Distribution box grounding wire breakage alarm device

Abstract

The utility model discloses a distribution box grounding wire break alarm device, which comprises a grounding busbar arranged on the inner bottom wall of a distribution box and a plurality of connecting wires arranged on the grounding busbar, an induction assembly used for monitoring the connecting wires is arranged in the distribution box, and the induction assembly comprises a microprocessor. One side of the microprocessor is provided with a frame plate, the frame plate is provided with a plurality of straight-through current transformers which are respectively sleeved on the surfaces of the plurality of connecting wires, and the outer wall of the distribution box is provided with a buzzer which is connected with the microprocessor. Each connecting line is monitored in real time, and once any one or more connecting lines are broken, the microprocessor can control the buzzer to give an alarm, so that workers are effectively reminded, the workers are prevented from electric shock, and the inspection time is saved for subsequent overhaul of a large number of distribution boxes; an effective insulation protection effect is achieved through the hollow insulation square tubes, and meanwhile various lines can be arranged in the frame plate and are prevented from being exposed outside.

Description

Technical Field

[0001] The utility model belongs to the technical field of safe operation of factory equipment, and in particular relates to a ground wire disconnection alarm device for a distribution box. Background Art

[0002] The existing distribution boxes in production workshops mainly use three-phase AC power (380V), plus a neutral wire (N) and a ground wire (PE). When the insulation of cables and electrical components in the distribution box is damaged, leakage will occur, causing the metal shell of the box to be charged, which will cause workers to be electric shocked if they touch it. The ground wire in the distribution box can discharge the leakage of the metal shell of the box, thereby ensuring the safety of personnel. However, the distribution boxes in production workshops are frequently used and have been in service for a long time, which can easily cause the ground wire of the distribution box to break (including loosening and oxidation). Once the distribution box leaks, the leakage cannot be discharged through the ground wire, posing a safety hazard of electric shock to personnel. Because the broken ground wire of the distribution box is hidden and difficult to detect, it relies on staff to check each one one by one. There are many distribution boxes in the production workshop, and the inspection is time-consuming and labor-intensive. Summary of the Invention

[0003] The purpose of this utility model is to address the problems existing in the prior art and provide a distribution box ground wire break alarm device, which is used to monitor whether the ground wire is normal at all times. Once a break occurs, an alarm will be immediately issued, so as to discover the situation in time, effectively avoid electric shock to personnel, and save inspection time for subsequent maintenance.

[0004] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a distribution box ground wire break alarm device, comprising a grounding bus arranged on the bottom wall of the distribution box, and a plurality of connecting wires arranged on the grounding bus, an induction component for monitoring the connecting wires is provided inside the distribution box, the induction component includes a microprocessor, a frame plate is provided on one side of the microprocessor, and a plurality of through-type current transformers are respectively arranged on the surface of the plurality of connecting wires, and a buzzer connected to the microprocessor is provided on the outer wall of the distribution box.

[0005] Each connection line to the ground bus is monitored in real time through multiple through-type current transformers. Once any one or more of the connection lines does not have a small current flowing through it, it means that the connection line is disconnected from the ground bus. The through-type current transformer will transmit the signal to the microprocessor, and then the microprocessor will control the buzzer alarm, which can effectively remind the staff to prevent electric shock. At the same time, it also saves inspection time for subsequent maintenance of a large number of wiring boxes.

[0006] Optionally, the portion of the connecting wire that passes through the through-type current transformer and the portion that connects to the ground bus are both bare copper wires. This design allows the through-type current transformer to more sensitively monitor small currents.

[0007] Optionally, the frame plate is a hollow insulating square tube, and a plurality of placement openings vertically passing through the frame plate are opened on the frame plate. Power connection grooves are opened on the top of the frame plate and on both sides of the placement openings, and power connection copper sheets are provided in the power connection grooves.

[0008] The hollow insulating square tube provides effective insulation protection, and various lines can be placed inside the frame to avoid being exposed.

[0009] Optionally, the through-type current transformer is arranged in the placement opening, and power connection pins are provided on both sides of the through-type current transformer, which are placed in the power connection slot and in contact with the power connection copper sheet.

[0010] Optionally, the power pin is connected to a signal line that passes through the interior of the frame plate and is connected to the microprocessor, and the microprocessor is connected to the through-type current transformer via the signal line.

[0011] Optionally, a support frame connected to the bottom wall of the distribution box is provided at one end of the frame plate away from the microprocessor, so as to provide the frame plate with sufficient stability.

[0012] Optionally, a grounding copper wire passing through the distribution box is provided on the inner top wall of the grounding busbar, and a conductive rod inserted into the ground is provided at the other end of the grounding copper wire.

[0013] Optionally, the part of the grounding copper wire that contacts the distribution box is a bare copper wire, and the surface of the remaining part is covered with an insulating protective cover. The exposed part of the grounding copper wire contacts the distribution box, which can transfer the current of the distribution box to the ground to ensure personnel safety.

[0014] Compared with the prior art, the beneficial effects of the present invention are: 1. Each connecting wire connected to the grounding bus is monitored in real time through multiple through-type current transformers. Once any one or more connecting wires are broken, the microprocessor can control the buzzer to alarm, thereby effectively reminding the staff to prevent people from electric shock. At the same time, it also saves inspection time for subsequent maintenance of a large number of wiring boxes; 2. The hollow insulating square tube has an effective insulation protection effect, and various lines can be set inside the frame plate to avoid exposure of the lines; 3. The support frame makes the frame plate have sufficient stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a structural diagram of a ground wire disconnection alarm device for a distribution box according to the utility model;

[0016] Figure 2 This is an enlarged schematic diagram of the connection relationship between the ground wire component and the induction component of the utility model;

[0017] Figure 3 This is a schematic diagram of the frame plate of the utility model.

[0018] In the figure: 1. Distribution box; 2. Grounding bus; 3. Connecting wire; 4. Sensing component; 41. Microprocessor; 42. Frame plate; 421. Installation opening; 422. Power connection slot; 43. Support frame; 44. Through-type current transformer; 5. Buzzer. DETAILED DESCRIPTION

[0019] The following is a clear and complete description of the technical solution of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0020] In the description of the present invention, it should be noted that the terms "middle", "upper", "lower", "left", "right", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0021] like Figure 1 As shown, the specific scheme of the embodiment is as follows: A distribution box ground wire disconnection alarm device includes a ground bus 2 arranged on the bottom wall of the distribution box 1, and multiple connecting wires 3 arranged on the ground bus 2.

[0022] In this embodiment, the other ends of all the connecting wires 3 are respectively connected to other live components in the distribution box 1, and the number of connecting wires 3 is consistent with the number of live components that require grounding wires to ensure that each live component can conduct current into the ground in the event of a short circuit.

[0023] like Figure 1-2 As shown, the distribution box 1 is provided with a sensing component 4 for monitoring the connecting wires 3. The sensing component 4 includes a microprocessor 41. A frame plate 42 is provided on one side of the microprocessor 41. The frame plate 42 is provided with a plurality of through-type current transformers 44 respectively mounted on the surfaces of multiple connecting wires 3. A buzzer 5 connected to the microprocessor 41 is provided on the outer wall of the distribution box 1.

[0024] During normal operation of the device, a small current will flow through each connecting wire 3; this small current can be detected by the through-hole current transformer 44. If a small current flows through the connecting wire 3, it indicates that the connecting wire 3 and the connected components are not disconnected. If no small current flows through the connecting wire 3, it indicates that the connecting wire 3 and the connected components are disconnected.

[0025] In this embodiment, the through-type current transformer 44 is any one of the ZCCTB2111 micro current transformer or the LDC5-10 high-precision through-type current transformer. Each connecting line 3 connected to the grounding bus 2 is monitored in real time through multiple through-type current transformers 44. Once any one or more connecting lines 3 do not have a small current flowing through them, it means that the connecting line 3 is disconnected from the grounding bus 2. The through-type current transformer 44 will transmit the signal to the microprocessor 41, and then the microprocessor 41 will control the buzzer 5 to alarm, which can effectively remind the staff to prevent people from electric shock. At the same time, it also saves inspection time for subsequent maintenance of a large number of distribution boxes.

[0026] It should be noted that the portion of the connecting wire 3 passing through the through-type current transformer 44 and the portion connected to the ground bus 2 are both bare copper wires. This design allows the through-type current transformer 44 to more sensitively monitor small currents.

[0027] like Figure 3 As shown, in this embodiment, the frame plate 42 is a hollow insulating square tube, and a plurality of placement openings 421 vertically passing through the frame plate 42 are opened on the frame plate 42. The top of the frame plate 42 and on both sides of the placement openings 421 are provided with power connection grooves 422, and power connection copper sheets are provided in the power connection grooves 422.

[0028] The hollow insulating square tube provides effective insulation protection, and various lines can be arranged inside the frame plate 42 to avoid being exposed to the outside.

[0029] like Figure 3 As shown, a through-hole current transformer 44 is mounted within the housing opening 421. Connecting pins are located on either side of the through-hole current transformer 44 and are positioned within the connection slots 422 and in contact with the copper connection sheet. Furthermore, these connecting pins are connected to signal lines that pass through the interior of the frame plate 42 and connect to the microprocessor 41. The signal lines connect the microprocessor 41 to the through-hole current transformer 44.

[0030] In this embodiment, a support frame 43 connected to the inner bottom wall of the distribution box 1 is provided at one end of the frame plate 42 away from the microprocessor 41. The support frame 43 provides the frame plate 42 with sufficient stability.

[0031] like Figure 1 、 Figure 2As shown, a grounding copper wire is installed on the top wall of the grounding busbar 2, passing through the distribution box 1. The other end of the grounding copper wire is connected to a conductive rod inserted into the ground. Furthermore, the portion of the grounding copper wire that contacts the distribution box 1 is bare copper, while the remaining portion is covered with an insulating protective sheath. The exposed portion of the grounding copper wire contacts the distribution box 1, transferring the current from the distribution box 1 underground to ensure personnel safety.

[0032] The working principle of the above embodiment is as follows: before the connecting wire 3 is connected to the grounding bus 2, the connecting wire 3 is passed through the through-type current transformer 44, and the weak current at the upper end of the connecting wire 3 is monitored at all times by the through-type current transformer 44. Once any one or more connecting wires 3 do not have a small current flowing through them, it means that the connecting wire 3 and the grounding bus 2 are disconnected. The through-type current transformer 44 will transmit the signal to the microprocessor 41, and then the microprocessor 41 will control the buzzer 5 to alarm, so as to achieve the effect of reminding the operator not to touch the distribution box 1 to prevent electric shock. At the same time, the microprocessor will also transmit the signal to the control terminal in the background to notify the maintenance personnel to come for maintenance.

[0033] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A ground wire disconnection alarm device for a distribution box, characterized in that: It includes a grounding busbar arranged on the bottom wall of the distribution box, and multiple connecting wires arranged on the grounding busbar. The distribution box is provided with an induction component for monitoring the connecting wires. The induction component includes a microprocessor. A frame plate is provided on one side of the microprocessor. The frame plate is provided with several through-type current transformers respectively mounted on the surfaces of the multiple connecting wires. A buzzer connected to the microprocessor is provided on the outer wall of the distribution box.

2. The ground wire disconnection alarm device for a distribution box according to claim 1, characterized in that: The portion of the connecting wire that passes through the through-type current transformer and the portion that is connected to the grounding bus are both bare copper wires.

3. The ground wire disconnection alarm device for a distribution box according to claim 1, characterized in that: The frame plate is a hollow insulating square tube, and is provided with a plurality of placement openings vertically passing through the frame plate. The top of the frame plate and both sides of the placement openings are provided with power connection grooves, and power connection copper sheets are provided in the power connection grooves.

4. The ground wire disconnection alarm device for a distribution box according to claim 3, characterized in that: The through-type current transformer is arranged in the placement opening, and power connection pins are arranged in the power connection slot and in contact with the power connection copper sheet on both sides of the through-type current transformer.

5. The ground wire disconnection alarm device for a distribution box according to claim 4, characterized in that: The power pin is connected to a signal line that passes through the interior of the frame plate and is connected to the microprocessor.

6. The ground wire disconnection alarm device for a distribution box according to claim 1, characterized in that: One end of the frame plate away from the microprocessor is provided with a support frame connected to the bottom wall of the distribution box.

7. The ground wire disconnection alarm device for a distribution box according to claim 1, characterized in that: A grounding copper wire passing through the distribution box is provided on the inner top wall of the grounding busbar, and a conductive rod inserted into the ground is provided at the other end of the grounding copper wire.

8. The ground wire disconnection alarm device for a distribution box according to claim 7, characterized in that: The portion of the grounding copper wire that contacts the distribution box is a bare copper wire, and the surface of the remaining portion is covered with an insulating protective cover.

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