CN205508050U - Unrecoverable line type thermal detector - Google Patents
Unrecoverable line type thermal detector Download PDFInfo
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- CN205508050U CN205508050U CN201620258173.8U CN201620258173U CN205508050U CN 205508050 U CN205508050 U CN 205508050U CN 201620258173 U CN201620258173 U CN 201620258173U CN 205508050 U CN205508050 U CN 205508050U
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- heat detector
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Abstract
The utility model provides a but temperature sensing cable adopts to superpose between two detection conductors and sets up netted insulating layer 15 and melting semiconductor layer 16's structure, and the softening point temperature ratio of netted insulating layer 15 is higher, but the semiconductor layer 16 of melting simultaneously hardness is better than the melting insulating layer hardness among the prior art far away, so not only reduce by two detection conductor -twisted wire technology neutralization probabilities that the short circuit contacted in temperature sensing cable's cladding cable jacket extrusion molding technology at temperature sensing cable widely, and avoided temperature sensing cable external mechanical force effect in transportation or use to cause accidental damage.
Description
Technical field
This utility model belongs to fire alarm technique field, particularly relates to a kind of irrecoverable line-type heat detector.
Background technology
Line-type heat detector extensively applies fire detection alarm field, is divided into renewable type and the big class of beyond retrievable two.Disclosing the irrecoverable line-type heat detector that a kind of band short trouble is reported to the police in Chinese Patent No. 200620133478.2, this detector can distinguish short trouble and fire two kinds of situations of short circuit.It includes that signal processing unit that temperature sensing cable is connected with its one end and the other end thereof connect termination box, detection cable thereon includes detecting conductor and the fused insulating layer of at least two stranded settings, described detection cable also includes semiconductor layer, wherein, described semiconductor material layer and fused insulating layer are arranged between two conductors, to separate described detecting conductor.
In the detection cable of this irrecoverable line-type heat detector, fused insulating layer is arranged between two detecting conductors, in the case of room temperature softer, the detecting conductor adjacent with fused insulating layer and semiconductor layer generation partial points contact phenomena not only easily occur when the wire stranding that two detecting conductors twist together during processing；And in the extrusion molding operation of detection cable cladding oversheath, the detecting conductor adjacent with fused insulating layer and semiconductor layer generation partial points contact phenomena occur equally；Thus causing the processing technique of detection cable to require that difficulty is big, product qualified rate is the lowest.Additionally, this irrecoverable line-type heat detector detection cable be heated or detecting conductor adjacent with fused insulating layer under mechanical external force effect and its occur partial points contact cause signal processing unit detection signal of telecommunication instability problem, described detection cable must also arrange conductive layer between described semiconductor layer and described fused insulating layer.
Summary of the invention
In order to solve the problems referred to above, mesh of the present utility model is to provide a kind of irrecoverable line-type heat detector, including temperature sensing cable and the signal processing unit and the terminal resistance that are connected to temperature sensing cable two ends；Wherein temperature sensing cable is mainly provided with netted insulating barrier and melting semiconductor layer by superposition between two and the detecting conductor that twists together forms.
Preferential, the softening point temperature of melting semiconductor layer is within 40 DEG C～180 DEG C of scopes, and the softening point temperature of netted insulating barrier is within 80 DEG C～250 DEG C of scopes.
Preferential, in described two detecting conductors, at least one is elastic detecting conductor.
Further, described elastic detecting conductor is at least one in elastic metallic yarn, memory alloy wire and elastic metallic pipe.
Preferential, the resistance value of described terminal resistance R is 100 Ω～20M Ω.
Preferential, described melting semiconductor layer is by semi-conductive rubber, semiconductive ceramic, semiconductive plastics, at least one is made, and its electrical resistivity range is 10-4-1010Ω•cm。
Further, the electrical resistivity range of described melting semiconductor layer is 10-4-108Ω•cm。
Further, described melting layer semiconductor thickness is within 0.1～5 millimeter of scope.
Preferential, by in polyethylene, polypropylene, polrvinyl chloride, nylon and politef, at least one makes described netted insulating barrier, or is formed by least one braiding in dacron thread, spandex thread, polypropylene fiber silk, nylon yarn, cotton thread, linen thread, Si Mao and carbon fiber wire.
Further, described netted thickness of insulating layer is within 0.1～2 millimeter of scope.
Preferential, also including the sheath being coated on outside temperature sensing cable, it is made up of PVC, PE, rubber, chemical fibre or braided metal silk.
The temperature sensing cable that this utility model provides uses superposition between two detecting conductors to arrange netted insulating barrier and the structure of melting semiconductor layer, the softening point temperature of netted insulating barrier is higher, melting semiconductor layer hardness is better than far away fused insulating layer hardness of the prior art simultaneously, is the most not only greatly reduced in two detecting conductor stranding process of temperature sensing cable and the probability of shorted contacts in the cladding cable jacket extrusion process of temperature sensing cable；And avoid temperature sensing cable mechanical external force effect during transport or use and cause accidental damage.It addition, melting semiconductor layer uses the semi-conducting material of low resistance in the temperature sensing cable of this utility model offer, the software and hardware unit of signal processing unit can be the most easier, and cost can reduce；Even if simultaneously when breaking out of fire, produce between detecting conductor by melting quasiconductor partial points contact phenomena, owing to using low resistance semiconductor material layer, without arranging conductive layer between netted insulating barrier and melting semiconductor layer, it is possible to avoid the problem that the temperature sensing cable detection signal of telecommunication is unstable.
Accompanying drawing explanation
Fig. 1 is irrecoverable line-type heat detector structural representation disclosed in prior art.
The irrecoverable line-type heat detector structural representation that Fig. 2 provides for this utility model.
The irrecoverable line-type heat detector schematic equivalent circuit that Fig. 3 provides for this utility model.
Detailed description of the invention
The irrecoverable line-type heat detector provided this utility model below in conjunction with the drawings and specific embodiments below describes in detail, but protection domain of the present utility model is not limited to herein below.
As in figure 2 it is shown, the irrecoverable line-type heat detector that the present embodiment provides, including temperature sensing cable 1 and the signal processing unit 2 and the terminal resistance 3 that are connected to temperature sensing cable 1 two ends；Wherein temperature sensing cable 1 is mainly provided with netted insulating barrier 15 and melting semiconductor layer 16 by superposition between two and the detecting conductor 11,13 that twists together forms.
As shown in Figure 3, the schematic equivalent circuit of the irrecoverable line-type heat detector that this utility model provides, including terminal resistance R, signal processing unit 2, detecting conductor 11 and 13, the resistance R1 that melting semiconductor layer 16 is equivalent in figure, and the switch K that netted insulating barrier 15 is equivalent in figure, wherein, the resistance value of terminal resistance R is preferably 100 Ω～20M Ω；Signal processing unit 2 is connected electrically in one end of temperature sensing cable 1, and terminal resistance R is connected electrically in its other end.
Now the irrecoverable cable linear temperature sensing fire detector operation principle that this utility model provides is described below:
Under normal circumstances, the most non-breaking out of fire, in the case of there is no fault yet, melting semiconductor layer 16 also stands intact, in the case of being spaced together detecting conductor with netted insulating barrier 15, at this moment switch K neither one Guan Bi, the resistance value that resistance value r is terminal resistance R that temperature sensing cable 1 is detected by signal processing unit 2, i.e. r=R.
When open circuit fault occurs, as temperature sensing cable somewhere occurs open circuit (in detecting conductor 11 and 13, at least occurs open circuit etc.), now melting semiconductor layer 16 still remains intact, it is spaced together detecting conductor 11,13 with netted insulating barrier 15, the switch K be i.e. equivalent in Fig. 3 does not close, but the circuit somewhere that detecting conductor 11,13 and terminal resistance R is formed occurs open circuit.Therefore, now signal processing unit 2 is infinitely great to resistance detection value r of temperature sensing cable 1, and at this moment signal processing unit 2 exports open circuit fault signal.
When short trouble occurs, as in the case of there is no fire, between two detecting conductors 11,13 of temperature sensing cable, complete conducting contact occurs somewhere, short trouble i.e. occurs, be equivalent in Fig. 3 wire 11,13 and terminal resistance R and form circuit somewhere when being short-circuited, now, signal processing unit 2 detects resistance value r of temperature sensing cable 1 and is approximately zero.At this moment signal processing unit 2 output short-circuit fault-signal.
When a fire, i.e., when temperature sensing cable 1 heat affected zone temperature increases, when reaching the softening temperature of melting semiconductor layer 16, melting semiconductor layer 16 softens and at two detecting conductors 11, between 13 under elastic force effect, the detecting conductor adjacent with netted insulating barrier 15 is pressed to through netted insulating barrier 15, result causes two detecting conductors to soften local mediate contact by melting semiconductor layer 16, at this moment, signal processing unit 2 detects resistance value r of temperature sensing cable 1 and is determined by melting semi-conductor electricity resistance and the terminal resistance R parallel resistance value size in mediate contact region, i.e. 0 < r < R, signal processing unit 2 exports fire alarm signal according to this detection resistance value.
Irrecoverable line-type heat detector of the present utility model can also detect the resistance value r size of temperature sensing cable 1 according to signal processing unit 2, reliably exports different alarm signals, also improves the reliability of irrecoverable line-type heat detector equally.
In this utility model, in two detecting conductors 11,13, at least one is elastic detecting conductor；At least one in elastic metallic yarn, memory alloy wire and elastic metallic pipe of elastic detecting conductor；Melting semiconductor layer 16 is mixed by one of semi-conductive rubber, semiconductive ceramic, semiconductive plastics or different materials, and electrical resistivity range is 10-4-1010Ω cm, its softening point temperature is in the range of 40 DEG C～180 DEG C, and its thickness can be preferentially 0.1～5 millimeter of scope；Wherein melting semiconductor layer preferentially selects resistivity to be 10-4-108Ω cm semi-conducting material is made；Netted insulating barrier 15 is at least made up of materials such as polyethylene, polypropylene, polrvinyl chloride, nylon, politef, and its softening point temperature is in the range of 80 DEG C～250 DEG C, and its thickness can be preferentially 0.1～2 millimeter of scope；Netted insulating barrier can also form with the softening points such as dacron thread, spandex thread, polypropylene fiber silk, nylon yarn, carbon fiber wire fiber wire in the range of 80 DEG C～250 DEG C or cotton thread, linen thread, the braiding of silk hair, and fiber wire diameter can be preferentially 0.1～2 millimeter of scope.
Described irrecoverable cable linear temperature sensing fire detector also includes being coated on the sheath outside temperature sensing cable 1, and sheath is made up of PVC, PE, rubber, chemical fibre or braided metal silk.
The temperature sensing cable structure that this utility model provides uses superposition between two detecting conductors to arrange netted insulating barrier and the structure of melting semiconductor layer, following situation is caused to occur: first in two detecting conductor stranding process of temperature sensing cable, owing to arranging a netted insulated barriers layer between two detecting conductors, melting semiconductor layer hardness is better than far away fused insulating layer hardness (during stranding process) of the prior art simultaneously, and the probability directly producing shorted contacts between detecting conductor is 0；Secondly in the cladding cable jacket extrusion process of temperature sensing cable, owing to arranging a high temperature resistant netted insulated barriers layer between two detecting conductors, equally, the probability directly producing shorted contacts between detecting conductor is 0；Last temperature sensing cable is during transport or using, owing to arranging a netted insulated barriers layer between two detecting conductors, melting semiconductor layer hardness is better than far away fused insulating layer hardness (normal temperature environment) of the prior art simultaneously, causing direct short-circuit probability between temperature sensing cable detecting conductor under the effect of mechanical external force is 0, greatly reduces detector wrong report fire alarm probability.In a word, use temperature sensing cable structure of the present utility model, not only greatly increase product factory process process product qualified rate, and avoid temperature sensing cable mechanical external force effect during transport or use and cause accidental damage.
It addition, melting semiconductor layer uses the semi-conducting material of low resistance in the temperature sensing cable of this utility model offer, signal processing unit can be the most easier to the detection software and hardware unit of temperature sensing cable, and cost can reduce；Even if temperature sensing cable is when breaking out of fire simultaneously, produce between detecting conductor by melting quasiconductor partial points contact phenomena, owing to using low resistance semiconductor material layer, without arranging conductive layer between netted insulating barrier and melting semiconductor layer, it is also possible to avoid the problem that the temperature sensing cable detection signal of telecommunication is unstable.
Although, this utility model is illustrated, it will be understood that this utility model can be changed in the case of without departing from connotation of the present utility model and scope or improve by those skilled in the art above in association with accompanying drawing and enforcement technical scheme.Such as, although above-mentioned enforcement technical scheme only illustrating, temperature sensing cable includes the situation of two detecting conductors, but those skilled in the art are come, completely can temperature sensing cable detecting conductor using three and more than three etc. as required.
Claims (10)
1. an irrecoverable line-type heat detector, the signal processing unit (2) including temperature sensing cable (1) and being connected to temperature sensing cable (1) two ends and terminal resistance (3)；It is characterized in that: wherein temperature sensing cable (1) is mainly provided with netted insulating barrier (15) and melting semiconductor layer (16) by superposition between two and the detecting conductor (11,13) that twists together forms.
Irrecoverable line-type heat detector the most according to claim 1, it is characterised in that: the softening point temperature of described melting semiconductor layer (16) is within 40 DEG C～180 DEG C of scopes；The softening point temperature of described netted insulating barrier (15) is within 80 DEG C～250 DEG C of scopes.
Irrecoverable line-type heat detector the most according to claim 1, it is characterised in that: in described two detecting conductors (11,13), at least one is elastic detecting conductor.
Irrecoverable line-type heat detector the most according to claim 3, it is characterised in that: described elastic detecting conductor is at least one in elastic metallic yarn, memory alloy wire and elastic metallic pipe.
Irrecoverable line-type heat detector the most according to claim 1, it is characterised in that: the resistance value of described terminal resistance R is 100 Ω～20M Ω.
Irrecoverable line-type heat detector the most according to claim 1, it is characterised in that: described melting semiconductor layer (16) is by semi-conductive rubber, semiconductive ceramic, semiconductive plastics, at least one is made, and its electrical resistivity range is 10-4-1010Ω•cm。
Irrecoverable line-type heat detector the most according to claim 6, it is characterised in that: the electrical resistivity range of described melting semiconductor layer (16) is 10-4-108Ω•cm。
8. according to the irrecoverable line-type heat detector described in claim 1 or 6, it is characterised in that: described melting semiconductor layer (16) thickness is within 0.1～5 millimeter of scope.
Irrecoverable line-type heat detector the most according to claim 1, it is characterized in that: at least one makes described netted insulating barrier (15) by polyethylene, polypropylene, polrvinyl chloride, nylon and politef, or formed by least one braiding in dacron thread, spandex thread, polypropylene fiber silk, nylon yarn, cotton thread, linen thread, Si Mao and carbon fiber wire.
Irrecoverable line-type heat detector the most according to claim 8, it is characterised in that: described netted insulating barrier (15) thickness is within 0.1～2 millimeter of scope.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620258173.8U CN205508050U (en) | 2016-03-31 | 2016-03-31 | Unrecoverable line type thermal detector |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201620258173.8U CN205508050U (en) | 2016-03-31 | 2016-03-31 | Unrecoverable line type thermal detector |
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| CN205508050U true CN205508050U (en) | 2016-08-24 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018144589A1 (en) * | 2017-01-31 | 2018-08-09 | The Regents Of The University Of California | Stretchable, conductive interconnect and/or sensor and method of making the same |
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2016
- 2016-03-31 CN CN201620258173.8U patent/CN205508050U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018144589A1 (en) * | 2017-01-31 | 2018-08-09 | The Regents Of The University Of California | Stretchable, conductive interconnect and/or sensor and method of making the same |
| US10908038B2 (en) | 2017-01-31 | 2021-02-02 | The Regents Of The University Of California | Stretchable, conductive interconnect and/or sensor and method of making the same |
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