Switch cabinet grounding switch operation alarm device

Abstract

The invention relates to the field of high-voltage switch cabinets, in particular to a switch cabinet grounding switch operation alarm device. The grounding switch operation alarm device of the switch cabinet comprises a base used for being installed on a cabinet body of the switch cabinet, a movable cover plate is installed on the base, and the cover plate has a covering position and an opening position in the moving stroke relative to the base. And an inductive switch for detecting the position of the cover plate and transmitting the position information to a background is arranged between the cover plate and the base. When operation is needed, the cover plate needs to be operated, due to the fact that the inductive switch is arranged, corresponding changes can be detected and transmitted to the background when the position of the cover plate is changed, correspondingly, the background can know before personnel operate the switch cabinet, information connection between the background and the site is enhanced, and the operation efficiency of the switch cabinet is improved. Therefore, the problem that in the prior art, when a background carries out power-off and power-on operation on a switch cabinet, the background is not clear about field conditions, so that power-off is not carried out or power-on is carried out in advance, and potential safety hazards exist is solved.

Description

Technical Field

[0001] This invention relates to the field of high-voltage switchgear, and more particularly to an alarm device for the operation of a grounding switch in a switchgear. Background Technology

[0002] High-voltage switchgear is widely used in power plants and transformer substations. Inside the switchgear are circuit breakers that control the on / off state of the main circuit and grounding switches that control the grounding of the control circuit. When a switchgear malfunctions and requires maintenance, the circuit breaker is typically kept open, the main circuit is de-energized, and then the grounding switch is manually operated to ground the circuit. Specifically, the switchgear is equipped with a grounding operation hole that allows operation of the grounding switch's grounding shaft. When grounding is required, an operating tool is inserted into the operation hole to switch the grounding switch.

[0003] Since the grounding switch is manually operated, the circuit breaker must be kept open before operating it. In existing technology, to ensure non-energized operation, a work order is typically submitted to apply for maintenance. The work order specifies the equipment number to be maintained and the estimated maintenance time. The system then uses this work order to trip the circuit breaker in the switchgear, tripping the target equipment within the estimated time, and restoring power after the estimated time has elapsed.

[0004] However, there is no information exchange or linkage between the back-end operation and the on-site maintenance. The back-end operation of the switchgear is entirely based on the information on the work order. If the on-site operation exceeds the time information filled in on the work order or if the work order is filled in incorrectly, it may cause the switchgear to be powered on or powered on in advance, resulting in safety hazards on the site. Summary of the Invention

[0005] The purpose of this invention is to provide an alarm device for the operation of a grounding switch in a switchgear, which solves the problem in the prior art where the back-end system is unaware of the on-site situation when performing power-off and power-on operations on the switchgear, resulting in safety hazards due to failure to power off or premature power-on.

[0006] To achieve the above objectives, the switchgear grounding switch operation alarm device of the present invention adopts the following technical solution: An alarm device for grounding switch operation of a switchgear includes a base for installation on the cabinet of the switchgear, a movable cover plate installed on the base, the cover plate having a covered position for blocking the grounding operation hole on the switchgear and an open position for exposing the grounding operation hole on the switchgear during its travel relative to the base, and an inductive switch for detecting the position of the cover plate and transmitting the position information to the back-end system between the cover plate and the base.

[0007] Furthermore, the base includes a fixing plate for attaching to the cabinet of the switch cabinet and an L-shaped mounting plate connected to the fixing plate. The inductive switch is mounted on the mounting plate. The mounting plate includes a first plate segment arranged perpendicular to the fixing plate and a second plate segment arranged perpendicular to the first plate segment. The second plate segment is provided with a guide structure for cooperating with the cover plate guide.

[0008] Furthermore, the second plate segment is provided with flanges on the upper and lower sides, and the cover plate is provided with cover plate side plates on the upper and lower sides. The flange on the upper side of the second plate segment is provided below the upper cover plate side plate to support the cover plate, or the flange on the lower side of the second plate segment is provided below the lower cover plate side plate to support the cover plate.

[0009] Furthermore, the guide structure includes a guide post fixedly disposed relative to the mounting plate, and the cover plate is provided with a guide groove for the guide post to pass through and to guide and cooperate with the guide post.

[0010] Furthermore, the inductive switch is disposed on the side of the second plate segment facing the fixed plate, and the guide post is disposed on the side of the second plate segment facing away from the fixed plate.

[0011] Furthermore, an mounting bracket is fixedly provided on the first plate segment. The mounting bracket is L-shaped and has a first bracket plate that fits against the first plate segment and a second bracket plate for fitting against or being arranged parallel to the second plate segment. The guide post is provided on the second bracket plate.

[0012] Furthermore, the second support plate is provided with threaded holes, and bolts are fitted into the threaded holes, with the bolt shank forming the guide post.

[0013] Furthermore, the inductive switch is fixedly mounted on the base, and the inductive switch is provided with an inductive contact. The cover plate is provided with a trigger element for pressing the inductive contact when in the open position. The trigger element has a trapezoidal cross section. The surface of the trigger element where the inclined waist of the trapezoid is located forms a guide inclined surface for switching the inductive contact from the released state to the pressed state. The surface of the trigger element where one of the base edges of the trapezoid is located forms a holding surface for holding the trigger element in the pressed state.

[0014] Furthermore, the base is provided with a first locking hole for assembling the lock body, and the cover plate is provided with a second locking hole for assembling the lock body. When the cover plate is in the covered position, the first locking hole and the second locking hole are arranged in close contact.

[0015] Furthermore, the fixing plate has an exposure hole in the middle for the grounding operation hole of the switch cabinet to be exposed. A locking plate is provided on the side of the base away from the mounting plate. The locking plate has a first locking hole for assembling the lock body. The cover plate has a second locking hole for assembling the lock body. When the cover plate is in the covered position, the first locking hole and the second locking hole are arranged in close contact.

[0016] The beneficial effects of the switchgear grounding switch operation alarm device in this invention are as follows: This invention innovatively proposes a switchgear grounding switch operation alarm device. By setting a base, it facilitates the installation of other components and provides space and position for the installation of the cover plate. The cover plate is movably set on the base and is provided with a covered position and an open position to facilitate the covering of the operation holes on the cabinet. When operation is required, the cover plate must be operated. Since a sensor switch is set, the corresponding change when the position of the cover plate changes can be detected and transmitted to the back-end. That is to say, when the grounding switch needs to be operated, the cover plate must be operated, and the movement of the cover plate will be transmitted to the back-end through the sensor switch. Accordingly, the back-end can know before the personnel operate the switchgear, which strengthens the information communication between the back-end and the field, and thus solves the problem in the prior art that the back-end is unaware of the field situation when operating the switchgear for power-off and power-on, resulting in safety hazards such as failure to power off or premature power-on. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of an embodiment of the alarm device for grounding switch operation in the switchgear of the present invention; Figure 2 This is a schematic diagram of another perspective of an embodiment of the alarm device for grounding switch operation in the switchgear of the present invention; Figure 3 This is a front view of an embodiment of the switchgear grounding switch operation alarm device of the present invention; Figure 4 This is a rear view of an embodiment of the switchgear grounding switch operation alarm device of the present invention; Figure 5 This is a schematic diagram of the base structure of an embodiment of the switchgear grounding switch operation alarm device of the present invention; Figure 6 This is a schematic diagram of the cover plate structure of an embodiment of the switchgear grounding switch operation alarm device of the present invention; Figure 7 This is a schematic diagram of the mounting bracket of an embodiment of the alarm device for grounding switch operation in the switchgear of the present invention.

[0018] In the diagram: 1. Base; 11. Fixing plate; 12. Mounting plate; 121. Flanged edge; 13. Exposed hole; 14. Locking plate; 15. First locking hole; 16. Bracket operating hole; 17. Bracket mounting hole; 18. Micro switch mounting hole; 2. Cover plate; 21. Cover plate body; 22. Cover plate side plate; 23. Guide groove; 24. Observation hole; 25. Micro switch operating hole; 26. Cover plate extension plate; 27. Second locking hole; 28. Trigger block mounting hole; 3. Mounting bracket; 31. Bolt mounting hole; 32. Guide bolt; 4. Trigger block; 41. Guide slope; 42. Holding surface; 5. Micro switch; 51. Micro contact. Detailed Implementation

[0019] The features and performance of the present invention will be further described in detail below with reference to embodiments.

[0020] In this invention, an additional base and cover are installed on the switch cabinet to facilitate the shielding of the switch cabinet. When grounding operation is required on the switch cabinet, the cover can be opened to trigger the inductive switch. The inductive switch can send information to the back-end to enhance the information interaction between the back-end and the field.

[0021] In Embodiment 1 of the switchgear grounding switch operation alarm device (hereinafter referred to as the alarm device) of the present invention: like Figure 1 and Figure 2 As shown, in this embodiment, the alarm device includes a base 1 for installation on the cabinet of the switchgear. A cover plate 2 is guidedly disposed on the base 1 and can slide relative to the base 1. During its movement, the cover plate 2 has a covered position for obscuring the operating holes on the switchgear and an open position for exposing the operating holes. A sensor switch is also fixedly disposed on the base 1. The sensor switch transmits the position information of the cover plate 2 to the backend. The sensor switch is provided with a sensor contact, and the cover plate 2 is also provided with a trigger for pressing the sensor contact when in the open position. That is to say, in order to perform a grounding operation on the switchgear, the cover plate 2 must be opened. During the process of opening the cover plate 2, the sensor switch transmits this information to the backend for the backend to view.

[0022] Of course, in other embodiments, the inductive switch may not have a sensing contact and may instead be an infrared inductive switch. Normally, the cover 2 blocks the infrared inductive switch; when the cover 2 is in the open position, it no longer blocks the switch, thus enabling position recognition of the cover 2. Alternatively, in other embodiments, the cover 2 and the base 1 may not have a guide fit; instead, the cover 2 may be hinged to the base 1. Alternatively, in other embodiments, the cover 2 may not have an additional trigger; instead, the cover 2 itself may press against the sensing contact to trigger the inductive switch. Alternatively, in other embodiments, the trigger and the sensing contact may not have to press against each other; instead, they may rely on sensing.

[0023] Specifically, such as Figure 5 As shown, the base 1 includes a fixing plate 11 that adheres to the cabinet of the switchgear and a mounting plate 12 connected to the fixing plate 11 and for mounting inductive contacts away from the switchgear. A locking plate 14 is also provided on the base 1 on the side of the fixing plate 11 away from the mounting plate 12. The fixing plate 11 is a flat plate with mounting holes for mounting onto the cabinet. An exposed hole 13 is also provided in the middle of the fixing plate 11, exposing the grounding operation hole of the switchgear, allowing operation of the switchgear's grounding switch. The mounting plate 12 is generally L-shaped, with one side of the mounting plate 12 perpendicular to the fixing plate 11 forming a first segment, and the other side parallel to the fixing plate 11 forming a second segment. Flanged flanges 121 are provided on the upper and lower sides of the second segment, which abut against the cover plate 2 to support it. Figure 2 and Figure 4 As shown, the inductive switch is a micro switch 5, which has a micro contact 51. The micro switch 5 is fixedly mounted on the second plate segment, which has two micro switch mounting holes 18. The micro switch 5 is mounted on the side of the mounting plate 12 facing the fixed plate 11.

[0024] Of course, in other embodiments, the first and second plate segments may be omitted, in which case the mounting plate 12 is arranged at an angle. Alternatively, in other embodiments, the upper and lower sides of the second plate segment may not have flanges 121, and the edges are used to contact the cover plate 2 to support it. Alternatively, in other embodiments, the base 1 may not have the mounting plate 12 and the fixing plate 11, but only the fixing plate 11, in which case a bracket is provided on the fixing plate 11, and the cover plate 2 is guided and positioned on the bracket of the fixing plate 11. Alternatively, in other embodiments, the exposed hole 13 may not be provided on the fixing plate 11, in which case the fixing plate 11 itself is smaller and is located on one side of the grounding operation hole.

[0025] like Figure 3 and Figure 7As shown, to facilitate the guiding fit between the base 1 and the cover plate 2, a mounting bracket 3 is also provided on the base 1. Specifically, a bracket mounting hole 17 is provided on the first plate segment. The mounting bracket 3 is L-shaped, with one side fitting against the first plate segment to form a first bracket plate, and the other side parallel to the second plate segment to form a second bracket plate. The mounting bracket 3 is mounted on the mounting plate 12 through the bracket mounting hole 17. A bolt mounting hole 31 is also provided on the mounting bracket 3, and a guide bolt 32 is fixedly installed in the bolt mounting hole 31. The guide bolt 32 extends away from the mounting plate 12, thereby facilitating the guiding fit with the cover plate 2. The guide bolt 32 is indirectly connected to the mounting plate 12. The mounting bracket 3 and the micro switch 5 are respectively arranged on both sides of the mounting plate 12 to facilitate avoidance. At this time, the screw of the guide bolt 32 also constitutes a guide post. At this time, the mounting plate 12 can limit the screwing position of the guide bolt 32. Of course, in other embodiments, if the mounting bracket 3 and the micro switch 5 do not overlap spatially, they can be arranged on the same side of the mounting plate 12. Alternatively, in other embodiments, a protruding post is welded onto the mounting bracket 3, serving as a guide post for mating with the cover plate 2. Alternatively, in other embodiments, the mounting bracket 3 is not provided; instead, the cover plate 2 and the base 1 are guided and mated by the mounting plate 12. Alternatively, in other embodiments, the second bracket plate is arranged in close contact with the mounting plate 12.

[0026] like Figure 6 As shown, the cover plate 2 is generally cubical. The cover plate 2 includes a cover plate body 21 arranged parallel to the fixing plate 11 and used to cover the operating hole. A flange bending towards the fixing plate 11 is provided on the cover plate body 21, with the flange located above the cover plate body 21 forming a cover plate side plate 22. A guide groove 23 is provided on the cover plate body 21 to cooperate with a guide stud. The bolt head of the guide stud is located just outside the cover plate body 21, thus stopping the cover plate body 21 and preventing it from detaching from the base 1. An observation hole 24 is also provided below the guide groove 23 on the cover plate body 21, facilitating the observation of the status of the grounding switch of the switchgear. A microswitch operating hole 25 is also provided on the cover plate body 21 for tools to be inserted for the installation of the microswitch 5. A cover plate extension plate 26 extending away from the fixing plate 11 is also provided on the side of the cover plate 2. A second locking hole 27 is provided on the cover plate extension plate 26. In this embodiment, the flange 121 above the mounting plate 12 is located below the upper cover plate side plate 22 to support the cover plate 2, at which point the cover plate 2 surrounds the mounting plate 12. Of course, in other embodiments, the mounting plate 12 can also surround the cover plate 2, in which case the flange 121 below the mounting plate 12 is located below the lower cover plate side plate 22 to support the cover plate 2. A locking plate 14 is also provided on the base 1. When the cover plate 2 is in the covered position, the cover plate extension plate 26 of the cover plate 2 fits into the locking plate 14. A first locking hole 15 is also provided on the locking plate 14. The first locking hole 15 and the second locking hole 27 fit together to facilitate the insertion of a lock body to lock the cover plate 2 and the base 1. At the same time, in order to facilitate the installation of the mounting bracket 3, a bracket operation hole 16 is also provided on the locking plate 14 of the base 1. Tools are inserted through the bracket operation hole 16 to install the bracket. Meanwhile, the locking plate 14 and the mounting plate 12 are respectively arranged on both sides of the fixing plate 11, so as to make more efficient use of space.

[0027] Of course, in other embodiments, when the cover plate 2 only guides the mounting plate 12, the guide groove 23 may not be provided on the cover plate 2. Alternatively, in other embodiments, the observation hole 24 may not be provided, and the size of the guide groove 23 may be increased to allow observation. Alternatively, in other embodiments, the second locking hole 27 and the first locking hole 15 may not be provided, and magnetic elements may be provided on the locking plate 14 and the cover plate extension plate 26, so that the cover plate 2 and the base 1 can be magnetically attracted together when no operation is required.

[0028] To facilitate the triggering of the micro switch 5, a triggering element for pressing the micro switch 5 is fixedly installed on the cover plate 2. Specifically, the triggering element is a trigger block 4, which is generally a right-angled trapezoid. A trigger block mounting hole 28 is provided on the side plate 22 of the cover plate, through which the trigger block 4 is fixedly installed on the cover plate 2. The surface of the trigger block 4 at the inclined waist of the trapezoid forms a guiding inclined surface 41 for switching the sensing contact from the released state to the pressed state. The surface of the trigger block 4 at the upper base of the trapezoid forms a holding surface 42 for holding the triggering element in the pressed state, thus facilitating continuous pressing of the micro switch 5. It is worth noting that the trigger block 4 is located on the same side of the mounting plate 12 as the micro switch 5. In this case, the trigger block 4 can also cooperate with the stop of the mounting plate 12 to prevent the cover plate 2 from falling off. Of course, in other embodiments, the trigger block 4 can also be set in the form of a triangle in cross-section. In this case, the trigger block 4 can only trigger the micro switch 5 and can no longer be held in a fixed position. Alternatively, in other embodiments, the trigger element may be omitted, and a protrusion may be fixedly provided on the cover plate 2 to press the micro switch 5.

[0029] When grounding operations are required on the switchgear, cover plate 2 must first be opened. As cover plate 2 moves from the covered position to the open position, the guide slope 41 of trigger block 4 presses the micro-contact 51 of micro switch 5. As cover plate 2 continues to move, the holding surface 42 of trigger block 4 presses the micro-contact 51, continuously activating it. The backend continuously receives this signal. After micro-contact 51 is activated, micro switch 5 generates an electrical signal and transmits it to the backend. The backend then receives information about the switchgear to be operated and checks whether it is de-energized. If the circuit breaker is in the open state, it sends a feedback to the field indicating that operation can continue; if the circuit breaker is in the closed state, it sends a feedback to the field indicating that operation cannot continue. The backend operation can be performed manually or using a controller with pre-set logic.

[0030] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. The scope of patent protection of the present invention shall be determined by the claims. Similarly, any equivalent structural changes made based on the description and drawings of the present invention shall also be included within the scope of protection of the present invention.

Claims

1. A grounding switch operation alarm device for switchgear, characterized in that: It includes a base for installation on the cabinet of the switchgear, a movable cover plate installed on the base, the cover plate having a covered position for blocking the grounding operation hole on the switchgear and an open position for exposing the grounding operation hole on the switchgear during its travel relative to the base, and an inductive switch is provided between the cover plate and the base for detecting the position of the cover plate and transmitting the position information to the back-end.

2. The alarm device for grounding switch operation of switchgear according to claim 1, characterized in that: The base includes a fixing plate for attaching to the cabinet of the switch cabinet and an L-shaped mounting plate connected to the fixing plate. The inductive switch is mounted on the mounting plate. The mounting plate includes a first plate segment arranged perpendicular to the fixing plate and a second plate segment arranged perpendicular to the first plate segment. The second plate segment is provided with a guide structure for cooperating with the cover plate guide.

3. The switchgear grounding switch operation alarm device according to claim 2, characterized in that: The second plate segment has flanges on its upper and lower sides, and the cover plate has cover plate side plates on its upper and lower sides. The flange on the upper side of the second plate segment is located below the upper cover plate side plate to support the cover plate, or the flange on the lower side of the second plate segment is located below the lower cover plate side plate to support the cover plate.

4. The switchgear grounding switch operation alarm device according to claim 2 or 3, characterized in that: The guiding structure includes a guide post fixedly disposed relative to the mounting plate, and the cover plate is provided with a guide groove for the guide post to pass through and cooperate with the guide post for guidance.

5. The switchgear grounding switch operation alarm device according to claim 4, characterized in that: The inductive switch is located on the side of the second plate segment facing the fixed plate, and the guide post is located on the side of the second plate segment facing away from the fixed plate.

6. The alarm device for grounding switch operation of switchgear according to claim 5, characterized in that: A mounting bracket is fixedly installed on the first plate segment. The mounting bracket is L-shaped and has a first bracket plate that fits against the first plate segment and a second bracket plate that fits against or is arranged parallel to the second plate segment. The guide post is disposed on the second bracket plate.

7. The switchgear grounding switch operation alarm device according to claim 6, characterized in that: The second support plate is provided with threaded holes, and bolts are fitted into the threaded holes. The bolt shank forms the guide post.

8. The switchgear grounding switch operation alarm device according to any one of claims 1-3, characterized in that: The inductive switch is fixedly mounted on the base. The inductive switch is provided with an inductive contact. The cover plate is provided with a trigger element for pressing the inductive contact when it is in the open position. The trigger element has a trapezoidal cross section. The surface of the trigger element where the inclined waist of the trapezoid is located forms a guide inclined surface for switching the inductive contact from the released state to the pressed state. The surface of the trigger element where one of the base edges of the trapezoid is located forms a holding surface for holding the trigger element in the pressed state.

9. The switchgear grounding switch operation alarm device according to any one of claims 1-3, characterized in that: The base is provided with a first locking hole for assembling the lock body, and the cover plate is provided with a second locking hole for assembling the lock body. When the cover plate is in the covered position, the first locking hole and the second locking hole are arranged in close contact.

10. The switchgear grounding switch operation alarm device according to claim 2 or 3, characterized in that: The fixing plate has an exposure hole in the middle for the grounding operation hole of the switch cabinet to be exposed. A locking plate is provided on the side of the base away from the mounting plate. The locking plate has a first locking hole for assembling the lock body. The cover plate has a second locking hole for assembling the lock body. When the cover plate is in the covered position, the first locking hole and the second locking hole are arranged in close contact.

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