cabinet as described in claim 2 or 3, characterized in that, The angle between the line connecting the operating gate of the grounding switch and the rotating shaft of the first limiting mechanism and the line connecting the operating gate of the disconnecting switch and the rotating shaft of the first limiting mechanism is 90°.

5. The switch cabinet as described in claim 1, characterized in that, A push plate is provided at the upper end of the lower cabinet door. The push plate is adapted to limit the sliding baffle so that the locking pin assembly is reset to the fourth working position.

6. The switchgear as described in claim 1, characterized in that, It also includes an electromagnetic lock, which includes an electromagnetic lock shaft and a grounding switch operating gate baffle disposed on the electromagnetic lock shaft. The grounding switch operating gate baffle is adapted to limit the grounding switch operating gate.

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