CN210606009U - Extremely early electric power fire alarm system - Google Patents
Extremely early electric power fire alarm system Download PDFInfo
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- CN210606009U CN210606009U CN201922225408.XU CN201922225408U CN210606009U CN 210606009 U CN210606009 U CN 210606009U CN 201922225408 U CN201922225408 U CN 201922225408U CN 210606009 U CN210606009 U CN 210606009U
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Abstract
The utility model discloses an extremely early electric power fire alarm system, the untimely problem of early warning has been solved, temperature output inlet temperature detected signal of gaseous temperature in the electrical equipment casing is got into in the detection of inlet temperature detection device, the temperature output outlet temperature detected signal that temperature detection device detected the electrical equipment casing gas of giving vent to anger, ten grades of voltage comparison device comparison inlet temperature detected signal and temperature reference level signal's size is with output temperature reference signal, calorific capacity comparison device comparison exhaust temperature signal and temperature reference signal's size, and export the signal of warning when exhaust temperature signal is greater than temperature reference signal, switch circuit and calorific capacity comparison device electric connection, switch on when receiving the signal of warning and warn in order to warn the device power supply. Before a fire disaster happens, the fire disaster can be judged and warned in advance according to the heat productivity, advanced treatment is facilitated, and the fire disaster is reduced.
Description
Technical Field
The utility model relates to a fire control, more specifically say, it relates to an extremely early electric power fire alarm system.
Background
Along with the rapid development of national social and economic, the population density of cities and towns is rapidly increased, the rapid development of the industries such as real estate super high-rise buildings, cultural entertainment, markets, hotels and diets is driven, meanwhile, electrical fires frequently occur, the major losses of the lives and properties of the nation and people are caused, the residual current value and the key point temperature value of the distribution line are collected in real time, the electric arc on the line is monitored in real time, and the method is an information construction foundation for preventing and monitoring the electrical fires.
The electric fire monitoring system is a system which can send out alarm signals and control signals and can indicate alarm positions when detected parameters in a protected line exceed alarm set values. Different from the traditional automatic fire alarm system, the electric fire monitoring system can perform early warning before the fire happens, so that the actual loss is avoided, and the traditional automatic fire alarm system performs early warning after the fire happens.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a not enough to prior art exists, the utility model aims to provide a very early electric power fire alarm system of early warning before the conflagration takes place.
In order to achieve the above purpose, the utility model provides a following technical scheme:
an extremely early electric fire alarm system comprises an air inlet temperature detection device and an air outlet temperature detection device which are arranged in an electrical equipment shell, wherein the air inlet temperature detection device is used for detecting the temperature of gas entering the electrical equipment shell and outputting a corresponding air inlet temperature detection signal, the air outlet temperature detection device is used for detecting the temperature of gas discharged from the electrical equipment shell and outputting a corresponding air outlet temperature detection signal, the air inlet temperature detection device is electrically connected with a ten-stage voltage comparison device, the ten-stage voltage comparison device compares the sizes of the air inlet temperature detection signal and a temperature reference grade signal to output a temperature reference signal, the air outlet temperature detection device and the ten-stage voltage comparison device are simultaneously electrically connected with a heat productivity comparison device, and the heat productivity comparison device compares the sizes of an exhaust temperature signal and the temperature reference signal, and output signal of warning when exhaust temperature signal is greater than temperature reference signal, switch circuit and calorific capacity comparator electric connection switch on when receiving signal of warning in order to warn the device power supply of warning.
By adopting the technical scheme, the shell of the electrical equipment is provided with the air inlet temperature detection device and the air outlet temperature detection device, the air inlet temperature detection device detects the temperature of air entering the shell, then the ten-stage voltage comparison device compares the temperature with the temperature reference grade, divides the temperature according to the grade and outputs the corresponding temperature reference signal, and the temperature reference signal is used for comparing the heat productivity comparison device and judging whether the heat productivity is excessive, namely the air inlet temperature is low, the temperature reference signal is low, the air inlet temperature is high, and the temperature reference signal is high, so that the fire monitoring judgment is more scientific, reasonable and accurate. When the exhaust temperature detection signal is greater than the temperature reference signal, the representative calorific value is too high, the calorific value comparison device outputs a warning signal at the moment, and the switch circuit responds to the warning signal and is switched on to supply power to the warning device for warning. The principle is that the air inlet temperature is detected, the highest allowable heat productivity and the highest temperature of air outlet are further determined, and whether the air outlet temperature is higher than the allowable heat productivity temperature or not is compared, so that the fire disaster can be judged and warned in advance according to the heat productivity before the fire disaster happens, the advance treatment is facilitated, and the fire disaster is reduced.
Further, the intake air temperature detection device includes a temperature sensor and an amplification circuit.
By adopting the technical scheme, the amplifying circuit amplifies the temperature detection signal and enhances the detection precision.
Further, the ten-stage voltage comparison device comprises a grade circuit for providing a temperature reference grade signal and a reference circuit for adjusting the temperature reference grade.
By adopting the technical scheme, the reference circuit supports adjustment of the size of the temperature reference grade, so that the supported intake air temperature range is wide, and more temperature service condition monitoring is supported.
Further, the heating value comparison device is a voltage comparator circuit.
Further, the switch circuit is a triode switch circuit.
Further, the warning device is a buzzer.
Compared with the prior art, the utility model has the advantages that: before a fire disaster happens, the fire disaster can be judged and warned in advance according to the heat productivity, advanced treatment is facilitated, and the fire disaster is reduced.
Drawings
FIG. 1 is a schematic diagram of the electric fire alarm system for the middle and early stages of the present invention;
fig. 2 is a schematic circuit diagram of a middle ten-stage voltage comparison device according to the present invention;
fig. 3 is a schematic circuit diagram of the calorific value comparison device according to the present invention.
Reference numeral 1, an intake air temperature detection device; 2. a ten-stage voltage comparison device; 21. a gradation circuit; 22. a reference circuit; 3. an outlet air temperature detection device; 4. a calorific value comparing device; 5. a switching circuit; 6. an alarm device.
Detailed Description
Examples
An extremely early electric fire alarm system, referring to fig. 1, includes an inlet air temperature detection device 1 and an outlet air temperature detection device 3 arranged in an electrical equipment housing, which is a non-sealed housing of power transmission and distribution equipment.
The air inlet temperature detection device 1 is arranged at an air inlet of the shell and used for detecting the temperature of air entering the shell of the electrical equipment and outputting a corresponding air inlet temperature detection signal, and the air outlet temperature detection device 3 is arranged at an air outlet of the shell and used for detecting the temperature of the air in the shell of the electrical equipment and outputting a corresponding air outlet temperature detection signal. The intake air temperature detection device 1 includes a temperature sensor and an amplification circuit.
Referring to fig. 1 and 2, the intake air temperature detecting device 1 is electrically connected to a ten-stage voltage comparing device 2, the ten-stage voltage comparing device 2 compares the intake air temperature detection signal with the temperature reference level signal to output a temperature reference signal, and includes a chip IC-3, wherein the chip IC-3 is an LM3914, and a pin 5 of the LM3914 is connected to the intake air temperature detecting device 1 to receive the intake air temperature detection signal. The pins 2 and 4 of the LM3914 are grounded, the pins 3 and 9 of the LM3914 are connected to a power supply, meanwhile, the pin 3 of the LM3914 is connected to the anode of an electrolytic capacitor C7, the cathode of an electrolytic capacitor C7 is connected with the pin 4 of the LM3914, the pins 6 and 7 of the LM3914 are connected with a potentiometer RP in series and then grounded, the pin 8 of the LM3914 is connected with a resistor R9 in series and then connected with the pin 7 of the LM3914, and the potentiometer RP and the resistor R9 form a reference circuit 22 for adjusting the temperature reference grade size.
The 1 pin, 18 pin, 17 pin, 16 pin and 15 pin of the LM3914 are respectively connected in series with a resistor R1, a resistor R2, a resistor R3, a resistor R4 and a resistor R5, and then connected to the power VCC, and the resistor R1, the resistor R2, the resistor R3, the resistor R4 and the resistor R5 form a level circuit 21 for providing a temperature reference level signal.
The specific comparison principle of the ten-stage voltage comparison device 2 is as follows: when the intake air temperature detection signal indicates 22, it is compared with the temperature reference level signal, for example, if the temperature level signal is 15, 20, 25, and 22 is located between 20 and 25, then the pin corresponding to the temperature among pin 1, pin 18, pin 17, pin 16, and pin 15 is turned on, and since the resistance values of the respective resistors are different, the pin has the voltage corresponding to the level, and is output as the temperature reference signal.
Referring to fig. 1 and 3, the outlet temperature detection device 3 and the ten-stage voltage comparison device 2 are electrically connected to the calorific value comparison device 4, and the calorific value comparison device 4 compares the exhaust temperature signal with the temperature reference signal and outputs an alarm signal when the exhaust temperature signal is greater than the temperature reference signal. The calorific value comparing device 4 is a voltage comparator circuit, and the chip U2 is LM 339. The switch circuit 5 is electrically connected with the heating value comparison device 4 and is conducted to supply power to the warning device 6 for warning when receiving the warning signal. In this embodiment, the switch circuit 5 is a triode switch circuit, and the warning device 6 is a buzzer.
This embodiment is through monitoring respectively the temperature of admitting air and the temperature of giving vent to anger, and the concrete principle is for detecting the temperature of admitting air, and then confirms the highest temperature of the most highly allowable calorific capacity and giving vent to anger, and through giving vent to anger the temperature and whether being higher than the calorific capacity temperature of allowwing and the temperature of giving vent to anger relatively, and then relatively obtain whether calorific capacity is normal, realizes that the conflagration carries out the early warning in advance.
It is above only the utility model discloses a preferred embodiment, the utility model discloses a scope of protection does not only confine above-mentioned embodiment, the all belongs to the utility model discloses a technical scheme under the thinking all belongs to the utility model discloses a scope of protection. It should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (6)
1. An extremely early electric power fire alarm system is characterized in that: the gas inlet temperature detection device is used for detecting the temperature of gas entering the electrical equipment shell and outputting corresponding gas inlet temperature detection signals, the gas outlet temperature detection device is used for detecting the temperature of gas discharged from the electrical equipment shell and outputting corresponding gas outlet temperature detection signals, the gas inlet temperature detection device is electrically connected with a ten-stage voltage comparison device, the ten-stage voltage comparison device compares the gas inlet temperature detection signals with the temperature reference grade signals to output temperature reference signals, the gas outlet temperature detection device and the ten-stage voltage comparison device are simultaneously electrically connected with a heat productivity comparison device, the heat productivity comparison device compares the sizes of the gas outlet temperature signals with the temperature reference signals and outputs warning signals when the gas outlet temperature signals are greater than the temperature reference signals, the switch circuit is electrically connected with the heating value comparison device and is conducted to supply power to the warning device for warning when receiving the warning signal.
2. An extremely early electric fire alarm system according to claim 1, wherein: the intake air temperature detection device includes a temperature sensor and an amplification circuit.
3. An extremely early electric fire alarm system according to claim 1, wherein: the ten-stage voltage comparison device comprises a grade circuit for providing a temperature reference grade signal and a reference circuit for adjusting the temperature reference grade.
4. An extremely early electric fire alarm system according to claim 1, wherein: the heating value comparison device is a voltage comparator circuit.
5. An extremely early electric fire alarm system according to claim 1, wherein: the switch circuit is a triode switch circuit.
6. An extremely early electric fire alarm system according to claim 1, wherein: the warning device is a buzzer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922225408.XU CN210606009U (en) | 2019-12-12 | 2019-12-12 | Extremely early electric power fire alarm system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922225408.XU CN210606009U (en) | 2019-12-12 | 2019-12-12 | Extremely early electric power fire alarm system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210606009U true CN210606009U (en) | 2020-05-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922225408.XU Active CN210606009U (en) | 2019-12-12 | 2019-12-12 | Extremely early electric power fire alarm system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210606009U (en) |
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2019
- 2019-12-12 CN CN201922225408.XU patent/CN210606009U/en active Active
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