CN212847047U - Passive line type fire detector - Google Patents
Passive line type fire detector Download PDFInfo
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- CN212847047U CN212847047U CN202020917088.4U CN202020917088U CN212847047U CN 212847047 U CN212847047 U CN 212847047U CN 202020917088 U CN202020917088 U CN 202020917088U CN 212847047 U CN212847047 U CN 212847047U
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Abstract
A passive line type fire detector mainly comprises a radio receiving unit and a radio transmitting unit, and is characterized in that: the radio receiving unit consists of a radio receiving device and a fire alarm controller through a fire bus; the radio transmitting unit is formed by connecting a non-metal thermocouple temperature sensing cable with a radio transmitting device. When the temperature sensing cable of the non-metallic thermocouple is heated, voltage and current are generated to drive a radio transmitting device connected with the temperature sensing cable of the non-metallic thermocouple, a radio passive fire alarm signal is transmitted, and the radio passive fire alarm signal is received by a radio receiving device and is sent to a fire alarm controller.
Description
Technical Field
The utility model relates to a passive line type fire detector is a temperature sensing cable who utilizes non-metallic thermocouple principle, and the temperature sensing produces voltage, current drive radio transmitting device after being heated, sends passive temperature sensing fire alarm signal through radio receiving arrangement to fire alarm controller, applicable use under the higher flammable and explosive environment of requirement.
Technical Field
In the prior art of a line type fire detector, as shown in fig. 1: the temperature sensing device is characterized in that a microcomputer processor 14 is connected with a temperature sensing cable 15, the tail end of the temperature sensing cable 15 is connected with a terminal resistor R to form a loop, the microcomputer processor 14 is connected with an alarm controller 11 through a fire fighting bus 12, and meanwhile, the microcomputer processor 14 is connected with a power supply through a power line 13. The microcomputer processor applies a certain voltage to the temperature sensing cable terminal resistor through external power supply so as to monitor the environment temperature and the working state of the temperature sensing cable. When the environmental temperature changes, the temperature sensing cable transmits signals to the microcomputer processor through the resistance value change so as to generate alarm signals. In the implementation of the temperature monitoring of the protection area, the existing linear temperature-sensing fire detection alarm system comprises: the alarm controller 11, the microcomputer processor 14, the temperature sensing cable 15 and the terminal resistor R are always operated in an integrated charged state, and the defects are that a charged loop is formed among the microcomputer processor, the temperature sensing cable, the terminal open circuit detection resistor and the alarm unit, so that the potential safety hazard of electrical equipment faults exists, and safety accidents of high-risk flammable and explosive places such as hydrogen, gas and gas are easily caused. A detection unit section: the microcomputer processor, the temperature sensing cable and the terminal open circuit detection resistor are generally used for detecting fire of a transformer and a high-voltage cable bridge, when the transformer leaks electricity and the high-voltage cable generates short circuit and electricity leakage, high-voltage current can damage and puncture the temperature sensing cable, once the high-voltage current is connected into the temperature sensing cable and the fire alarm system in series, the whole fire alarm system is damaged, the safety of monitoring personnel is endangered, and the economic loss is serious, so that the passive linear fire detector alarm method capable of overcoming the defects is needed.
Disclosure of Invention
The utility model provides a passive line type fire detector mainly comprises radio receiving element and radio transmitting unit, its characterized in that: the radio receiving unit is formed by connecting a radio receiving device with a fire alarm controller through a fire protection bus, and the radio transmitting unit is formed by connecting a nonmetal thermocouple temperature sensing cable with a radio transmitting device.
Nonmetal thermocouple temperature sensing cable be based on nonmetal thermocouple principle's temperature sensing cable, produce the radio transmitting device that voltage, current drive are connected with it after nonmetal thermocouple temperature sensing cable is heated, the passive fire alarm signal of transmission radio receives and sends fire alarm signal to fire alarm controller through radio receiving arrangement.
Compared with the prior art, the utility model has the advantages that: the fire detection unit is physically isolated from the fire alarm unit. One radio receiving device can simultaneously receive signals of a plurality of fire detection units, can be safely applied to high-voltage equipment, cable bridges, high-risk flammable and explosive places and the like, and eliminates potential safety hazards.
Drawings
FIG. 1 is a schematic diagram of a prior art linear temperature-sensitive fire detector system;
fig. 2 is a schematic view of a passive line type fire detector according to the present invention.
Detailed Description
The utility model discloses a passive line type fire detector, as shown in fig. 2, include: a radio receiving unit 6 and a radio transmitting unit 7, characterized in that: the radio receiving unit 6 is formed by connecting a radio receiving device 3 with a fire alarm controller 5 through a fire bus 4; the radio transmitting unit 7 is formed by connecting a non-metal thermocouple temperature sensing cable 1 with a radio transmitting device 2.
The utility model discloses well non-metal thermocouple temperature-sensing cable 1 comprises two different metal materials, sets up negative temperature coefficient separation material layer or graphite material separation material layer between two different metal materials, the parallel or setting of transposition of two different metal materials to the outermost has the protection of oversheath layer. When the temperature-sensing cable 1 of the non-metallic thermocouple is heated, thermoelectromotive force is generated, the electromotive force can be increased along with the temperature rise along with the rise of the environmental temperature, and the voltage and the current generated by the electromotive force are used for driving the radio transmitting device 2 connected with the radio transmitting device; according to the voltage and current generated by the non-metal thermocouple temperature sensing cable 1, the radio transmitting device 2 judges the corresponding set temperature, and sends out a fire alarm signal to the radio receiving device 3, and after receiving the fire alarm signal, the radio receiving device 3 sends out the fire alarm signal to the fire alarm controller 5 through the bus 4.
Radio receiving arrangement 3 can receive a plurality of radio transmitting device 2's signal simultaneously to there is fixed code address respectively, in order to distinguish each detection area position. The radio transmission device 2 may have a wireless charging reception function, and the radio reception device 3 may have a wireless charging transmission function. Through wireless charging conversion, the nonmetal thermocouple temperature-sensing cable 1 can adopt a common linear temperature-sensing fire detector.
Claims (3)
1. A passive line type fire detector mainly comprises a radio receiving unit (6) and a radio transmitting unit (7), and is characterized in that: the radio receiving unit (6) is composed of a radio receiving device (3) and a fire alarm controller (5) through a fire bus (4); the radio transmitting unit (7) is formed by connecting a non-metal thermocouple temperature sensing cable (1) with a radio transmitting device (2).
2. A passive fire line detector according to claim 1, wherein: one radio receiving device (3) can simultaneously receive signals of a plurality of radio transmitting devices (2).
3. A passive fire line detector according to claim 1, wherein: through wireless charging conversion of the radio receiving device (3) and the radio transmitting device (2), the nonmetal thermocouple temperature sensing cable (1) adopts a common linear temperature sensing cable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020917088.4U CN212847047U (en) | 2020-05-21 | 2020-05-21 | Passive line type fire detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020917088.4U CN212847047U (en) | 2020-05-21 | 2020-05-21 | Passive line type fire detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212847047U true CN212847047U (en) | 2021-03-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020917088.4U Active CN212847047U (en) | 2020-05-21 | 2020-05-21 | Passive line type fire detector |
Country Status (1)
| Country | Link |
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| CN (1) | CN212847047U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113096345A (en) * | 2020-05-21 | 2021-07-09 | 沈阳普泰安科技有限公司 | Alarm method of passive linear fire detector |
-
2020
- 2020-05-21 CN CN202020917088.4U patent/CN212847047U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113096345A (en) * | 2020-05-21 | 2021-07-09 | 沈阳普泰安科技有限公司 | Alarm method of passive linear fire detector |
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