CN214900162U

CN214900162U - Switch arc extinguishing device

Info

Publication number: CN214900162U
Application number: CN202121418462.7U
Authority: CN
Inventors: 张斌
Original assignee: Taizhou Dacheng Automobile Maintenance Equipment Co ltd
Current assignee: Taizhou Dacheng Automobile Maintenance Equipment Co ltd
Priority date: 2021-06-24
Filing date: 2021-06-24
Publication date: 2021-11-26
Anticipated expiration: 2031-06-24

Abstract

The utility model discloses a switch arc extinguishing device, which belongs to the technical field of electrical equipment and solves the problem that the failure of arc elimination has no feedback mechanism and causes unreliable circuits, and the technical proposal is characterized in that the device comprises a detection module, an MCU module and a switch part, the detection module is connected with the MCU module and is used for detecting the positive power zero crossing point signal on the switch part, the second port of the MCU module is connected with the input end of a photoelectric coupler, the output end of the photoelectric coupler is connected with an electromagnetic coil part, the other end of the electromagnetic coil part is connected with a coil power supply, the electromagnetic coil part drives the switch part in an isolation way, a protective shell is packaged on the switch part, a lightless space is formed in the protective shell and is used for assembling the switch part, a photosensitive sensor is also arranged in the protective shell, the output end of the photosensitive sensor is connected with a comparison circuit, and the output end of the comparison circuit is connected with the third port of the MCU module, the effect of improving the reliability and the safety of the circuit is achieved.

Description

Switch arc extinguishing device

Technical Field

The utility model relates to an electrical equipment field especially relates to a switch arc extinguishing device.

Background

Among the prior art, the patent technology of grant publication No. CN209232671U discloses a switch arc extinguishing device, including relay, control module, detection module and MCU, detection module includes the current transformer who links to each other with the relay and the filter circuit who links to each other with the current transformer output, and filter circuit includes rectifier bridge U1, rectifier bridge U1 the AC input end with the current transformer output links to each other, and DC output and MCU's first input foot link to each other, MCU's third output foot with control module's input links to each other, the third output foot can export the height level that is used for controlling the relay, first input foot can detect the moment that electric current is at zero point, the utility model discloses electric arc when effectively eliminating the switch, extension relay life-span.

However, the circuit can basically eliminate the arc during the switching operation, but when the circuit is actually used, the failure and short circuit of the internal circuit caused by the external influence, such as the change of temperature and humidity, may occur, or, in the working process of the circuit, if the arc is eliminated, there are no effective protection measures to cause the short circuit or further damage of the circuit, which is very disadvantageous.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to prior art's weak point, solve the technical problem in the correlation technique to a certain extent at least, provide a switch arc extinction dress to reach the purpose of further optimizing circuit safety and protective capacities.

In order to solve the technical problem, the technical scheme of the utility model is that: the utility model provides a switch arc extinguishing device, includes detection module, MCU module and switch portion, and detection module connects and is used for detecting the anodal power zero crossing signal in the switch portion in the MCU module, photoelectric coupler's input is connected to the second port of MCU module, and photoelectric coupler's output is connected with solenoid portion, and solenoid portion's the other end is connected with the coil power, and solenoid portion keeps apart the drive the switch portion, be packaged with protective housing in the switch portion, protective housing's inside forms no light space and supplies the assembly of switch portion, still be provided with photosensitive sensor in the protective housing, photosensitive sensor's output is connected with comparison circuit, and comparison circuit's output connects the third port of MCU module.

As a specific aspect of the present invention, it may be preferable that: the comparison circuit comprises a comparator and an adjusting circuit, the in-phase end of the comparator is connected with the photosensitive sensor, the reverse-phase end of the comparator is connected with the adjusting circuit, the adjusting circuit comprises a voltage source Vcc, a resistor R3 and a potentiometer Rp1, the voltage source Vcc is connected with one end of a resistor R3, the other end of the resistor R3 is connected with the reverse-phase end of the comparator and one end of the potentiometer Rp1, and the other end of the potentiometer Rp1 is grounded.

As a specific aspect of the present invention, it may be preferable that: the protective shell is made of insulating materials, and the photosensitive sensor and the switch part are respectively positioned on the inner sides of the protective shell and are fixed oppositely.

As a specific aspect of the present invention, it may be preferable that: the first port of the MCU module is also connected with the input end of the photoelectric coupler through a timer, and the timer is controlled by the MCU module and is started to drive the switch part to close for a fixed time.

As a specific aspect of the present invention, it may be preferable that: and the signal output of the second port of the MCU module is after the timing of the timer is finished.

As a specific aspect of the present invention, it may be preferable that: the protective shell is also coated with a thermochromic coating, and the color change temperature range of the thermochromic coating is 0-70 ℃.

The utility model discloses technical effect mainly embodies in following aspect: 1. the electromagnetic coil part and the switch part are mutually controlled, the switch part is protected by the protective shell, and a lightless closed space is formed, so that the possibility of damage or destruction is reduced, and the service life is prolonged; 2. the photosensitive sensor is adopted in the protective shell to sense electric arcs, if the circuit is out of control and the electric arcs are triggered occasionally, the electric arcs can be detected by the photosensitive sensor, so that the electric arcs are fed back to the MCU module, and the MCU module is controlled to perform open circuit protection in time; 3. a photoelectric coupler is adopted to further isolate the power supply of the MCU module and the power supply of the coil part, so that the reliability and the anti-interference capability of the circuit are improved; 4. the mode that can try to switch on detects the arc emergence to there is the feedback mechanism, forms closed-loop control, follows the action of MCU module control switch portion, whether the action of MCU module collection switch portion is reliable, again according to whether there is the arc emergence to control the operating condition of switch portion, thereby realize reliable closed-loop protection mechanism.

Drawings

FIG. 1 is a schematic circuit diagram in embodiment 1;

FIG. 2 is a schematic circuit diagram in embodiment 2;

FIG. 3 is a schematic diagram showing circuit signals in the case of arc generation in example 2;

FIG. 4 is a schematic diagram of circuit signals when no arc is generated in embodiment 2.

Reference numerals: 100. a detection module; 200. an MCU module; 310. a switch section; 320. an electromagnetic coil section; 400. a photoelectric coupler; 500. a protective housing; 600. a photosensitive sensor; 700. a comparison circuit; 710. a comparator; 720. a regulating circuit; 800. a timer; 900. a thermochromic coating.

Detailed Description

The embodiments of the present invention will be described in detail below, examples of which are illustrated in the accompanying drawings, and the embodiments described below by referring to the drawings are exemplary and intended to explain the present invention so that the technical solutions of the present invention can be more easily understood and grasped, and cannot be construed as limiting the present invention.

Example 1:

a switching arc extinguishing apparatus, as shown in fig. 1, includes a detection module 100, an MCU module 200, and a switching section 310. The detection module 100 is a zero crossing detection circuit. The MCU module 200 is a single chip microcomputer, and the specific model can be an 89C51 single chip microcomputer. The switch portion 310 is represented in the drawings by the character K1-1, which is a popular representation that can be understood by those skilled in the art, as well as: the solenoid portion 320 is denoted by K1, and the comparator 710 is denoted by LM 1. Also for the resistor R1 and the resistor R2, which are configuration resistors in the configuration wiring, the connections made hereinafter may be interpreted as wire connections, as well as connections through resistors.

The core of the scheme is in the design of a hardware circuit principle and a connection structure, the detection module 100 is connected to the MCU module 200 and used for detecting a zero crossing point signal of a positive power supply on the switch part 310, the second port of the MCU module 200 is connected with the input end of the photoelectric coupler 400, the output end of the photoelectric coupler 400 is connected with the electromagnetic coil part 320, the other end of the electromagnetic coil part 320 is connected with a coil power supply, the electromagnetic coil part 320 isolates the driving switch part 310, the switch part 310 is packaged with the protective shell 500, a lightless space is formed inside the protective shell 500 and used for assembling the switch part 310, the protective shell 500 is also internally provided with the photosensitive sensor 600, the output end of the photosensitive sensor 600 is connected with the comparison circuit 700, and the output end of the comparison circuit 700 is connected with the third port of the MCU module 200.

The comparison circuit 700 comprises a comparator 710 and a regulating circuit 720, wherein the non-inverting terminal of the comparator 710 is connected with the photosensitive sensor 600, the inverting terminal of the comparator is connected with the regulating circuit 720, the regulating circuit 720 comprises a voltage source Vcc, a resistor R3 and a potentiometer Rp1, the voltage source Vcc is connected with one end of a resistor R3, the other end of the resistor R3 is connected with the inverting terminal of the comparator 710 and one end of the potentiometer Rp1, and the other end of the potentiometer Rp1 is grounded.

The protective casing 500 is made of an insulating material, and the photosensitive sensor 600 and the switch unit 310 are respectively fixed to the inner side of the protective casing 500.

Therefore, in operation, firstly, the MCU module 200 may indirectly control the solenoid part 320 through the photocoupler 400, and the solenoid part 320 generates magnetic force after being energized to control the on/off of the switch part 310. If the switching part 310 generates an arc when it is turned on, it is detected by the photo sensor 600 in the protection case 500 without light, the signal detected by the photo sensor 600 is screened and judged by the comparing circuit 700 to discharge a normal arc, and when it is judged that the abnormal arc is, the MCU module 200 will know. Where an abnormal arc is present as a high light level, a high level is output on comparator 710. At this time, the MCU module 200 may stop the signal output from the second port in time according to the detected abnormal arc condition, so as to turn off the solenoid portion 320. In this way, the protective housing 500 performs protection and physical isolation, and forms a closed-loop control in cooperation with the photosensitive sensor 600 and the comparison circuit 700.

Example 2:

based on the structural basis of embodiment 1, the design can be further optimized, referring to fig. 2, fig. 3 and fig. 4, the first port of the MCU module 200 is further connected to the input end of the photocoupler 400 through a timer 800, and the timer 800 is controlled by the MCU module 200 and starts to drive the switch portion 310 to close for a fixed duration. The signal output from the second port of the MCU module 200 is after the timer 800 finishes timing.

On the basis of the above hardware structure, the operation mode is that the control signal output by the first port P1 of the MCU module 200 makes the switch chamber of the timer 800 operate, the timer 800 makes the photocoupler 400 conduct for a fixed time, for example, 20 seconds, at this time, the electromagnetic coil part 320 is powered on, so that the switch part 310 is closed for 20 seconds, during this process, if an abnormal arc occurs, as shown in fig. 3, at this time, the third port P3 of the MCU module 200 receives a trigger high level signal, so as to keep the second port P2 of the MCU module 200 at a low level. Referring to fig. 4, if there is no high level trigger at the third port P3 in the process, indicating that there is no abnormal arc, after the timing of the first port P1 is over, the second port P2 continues to provide high level, so that the switch section 310 continues to maintain the on-off state.

In addition, referring to fig. 2, the protective shell 500 is further coated with a thermochromic coating 900, and the thermochromic coating 900 has a color change temperature ranging from 0 to 70 ℃. Since the thermochromic coating 900 is an existing product, it is applied to the protective housing 500, which is helpful for the circuit safety warning function and improves the safety performance.

Finally, a reflective layer, such as a lens, may be disposed within the protective housing 500. This may facilitate the detection of arc light.

Of course, the above is only a typical example of the present invention, and besides, the present invention can also have other various specific embodiments, and all technical solutions adopting equivalent replacement or equivalent transformation are all within the scope of the present invention as claimed.

Claims

1. The utility model provides a switch arc extinguishing device, includes detection module, MCU module and switch portion, and detection module connects and is used for detecting the positive power zero crossing signal in the switch portion in the MCU module, characterized by, photoelectric coupler's input is connected to the second port of MCU module, and photoelectric coupler's output is connected with solenoid portion, and solenoid portion's the other end is connected with the coil power, and solenoid portion keeps apart the drive switch portion, it has protective housing to be packaged with in the switch portion, protective housing's inside forms no light space and supplies switch portion assembly, still be provided with photosensitive sensor in the protective housing, photosensitive sensor's output is connected with comparison circuit, and comparison circuit's output connects MCU module's third port.

2. A switching arc suppression device according to claim 1, wherein: the comparison circuit comprises a comparator and an adjusting circuit, the in-phase end of the comparator is connected with the photosensitive sensor, the reverse-phase end of the comparator is connected with the adjusting circuit, the adjusting circuit comprises a voltage source Vcc, a resistor R3 and a potentiometer Rp1, the voltage source Vcc is connected with one end of a resistor R3, the other end of the resistor R3 is connected with the reverse-phase end of the comparator and one end of the potentiometer Rp1, and the other end of the potentiometer Rp1 is grounded.

3. A switching arc suppression device according to claim 1, wherein: the protective shell is made of insulating materials, and the photosensitive sensor and the switch part are respectively positioned on the inner sides of the protective shell and are fixed oppositely.

4. A switching arc suppression device according to claim 1, wherein: the first port of the MCU module is also connected with the input end of the photoelectric coupler through a timer, and the timer is controlled by the MCU module and is started to drive the switch part to close for a fixed time.

5. A switching arc suppression device according to claim 4, wherein: and the signal output of the second port of the MCU module is after the timing of the timer is finished.

6. A switching arc suppression device according to claim 1, wherein: the protective shell is also coated with a thermochromic coating, and the color change temperature range of the thermochromic coating is 0-70 ℃.