Irrecoverable type line-type heat detector of broken circuit warning
A fire detector and open circuit alarm technology, applied in fire rescue and other directions, can solve problems such as short circuit detection of conductors, false alarms, etc., to achieve good transmission performance and reduce false alarms.
Inactive Publication Date: 2012-08-29
SURELAND IND FIRE SAFETY
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Problems solved by technology
The disadvantage is that the elastic conductor or memory alloy wire in this kind of temperature detector is prone to short circuit between the detection conductors no matter under normal conditions or in the environment of alarm temperature, or under the action of mechanical external force during installation and use. causing false fire alarms
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[0021] see image 3 , Figure 4 , the linear temperature-sensing fire detector of the present invention belongs to a kind of non-recoverable linear temperature-sensing fire detector of open circuit alarm, comprising two detection conductors, an insulating layer 5, and a conversion box 8, and the two detection conductors 6, 7 are arranged in parallel, one of the detection conductors is a fusible conductor, the insulating layer is arranged between two detection conductors, and the first ends of the two detection conductors are respectively electrically connected to the input end of the conversion box , a resistor 4 is connected in series between the two detection conductors, the resistor is connected in series at the tail ends of the two detection conductors (connected according to conventional connection standards), the resistance value of the resistor is 0~20MΩ, and the optimum value is 1KΩ Between ~1MΩ, (when the resistance value is 0, the resistor can be canceled). In this...
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The present inventionpresent present invention relates to an unrecoverable wire temperature-sensing fire detector for open-circuit alarming, and comprises two detecting conductors, an insulating layer and a conversion box. The two detecting conductors are arranged in parallel, and at least one of the two conductors is an easily-melted conductor. The insulating layer is arranged between the two conductors. Head ends of the conductors are connected with an input end of the conversion box respectively. A resistor is connected in series between the two conductors and is connected to tail ends of the conductors respectively. The melting temperature scope of the easily-melted conductor is 45 to 280 centigrade degrees. When the temperature at the fire site is beyond the scope, a detecting cable is disconnected under the action of the cable tension, so the present invention is provided with the function of normal fire alarming. Combined with the detecting cable with the short-circuit alarmingfunction based on the prior art, the present inventionpresent present invention reduce the alarming mistakes by a wire temperature-sensing fire detector under the normal temperature, promote the reliability of the wire temperature-sensing fire detector and increase the function of fault alarming for the wire temperature-sensing fire detector.
Description
technical field [0001] The invention relates to a non-recoverable linear temperature-sensing fire detector with an open circuit alarm. At least one detection conductor in the linear temperature-sensitive fire detector adopts a fusible conductor, and uses the principle of "open circuit" to report fire or assist fire alarm. Background technique [0002] The traditional non-recoverable linear temperature-sensitive fire detector currently used is a fire detector with a wide range of uses. figure 1 and attached figure 2 It shows the structural schematic diagram of the existing non-recoverable linear heat-sensitive fire detector, in which there is an outer sheath 1, and two (or three, four) elastic conductors 3 are twisted inside the sheath Together, the outside of the detection conductor is covered with a meltable material 2 with a certain melting point. When the detection cable is heated, it can be melted and softened or melted after the temperature reaches a certain level. U...
Claims
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IPC IPC(8): A62C37/44A62C37/48
Inventor 张卫社李刚进
Owner SURELAND IND FIRE SAFETY