Switch cabinet interlocking device

Abstract

The utility model relates to a switch cabinet interlocking device which comprises a base, an isolation shaft and a grounding shaft are rotatably arranged on the base, a locking piece and a guide piece are slidably arranged on the base, a cam piece is relatively and fixedly arranged on the grounding shaft, and the cam piece directly or indirectly abuts against or is separated from the locking piece after rotating. A guide piece is arranged on the base, a locking piece is arranged on the guide piece, an interlocking plate is fixedly or integrally arranged on the locking piece, a locking plate is rotationally arranged on the base, the locking plate directly or indirectly abuts against the guide piece or the interlocking plate after rotating, and the locking plate and the cam piece respectively form constraint on two sliding directions of the locking piece. By adopting the above technical scheme, whether the isolating switch and the grounding switch are conducted or not is controlled by rotating the isolating shaft and the grounding shaft, and the five-prevention interlocking function of the switch cabinet is realized by utilizing the bidirectional constraint of the cam member and the lock plate on the lock member and the pressing and locking cooperation of the guide member, the isolating shaft and the grounding shaft.

Description

Technical Field

[0001] This utility model belongs to the field of switch cabinet technology, and in particular relates to a switch cabinet interlocking device. Background Technology

[0002] In current switchgear designs, to achieve safety interlocking between the upper isolating mechanism, circuit breaker, and cabinet door, and to prevent misoperation such as the cabinet door being unable to open when the circuit breaker has not tripped, a four-axis shaft drive-based interlocking mechanism is commonly used. This mechanism has too many parts: four-axis shafts, bushings, connecting rods, and multiple fasteners, resulting in high material management and assembly costs. Furthermore, installation is complex; the four-axis shafts need precise alignment with multiple bushings, and the angles of each support need to be adjusted individually during installation, which is time-consuming and labor-intensive, requiring highly skilled assembly personnel. Cumulative errors also exist: accumulated errors in the assembly of multiple parts may lead to unsmooth or incomplete interlocking action, affecting reliability and making maintenance inconvenient. Utility Model Content

[0003] The purpose of this utility model is to overcome the defects of the prior art by providing a switch cabinet interlocking device that solves the problem of complex installation caused by too many parts in the interlocking mechanism of the four-axis drive.

[0004] The technical solution of this utility model is as follows: a switch cabinet interlocking device, including a base, an isolation shaft and a grounding shaft rotatably arranged on the base, a locking element and a guide element slidably arranged on the base, and a cam element relatively fixed on the grounding shaft. After the cam element rotates, it directly or indirectly abuts against or separates from the locking element.

[0005] It also includes a first elastic member and a second elastic member. The two ends of the first elastic member are respectively fixed relative to the guide and the base. The two ends of the second elastic member are respectively fixed relative to the lock and the base. The lock is fixed or integrally provided with an interlocking plate. The base is rotatably provided with a locking plate. After the locking plate rotates, it directly or indirectly presses against the guide or the interlocking plate. The locking plate and the cam member together constrain the sliding of the lock.

[0006] The guide slides under the combined action of the locking plate and the first elastic member, pressing against or separating from the isolation shaft and the grounding shaft, thereby locking and releasing the rotation of the isolation shaft and the grounding shaft.

[0007] By adopting the above technical solution, the isolating shaft, grounding shaft, locking element, and guide element are integrated on the same base. The isolating shaft and grounding shaft are respectively connected to the isolating switch and the grounding switch. The conduction of the isolating switch and the grounding switch can be controlled by rotating the isolating shaft and the grounding shaft. The cam element and the locking plate provide bidirectional constraint on the locking element, and the guide element and the isolating shaft and grounding shaft provide a pressing and locking cooperation, thus realizing the five-proof interlocking function of the switch cabinet. Compared with the traditional four-axis transmission mechanism, the number of parts is greatly reduced, avoiding complex shaft alignment adjustment, simplifying installation, and ensuring reliable mechanical linkage, small error accumulation, and smooth operation.

[0008] Further features of this invention include an opening switch and a closing switch, each equipped with a corresponding transmission assembly. The opening switch drives the locking plate to rotate via its transmission assembly. The transmission assembly includes a trip plate for transmitting the action of the opening switch. After the locking member slides toward the side closer to the grounding shaft, the trip plate abuts against the interlocking plate when it is activated.

[0009] By adopting the above-mentioned further configuration, the interlocking plate blocks the tripping plate, preventing the interlocking plate from transmitting the rotation of the locking plate. When the door is opened, it avoids the circuit breaker from being opened due to misoperation of the opening switch, thus preventing circuit breaker misoperation.

[0010] A further feature of this invention is that the locking plate is rotatably mounted on the base via an opening and closing gate shaft, and an opening slot is provided on the interlocking plate. After the interlocking plate moves toward the side closer to the grounding shaft, the opening and closing gate shaft abuts against the inner wall of the opening slot.

[0011] With the above-mentioned further configuration, the cooperation between the opening slot and the opening / closing shaft can limit the sliding stroke and sliding distance of the interlocking plate, ensuring the accurate displacement position of the interlocking plate and the locking components.

[0012] A further feature of this invention is that a screw is threaded onto the end of the locking member furthest from the grounding shaft.

[0013] With the above-mentioned further configuration, by assembling the screw, the screw can be used as a locking structure for the switch cabinet door. The extension length of the locking part can be adjusted by rotating the screw, thereby compensating for assembly tolerances and ensuring that the switch cabinet door is reliably pressed or unlocked.

[0014] A further feature of this invention is that the two contact points between the locking plate, the interlocking plate, and the guide are arc-shaped structures.

[0015] With the above-mentioned further design, the arc-shaped structure can reduce friction during pressure, making the movement smoother and preventing jamming.

[0016] A further feature of this invention is that the locking element and the guide element slide relative to the base in the same straight line direction.

[0017] With the above-mentioned further design, the linear sliding design simplifies the motion trajectory, facilitates assembly and debugging, and improves interlock reliability. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of a specific embodiment of the present utility model;

[0019] Figure 2 This is a schematic diagram of the overall structure from another perspective of a specific embodiment of the present utility model;

[0020] Figure 3 This is a schematic diagram of the overall structure of the lock component in a specific embodiment of this utility model;

[0021] Figure 4 This is a schematic diagram of the overall structure of the guide component in a specific embodiment of this utility model.

[0022] In the diagram: 1. Base; 2. Locking element; 3. Guide element; 4. Isolation shaft; 5. Grounding shaft; 6. Cam element; 7. Locking plate; 8. First elastic element; 9. Second elastic element; 10. Interlocking plate; 11. Opening switch; 12. Tripping plate; 13. Opening slot; 14. Opening / closing shaft; 15. Closing switch; 21. Screw. Detailed Implementation

[0023] The technical solutions in this embodiment will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0024] It should be noted that in the description of this utility model, all directional indicators (such as up, down, forward, backward, etc.) are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0025] Furthermore, in this utility model, the use of terms such as "first," "second," etc., is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. In the description of this utility model, "a number" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0026] Furthermore, the technical solutions of the various embodiments of this utility model can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0027] This embodiment provides a switchgear interlocking device, such as... Figure 1-4 As shown, it includes a base 1, on which an isolation shaft 4 and a grounding shaft 5 are rotatably mounted. The isolation shaft 4 and the grounding shaft 5 are respectively connected to an isolating switch and a grounding switch, and serve as the operating gates of the switches. The circuit is turned on by rotating the isolation shaft 4 and the grounding shaft 5.

[0028] The base 1 is slidably provided with a locking element 2 and a guide element 3 along the same straight line. Both the locking element 2 and the guide element 3 can be formed by sheet metal. The end of the locking element 2 is equipped with a screw 21. The extension length of the end of the locking element 2 can be adjusted by rotating the screw 21, thereby compensating for assembly tolerances and ensuring that the switch cabinet door is reliably pressed or unlocked.

[0029] A cam 6 is fixedly arranged on the grounding shaft 5. The cam 6 rotates together with the grounding shaft 5 and abuts against or separates from the locking member 2.

[0030] An interlocking plate 10 is fixedly or integrally provided on the locking member 2, and a locking plate 7 is rotatably provided on the base 1. The locking plate 7 rotates back and forth, respectively pressing against the guide member 3 or the interlocking plate 10. The locking plate 7 and the cam member 6 together constrain the linear sliding direction of the locking member 2. It should be noted that in this scheme, whether the guide member 3 and the locking plate 7 press against each other or not can realize the opening and closing of the circuit breaker in this switch cabinet.

[0031] It also includes a first elastic element 8 and a second elastic element 9. In this embodiment, both the first elastic element 8 and the second elastic element 9 are tension springs. The two ends of the first elastic element 8 are respectively fixed relative to the guide 3 and the base 1. The guide 3 slides and resets under the action of the locking plate 7 and the first elastic element 8. When the locking plate 7 rotates and presses against the guide 3, the guide 3 slides, and its end presses against the isolation shaft 4 and the grounding shaft 5 to lock the rotation of the isolation shaft 4 and the grounding shaft 5. At the same time, the tension spring deforms elastically. When the locking plate 7 rotates again and contacts and separates from the guide 3, the guide 3 resets under the action of the tension spring, and the end of the guide 3 separates from the contact of the isolation shaft 4 and the grounding shaft 5. At this time, the isolation shaft 4 and the grounding shaft 5 can rotate again.

[0032] The two ends of the second elastic member 9 are respectively fixed relative to the lock member 2 and the base 1. When the lock member 2 is pressed by the cam member 6 or the locking plate 7 on both sides, the lock member 2 slides and the tension spring is compressed or stretched. When neither the cam member 6 nor the locking plate 7 presses against the lock member 2, the lock member 2 is elastically reset by the tension spring that serves as the second elastic member 9.

[0033] Furthermore, the locking plate 7 is rotatably mounted on the base 1 via the opening and closing gate shaft 14. The interlocking plate 10 has an opening slot 13. After the interlocking plate 10 moves towards the side closer to the grounding shaft 5, the opening and closing gate shaft 14 enters the opening slot 13 and is limited by the inner wall of the opening slot 13.

[0034] This embodiment also includes an opening switch 11 and a closing switch 15. Both the opening switch 11 and the closing switch 15 are equipped with corresponding transmission components. The opening switch 11 drives the locking plate 7 to rotate through its transmission components. The transmission components include a trip plate 12 for transmitting the action of the opening switch 11. After the locking member 2 slides towards the side closer to the grounding shaft 5, the trip plate 12 abuts against the interlocking plate 10 when it is activated, thereby blocking the interlocking plate 10 from transmitting the signal of the locking plate 7 rotating. Thus, when the door is opened, the opening switch 11 is prevented from being misoperated and causing the circuit breaker to open, which can prevent the circuit breaker from being misoperated.

[0035] Working principle of this embodiment

[0036] 1. Circuit breaker closed state: When the circuit breaker is closed, the locking plate 7 is driven to rotate and press against the guide 3, so that one side of the guide 3 is inserted into the isolating shaft 4 and the grounding shaft 5, blocking the operation of the two shafts and locking the rotation of the two shafts. At the same time, the locking plate 7 does not impose a constraint on the interlocking plate 10, but the cam 6 presses against the locking piece 2 when the grounding shaft 5 is not grounded, so that the locking piece 2 is kept in the locked door position. In the closed state, it should be ensured that the door cannot be opened, that is, the locking piece 2 is in the locked door position. At this time, the isolating switch is in the closed state and the grounding switch is in the open state.

[0037] 2. Circuit breaker tripped and grounding switch not closed: After the locking plate 7 is rotated and reset, the locking plate 7 does not press against the guide 3. The circuit breaker trips, and the guide 3 moves away from the isolation shaft 4 under the action of the first elastic member 8, thus unlocking the rotation of the isolation shaft 4 and the grounding shaft 5.

[0038] 3. Grounding switch closed state: Operate the rotating isolating shaft 4 to open the isolating switch, and then operate the rotating grounding shaft 5 to close the isolating switch to the grounding position. The cam 6 rotates synchronously and separates from the locking member 2. At this time, operate the closing switch 15 of the circuit breaker mechanism to close the circuit, so that the locking plate 7 rotates to press against the guide 3 to close the circuit. The guide 3 locks the rotation of the isolating shaft 4 and the grounding shaft 5 again. At this time, the locking plate 7 does not press against the locking member 2. Under the action of the second elastic member 9, the locking member 2 slides towards the side closer to the grounding shaft 5, driving the interlocking plate 10 to move together.

[0039] 4. Open door state: When the locking piece 2 slides to the grounding shaft 5 side into place, the switch cabinet door is unlocked and can be opened normally for maintenance. At the same time, the interlocking plate 10 is on the trip plate 12 action path, so that the locking plate 7 cannot be rotated to open the circuit breaker, preventing accidental operation of the circuit breaker when the door is open.

[0040] 5. Closed state: When the door is closed, the screw 21 can be manually or by other means to be controlled to move and drive the lock 2 to reset. The screw 21 can be finely adjusted as needed. After the lock 2 is reset, the trip plate 12 is disengaged from the interlock plate 10, the trip plate 12 is released from lock, and then the opening and closing of the gate can be operated normally.

Claims

1. A switchgear interlocking device, comprising a base (1), wherein an isolation shaft (4) and a grounding shaft (5) are rotatably disposed on the base (1), characterized in that: A locking element (2) and a guide element (3) are slidably arranged on the base (1), and a cam element (6) is fixedly arranged on the grounding shaft (5). After the cam element (6) rotates, it directly or indirectly abuts against or separates from the locking element (2). It also includes a first elastic member (8) and a second elastic member (9). The two ends of the first elastic member (8) are respectively fixed relative to the guide member (3) and the base (1). The two ends of the second elastic member (9) are respectively fixed relative to the lock member (2) and the base (1). The lock member (2) is fixed or integrally provided with an interlocking plate (10). The base (1) is rotatably provided with a locking plate (7). After the locking plate (7) rotates, it directly or indirectly presses against the guide member (3) or the interlocking plate (10). The locking plate (7) and the cam member (6) together constrain the sliding of the lock member (2). The guide (3) slides under the combined action of the locking plate (7) and the first elastic member (8), pressing against or separating from the isolation shaft (4) and the grounding shaft (5), thereby locking and releasing the rotation of the isolation shaft (4) and the grounding shaft (5).

2. The switchgear interlocking device according to claim 1, characterized in that: It also includes an opening switch (11) and a closing switch (15). The opening switch (11) and the closing switch (15) are each provided with a transmission component. The opening switch (11) drives the locking plate (7) to rotate through its transmission component. The transmission component includes a trip plate (12) for transmitting the action of the opening switch (11). After the locking member (2) slides toward the side closer to the grounding shaft (5), the trip plate (12) abuts against the interlocking plate (10) when it is in action.

3. A switchgear interlocking device according to claim 1 or 2, characterized in that: The locking plate (7) is rotatably mounted on the base (1) via the opening and closing shaft (14). The interlocking plate (10) has an opening groove (13). After the interlocking plate (10) moves toward the side closer to the grounding shaft (5), the opening and closing shaft (14) abuts against the inner wall of the opening groove (13).

4. A switchgear interlocking device according to claim 1 or 2, characterized in that: The locking element (2) has a screw (21) threaded onto one end away from the grounding shaft (5).

5. A switchgear interlocking device according to claim 1, characterized in that: The two contact points between the locking plate (7), the interlocking plate (10), and the guide (3) are arc-shaped.

6. The switchgear interlocking device according to claim 1, characterized in that: The locking element (2) and the guide element (3) slide relative to the base (1) in the same straight direction.

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