CN201083553Y

CN201083553Y - Two-core structure switch signal, analog combined linear temperature-sensitive detector

Info

Publication number: CN201083553Y
Application number: CNU2007200118969U
Authority: CN
Inventors: 张陈
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-04-29
Filing date: 2007-04-29
Publication date: 2008-07-09
Anticipated expiration: 2017-04-29

Abstract

The utility model provides a twin core switching value and analog quantity combined cable thermal detector. The two ends of the thermal cable are respectively connected with a microcomputer modulator (8) and terminating resistors R1 and R2 as well as R3 to form a closed-circuit signal pickup circuit. The utility model is characterized in that the thermal cable has a structure which is as follows: two elastic metal conductors (1) are provided, one metal conductor is wrapped with a conducting material layer (5) or/and an insulation layer (2) with the Vicat softening point ranging from 40 DEG C to 180 DEG C outside and then is wrapped with a common terminal aluminum-plastic laminated band or a copper-plastic laminated band or a blocking foil or a conducting material layer (4); the other elastic metal conductor (1) is wrapped with a semi-conductor layer (3) and then is wrapped with an insulation layer (2) with the Vicat softening point ranging from 40 DEG C to 180 DEG C; two elastic metal conductors are intertwisted together by core of conductor of different clad, the intertwist pitch is preferred between 20 to 200 millimeters or one or more than one common terminal installation wire (7) is placed or intertwisted or bound, and then an outer sheath layer (6) and the common terminal installation wire are plastic extruding together. The product has high quality reliability and low cost as well as high thermal warning sensitivity, the use length is not limited, and the performance requirements of cable thermal detector GB 16280-2005 and the supplementary provision can be satisfied.

Description

A kind of switching value of two-chip structure, analog composite type line-type heat detector

Technical field

The present invention relates to a kind of cable linear temperature sensing warning device, a kind of switching value of two-chip structure, analog composite type line-type heat detector.

Technical background

Line-type heat detector of the prior art is a not fire detector widely of a kind of purposes, the present line-type heat detector that uses: constitute the quadrature arrangement heat detector by an on-off value linear heat fire detector and an analog linear temperature-sensing fire detecting device, referring to Fig. 1.Outside two conductors 11, coat 9, two conductors of NTC plastic layer respectively and twist together, coat fusible plastic layer 10 respectively outside other two elastic conductors 12 and twist together.Oversheath 14 is arranged outward, and the signal input part of resistance signal measurement mechanism 13 is connected with described conductor, be used to measure between described two conductors and two elastic conductors between resistance and short-circuit conditions.When detector cables was heated, its temperature rose thereupon, and at first the resistance of the NTC plastic layer 11 between two conductors descends, and when its resistance drops to a setting value, the resistance signal measurement mechanism will produce and export fire alarm for the first time; Then, when temperature reached higher degree, the meltable plastic layer took place softening or melts, and under the elastic force effect of elastic conductor, two conductors are in contact with one another, and the resistance signal that promptly is short-circuited, measurement mechanism will produce and export fire alarm for the second time.The advantage of this detector is: can export fire alarm twice.The shortcoming of this detector is: the alarm temperature that analog signals is provided with is relevant with environment temperature with use length, can not right judgement fire alarm temperature, and make the accuracy of this detector alarm temperature lower.

Summary of the invention

This novel purpose provides a kind of switching value, analog composite type line-type heat detector of two-chip structure, realizes that the switching value constant temperature is reported to the police, the function of the multistage warning of analog quantity temperature-sensitive.

A kind of switching value of two-chip structure, the analog composite type line-type heat detector, by the temperature sensing cable two ends respectively with microcomputer modulator 8 and terminal resistance R1, R2, R3 connects into the closed circuit signaling Acquisition Circuit, the structure that it is characterized in that temperature sensing cable: two elastic metallic conductors 1, wherein one outer to coat conductive material layer 5 and/or coat Vicat softening point be 40 ℃～180 ℃ insulation course 2, coat public pole aluminium-plastic tape or compound copper-plastics band or metal forming or conductive material layer 4 again, another root elastic metallic conductor 1 coats semiconductor layer 3, coats Vicat softening point again and be 40 ℃～180 ℃ insulation course 2; Two cores by clad inequality twist together, and its twisting pitch is preferred between 20mm～200mm, or again along putting or public pole stranded, that twine more than one or is installed lead 7, then extrusion molding external sheath layer 6 together.Aluminium-plastic tape or compound copper-plastics band, metal forming or conductive material layer are as public pole.The change in resistance amount that produces between two elastic metallic conductors of microcomputer modulator monitoring, the alerting signal that insulation material layer and semiconductor material layer are set in the microcomputer modulator internal memory starts the resistance amount, be from high to low and set a plurality of temperature grade alarming values in the resistance zone of linear change or nonlinearities change, realize the output of analog quantity constant temperature alerting signal, and utilize two short circuits between the elastic conductor, realize the output of switching value constant temperature alerting signal.

This is novel to be that a kind of switching value of two-chip structure, the outstanding advantage of analog composite type line-type heat detector are: because the designed construction of cable could realize that switching value signal output alarm and analog signals output alarm perfectly are combined in the tiny cable, and because two kinds of alerting signal outputs of switching value and analog quantity make line-type heat detector have higher security and reliability.Still can keep the cross-section of cable less although increased aluminium-plastic tape, compound copper-plastics band, metal forming or conductive material clad in the temperature sensing cable, and conductor is coated the high metal material layer of coefficient of heat conductivity, the temperature sensing cable external and internal compositions is heated simultaneously, and with heat rapidly conduction reach the alarm temperature value that sets, the fire response time is reported to the police more than 5 seconds at least in advance than prior art, for the incipient fire forecast gains time.

The constant temperature alarm temperature can be set at 60 ℃, 70 ℃, 85 ℃, 105 ℃, 138 ℃, the 180 ℃ a kind of alarm temperatures in six temperature grades; The analog quantity temperature-sensitive is reported to the police can be provided with alarm temperature arbitrarily between 60 ℃-138 ℃, be suitable for wider temperature range.The product quality reliability height, cost is low, and temperature-sensitive warning sensitivity height is not used length restriction, can satisfy the performance requirement of GB16280-2005 " line-type heat detector " and supplementary provision.

Description of drawings

Fig. 1 is the switching value/analog quantity composite line type temperature sensing fire detector synoptic diagram of traditional quadrature arrangement;

Fig. 2, Fig. 4, Fig. 6, Fig. 8 are switching value, analog composite type line-type heat detector example 1-example 4 cross-sectional view of two-chip structure;

Fig. 3, Fig. 5, Fig. 7, Fig. 9 are routine 1-example 4 structural representations;

Embodiment

A kind of switching value of two-chip structure, the analog composite type line-type heat detector, by the temperature sensing cable two ends respectively with microcomputer modulator and terminal resistance R1, R2, R3 is connected to form the closed circuit signaling Acquisition Circuit, the structure that it is characterized in that temperature sensing cable, example 1 is seen Fig. 2, Fig. 3: what it adopted is two elastic metallic conductors 1, wherein to coat Vicat softening point be 40 ℃～180 ℃ insulation material layer 2 to elastic metallic conductor 1, metallized aluminum plastic composite strip or compound copper-plastics band again, metal forming or conductive material layer 4, another root elastic metallic conductor 1 coats semiconductor layer 3, coats Vicat softening point again and be 40 ℃～180 ℃ insulation material layer 2.Two have the core of different clads to twist together, and its twisting pitch is preferred between 20mm～200mm, then extrusion molding external sheath layer 6 together.

There are the r connected mode in terminal resistance R1, R2 simultaneously with terminal resistance R3: two 1 of elastic metallic conductors are connected R1, R2, R3 are connected between aluminium-plastic tape or compound copper-plastics band, metal forming or conductive material layer 4 and R1, R2 again.When terminal resistance has only R1 and R2, R3 is substituted with lead.Equally, when terminal resistance had only R3, R1 and R2 substituted with lead and get final product.

Semiconductor layer 3 is by at least a making in described NTC characteristic or the CTR characteristic macromolecule polymer material.

Example 2 is seen Fig. 4 and Fig. 5, the structure that it is characterized in that above-mentioned temperature sensing cable can also be: wherein coat conductive layer 5 outside an elastic metallic conductor 1, coat Vicat softening point then and be 40 ℃～180 ℃ insulation material layer 2, coat public pole aluminium-plastic tape or compound copper-plastics band, metal forming or conductive material layer 4 again.

Example 3 is seen Fig. 6 and Fig. 7, the structure that it is characterized in that temperature sensing cable can also be: two have the core of different clads to twist together, its twisting pitch is preferred between 20mm～200mm, again along putting or public pole stranded, that twine more than one or is installed lead 7, extrusion molding external sheath layer 6 together at last.

Example 4 is seen Fig. 8 and Fig. 9, it is characterized in that temperature sensing cable structure that above-mentioned technical characterstic is combined: adopt two elastic metallic conductors 1, wherein one coats conductive material layer 5 outward, coat Vicat softening point then and be 40 ℃～180 ℃ insulation material layer 2, metallized aluminum plastic composite strip or compound copper-plastics band, metal forming or conductive material layer 4 again, another root elastic metallic conductor 1 is outer to coat semiconductor layer 3, coat Vicat softening point is 40 ℃～180 ℃ insulation material layer 2.Two cores by different clads twist together, and its twisting pitch is preferred between 20mm～200mm, again along putting or public pole stranded, that twine more than one or is installed lead 7, and extrusion molding external sheath layer 6 together then.

When temperature sensing cable when allowing to use high ambient temperature following, elastic metallic conductor 1 and aluminium-plastic tape or compound copper-plastics band, resistance between metal forming or the conductive material layer 4 is under the high-impedance state all the time, microcomputer modulator 8 detects less than two elastic metallic conductors 1 and aluminium-plastic tape or compound copper-plastics band, change in resistance between metal forming or the conductive material layer 4, when temperature sensing cable is heated, and when surpassing the Vicat softening point of insulation material layer 2 between two elastic metallic conductors 1, elastic metallic conductor 1 is under the elastic force effect, wherein elastic metallic conductor 1 and aluminium-plastic tape or compound copper-plastics band, metal forming or conductive material layer 4 are short-circuited, semiconductor clad 3 and the aluminium-plastic tape or the compound copper-plastics band of another root elastic metallic conductor 1, metal forming or conductive material layer 4 are short-circuited, by microcomputer modulator 8 output switching value and analog quantity alerting signals.

The thickness of NTC (negative temperature coefficient) characteristic macromolecule polymer material clad and CTR (critical value negative temperature coefficient) characteristic macromolecule polymer material clad is selected between 0.01～2.0mm.

Temperature raises, and resistivity can descend thereupon, between 25 ℃～150 ℃ (2～8 orders of magnitude descend).

Select the performance of insulating material to be: Vicat softening point is 40 ℃～180 ℃, and specific insulation is 10 ¹⁰～10 ¹⁸All plastics of Ω cm, elastomeric material.

PTC (positive temperature coefficient (PTC)) characteristic macromolecule polymer material is when the temperature rising, and resistivity can be a spy

Sudden change is risen in the fixed temperature scope, between 25 ℃～150 ℃ (2～6 orders of magnitude raise).

The thickness of aluminium-plastic tape or compound copper-plastics band or metal forming can be selected for use between 0.01～1.0mm.

Elastic metallic conductor 1 and public pole are installed conductor 7 line style cross section specifications and are selected for use between Φ 0.2～3.0mm.

The thickness of extrusion molding restrictive coating is selected between 0.1～2.0mm.

Claims

1. the switching value of a two-chip structure, the analog composite type line-type heat detector, by the temperature sensing cable two ends respectively with microcomputer modulator (8) and terminal resistance R1, R2, R3 connects into the closed circuit signaling Acquisition Circuit, the structure that it is characterized in that temperature sensing cable: two elastic metallic conductors (1), wherein one outer to coat conductive material layer (5) and/or coat Vicat softening point be 40 ℃～180 ℃ insulation course (2), coat public pole aluminium-plastic tape or compound copper-plastics band or metal forming or conductive material layer (4) again, another root elastic metallic conductor (1) coats semiconductor layer (3), coats Vicat softening point again and be 40 ℃～180 ℃ insulation course (2); Two cores by clad inequality twist together, and its twisting pitch is preferred between 20mm～200mm, or again along putting or public pole stranded, that twine more than one or is installed lead (7), then extrusion molding external sheath layer (6) together.

2. the switching value of two-chip structure according to claim 1, analog composite type line-type heat detector is characterized in that terminal resistance (R1), (R2), (R3) resistance value are preferred at 50 Ω～50M Ω; Terminal resistance (R1), (R2) and terminal resistance (R3) can exist simultaneously, or have only (3), or have only (R1) and (R2).