Anti-misoperation valve baffle mechanism of high-voltage switch cabinet

Abstract

The utility model relates to the technical field of electric power systems, in particular to an anti-misoperation high-voltage switch cabinet valve baffle plate mechanism, which comprises a baffle plate, a lifting mechanism, a first travel switch, a second travel switch, a controller, a first contact and a second contact, the two baffle plates are respectively used for shielding the bus chamber contact box and the cable chamber contact box; the lifting mechanism is arranged on the side wall of the switch cabinet, and the lifting end of the lifting mechanism is connected with the baffle; the first travel switch and the second travel switch are respectively arranged on the switch cabinet; the first travel switch, the second travel switch and the two lifting mechanisms are all electrically connected with the controller. The first contact and the second contact are respectively used for triggering the first travel switch and the second travel switch, the first contact is arranged on the line side grounding trolley, and the second contact is arranged on the bus side grounding trolley. The utility model has the advantages that the first travel switch or the second travel switch is triggered by different grounding trolleys to open the corresponding baffle plate, so that the baffle plate is prevented from being opened by mistake.

Description

Technical Field

[0001] This utility model relates to the field of power system technology, and in particular to a high-voltage switchgear door baffle mechanism to prevent misoperation. Background Technology

[0002] The main function of switchgear is to open, close, control, and protect electrical equipment during power generation, transmission, distribution, and energy conversion in a power system. Switchgear is divided into four areas: instrument room, trolley switch room, busbar room, and cable room. The busbar room and cable room contain contact boxes. The switchgear's valves are divided into busbar-side valves and line-side valves (hereinafter referred to as upper and lower valves), used to open or close the contact boxes in the busbar and cable rooms, respectively. When the trolley or grounding trolley is pushed in, the operating lever opens the upper and lower valves to expose the contact boxes; conversely, pushing them out closes the valves.

[0003] The grounding trolley is divided into a line-side grounding trolley and a busbar-side grounding trolley. When the downstream load of the switchgear is under maintenance, the line-side grounding trolley needs to be pushed in; when the busbar is under maintenance, the busbar-side grounding trolley needs to be pushed in. In the existing valve baffle mechanism, the upper and lower valve baffles use the same mechanical opening and closing mechanism. Regardless of which type of grounding trolley is pushed in, both the upper and lower valve baffles will open. If the operator selects the wrong type of grounding trolley, the busbar will be energized and grounded, causing a major safety accident. Utility Model Content

[0004] The purpose of this utility model is to overcome the shortcomings of the prior art and provide a high-voltage switchgear door baffle mechanism to prevent misoperation.

[0005] The objective of this utility model is achieved through the following technical solution: a high-voltage switchgear door baffle mechanism to prevent misoperation, comprising:

[0006] The two baffles are used to shield the busbar compartment contact box and the cable compartment contact box, respectively.

[0007] A lifting mechanism is provided on the side wall of the switch cabinet. Each of the two baffles is provided with a corresponding lifting mechanism, and the lifting end of the lifting mechanism is connected to the baffle.

[0008] The first limit switch and the second limit switch are respectively installed on the switch cabinet;

[0009] The controller, the first limit switch, the second limit switch, and the two lifting mechanisms are all electrically connected to the controller.

[0010] The first contact and the second contact are used to trigger the first limit switch and the second limit switch, respectively. The first contact is set on the line-side grounding trolley, and the second contact is set on the bus-side grounding trolley.

[0011] This invention utilizes a first limit switch and a second limit switch. A first contact corresponding to the first limit switch is installed on the line-side grounding trolley, and a second contact corresponding to the second limit switch is installed on the bus-side grounding trolley. When the line-side grounding trolley is pushed into the switchgear, the first limit switch is triggered. In the absence of voltage on the line, the controller can control the lifting mechanism to open the lower baffle. When the bus-side grounding trolley is pushed into the switchgear, the second limit switch is triggered. In the absence of voltage on the bus, the controller can then control the lifting mechanism to open the upper baffle. By using different grounding trolleys to open corresponding baffles, the invention avoids opening the wrong baffle and causing safety accidents.

[0012] In some embodiments, the lifting mechanism includes a telescopic rod, which is vertically fixed to the side wall of the switch cabinet, and the telescopic end of the telescopic rod is connected to the baffle. The lifting and lowering of the baffle is controlled by the telescopic rod.

[0013] In some embodiments, the telescopic pole includes an electrically operated telescopic pole. An electrically operated telescopic pole is easily controlled by a controller.

[0014] In some embodiments, the lifting mechanism further includes a guide structure disposed on the side wall of the switch cabinet, and the baffle is slidably connected to the guide structure. The guide structure makes the baffle more stable during lifting.

[0015] In some embodiments, the guide structure includes a guide rod and a guide rod mounting base. The guide rod mounting base is fixedly mounted on the side wall of the switchgear. The guide rod is vertically oriented, with one end fixedly connected to the guide rod mounting base. The guide rod passes through the baffle, allowing the baffle to slide slidably with the guide rod. The vertical guide rod enables the baffle to slide vertically.

[0016] In some embodiments, the baffle is elongated, with a lifting mechanism at each end. The elongated baffle facilitates blocking all busbar compartment contact boxes or cable compartment contact boxes, and the presence of two lifting mechanisms corresponding to each baffle makes the lifting and lowering of the baffle more stable.

[0017] In some embodiments, the first limit switch is disposed on the right side wall of the switchgear, and the second limit switch is disposed on the left side wall of the switchgear. By disposing of the first and second limit switches on different sides of the switchgear, the first and second contacts are correspondingly disposed on different sides of the line-side grounding trolley and the bus-side grounding trolley, respectively, to avoid accidental triggering.

[0018] This utility model has the following advantages:

[0019] This invention employs a lifting mechanism connected to a baffle, along with a first and second limit switches. When the line-side grounding trolley is pushed into the switchgear, the first contact on the trolley triggers the first limit switch. When there is no voltage on the line side, the controller controls the lifting mechanism corresponding to the lower baffle to move the lower baffle away, connecting the line-side grounding trolley to the cable compartment contact box. When the busbar-side grounding trolley is pushed into the switchgear, the second contact on the busbar-side grounding trolley triggers the second limit switch. When there is no voltage on the busbar side, the controller controls the lifting mechanism corresponding to the upper baffle to move the upper baffle away, exposing the busbar compartment contact box, connecting the busbar-side grounding trolley to the busbar compartment contact box. By having different grounding trolleys corresponding to different baffles, incorrect baffle opening is avoided, thus preventing safety accidents. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the high-voltage switchgear door baffle for preventing misoperation according to this utility model;

[0021] In the diagram: 1. Baffle; 2. Lifting mechanism; 21. Telescopic rod; 22. Guide structure; 221. Mounting base; 222. Guide rod; 31. First limit switch; 32. Second limit switch; 4. Busbar compartment contact box; 5. Cable compartment contact box. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the present utility model and are not intended to limit the present utility model; that is, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The components of the embodiments of the present utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0023] The present invention will be further described below with reference to the accompanying drawings, but the scope of protection of the present invention is not limited to the following description.

[0024] like Figure 1 As shown, a high-voltage switchgear door baffle mechanism for preventing misoperation includes:

[0025] Baffle 1, the two baffles 1 are respectively used to shield the busbar compartment contact box 4 and the cable compartment contact box 5;

[0026] Lifting mechanism 2 is installed on the side wall of the switch cabinet. Each of the two baffles 1 is provided with a lifting mechanism 2. The lifting end of the lifting mechanism 2 is connected to the baffle 1.

[0027] The first limit switch 31 and the second limit switch 32 are respectively installed on the switch cabinet;

[0028] The controller, the first limit switch 31, the second limit switch 32 and the two lifting mechanisms 2 are all electrically connected to the controller.

[0029] The first contact and the second contact (not shown in the attached figure) are used to trigger the first limit switch 31 and the second limit switch 32, respectively. The first contact is set on the line-side grounding trolley, and the second contact is set on the bus-side grounding trolley.

[0030] Specifically, in this embodiment, two baffles 1 are arranged one above the other, respectively shielding the contact box 4 in the busbar compartment and the contact box 5 in the cable compartment. Each baffle 1 is equipped with a corresponding lifting mechanism 2, which is fixedly mounted on the side wall of the switchgear. The lifting end of the lifting mechanism 2 is connected to the baffle 1. In this embodiment, a first contact is provided on the line-side grounding trolley, and a second contact is provided on the busbar-side grounding trolley. The circuit breaker simultaneously has both a first contact and a second contact. In this embodiment, the controller can be a PLC, an industrial computer, or a microcontroller, etc.

[0031] In this embodiment, during use, when the line-side grounding trolley is pushed into the switchgear, the first contact triggers the first limit switch 31, which sends an electrical signal to the controller. At this time, the controller uses the bus PT and line PT to detect the bus voltage and line voltage in the switchgear in real time. If the controller detects no voltage on the line, it controls the lifting mechanism 2 corresponding to the baffle 1 of the cable compartment contact to rise and fall, moving the baffle 1 to expose the cable compartment contact box 5, facilitating the connection of the line-side grounding trolley to the cable compartment contact box 5. When the bus-side grounding trolley is pushed into the switchgear, the second contact triggers the second limit switch 32, which... Limit switch 32 sends an electrical signal to the controller. At this time, if the controller detects no voltage on the busbar, it controls the lifting mechanism 2 corresponding to the baffle 1 of the busbar compartment contact box 4 to rise and fall, driving the baffle 1 to move and expose the busbar compartment contact box 4 so that the busbar side grounding trolley can connect to the busbar compartment contact box 4. When the circuit breaker is pushed into the switch cabinet, the first limit switch 31 and the second limit switch 32 are triggered simultaneously by the first and second contacts on the circuit breaker. The controller controls the lifting mechanism 2 corresponding to the upper baffle 1 and the lower baffle 1 to rise and fall simultaneously, so that both the cable compartment contact box 5 and the busbar compartment contact box 4 are exposed so that the circuit breaker can be connected.

[0032] By pushing in different grounding trolleys, the corresponding baffle 1 is opened, avoiding the incorrect opening of baffle 1 and improving the safety of maintenance work.

[0033] Preferably, the lifting mechanism 2 includes a telescopic rod 21, which is vertically fixed on the side wall of the switch cabinet, and the telescopic end of the telescopic rod 21 is connected to the baffle 1. The telescopic rod 21 is electrically connected to the controller, facilitating the controller's control of the telescopic rod 21.

[0034] Preferably, the telescopic rod 21 includes an electric telescopic rod 21, which does not require hydraulic or pneumatic drive, has a simple structure, and is easy to apply in switch cabinets.

[0035] Preferably, the lifting mechanism 2 further includes a guide structure 22, which is disposed on the side wall of the switch cabinet, and the baffle 1 is slidably connected to the guide structure 22. The guide structure 22 improves the stability of the baffle 1 during lifting.

[0036] Preferably, the guide structure 22 includes a guide rod 222 and a guide rod 222 mounting base 221. The guide rod 222 mounting base 221 is fixedly mounted on the side wall of the switchgear. The guide rod 222 is vertically oriented, with one end fixedly connected to the guide rod 222 mounting base 221. The guide rod 222 passes through the baffle 1, allowing the baffle 1 to slide slidably with the guide rod 222. The guide rod 222 allows the baffle 1 to slide up and down.

[0037] Preferably, the baffle 1 is elongated, and a lifting mechanism 2 is provided at each end of the baffle 1.

[0038] Specifically, in this embodiment, the baffle 1 is elongated, which facilitates blocking all busbar compartment contact boxes 4 and all cable compartment contact boxes 5. Each baffle 1 has a lifting mechanism 2 at both ends, which moves the baffle 1 up and down to improve the stability of the movement.

[0039] Preferably, the first limit switch 31 is disposed on the right side wall of the switch cabinet, and the second limit switch 32 is disposed on the left side wall of the switch cabinet. With the first limit switch 31 and the second limit switch 32 respectively disposed on both sides of the switch cabinet, correspondingly, the first contact is disposed on the right side of the line-side grounding trolley, and the second contact is disposed on the left side of the bus-side grounding trolley.

[0040] The above description is merely a preferred embodiment of this utility model and does not constitute any limitation on this utility model. Any person skilled in the art can make many possible variations and modifications to the technical solution of this utility model, or modify it into equivalent embodiments, without departing from the scope of the technical solution of this utility model. Therefore, any modifications, equivalent changes, and alterations made to the above embodiments based on the technology of this utility model without departing from the scope of the technical solution of this utility model shall fall within the protection scope of this technical solution.

Claims

1. A high-voltage switchgear door baffle mechanism to prevent misoperation, characterized in that, include: Baffles (1), the two baffles (1) are used to shield the busbar compartment contact box (4) and the cable compartment contact box (5) respectively; Lifting mechanism (2) is provided on the side wall of the switch cabinet. Both baffles (1) are provided with lifting mechanisms (2). The lifting end of the lifting mechanism (2) is connected to the baffle (1). The first limit switch (31) and the second limit switch (32) are respectively installed on the switch cabinet; The controller, the first limit switch (31), the second limit switch (32) and the two lifting mechanisms (2) are all electrically connected to the controller; The first contact and the second contact are used to trigger the first limit switch (31) and the second limit switch (32) respectively. The first contact is set on the line-side grounding trolley, and the second contact is set on the bus-side grounding trolley.

2. The high-voltage switchgear door baffle mechanism for preventing misoperation according to claim 1, characterized in that, The lifting mechanism (2) includes a telescopic rod (21), which is vertically fixed on the side wall of the switch cabinet. The telescopic end of the telescopic rod (21) is connected to the baffle (1).

3. The high-voltage switchgear door baffle mechanism for preventing misoperation according to claim 2, characterized in that, The telescopic pole (21) includes an electrically operated telescopic pole (21).

4. The high-voltage switchgear door baffle mechanism for preventing misoperation according to claim 2, characterized in that, The lifting mechanism (2) also includes a guide structure (22), which is installed on the side wall of the switch cabinet, and the baffle (1) is slidably connected to the guide structure (22).

5. A high-voltage switchgear door baffle mechanism for preventing misoperation according to claim 4, characterized in that, The guide structure (22) includes a guide rod (222) and a guide rod (222) mounting base (221). The guide rod (222) mounting base (221) is fixedly installed on the side wall of the switch cabinet. The guide rod (222) is vertically arranged. One end of the guide rod (222) is fixedly connected to the guide rod (222) mounting base (221). The guide rod (222) passes through the baffle (1) so that the baffle (1) and the guide rod (222) are slidably connected.

6. The high-voltage switchgear door baffle mechanism for preventing misoperation according to claim 1, characterized in that, The baffle (1) is elongated, and a lifting mechanism (2) is provided at each end of the baffle (1).

7. The high-voltage switchgear door baffle mechanism for preventing misoperation according to claim 1, characterized in that, The first limit switch (31) is located on the right side wall of the switch cabinet, and the second limit switch (32) is located on the left side wall of the switch cabinet.

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