CN201489635U - Compound restorable linear heat detection cable - Google Patents
Compound restorable linear heat detection cable Download PDFInfo
- Publication number
- CN201489635U CN201489635U CN2009201765221U CN200920176522U CN201489635U CN 201489635 U CN201489635 U CN 201489635U CN 2009201765221 U CN2009201765221 U CN 2009201765221U CN 200920176522 U CN200920176522 U CN 200920176522U CN 201489635 U CN201489635 U CN 201489635U
- Authority
- CN
- China
- Prior art keywords
- conductors
- line body
- detection line
- sensitive
- temperature
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Landscapes
- Fire-Detection Mechanisms (AREA)
Abstract
The utility model relates to a compound restorable linear heat detection cable, which consists of a set of detection cable bodies A capable of generating series impedance signals and a set of detection cable bodies B capable of generating parallel impedance signals. The detection cable bodies A comprise two conductors, wherein one end of the conductor is in short circuit connection with one end of the other conductor, while the other end of the conductor and the other end of the other conductor access an electric signal detection device simultaneously; and the detection cable bodies B comprise two conductors, wherein one end of the conductor and one end of the other conductor are connected in series with at least one terminal resistor, while the other end of the conductor and the other end of the other conductor access the signal detection device simultaneously. The compound restorable linear heat detection cable not only solves the problems that the conventional heat detection cable cannot meet requirement of detecting a local fire and a large-scale fire simultaneously, and is easy to generate an incorrect warning or fails to warn in service, but also improves the sensibility and reliability.
Description
Technical field
The utility model relates to combined type and can recover line type temperature-sensitive and survey cable, and this detection cable can produce the detection line body A of series impedance signal by one group and detection line body B that one group can produce the parallel impedance signal constitutes jointly.Solved existing heat detection cable and can not satisfy the demand that detects local fire and large-range fire disaster simultaneously, very easily produced the problem of reporting by mistake or failing to report in actual use, and improved sensitivity and reliability.
Background technology
Can recover line type temperature-sensitive detection cable is a kind of disaster detection cable that fire protection sector generally adopts, and the recovered line type temperature-sensitive detection cable that uses at present can be divided into two kinds by the principle of work difference:
First kind is the thermosensitive temperature-sensing cable that can produce the series impedance signal, referring to Fig. 1.This temperature-sensitive cable is made of temperature-sensitive alloy wire 1 and oversheath 2.Wherein the resistance value of temperature-sensitive alloy wire and environment temperature are positive temperature linearity characteristic.The temperature difference of different sections makes the resistance value difference of different section temperature-sensitive alloy wires.The all-in resistance equivalence of temperature-sensitive alloy wire is the series connection of the resistance of each section temperature-sensitive alloy wire.By inserting constant current source, can measure the voltage of temperature-sensitive alloy wire, after corresponding conversion, can intuitively reflect the medial temperature and the temperature rise rate at protected scene.When scene temperature or temperature rise rate surpass preset value, can send fire alarm signal.The advantage of this temperature-sensitive cable is: intuitively reflect on-the-spot medial temperature, fire prevention is played good effect; Because the fire early period of origination, it not is a lot of that temperature rises in addition, but that temperature rise rate is bound to is very big, therefore reports to the police by temperature rise rate and more can in time find the condition of a fire.Its major defect is that the portion fire reflection of playing a game of this temperature-sensitive cable is sensitive inadequately.
Second kind is the temperature-sensitive cable that can produce the parallel impedance signal, adopts coaxial cable structure usually, referring to Fig. 2.This temperature-sensitive cable is made of conductor 3, insulation course 4, metal knitted screen layer 5 and oversheath 6.Wherein insulation course adopts the insulating material of polyolefins high molecular polymer to make, and its insulation resistance is negative temperature coefficient feature.When being the environment temperature rising, insulation resistance will descend.The temperature difference of different sections makes the insulating resistance value difference of different section temperature-sensitive cables.Total insulation resistance equivalence of temperature-sensitive cable is the parallel connection of the insulation resistance of each section temperature-sensitive cable.By the circuit of wheatstone bridge one class, variation that can measurement insulation resistance when variable quantity surpasses preset value, can be sent fire alarm signal.The advantage of this temperature-sensitive cable is: when the part of temperature-sensitive cable (as 1 meter) when temperature is elevated to certain limit, obvious variation all can take place in the insulation resistance of temperature-sensitive cable, behind preliminary setting parameter, can send fire alarm signal.Its major defect is that the insulation resistance and the heating temperature of this temperature-sensitive cable and the length of being heated all have relation; identical as 1 meter long insulation resistance 70 ℃ the time with 200 meters long numerical value during at 38 ℃; thereby as satisfying the demand of local detection, all might false alarm under home.
From above-mentioned analysis result as can be seen, the existing temperature-sensitive cable that can produce the series impedance signal respectively has relative merits with the temperature-sensitive cable that can produce the parallel impedance signal.The former is applicable to that large-range fire disaster detects, and the latter is applicable to local fire detection.But these two kinds of temperature-sensitive cables all can not satisfy the demand that detects local fire and large-range fire disaster simultaneously, very easily produce in actual use and report by mistake or fail to report.Therefore, need to propose a kind of combined type and can recover line type temperature-sensitive detection cable, satisfy the needs of various different occasions.
Summary of the invention
The purpose of this utility model is to provide combined type can recover line type temperature-sensitive and surveys cable, and this detection cable can satisfy the demand that detects local fire and large-range fire disaster simultaneously, and highly sensitive, reliability is high, can significantly reduce rate of false alarm and rate of failing to report.
The purpose of this utility model realizes by following technical proposals:
Combined type can be recovered line type temperature-sensitive and survey cable, it is characterized in that: can produce the detection line body A of series impedance signal and detection line body B that one group can produce the parallel impedance signal forms by one group; Described detection line body A is made by two conductors, have at least one to be the temperature-sensitive alloy wire in two conductors of detection line body A, be provided with insulation course between two conductors, the mutual short circuit of an end of two conductors, the other end of two conductors inserts the electric signal measurement device simultaneously; Described detection line body B is made by two conductors, be provided with the insulation course of band negative temperature coefficient feature between two conductors of detection line body B, a conductor in two conductors is insulated layer parcel, another root conductor is screen layer and is coated on outside the insulation course, two conductors and insulation course are coaxial cable structure, one end of two conductors is in series with at least one terminal resistance, inserts the electric signal measurement device in the time of the other end of two conductors.
Two conductors of described detection line body A are parastate, and the outside surface of two conductors is provided with a common insulation course.
The outside surface of two conductors of described detection line body A is respectively arranged with insulation course, is insulated layer two conductor that wraps up respectively and is parastate or twisted state.
The screen layer of described detection line body B is coated with insulating sheath.
Described detection line body A and detection line body B are parastate.
Described detection line body A and detection line body B are co-located in the insulating sheath.
Compared with the prior art the utility model has following advantage:
Series impedance signal and parallel impedance signal can be gathered simultaneously, the demand that detects local fire and large-range fire disaster simultaneously can be satisfied;
When judging fire, can analysis-by-synthesis series impedance signal and parallel impedance signal, can significantly reduce rate of false alarm and rate of failing to report;
The utility model is connected with the signal input part of electric signal measurement device, can different alarm parameters be set according to the environment difference, has improved sensitivity and reliability;
The utility model is after warning, and along with the condition of a fire is removed, after environment temperature is recovered, the resistance of surveying cable will automatically restore to initial value, reach reusable purpose.
Description of drawings
Fig. 1 is the thermosensitive temperature-sensing cable structure synoptic diagram of traditional produced series impedance signal
Fig. 2 is the temp.-sensing wire cable structure synoptic diagram of traditional produced parallel impedance signal
Fig. 3 is a structural representation of the present utility model
Fig. 4 is second kind of the present utility model and implements structural representation
Fig. 5 is that of the present utility model the third implemented structural representation
Embodiment
Shown in Fig. 3-5, combined type can be recovered line type temperature-sensitive and survey cable, can produce the detection line body A of series impedance signal and detection line body B that one group can produce the parallel impedance signal forms by one group; Described detection line body A is made by two conductors 7,8, have at least one to be the temperature-sensitive alloy wire in described two conductors 7,8, perhaps two conductors 7,8 all are the temperature-sensitive alloy wires, be provided with insulation course between two conductors 7,8, the mutual short circuit of one end of two conductors 7,8, the other end of two conductors 7,8 inserts electric signal measurement device 11 simultaneously; Described detection line body B is made by two conductors 12,13, be provided with the insulation course 14 of being with negative temperature coefficient feature between two conductors 12,13, a conductor 12 in two conductors is insulated layer 14 parcel, another root conductor 13 is screen layer and is coated on outside the insulation course 14, two conductors 12,13 and insulation course 14 are coaxial cable structure, when being in series with the other end of 16, two conductors of at least one terminal resistance 12,13, one end of two conductors 12,13 inserts electric signal measurement device 11.
Two conductors of described detection line body A are parastate, and the outside surface of two conductors 7,8 is provided with a common insulation course 20.
The outside surface of two conductors 7,8 of described detection line body A is respectively arranged with insulation course 9,10, is insulated layer 9,10 two conductor 7,8 that wraps up respectively and is parastate or twisted state.
The screen layer 13 of described detection line body B is coated with insulating sheath 15.
Described detection line body A and detection line body B are parastate.
Described detection line body A and detection line body B are co-located in the insulating sheath 17.
In the utility model, the electric signal measurement device is measured the voltage of surveying line body A and total insulating resistance value of surveying line body B in real time.When described detection cable local heating to a certain degree the time, total insulating resistance value of surveying line body B will drop to alarm setting value and the magnitude of voltage of surveying line body A does not have significant change, the electric signal measurement device will send fire alarm signal this moment; When described detection cable is heated to a certain degree on a large scale, total insulating resistance value of surveying line body B will drop to alarm setting value and magnitude of voltage or the magnitude of voltage rate of change of surveying line body A will be elevated to alarm setting value, and this moment, the electric signal measurement device also can send fire alarm signal; Normally raise and work as the residing environment temperature of described detection cable, make when total insulating resistance value of surveying line body B drops to alarm setting value, the magnitude of voltage of detection line body A or magnitude of voltage rate of change will raise but not reach alarm setting value, and this moment, the electric signal measurement device can not send fire alarm signal.Thereby both realized detecting simultaneously the target of local fire and large-range fire disaster, and can not produce false alarm again because of the variation of Normal Environmental Temperature.
Claims (6)
1. combined type can be recovered line type temperature-sensitive and surveys cable, it is characterized in that: can produce the detection line body A of series impedance signal and detection line body B that one group can produce the parallel impedance signal forms by one group; Described detection line body A is made by two conductors, have at least one to be the temperature-sensitive alloy wire in two conductors of detection line body A, be provided with insulation course between two conductors, the mutual short circuit of an end of two conductors, the other end of two conductors inserts electric signal measurement device (11) simultaneously; Described detection line body B is made by two conductors, be provided with the insulation course (14) of band negative temperature coefficient feature between two conductors of detection line body B, conductor (12) in two conductors is insulated layer (14) parcel, another root conductor (13) is screen layer and is coated on outside the insulation course (14), two conductors and insulation course (14) are coaxial cable structure, one end of two conductors is in series with at least one terminal resistance (16), inserts electric signal measurement device (11) in the time of the other end of two conductors.
2. combined type according to claim 1 can be recovered line type temperature-sensitive and survey cable, and it is characterized in that: two conductors of described detection line body A are parastate, and the outside surface of two conductors is provided with a common insulation course (20).
3. combined type according to claim 2 can be recovered line type temperature-sensitive and survey cable, it is characterized in that: the outside surface of two conductors of described detection line body A is respectively arranged with insulation course (9) and insulation course (10), is insulated two conductors that layer (9), insulation course (10) wrap up respectively and is parastate or twisted state.
4. can recover line type temperature-sensitive detection cable according to claim 1 or 3 described combined types, it is characterized in that: the screen layer (13) of described detection line body B is coated with insulating sheath (15).
5. combined type according to claim 1 can be recovered line type temperature-sensitive and survey cable, it is characterized in that: described detection line body A and detection line body B are parastate.
6. combined type can be recovered line type temperature-sensitive detection cable according to claim 1 or 5, it is characterized in that: described detection line body A and detection line body B are co-located in the insulating sheath (17).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201765221U CN201489635U (en) | 2009-08-31 | 2009-08-31 | Compound restorable linear heat detection cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201765221U CN201489635U (en) | 2009-08-31 | 2009-08-31 | Compound restorable linear heat detection cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201489635U true CN201489635U (en) | 2010-05-26 |
Family
ID=42428505
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009201765221U Expired - Lifetime CN201489635U (en) | 2009-08-31 | 2009-08-31 | Compound restorable linear heat detection cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201489635U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10488273B2 (en) | 2013-12-20 | 2019-11-26 | Leoni Kabel Holding Gmbh | Measuring arrangement and temperature-measuring method, and sensor cable for such a measuring arrangement |
-
2009
- 2009-08-31 CN CN2009201765221U patent/CN201489635U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10488273B2 (en) | 2013-12-20 | 2019-11-26 | Leoni Kabel Holding Gmbh | Measuring arrangement and temperature-measuring method, and sensor cable for such a measuring arrangement |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201138504Y (en) | Parallel line type temperature-sensing fire disaster detector with discrete temperature sensing switch serially connected with resistor | |
| CN101286263A (en) | Parallel single wire digital temperature sensor fire disaster detector and alarming method | |
| CN103065420A (en) | Unrecoverable cable-type linear heat fire detector and alarm method thereof | |
| CN104376678A (en) | Positioning type linear temperature sensing fire detector and alarm method thereof | |
| CN104574771A (en) | Combined type linear temperature-sensing fire detector and alarm method of combined type linear temperature-sensing fire detector | |
| CN101368850A (en) | Multi-temperature impedance characteristic sensing cable and temperature-sensitive detector using the same | |
| CN201489634U (en) | Combined recoverable line type temperature sensing detecting cable | |
| CN201489635U (en) | Compound restorable linear heat detection cable | |
| CN107545692B (en) | Unrecoverable cable type linear temperature-sensing fire disaster detector | |
| CN101251943A (en) | Series connecting fuse metal temperature-sensing circuit breaker type linear temperature-sensitive detector | |
| CN204331969U (en) | A kind of locate mode line-type heat detector | |
| CN101188038A (en) | A separated recoverable multi-level alarming linear temperature sensing detector | |
| CN201117046Y (en) | Composite type simulation quantity line-type temperature-sensing fire hazard detector | |
| CN202948536U (en) | Unrecoverable cable-type line style temperature-sensitive fire hazard detector | |
| CN201057569Y (en) | Digital quantity line-type heat detector based on bus technique | |
| CN201262774Y (en) | Linetype heat detector for multi-loop sectional monitoring temperature-sensing electrical signal | |
| CN206361806U (en) | A kind of multi-point temperature measurement control device | |
| CN100359304C (en) | Recombination line type temperature-sensing fire detector | |
| CN204406593U (en) | A kind of composite linear temperature-sensing fire disaster detector | |
| CN101685570A (en) | Restorable linear heat detector of normally open type rate-of-rise and fixed temperature switches connected in parallel | |
| CN104574768A (en) | Linear temperature-sensing fire detector and alarm method thereof | |
| CN201060532Y (en) | Combined temperature-sensitive fire disaster detector | |
| CN201465256U (en) | Linear temperature-sensing fire detecting device | |
| CN201069601Y (en) | Line temperature sensing fire detector based on resettable switch | |
| CN104198076A (en) | Multifunctional linear temperature sensor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20100526 |