An emergency interface cabinet with a security lock

Abstract

This utility model discloses an emergency interface cabinet with a safety lock, including a cabinet body, a grounding switch operating shaft, a first program lock, a second program lock, and an emergency power interface. The grounding switch operating shaft is equipped with a baffle that rotates synchronously with it, and the first program lock has a retractable tongue. When the grounding switch is not fully open, the baffle prevents the tongue from extending, thus preventing the first program lock from releasing the key; when the grounding switch is fully open, the baffle avoids the tongue, and the first program lock releases the key to open the second program lock. The extended tongue also restricts the rotation of the baffle and the grounding switch operating shaft, thereby preventing accidental closing of the grounding switch when a generator is connected, and improving emergency power connection safety.

Description

Technical Field

[0001] This utility model relates to the field of electrical equipment safety interlocking technology, and in particular to an emergency interface cabinet with a safety protection lock. Background Technology

[0002] Emergency interface cabinets are typically used to provide access points for external emergency power equipment when the mains power or conventional power supply system fails. For example, they can be connected to a generator truck via an emergency power interface to provide temporary power to the load. These emergency interface cabinets are generally equipped with a grounding switch operating structure, which allows for grounding or de-grounding of relevant lines.

[0003] In actual use, if the grounding switch is not in the open state, i.e., the relevant lines are still grounded, and the emergency interface door is opened and connected to the generator truck, the generator truck's output power may be directly discharged through the grounding circuit, causing a grounding short circuit. This can easily lead to equipment damage, protection tripping, or even personal injury accidents. At the same time, if the grounding switch's operating structure can still be misoperated during the generator truck connection or power supply process, it may also lead to the grounding switch being accidentally closed, thus creating a short circuit risk.

[0004] In existing emergency interface cabinets, there is usually a lack of reliable mechanical sequence interlocking between the grounding switch operating structure and the emergency interface door, or management relies solely on manual confirmation or ordinary door locks. This makes it difficult to structurally enforce the rule that "the emergency interface door can only be opened after the grounding switch has been tripped" and that "the grounding switch cannot be mistakenly operated while the emergency interface door is open or the generator is connected." Therefore, it is necessary to provide an emergency interface cabinet that can achieve mechanical interlocking between the grounding switch operating structure and the emergency interface door. Utility Model Content

[0005] The purpose of this utility model is to provide an emergency interface cabinet with a safety lock, which solves the problem that the existing emergency interface cabinet lacks a reliable mechanical interlock between the grounding switch operation structure and the emergency interface door, making it easy to connect the emergency power supply when the grounding switch is not tripped, or to accidentally operate the grounding switch during emergency power supply.

[0006] To achieve the above objectives, this utility model provides an emergency interface cabinet with a safety lock, including a cabinet body, a grounding switch operating shaft mounted on the cabinet body, a first program lock, and an emergency power interface. A baffle is fixedly mounted on the grounding switch operating shaft, and the baffle rotates synchronously with the grounding switch operating shaft. The first program lock has a retractable tongue. The baffle switches between an obstructing position and a yielding position as the grounding switch operating shaft rotates.

[0007] When the operating shaft of the grounding switch is not rotated to the predetermined position for opening the corresponding grounding switch, the stop plate is in the blocking position and located in the extension path of the tongue, thereby preventing the tongue from extending into place and preventing the first program lock from rotating to the key release position. At this time, the key cannot be removed from the first program lock and therefore cannot be used to open the lock on the emergency interface door, thus preventing the emergency interface door from being opened and emergency power from being connected when the grounding switch is not open.

[0008] When the operating shaft of the grounding switch rotates to the predetermined position for opening the corresponding grounding switch, the stop plate is in the avoidance position, avoiding the extension path of the tongue, allowing the tongue to extend into place and enabling the first program lock to rotate to the key release position. After the first program lock releases the key, the key can be used to open the second program lock, thereby opening the emergency interface door used to block the emergency power interface.

[0009] Furthermore, the baffle includes a plate body fixedly connected to the operating shaft of the grounding switch and a flange disposed at one end of the plate body. The flange can enter or avoid the extension path of the tongue as the plate body rotates. When the flange enters the extension path of the tongue, the tongue is blocked and cannot extend into place; when the flange avoids the extension path of the tongue, the tongue can extend into place, so as to realize the locking of the first program lock and the release of the key.

[0010] Furthermore, the cabinet is equipped with an emergency interface door for obstructing the emergency power interface. This door has a second program lock, and both the first and second program locks share the same key. When the first program lock is turned to the key-release position, the key is released and used to unlock the second program lock. Thus, by transferring the same key between the first and second program locks, a mechanical sequential interlock is achieved between the grounding switch operating shaft and the emergency interface door.

[0011] Furthermore, the flange has a limiting surface that mates with the tongue, and the tongue, after extending into position, lies on the rotation path of the limiting surface. When the baffle tends to rotate, the limiting surface abuts against the tongue, thereby restricting the rotation of the baffle and the grounding switch operating shaft. Thus, after the first program lock completes locking and the key is released, the grounding switch operating shaft is restricted from rotating, preventing accidental operation of the grounding switch during generator connection or power supply.

[0012] Furthermore, the first-stage lock has a rotatable lock cylinder, with a cam connected to its tail. The cam engages with a drive shaft, which is connected to a latch. When the lock cylinder rotates, the cam pushes the drive shaft to move in a predetermined direction, causing the latch to extend or retract. If the latch's extension path is blocked by a stop, the drive shaft cannot move into position, and the lock cylinder cannot continue rotating to the key-release position. If the stop avoids the latch's extension path, the latch can extend into position, and the lock cylinder can rotate to the key-release position.

[0013] Furthermore, a spring flange is formed on the drive shaft, and a spring is sleeved on the drive shaft. One end of the spring abuts against the spring flange to drive the drive shaft to reset. The first program lock has a tumbler that cooperates with the lock cylinder. The tumbler abuts against a tumbler spring, which drives the tumbler to move toward the lock cylinder to achieve mechanical locking of the lock cylinder and key recognition.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows: by setting a baffle plate that rotates synchronously with the grounding switch operating shaft and making the baffle plate cooperate with the tongue of the first program lock, the position of the grounding switch operating shaft can determine whether the first program lock can be rotated to the key release position, thereby forcibly ensuring that the key can only be released from the first program lock after the grounding switch is fully open, and can be used to open the second program lock and the emergency interface door, thus avoiding grounding short circuit caused by connecting the generator car when the grounding switch is not open.

[0015] Meanwhile, after the tongue of the first program lock extends into place, the tongue can cooperate with the limiting surface on the baffle to restrict the baffle and the grounding switch operating shaft from continuing to rotate, thereby preventing the grounding switch from being accidentally closed during emergency power supply or generator power supply, and improving the operational safety and mechanical anti-misoperation performance of the emergency interface cabinet. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall external structure of an emergency interface cabinet with a safety lock.

[0017] Figure 2 This is a schematic diagram of the internal structure of an emergency interface cabinet with a safety lock.

[0018] Figure 3 This is a schematic diagram of the first-stage lock structure of an emergency interface cabinet with a safety lock.

[0019] Figure 4 for Figure 3 A schematic diagram of an emergency interface cabinet with a security lock in a state where it has failed to unlock.

[0020] Figure 5 This is a schematic diagram showing the key release status of an emergency interface cabinet with a security lock.

[0021] Attached icon numbers:

[0022] 1. Cabinet; 2. Grounding switch operating shaft; 21. Baffle; 3. First program lock; 31. Lock cylinder; 32. Drive shaft; 321. Spring; 322. Spring retaining flange; 33. Tumbler spring; 34. Tumbler; 35. Cam; 36. Tongue; 4. Second program lock; 5. Emergency power interface. Detailed Implementation

[0023] The technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of this application.

[0024] like Figure 1 and Figure 2 As shown, this embodiment provides an emergency interface cabinet with a safety lock, which includes a cabinet body 1, a grounding switch operating shaft 2, a first program lock 3, a second program lock 4, and an emergency power interface 5. The cabinet body 1 is used to install and accommodate the electrical components and mechanical interlocking structures in the emergency interface cabinet. The emergency power interface 5 is located inside the cabinet body 1 and is used to connect to external emergency power equipment during emergency power supply, such as connecting to the output cable of a generator truck, so that when the conventional power supply line cannot supply power normally, temporary power can be provided to the load side through the generator truck or other emergency power sources.

[0025] Cabinet 1 is equipped with an emergency interface door to cover the emergency power interface 5. When closed, the emergency interface door covers the emergency power interface 5 to prevent unauthorized personnel from directly contacting it and to prevent connection to the generator car under unsafe operating conditions. A second program lock 4 is located on the emergency interface door to control its opening and closing. That is, the emergency interface door can only be opened after the second program lock 4 is activated, allowing the emergency power interface 5 to be exposed and connected to the generator car cable.

[0026] The grounding switch operating shaft 2 is mounted on the cabinet 1 and is connected to the grounding switch operating mechanism inside the cabinet 1. The grounding switch operating shaft 2 allows operators to rotate it using a handle or other tools, switching the grounding switch between the closed grounding state and the open state. When the grounding switch is in the closed grounding state, the lines related to the emergency power interface 5 are grounded, and power supply from the generator vehicle is not permitted. When the grounding switch is in the open state, the lines are disconnected from the grounding circuit, and only then is it safe to open the emergency interface door and connect to the emergency power supply.

[0027] like Figure 2 , Figure 4 and Figure 5As shown, a baffle plate 21 is fixedly provided on the operating shaft 2 of the grounding switch. The baffle plate 21 is fixedly connected to the operating shaft 2 of the grounding switch and can rotate synchronously with the operating shaft 2 of the grounding switch. That is, when the operator operates the grounding switch to close or open via the operating shaft 2 of the grounding switch, the baffle plate 21 will rotate together with the operating shaft 2 of the grounding switch and switch to different positions according to different rotation angles of the operating shaft 2 of the grounding switch. In this embodiment, the baffle plate 21 has at least a blocking position and a yielding position. When the operating shaft 2 of the grounding switch has not rotated to the predetermined position for opening the corresponding grounding switch, the baffle plate 21 is in the blocking position; when the operating shaft 2 of the grounding switch rotates to the predetermined position for opening the corresponding grounding switch, the baffle plate 21 is in the yielding position.

[0028] The first program lock 3 is mounted on the cabinet 1 and located on one side of the grounding switch operating shaft 2 and the stop plate 21. The first program lock 3 cooperates with the stop plate 21 to determine whether the grounding switch operating shaft 2 has rotated to the predetermined position for opening the corresponding grounding switch. The first program lock 3 also releases the key after the grounding switch operating shaft 2 reaches the open position, allowing the key to be removed and used to open the second program lock 4. The first program lock 3 and the second program lock 4 share the same key, thus forming a mechanical key-type sequential interlock. This structure does not achieve interlocking through electrical control programs, sensors, or controllers, but rather restricts the operating sequence by transferring the key between the first program lock 3 and the second program lock 4.

[0029] Specifically, when safety conditions are not met, the key is held in the first program lock 3 and cannot be removed. Therefore, the second program lock 4 cannot be opened with the key, the emergency interface door cannot be opened, and the emergency power interface 5 cannot be accessed or connected to the generator car. Only when the grounding switch operating shaft 2 is rotated to the open position, placing the stop plate 21 in the clearance position, can the first program lock 3 be rotated to the key release position and the key released. After the operator removes the key, it can be inserted into the second program lock 4 to open the emergency interface door, thereby exposing the emergency power interface 5 for emergency power supply connection. Through this mechanical interlocking relationship, it is ensured that the grounding switch is opened before the emergency interface door is opened, thus preventing a ground short circuit caused by connecting to the generator car before the grounding switch is opened and the line is still grounded.

[0030] like Figure 3As shown, the first program lock 3 in this embodiment includes a lock cylinder 31, a drive shaft 32, a spring 321, a spring retainer 322, a pin spring 33, a pin 34, a cam 35, and a tongue 36. The lock cylinder 31 is rotatably disposed within the first program lock 3 and is used for key insertion and rotation under the action of the correct key. The pin 34 is disposed on one side of the lock cylinder 31, and the pin spring 33 abuts against the pin 34, driving the pin 34 to move toward the lock cylinder 31. Through the cooperation of the pin 34 and the lock cylinder 31, a mechanical locking structure can be formed, so that only after a key matching the lock cylinder 31 is inserted can the pin 34 be in the position that allows the lock cylinder 31 to rotate, thereby enabling the lock cylinder 31 to rotate. The cooperation of the pin 34 and the pin spring 33 can adopt an existing pin tumbler lock cylinder structure, and this embodiment does not particularly limit it.

[0031] A cam 35 is connected to the tail of the lock cylinder 31, and the cam 35 is driven by the drive shaft 32. The drive shaft 32 is connected to the tongue 36. When the lock cylinder 31 rotates under the action of the key, the lock cylinder 31 drives the cam 35 to rotate synchronously. The cam 35 pushes the drive shaft 32 to move in a predetermined direction, and the drive shaft 32 further drives the tongue 36 to extend or retract. Thus, the rotational motion of the lock cylinder 31 can be converted into the linear extension and retraction motion of the tongue 36 through the cam 35 and the drive shaft 32. A spring flange 322 is formed on the drive shaft 32, and a spring 321 is sleeved on the drive shaft 32, with one end of the spring 321 abutting against the spring flange 322. The spring 321 is used to apply a restoring force to the drive shaft 32, so that the drive shaft 32 can be reset after the lock cylinder 31 rotates in the opposite direction or after the driving force is released, thereby driving the tongue 36 to retract or remain in a predetermined position.

[0032] The tongue 36 is a key structure in the first program lock 3 that cooperates with the stop plate 21. The tongue 36 can extend or retract under the drive of the drive shaft 32. The extension path of the tongue 36 corresponds to the position of the stop plate 21. When the stop plate 21 is in the blocking position, it is positioned on the extension path of the tongue 36, preventing the tongue 36 from extending to its full position. When the stop plate 21 is in the yielding position, it yields to the extension path of the tongue 36, allowing the tongue 36 to extend to its full position. Since whether the tongue 36 can extend to its full position directly affects whether the drive shaft 32 can move to its full position, and the drive shaft 32 is in a transmission cooperation with the cam 35, when the tongue 36 is blocked by the stop plate 21 and cannot extend to its full position, the drive shaft 32 also cannot move to its full position. The cam 35 is restricted in the reverse direction by the drive shaft 32, and the lock cylinder 31 cannot continue to rotate to the key release position. At this time, the key cannot be removed from the first program lock 3.

[0033] like Figure 4The diagram illustrates the structural relationship of the first program lock 3 in the unlocked state in this embodiment. In this state, the grounding switch operating shaft 2 has not rotated to the predetermined position for opening the corresponding grounding switch; the grounding switch may still be in the closed grounding state or not fully opened. At this time, the baffle 21 is in the blocking position along with the grounding switch operating shaft 2, and the baffle 21 is located on the extension path of the tongue 36. When the operator attempts to turn the key of the first program lock 3, the lock cylinder 31 drives the cam 35 to rotate, the cam 35 attempts to push the drive shaft 32 to move, and the drive shaft 32 attempts to drive the tongue 36 to extend outward. However, because the baffle 21 is in the blocking position, the tongue 36 is blocked by the baffle 21 when it extends and cannot extend to the correct position. The inability of the tongue 36 to extend to the correct position will cause the drive shaft 32 to be unable to move to the correct position, which in turn will cause the cam 35 and the lock cylinder 31 to be unable to rotate to the key release position. Therefore, the key cannot be removed from the first program lock 3.

[0034] The aforementioned mechanical restriction in the unlocked state enables the first layer of safety protection: when the grounding switch operating shaft 2 is not rotated to the grounding switch open position, i.e., when the line may still be in a grounded state, the first program lock 3 cannot release the key, the operator cannot use the key to open the second program lock 4, the emergency interface door cannot be opened, and the emergency power interface 5 cannot be connected to the generator truck. This prevents the generator truck from being connected when the grounding switch is not open, thus preventing the generator truck's output power from directly forming a ground short circuit through the grounding circuit.

[0035] like Figure 5 The diagram illustrates the structural relationship of the first program lock 3 in the unlocked state in this embodiment. In this state, the grounding switch operating shaft 2 has rotated to the predetermined position for the corresponding grounding switch to open, the grounding switch is in the open state, and the line related to the emergency power interface 5 is no longer grounded through the grounding switch. At this time, the baffle 21 rotates with the grounding switch operating shaft 2 to the avoidance position, and the baffle 21 avoids the extension path of the tongue 36. When the operator turns the key of the first program lock 3, the lock cylinder 31 can drive the cam 35 to continue rotating, the cam 35 can push the drive shaft 32 to move in a predetermined direction, and the drive shaft 32 can drive the tongue 36 to extend smoothly into place. Since the tongue 36 is not blocked by the baffle 21, the lock cylinder 31 can rotate to the key release position, and the key can be pulled out of the first program lock 3.

[0036] After the key is released from the first program lock 3, the operator inserts the key into the second program lock 4 and opens the emergency interface door through the second program lock 4. Once the emergency interface door is open, the emergency power interface 5 is exposed, allowing the operator to connect the generator's power cable to the emergency power interface 5 for emergency power supply. Since the key can only be removed from the first program lock 3 if the grounding switch operating shaft 2 has already rotated to the predetermined position for the corresponding grounding switch to open, the fact that the emergency interface door can be opened itself indicates that the grounding switch has completed the opening operation, thus improving the safety of the emergency power connection process.

[0037] In this embodiment, the baffle 21 includes a plate body fixedly connected to the grounding switch operating shaft 2 and a flange disposed at one end of the plate body. The flange can rotate synchronously with the plate body and the grounding switch operating shaft 2. When the grounding switch operating shaft 2 is not in the open position, the flange rotates to the extension path of the tongue 36, blocking the tongue 36; when the grounding switch operating shaft 2 is in the open position, the flange rotates to a position that avoids the extension path of the tongue 36, allowing the tongue 36 to extend into place. That is to say, the position change of the flange relative to the tongue 36 reflects the rotation position of the grounding switch operating shaft 2. The first program lock 3 realizes the mechanical judgment of the position of the grounding switch operating shaft 2 through the mechanical interference or avoidance relationship between the tongue 36 and the flange.

[0038] Furthermore, the flange has a limiting surface that mates with the tongue 36. When the tongue 36 extends into position, it is located on the rotation path of this limiting surface. At this time, if the grounding switch operating shaft 2 has a rotational tendency, the baffle 21 will also have a rotational tendency along with the grounding switch operating shaft 2, and the flange limiting surface on the baffle 21 will abut against the tongue 36. Since the tongue 36 has been extended by the first program lock 3 and is held in the predetermined position, the flange is restricted by the tongue 36, the baffle 21 cannot continue to rotate, and the grounding switch operating shaft 2 cannot continue to rotate. Thus, this embodiment not only ensures that the emergency interface door cannot be opened when the grounding switch is not tripped, but also restricts the grounding switch operating shaft 2 from rotating again after the emergency interface door is opened or the generator is connected, through the limiting effect of the tongue 36 on the baffle 21, preventing the operator from accidentally closing the grounding switch.

[0039] This limiting relationship forms a second layer of safety protection: after the key is released from the first program lock 3, the tongue 36 has extended into place and forms a limiting engagement with the stop plate 21. At this time, the key has been removed and used to open the second program lock 4, while the first program lock 3 remains locked, and the tongue 36 cannot retract arbitrarily. Because the tongue 36 restricts the rotation of the stop plate 21 and the grounding switch operating shaft 2, even if someone attempts to operate the grounding switch through the grounding switch operating shaft 2, the grounding switch operating shaft 2 will be mechanically limited by the stop plate 21 and the tongue 36, preventing accidental closing. This prevents the grounding switch from being accidentally closed and causing a ground short circuit while the generator car is connected or supplying power.

[0040] In this embodiment, the first program lock 3 and the second program lock 4 are sequentially interlocked using the same key. The operation process is as follows: In the initial state, the emergency interface door is closed, the second program lock 4 is locked, and the emergency power interface 5 is blocked. The key is located in the first program lock 3, or can only be removed from the first program lock 3 after the first program lock 3 meets certain conditions. When the generator car needs to be connected, the operator first operates the grounding switch to open via the grounding switch operating shaft 2, causing the grounding switch operating shaft 2 to rotate to the predetermined position corresponding to the grounding switch opening. At this time, the baffle 21 rotates with the grounding switch operating shaft 2 to the avoidance position, avoiding the extension path of the tongue 36. The operator then turns the key of the first program lock 3, and the lock cylinder 31, through the cam 35 and drive shaft 32, drives the tongue 36 to extend into place, the first program lock 3 rotates to the key release position, and the key can be removed from the first program lock 3.

[0041] After the key is removed, the tongue 36 of the first program lock 3 remains extended and engages with the stop plate 21 to limit the rotation of the grounding switch operating shaft 2. The operator inserts the key into the second program lock 4, opens the emergency interface door, and exposes the emergency power interface 5. Subsequently, the operator can connect the generator truck cable to the emergency power interface 5 for emergency power supply. Since the grounding switch operating shaft 2 has been confirmed and locked in the open position by the first program lock 3 before the generator truck is connected, it is possible to prevent the generator truck from supplying power to the grounding circuit.

[0042] After the emergency power supply is completed, the operator first disconnects the generator from the emergency power interface 5, then closes the emergency interface door and relocks it using the second program lock 4. After the second program lock 4 is locked, the key can be removed from it. The operator then inserts the key back into the first program lock 3, and rotates the lock cylinder 31 in the reverse direction, causing the cam 35 to move in the reverse direction. The drive shaft 32 resets under the action of the spring 321, and the tongue 36 retracts, thus releasing the tongue 36 from its restriction on the stop plate 21. At this time, the grounding switch operating shaft 2 returns to an operable state, and the operator can perform subsequent operations on the grounding switch as needed for maintenance or operation. This sequence ensures that the restriction of the first program lock 3 on the grounding switch operating shaft 2 cannot be released before the emergency interface door is closed and locked, thereby preventing accidental operation of the grounding switch during emergency power supply access.

[0043] It should be noted that the first program lock 3 in this embodiment adopts a mechanical structure consisting of a lock cylinder 31, pins 34, pin springs 33, a cam 35, a drive shaft 32, and a tongue 36. This is only one specific way to realize the function of the first program lock 3. The lock cylinder 31 can be a pin tumbler lock cylinder or other mechanical lock cylinders that can realize key recognition and rotation control; the cam 35 can be an eccentric cam, a shift fork, or other transmission structure that can convert the rotation of the lock cylinder 31 into linear movement of the drive shaft 32; the tongue 36 can be a plate-shaped lock tongue, a columnar bolt, or other telescopic component that can form a blocking and limiting cooperation with the stop plate 21. As long as the function of "the lock cylinder 31 rotates to drive the tongue 36 to extend and retract, and the lock cylinder 31 cannot rotate to the key release position when the tongue 36 is blocked by the stop plate 21" can be applied to this utility model.

[0044] Similarly, the specific shape of the baffle 21 is not limited to the form shown in the attached drawings. The baffle 21 can be plate-shaped, disc-shaped, cam-shaped, or other structures that can rotate with the grounding switch operating shaft 2 and enter or avoid the extension path of the tongue 36 at different rotation positions. The flange on the baffle 21 can be an integrally formed protrusion, or it can be a limiting block, edge, or shoulder fixedly connected to the baffle 21. As long as the flange can block the tongue 36 from extending when the grounding switch operating shaft 2 is not in the open position, avoid the extension path of the tongue 36 when the grounding switch operating shaft 2 is in the open position, and form a limiting engagement with the tongue 36 after the tongue 36 extends, it is an equivalent implementation of this embodiment.

[0045] In this embodiment, the emergency power interface 5 can be multiple plug-in power interfaces, or other wiring terminals, socket assemblies, or quick-connect assemblies suitable for connection to a generator vehicle or external emergency power equipment. The number, arrangement, and specific specifications of the emergency power interfaces 5 can be selected according to the voltage level, number of phases, capacity of the emergency interface cabinet, and the generator vehicle access method. The emergency power interface 5 shown in the figure is only used to illustrate its installation location and its obstruction relationship with the emergency interface door, and is not intended to limit the specific structure of the emergency power interface 5.

[0046] Through the above structure, this embodiment achieves two aspects of safety interlocking. First, when the grounding switch operating shaft 2 is not rotated to the open position, the baffle 21 blocks the tongue 36 from extending, preventing the first program lock 3 from releasing the key and the operator from opening the second program lock 4 and the emergency interface door, thus preventing the generator truck from being connected under grounding conditions. Second, after the grounding switch operating shaft 2 is rotated to the open position and the first program lock 3 releases the key, the tongue 36 extends and restricts the rotation of the baffle 21 and the grounding switch operating shaft 2, preventing accidental closing of the grounding switch during emergency power connection or generator truck power supply. Therefore, this embodiment can achieve reliable anti-misoperation protection using mechanical program locks and mechanical limit structures without the need for a complex electrical control system. It has a simple structure, high safety, and is suitable for electrical cabinets, distribution cabinets, or similar emergency power supply equipment that require emergency connection to a generator truck.

[0047] The above description is merely an embodiment of this application and is not intended to limit the scope of protection of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. An emergency interface cabinet with a safety lock, comprising a cabinet body (1), a grounding switch operating shaft (2) disposed on the cabinet body (1), a first program lock (3), and an emergency power interface (5), characterized in that: A baffle (21) is fixedly provided on the grounding switch operating shaft (2). The baffle (21) rotates synchronously with the grounding switch operating shaft (2). The first program lock (3) is provided with a retractable tongue (36). The baffle (21) switches between blocking and yielding positions as the grounding switch operating shaft (2) rotates; When the grounding switch operating shaft (2) is not rotated to the predetermined position for the corresponding grounding switch to open, the baffle (21) is in the blocking position and located on the extension path of the tongue (36) to prevent the tongue (36) from extending into place, so that the first program lock (3) cannot be rotated to the key release position. When the grounding switch operating shaft (2) rotates to the predetermined position for the corresponding grounding switch to open, the baffle (21) is in the avoidance position and avoids the extension path of the tongue (36), so that the tongue (36) can extend into place and the first program lock (3) can rotate to the key release position.

2. The emergency interface cabinet with a safety lock according to claim 1, characterized in that: The baffle (21) includes a plate body fixedly connected to the grounding switch operating shaft (2) and a flange disposed at one end of the plate body. The flange is used to enter or avoid the extension path of the tongue (36) as the plate body rotates.

3. The emergency interface cabinet with a safety lock according to claim 1, characterized in that: The cabinet (1) is provided with an emergency interface door for covering the emergency power interface (5). The emergency interface door is provided with a second program lock (4). The first program lock (3) and the second program lock (4) share the same key. The first program lock (3) is rotated to the key release position to release the key. The key is used to open the second program lock (4).

4. The emergency interface cabinet with a safety lock according to claim 2, characterized in that: The flange has a limiting surface that engages with the tongue (36). After the tongue (36) extends into place, it is located on the rotation path of the limiting surface so as to abut against the limiting surface when the baffle (21) has a rotational tendency, thereby restricting the rotation of the baffle (21) and the grounding switch operating shaft (2).

5. The emergency interface cabinet with a safety lock according to claim 1, characterized in that: The first program lock (3) is provided with a rotatable lock cylinder (31). The tail of the lock cylinder (31) is connected to a cam (35). The cam (35) is driven by a drive shaft (32). The drive shaft (32) is connected to the tongue (36). When the lock cylinder (31) rotates, the cam (35) pushes the drive shaft (32) to move in a predetermined direction, and the drive shaft (32) drives the tongue (36) to extend or retract.

6. The emergency interface cabinet with a safety lock according to claim 5, characterized in that: A spring flange (322) is formed on the drive shaft (32), and a spring (321) is provided on the drive shaft (32). One end of the spring (321) abuts against the spring flange (322) to drive the drive shaft (32) to reset. The first program lock (3) is provided with a tumbler (34) that cooperates with the lock cylinder (31). The tumbler (34) abuts against the tumbler spring (33), and the tumbler spring (33) is used to drive the tumbler (34) to move toward the lock cylinder (31).

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