Grounding switch locking device

Abstract

The utility model provides a grounding switch locking device, and belongs to the technical field of electrical equipment. The grounding switch locking device comprises a cabinet body, a cabinet door and a grounding switch, the cabinet door is hinged to the cabinet body, a rotating shaft is arranged at the outer end of the grounding switch and fixedly connected with a disconnecting link of the grounding switch, a handle is fixedly connected to the rotating shaft, a transparent window capable of being opened is arranged outside the handle in a covering mode, and the transparent window is fixedly connected with the cabinet door. The handle is provided with a spring pin which is in pin joint with the cabinet body, and a linkage mechanism is arranged between the cabinet door and the rotating shaft. The grounding switch has the following effects that the grounding switch is linked with the cabinet door through the linkage mechanism and is in pin joint with the cabinet body through the spring pin on the handle, so that double insurance is realized, the situation that the grounding is influenced by slight action of the cabinet door is avoided, the situation that the grounding switch is mistakenly switched off by other people is also avoided, the safety is improved, and the safety is ensured. And the state of the grounding switch can be visually seen through the transparent window.

Description

Technical Field

[0001] This application relates to the field of electrical equipment technology, and more specifically, to a grounding switch locking device. Background Technology

[0002] To prevent electric shock, electrical switchgear is usually equipped with a grounding switch, which is also typically equipped with a locking device to prevent electric shock from occurring if the circuit is not disconnected during maintenance.

[0003] In response, Chinese patent application number CN202210919456.2 discloses a grounding switch locking device for electrical switchgear. This solution mainly utilizes a rubber rotary rod to facilitate maintenance personnel to move the threaded conductive block inside the device body downwards to contact the grounding conductor plate before maintaining the electrical switchgear. This design avoids the safety hazard of maintenance personnel touching the cabinet rashly when the electrical switchgear is not grounded, which could lead to electric shock accidents.

[0004] However, in the process of implementing the technical solutions in the embodiments of this application, the inventors of this utility model discovered that the above-mentioned technology has at least the following technical problems:

[0005] The rubber swivel rod is fixed to the cabinet door. Grounding can only take effect when the cabinet door is fully opened. Therefore, if the cabinet door is deflected due to a person's collision during maintenance, the grounding will fail, which is not very safe. Utility Model Content

[0006] To overcome the above deficiencies, this application provides a grounding switch locking device, which aims to improve the problems mentioned in the background art.

[0007] This application provides a grounding switch locking device, including a cabinet, a cabinet door, and a grounding switch. The cabinet door is hinged to the cabinet. A rotating shaft is provided at the outer end of the grounding switch and is fixedly connected to the knife switch of the grounding switch. A handle is fixedly connected to the rotating shaft. The handle is covered with an openable transparent window. A spring pin is provided on the handle and is pinned to the cabinet. A linkage mechanism is provided between the cabinet door and the rotating shaft.

[0008] In one specific implementation, the spring pin includes a pin rod and a spring, the pin rod being telescopically connected to the handle, and the spring abutting against the pin rod.

[0009] In one specific implementation, the pin is pinned to the cabinet when the grounding switch is grounded.

[0010] In the above process, when the grounding switch is fully in place, the spring pushes the pin outward and inserts it into the cabinet to achieve pin connection and lock the grounding state. When there is no grounding, the pin cannot be inserted into the cabinet, so the handle is unlocked and moves with the grounding switch. This eliminates the need for personnel to operate the spring pin when opening the cabinet door, thus simplifying the operation.

[0011] In one specific embodiment, the spring pin further includes a lever, which is fixedly connected to the pin and is located outside the handle.

[0012] In one specific implementation, a sensor coupled to the lever is also provided on the cabinet.

[0013] In the above implementation process, the lever is used to move the pin, the sensor is a proximity switch, which is used to detect whether the pin is in place, so as to determine whether the grounding switch and the spring pin are in place. The proximity switch is electrically connected to an alarm to remind personnel of the status of the proximity switch.

[0014] In one specific implementation, the linkage mechanism includes a transmission rod and gears. The transmission rod is rotatably connected to the cabinet. Two gears are provided, and the two gears are respectively fixedly connected to the rotating shaft and one end of the transmission rod, and the two gears mesh with each other.

[0015] In the above implementation process, when the grounding switch's disconnector is activated, it drives the rotating shaft to move. The action of the disconnector is transmitted to the front cabinet door through the meshing of two gears and the transmission rod.

[0016] In one specific implementation, a limiting plate is fixedly connected to the other end of the transmission rod, a locking plate is fixedly connected to the cabinet door, the limiting plate has a clearance groove adapted to the locking plate, and the locking plate abuts against the limiting plate.

[0017] In the above process, if the grounding switch is not grounded when the cabinet door is opened, the locking plate will be blocked by the limiting plate and the cabinet door cannot be opened. Personnel will be prompted to check the grounding switch to confirm whether it is grounded. If the grounding switch is grounded, the clearance groove on the limiting plate will rotate to the locking plate, so that the locking plate can rotate and the cabinet door can be opened normally.

[0018] In one specific implementation, the gap angle between the positioning plate and the limiting plate is less than 10 degrees.

[0019] In the above implementation process, since the cabinet door is usually equipped with a lock, if the cabinet door cannot be opened, it is impossible to distinguish whether the problem is due to the lock or the grounding switch not being closed properly. Therefore, a 10-degree gap angle is left here so that the cabinet door can be opened 10 degrees first to rule out the lock as the cause. If it can be opened further, it means that the grounding switch is grounded properly. If it cannot be opened further, it means that the grounding switch is not grounded properly.

[0020] Compared with the prior art, the beneficial effects of this application are: the grounding switch is linked to the cabinet door through the linkage mechanism, and is connected to the cabinet body through the spring pin on the handle, which realizes double insurance. That is, it avoids the situation where the grounding is affected by slight movement of the cabinet door, and also avoids the situation where other people accidentally disconnect the grounding switch, thus improving safety. The status of the grounding switch can also be seen intuitively through the transparent window. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0022] Figure 1 This is a first-view schematic diagram of the grounding switch locking device provided in the embodiments of this application;

[0023] Figure 2 A second-view schematic diagram of the grounding switch locking device provided in the embodiments of this application;

[0024] Figure 3 A schematic diagram of the grounding switch in the open state provided for an embodiment of this application;

[0025] Figure 4 A schematic diagram of the grounding state of the grounding switch provided in the embodiments of this application;

[0026] Figure 5 A schematic diagram illustrating the connection relationship between the handle and the spring pin, provided for an embodiment of this application.

[0027] In the diagram: 10-cabinet body; 20-cabinet door; 30-grounding switch; 40-rotating shaft; 50-handle; 60-spring pin; 61-pin rod; 62-spring; 63-lever; 70-linkage mechanism; 71-transmission rod; 72-gear; 73-limiting plate; 74-positioning plate; 80-sensor. Detailed Implementation

[0028] The technical solutions in the embodiments of this application will now be described with reference to the accompanying drawings.

[0029] Please see Figures 1-5 This application provides a grounding switch locking device, including a cabinet 10, a cabinet door 20, and a grounding switch 30. The cabinet door 20 is hinged to the cabinet 10. A rotating shaft 40 is provided at the outer end of the grounding switch 30 and is fixedly connected to the knife switch of the grounding switch 30. A handle 50 is fixedly connected to the rotating shaft 40. The handle 50 is covered with an openable transparent window. A spring pin 60 is provided on the handle 50 and is pinned to the cabinet 10. A linkage mechanism 70 is provided between the cabinet door 20 and the rotating shaft 40. The grounding switch 30 is linked to the cabinet door 20 through the linkage mechanism 70 and pinned to the cabinet 10 through the spring pin 60 on the handle 50, achieving double insurance. This avoids the situation where slight movement of the cabinet door 20 affects the grounding, and also avoids the situation where others accidentally disconnect the grounding switch 30, thus improving safety. The status of the grounding switch 30 can also be clearly seen through the transparent window.

[0030] Please see Figures 1-5 The spring pin 60 includes a pin rod 61 and a spring 62. The pin rod 61 is telescopically connected to the handle 50, and the spring 62 is pressed against the pin rod 61. When the grounding switch 30 is grounded, the pin rod 61 is pinned to the cabinet 10. When the grounding switch 30 is fully in position, the spring 62 pushes the pin rod 61 outward and inserts it into the cabinet 10, thus achieving pinning and locking the grounded state. When there is no grounding, the pin rod 61 cannot be inserted into the cabinet 10, so the handle 50 is unlocked and moves with the action of the grounding switch 30. This eliminates the need for personnel to operate the spring pin 60 when opening the cabinet door 20, simplifying the operation.

[0031] Please see Figures 1-5 The spring pin 60 also includes a lever 63, which is fixedly connected to the pin 61 and is located outside the handle 50. A sensor 80 is also installed on the cabinet 10 and coupled to the lever 63. The lever 63 is used to actuate the pin 61. The sensor 80 is a proximity switch used to detect whether the pin 61 is in position, thereby determining whether the grounding switch 30 and the spring pin 60 are in position. The proximity switch is electrically connected to an alarm to alert personnel to the status of the proximity switch.

[0032] Please see Figures 1-5 The linkage mechanism 70 includes a transmission rod 71 and gears 72. The transmission rod 71 is rotatably connected to the cabinet 10. Two gears 72 are provided, each fixedly connected to a rotating shaft 40 and one end of the transmission rod 71, respectively, and the two gears 72 mesh with each other. When the grounding switch 30 operates, it drives the rotating shaft 40 to move. Utilizing the meshing of the two gears 72 and the transmission rod 71, the operation of the grounding switch is transmitted to the front cabinet door 20.

[0033] Please see Figures 1-5The other end of the transmission rod 71 is fixedly connected to a limiting plate 73, and a locking plate 74 is fixedly connected to the cabinet door 20. The limiting plate 73 has a clearance groove that matches the locking plate 74, and the locking plate 74 abuts against the limiting plate 73. When the cabinet door 20 is opened, if the grounding switch 30 is not grounded, the locking plate 74 will be blocked by the limiting plate 73, and the cabinet door 20 cannot be opened. Personnel will be prompted to check the grounding switch 30 to confirm whether it is grounded. If the grounding switch 30 is grounded, the clearance groove on the limiting plate 73 will rotate to the locking plate 74, allowing the locking plate 74 to rotate, thereby allowing the cabinet door 20 to open normally.

[0034] Please see Figures 1-5 The gap angle between the locking plate 74 and the limiting plate 73 is less than 10 degrees. Since the cabinet door 20 is usually equipped with a lock, if the cabinet door 20 cannot be opened, it is impossible to distinguish whether the problem is due to the lock or the grounding switch 30 not being properly closed. Therefore, a 10-degree gap angle is left here so that the cabinet door 20 can be opened 10 degrees first to rule out the lock as the cause. If it can be opened further, it means that the grounding switch 30 is properly grounded. If it cannot be opened further, it means that the grounding switch 30 is not properly grounded.

[0035] The working principle of the grounding switch locking device is as follows: The transparent window is hinged to the cabinet 10. The grounding switch 30 can be grounded by the handle 50 or by motor control. The status of the grounding switch 30 is determined by observing whether the handle 50 deflects normally and whether the proximity switch is in position. If the proximity switch is in position, it means that the pin 61 has been inserted into the cabinet, thus locking the proximity switch. Unlock the cabinet door 20 and pull it open. If the grounding switch 30 is in position, the clearance groove on the limit plate 73 will rotate to the locking plate 74, allowing the locking plate 74 to rotate and thus allowing the cabinet door 20 to open normally. After the cabinet door 20 opens, it drives the locking plate 74. The deflection engages the limit plate 73, which in turn feeds back to the rotating shaft 40 via the transmission rod 71 and the feed rod, thus engaging the knife switch of the grounding switch 30 and preventing it from disconnecting the ground. Only after the cabinet door 20 is closed and the pin 61 is manually pulled out can the grounding switch 30 disconnect the ground, achieving double safety. In summary, the grounding switch 30 is linked to the cabinet door 20 through the linkage mechanism 70 and connected to the cabinet body 10 through the spring pin 60 on the handle 50, achieving double safety. This avoids the situation where slight movement of the cabinet door 20 affects the grounding and also prevents others from accidentally disconnecting the grounding switch 30, improving safety. The status of the grounding switch 30 can also be seen directly through the transparent window.

[0036] The above are merely embodiments of this application and are 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, improvements, or equivalent substitutions made within the spirit and principles of this application should be included within the scope of protection of this application. It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

Claims

1. A grounding switch locking device, characterized in that, The device includes a cabinet (10), a cabinet door (20), and a grounding switch (30). The cabinet door (20) is hinged to the cabinet (10). The grounding switch (30) has a rotating shaft (40) at its outer end, which is fixedly connected to the knife switch of the grounding switch (30). A handle (50) is fixedly connected to the rotating shaft (40). The handle (50) is covered with an openable transparent window. A spring pin (60) is provided on the handle (50) and is pinned to the cabinet (10). A linkage mechanism (70) is provided between the cabinet door (20) and the rotating shaft (40).

2. The grounding switch locking device according to claim 1, characterized in that, The spring pin (60) includes a pin (61) and a spring (62). The pin (61) is telescopically connected to the handle (50), and the spring (62) abuts against the pin (61).

3. The grounding switch locking device according to claim 2, characterized in that, The pin (61) is pinned to the cabinet (10) when the grounding switch (30) is grounded.

4. A grounding switch locking device according to claim 3, characterized in that, The spring pin (60) also includes a lever (63), which is fixedly connected to the pin (61) and is located outside the handle (50).

5. A grounding switch locking device according to claim 4, characterized in that, The cabinet (10) is also equipped with a sensor (80) coupled to the lever (63).

6. A grounding switch locking device according to claim 5, characterized in that, The linkage mechanism (70) includes a transmission rod (71) and a gear (72). The transmission rod (71) is rotatably connected to the cabinet (10). There are two gears (72). The two gears (72) are fixedly connected to the rotating shaft (40) and one end of the transmission rod (71), respectively. The two gears (72) mesh with each other.

7. A grounding switch locking device according to claim 6, characterized in that, The other end of the transmission rod (71) is fixedly connected to a limiting plate (73), and a locking plate (74) is fixedly connected to the cabinet door (20). The limiting plate (73) has a clearance groove that is compatible with the locking plate (74), and the locking plate (74) abuts against the limiting plate (73).

8. A grounding switch locking device according to claim 7, characterized in that, The gap angle between the positioning plate (74) and the limiting plate (73) is less than 10 degrees.

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