CN205541249U - Cable line type temperature -sensing fire detector - Google Patents
Cable line type temperature -sensing fire detector Download PDFInfo
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- CN205541249U CN205541249U CN201620281311.4U CN201620281311U CN205541249U CN 205541249 U CN205541249 U CN 205541249U CN 201620281311 U CN201620281311 U CN 201620281311U CN 205541249 U CN205541249 U CN 205541249U
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- metallic conductor
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Abstract
The utility model discloses a cable line type temperature -sensing fire detector, including temperature sensing part, signal processing unit, terminating resistance R1, R2, the temperature sensing parts are formed by the closed type temperature switch of a plurality of series connection, first, second and parallel setting of the 3rd metallic conductor, and wherein the large -space between the arbitrary adjacent closed type temperature switch who places is not more than 1 meter, signal processing unit includes the operation device to and the alarm output device and the two sets of electric signal measurement device that link to each other with the operation device, closed type temperature switch, R1 and a metallic conductor of a set of electric signal measurement device and a plurality of series connection are connected and form a measurement circuit, the 2nd measurement circuit of formation is connected with the 2nd metallic conductor, R2 and the 3rd metallic conductor to another electric signal measurement device of group, second, the 3rd metallic conductor cover NTC characteristic material layer outward, second, the outside NTC characteristic material layer laminating of the 3rd metallic conductor, and stability, reliability and sensitivity are high.
Description
Technical field
This utility model belongs to fire detecting and alarm technical field in safety engineering discipline, is specifically related to a kind of detection
Device.
Background technology
At present, the cable linear temperature sensing fire detector of prior art is widely used in industrial fire field.It mainly has
Switching value cable linear temperature sensing fire detector, analog quantity cable linear temperature sensing fire detector, multipoint mode cable linear sense
Warm fire fire detector, distributed linear optical fiber heat fire detector, fiber Bragg grating type line-type heat detector.On
Stating product in problem present in engineer applied is cannot to use after switching value cable linear temperature sensing fire detector is reported to the police, mould
Analog quantity cable linear temperature sensing fire detector is easily affected by ambient temperature and length of being heated, multipoint mode cable linear temperature sensing fire
There is the detection blind area between 2 sensing points, distributed line in fire detector and fiber Bragg grating type line-type heat detector
Type its sensitivity of temperature detected by optical fiber fire detector is relatively low, and current technical specification need to meet minimum probe unit length more than 3m.
Due to the existence of the problems referred to above, greatly limit the application model of the cable linear temperature sensing fire detector of prior art
Enclose.
Summary of the invention
Goal of the invention: in order to overcome the deficiencies in the prior art, the purpose of this utility model is to provide a kind of cable formula line
Sensing fire detector, has good stability, reliability and sensitivity.
Technical scheme: for solving above-mentioned technical problem, a kind of cable linear temperature sensing fire detector that this utility model provides,
Including temperature sensing part, signal processing unit, terminal resistance R1 and terminal resistance R2；
Described temperature sensing part is by the closed type temperature switch of multiple series connection, the first metallic conductor, the second metallic conductor and the 3rd
Metallic conductor arranges parallel and forms, and the maximum spacing between the closed type temperature switch that wherein arbitrary neighborhood is placed is not more than 1
Rice；Described signal processing unit includes arithmetic processing apparatus, and the alarm output device that is connected with arithmetic processing apparatus and
Two groups of electric signal measurement devices；
One of which electric signal measurement device and multiple closed type temperature switch, terminal resistance R1 and the first metals connected
Conductor connects formation the first measurement loop；Another group electric signal measurement device and the second metallic conductor, terminal resistance R2 and
3rd metallic conductor connects formation the second measurement loop；
NTC elastomeric material layer it is covered with, outside second, third metallic conductor described outside second, third metallic conductor described
NTC elastomeric material laminating close.
Preferably, insulation material layer or NTC elastomeric material layer it are coated with outside described first metallic conductor.
Preferably, described electric signal measurement device is to be connected with temperature sensing part, it is possible in real time temperature sensing part is carried out signal ginseng
The electric signal measurement device that number gathers；Described arithmetic processing apparatus, for the signal parameter gathered according to electric signal measurement device
Carry out the judgement of detector duty with the comparative result of predetermined threshold value and carry out the computing of fire alarm and fault alarm
Processing means.
As a kind of preferred version, the closed type temperature switch of multiple series connection in described temperature sensing part and first, second, the
Three metallic conductors are parallel be close to or be equidistantly twisted into one after, be cladded with insulating sheath and form the total cable of single temperature-sensitive.
As another kind of preferred version, the closed type temperature switch of multiple series connection in described temperature sensing part and the first metallic conductor
Parallel be close to or be equidistantly twisted into one after, be cladded with insulating sheath and form the first cable；Described temperature sensing part is arranged parallel
Second parallel with the 3rd metallic conductor be close to or be equidistantly twisted into one after, be cladded with insulating sheath and form the second cable.
It is further preferred that described first cable and the second cable is parallel be close to or be equidistantly twisted into one after be cladded with insulation and protect
Set forms the total cable of single temperature-sensitive.
Preferably, described first metallic conductor and the second metallic conductor are covered with the survey of NTC elastomeric material layer outside being same
Amount common port metallic conductor.
It is further preferred that the closed type temperature switch of parallel arrangement of multiple series connection in described temperature sensing part, measure public
End metallic conductor and the first metallic conductor parallel be close to or be equidistantly twisted into one after, be cladded with insulating sheath and form single temperature-sensitive
Total cable.
Preferably, often group electric signal measurement device includes front end circuit, filter circuit, amplifying circuit and A/D convertor circuit；
The input of described front end circuit is connected with temperature sensing part, be sequentially connected with after front end circuit filter circuit, amplifying circuit and
A/D convertor circuit, the output of described A/D convertor circuit is connected with arithmetic processing apparatus.
Beneficial effect: a kind of cable linear temperature sensing fire detector of the present utility model, its advantage is on the one hand to improve spy
Survey the stability of device and reliability, also improve sensitivity and multistage than single multipoint mode cable linear temperature sensing fire detector
The function reported to the police.
Accompanying drawing explanation
The overall structure schematic block diagram of the cable linear temperature sensing fire detector that Fig. 1 provides for embodiment 1；
Fig. 2 is longitudinal sectional structure schematic diagram of temperature sensing part in embodiment 2；
Fig. 3 is the horizontal sectional structure schematic diagram of temperature sensing part in embodiment 2.
Detailed description of the invention
Embodiment 1: as it is shown in figure 1, the present embodiment provide cable linear temperature sensing fire detector, including temperature sensing part,
Signal processing unit, terminal resistance R1 and terminal resistance R2.Described signal processing unit includes arithmetic processing apparatus, with
And the alarm output device that is connected with arithmetic processing apparatus and two groups of electric signal measurement devices.
Described temperature sensing part includes the closed type temperature switch of parallel arrangement of multiple series connection, the first metallic conductor, the second gold medal
Belong to conductor and the 3rd metallic conductor.I.e. temperature sensing part by the closed type temperature switch of multiple series connection, the first metallic conductor,
Two metallic conductors and the 3rd metallic conductor arrange parallel and form, between the closed type temperature switch that wherein arbitrary neighborhood is placed
Maximum spacing is not more than 1 meter.
Two groups of electric signal measurement devices are respectively first, second electric signal measurement device, wherein the first electric signal measurement device
Formation the first measurement loop it is connected with closed type temperature switch, terminal resistance R1 and first metallic conductor of multiple series connection；
Second electric signal measurement device and the second metallic conductor, terminal resistance R2 and the 3rd metallic conductor connect formation the second measurement
Loop.
It is covered with outside described first metallic conductor outside insulation material layer or NTC elastomeric material layer, second, third metallic conductor
Being covered with NTC elastomeric material layer, the NTC elastomeric material laminating outside second, third metallic conductor described closes.
Described electric signal measurement device is to be connected with temperature sensing part, it is possible in real time temperature sensing part is carried out signal parameter collection
Electric signal measurement device；Described arithmetic processing apparatus, for the signal parameter and the default threshold that gather according to electric signal measurement device
The comparative result of value carries out the judgement of detector duty and carries out the arithmetic processing apparatus of fire alarm and fault alarm.
In described temperature sensing part parallel arrangement of multiple series connection closed type temperature switch and the first metallic conductor is parallel is close to
Or after being equidistantly twisted into one, be cladded with insulating sheath and form the first cable；Parallel arrangement of second He in described temperature sensing part
3rd metallic conductor is parallel be close to or be equidistantly twisted into one after, be cladded with insulating sheath and form the second cable.
Described first cable and the second cable is parallel be close to or be equidistantly twisted into one after be cladded with insulating sheath and form single sense
The total cable of temperature.
Often group electric signal measurement device includes front end circuit, filter circuit, amplifying circuit and A/D convertor circuit；Before described
The input of circuits is connected with temperature sensing part, is sequentially connected with filter circuit, amplifying circuit and AD conversion after front end circuit
Circuit, the output of described A/D convertor circuit is connected with arithmetic processing apparatus.
In the present embodiment, the closed type temperature switch head end of multiple series connection and the first electric signal measurement device connect, end with
One end of terminal resistance R1 connects, and the head end of described first metallic conductor and the first electric signal measurement device connect, end
It is connected with the other end of terminal resistance R1；The head end of described second metallic conductor and the second electric signal measurement device connect,
End is connected with one end of terminal resistance R2, and the head end of described 3rd metallic conductor and the second electric signal measurement device connect,
End is connected with the other end of terminal resistance R2.
Embodiment 2: essentially identical with embodiment 1 structure, something in common is not repeated, except that:
First metallic conductor and the second metallic conductor are covered with the measurement common port metal of NTC elastomeric material layer outside being same
Conductor.I.e. in the present embodiment 2, as in figure 2 it is shown, described temperature sensing part includes parallel arrangement of multiple series connection closed type
Temperature switch the 1, first metallic conductor 2 and measurement common port metallic conductor 3, the closed type temperature that wherein arbitrary neighborhood is placed
Maximum spacing between degree switch is not more than 1 meter.
One of which electric signal measurement device and multiple closed type temperature switch 1, terminal resistance R1 connected and measure public
End metallic conductor 3 connects formation the first measurement loop；Another group electric signal measurement device with measure common port metallic conductor 3,
Terminal resistance R2 and the first metallic conductor 2 connect formation the second measurement loop.
As shown in Figures 2 and 3, it is covered with NTC spy outside described measurement common port metallic conductor 3 and the first metallic conductor 2
Property material layer 4, described the measures the NTC elastomeric material laminating outside common port metallic conductor 3 and the first metallic conductor 2
Close.
The closed type temperature switch 1 of parallel arrangement of multiple series connection, measurement common port metallic conductor 3 in described temperature sensing part
Parallel with the first metallic conductor 2 be close to or be equidistantly twisted into one after, be cladded with insulating sheath and form the total cable of single temperature-sensitive.
In the present embodiment, the head end of the closed type temperature switch of multiple series connection and the first electric signal measurement device connect, end
It is connected with one end of terminal resistance R1；The head end of described measurement common port metallic conductor 3 and first, second signal of telecommunication are surveyed
Amount device connects, and end is connected with the other end of terminal resistance R1 and one end of terminal resistance R2；Described first metal is led
The head end of body 2 and the second electric signal measurement device connect, and end is connected with the other end of terminal resistance R2.
As a example by embodiment 2, illustrate operation principle of the present utility model:
In the present embodiment 2, wherein the first electric signal measurement device is to the closed type temperature switch 1 of multiple series connection and one
The circuit that the metallic conductor (measuring common port metallic conductor 3) of outsourcing NTC elastomeric material is connected with terminal resistance R1 enters
Row signals collecting, to the metallic conductor of two outsourcing NTC elastomeric material, (wherein one is the second electric signal measurement device
Measuring common port metallic conductor 3, another root is the first metallic conductor 2) circuit that is connected with terminal resistance R2 carries out signal
Gather.And by gather two groups of data values send data processing equipment to, according to calculation process result carry out properly functioning,
Fire, the judgement of fault.When having fire alarm or fault alarm occurs, arithmetic processing apparatus starts alarm output device,
Specific works principle is as follows:
(1): after normal power supply, the first electric signal measurement device is to the closed type temperature switch 1 of multiple series connection and one
The circuit that the metallic conductor (measuring common port metallic conductor 3) of outsourcing NTC elastomeric material is connected with terminal resistance R1 enters
Row signals collecting, to the metallic conductor of two outsourcing NTC elastomeric material, (wherein one is the second electric signal measurement device
Measuring common port metallic conductor 3, another root is the 3rd metallic conductor 2) circuit that is connected with terminal resistance R2 carries out signal
Gather.Its resistance value collected is respectively R1 and R2 in theory.
(2): when cable linear temperature sensing parts short-circuit between conductors, open circuit, its two groups of electric signal measurement devices are gathered
The signal of telecommunication will change.When short circuit occurs, the termination resistance value of corresponding electric signal measurement device collection will be 0,
When line broken circuit occurs, the line terminal value that corresponding electric signal measurement device gathers is theoretically+∞, the most above-mentioned
Two kinds of situations occur, alarm output device output fault-signal.
During real work, refer to following determination methods:
(1) when the first electric signal measurement device circuit is short-circuited, its termination resistance value gathered is 0, then event occurs
Barrier；When the first electric signal measurement device circuit generation open circuit, its termination resistance value gathered is close+∞, sentences simultaneously
Whether disconnected second electric signal measurement device changes, as being not changed in or be not reaching to changing threshold relative to data before
During value, then it is judged to fault.
(2) when the second electric signal measurement device circuit is short-circuited, its termination resistance value gathered is 0；When the second electricity
During signal measurement apparatus circuit generation open circuit, its termination resistance value gathered is close+∞.
Above-mentioned situation occurs, alarm output device output fault-signal.
(3): when having big burning things which may cause a fire disaster to occur around temperature sensing part, i.e. burning things which may cause a fire disaster length is more than closed type temperature between adjacent series connection
During switch maximum spacing.Its two groups of electric signal measurement devices will change.When temperature reaches the threshold of closed type temperature switch
During value T (DW1), temperature switch is opened.The resistance that first measurement loop records will become close+∞ or have relative to R1 bright
Aobvious change.Another group electric signal measurement device is to two metallic conductor outsourcing NTC (negative temperature coefficient material) characteristics simultaneously
The measurement loop that is connected with terminal resistance R2 of material detect parallel resistance value R2 corresponding to T (DW1), this
Parallel resistance value R2 is significantly reduced relative to R2, and (these changes can use and preset the mode such as comparison of change threshold
Judge).When both meet simultaneously, alarm output device i.e. sends fire alarm signal.
When alarm settings threshold value T (DW2) is more than threshold value T (DW1) of temperature switch, open when temperature reaches closed type temperature
During threshold value T (DW1) closed, temperature switch is opened.Parallel resistance value between two metallic conductors is R2 simultaneously, this
Time software do not carry out any judgement, treat material and the end of two metallic conductor outsourcing NTC (negative temperature coefficient material) characteristics
The measurement loop that end resistance R2 connects detects parallel resistance value R2 corresponding to T (DW2) " time, i.e. achieve warning
Set the fire alarm of threshold value T (DW2) corresponding temperature.
(4): when having little burning things which may cause a fire disaster to occur around temperature sensing part, the least burning things which may cause a fire disaster length is less than closed type temperature between adjacent series connection
During the maximum spacing that degree switchs.One group electric signal measurement device is to the material of two metallic conductor outsourcing NTC characteristics and end
The measurement circuitry that end resistance R2 connects will be with the rising of temperature, changes.Once rate of change meets and exceeds
During rate temperature change threshold value Δ R (CW) set, alarm output device sends fire alarm signal.
What this utility model was protected is the structure of provided beyond-retrieve-type cable-type line-type heat fire detector.Above reality
Execute row and this utility model do not constituted restriction, relevant staff in the range of without departing from this utility model technological thought,
Carried out various changes and modifications, and all falls within protection domain of the present utility model.
Claims (9)
1. a cable linear temperature sensing fire detector, it is characterised in that: include temperature sensing part, signal processing unit,
Terminal resistance R1 and terminal resistance R2；
Described temperature sensing part is by the closed type temperature switch of multiple series connection, the first metallic conductor, the second metallic conductor and the 3rd
Metallic conductor arranges parallel and forms, and the maximum spacing between the closed type temperature switch that wherein arbitrary neighborhood is placed is not more than 1
Rice；Described signal processing unit includes arithmetic processing apparatus, and the alarm output device that is connected with arithmetic processing apparatus and
Two groups of electric signal measurement devices；
One of which electric signal measurement device and multiple closed type temperature switch, terminal resistance R1 and the first metals connected
Conductor connects formation the first measurement loop；Another group electric signal measurement device and the second metallic conductor, terminal resistance R2 and
3rd metallic conductor connects formation the second measurement loop；
NTC elastomeric material layer it is covered with, outside second, third metallic conductor described outside second, third metallic conductor described
NTC elastomeric material laminating close.
Cable linear temperature sensing fire detector the most according to claim 1, it is characterised in that: described first metal
Insulation material layer or NTC elastomeric material layer it is coated with outside conductor.
Cable linear temperature sensing fire detector the most according to claim 1, it is characterised in that:
Described electric signal measurement device is to be connected with temperature sensing part, it is possible in real time temperature sensing part is carried out signal parameter collection
Electric signal measurement device；
Described arithmetic processing apparatus, for the signal parameter gathered according to electric signal measurement device and the comparative result of predetermined threshold value
Carry out the judgement of detector duty and carry out the arithmetic processing apparatus of fire alarm and fault alarm.
Cable linear temperature sensing fire detector the most according to claim 2, it is characterised in that: described temperature sensing part
In the closed type temperature switch of multiple series connection and first, second, third metallic conductor is parallel is close to or is equidistantly twisted into one
After, it is cladded with insulating sheath and forms the total cable of single temperature-sensitive.
Cable linear temperature sensing fire detector the most according to claim 2, it is characterised in that: described temperature sensing part
In the closed type temperature switch of multiple series connection and the first metallic conductor is parallel be close to or be equidistantly twisted into one after, be cladded with insulation
Sheath forms First Line cable；In described temperature sensing part, parallel arrangement of second parallel with the 3rd metallic conductor be close to or equidistantly twist
After integrator, it is cladded with insulating sheath and forms the second cable.
Cable linear temperature sensing fire detector the most according to claim 5, it is characterised in that: described first cable
Parallel with the second cable be close to or be equidistantly twisted into one after be cladded with insulating sheath and form the total cable of single temperature-sensitive.
Cable linear temperature sensing fire detector the most according to claim 1, it is characterised in that: described first metal
Conductor and the second metallic conductor are covered with the measurement common port metallic conductor of NTC elastomeric material layer outside being same.
Cable linear temperature sensing fire detector the most according to claim 7, it is characterised in that: described temperature sensing part
In parallel arrangement of multiple series connection closed type temperature switch, measure common port metallic conductor and the first metallic conductor parallel tightly
After pasting or being equidistantly twisted into one, it is cladded with insulating sheath and forms the total cable of single temperature-sensitive.
Cable linear temperature sensing fire detector the most according to claim 1, it is characterised in that: often the group signal of telecommunication is surveyed
Amount device includes front end circuit, filter circuit, amplifying circuit and A/D convertor circuit；The input of described front end circuit with
Temperature sensing part connects, and is sequentially connected with filter circuit, amplifying circuit and A/D convertor circuit after front end circuit, and described AD turns
The output changing circuit is connected with arithmetic processing apparatus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620281311.4U CN205541249U (en) | 2016-04-06 | 2016-04-06 | Cable line type temperature -sensing fire detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620281311.4U CN205541249U (en) | 2016-04-06 | 2016-04-06 | Cable line type temperature -sensing fire detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205541249U true CN205541249U (en) | 2016-08-31 |
Family
ID=57141705
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620281311.4U Active CN205541249U (en) | 2016-04-06 | 2016-04-06 | Cable line type temperature -sensing fire detector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205541249U (en) |
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2016
- 2016-04-06 CN CN201620281311.4U patent/CN205541249U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Multifunctional cable linear temperature sensing fire detector Effective date of registration: 20190320 Granted publication date: 20160831 Pledgee: Bank of China Limited by Share Ltd Nanjing Liuhe sub branch Pledgor: JIANGSU ZHONGSHI ELECTRONICS CO., LTD. Registration number: 2019320000143 |
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| PE01 | Entry into force 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: 20191212 Granted publication date: 20160831 Pledgee: Bank of China Limited by Share Ltd Nanjing Liuhe sub branch Pledgor: JIANGSU ZHONGSHI ELECTRONICS CO., LTD. Registration number: 2019320000143 |
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| PC01 | Cancellation of the registration of the contract for pledge of patent right |