CN221263365U - Self-checking power-off protection circuit of dormitory building block terminal - Google Patents
Self-checking power-off protection circuit of dormitory building block terminalInfo
- Publication number
- CN221263365U CN221263365U CN202322698644.XU CN202322698644U CN221263365U CN 221263365 U CN221263365 U CN 221263365U CN 202322698644 U CN202322698644 U CN 202322698644U CN 221263365 U CN221263365 U CN 221263365U
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- diode
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- optocoupler
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- 238000001514 detection method Methods 0.000 claims abstract description 36
- 238000009529 body temperature measurement Methods 0.000 claims abstract description 10
- 239000003990 capacitor Substances 0.000 claims description 22
- 230000005540 biological transmission Effects 0.000 claims 3
- 238000012423 maintenance Methods 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 5
- 230000002159 abnormal effect Effects 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Abstract
The utility model relates to the technical field of power-off protection circuits, in particular to a self-checking power-off protection circuit of a dormitory building distribution box, which comprises a protection circuit, a detection circuit, a main control chip and a temperature measurement circuit, wherein the protection circuit is used for timely cutting off the circuit when an accident occurs, the detection circuit is used for detecting the on-off state of the circuit and sending signals to the main control chip, the main control chip is used for receiving the signals sent by the detection circuit and sending out open-circuit reminding and temperature data, and the temperature measurement circuit is used for measuring the temperature when the open circuit occurs. According to the utility model, whether the circuit is cut off or not is detected by the detection module, and when the circuit is cut off, the main control chip sends the cut-off reminding and temperature data, so that workers can know the situation in time, and follow-up maintenance is facilitated.
Description
Technical Field
The utility model relates to the technical field of power-off protection circuits, in particular to a self-checking power-off protection circuit of a dormitory building distribution box.
Background
The distribution box of dormitory building is equipped with the outage protection circuit generally, but because partial dormitory building circuit ages, the outage condition can appear, and the student most need be on lessons on the day, can't discover in time after the distribution box opens circuit, wait for the student to report the problem when returning to the dormitory building after, still need extra time to repair, have brought trouble for the student life, consequently need protection circuit send outage information to the staff when cutting off the power.
The utility model patent with publication number CN215498243U discloses a leakage protection system of a distribution box, which comprises a circuit breaker and a zero sequence current protection circuit, wherein the circuit breaker is connected in series in a three-phase power supply branch of the distribution box; the three phases of the three-phase power supply branch are respectively and electrically connected with a first current transformer, and secondary winding ends of the first current transformers are mutually connected in parallel and are electrically connected with a current input end of the zero sequence current protection circuit; and the signal output end of the zero sequence current protection circuit is electrically connected with the coil end of the circuit breaker, so that when the zero sequence current exceeds the setting value of the zero sequence current protection circuit, the power supply of the three-phase power supply branch circuit is cut off through the circuit breaker.
Although the utility model can detect whether zero sequence current exists in the three-phase power supply branch circuit of the distribution box in real time and cut off power supply when the zero sequence current exceeds the setting value of the protection circuit, after the power supply is cut off, workers cannot know the power-off condition in time, and trouble is brought to daily electricity and life.
Disclosure of utility model
The utility model aims to provide a self-checking power-off protection circuit of a dormitory building distribution box, which is used for solving the problem that the power-off condition cannot be known in time in the background technology.
In order to achieve the above purpose, the present utility model provides the following technical solutions:
The utility model provides a self-checking power-off protection circuit of dormitory building block terminal, includes protection circuit, detection circuit, main control chip and temperature measurement circuit, protection circuit is used for in time cutting off the circuit when taking place the accident, detection circuit is used for detecting circuit break-make and to main control chip send signal, main control chip is used for receiving detection circuit sends the signal and outwards sends out and opens circuit and reminds and temperature data, temperature measurement circuit is used for measuring the temperature when opening circuit takes place.
Preferably, the detection circuit comprises a current transformer TA for measuring zero line and live line currents, the current transformer TA is connected with a second capacitor C2 and a rectification circuit which are connected in parallel, the output end of the rectification circuit is connected with a third capacitor C3, a second resistor R2 and a fourth capacitor C4 which are connected in parallel, a second switch S2 is arranged on the zero line and the live line, a direct current tripping device KM, a thyristor VS and a fifth diode VD5 which are connected in series are arranged between the zero line and the live line, the anode of the thyristor VS is connected with the direct current tripping device KM, the cathode of the thyristor VS is connected with the anode of the fifth diode VD5, the gate of the thyristor VS is connected with one output end of the rectification circuit, and the other output end of the rectification circuit is connected between the anode of the fifth diode VD5 and the cathode of the thyristor VS.
Preferably, the rectifying circuit is a full-bridge rectifying circuit, and the first diode VD1, the second diode VD2, the third diode VD3, and the fourth diode VD4 constituting the rectifying circuit have the same specifications.
Preferably, a first capacitor C1 is further installed between the neutral line and the live line, and the first switch S1 and the first resistor R1 are connected in series and then connected in parallel with the first capacitor C1.
Preferably, the detection circuit includes a sixth diode D6 with an anode connected with a live wire, a cathode of the sixth diode D6 is connected with a third resistor R3, the other end of the third resistor R3 is connected with a pin 1 of the optocoupler, a zero line is connected with a fourth resistor R4, the other end of the fourth resistor R4 is connected with a pin 2 of the optocoupler, the pin 2 of the optocoupler is connected with an anode of a seventh diode VD7, the pin 1 of the optocoupler is connected with a cathode of the seventh diode VD7, a fifth resistor R5 is connected between the cathode of the seventh diode VD7 and the anode in parallel, the pin 3 of the optocoupler is grounded, a fifth capacitor C5 is connected between the pin 3 of the optocoupler and the pin 4 of the optocoupler, the pin 4 of the optocoupler is connected with a sixth resistor R6, and the other end of the sixth resistor R6 is connected with a first power supply and the master control chip.
Preferably, a detection module, a control module, a recording module and an information sending module are arranged in the main control chip, the detection module is used for detecting the high level sent by the detection circuit, the control module is used for controlling the recording module, the information sending module and the temperature measuring circuit to work, and the information sending module is used for sending recorded temperature information.
Preferably, the temperature measuring circuit comprises a second power supply, the power supply is connected with a seventh resistor R7, the other end of the seventh resistor R7 is connected with the anode of an eighth diode VD8, the cathode of the eighth diode VD8 is connected with the anode of a ninth diode VD9, and the cathode of the ninth diode VD9 is grounded.
Compared with the prior art, the utility model has the beneficial effects that:
According to the utility model, whether the zero line and the live line are disconnected or not is detected by arranging the detection circuit, and when the zero line and the live line are disconnected, the detection circuit sends a high level to the detection module of the main control chip, the temperature measurement circuit works to measure the temperature when the power is off, so that help is provided for maintenance, and the information sending module sends power off reminding and temperature data, so that workers can conveniently arrive at maintenance in time, time is saved, and the power consumption requirement of students is ensured.
Drawings
FIG. 1 is a schematic diagram of the overall structure of the utility model;
FIG. 2 is a circuit diagram of a protection circuit, a detection circuit and a main control chip in the utility model;
FIG. 3 is a circuit diagram of the protection circuit of the utility model;
FIG. 4 is a circuit diagram of a detection circuit and a master control chip in the utility model;
FIG. 5 is a circuit diagram of a main control chip and a temperature measuring circuit in the utility model.
In the figure:
1. A protection circuit;
2. a detection circuit;
3. A main control chip; 30. a detection module; 31. a control module; 32. a recording module; 33. an information transmitting module;
4. and a temperature measuring circuit.
Detailed Description
The following description of the embodiments of the present utility model will be made more apparent and fully hereinafter with reference to the accompanying drawings, in which some, but not all embodiments of the utility model are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Referring to fig. 1-5, the present utility model provides the following technical solutions:
The utility model provides a self-checking power-off protection circuit of dormitory building block terminal, including protection circuit 1, detection circuit 2, main control chip 3 and temperature measurement circuit 4, protection circuit 1 is used for in time cutting off the circuit when taking place the accident, detection circuit 2 is used for detecting circuit break-make and sends the signal to main control chip 3, main control chip 3 is used for receiving detection circuit 2 and sends out the warning of breaking circuit and temperature data outward, temperature measurement circuit 4 is used for measuring the temperature when breaking circuit takes place, after cutting off the circuit, the staff can in time acquire the warning of breaking circuit and temperature data, can arrive in time and overhaul, ensure student's power consumption demand.
In this embodiment, the detection circuit 2 includes a current transformer TA for measuring the current of the zero line and the live line, the current transformer TA is connected with a second capacitor C2 and a rectifying circuit in parallel, the output end of the rectifying circuit is connected with a third capacitor C3, a second resistor R2 and a fourth capacitor C4 in parallel, a second switch S2 is installed on the zero line and the live line, a dc release KM, a thyristor VS and a fifth diode VD5 are installed between the zero line and the live line in series, the anode of the thyristor VS is connected with the dc release KM, the cathode of the thyristor VS is connected with the anode of the fifth diode VD5, the gate of the thyristor VS is connected with one of the output ends of the rectifying circuit, the other output end of the rectifying circuit is connected between the anode of the fifth diode VD5 and the cathode of the thyristor VS, the thyristor VS is NEC2P4M for controlling the power supply of the dc release KM, and when the current transformer detects that the current in the zero line and the live line is abnormal, the coil of the dc release KM gets the power action, and the second switch S2 is disconnected.
Specifically, the rectifying circuit is a full-bridge rectifying circuit, and the first diode VD1, the second diode VD2, the third diode VD3 and the fourth diode VD4 forming the rectifying circuit have the same specifications and are used for converting alternating current into direct current.
Further, a first capacitor C1 is further installed between the zero line and the live line, and the first switch S1 and the first resistor R1 are connected in series and then connected in parallel with the first capacitor C1 to serve as an absorption circuit protection thyristor VS.
In addition, the detection circuit 2 includes a sixth diode D6 with an anode connected to the live wire, a third resistor R3 is connected to a cathode of the sixth diode D6, the other end of the third resistor R3 is connected to a pin 1 of the optocoupler, a zero line is connected to a fourth resistor R4, the other end of the fourth resistor R4 is connected to a pin 2 of the optocoupler, the pin 2 of the optocoupler is connected to an anode of a seventh diode VD7, the pin 1 of the optocoupler is connected to a cathode of the seventh diode VD7, a fifth resistor R5 is connected in parallel between the cathode and the anode of the seventh diode VD7, the pin 3 of the optocoupler is grounded, a fifth capacitor C5 is connected between the pin 3 of the optocoupler and the pin 4 of the optocoupler, the pin 4 of the optocoupler is connected to the sixth resistor R6, the other end of the sixth resistor R6 is connected to a first power supply and the master chip 3, the optocoupler is PC817, the pin 1 is an anode, the pin 2 is a cathode, the pin 3 is a half-period, the pin 4 is a collector, the first power supply is usually 3.3V, and when in normal operation, the positive, the optocoupler and the pins 3 and 4 are approximately on, the negative level, the fifth capacitor C5 is still on and the negative level, the fifth capacitor C is still is turned off after the live wire is turned off, and the live wire is turned off.
It should be noted that, the main control chip 3 is provided with a detection module 30, a control module 31, a recording module 32 and an information sending module 33, the detection module 30 is used for detecting the high level sent by the detection circuit 2, the control module 31 is used for controlling the recording module 32, the information sending module 33 and the temperature measuring circuit 4 to work, the information sending module 33 is used for sending recorded temperature information, so that the staff can know the power-off reminding and the temperature data in time.
It is noted that the temperature measurement circuit 4 includes a second power supply, the power supply is connected to the seventh resistor R7, the other end of the seventh resistor R7 is connected to the anode of the eighth diode VD8, the cathode of the eighth diode VD8 is connected to the anode of the ninth diode VD9, the cathode of the ninth diode VD9 is grounded, the second power supply is usually 5V, the eighth diode VD8 and the ninth diode VD9 are both IN4148, the voltage drop of the tube is 0.7V at 25 ℃, and the voltage drop of the tube is 2.1mV per 1 degree celsius.
When the self-checking power-off protection circuit of the dormitory building distribution box is used, the protection circuit 1 performs electric leakage protection on the circuit, when an electric leakage accident occurs, the current transformer TA detects abnormal current in a zero line and a live line, the thyristor VS controls the coil of the direct-current release KM to be electrified, the second switch S2 is disconnected, the circuit is disconnected and used for protecting the safety of the circuit, and the first capacitor C1 and the first resistor R1 form an absorption circuit protection thyristor VS;
When the zero line and the live line work normally, in the normal work, the optocoupler is conducted in the positive half period of alternating current, the 3 pin and the 4 pin are approximately disconnected to output a low level, in the negative half period of the alternating current, the optocoupler is not conducted, the fifth capacitor C5 is charged to still output a low level, and after the zero line and the live line are disconnected, the optocoupler is not conducted to output a high level;
After the detection module 30 in the main control chip 3 detects the high level, the control module 31 is driven to work, the temperature measuring circuit 4 works along with the high level, the temperature when the disconnection occurs is measured, the temperature data are transmitted to the recording module 32, and the information transmitting module 33 transmits the disconnection reminding and the temperature data to the staff, so that the staff can conveniently arrive at maintenance in time.
The foregoing has shown and described the basic principles, principal features and advantages of the utility model. It will be understood by those skilled in the art that the present utility model is not limited to the above-described embodiments, and that the above-described embodiments and descriptions are only preferred embodiments of the present utility model, and are not intended to limit the utility model, and that various changes and modifications may be made therein without departing from the spirit and scope of the utility model as claimed. The scope of the utility model is defined by the appended claims and equivalents thereof.
Claims (7)
1. The utility model provides a self-checking power-off protection circuit of dormitory building block terminal, includes protection circuit (1), detection circuit (2), main control chip (3) and temperature measurement circuit (4), its characterized in that: the protection circuit (1) is used for timely cutting off the circuit when an accident occurs, the detection circuit (2) is used for detecting the on-off state of the circuit and sending signals to the main control chip (3), the main control chip (3) is used for receiving the signals sent by the detection circuit (2) and sending out open circuit reminding and temperature data, and the temperature measuring circuit (4) is used for measuring the temperature when the open circuit occurs.
2. The self-checking outage protection circuit for a dormitory-floor power distribution box according to claim 1, wherein: the detection circuit (2) comprises a current transformer TA for measuring zero line and live line currents, the current transformer TA is connected with a second capacitor C2 and a rectifying circuit which are connected in parallel, the output end of the rectifying circuit is connected with a third capacitor C3, a second resistor R2 and a fourth capacitor C4 which are connected in parallel, a second switch S2 is arranged on the zero line and the live line, a direct current tripping device KM, a thyristor VS and a fifth diode VD5 which are connected in series are arranged between the zero line and the live line, the anode of the thyristor VS is connected with the direct current tripping device KM, the cathode of the thyristor VS is connected with the anode of the fifth diode VD5, the gate of the thyristor VS is connected with one output end of the rectifying circuit, and the other output end of the rectifying circuit is connected between the anode of the fifth diode VD5 and the cathode of the thyristor VS.
3. The self-checking outage protection circuit for a dormitory-floor power distribution box according to claim 1, wherein: the rectifying circuit is a full-bridge rectifying circuit, and the specifications of a first diode VD1, a second diode VD2, a third diode VD3 and a fourth diode VD4 which form the rectifying circuit are the same.
4. The self-checking outage protection circuit for a dormitory-floor power distribution box according to claim 1, wherein: a first capacitor C1 is further arranged between the zero line and the live line, and the first switch S1 and the first resistor R1 are connected in series and then connected with the first capacitor C1 in parallel.
5. The self-checking outage protection circuit for a dormitory-floor power distribution box according to claim 1, wherein: the detection circuit (2) comprises a sixth diode D6 with an anode connected with a live wire, a cathode of the sixth diode D6 is connected with a third resistor R3, the other end of the third resistor R3 is connected with an optocoupler 1 pin, a zero line is connected with a fourth resistor R4, the other end of the fourth resistor R4 is connected with an optocoupler 2 pin, the optocoupler 2 pin is connected with an anode of a seventh diode VD7, the optocoupler 1 pin is connected with a cathode of the seventh diode VD7, a fifth resistor R5 is connected between the cathode of the seventh diode VD7 and the anode in parallel, the foot of the optocoupler 3 is grounded, a fifth capacitor C5 is connected between the foot of the optocoupler 3 and the foot of the optocoupler 4, the foot of the optocoupler 4 is connected with a sixth resistor R6, and the other end of the sixth resistor R6 is connected with a first power supply and the main control chip (3).
6. The self-checking outage protection circuit for a dormitory-floor power distribution box according to claim 1, wherein: the main control chip (3) is internally provided with a detection module (30), a control module (31), a recording module (32) and an information transmission module (33), wherein the detection module (30) is used for detecting the high level sent by the detection circuit (2), the control module (31) is used for controlling the recording module (32), the information transmission module (33) and the temperature measurement circuit (4) to work, and the information transmission module (33) is used for transmitting recorded temperature information.
7. The self-checking outage protection circuit for a dormitory-floor power distribution box according to claim 1, wherein: the temperature measuring circuit (4) comprises a second power supply, the power supply is connected with a seventh resistor R7, the other end of the seventh resistor R7 is connected with the anode of an eighth diode VD8, the cathode of the eighth diode VD8 is connected with the anode of a ninth diode VD9, and the cathode of the ninth diode VD9 is grounded.
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221263365U true CN221263365U (en) | 2024-07-02 |
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| Date | Code | Title | Description |
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| GR01 | Patent grant |