CN2824171Y - Discrete thermistor series analog quantity line type temp sensing fire detecting cable - Google Patents
Discrete thermistor series analog quantity line type temp sensing fire detecting cable Download PDFInfo
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- CN2824171Y CN2824171Y CN 200520119066 CN200520119066U CN2824171Y CN 2824171 Y CN2824171 Y CN 2824171Y CN 200520119066 CN200520119066 CN 200520119066 CN 200520119066 U CN200520119066 U CN 200520119066U CN 2824171 Y CN2824171 Y CN 2824171Y
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Abstract
The utility model relates to an analog quantity line-type temperature-sensing fire detecting cable with discrete thermistors connected in series. The utility model is characterized in that the utility model has a detecting cable body which can generate series impedance signals; signal output terminals which can be connected with a resistance signal measuring device are respectively installed on both ends of the detecting cable body; a plurality of thermistors are arranged on the middle part of the detecting cable body; the thermistors are orderly connected in series. The utility model has the advantages that an initial resistance can be recovered automatically; the utility model can be used repeatedly; the utility model can improve the reliability, the sensitivity and the service life of a detector.
Description
Technical field
The utility model relates to a kind of discrete thermistor tandem analog linear temperature-sensing fire detecting cable, this detection cable is in series by a plurality of separate thermistors, formation can produce the detection line body of series impedance signal, can adopt this detection cable to carry out fire detecting and alarm separately.
Background technology
In the prior art, the analog linear temperature-sensing detector of NTC characteristic is a kind of broad-spectrum fire detector, in the detection cable of this detector, two detecting conductors are arranged, the material layer that a NTC characteristic is arranged between detecting conductor, when detector is heated, rising along with temperature, the resistance of the NTC material between two detecting conductors can diminish (electric capacity increase), form line style constant temperature or differential fire detector according to the order of magnitude of resistance variations or the size of rate of change, reach the purpose that thermometric is reported a fire thus.The disclosed sensing cable of Chinese patent ZL03242897.9 is exactly wherein a kind of.Because length, heating temperature, the NTC material layer environment temperature of living in that the change in resistance between two detecting conductors and the rate of change of resistance and NTC material layer are heated is relevant with the four big factors such as whole length of surveying cable, like this will be to the reliability and the sensitivity generation adverse influence of detector.The heating temperature of NTC characteristic material layer relevant with two factors of length of being heated to other factors had nothing to do or concern less when we wished that two resistances (or electric capacity) between the detecting conductor change only with breaking out of fire.But analog linear temperature-sensing detector of the prior art can't be realized, for this reason, needs to propose a kind of new analog linear temperature-sensing fire detecting cable.
Summary of the invention
The purpose of this utility model is to provide a kind of discrete thermistor tandem analog linear temperature-sensing fire detecting cable, a plurality of separate thermistor in this detection cable is the relation of being connected in series, can produce and output series impedance signal according to the situation of being heated, use this detection cable to carry out detection, can improve the reliability of detector and the use length of cable.
The purpose of this utility model is realized by following technical proposals: a kind of discrete thermistor tandem analog linear temperature-sensing fire detecting cable, its main points are: a detection line body that can produce the series impedance signal is arranged, the signal output terminal that can be connected with the resistance signal measurement mechanism is equipped with at these detection line body two ends respectively, this detection line body middle part is provided with a plurality of thermistors, and described a plurality of thermistors are connected in series successively.
Compared with the prior art the utility model has following advantage:
1, the thermistor that adopts of the utility model has reciprocal characteristics, and after surveying cable and finishing warning, along with recovering naturally of the environment temperature of the releasing of alert, alarm region, this thermistor recovers its initial resistance automatically, so can reuse after the warning.
2, the utility model can use separately, also can with the compound use of detection cable of other type, to improve reliability, sensitivity and the use length of detector.
Description of drawings
The utility model is described in further detail below in conjunction with drawings and Examples.
Fig. 1, structural representation of the present utility model
The structural representation of Fig. 2, embodiment of the present utility model two
The schematic cross-section of Fig. 3, embodiment of the present utility model two
The structural representation of Fig. 4, embodiment of the present utility model three
The schematic cross-section of Fig. 5, embodiment of the present utility model three
The structural representation of Fig. 6, embodiment of the present utility model four
The schematic cross-section of Fig. 7, embodiment of the present utility model four
The structural representation of Fig. 8, embodiment of the present utility model five
The schematic cross-section of Fig. 9, embodiment of the present utility model five
Embodiment
Referring to Fig. 1, analog linear temperature-sensing fire detecting cable of the present utility model, a detection line body 1 that can produce the series impedance signal is arranged, the signal output terminal A and the B that can be connected with the resistance signal measurement mechanism is equipped with at these detection line body two ends respectively, this detection line body middle part is provided with a plurality of thermistor R, and described a plurality of thermistors are connected in series successively.In the present embodiment; the length of surveying the line body can be designed to 50 meters-200 meters; wherein thermistor is separately independently; its length can be designed to 0.5 meter-1 meter; the quantity of thermistor can be designed as 50 to 200; connect by conductor between the thermistor, ways of connecting can be that welding or machinery cooperate crimping or conductive adhesive, surveys the external protective seam (not showing among the figure) that installs additional of line.This thermistor can be selected a kind of (being negative temperature coefficient resister, positive temperature coefficient resistor or critical temperature characteristic resistance) in NTC type, PTC type or the CTR type for use.The utility model should be installed together with a resistance signal pick-up unit when using, because this resistance signal pick-up unit and connected mode are routine techniquess, is not elaborated at this.When being heated for a certain section in the described detection cable, rising along with temperature, the resistance decline (when thermistor is NTC type or CTR type) of the thermistor in this detection cable, perhaps rise (when thermistor is the PTC type), the all-in resistance that causes thus surveying between signal output terminal A, the B at line body two ends descends or rises, and changes the variation of other parameter that causes or the big secret information fire alarm of rate of change according to this all-in resistance or by all-in resistance.
In the utility model, the thermistor in the described detection cable can be that the thermistor of NTC characteristic is (as MF series negative tempperature coefficient thermistor, or by NiO, CoO, Al
2O
3, the ceramic thermal resistance that forms of material sintering such as SiC, BaTiO3, or the organic polymer thermistor that constitutes by the conductivity type polymer substance), the thermistor that also can be ptc characteristics is (as MZ series posistor, or form by sintering such as stupalith BaTiO3, or the compound organic polymer thermistor that constitutes by conducting metal or carbon black), can also be that CTR (critical temperature characteristic) thermistor is (by V
2O
5, P
2O
5, SiO
2The ceramic thermal resistance that forms Deng sintering).The normal temperature resistance of single thermistor can be chosen in 0.1 Ω～1000M Ω scope.The form of thermistor can be a plug-in type resistance, or SMD resistance, or the miniature thermistor that is generated by burn into photoetching, sintering.
Referring to Fig. 2, embodiment two shown in Figure 3, (Fig. 2 is for surveying the longitudinal profile of cable, and Fig. 3 is the sectional view of Fig. 2).Present embodiment is the improvement on the foregoing description one basis, and in the present embodiment, an end of described detection line body 2 is electrically connected isometric with this detection line body and a be set up in parallel signal transmssion line 3, and the other end is signal output terminal A.Terminating resistor RZ of series connection on the described signal transmssion line, the other end of this signal transmssion line is signal output terminal C.Survey between line body and the signal transmssion line insulation course 4 is set.The thickness of insulation course can be chosen in 0.03 millimeter～10 millimeters scope.Signal transmssion line can be a conductor, survey line body and the signal transmssion line other parts except electric connection point and keep insulation, the resistance of terminating resistor RZ is chosen between 0～500M Ω, is used to detect short circuit and the open circuit fault of surveying cable, belongs to routine techniques.Present embodiment should be installed together with a resistance signal pick-up unit when using, because this resistance signal pick-up unit and connected mode are routine techniquess, is not elaborated at this.
In the present embodiment, surveying line body and signal transmssion line can be set up in parallel, and also can adopt the mode of mutual winding to be provided with, or adopts coaxial cable version, when adopting coaxial cable version, surveys the line body and is sleeved on the signal transmssion line outside.
Detecting conductor described in the utility model and insulator are relative conductor and relative insulator, can be with the ratio of the resistivity of normal temperature lower insulator and the resistivity of conductor greater than 10
8Define the difference of detecting conductor and insulator.
Referring to Fig. 4, embodiment three shown in Figure 5, (Fig. 4 is for surveying the longitudinal profile of cable, and Fig. 5 is the sectional view of Fig. 4).Present embodiment is the improvement on embodiment two bases, and in the present embodiment, an end of described detection line body 5 is electrically connected isometric with this detection line body and a be set up in parallel signal transmssion line 6, and the other end is signal output terminal A.Terminating resistor RZ of series connection is provided with an insulation course 7 on this signal transmssion line between described detection line body and the described signal transmssion line.Signal transmssion line can be a conductor, surveys line body and the signal transmssion line other parts except electric connection point and keeps insulation, and the resistance of terminating resistor RZ is chosen between 0～500M Ω, is used to detect short circuit and the open circuit fault of surveying cable.Described detection line body and described signal transmssion line are coated in the insulating sheath 8.This insulating sheath will be surveyed cable and external insulation.In addition, the signal transmssion line in the present embodiment also can be the lead of being made by thermo-sensitive material, and this lead can adopt a kind of in NTC, PTC, the CTR thermo-sensitive material.Present embodiment should be installed together with a resistance signal pick-up unit when using, because this resistance signal pick-up unit and connected mode are routine techniquess, is not elaborated at this.
Referring to Fig. 6, embodiment four shown in Figure 7, (Fig. 6 is for surveying the longitudinal profile of cable, and Fig. 7 is the sectional view of Fig. 6).Present embodiment is the improvement on embodiment two bases, in the present embodiment, an insulation course is set between described detection line body and the described signal transmssion line, constitutes to survey cable G.Be set up in parallel a detection cable F with surveying cable G, constitute the complex probe cable.Described detection cable F is made of 12,13 and negative temperature coefficient feature barrier layers 14 of detecting conductor of two pairings, described negative temperature coefficient feature barrier layer is arranged between the detecting conductor of described two pairings, is respectively equipped with signal output terminal D, E on two detecting conductors.Described negative temperature coefficient feature barrier layer is by polyacetylene, polyaniline, polythiophene, gathers a kind of the making in the macromolecular material that the phthalein mountain valley with clumps of trees and bamboo is main conductive materials.The thickness of this barrier layer can be selected for use in 0.1 millimeter-5 millimeters scope.In surveying cable G, an end of described detection line body 9 is electrically connected isometric with this detection line body and a be set up in parallel signal transmssion line 10, terminating resistor RZ of series connection on this signal transmssion line, and the other end of this signal transmssion line is signal output terminal C.An insulation course 11 is set between described detection line body and the described signal transmssion line.Signal transmssion line can be a conductor, surveys line body and the signal transmssion line other parts except electric connection point and keeps insulation, and the resistance of terminating resistor RZ is chosen between 0～500M Ω, is used to detect short circuit and the open circuit fault of surveying cable.Employed detecting conductor can be selected a kind of in hollow pipe-type conductor, solid linear conductor or the metal fibre knitted conductor for use in the present embodiment.Present embodiment should be installed together with a resistance signal pick-up unit when using, because this resistance signal pick-up unit and connected mode are routine techniquess, is not elaborated at this.
In the present embodiment, two kinds survey cables except as the mode of Fig. 7 places side by side, can also be placed on and survey cable G right side surveying cable F, the setting that can fit together of two kinds of detection cables, also can separate 0.1～3 meter spacing and place, constitute composite line type temperature sensing and survey cable.When temperature raises, survey the resistance decline (when thermistor is NTC type or CTR type) between signal output terminal A, the C among the cable G, the resistance of surveying between signal output terminal D, the E among the cable F descends, and the variation of other parameter that causes according to the above-mentioned two groups resistance values of surveying cables or by resistance value or the size of rate of change are reported a fire.
Referring to Fig. 8, embodiment five shown in Figure 9, (Fig. 8 is for surveying the longitudinal profile of cable, and Fig. 9 is the sectional view of Fig. 8).Present embodiment is the improvement on the basis of embodiment two, in the present embodiment, between described detection line body 15 and the described signal transmssion line 16 insulation course 17 is set, and constitutes to survey cable G.Dispose isometric with this signal transmssion line and a mate detecting conductor 18 side by side with described signal transmssion line, a negative temperature coefficient feature barrier layer 19 is set between this signal transmssion line and the detecting conductor, constitute and survey cable F.Survey cable G and survey the shared bars transmission line of cable F, thus, constitute the complex probe cable of another kind of form.Described detection cable F is made of detecting conductor 18 and signal transmssion line 16 pairings, and described negative temperature coefficient feature barrier layer is arranged between the detecting conductor of described two pairings, is respectively equipped with signal output terminal D, C on two detecting conductors.Described negative temperature coefficient feature barrier layer is by polyacetylene, polyaniline, polythiophene, gathers a kind of the making in the macromolecular material that the phthalein mountain valley with clumps of trees and bamboo is main conductive materials.In surveying cable G, an end of described detection line body 15 is electrically connected isometric with this detection line body and a be set up in parallel signal transmssion line, and the other end is signal output terminal A.Terminating resistor RZ of series connection on the signal transmssion line, the resistance of terminating resistor is chosen between 0～500M Ω, is used to detect short circuit and the open circuit fault of surveying cable.Survey line body and the signal transmssion line other parts except electric connection point and keep insulation, present embodiment should be installed together with a resistance signal pick-up unit when using, because this resistance signal pick-up unit and connected mode are routine techniquess, are not elaborated at this.
Claims (5)
1, a kind of discrete thermistor tandem analog linear temperature-sensing fire detecting cable, it is characterized in that: a detection line body that can produce the series impedance signal is arranged, the signal output terminal that can be connected with the resistance signal measurement mechanism is equipped with at these detection line body two ends respectively, this detection line body middle part is provided with a plurality of thermistors, and described a plurality of thermistors are connected in series successively.
2, analog linear temperature-sensing fire detecting cable according to claim 1, it is characterized in that: described detection line body one end is electrically connected isometric with this detection line body and a be set up in parallel signal transmssion line, terminating resistor of series connection is provided with an insulation course on this signal transmssion line between described detection line body and the described signal transmssion line.
3, analog linear temperature-sensing fire detecting cable according to claim 2 is characterized in that: described detection line body and described signal transmssion line are coated in the insulating sheath.
4, analog linear temperature-sensing fire detecting cable according to claim 2 is characterized in that: an insulation course is set between described detection line body and the described signal transmssion line, constitutes and survey cable G; Be set up in parallel a detection cable F with surveying cable G, constitute the complex probe cable; Described detection cable F is made of detecting conductor and a negative temperature coefficient feature barrier layer of two pairings, and described negative temperature coefficient feature barrier layer is arranged between the detecting conductor of described two pairings.
5, analog linear temperature-sensing fire detecting cable according to claim 2 is characterized in that: an insulation course is set between described detection line body and the described signal transmssion line, constitutes and survey cable G; Dispose isometric with this signal transmssion line and a mate detecting conductor side by side with described signal transmssion line, a negative temperature coefficient feature barrier layer is set between this signal transmssion line and the detecting conductor, constitute and survey cable F.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520119066 CN2824171Y (en) | 2005-09-16 | 2005-09-16 | Discrete thermistor series analog quantity line type temp sensing fire detecting cable |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520119066 CN2824171Y (en) | 2005-09-16 | 2005-09-16 | Discrete thermistor series analog quantity line type temp sensing fire detecting cable |
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| CN2824171Y true CN2824171Y (en) | 2006-10-04 |
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| CN 200520119066 Expired - Fee Related CN2824171Y (en) | 2005-09-16 | 2005-09-16 | Discrete thermistor series analog quantity line type temp sensing fire detecting cable |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102034573B (en) * | 2009-09-28 | 2012-07-18 | 重庆仪表材料研究所 | Dynamic hot spot type surface thermocouple temperature alarming thermosensitive cable |
| CN103630255A (en) * | 2012-08-21 | 2014-03-12 | 中国电信股份有限公司 | A system for carrying out on-line monitoring on the temperatures of capacitors of an uninterrupted power supply in an operation state |
| CN105444906A (en) * | 2015-11-23 | 2016-03-30 | 惠州学院 | High-sensitivity temperature sensor |
| CN107680316A (en) * | 2016-08-02 | 2018-02-09 | 青岛中阳消防科技股份有限公司 | A kind of more detection circuit line-type heat detectors based on series thermal-sensitive resistive element |
| CN113934973A (en) * | 2021-09-24 | 2022-01-14 | 国网江苏省电力有限公司检修分公司 | Temperature-sensitive cable state analysis method, device and system based on temperature resistance characteristic |
-
2005
- 2005-09-16 CN CN 200520119066 patent/CN2824171Y/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102034573B (en) * | 2009-09-28 | 2012-07-18 | 重庆仪表材料研究所 | Dynamic hot spot type surface thermocouple temperature alarming thermosensitive cable |
| CN103630255A (en) * | 2012-08-21 | 2014-03-12 | 中国电信股份有限公司 | A system for carrying out on-line monitoring on the temperatures of capacitors of an uninterrupted power supply in an operation state |
| CN103630255B (en) * | 2012-08-21 | 2016-12-21 | 中国电信股份有限公司 | Capacitance temperature to operating uninterrupted power source carries out the system of on-line monitoring |
| CN105444906A (en) * | 2015-11-23 | 2016-03-30 | 惠州学院 | High-sensitivity temperature sensor |
| CN105444906B (en) * | 2015-11-23 | 2019-04-12 | 惠州学院 | High-sensitivity temperature sensor |
| CN107680316A (en) * | 2016-08-02 | 2018-02-09 | 青岛中阳消防科技股份有限公司 | A kind of more detection circuit line-type heat detectors based on series thermal-sensitive resistive element |
| CN113934973A (en) * | 2021-09-24 | 2022-01-14 | 国网江苏省电力有限公司检修分公司 | Temperature-sensitive cable state analysis method, device and system based on temperature resistance characteristic |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: SHOU AN INDUSTRY FIRE LTD. Free format text: FORMER OWNER: ZHANG WEISHE; PATENTEE Effective date: 20080627 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20080627 Address after: Beijing City, the Capital Airport South Industrial Zone Banbidian Lee Road No. 22, zip code: 101304 Patentee after: Sureland Industry Fire-Fighting Co., Ltd. Address before: BeiJing Capital Airport South Industrial Zone Banbidian Lee Road No. 22, zip code: 101304 Co-patentee before: Li Gangjin Patentee before: Zhang Wei |
|
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |