CN201465254U - Temperature-sensing cable - Google Patents
Temperature-sensing cable Download PDFInfo
- Publication number
- CN201465254U CN201465254U CN2009200752722U CN200920075272U CN201465254U CN 201465254 U CN201465254 U CN 201465254U CN 2009200752722 U CN2009200752722 U CN 2009200752722U CN 200920075272 U CN200920075272 U CN 200920075272U CN 201465254 U CN201465254 U CN 201465254U
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- sensitive
- temperature
- heat
- metal film
- sensing cable
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Abstract
The utility model discloses a temperature-sensing cable which comprises a wound NTC (negative temperature coefficient) heat-sensitive lead wire (20) and a fusing heat-sensitive lead wire (10). The fusing heat-sensitive lead wire is composed of a metal lead wire (11) and a fusing heat-sensitive insulating material layer (12) wrapped outside the metal lead wire (11). The NTC heat-sensitive lead wire comprises a metal lead wire (21) and an NTC heat-sensitive material layer (22) wrapped outside the metal lead wire (21), one or more metal film layers (23) which are connected in series are wrapped outside the NTC heat-sensitive material layer, the length of the metal film layers is within 0.1 to 5m, and the clearances among the metal film layers are within 1 to 100mm. The metal films which are good conductors are wrapped outside the NTC heat-sensitive material layer; therefore, when the contact surface between the fusing heat-sensitive material layer and the NTC heat-sensitive material is increased and reaches the alarm temperature point, the reaction time is shortened and the sensitivity is improved.
Description
Technical field
The utility model relates to the fire fighting equipment field, is specifically related to a kind of temperature sensing cable.
Background technology
Temperature sensing cable generally is negative temperature coefficient heat-sensitive (NTC) material that superposes between two leads, and along with temperature raises, its resistance can diminish, and therefore has the function that temperature-sensitive is reported to the police.Though this type of temperature sensing cable can recover, its accuracy and reliability are subjected to environment temperature and use the influence of length.
Chinese patent 200520113373.6 has been announced a kind of fusible analog linear temperature-sensing detector that maybe can melt insulation course that has, between two stranded detecting conductors, be provided with the material layer (being the negative temperature coefficient thermistor composition layer) and the fusible insulation course of NTC characteristic, select fusible insulating layer material according to alarm temperature
The temperature sensing cable of this structure, though can play recoverable function, and overcome the influence that is subjected to environment temperature and uses length; But because of between negative temperature coefficient thermistor composition and melting temperature-sensitive insulating material for line style contacts, its reliability is relatively poor; Need be wrapped in when reaching alarm temperature point simultaneously and contact with the NTC thermo-sensitive material after melting temperature-sensitive insulating material on the lead needs to melt (thawing) earlier again, so that the linear temperature sensitive cable of this structure reacts is slower, the response time is bigger.
Therefore, need make improvement, to overcome above-mentioned defective to prior art.
The utility model content
The utility model aims to provide a kind of temperature sensing cable, can improve reliability, shorten the reaction time.
Technical scheme is: a kind of temperature sensing cable, its structure comprise strand around negative temperature coefficient heat-sensitive lead and melting temperature-sensitive lead; Can melt the temperature-sensitive lead is made up of plain conductor and the melting temperature-sensitive insulation material layer that is wrapped in the plain conductor outside; The negative temperature coefficient heat-sensitive lead comprises plain conductor and is wrapped in the negative temperature coefficient thermistor composition layer of plain conductor outside, metal film layer in one or more snippets series connection of negative temperature coefficient thermistor composition layer outer wrapping, the length of each section metal film layer is 0.1m～5m, be preferably 0.5m～2m, gap between each section metal film layer is 1mm～100mm, is preferably 1mm～10mm.
Metallic film can adopt aluminium film, copper film or aluminium copper film.
The melt temperature of melting heat-sensitive material layer is 40 ℃～260 ℃, is preferably 40 ℃～120 ℃.
The tensile strength of plain conductor is not less than 1000pa.
The strand around negative temperature coefficient heat-sensitive lead and melting temperature-sensitive lead outer wrapping oversheath.
This temperature sensing cable, because negative temperature coefficient thermistor composition layer coated outside metallic film, metallic film is a good conductor, therefore the surface of contact between melting heat-sensitive material layer and the negative temperature coefficient thermistor composition increases, when arriving alarm temperature point, the reaction time shortens, and sensitivity improves.
Gapped between the metal film layer, can reduce the influence that causes because of temperature sensing cable length.
Temperature sensing cable of the present utility model, good reliability is subjected to environment temperature and uses the influence of length little, and accelerated the reaction of temperature sensing cable, has shortened the response time, improves sensitivity, can be used for the temperature sensing fire alarm.After local melting thermo-sensitive material melted, the melting thermo-sensitive material did not mix with the negative temperature coefficient heat-sensitive resistance material layer, so temperature sensing cable still can continue use, and is cost-saved, do not influence its precision.
Description of drawings
Fig. 1 is the structural representation of the utility model temperature sensing cable.
Fig. 2 is the cross-sectional view of negative temperature coefficient heat-sensitive lead and melting temperature-sensitive lead
Fig. 3 is the structural representation of melting temperature-sensitive lead.
Fig. 4 is the structural representation of negative temperature coefficient heat-sensitive lead.
10-melting temperature-sensitive lead, 11-plain conductor, 12-melting temperature-sensitive insulation material layer, 20-negative temperature coefficient heat-sensitive lead, 21-plain conductor, 22-negative temperature coefficient thermistor composition layer, 23-metal film layer, the gap between the 24-metal film layer, 30-oversheath
Embodiment
Embodiment 1
Shown in Fig. 1～4, a kind of temperature sensing cable, by strand around melting temperature-sensitive lead 10 and negative temperature coefficient heat-sensitive lead 20, and be wrapped in the outer oversheath of these two kinds of leads 30 and form.
Can melt temperature-sensitive lead 10 is made up of plain conductor 11 and the melting temperature-sensitive insulation material layer 12 that is wrapped in the plain conductor outside.
Negative temperature coefficient heat-sensitive lead 20 comprises plain conductor 21 and is wrapped in the negative temperature coefficient thermistor composition layer 22 of plain conductor outside, metal film layer 23 in the series connection of negative temperature coefficient thermistor composition layer outer wrapping multistage, the length of every section metal film layer is 1m, and the gap 24 between each section metal film layer is 5mm.
The tensile strength of selected plain conductor 11,21 is not less than 1000pa; The melt temperature of melting heat-sensitive material layer is 40 ℃～260 ℃, can select the melting thermo-sensitive material according to actual conditions; The material of metal film layer is an aluminium.
When temperature reaches the melt temperature of melting heat-sensitive material layer, because negative temperature coefficient thermistor composition layer coated outside metal film layer, metal film layer is a good conductor, therefore the surface of contact between melting heat-sensitive material layer and the negative temperature coefficient thermistor composition is bigger, make temperature sensing cable sensitivity better, reaction is accelerated, and has shortened the response time.
Embodiment 2
The material of metal film layer is a copper, and the length of every section metal film layer is 2m, and the gap between each section metal film layer is 1mm, and all the other are with embodiment 1.
Claims (6)
1. temperature sensing cable, comprise strand around negative temperature coefficient heat-sensitive lead (20) and melting temperature-sensitive lead (10); Can melt temperature-sensitive lead (10) is made up of plain conductor (11) and the melting temperature-sensitive insulation material layer (12) that is wrapped in plain conductor (11) outside;
It is characterized in that, described negative temperature coefficient heat-sensitive lead (20) comprises plain conductor (21) and is wrapped in the negative temperature coefficient thermistor composition layer (22) of plain conductor outside, metal film layer (23) in negative temperature coefficient thermistor composition layer (22) one or more snippets series connection of outer wrapping, the length of each section metal film layer (23) is 0.1m～5m, and the gap between each section metal film layer is 1mm～100mm.
2. the described a kind of temperature sensing cable of claim 1 is characterized in that, the length of described metal film layer is 0.5m～2m, and the gap between each metal film layer is 1mm～10mm.
3. the described a kind of temperature sensing cable of claim 1 is characterized in that, the material of described metal film layer (23) is copper, aluminium or X alloy.
4. the described a kind of temperature sensing cable of claim 1 is characterized in that, the tensile strength of described plain conductor (11,21) is not less than 1000pa.
5. the described a kind of temperature sensing cable of claim 1 is characterized in that, the melt temperature of described melting temperature-sensitive insulation material layer (12) is 40 ℃～260 ℃.
6. the described a kind of temperature sensing cable of claim 1 is characterized in that, the strand around negative temperature coefficient heat-sensitive lead (20) and melting temperature-sensitive lead (10) outer wrapping oversheath (30).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200752722U CN201465254U (en) | 2009-07-24 | 2009-07-24 | Temperature-sensing cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200752722U CN201465254U (en) | 2009-07-24 | 2009-07-24 | Temperature-sensing cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201465254U true CN201465254U (en) | 2010-05-12 |
Family
ID=42392602
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009200752722U Expired - Fee Related CN201465254U (en) | 2009-07-24 | 2009-07-24 | Temperature-sensing cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201465254U (en) |
-
2009
- 2009-07-24 CN CN2009200752722U patent/CN201465254U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100512 Termination date: 20140724 |
|
| EXPY | Termination of patent right or utility model |