CN101021965A - Linear temperature-sensing fire detector - Google Patents
Linear temperature-sensing fire detector Download PDFInfo
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- CN101021965A CN101021965A CN 200710056943 CN200710056943A CN101021965A CN 101021965 A CN101021965 A CN 101021965A CN 200710056943 CN200710056943 CN 200710056943 CN 200710056943 A CN200710056943 A CN 200710056943A CN 101021965 A CN101021965 A CN 101021965A
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- temperature sensor
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Abstract
This invention discloses a linetype temperature-sensing fire detector composed of linetype temperature-sensing elements and a converting box connected at one end of the elements, in which, the elements include two parallel set detection conductors and a metable salt material layer and a metable insulation layer set in parallel between the conductors, at least one is elastic, which sets the metable salt material layer and an insulation layer between two detection conductors to constitute a linetype temperature sensing element, even though outside moisture enters into it to melt the metable salt, yet a metable insulation layer still exists, and error warning will not happen to the fire detector.
Description
Technical field
The present invention relates to a kind of line-type heat detector, particularly relate to a kind of can moistureproof and waterproof, the high line-type heat detector of reliability of therefore reporting to the police.
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.
Summary of the invention
In order to address the above problem, the object of the present invention is to provide a kind of can moistureproof and waterproof, the high line-type heat detector of reliability of therefore reporting to the police.
In order to achieve the above object, line-type heat detector provided by the invention 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 fused insulating layers that are arranged between the detecting conductor, and in the detecting conductor at least one be elastic conductor.
A detecting conductor in the described linear temperature sensor is a thermocouple wire.
At least one outside is coated with fusible salt material layer and fused insulating layer successively in the described detecting conductor.
At least one outside is coated with fused insulating layer and fusible salt material layer successively in the described detecting conductor.
An external packets in the described detecting conductor is covered with fused insulating 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 fused insulating layer is covered with insulating sheath.
Line-type heat detector provided by the invention is fusible salt material layer and fused insulating layer are arranged between two detecting conductors and constitute linear temperature sensor, even outside like this moisture enters into the inside of linear temperature sensor and but the fused salt at this position is dissolved, but owing to still have not softening fused insulating layer between two detecting conductors, therefore line-type heat detector can not cause false alarm therefrom yet, 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.
Fig. 2 is a line-type heat detector structural representation provided by the invention.
Fig. 3 is a linear temperature sensor transverse sectional view in the line-type heat detector provided by the invention.
Linear temperature sensor partial structurtes cut-open view in the line-type heat detector provided by the invention when Fig. 4 adopts coaxial manner to be provided with for detecting conductor.
Embodiment
Below in conjunction with drawings and the specific embodiments line-type heat detector provided by the invention is elaborated.
Embodiment 1:
Fig. 2 is a line-type heat detector structural representation provided by the invention.Fig. 3 is a linear temperature sensor transverse sectional view in the line-type heat detector provided by the invention.As Fig. 2, shown in Figure 3, line-type heat detector provided by the invention 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 that are provided with 5,9 and parallelly is arranged on detecting conductor 5, but the fused salt between 9 (or eutectic salts) material layer 6 and fused insulating layer 7, and in the detecting conductor 5,9 at least one be elastic conductor.Be coated with fusible salt material layer 6 and fused insulating layer 7 on the detecting conductor 5 successively, can certainly on detecting conductor 5, coat fused insulating layer 7 and fusible salt material layer 6 successively, or fusible salt material layer 6 and fused insulating 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.
Described 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 adopts coaxial manner to be provided with, as shown in Figure 4, the seal boot of detecting conductor 5 for making by aluminium foil, add the isometric metallic conductor silk 20 of one and detecting conductor 5 within it on the periphery, be convenient to wiring like this, and it can also play waterproof and dampproof effect.
Described fused insulating layer 7 employed materials are selected from a kind of in a kind of or low density polyethylene in wax, naphthalene, anthracene, stearic acid, the rosalin, high density polyethylene, linear low density polyethylene, polypropylene, Polyvinylchloride, natural rubber, nitrile rubber, the ethylene-propylene-diene rubber, its melting range is 40～220 ℃, thickness is between 0.05～10mm, and the thickness range of fusible salt material layer 6 then is 0.05～10mm.
Described elastic conductor can adopt memory alloy wire or carbon spring steel wires.Memory alloy wire can be a kind of in Ultimum Ti, NiTi copper memorial alloy, iron-based memorial alloy, the copper-based memory alloy material.The design load of the martensite phase transformation finishing temperature Af of memory alloy wire can be selected to set in 20～140 ℃ of scopes.
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.
The principle of work of line-type heat detector provided by the invention is as follows:
1) under normal circumstances, this moment, but environment temperature was lower than the temperature of fusion of fused salt and the softening temperature of fused insulating layer 7 simultaneously, but the fused salt of linear temperature sensor inside is fusing not, fused insulating layer 7 is not softening yet simultaneously, so detecting conductor 5, resistance between 9 is still very big, and at this moment electrical quantity (or sampled value) size of boxcar 19 detected linear temperature sensors can not surpass the constant temperature alarming threshold value, so detector can not send alerting signal.
2) when breaking out of fire, but the temperature of heated part will be higher than the temperature of fusion of fused salt and the softening temperature of fused insulating layer 7 on the linear temperature sensor, but the electric conductivity of the fused salt of this inside, position can be undergone mutation at this moment, be that its resistance value becomes very little (being equivalent to the conducting of heat affected zone section), meanwhile, the detecting conductor 5 of heated part, the distortional stress that exists between 9 will eliminate the fused insulating layer 7 of this inside, position, thereby make detecting conductor 5, resistance between 9 becomes very little, at this moment boxcar 19 can detect this variation immediately, and when the electrical quantity size of linear temperature sensor surpasses the constant temperature alarming threshold value, send fire alarm signal, thereby can report to the police reliably.
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 it is inner that outside moisture enters into the whole or regional area of linear temperature sensor, but meeting water, the fused salt of this intra-zone will produce dissolving, it is very little to be that its resistance value can become, but because two detecting conductors 5, also there is not softening fused insulating layer 7 between 9, so detecting conductor 5, resistance between 9 is still very big, at this moment electrical quantity (or sampled value) size of boxcar 19 detected linear temperature sensors can not exceed the constant temperature alarming threshold value, thereby can not cause false alarm therefrom, thereby can guarantee that line-type heat detector is working properly.
Claims (6)
1, a kind of 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 the parallel detecting conductor (5 that is arranged on, 9) the fusible salt material layer (6) between, it is characterized in that: described linear temperature sensor also comprises a parallel detecting conductor (5 that is arranged on, 9) fused insulating layer between (7), and at least one is elastic conductor in the detecting conductor (5,9).
2, 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.
3, 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 fused insulating layer (7) successively in the described detecting conductor (5,9).
4, line-type heat detector according to claim 1 is characterized in that: at least one outside is coated with fused insulating layer (7) and fusible salt material layer (6) successively in the described detecting conductor (5,9).
5, 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 fused insulating layer (7), and another root external packets is covered with fusible salt material layer (6).
6, according to claim 1,2,3,4 or 5 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 fused insulating layer (7) is covered with insulating sheath.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200710056943 CN101021965A (en) | 2007-03-16 | 2007-03-16 | Linear temperature-sensing fire detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200710056943 CN101021965A (en) | 2007-03-16 | 2007-03-16 | Linear temperature-sensing fire detector |
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| CN101021965A true CN101021965A (en) | 2007-08-22 |
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| CN 200710056943 Pending CN101021965A (en) | 2007-03-16 | 2007-03-16 | Linear temperature-sensing fire detector |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105318979A (en) * | 2014-06-18 | 2016-02-10 | 基德科技公司 | Thermal sensor |
| CN105333977A (en) * | 2014-06-18 | 2016-02-17 | 基德科技公司 | Thermal sensor |
-
2007
- 2007-03-16 CN CN 200710056943 patent/CN101021965A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105318979A (en) * | 2014-06-18 | 2016-02-10 | 基德科技公司 | Thermal sensor |
| CN105333977A (en) * | 2014-06-18 | 2016-02-17 | 基德科技公司 | Thermal sensor |
| CN105333977B (en) * | 2014-06-18 | 2020-09-15 | 基德科技公司 | Heat sensor |
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Owner name: SHOU AN INDUSTRY FIRE LTD. Free format text: FORMER OWNER: ZHANG WEISHE; APPLICANT Effective date: 20080704 |
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Effective date of registration: 20080704 Address after: Beijing City, the Capital Airport South Industrial Zone Banbidian Road No. 22 Lee post encoding: 101304 Applicant after: Sureland Industry Fire-Fighting Co., Ltd. Address before: The construction of the road in the middle of Xiqing Yangliuqing town, Tianjin District 55 post encoding: 300380 Applicant before: Zhang Wei Co-applicant before: Li Gangjin |
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