Control cabinet capable of preventing hot-line operation

Abstract

The utility model discloses an anti-hot-line operation control cabinet, and particularly relates to the field of electrical control, the anti-hot-line operation control cabinet comprises an electrical cabinet body, the electrical cabinet body is internally provided with a distance measuring sensor, a signal conversion module, a voltage collector, a PLC controller, an execution relay and an electromagnet; the output end of the distance measuring sensor is connected with the input end of the signal conversion module, the output end of the signal conversion module is connected with the input end of the PLC, the output end of the PLC is connected with the input end of the execution relay, the output end of the voltage collector is connected with the input end of the PLC, and the output end of the execution relay is connected with the input end of the electromagnet. According to the utility model, the distance measuring sensor is used for detecting the opening of the cabinet door, the signal is transmitted to the PLC through the signal conversion module, the voltage collector is used for collecting the voltage of the power supply input end, and the PLC sends an execution command for cutting off the power supply to the execution relay according to the feedback information, so that the cabinet door can be prevented from being opened by misoperation or violation operation. And electric shock accidents caused by electrification of an internal circuit are avoided.

Description

Technical Field

[0001] This utility model relates to the field of electrical control technology, and more specifically, to a control cabinet that is protected against live operation. Background Technology

[0002] An electrical cabinet is a cabinet used to protect electronic components and protect them from the outside world, preventing electric shock hazards. Electrical cabinets have a wide range of applications, mainly in the chemical industry, environmental protection industry, power system, metallurgical system, industrial, nuclear power industry, fire safety monitoring, transportation industry, etc.

[0003] The utility model patent with patent application publication number CN208316055U discloses an electrical cabinet with an electrical control protective cover. The electrical cabinet door is provided with an electrical control switch operation position. The electrical control switch operation position includes a protective cover and an operation channel that extends into the cabinet. One end of the operation channel is located at the cabinet door and is provided with a protective cover at this end. The other end is adjacent to the electrical control switch inside the electrical cabinet so that the electrical control switch can be turned on and off through the operation channel.

[0004] Although the aforementioned patent allows for safe operation of the main electrical switch inside the cabinet without opening the cabinet door, there is still a risk that if the cabinet door is opened due to misoperation or improper operation, the internal circuitry of the electrical cabinet may become energized, potentially leading to electric shock. Utility Model Content

[0005] In order to overcome the above-mentioned defects of the prior art, this utility model provides a control cabinet that is protected against live operation. By improving the structural design of the existing electrical cabinet, it avoids safety accidents caused by opening the electrical cabinet while it is energized.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a control cabinet for protection against live operation, comprising an electrical cabinet body, wherein the electrical cabinet body is provided with a distance measuring sensor, a signal conversion module, a voltage acquisition device, a PLC controller, an execution relay and an electromagnet;

[0007] The output terminal of the ranging sensor is connected to the input terminal of the signal conversion module, the output terminal of the signal conversion module is connected to the input terminal of the PLC controller, the output terminal of the PLC controller is connected to the input terminal of the execution relay, the output terminal of the voltage acquisition unit is connected to the input terminal of the PLC controller, and the output terminal of the execution relay is connected to the input terminal of the electromagnet.

[0008] The voltage acquisition device is connected to the power input terminal of the electrical cabinet body.

[0009] Furthermore, the PLC controller controls the relay to cut off the power supply by detecting the input power supply and the opening and closing status of the cabinet door of the electrical cabinet body.

[0010] Furthermore, the electrical cabinet body includes an electrical cabinet body and an electrical cabinet door, and one side of the electrical cabinet door is rotatably connected to the electrical cabinet body via a hinge;

[0011] The electrical cabinet door is equipped with a mechanical lock between the side away from the hinge and the cabinet body. This allows maintenance personnel to open the cabinet door with a key during routine maintenance, while locking the door with the mechanical lock during non-maintenance periods to ensure safety during daily use.

[0012] Furthermore, the bottom of the electrical cabinet is evenly provided with multiple wiring plugs, and a through hole is opened at the connection between the electrical cabinet and the wiring plug, and the wiring plug is engaged with the through hole;

[0013] The wiring plug is made of rubber material. The power cord is connected to the circuit inside the electrical cabinet through the wiring plug, which effectively avoids wear or scratches caused by direct contact between the power cord and the electrical cabinet body. The connection point is sealed by the wiring plug.

[0014] Furthermore, an electrical component mounting plate is fixedly installed inside the electrical cabinet, and an mounting plate is fixedly installed on the back side of the electrical cabinet. The electrical cabinet body is fixedly installed on the wall / ground of the assembly location via the mounting plate and bolts, and necessary electrical components such as electricity meters, terminals, and circuit breakers are assembled on the electrical component mounting plate.

[0015] A manual control button is fixedly installed on the side wall of the electrical cabinet, and the input terminal of the manual control button is connected to the input terminal of the PLC controller.

[0016] Furthermore, an upper baffle is fixedly provided on the top front side of the inner cavity of the electrical cabinet, an electromagnet is fixedly provided on the bottom side wall of the upper baffle, a lower baffle is provided at the bottom of the upper baffle, and a connecting iron block is fixedly provided on the top side wall of the lower baffle.

[0017] Both the upper and lower baffles are made of transparent PVC or acrylic sheets.

[0018] Furthermore, an adjustment groove is provided at the connection between the bottom of the electrical cabinet and the lower baffle, and a sealing strip is fixedly provided at the bottom of the lower baffle. The sealing strip is made of rubber.

[0019] Furthermore, the electrical cabinet has an adjusting groove on its inner wall, and the lower baffle slides up and down along the adjusting groove.

[0020] The technical effects and advantages of this utility model are as follows:

[0021] This invention uses a distance sensor to detect when the cabinet door is open, transmits the signal to the PLC controller via a signal conversion module, and uses a voltage acquisition unit to acquire the voltage at the power input terminal. Based on the feedback information, the PLC controller issues an execution command to the execution relay to cut off the power supply, which can prevent electric shock accidents caused by the internal circuit being energized when the cabinet door is opened due to misoperation or improper operation.

[0022] This utility model uses a transparent panel composed of an upper baffle and a lower baffle. In the event of a detection error or malfunction in the electronic components, if the cabinet door is opened without power being cut off due to a detection error, the power can be manually cut off via a manual control button. At this time, the electromagnet loses its attraction to the connecting iron block. Maintenance personnel can then pull down the lower baffle to expose the electrical components inside the cabinet, making it easier for maintenance personnel to perform maintenance and repairs. This adds a manual adjustment mode to the pure automation, further preventing electric shock accidents caused by the internal circuit being energized when the cabinet door is opened due to misoperation or improper operation. Attached Figure Description

[0023] To more clearly illustrate the embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0024] The structures, proportions, sizes, etc. illustrated in this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the implementation conditions of this utility model. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that this utility model can produce, should still fall within the scope of the technical content disclosed in this utility model.

[0025] Figure 1 This is a schematic diagram of the cabinet door closed state module of this utility model.

[0026] Figure 2 This is a schematic diagram of the cabinet door opening state module of this utility model.

[0027] Figure 3 This is a schematic diagram of the overall structure of this utility model.

[0028] Figure 4 This is a schematic diagram of the opening structure of the electrical cabinet door of the electrical cabinet body of this utility model.

[0029] Figure 5 This is a schematic diagram of the lower baffle in the pulled-down state of this utility model.

[0030] The attached diagram is labeled as follows: 1. Distance sensor, 2. Electrical cabinet body, 3. Signal conversion module, 4. Voltage acquisition unit, 5. PLC controller, 6. Actuation relay, 7. Electromagnet;

[0031] 21 Electrical cabinet body, 22 Electrical cabinet door, 23 Manual control button, 24 Wiring plug, 25 Mechanical lock, 26 Lower baffle, 27 Upper baffle, 28 Adjustable slide rail. Detailed Implementation

[0032] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. 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.

[0033] This utility model provides, for example Figure 1-2 The illustrated live-line protection control cabinet includes an electrical cabinet body 2. The electrical cabinet body 2 houses a ranging sensor 1, a signal conversion module 3, a voltage acquisition unit 4, a PLC controller 5, an execution relay 6, and an electromagnet 7. The output terminal of the ranging sensor 1 is connected to the input terminal of the signal conversion module 3, wherein the signal conversion module 3 is an XC-DW enhanced power distribution isolator, and the ranging sensor 1 is a GP2Y0A02YK0F infrared ranging sensor. The output terminal of the signal conversion module 3 is connected to the input terminal of the PLC controller 5. The LC controller model is set to FX3U-16MT / DSS. The output terminal of PLC controller 5 is connected to the input terminal of execution relay 6. The output terminal of voltage acquisition device 4 is connected to the input terminal of PLC controller 5. Voltage acquisition device 4 is set to YK-3D3 series power acquisition converter. The output terminal of execution relay 6 is connected to the input terminal of electromagnet 7. Voltage acquisition device 4 is connected to the power input terminal of electrical cabinet body 2. PLC controller 5 controls execution relay 6 to cut off the power supply by detecting the input power supply and the opening and closing status of the cabinet door of electrical cabinet body 2.

[0034] Specifically, when the electrical cabinet door 22 of the electrical cabinet body 2 is opened, the distance sensor 1 transmits the signal of the distance change detected by the door opening to the signal conversion module 3. The signal conversion module 3 converts the distance signal into an electrical signal and sends it to the PLC controller 5. The PLC controller 5 issues a command to the voltage acquisition device 4 to acquire the voltage at the power input terminal of the electrical cabinet body 2. The voltage acquisition device 4 feeds back the acquired information to the PLC controller 5. The PLC controller 5 issues an execution command to the execution relay 6 based on the feedback information. During the overall control process, the detected distance value of the electrical cabinet door 22 should be set to ensure that the opening degree of the electrical cabinet door 22 is not greater than 5mm to ensure accuracy during use. This method can prevent electric shock accidents caused by the internal circuit being energized when the cabinet door is opened due to misoperation or improper operation.

[0035] More specifically, refer to the appendix Figure 3-4 The electrical cabinet body 2 includes an electrical cabinet body 21 and an electrical cabinet door 22. One side of the electrical cabinet door 22 is rotatably connected to the electrical cabinet body 21 via a hinge. A mechanical lock 25 is provided between the electrical cabinet door 22 and the electrical cabinet body 21 on the side away from the hinge. This allows maintenance personnel to open the electrical cabinet door 22 with a key during routine maintenance, while locking the electrical cabinet door 22 with the mechanical lock 25 during non-maintenance periods to ensure daily use safety. The mechanical lock 25 serves as the daily opening and closing component of the electrical cabinet body 2.

[0036] Multiple wiring plugs 24 are evenly distributed at the bottom of the electrical cabinet body 21. Through holes are provided at the connection between the electrical cabinet body 21 and the wiring plugs 24, and the wiring plugs 24 are engaged with the through holes. The wiring plugs 24 are made of rubber material. The power cord is connected to the circuit inside the electrical cabinet body 2 through the wiring plugs 24, which effectively avoids wear or scratches caused by direct contact between the power cord and the electrical cabinet body 21. The connection is sealed by the wiring plugs 24. An electrical component mounting plate is fixedly installed inside the electrical cabinet body 21. An mounting plate is fixedly installed on the back side of the electrical cabinet body 21. The electrical cabinet body 2 is fixedly installed on the wall / ground of the assembly location by the mounting plate and bolts. The necessary electrical components such as meters, terminals, and circuit breakers are installed on the electrical component mounting plate.

[0037] A manual control button 23 is fixedly installed on the side wall of the electrical cabinet 21. The input terminal of the manual control button 23 is connected to the input terminal of the PLC controller 5. An upper baffle 27 is fixedly installed on the top front side of the inner cavity of the electrical cabinet 21. An electromagnet 7 is fixedly installed on the bottom side wall of the upper baffle 27. A lower baffle 26 is installed at the bottom of the upper baffle 27. A connecting iron block is fixedly installed at the top side wall of the lower baffle 26. Both the upper baffle 27 and the lower baffle 26 are made of transparent PVC or acrylic sheets. An adjustment groove is opened at the connection between the bottom of the electrical cabinet 21 and the lower baffle 26. A sealing strip is fixedly installed at the bottom of the lower baffle 26. The sealing strip is made of rubber. An adjustment slide groove 28 is provided on the inner wall of the electrical cabinet 21. The lower baffle 26 slides up and down along the adjustment slide groove 28.

[0038] The upper baffle 27 and the lower baffle 26 together form a transparent panel embedded in the electrical cabinet body 21, adding a "safety wall" before the electrical mounting plates inside the electrical cabinet can be opened through the cabinet door 22. This allows for observation of whether the electronic components inside the electrical cabinet body 2 are still operating (energized) in case of electronic component detection errors or malfunctions, after opening the cabinet door 22 via the mechanical lock 25. If a malfunction occurs and the power is not cut off, the electromagnet 7 will attract the connected iron block, preventing the lower baffle 26 from opening and preventing maintenance personnel from accessing the internal energized components. In such cases, manual control can be used to... The manual input of an electrical signal is controlled by button 23. After receiving the electrical signal, the PLC controller 5 controls the relay 6 to cut off the power. At this time, the electromagnet 7 loses its attraction to the connected iron block. The maintenance personnel can pull down the lower baffle 26 and slide it down along the adjusting slide 28 to make the electrical component mounting plate inside the electrical cabinet 21 connected to the external electrical components, which is convenient for maintenance personnel to perform maintenance and repair. The addition of a manual adjustment mode on the basis of pure automation further avoids electric shock accidents caused by the internal circuit being energized when the cabinet door is opened due to misoperation or violation of regulations.

[0039] Working principle of this utility model:

[0040] Fully automatic detection: When the distance sensor 1 detects that the electrical cabinet door 22 is open, the PLC controller 5 sends a command to the execution relay 6 to cut off the power supply. As long as the cabinet door is open, it ensures that there is no live operation.

[0041] Manual power off: If the detection element is damaged or misjudged, the power is cut off by manually controlling button 23. In addition, a baffle consisting of upper baffle 27 and lower baffle 26 is added. In the case of non-power off, even if the electrical cabinet door 22 is opened, the circuit will still be isolated from the outside of the cabinet.

[0042] Although the present invention has been described in detail above with general descriptions and specific embodiments, some modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, all such modifications or improvements made without departing from the spirit of the present invention fall within the scope of protection claimed by the present invention.

Claims

1. A control cabinet for protection against live operation, comprising an electrical cabinet body (2), characterized in that: The electrical cabinet body (2) is equipped with a distance sensor (1), a signal conversion module (3), a voltage acquisition device (4), a PLC controller (5), an execution relay (6), and an electromagnet (7). The output of the ranging sensor (1) is connected to the input of the signal conversion module (3), the output of the signal conversion module (3) is connected to the input of the PLC controller (5), the output of the PLC controller (5) is connected to the input of the execution relay (6), the output of the voltage acquisition device (4) is connected to the input of the PLC controller (5), and the output of the execution relay (6) is connected to the input of the electromagnet (7). The voltage acquisition device (4) is connected to the power input terminal of the electrical cabinet body (2).

2. The anti-live operation control cabinet according to claim 1, characterized in that: The PLC controller (5) controls the relay (6) to cut off the power supply by detecting the opening and closing status of the cabinet door of the electrical cabinet body (2) and the input power supply.

3. The anti-live operation control cabinet according to claim 1, characterized in that: The electrical cabinet body (2) includes an electrical cabinet body (21) and an electrical cabinet door (22). One side of the electrical cabinet door (22) is rotatably connected to the electrical cabinet body (21) via a hinge. A mechanical lock (25) is provided between the electrical cabinet door (22) away from the hinge and the electrical cabinet body (21).

4. The anti-live operation control cabinet according to claim 3, characterized in that: The bottom of the electrical cabinet (21) is evenly provided with a plurality of wiring plugs (24), and a through hole is provided at the connection between the electrical cabinet (21) and the wiring plugs (24), and the wiring plugs (24) are engaged with the through hole; The wiring plug (24) is made of rubber material, and the power cord is connected to the circuit inside the electrical cabinet body (2) via the wiring plug (24).

5. The anti-live operation control cabinet according to claim 3, characterized in that: An electrical component mounting plate is fixedly installed inside the electrical cabinet body (21), and an mounting plate is fixedly installed on the back side of the electrical cabinet body (21); The electrical cabinet (21) is fixedly provided with a manual control button (23) on the side wall, and the input end of the manual control button (23) is connected to the input end of the PLC controller (5).

6. The anti-live operation control cabinet according to claim 3, characterized in that: An upper baffle (27) is fixedly provided on the top front side of the inner cavity of the electrical cabinet (21). An electromagnet (7) is fixedly provided on the bottom side wall of the upper baffle (27). A lower baffle (26) is provided at the bottom of the upper baffle (27). A connecting iron block is fixedly provided on the top side wall of the lower baffle (26). Both the upper baffle (27) and the lower baffle (26) are made of transparent PVC or acrylic sheets.

7. The anti-live operation control cabinet according to claim 6, characterized in that: An adjustment groove is provided at the connection between the bottom end of the electrical cabinet body (21) and the lower baffle (26), and a sealing strip is fixedly provided at the bottom end of the lower baffle (26), the sealing strip being made of rubber.

8. The anti-live operation control cabinet according to claim 7, characterized in that: The electrical cabinet (21) has an adjustment groove (28) on its inner wall, and the lower baffle (26) slides up and down along the adjustment groove (28).

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