CN201017432Y - Linetype temperature-sensing fire disaster detector - Google Patents
Linetype temperature-sensing fire disaster detector Download PDFInfo
- Publication number
- CN201017432Y CN201017432Y CNU2007200955018U CN200720095501U CN201017432Y CN 201017432 Y CN201017432 Y CN 201017432Y CN U2007200955018 U CNU2007200955018 U CN U2007200955018U CN 200720095501 U CN200720095501 U CN 200720095501U CN 201017432 Y CN201017432 Y CN 201017432Y
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- Prior art keywords
- temperature sensor
- linear temperature
- sensor element
- ntc characteristic
- type heat
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- 150000003839 salts Chemical class 0.000 claims abstract description 45
- 239000004020 conductor Substances 0.000 claims abstract description 41
- 239000000463 material Substances 0.000 claims abstract description 28
- 230000004888 barrier function Effects 0.000 claims description 29
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 4
- 238000005192 partition Methods 0.000 abstract 3
- 238000006243 chemical reaction Methods 0.000 abstract 1
- 230000008018 melting Effects 0.000 abstract 1
- 238000002844 melting Methods 0.000 abstract 1
- 230000004927 fusion Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 1
- 235000017491 Bambusa tulda Nutrition 0.000 description 1
- 241001330002 Bambuseae Species 0.000 description 1
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 1
- HSFWRNGVRCDJHI-UHFFFAOYSA-N alpha-acetylene Natural products C#C HSFWRNGVRCDJHI-UHFFFAOYSA-N 0.000 description 1
- 239000005030 aluminium foil Substances 0.000 description 1
- 239000011425 bamboo Substances 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005496 eutectics Effects 0.000 description 1
- 238000009422 external insulation Methods 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 230000035772 mutation Effects 0.000 description 1
- 239000013308 plastic optical fiber Substances 0.000 description 1
- 229920001197 polyacetylene Polymers 0.000 description 1
- 229920000767 polyaniline Polymers 0.000 description 1
- 229920000123 polythiophene Polymers 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Images
Abstract
The utility model discloses a linear thermometric fire detector, which is composed of a linear temperature sensor element and a conversion box linked to one end of the linear temperature sensor element. Wherein, the linear temperature sensor element comprises two parallel-arranged detecting conductors, a meltable salt material layer that is arranged in parallel between the detecting conductors, and a NTC characteristic partition layer. In case of a fire hazard, the temperature of a heated area on the linear temperature sensor element will exceed the melting temperature of meltable salt, so that conductive performances of the meltable salt change; then, value of electrical parameters of the linear temperature sensor element will mainly be determined via the resistance of the NTC characteristic partition layer inside the heated regional segment, but influences from other regional segments are rather limited. Therefore, the application length of the linear temperature sensor element can be increased. However, if the linear temperature sensor element is arranged in wet environments, once external water enters, the meltable salt inside will be melted; but no NTC characteristic partition layer is arranged between the detecting conductors, no false alarm will be resulted in.
Description
Technical field
The utility model relates to a kind of line-type heat detector, particularly relate to a kind of can be waterproof and dampproof, and can prolong the line-type heat detector that uses length.
Background technology
Line-type heat detector commonly used at present is a kind of broad-spectrum fire detector, mainly by linear temperature sensor and be connected an end of linear temperature sensor, can be in real time the temperature or the warning electrical quantity (or sampled value) of linear temperature sensor be detected, and form according to the boxcar that the size of temperature or warning electrical quantity (or sampled value) is sent fire alarm signal.United States Patent (USP) the 5th, 793 discloses a kind of line-type heat detector in No. 293.Fig. 1 is a linear temperature sensor transverse sectional view in this line-type heat detector.As shown in Figure 1, this linear temperature sensor is to be reached to walk abreast by two parallel detecting conductors that are provided with 1,2 to be arranged on detecting conductor 1, but the fused salt between 2 (eutectic salts) material layer 3 is formed; Wherein fusible salt material layer 3 is but that glass fibre or plastic optical fibre are immersed in the fused salt of fusing, but the fiber that will soak fused salt then twines or is wrapped in the outside of detecting conductor and makes.But the fusing point of fused salt is 60～300 ℃, and after the fusing, its electric conductivity strengthens, and promptly resistance reduces, and after solidifying, its electric conductivity reduces, and promptly resistance increases.When breaking out of fire, the linear temperature sensor that is positioned at the scene of fire in this detector will raise because of the temperature of being heated, but fused salt states of matter in the fusible salt material layer 3 of inside, heated part or electric conductivity will be subjected to the influence of temperature rising and change at this moment, thereby the electrical quantity of linear temperature sensor is also changed thereupon, at this moment, the boxcar that is connected linear temperature sensor one end will detect this variation immediately, in case but the temperature of this heated part surpasses the temperature of fusion of fused salt, boxcar sends fire alarm signal immediately, thereby reaches the purpose of fire alarm.But, there is following point in the line-type heat detector of this prior art: but owing to the fused salt chance water of linear temperature sensor inside in this detector can produce dissolving, thereby it is very responsive to wet environment, therefore, in case its fully or the part be in the wet environment, outside moisture will penetrate into the fusible salt material layer 3 of linear temperature sensor inside, thereby its electric conductivity is increased, the boxcar that be connected linear temperature sensor one end this moment just can detect this variation immediately, therefore might cause occurring false alarm.
Linear temperature sensor in the another kind of commonly used line-type heat detector is by two parallel detecting conductors that are provided with and parallelly be arranged on two NTC characteristic barrier layers between the detecting conductor and form.When breaking out of fire, the electrical quantity of the NTC characteristic barrier layer of inside, heated part will be subjected to this Temperature Influence and change on the linear temperature sensor, thereby the electrical quantity of linear temperature sensor is also changed thereupon, at this moment, the boxcar that is connected linear temperature sensor one end will detect this variation immediately, and send fire alarm signal, thereby reach the purpose of fire alarm according to the electrical quantity size of linear temperature sensor.Though moist environment is little to the influence of this line-type heat detector, because the NTC characteristic barrier layer of linear temperature sensor inside is very responsive to temperature, so environment temperature is very big to its influence; In addition, along with the increase of using length, the resistance of NTC characteristic barrier layer can reduce, therefore when environment temperature is higher than a certain temperature, its electrical quantity just might surpass the constant temperature alarming threshold value of setting, will produce false alarm like this, therefore the use length of this linear temperature sensor will be restricted in actual applications.
Summary of the invention
In order to address the above problem, the purpose of this utility model be to provide a kind of can be waterproof and dampproof, and can prolong the line-type heat detector that uses length.
In order to achieve the above object, the line-type heat detector that provides of the utility model mainly is made up of linear temperature sensor and the boxcar that is connected linear temperature sensor one end; Wherein linear temperature sensor comprises two parallel detecting conductors that are provided with and parallel fusible salt material layer and the NTC characteristic barrier layer that is arranged between two detecting conductors.
At least one outside is coated with fusible salt material layer and NTC characteristic barrier layer successively in the described detecting conductor.
At least one outside is coated with NTC characteristic barrier layer and fusible salt material layer successively in the described detecting conductor.
An external packets in the described detecting conductor is covered with the NTC characteristic barrier layer, and another root external packets is covered with fusible salt material layer.
The external packets of described detecting conductor, fusible salt material layer and NTC characteristic barrier layer is covered with insulating sheath.
A detecting conductor in the described linear temperature sensor is a thermocouple wire.
The line-type heat detector that the utility model provides is fusible salt material layer and NTC characteristic barrier layer are arranged between two detecting conductors and constitute linear temperature sensor, when breaking out of fire, but the temperature of linear temperature sensor heated part will surpass the temperature of fusion of fused salt, thereby but the electric conductivity of fused salt is changed, it is very little to be that resistance value becomes, this moment, the electrical quantity size of linear temperature sensor was mainly decided by the resistance of heat affected zone intersegmental part NTC characteristic barrier layer, and be subjected to the influence of other area segments linear temperature sensor very little, therefore can increase the use length of linear temperature sensor greatly.And be installed in wet environment following time when linear temperature sensor, in case outside moisture enters into the inside of linear temperature sensor, the fused salt of inside, position is met water and will be produced dissolving but this makes moist, it is the relative conducting in this position, but owing to also be provided with the NTC characteristic barrier layer between two detecting conductors, so just can therefore not cause false alarm, thereby can guarantee that line-type heat detector is working properly.
Description of drawings
Fig. 1 is a linear temperature sensor transverse sectional view in the line-type heat detector of prior art.
The line-type heat detector structural representation that Fig. 2 provides for the utility model.
Linear temperature sensor transverse sectional view in the line-type heat detector that Fig. 3 provides for the utility model.
Linear temperature sensor partial structurtes cut-open view in the line-type heat detector that the utility model provided when Fig. 4 adopted coaxial manner to be provided with for detecting conductor.
Fig. 5 is the line-type heat detector equivalent circuit theory synoptic diagram shown in Fig. 2.
Embodiment
Below in conjunction with drawings and the specific embodiments the line-type heat detector that the utility model provides is elaborated.
Embodiment 1:
The line-type heat detector structural representation that Fig. 2 provides for the utility model.Linear temperature sensor transverse sectional view in the line-type heat detector that Fig. 3 provides for the utility model.As Fig. 2, shown in Figure 3, the line-type heat detector that the utility model provides mainly is made up of linear temperature sensor and the boxcar 19 that is connected linear temperature sensor one end; Wherein linear temperature sensor is made up of two parallel detecting conductors that are provided with 5,9 and parallel fusible salt material layer 6 and the NTC characteristic barrier layer 7 that is arranged between the detecting conductor 5,9.Be coated with fusible salt material layer 6 and NTC characteristic barrier layer 7 on the detecting conductor 5 successively, can certainly on detecting conductor 5, coat NTC characteristic barrier layer 7 and fusible salt material layer 6 successively, or fusible salt material layer 6 and NTC characteristic barrier layer 7 be coated on respectively on two detecting conductors 5,9.In addition, can be covered with insulating sheath in the external packets of linear temperature sensor, this insulating sheath not only can make linear temperature sensor and external insulation, but also can play waterproof and dampproof effect to fusible salt material layer 6.In addition, also can connect a terminal resistance 18 that works the supervision effect of opening circuit at the other end of linear temperature sensor.
Detecting conductor 5,9 can be hollow core conductor, solid conductor or metal fibre braided wire, and that parallel setting then comprises is parallel, winding and mode such as coaxial.When detecting conductor 5,9 adopted coaxial manners to be provided with, as shown in Figure 4, the seal boot of detecting conductor 5 for being made by aluminium foil added the isometric metallic conductor silk 20 of one and detecting conductor 5 within it on the periphery, be convenient to wiring like this.
Described NTC characteristic barrier layer 7 employed materials are selected from a kind of in polyacetylene, polyaniline, polythiophene, the poly-phthalein mountain valley with clumps of trees and bamboo, and its thickness range is 0.1～5mm, and the thickness range of fusible salt material layer 6 then is 0.05～10mm.
Fig. 5 is the line-type heat detector equivalent circuit theory synoptic diagram shown in Fig. 2.As shown in Figure 5, R1 ' is the equivalent resistance of the NTC characteristic barrier layer 7 of unit length heat affected zone (or the zone that makes moist), R1 is the not equivalent resistance of the NTC characteristic barrier layer 7 of heat affected zone (or the zone that do not make moist) of unit length, R2 ' is the equivalent resistance of the fusible salt material layer 6 of unit length heat affected zone (or the zone that makes moist), R2 then is the not equivalent resistance of the fusible salt material layer 6 of heat affected zone (or the zone that do not make moist) of unit length, and its principle of work is as follows:
1) under normal circumstances, this moment, but external temperature was lower than the temperature of fusion of fused salt, but the fused salt in the fusible salt material layer 6 of whole linear temperature sensor inside is fusing not, even the resistance of NTC characteristic barrier layer 7 can and use the increase of length to reduce with the environment temperature rising in the linear temperature sensor, but the resistance of fusible salt material layer 6 is still very big, so the boxcar 19 that is connected linear temperature sensor one end can not be subjected to the influence of environment temperature yet and big variation takes place its electrical quantity that detects (or sampled value) size, thus can eliminate only have the NTC characteristic barrier layer line-type heat detector because of variation of ambient temperature and use the long false alarm that causes of length.
2) when breaking out of fire, but the temperature of heated part will surpass the temperature of fusion of fused salt on the linear temperature sensor, at this moment but the electric conductivity of the fused salt of its inside can be undergone mutation, R2 ' resistance value that promptly should the zone will become very little (being equivalent to the conducting of heat affected zone section), this moment, the heat affected zone section just became the line-type heat detector of common NTC characteristic, the electrical quantity size of the linear temperature sensor that boxcar 19 detects is mainly by the resistance R 1 of heat affected zone intersegmental part NTC characteristic barrier layer 7 ' decide, and sends fire alarm signal when resistance R 1 ' above the constant temperature alarming threshold value.
3) be installed in wet environment following time when linear temperature sensor, this moment, environment temperature was lower than the constant temperature alarm temperature.In case outside moisture enters into the whole or local interior of linear temperature sensor, but meeting water, the fused salt in the fusible salt material layer 6 of the inside, position that makes moist to produce dissolving, resistance R 2 that promptly should the zone ' will become very little, but because environment temperature is low, so two detecting conductors 5, also be provided with NTC characteristic barrier layer 7 between 7, i.e. resistance R 1 ' still very big; The main resistance R 1 of electrical quantity size of the linear temperature sensor of boxcar 19 detections this moment ' decide by the regional intersegmental part NTC characteristic barrier layer 7 that makes moist, so just can therefore not cause false alarm, thereby can guarantee that line-type heat detector is working properly.
Embodiment 2:
Present embodiment is the improvement on embodiment 1 basis: one that is about in two detecting conductors 5,9 of above-mentioned linear temperature sensor is adopted thermocouple wire to make, thereby form a linear temperature sensor with thermocouple characteristic with another root detecting conductor, boxcar 19 will send fire alarm signal according to voltage (electromotive force) value of linear temperature sensor this moment.
Claims (6)
1. line-type heat detector mainly is made up of linear temperature sensor and the boxcar (19) that is connected linear temperature sensor one end; Wherein linear temperature sensor comprises two parallel detecting conductors (5 that are provided with, 9) and parallel be arranged on two detecting conductors (5,9) the fusible salt material layer (6) between, it is characterized in that: described linear temperature sensor also comprises a parallel NTC characteristic barrier layer (7) that is arranged between the detecting conductor (5,9).
2. line-type heat detector according to claim 1 is characterized in that: at least one outside is coated with fusible salt material layer (6) and NTC characteristic barrier layer (7) successively in the described detecting conductor (5,9).
3. line-type heat detector according to claim 1 is characterized in that: at least one outside is coated with NTC characteristic barrier layer (7) and fusible salt material layer (6) successively in the described detecting conductor (5,9).
4. line-type heat detector according to claim 1 is characterized in that: an external packets in the described detecting conductor (5,9) is covered with NTC characteristic barrier layer (7), and another root external packets is covered with fusible salt material layer (6).
5. according to claim 1,2,3 or 4 described line-type heat detectors, it is characterized in that: the external packets of described detecting conductor (5,9), fusible salt material layer (6) and NTC characteristic barrier layer (7) is covered with insulating sheath.
6. line-type heat detector according to claim 1 is characterized in that: a detecting conductor in the described linear temperature sensor is a thermocouple wire.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200955018U CN201017432Y (en) | 2007-03-15 | 2007-03-15 | Linetype temperature-sensing fire disaster detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200955018U CN201017432Y (en) | 2007-03-15 | 2007-03-15 | Linetype temperature-sensing fire disaster detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201017432Y true CN201017432Y (en) | 2008-02-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200955018U Expired - Lifetime CN201017432Y (en) | 2007-03-15 | 2007-03-15 | Linetype temperature-sensing fire disaster detector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201017432Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104484973A (en) * | 2014-12-23 | 2015-04-01 | 王文波 | Composite cable type heat fire detector |
-
2007
- 2007-03-15 CN CNU2007200955018U patent/CN201017432Y/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104484973A (en) * | 2014-12-23 | 2015-04-01 | 王文波 | Composite cable type heat fire detector |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: CO-PATENTEE TO: LI GANGJIN ¬ |
|
| CU01 | Correction of utility model patent |
Correction item: Co-patentee Correct: Li Gangjin Number: 06 Page: The title page Volume: 24 |
|
| CU03 | Correction of utility model patent gazette |
Correction item: Co-patentee Correct: Li Gangjin Number: 06 Volume: 24 |
|
| ERR | Gazette correction |
Free format text: CORRECT: CO-PATENTEE; FROM: NONE ¬ TO: LI GANGJIN ¬ |
|
| ASS | Succession or assignment of patent right |
Owner name: SURELAND INDUSTRIAL FIRE SAFETY CO., LTD Free format text: FORMER OWNER: ZHANG WEISHE Effective date: 20090710 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20090710 Address after: BeiJing Capital Airport South Industrial Zone Banbidian Lee Road No. 22, zip code: 101304 Patentee after: Sureland Industry Fire-Fighting Co., Ltd. Address before: The construction of the road in the middle of Xiqing Yangliuqing town, Tianjin District 55, zip code: 300380 Co-patentee before: Li Gangjin Patentee before: Zhang Wei |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Linear temperature-sensing fire detector Effective date of registration: 20121010 Granted publication date: 20080206 Pledgee: Bank of America Ltd. Shanghai branch Pledgor: Sureland Industry Fire-Fighting Co., Ltd. Registration number: 2012990000591 |
|
| PLDC | Enforcement, change and cancellation of contracts on pledge of patent right or utility model | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20080206 |
|
| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20171114 Granted publication date: 20080206 Pledgee: Bank of America Ltd. Shanghai branch Pledgor: Sureland Industry Fire-Fighting Co., Ltd. Registration number: 2012990000591 |