A switch device with arc detection function

Abstract

The present invention relates to a switch device with an arc detection function, comprising a switch box, wherein a power supply board suitable for high voltage input, an arc detection circuit board and a switch assembly are arranged in the switch box, wherein the power supply board is connected to the arc detection circuit board and the switch assembly respectively, and the arc detection circuit board is connected to the switch assembly. In such a configuration, the arc detection circuit board detects whether an arc signal is generated by a wire connected thereto, and controls the opening and closing of the switch assembly to realize arc capture, so that when an arc fault occurs, the circuit can be quickly and effectively cut off, thereby minimizing the harm caused by the arc fault.

Description

Technical Field

[0001] The present invention relates to the technical field of arc detection, and in particular to a switch device with an arc detection function. Background Art

[0002] Arcing is a common phenomenon in electrical equipment. It is caused by the gas discharge generated when the current is disconnected or connected to the circuit. Arcing not only causes damage to the equipment, but may also cause safety risks such as fire and electric shock. Accurately detecting and promptly handling arcs is one of the important tasks of electrical equipment protection. The basic principle of arc detection is to determine whether an arc fault has occurred by measuring the existence and characteristics of the arc. How to accurately and quickly cut off the arc to protect the interests of users and avoid property losses, so an electromagnetic trip switch with arc detection function has been developed, which can detect and quickly disconnect the switch. Summary of the invention

[0003] The purpose of the present invention is to overcome the shortcomings and deficiencies of the prior art and to provide a switch device with an arc detection function, including a switch box, wherein the switch box is provided with a power supply board suitable for high voltage input, an arc detection circuit board and a switch assembly, the power supply board is respectively connected to the arc detection circuit board and the switch assembly, and the arc detection circuit board is connected to the switch assembly.

[0004] Preferably, baffles are provided between each of the power board, arc detection circuit board and switch assembly, and the power board, arc detection circuit board and switch assembly are connected by wires, and the baffles are provided with through holes for the wires to pass through.

[0005] Preferably, the arc detection circuit board comprises an arc detection main control board and an arc detection measurement board, the arc detection main control board is arranged on the upper plate of the switch box, and the arc detection measurement board is arranged on the lower plate of the switch box.

[0006] Preferably, the baffle includes a first baffle arranged between the power board and the arc detection circuit board, a second baffle arranged between the arc detection circuit board and the switch assembly, and a third baffle arranged between the power board and the switch assembly, and the through hole includes a first through hole arranged on the first baffle, a second through hole arranged on the second baffle, and a third through hole arranged on the third baffle, the first through hole and the third through hole are respectively arranged above the first baffle and the third baffle, and the second through hole is arranged corresponding to the place where the switch is connected on the switch assembly.

[0007] Preferably, the switch assembly is also provided with a rotary button for controlling the opening and closing state of the switch assembly and a matching piece for matching the rotary button, the switch box is provided with a fourth through hole adapted to the matching piece, and the rotary button is arranged to pass through the fourth through hole and connect with the matching piece.

[0008] Preferably, the switch box is provided with a ventilation valve and a plurality of waterproof joints.

[0009] Preferably, the switch box is provided with an indicator light for displaying the status of the switch assembly and a jog button for restarting the switch assembly.

[0010] Preferably, the power board includes a high-voltage power module, the arc detection circuit board includes an arc detection module and an arc cutoff module, and the high-voltage power module includes an input power module, a control module, a switch module, an isolation transformer module, an output module and a protection module;

[0011] The input power module is provided with an input terminal connected to the power system, and its output terminal is connected to the control module for supplying power to the control module;

[0012] The control module is used to control the opening and closing of the switch module;

[0013] The voltage output by the output module is used to power the arc detection module;

[0014] The arc detection module is connected to the arc cutting module and is used to monitor the arc signal in the power system and transmit the arc signal to the arc cutting module;

[0015] The arc cutting module is used to cut off the power system according to the arc signal;

[0016] Among them, the protection module includes a first protection module and a second protection module, the first protection module is connected to the input power module and the control module respectively, and is used to limit the stable output of the electrical signal from the input power module to the control module; the second protection module is connected to the switch module.

[0017] Preferably, one end of the first protection module is connected to the output end of the input power module, and the other end is connected to the over-voltage and under-voltage protection port of the control module.

[0018] The beneficial effects of the present invention are as follows: the arc detection circuit board detects whether the wire connected to it generates an arc signal, and controls the opening and closing of the switch component to achieve arc capture, so that when an arc fault occurs, the circuit can be cut off quickly and effectively, thereby minimizing the harm caused by the arc fault. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, without paying creative labor, other drawings obtained based on these drawings still belong to the scope of the present invention.

[0020] Figure 1 It is a structural schematic diagram of the present invention;

[0021] Figure 2 It is a schematic diagram of the structure of the present invention with the upper cover plate removed;

[0022] Figure 3 It is a structural schematic diagram of the lower cover plate in the present invention;

[0023] Figure 4 It is a principle block diagram of the present invention;

[0024] Figure 5 It is a partial circuit diagram of the present invention;

[0025] Figure 6 This is another circuit diagram of the present invention. DETAILED DESCRIPTION

[0026] In order to make the objectives, technical solutions and advantages of the present invention more clear, the present invention will be further described in detail below with reference to the accompanying drawings.

[0027] It should be noted that all expressions using "first" and "second" in the embodiments of the present invention are for distinguishing two non-identical entities with the same name or non-identical parameters. It can be seen that "first" and "second" are only for the convenience of expression and should not be understood as limitations on the embodiments of the present invention. The subsequent embodiments will not explain this one by one.

[0028] The directions and positions mentioned in the present invention, such as "upper", "lower", "front", "back", "left", "right", "inside", "outside", "top", "bottom", "side", etc., are only for reference to the directions or positions of the drawings. Therefore, the directions and positions used are for explaining and understanding the present invention, but not for limiting the scope of protection of the present invention.

[0029] like Figures 1 to 6 As shown, in an embodiment of the present invention, a switch box 1 is included, in which a power board 2 suitable for high voltage input, an arc detection circuit board 3 and a switch assembly 4 are provided, the power board 2 is connected to the arc detection circuit board 3 and the switch assembly 4 respectively, and the arc detection circuit board 3 is connected to the switch assembly 4.

[0030] Baffles 5 are provided between each of the power board 2, arc detection circuit board 3 and switch assembly 4, and the power board 2, arc detection circuit board 3 and switch assembly 4 are connected by wires. The baffles 5 are provided with through holes 51 for the wires to pass through.

[0031] The arc detection circuit board 3 includes an arc detection main control board 31 and an arc detection measurement board 32 . The arc detection main control board 31 is arranged on the upper cover plate 11 of the switch box 1 , and the arc detection measurement board 32 is arranged on the lower cover plate 12 of the switch box 1 .

[0032] The baffle plate 5 includes a first baffle plate 52 arranged between the power board 2 and the arc detection circuit board 3, a second baffle plate 53 arranged between the arc detection circuit board 3 and the switch assembly 4, and a third baffle plate 54 arranged between the power board 2 and the switch assembly 4. The through hole 51 includes a first through hole 521 arranged on the first baffle plate 52, a second through hole 531 arranged on the second baffle plate 53, and a third through hole 541 arranged on the third baffle plate 54. The first through hole 521 and the third through hole 541 are respectively arranged above the first baffle plate 52 and the third baffle plate 54, and the second through hole 531 is arranged corresponding to the place where the switch on the switch assembly 4 is connected.

[0033] The switch assembly 4 is also provided with a rotary button 41 for controlling the on / off state of the switch assembly 4 and a matching piece for matching the rotary button. The switch box 1 is provided with a fourth through hole 411 matching the matching piece. The rotary button 41 is arranged to pass through the fourth through hole 411 and connect with the matching piece.

[0034] The switch box 1 is provided with a vent valve 13 and a plurality of waterproof joints 14 .

[0035] The switch box 1 is provided with an indicator light 15 for displaying the state of the switch assembly and a jog button 16 for restarting the switch assembly.

[0036] The power board 2 includes a high-voltage power module 21, the arc detection circuit board 3 includes an arc detection module 33 and an arc cutoff module 34, and the high-voltage power module 21 includes an input power module 211, a control module 212, a switch module 213, an isolation transformer module 214, an output module 215 and a protection module;

[0037] The input power module 211 is provided with an input terminal connected to the power system, and its output terminal is connected to the control module 212 for supplying power to the control module 212;

[0038] The control module 212 is used to control the opening and closing of the switch module 213. The switch module 213 is connected to the output module 215, and an isolation transformer module 214 is also provided between the switch module 213 and the output module 215.

[0039] The voltage output by the output module 215 is used to power the arc detection module 33;

[0040] The arc detection module 33 is connected to the arc cutting module 34 and is used to monitor the arc signal in the power system and transmit the arc signal to the arc cutting module 34;

[0041] The arc cutting module 34 is used to cut off the power system according to the arc signal;

[0042] Among them, the protection module includes a first protection module 216 and a second protection module 217, the first protection module 216 is respectively connected to the input power module 211 and the control module 212, and is used to limit the stable output of the electrical signal from the input power module 211 to the control module 212; the second protection module 217 is connected to the switch module 213.

[0043] One end of the first protection module 216 is connected to the output end of the input power module 211 , and the other end is connected to the over-voltage and under-voltage protection port of the control module 212 .

[0044] It can be understood that the high-voltage power supply module 21 can convert the high-voltage signal into a low-voltage signal suitable for the arc detection module 33. At the same time, the first protection module 216 can stabilize the electrical signal output by the input power supply module 211 to avoid voltage and current spikes, ringing and other problems. The second protection module 217 can protect the switch module 213 in a safe state under high voltage environment; the arc detection module 33 cooperates with the arc cutting module 34 so that when an arc fault occurs, the circuit can be cut off quickly and effectively, thereby minimizing the harm caused by the arc fault.

[0045] In this embodiment, the input power module 211 rectifies the electrical signal through the unidirectional conductivity rectification of the diode, and a thermistor and a varistor are connected between the positive and negative ends of the input end of the input power module 211. In this embodiment, the chip of the control module 212 can be a power management chip such as BTS4140N, EG1163S, AH8669, JW5116F and MP1476.

[0046] In this embodiment, the input power module 211 is used to filter out noise in the input voltage, ensure the stability of the input voltage, and prevent the noise generated by the power supply from being transmitted to the outside.

[0047] The switch module 213 is used to control the transmission of energy, and the isolation transformer module 214 is used to isolate the input and output circuits and transmit energy through the principle of electromagnetic induction;

[0048] The output module 215 includes a filter circuit to filter the output voltage to ensure output stability.

[0049] One end of the first protection module 216 is connected to the output end of the input power module 211 , and the other end is connected to the over-voltage and under-voltage protection port of the control module 212 .

[0050] It is understandable that the over-voltage and under-voltage protection ports inside the control module 212 chip are connected to a voltage detection circuit. When the detected voltage exceeds the set over-voltage threshold or is lower than the under-voltage threshold, the chip will take corresponding protection measures. For example, in the case of overvoltage, the chip may immediately stop the operation of the switch module 213 and cut off the power output; in the case of undervoltage, the chip may suspend operation or send an alarm signal and wait for the voltage to return to normal before restarting.

[0051] The switch module 213 is a transistor, the collector of which is respectively connected to the isolation transformer module 214 and the second protection module 217 , and the second protection module 217 is connected in parallel with the isolation transformer module 214 .

[0052] The base of the transistor is connected to the overcurrent protection port of the control module 212 through the second protection module 217 .

[0053] The third protection module 218 is included and the third protection module 218 is connected in parallel with the input end of the input power module 211 .

[0054] It can be understood that, in this embodiment, the third protection module 218 is a circuit formed by a plurality of capacitor and resistor parallel units connected in series in sequence.

[0055] The arc cutting module 34 is a tripper, which includes an optical coupling module and a switch tube. The optical coupling module is connected to the arc detection module 33 and controls the switch state of the switch tube according to the arc signal.

[0056] It is understandable that the releaser is common knowledge, and the releaser will not be described in detail here.

[0057] It includes a voltage conversion module 219 , which is connected to the high-voltage power supply module 21 and the arc detection module 33 respectively, and is used to convert the power supply voltage output by the high-voltage power supply module 21 into the working voltage of the arc detection module 33 .

[0058] It can be understood that, in this embodiment, the voltage output by the output module 215 is much higher than the working voltage of the arc detection module 33, and the voltage conversion module 219 can use any chip with voltage conversion function. In the present invention, the chip used by the voltage conversion module 219 is MD5333.

[0059] The first protection module 216 includes a circuit formed by connecting a plurality of capacitor and resistor parallel units in series.

[0060] The second protection module 217 includes a plurality of transient voltage suppression diodes, and the transient voltage suppression diode is reversely connected to the transistor. It is understandable that a diode is further provided between the transistor and the transient voltage suppression diode, and the anode of the diode is connected to the transistor, the cathode of the diode is connected to the cathode of the transient voltage suppression diode, and the diode and the transient voltage suppression diode are connected in parallel with a coil in the isolation transformer module 214.

[0061] The maximum range of the power supply voltage connected to the input terminal of the input power module 211 is 1490-1510V.

[0062] A person skilled in the art can understand that all or part of the steps in the above-mentioned embodiment method can be completed by instructing related hardware through a program, and the program can be stored in a computer-readable storage medium, such as ROM / RAM, disk, CD-ROM, etc.

[0063] The above disclosure is only the preferred embodiment of the present invention, which certainly cannot be used to limit the scope of the present invention. Therefore, equivalent changes made according to the claims of the present invention are still within the scope of the present invention.

[0064] It should be noted that the embodiments of the present invention can be implemented by hardware, software or a combination of software and hardware. The hardware part can be implemented using dedicated logic; the software part can be stored in a memory and executed by an appropriate instruction execution system, such as a microprocessor or dedicated design hardware. Those skilled in the art will appreciate that the above-mentioned devices and methods can be implemented using computer executable instructions and / or contained in processor control codes, such as such codes provided on a programmable memory or a data carrier such as an optical or electronic signal carrier.

[0065] In addition, although the operation of the method of the present invention is described in a particular order in the accompanying drawings, this does not require or imply that these operations must be performed in this particular order, or that all the operations shown must be performed to achieve the desired result. On the contrary, the steps described in the flow chart can change the order of execution. Additionally or alternatively, some steps can be omitted, multiple steps can be combined into one step for execution, and / or one step can be decomposed into multiple steps for execution. It should also be noted that the features and functions of two or more devices according to the present invention can be embodied in one device. On the contrary, the features and functions of a device described above can be further divided into being embodied by multiple devices.

[0066] Although the invention has been described with reference to several specific embodiments, it should be understood that the invention is not limited to the specific embodiments disclosed. The invention is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.

Claims

1. A switch device with arc detection function, characterized in that: The invention comprises a switch box (1), wherein a power supply board (2) suitable for high voltage input, an arc detection circuit board (3) and a switch assembly (4) are arranged inside the switch box (1), wherein the power supply board (2) is connected to the arc detection circuit board (3) and the switch assembly (4) respectively, and the arc detection circuit board (3) is connected to the switch assembly (4).

2. The switch device with arc detection function according to claim 1, characterized in that: Baffles (5) are provided between each of the power board (2), the arc detection circuit board (3) and the switch assembly (4), and the power board (2), the arc detection circuit board (3) and the switch assembly (4) are connected by wires, and the baffles (5) are provided with through holes (51) for the wires to pass through.

3. The switch device with arc detection function according to claim 1, characterized in that: The arc detection circuit board (3) comprises an arc detection main control board (31) and an arc detection measurement board (32); the arc detection main control board (31) is arranged on an upper cover plate (11) of a switch box (1); and the arc detection measurement board (32) is arranged on a lower cover plate (12) of the switch box (1).

4. The switch device with arc detection function according to claim 2, characterized in that: The baffle plate (5) comprises a first baffle plate (52) arranged between the power supply plate (2) and the arc detection circuit board (3), a second baffle plate (53) arranged between the arc detection circuit board (3) and the switch assembly (4), and a third baffle plate (54) arranged between the power supply plate (2) and the switch assembly (4); the through hole (51) comprises a first through hole (521) arranged on the first baffle plate (52), a second through hole (531) arranged on the second baffle plate (53), and a third through hole (541) arranged on the third baffle plate (54); the first through hole (521) and the third through hole (541) are arranged above the first baffle plate (52) and the third baffle plate (54), respectively; and the second through hole (531) is arranged at a location corresponding to a switch connection on the switch assembly (4).

5. The switch device with arc detection function according to claim 1, characterized in that: The switch assembly (4) is also provided with a rotary button (41) for controlling the on / off state of the switch assembly (4) and a matching piece for matching the rotary button; the switch box (1) is provided with a fourth through hole (411) matching the matching piece; the rotary button (41) is arranged to pass through the fourth through hole (411) and is connected to the matching piece.

6. The switch device with arc detection function according to claim 1, characterized in that: The switch box (1) is provided with a vent valve (13) and a plurality of waterproof joints (14).

7. The switch device with arc detection function according to claim 1, characterized in that: The switch box (1) is provided with an indicator light (15) for displaying the state of the switch assembly (4) and a jog button (16) for restarting the indicator light (15).

8. The switch device with arc detection function according to claim 3, characterized in that: The power board (2) comprises a high-voltage power module (21), the arc detection circuit board (3) comprises an arc detection module (33) and an arc cutoff module (34), and the high-voltage power module (21) comprises an input power module (211), a control module (212), a switch module (213), an isolation transformer module (214), an output module (215) and a protection module; The input power module (211) is provided with an input end connected to the power system, and its output end is connected to the control module (212) for supplying power to the control module (212); The control module (212) is used to control the opening and closing of the switch module (213); the switch module (213) is connected to the output module (215); and an isolation transformer module (214) is further provided between the switch module (213) and the output module (215); The voltage output by the output module (215) is used to supply power to the arc detection module (33); The arc detection module (33) is connected to the arc cutting module (34) and is used to monitor arc signals in the power system and transmit the arc signals to the arc cutting module (34); The arc cutting module (34) is used to cut off the power system according to the arc signal; The protection module comprises a first protection module (216) and a second protection module (217); the first protection module (216) is connected to the input power module (211) and the control module (212) respectively, and is used to limit the stable output of the electrical signal from the input power module (211) to the control module (212); and the second protection module (217) is connected to the switch module (213).

9. The switch device with arc detection function according to claim 8, characterized in that: One end of the first protection module (216) is connected to the output end of the input power module (211), and the other end is connected to the over-voltage and under-voltage protection port of the control module (212).

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