CN201051024Y - Novel temperature induction cable - Google Patents
Novel temperature induction cable Download PDFInfo
- Publication number
- CN201051024Y CN201051024Y CNU2007200762725U CN200720076272U CN201051024Y CN 201051024 Y CN201051024 Y CN 201051024Y CN U2007200762725 U CNU2007200762725 U CN U2007200762725U CN 200720076272 U CN200720076272 U CN 200720076272U CN 201051024 Y CN201051024 Y CN 201051024Y
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- China
- Prior art keywords
- temperature
- temperature sensing
- sensing cable
- elastic metallic
- metallic yarn
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- Expired - Fee Related
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- Fire-Detection Mechanisms (AREA)
- Fire Alarms (AREA)
Abstract
The utility model discloses a novel temperature sensing cable, which comprises a twist temperature sensing wire (1), a negative temperature parameter heat sensitive resistor wire (2) and a protection cover outside the two wires (3), wherein the heat sensitive wire is composed of an elastic metal wire (12) and a heat sensitive materials layer (13) outside the elastic metal wire, the negative temperature parameter heat sensitive resistor wire is composed of elastic metal wires (22) and the negative temperature parameter heat sensitive resistor materials (23) outside the elastic metal wire. The temperature sensing cable can be used for a fire sensing detector, the temperature sensing cable and the fire sensing detector has little impact from environment temperature, has high precision, and no wrong reports.
Description
Technical field
The utility model relates to fire fighting equipment, is specifically related to a kind of temperature sensing cable.
Background technology
Cable tunnel, large-sized cable chamber, Hydraulic Station, oil depot, petroleum storage tank, electrical distribution system, warehouse, chemicals storage and production plant and hangar etc. are located fire-fighting strict, need fire alarm detecting devices very reliably.Temperature sensing fire alarm commonly used, the general using temperature sensing cable is as the source of signals collecting.
Coaxial temperature sensing cable is the temperature sensing cable of using always, is generally wrapped up successively from inside to outside by inner wire, negative temperature coefficient (NTC) thermistor material, screen layer, oversheath and the explosion-proof braided sheath of metal material forming.In case have the condition of a fire to take place, negative temperature coefficient (NTC) thermistor material Yin Wendu raises, its resistance changes thereupon, by this variation of decoding signals perception, carries out conversion of signals, by MICROCOMPUTER PROCESSING, realizes fire alarm.
This coaxial temperature sensing cable precision on point value is higher, but length precision can variation when increasing, the easy wrong report by mistake influenced by environmental temperature, environment temperature is slightly higher sometimes, but will send alarm of fire when also being less than the fire alarm temperature.When the length of using was big, the coaxial temperature sensing cable precision of this class just may be not suitable for requirement.Therefore, need higher, the influenced by ambient temperature little temperature sensing cable of a kind of precision.
The utility model content
The utility model aims to provide a kind of little, novel temperature sensing cable that precision is high influenced by ambient temperature.
Be achieved through the following technical solutions:
A kind of novel temperature sensing cable 4, comprise strand around temperature-sensitive lead 1 and negative tempperature coefficient thermistor lead 2, and be wrapped in oversheath 3 outside these two leads;
The temperature-sensitive lead is by elastic metallic yarn and be wrapped in the outer heat-sensitive material layer of elastic metallic yarn and form; The negative tempperature coefficient thermistor lead is by elastic metallic yarn and be wrapped in the outer negative temperature coefficient heat-sensitive resistance material layer of elastic metallic yarn and form.As shown in Figure 1, 2, 3.
Elastic metallic yarn tensile strength is not less than 1000pa.
The melt temperature of heat-sensitive material layer is 40 ℃～260 ℃.
Can select thermo-sensitive material as required, when reaching melt temperature, thermo-sensitive material can melt, and then the elastic metallic yarn of parcel contacts the negative tempperature coefficient thermistor lead, and resistance value changes.But warning is sent in this variation of decoding signals perception when reaching predefined temperature parameter.
Above-mentioned novel temperature sensing cable can be applicable to line-type heat detector, and this class fire detector comprises sensing circuit, box body and be arranged on the interior decoding signals of box body that sensing circuit is by being connected with decoding signals;
Sensing circuit is made up of above-mentioned novel temperature sensing cable and termination box;
Decoding signals comprises single-chip microcomputer, parameter input circuit, alarm relay circuit and the display circuit of pre-amplification circuit, integrated A/D conversion; Wherein the prime amplifier input end is connected with temperature sensing cable, the output terminal of prime amplifier and parameter input circuit is connected to the input end of the single-chip microcomputer of integrated A/D conversion, the output terminal of the single-chip microcomputer of integrated A/D conversion is connected respectively to the input end of alarm relay circuit and display circuit, as shown in Figure 5.
The alarm relay circuit can be selected multistage alarm relay circuit for use, as level Four alarm relay circuit.
Display circuit comprises LCD display circuit and LED display circuit.
Novel temperature sensing cable provided by the utility model, and the fire detector of this temperature sensing cable of use, it is minimum disturbed by environment temperature, and reliability is very high, and the phenomenon that fire temperature is but reported by mistake can not take place not reach, and can be widely used in various environment.
Description of drawings
Fig. 1 is novel temperature sensing cable structural representation
Fig. 2 is a temperature-sensitive conductor structure synoptic diagram
Fig. 3 is a negative tempperature coefficient thermistor conductor structure synoptic diagram
Fig. 4 is linear heat fire detector structural representation
Fig. 5 is the line-type heat detector theory diagram
Fig. 6 is linear heat fire detector circuit diagram
Wherein, 1-temperature-sensitive lead, 12-elastic metallic yarn, 13-heat-sensitive material layer, 2-negative tempperature coefficient thermistor lead, 22-elastic metallic yarn, 23-negative temperature coefficient heat-sensitive resistance material layer, 3-oversheath, the novel temperature sensing cable of 4-, 5-termination box, 6-box body, 7-decoding signals
Embodiment
By elastic metallic yarn and be wrapped in the outer heat-sensitive material layer of elastic metallic yarn and form the temperature-sensitive lead, as shown in Figure 1; By elastic metallic yarn and be wrapped in the outer negative temperature coefficient heat-sensitive resistance material layer of elastic metallic yarn and form the negative tempperature coefficient thermistor lead, as shown in Figure 2.
Above-mentioned temperature-sensitive lead is become twisted-pair feeder with negative tempperature coefficient thermistor lead strand winding, and, constitute a kind of novel temperature sensing cable, as shown in Figure 3 at its coated outside one deck oversheath.
Elastic metallic yarn tensile strength is not less than 1000pa.The heat-sensitive material layer melt temperature is 40 ℃～260 ℃.Can select suitable thermo-sensitive material according to actual conditions.
Embodiment 2
A kind of line-type heat detector is made up of sensing circuit, box body 6 and the decoding signals 7 that is arranged in the box body, as shown in Figure 4.Novel temperature sensing cable among the embodiment 1 is connected with termination box 5, constitutes sensing circuit.
Decoding signals comprises single-chip microcomputer, parameter input circuit, the alarm relay circuit display circuit of pre-amplification circuit, integrated A/D conversion; Wherein the prime amplifier input end is connected with temperature sensing cable, the input end of the single-chip microcomputer of the integrated A/D conversion of the output termination of pre-amplification circuit and parameter input circuit, the output terminal of the single-chip microcomputer of integrated A/D conversion connects the input end of multistage alarm relay circuit, display circuit respectively.As shown in Figure 5.Display circuit comprises LCD display circuit and LED display circuit.
The single-chip microcomputer of above-mentioned integrated A/D conversion is selected the high performance single-chip microcomputer of MICROCHIP company for use, and its model is PIC16FC74, and inside carries A/D conversion, the FLASHROM of 4K, reduced instruction set computer.The output function of the collection of all signals, the conversion of signal, signal judgment and signal is finished by this single-chip microcomputer.
The alarm relay circuit is a level Four alarm relay circuit, promptly comprises one-level alarm relay circuit, power transfer relay circuit, secondary alarm relay circuit, three grades of alarm relay circuit.Described alarm relay circuit at different levels is by resistance, photo coupler, relay and forward diode constitute, wherein the P level of the diode in resistance and the photo-coupler is connected, diode N level ground connection, the P level of triode connects voltage in the photo-coupler, N level series relay, relay forward diode in parallel.Circuit diagram as shown in Figure 6.
Claims (3)
1. a novel temperature sensing cable (4) is characterized in that, comprise strand around temperature-sensitive lead (1) and negative tempperature coefficient thermistor lead (2), and be wrapped in oversheath (3) outside these two leads;
The temperature-sensitive lead is by elastic metallic yarn (12) and be wrapped in the outer heat-sensitive material layer (13) of elastic metallic yarn and form; The negative tempperature coefficient thermistor lead is by elastic metallic yarn (22) and be wrapped in the outer negative temperature coefficient heat-sensitive resistance material layer (23) of elastic metallic yarn and form.
2. the described a kind of novel temperature sensing cable of claim 1 is characterized in that, described heat-sensitive material layer melt temperature is 40 ℃～260 ℃.
3. the described a kind of novel temperature sensing cable of claim 1 is characterized in that described elastic metallic yarn tensile strength is not less than 1000pa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200762725U CN201051024Y (en) | 2007-11-16 | 2007-11-16 | Novel temperature induction cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200762725U CN201051024Y (en) | 2007-11-16 | 2007-11-16 | Novel temperature induction cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201051024Y true CN201051024Y (en) | 2008-04-23 |
Family
ID=39337514
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200762725U Expired - Fee Related CN201051024Y (en) | 2007-11-16 | 2007-11-16 | Novel temperature induction cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201051024Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103428922A (en) * | 2012-05-26 | 2013-12-04 | 河南科信电缆有限公司 | Carbon fiber temperature sensing ribbon-shaped cable |
| CN103644979A (en) * | 2013-12-07 | 2014-03-19 | 四川天微电子有限责任公司 | Linear type temperature sensor |
| CN103854796A (en) * | 2014-02-23 | 2014-06-11 | 安徽华海特种电缆集团有限公司 | Recoverable linetype damp-proof temperature sensing cable |
| CN113450526A (en) * | 2021-08-19 | 2021-09-28 | 沈阳沈安探测技术有限公司 | Temperature-sensing fire detector |
-
2007
- 2007-11-16 CN CNU2007200762725U patent/CN201051024Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103428922A (en) * | 2012-05-26 | 2013-12-04 | 河南科信电缆有限公司 | Carbon fiber temperature sensing ribbon-shaped cable |
| CN103644979A (en) * | 2013-12-07 | 2014-03-19 | 四川天微电子有限责任公司 | Linear type temperature sensor |
| CN103854796A (en) * | 2014-02-23 | 2014-06-11 | 安徽华海特种电缆集团有限公司 | Recoverable linetype damp-proof temperature sensing cable |
| CN113450526A (en) * | 2021-08-19 | 2021-09-28 | 沈阳沈安探测技术有限公司 | Temperature-sensing fire detector |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080423 Termination date: 20111116 |