Interlock mechanism for a grounding switch device

Abstract

This application discloses an interlocking mechanism for a grounding switch device, including a pair of lock bodies, a pair of switch devices, and a pair of interlocking devices. The pair of lock bodies share a single key. Each lock body is correspondingly installed on a switch device and engages with the switch device via a corresponding interlocking device. When the key is freely insertable and removable from the lock body, the lock body is in the open state. At this time, the interlocking device is suitable for locking the switch device, and the switch device is in the open state. When the key is inserted into the lock body and cannot be removed, the lock body is in the closed state. At this time, the interlocking device is suitable for unlocking the switch device, and the switch device is suitable for opening / closing. The beneficial effect of this application is that it ensures that at least one switch device is in the open state regardless of the circumstances, preventing the simultaneous closing of two interlocked switches, further ensuring the safety of personnel and the line.

Description

Technical Field

[0001] This application relates to the field of power equipment technology, and in particular to an interlocking mechanism for a grounding switch device. Background Technology

[0002] In new energy power generation projects, various transformers or wind turbines are connected via load switch cabinets to form a current collection line. Interlocking between upstream and downstream switches is essential, with the following principle: when the upstream switch is closed, the downstream switch cannot be closed; conversely, when the downstream switch is closed, the upstream switch cannot be closed. Existing methods often involve padlocks on the switch cabinet doors, which are heavily influenced by human error. Therefore, this paper proposes an interlocking mechanism for grounding switch devices to address these technical issues. Utility Model Content

[0003] One of the objectives of this application is to provide an interlocking mechanism for a grounding switch device.

[0004] To achieve the above objectives, the technical solution adopted in this application is as follows: an interlocking mechanism for a grounding switch device, comprising a pair of lock bodies, a pair of switch devices, and a pair of interlocking devices. The pair of lock bodies share a single key. Each lock body is correspondingly installed on the switch device and cooperates with the switch device through the corresponding interlocking device. When the key is freely insertable and removable from the lock body, the lock body is in an open state. At this time, the interlocking device is adapted to lock the switch device, and the switch device is in an open state. When the key is inserted into the lock body and cannot be removed, the lock body is in a closed state. At this time, the interlocking device is adapted to unlock the switch device, and the switch device is adapted to open / close.

[0005] Preferably, an open / close indicator plate is mounted on the main shaft of the switching device; the interlocking device includes an interlocking plate and a guide structure, the interlocking plate is mounted on the latch of the lock body, and the interlocking plate and the open / close indicator plate are connected through the guide structure; when the lock body is in the open state, the interlocking plate is adapted to lock the open / close indicator plate through the guide structure, at which time the switching device is in the open state and cannot be operated.

[0006] Preferably, the guiding structure includes a guide rod and a guide groove that cooperate with each other. The guide rod is installed on the side of the open / close indicator plate, and the guide groove is disposed on the interlocking plate. The guide groove includes an arc-shaped groove and a horizontal straight groove. When the lock body is in the closed state, the guide rod cooperates with the arc-shaped groove, and the switching device is suitable for opening / closing. When the lock body is in the open state, the guide rod cooperates with the straight groove and is misaligned with the arc-shaped groove to lock the open indicator plate.

[0007] Preferably, the side of the switching device is provided with a manual operation port; when the lock body is adapted to switch from the closed state to the open state, the interlocking plate is adapted to block the manual operation port.

[0008] Preferably, the side of the split / open indicator plate is provided with a screw hole, and a bolt is installed in the screw hole to form the guide rod.

[0009] Preferably, the split / join indicator plate includes an arc-shaped plate and an indicator element, wherein the indicator element is mounted on the side of the indicator element.

[0010] Preferably, a protective plate is installed on the side of the switching device, and the lock body is horizontally installed on the side of the protective plate near the switching device.

[0011] Preferably, the side of the protective plate is provided with a groove that mates with the indicator and the manual operation port.

[0012] Compared with the prior art, the beneficial effects of this application are as follows: This utility model incorporates a pair of lock bodies and a pair of interlocking devices. When the lock bodies are open, the interlocking devices lock the switch, and the switch is in an open state and cannot be operated. When the lock bodies are closed, the interlocking devices unlock the switch, allowing it to be opened or closed. This ensures that at least one switch is open, preventing simultaneous closing of two interlocked switches, thus further guaranteeing the safety of personnel and the circuit. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0014] Figure 2 This is a schematic diagram of the closed state of the switching device of this utility model.

[0015] Figure 3 This is a schematic diagram of the open state of the switching device of this utility model.

[0016] Figure 4This is a schematic diagram of the lock body in the open state of this utility model.

[0017] Figure 5 This is a schematic diagram of the guide structure of this utility model.

[0018] Figure 6 This is a schematic diagram of the specific structure of the guide groove of this utility model.

[0019] Figure 7 This is a schematic diagram of the separation and reassembly indicator plate of this utility model.

[0020] Figure 8 This is a schematic diagram illustrating the principle of opening and closing of the two-out-of-one mechanical lock of this utility model.

[0021] In the diagram: 1. Switching device; 101. Main shaft; 2. Protective plate; 3. Lock body; 301. Lock tongue; 4. Groove; 5. Interlocking device; 501. Interlocking plate; 502. Guide structure; 5021. Guide groove; 50211. Arc groove; 50212. Straight groove; 5022. Guide rod; 6. Opening / closing indicator plate; 601. Arc plate; 602. Indicator; 7. Manual operation port; 8. Bolt; 9. Key. Detailed Implementation

[0022] 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.

[0023] In the description of this application, it should be noted that the terms "center", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., which indicate the orientation and positional relationship based on the orientation or positional relationship shown in the accompanying drawings, 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, and should not be construed as limiting the specific protection scope of this application.

[0024] 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.

[0025] One preferred embodiment of this application, such as Figures 1 to 8As shown, an interlocking mechanism for a grounding switch device includes a pair of lock bodies 3, a pair of switch devices 1, and a pair of interlocking devices 5. The pair of lock bodies 3 share a key 9. The lock bodies 3 are installed on the switch devices 1 and cooperate with the switch devices 1 through the corresponding interlocking devices 5.

[0026] It should be noted that the pair of lock bodies 3 are "two-out mechanical locks", such as Figure 8 As shown in (a), when lock body 3 is in the closed state, key 9 cannot be removed. Figure 8 As shown in (b), the key 9 can only be freely inserted and removed from the lock body 3 when the lock body 3 is in the open state.

[0027] Understandably, when lock body 3 is in the open state, interlocking device 5 locks switch device 1, and switch device 1 is in the open state and cannot be operated. When lock body 3 is in the closed state, interlocking device 5 unlocks switch device 1, allowing switch device 1 to be opened or closed.

[0028] In other words, as long as the key 9 can be freely inserted and removed from the lock body 3 of a switch, that switch will be in the open state. Since the two lock bodies 3 share the same key 9, it can be guaranteed that at least one of them will be in the open state. This prevents the situation where the upper and lower interlocked switches are closed at the same time, further ensuring the safety of the staff and the circuit.

[0029] As a further description of the above embodiments: an opening / closing indicator plate 6 is installed on the main shaft 101 of the switching device 1; the interlocking device 5 includes an interlocking plate 501 and a guide structure 502. The interlocking plate 501 is installed on the latch 301 of the lock body 3, and the interlocking plate 501 and the opening / closing indicator plate 6 are connected through the guide structure 502.

[0030] Specifically, suppose one of the switching devices 1 is in the open state at this time, such as Figure 2 As shown, the lock body 3 is in the closed state and the key 9 is located on the lock body 3. To remove the key 9, it is necessary to turn the key 9 to open the lock body 3. During the turning of the key 9, the latch 301 will drive the interlocking plate 501 to move. The interlocking plate 501 can then lock the open / closed indicator plate 6 through the guide structure 502. Since the open / closed indicator plate 6 is connected to the main shaft 101 of the switch device 1, it can also be understood as locking the main shaft 101. After removing the key 9, the switch device 1 will remain in this open state and cannot be operated. Then, the key 9 can be inserted into another switch device 1 for operation.

[0031] Furthermore, a manual operation port 7 is generally provided on the side of the switch device 1. When the lock body 3 changes from the closed state to the open state, the interlock plate 501 will also move under the action of the lock tongue 301, thereby blocking the manual operation port 7 after the movement of the interlock plate 501. In this way, the operating handle cannot be inserted into the manual operation port 7 to perform the opening and closing operation.

[0032] This application does not specifically limit the above-described guide structure 502, but the following specific embodiment is provided for reference: like Figure 5 and Figure 6 As shown, the guide structure 502 includes a guide rod 5022 and a guide groove 5021 that cooperate with each other. The guide rod 5022 is installed on the split indicator plate 6, and the guide groove 5021 is disposed on the interlocking plate 501. The guide groove 5021 includes a connected arc-shaped groove 50211 and a horizontal straight groove 50212.

[0033] It is understandable that, such as Figure 2 and Figure 3 As shown, when the lock body 3 is in the closed state (i.e., the key 9 cannot be removed), the guide rod 5022 engages with the arc-shaped groove 50211, meaning that the switching device 1 can open or close at this time; during the opening or closing process, the guide rod 5022 will rotate along the arc-shaped groove 50211. When the lock body 3 is opened and the key 9 is removed, the switching device 1 must be in the open state; the reason is: Figure 2 As shown, the switch device 1 is in the closed state at this time. The guide rod 5022 on the open / close indicator plate 6 is located at the rightmost end of the arc-shaped groove 50211, meaning the guide rod 5022 will obstruct and interfere with the leftward movement of the interlocking plate 501. For example... Figure 3 As shown, when the switch device 1 is open, the open / close indicator plate 6 will rotate, thereby driving the guide rod 5022 to move to the leftmost end of the arc groove 50211. At this time, the guide rod 5022 and the straight groove 50212 correspond to each other, and the straight groove 50212 provides a clearance space for the guide rod 5022. That is, at this time, the interlocking plate 501 can move to the left under the action of the locking tongue 301, so that the key 9 in the switch device 1 is in the open state after being pulled out.

[0034] It should be noted that after the lock body 3 is opened, the interlocking plate 501 not only blocks the manual operation port 7, preventing the switch device 1 from operating, but also locks the open / closed indicator plate 6. Figure 4As shown, after the interlocking plate 501 moves to the left, the guide rod 5022 cooperates with the straight groove 50212, and the guide rod 5022 and the arc groove 50211 are misaligned. This will interfere with the rotation of the open / close indicator plate 6, thereby locking the open / close indicator plate 6. Through the double limiting effect, it can stably ensure that the switch device 1 is in the open state after the key 9 is pulled out.

[0035] like Figure 7 As shown, a screw hole is provided on the side of the open / close indicator plate 6, and a bolt 8 is installed in the screw hole to form a guide rod 5022. The connection method of the bolt 8 and the screw hole is simple and reliable, facilitating subsequent installation and maintenance. The open / close indicator plate 6 includes an arc-shaped plate 601 and an indicator 602. The indicator 602 is located on the side of the arc-shaped plate 601 and is connected to the main shaft 101 of the switch device 1. When the main shaft 101 rotates, the indicator 602 moves accordingly, thus visually displaying the open / closed state of the switch device 1. This design not only improves the ease of operation but also enables operators to quickly and accurately determine the switch status, further enhancing the safety and reliability of the system.

[0036] In this embodiment, as Figure 1 As shown, a protective plate 2 is installed on the side of the switch device 1, and the lock body 3 is horizontally installed on the side of the protective plate 2 near the switch device 1. This design can effectively protect the lock body 3 from interference and damage from the external environment, and also facilitates installation and subsequent operation by the staff. Furthermore, the side of the protective plate 2 is provided with a groove 4 that mates with the indicator 602 and the manual operation port 7. This design allows the indicator 602 and the manual operation port 7 to be exposed for operation and observation by the staff, while also increasing the aesthetics and neatness of the entire switch device 1.

[0037] The working principle of this utility model is as follows: The interlocking mechanism of this application is mainly used in the lower-level grounding switch, but it can also be used in the upper-level load switch. Its function is to realize the interlock between the two switch devices 1, thereby preventing human error.

[0038] Specifically: ① such as Figure 2 As shown, one of the switching devices 1 is in the closed state. At this time, the interlocking plate 501 is blocked by the guide rod 5022 (i.e., bolt 8) on the open / close indicator plate 6, so the mechanical lock cannot be opened and the interlocking plate 501 cannot be moved to the left. At this time, the key 9 on the "two-out-of-one mechanical lock" cannot be removed. ② As shown Figure 3As shown, insert the operating handle into the manual operation port 7, and rotate the operating handle counterclockwise to open the switch device 1. At the same time, the bolt 8 in the open / close indicator plate 6 also moves to the left end of the linear groove 50212. ③ As shown Figure 4 As shown, rotate the key 9 on the lock body 3 to open the lock body 3. At this time, the key 9 on the "two-out-of-one mechanical lock" can be pulled out, and the interlocking plate 501 blocks the manual operation port 7. At this time, the switch device 1 cannot be operated. ④ Insert the pulled-out key 9 into another switch device 1 and repeat the above operation.

[0039] 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. An interlocking mechanism for a grounding switch device, characterized in that, include: A pair of lock bodies, a pair of switching devices, and a pair of interlocking devices, wherein a pair of lock bodies share a key, and each lock body is correspondingly installed on the switching device and cooperates with the switching device through the corresponding interlocking device; When the key is suitable for freely inserting and removing the lock body, the lock body is in the open state; At this time, the interlocking device is suitable for locking the switching device, and the switching device is in the open state; When the key is inserted into the lock body and cannot be removed, the lock body is in the closed state; at this time, the interlocking device is adapted to unlock the switching device, and the switching device is adapted to open / close. An open / close indicator plate is mounted on the main shaft of the switching device; the interlocking device includes an interlocking plate and a guide structure. The interlocking plate is mounted on the latch of the lock body, and the interlocking plate and the open / close indicator plate are connected through the guide structure. When the lock body is in the open state, the interlocking plate is adapted to lock the open / close indicator plate through the guide structure. At this time, the switching device is in the open state and cannot be operated. The guiding structure includes a guide rod and a guide groove that cooperate with each other. The guide rod is installed on the side of the open / close indicator plate, and the guide groove is disposed on the interlocking plate. The guide groove includes an interconnected arc-shaped groove and a horizontal straight groove. When the lock body is in the closed state, the guide rod cooperates with the arc-shaped groove, and the switching device is suitable for opening / closing. When the lock body is in the open state, the guide rod cooperates with the straight groove and is misaligned with the arc-shaped groove to lock the open indicator plate.

2. The interlocking mechanism of the grounding switch device as described in claim 1, characterized in that: The side of the switch device is provided with a manual operation port; when the lock body is adapted to switch from the closed state to the open state, the interlocking plate is adapted to block the manual operation port.

3. The interlocking mechanism of the grounding switch device as described in claim 1, characterized in that: The side of the split indicator plate is provided with a screw hole, and a bolt is installed in the screw hole to form the guide rod.

4. The interlocking mechanism of the grounding switch device as described in claim 1, characterized in that: The split / join indicator plate includes an arc-shaped plate and an indicator element, which is mounted on the side of the indicator element.

5. The interlocking mechanism of the grounding switch device as described in claim 2, characterized in that: A protective plate is installed on the side of the switching device, and the lock body is horizontally installed on the side of the protective plate near the switching device.

6. The interlocking mechanism of the grounding switch device as described in claim 5, characterized in that: The protective plate has a groove on its side that mates with the indicator and the manual operation port.

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