WO2008104105A1

WO2008104105A1 - A multifunctional linear cable temperature-sensing fire detector

Info

Publication number: WO2008104105A1
Application number: PCT/CN2007/000758
Authority: WO
Inventors: Chen Zhang; Wenjiang Wang
Original assignee: Chen Zhang; Wenjiang Wang
Priority date: 2007-02-27
Filing date: 2007-03-09
Publication date: 2008-09-04
Also published as: CN101017594A

Abstract

A multifunctional linear cable temperature-sensing fire detector, wherein both ends of the temperature-sensing cables connect to a resistance signal processing apparatus and a terminal box respectively so as to form a closed-circuit signal acquisition circuit, charactered in that a macromolecule polymer insulating material or PTC character macromolecule polymer material layer (22) and an NTC or CTR or semiconductor macromolecule polymer material or semiconductor belt interlayer (23) are provided between two elastic metal conductors (21) of the temperature-sensing cables, and two wires with envelope layers are intertwisted or twisted together, and squeeze-molded or wrapped by an insulating jacket (24) to form the temperature-sensing cable.

Description

Multifunctional cable type linear temperature fire detector

The invention relates to a fire alarm device, and a multi-functional cable type linear temperature fire detector. technical background

The linear type temperature-sensing fire detector in the prior art is a very widely used fire detector. The linear type temperature detectors currently used can be divided into five types according to the principle of operation - the first type is a switch type line type. The temperature detector, see Fig. 1, in the detector, there is an outer sheath 1 in which two (or three, four) elastic conductors 3 are twisted together, and a certain melting point is used outside the conductor. The plastic layer 2 is coated. When the temperature of the detector rises to soften or melt the plastic, under the elastic force of the elastic conductor, the conductors are in contact with each other, that is, a short circuit occurs, thereby achieving the purpose of reporting the fire. The advantages of this type of detector are: When the temperature at any point on the detector reaches the set alarm temperature, the detector can be short-circuited. The sensitivity of the detector alarm is independent of the length of the heat. Therefore, the object to be protected is partially overheated or fired. The detection sensitivity is very high. One of the disadvantages is that the short-circuit condition remains after the alarm. To continue the operation of the detector, the part of the detector that has been short-circuited by heat must be replaced. In order to increase the sensitivity of the line detector, the alarm temperature setting is usually lower, and the damaged cable is replaced more frequently. The second disadvantage is that there is only one alarm temperature setting value, only one fire alarm signal can be output, and no early warning signal can be issued for early fires.

The second type is an analog line type temperature sensor. The cable structure is the same as above. The difference is that the outer surface of each conductor is covered with conductive plastic of NTC characteristics (negative temperature coefficient characteristic). When heated, the temperature rises. The resistance between the NTC plastics is reduced, the degree of resistance reduction is temperature dependent (ie, the resistance is a measurable analog quantity), and the analog line type fixed temperature or differential temperature detector is the absolute value or rate of change of the measured resistance. . The disadvantages of this type of detector are: When the detector is heated and the temperature reaches a certain alarm temperature, the detector can predict the fire alarm. The alarm temperature is related to the length of the detector and the length of the heating. The longer the heating length, the lower the alarm temperature value. That is, the fire and alarm temperatures cannot be correctly judged, so that the accuracy of the alarm temperature of the detector is low. Advantages: Recoverable, the detector temperature reaches the fire temperature after the alarm, but does not exceed the temperature that is completely burned. After the temperature is lowered, the detector can continue to work.

The third type is an air line type temperature detector, see Fig. 2, in which there is a hollow metal tube 5. The two ends are provided with a plug 4, and one end thereof is provided with a pressure measuring interface 6. After the fire occurs, the metal pipe 5 is heated, and the internal air pressure changes, and the fire alarm is detected by measuring the absolute value or the change amount of the air pressure. The advantages and disadvantages of this type of detector are similar to those of analog line type temperature sensors. The fourth type of detector is a composite linear type temperature-sensing fire detector. See Figure 1 for the structure. The detector is twisted together by two (or three or four) elastic conductors, each of which is coated with the same meltable NTC plastic layer 7 respectively. When the detector is heated, the resistance drops, when its resistance When falling to a set value, the resistance signal measuring device will generate and output the first fire alarm signal; then, when the temperature rises, the meltable NTC plastic layer softens or melts, and under the elastic force of the elastic conductor, two When the conductors are in contact with each other, a short-circuit resistance signal occurs, and the measuring device generates and outputs a second fire alarm signal. The advantages and disadvantages of this detector are the same as the second one.

The fifth type consists of a switch-line type temperature-sensing fire detector and an analog-line type temperature-sensing fire detector, see Figure 3. The NTC plastic layer 7 is coated on the outside of the two conductors 3, and the two conductors are twisted together, and the other two elastic conductors 9 are respectively wrapped with the fusible plastic layer 10 to be twisted together. The outer outer sheath 1, the signal input end of the resistance signal measuring device 8 is connected to the conductor for measuring the resistance and short circuit between the two conductors and between the two elastic conductors. When the detector cable is heated, its temperature rises. First, the resistance of the NTC plastic layer 7 between the two conductors drops. When the resistance value drops to a set value, the resistance signal measuring device will generate and output the first fire alarm. Signal; Then, when the temperature reaches a higher level, the meltable plastic layer softens or melts. Under the elastic force of the elastic conductor, the two conductors are in contact with each other, that is, a short-circuit resistance signal occurs, and the measuring device generates and outputs a second Secondary fire alarm signal. The detector has the advantages of: It can output two fire alarm signals. The disadvantages of this detector are: The alarm temperature set by the analog signal is related to the length of use and the ambient temperature. The fire alarm temperature cannot be correctly judged, and the accuracy of the alarm temperature of the detector is low.

Based on the above analysis results, it can be seen that the switch quantity and the composite cable type linear temperature fire detector are irreversible, and the analog and air tube type line type heat detectors are recoverable. In the above-mentioned recoverable cable type linear temperature fire detector, the set alarm temperature is related to the heating length, the length of use and the ambient temperature of the temperature detector, and the actual heating temperature cannot be correctly determined. Therefore, The fixed alarm temperature value is inaccurate, which may cause false alarms or false alarms. Therefore, it is necessary to provide a recoverable cable type temperature fire detector that is not affected by the length of use and ambient temperature.

Summary of the invention

The object of the present invention is to provide a multi-functional cable type linear temperature fire detector, which realizes multi-level fixed temperature alarm, differential temperature alarm and real-time monitoring of the ambient temperature of the temperature sensing cable.

The multi-functional cable type linear temperature fire detector is formed by connecting the two ends of the temperature sensing cable to the resistance signal processing device and the terminal box respectively to form a closed circuit signal collecting circuit, wherein the two elastic metal conductors of the temperature sensing cable are disposed between Two different material barrier layers, high molecular polymer insulation or PTC The high molecular polymer material layer and the NTC or CTR high molecular polymer or the semiconductor high polymer material or the semiconductor strip barrier layer, and the two wires with the coating layer are twisted or entangled, and coated with a layer of aluminum After the plastic composite tape or the copper-plastic composite tape or the metal foil or the metal wire braiding layer, the temperature-sensitive cable is formed by extruding or wrapping an outer sheath; the resistance signal processing device monitors the temperature-sensitive cable because of different material coating layers. The amount of change in resistance between the two elastic metal conductors and the difference in the rate of temperature rise between the elastic metal conductor coated with the NTC or CTR characteristic polymer material and the coated aluminum-plastic composite layer, The alarm signal of the NTC or CTR characteristic polymer material layer is set in the signal processing device to start the resistance amount, and the temperature value alarm value and the heating rate resistance difference are set in the resistance region which changes linearly from high to low. Alarm value, and temperature monitoring of the temperature sensing cable use environment, realize switching quantity fixed temperature alarm signal output, analog quantity fixed temperature alarm signal output, differential temperature alarm signal output, cable use environment Real-time monitoring of the analog signal output of the change.

The outstanding advantage of the multi-functional cable type temperature-sensing fire detector of the invention is that the alarm temperature is not limited by the use length and the ambient temperature, and the temperature-sensing cable can be used for a length of up to 5,000 meters and the performance is unchanged. When the temperature sensing cable is allowed to use below the maximum ambient temperature, the resistance signal of the collected temperature sensing cable is always in the high-resistance insulation state, and the resistance value of the temperature sensing cable is only when the temperature exceeds the maximum ambient temperature allowed by the temperature sensing cable. On the basis of this, the resistance signal processing device judges the output alarm signal according to the temperature resistance value change, and can realize setting multiple temperature level alarms.

The key technology of the fire detector of the present invention is the structure of the temperature sensing cable, which uses a barrier layer provided with two different materials between the two elastic metal conductors. The temperature-sensitive cable is not allowed to be damaged under the highest ambient temperature, and the elastic polymer-coated polymer or PTC-based polymer material is not damaged. The elastic metal conductor cannot be exposed and cannot be characterized by coating NTC or CTR. When the coating of the molecular polymer material is in contact, the resistance signal processing device does not detect the resistance change signal of the high molecular polymer material covering the NTC or CTR characteristics. Therefore, the temperature sensing cable is below the maximum ambient temperature, the resistance between the two elastic metal conductors does not change significantly, and is always in a high-resistance insulation state, so the length of the temperature sensing cable is not limited. When the temperature sensing cable is heated and exceeds the maximum ambient temperature allowed by the temperature sensing cable, the same or different melting point polymer polymer insulation material or PTC characteristic polymer polymer insulation material is softened or melted under the elastic force of the elastic metal conductor. The elastic metal conductor covering the polymer polymer insulating material or the PTC characteristic polymer material is exposed, and the exposed elastic metal conductor is in contact with another coating layer covering the NTC or CTR characteristic high molecular polymer material. The NTC or CTR characteristic polymer material between the two elastic metal conductors of the temperature-sensitive cable is reduced in heat resistance value according to the resistance value, and is outputted to a set value according to the resistance value. The fire alarm signal, the degree of resistance reduction is related to the temperature of the temperature sensing cable. When the temperature sensing cable is heated but does not exceed the state of being completely burned, the resistance of the NTC or CTR characteristic polymer material between the two elastic metal conductors rises when the temperature returns to the temperature of the temperature sensing cable below the maximum ambient temperature. The temperature sensing cable is restored to normal operation.

When the cladding layer of the NTC or CTR characteristic polymer material is replaced with a semiconductor polymer material or a semiconductor tape coating layer, the performance of the temperature sensing cable is unrecoverable and constant temperature type.

The resistance signal processing device is provided with a plurality of resistance points corresponding to the temperature corresponding to the temperature and a resistance value difference corresponding to the temperature increase rate. When the temperature exceeds a set value, a constant temperature alarm signal is issued, and when the temperature rise rate exceeds one set When the resistance value is different, a differential temperature alarm signal is issued. The fixed temperature alarm temperature is 60 ° C, 70 ° C, 85 ° C, 105 ° C, 138 Ό five levels; and the alarm temperature can be arbitrarily set between 60 ° C and 138 ° C. Differential temperature alarm heating rate: 10 °C / min (20s ~ 140s response), 20 °C / min (22. 5s ~ 90s response), 30 °C / min (15s ~ 60s response), suitable for wider The temperature range is especially suitable for places where the fire temperature rises relatively fast. The whole temperature sensing cable is provided with a thermal resistance temperature measuring wire, which can monitor the ambient temperature in real time. The product can be reused multiple times and can be repeated at least 50 times. The product quality is high in reliability, low in cost, high in sensitivity to temperature sensing, and can meet the performance requirements of GB16280-2005 "Linear Temperature Detector" and supplementary provisions.

DRAWINGS

1 is a schematic structural view of a conventional first type of switching line type temperature sensing detector;

2 is a schematic structural view of a conventional third air line type temperature sensing detector;

3 is a schematic view of a conventional fifth-type switch-analog-combined line type temperature-sensing fire detector; FIG. 4 is a schematic structural view of a multi-functional cable type line-type fire detector according to the present invention; FIG. FIG. 6 is a schematic structural view of a multi-function cable type temperature-sensing fire detector of the present invention; FIG. 7 is a schematic diagram of a multi-functional cable type linear temperature fire detector of the present invention; FIG. 8 is a schematic structural view of a multi-functional cable type linear temperature fire detector according to the present invention; FIG. 9 is a schematic structural view of a multi-functional cable type linear temperature fire detector according to the present invention; 10-12 is a schematic structural view of an example 7-9 of a temperature sensitive fire detector having an auxiliary function according to the present invention;

Multi-functional cable type temperature sensitive fire detector, Example 1 is shown in Figure 4: The two ends of the temperature sensing cable are respectively connected with the resistance signal processing device and the terminal box to form a closed circuit resistance signal acquisition circuit, which is characterized by two temperature sensing cables. The root elastic metal conductor 21, by wrapping the strip or extruding, one of the conductors 21 The high molecular polymer insulating material or the PTC characteristic high molecular polymer material layer 22 is coated, and the other conductor 21 is coated with the NTC or CTR characteristic high molecular polymer material layer 23, and two wire bodies having different material coating layers. Stranded or entangled together, and then extruded or wrapped around an outer sheath 24 to form a recoverable temperature-sensing cable. According to the resistance performance of different material coating layers, an alarm signal of the NTC or CTR characteristic polymer material layer 23 is set in the memory of the resistance signal processing device to activate the resistance amount. Multiple alarm values can be set in the resistance range that varies linearly from high to low.

Characterization and ratio of materials and cladding materials used in the conductor cladding of the present invention -

1. NTC (negative temperature coefficient) characteristic polymer material:

Polymer main material: 100 parts of polyvinyl chloride resin.

Plasticizer: D0P (dioctyl phthalate) 20 parts, chlorinated paraffin 20 parts, DBP (di-n-butyl phthalate) 10 parts

Auxiliary: (antioxidant) bisphenol A 0. 2 parts,

Filling agent: calcium bicarbonate 10 parts

Stabilizer: Dibasic lead phosphite 5 parts

The above materials are prepared by mixing, kneading, kneading, tableting, and granulating.

As the temperature rises, the resistivity decreases, between 25 Ό and 150 ( (down 2 to 8 orders of magnitude).

2. CTR (Critical Negative Temperature Coefficient) Properties Polymer Materials:

Polymer main material: Polyvinyl chloride resin 100 parts

Plasticizer: DBP (di-n-butyl phthalate) 50 parts

Auxiliary agent. · (Antioxidant) 2246- S (also known as 4-methyl-6-tert-butylphenol) 0. 1 part

Filler: Calcium hydrogencarbonate 5 parts

Stabilizer: Dibasic lead phosphite 5 parts

Conductive powder: Conductive zinc oxide 20 parts

Conductive polymer material: polyethylene oxide 1 part

As the temperature rises, the resistivity decreases abruptly over a specific temperature range, between 25: and 150 ( (down 2 to 8 orders of magnitude).

3. Polymer insulation materials (general materials):

The properties of the polymer insulation insulating material are selected as follows: The volume resistivity is between 10 ^{16 and} 10 ¹⁸ Ω - cm, between 25 ° C and 85 ° C (resistivity. Always maintained at high resistance). 4. Semiconductor polymer materials:

Polymer main material: high density polyethylene 100 parts

Conductive powder: Conductive carbon black 30 parts

Antioxidant: 6-tert-butyl m-cresol (antioxidant 300) 0. 2 parts

The properties of the semiconductor polymer material selected are: a polymer material having a volume resistivity of 10 ⁹ Ω · cm or less.

5, PTC (Positive Temperature Coefficient) characteristics of polymer materials:

Polymer main material: PVDF (polyvinylidene fluoride) 50 parts

HDPF (High Density Polyethylene) 50 parts

Conductive powder: acetylene black 11 parts

When the temperature rises, the resistivity will decrease abruptly within a certain temperature range, between 25 ° C and 150 ° C (up to 2 to 6 orders of magnitude).

6, semiconductor tape material (universal materials):

The main material selection performance is a volume resistivity of 10 ⁹ Ω · cm or less.

Embodiment 2, the structure of the recoverable constant temperature temperature sensing cable is as shown in FIG. 5: two elastic metal conductors 21, one of which is covered with a polymer polymer insulating material or a PTC characteristic high molecular polymer material layer 22, and the other Coating NTC or CTR characteristic polymer material layer 23, and then coating a layer of polymer polymer insulation material or PTC characteristic polymer material layer 22, two wire bodies with different material coating layers, twisted They are entangled or entangled, and a temperature-sensitive cable is formed by extruding or wrapping an outer sheath 24.

Embodiment 3 The structure of the recoverable constant temperature temperature sensing cable is as shown in FIG. 6: two elastic metal conductors 21 respectively cover the NTC or CTR characteristic high molecular polymer material layer 23, and then respectively coated with a polymer insulating material. Or a PTC characteristic polymer material layer 22, two wire bodies having the same cladding layer, stranded or entangled together, and extruded or wrapped with an outer sheath 24 to form a temperature sensing cable.

Embodiment 4, the structure of the recoverable constant temperature temperature sensing cable is as shown in FIG. 7: the two elastic metal conductors 21 respectively cover the NTC or CTR characteristic high molecular polymer material layer 23, and are respectively coated with a layer of polymer polymer insulation. Material or PTC characteristic polymer material layer 22, and then separately coated with a layer of aluminum-plastic composite tape or copper-plastic composite tape or metal foil layer 25, two wire bodies with the same coating layer, stranded or wound Together, the outer sheath 24 is extruded or wrapped to form a temperature sensing cable; one of which covers the NTC or CTR characteristic polymer material layer 23 and the polymer polymer insulation material or the PTC characteristic polymer. The wire body of the polymer material layer 22 may also not be coated with an aluminum-plastic composite tape or a copper-plastic composite tape or metal foil layer 25. Embodiment 5 The recoverable differential temperature sensing temperature cable structure is as shown in FIG. 8: the root elastic metal conductor 21 covers the NTC or CTR characteristic high molecular polymer material layer 23, and the other elastic metal conductor 21 covers the polymer polymerization. Insulation material or PTC characteristic polymer material layer 22, two wire bodies with different coating layers, stranded or entangled, coated with aluminum-plastic composite tape or copper-plastic composite tape or metal foil layer or wire The braided layer 25 is externally extruded or wrapped around the outer sheath 24. The basic functions are the same as those in Example 1 - Example 4 above, and the differential temperature alarm function is added.

The aluminum-plastic composite tape or the copper-plastic composite tape or the metal foil layer or the wire braid layer 25 can be used as a secondary conductor in contact with the NTC or CTR characteristic polymer material layer 23, and the resistance signal processing device can directly collect and coat the NTC or CTR characteristic polymer metal material layer 23 of the elastic metal conductor 21, and the secondary conductor aluminum-plastic composite tape or copper-plastic composite tape or metal foil layer or wire braid layer 25 resistance signal, due to heat, temperature sensing cable The resistance between the elastic metal conductor 21 and the secondary conductor wire braid layer 25 decreases, and the resistance signal processing device outputs a differential temperature alarm signal according to the temperature rise rate and the corresponding resistance decrease speed. Since the secondary conductor cladding has a shielding function, the electromagnetic compatibility or anti-interference ability of the temperature-sensitive cable is enhanced.

Embodiment 6 The structure of the recoverable differential temperature sensing temperature cable is as shown in FIG. 9: an elastic metal conductor 21 is coated with the NTC or CTR characteristic polymer material layer 23, and then coated with an aluminum-plastic composite tape or a copper-plastic composite tape. Or a metal foil or wire braid layer 25, another elastic metal conductor 21 covering the NTC or CTR characteristic polymer material layer 23, and then coating the polymer polymer insulating material or the PTC characteristic polymer material layer 22 Two wire bodies with different coating layers, stranded or entangled, and extruded or wrapped around the outer sheath 24 to form a temperature sensing cable.

Embodiment 7 A structure in which a differential temperature alarm working pole is added and a recoverable differential temperature sensing temperature cable having a shielding function is added is shown in Fig. 10: - the root elastic metal conductor 21 has a polymer insulating material or a high PTC characteristic The molecular polymer material layer 22 and the other elastic metal conductor 21 have a NTC or CTR characteristic polymer material layer 23, two wire bodies of different materials, which are twisted or entangled and then placed or wound one by one or More than one ambient temperature monitoring conductor 26, then coated with an aluminum-plastic composite tape or a copper-plastic composite tape or a metal foil or wire braid 25, and then placed or wound one or more metal secondary conductors 28, and then squeezed together The outer jacket layer 24 is molded or wrapped. The one or more metal secondary conductors 28 may be placed or wound in an aluminum-plastic composite tape or a copper-plastic composite tape or a metal foil or wire braid layer 25 or in an aluminum-plastic composite tape or a copper-plastic composite tape or metal. Inside or outside of the foil or metal braid layer 25. Sliding or winding one or more ambient temperature monitoring conductors 26, also in aluminum-plastic composite tape or copper-plastic composite tape Either or in the metal foil or wire braid layer 25 or both in the aluminum-plastic composite tape or the copper-plastic composite tape or the metal foil or metal braid layer 25. The metal sub-conductor 28 may be omitted, and a temperature-sensitive cable having an auxiliary function may be formed.

• The above ambient temperature monitoring conductor 26 has an insulating layer or no insulating layer. It is connected as a thermal resistance temperature sensor and a resistance signal processor. The conductor resistance signal is detected and the ambient temperature used by the temperature sensing cable is monitored. .

The coated aluminum-plastic composite tape, the copper-plastic composite tape, the metal foil, the wire braided shielding layer 25 and the one or more metal secondary conductors 28 are used as a differential temperature alarm working pole, and have a shielding function. .

Embodiment 8 The structure of the recoverable constant temperature temperature sensing cable with shielding and temperature sensing cable ambient temperature monitoring function is as shown in Fig. 11: a flexible metal conductor 21 is provided with a polymer polymer insulating material or a PTC characteristic high molecular polymer. The material coating layer 22 and the other elastic metal conductor 21 have an NTC or CTR characteristic high molecular polymer material coating layer 23, and then a polymer polymer insulating material or a PTC characteristic high molecular polymer material coating layer 22, After being twisted or entangled, there is an insulating coating 27, and then one or more ambient temperature monitoring conductors 26 and shield conductors 28 are placed or wound, and then coated with an aluminum-plastic composite tape or a copper-plastic composite tape layer or metal. A foil or wire braided cladding 25, the outermost layer being extruded or wrapped around the outer cover 24.

The coated aluminum-plastic composite tape, the copper-plastic composite tape, the metal foil or the wire braid 25 or the winding or the shielding conductor 28 is intended to enhance the electromagnetic compatibility or anti-interference ability of the temperature-sensitive cable.

The insulating tape layer 27, the aluminum-plastic composite tape, the copper-plastic composite tape, the metal foil or the wire braid layer 25 can also be separately or simultaneously added to all the structures of the examples 1 to 6, the cladding layer 27 and the cladding layer 25 Locations are interchangeable.

Embodiment 9 The structure of the recoverable constant temperature temperature sensing cable having the shielding and temperature sensing cable using the ambient temperature monitoring function can also be, as shown in Fig. 12: The outer surface of the two elastic metal conductors is covered with NTC or CTR characteristic polymer material. Layer 23, PTC characteristic polymer material material or polymer polymer insulation material coating layer 22, two wire bodies wrapped with the same material, after being twisted or entangled, one or more ones are placed or wound The ambient temperature monitoring conductor 26 is followed by an insulating tape 27, and then one or more shielded conductors 28 are placed or wound, and then coated with an aluminum-plastic composite tape or a copper-plastic composite tape or a metal foil or a wire braid. The layer 25 is further covered with an insulating tape layer 27, and the outermost layer is extruded or wrapped around the outer jacket layer 24.

One or more of the ambient temperature monitoring conductors 26 in the above Examples 8 and 9 may also be at 24. 25, 27 layers of any placement or winding; one or more shielded conductors 28 can also be placed at the same time inside or outside the aluminum-plastic composite tape or copper-plastic composite tape or metal foil or wire braided tape layer 25 or Winding, or metal shield conductor 28 may also be omitted.

One or more ambient temperature monitoring conductors 26 and shield conductors 28 may also be applied to all of the structures of Examples 1-Example 7 either separately or simultaneously in the manner of Examples 8 and 9.

Embodiment 10 The structure of the unrecoverable constant temperature temperature sensing cable is the same as that of the above-mentioned Example 1 - Example 5 and Example 7 - Example 9, except that the material of the NTC or CTR characteristic polymer material layer 23 is replaced with the semiconductor layer polymer. Material layer or semiconductor tape cladding layer 23 '.

Example 11 The structure of the unrecoverable fixed temperature and recoverable differential temperature temperature temperature cable is the same as that of the above Example 6, see Fig. 9: only one of the NTC or CTR characteristic polymer material coating layers 23 and PTC are sequentially coated. The NTC or CTR characteristic polymer material in the elastic metal conductor 21 of the characteristic high molecular polymer material or the high molecular polymer insulating material coating layer 22 is replaced by a semiconductor layer polymer material layer or a semiconductor strip coating layer 23 ' .

The materials used in the above temperature sensing cable are all common materials in the field:

1. Conductor: Elastic metal conductor, conductor size is selected between Φ0. 2~3.

The material is available in steel wire, copper wire, iron wire, nickel wire, platinum wire, stainless steel wire and alloy material of the above materials. The outer layer of the wire is galvanized, tinned, copper plated, silver plated, chrome plated, nickel plated. Because the metal wire is stretched and stretched to have a certain strength and elasticity, it is called an elastic metal wire.

Between 0. Between 0. 01~3. 0 Between the choice of the 0. 01~3. It can be a copper wire, a copper clad aluminum wire, an iron wire, a steel wire, a nickel wire, a platinum wire, or a stainless steel wire. The outer layer of the conductor can be galvanized, tin plated, copper plated, silver plated, chrome plated, nickel plated.

Ambient temperature monitoring metal conductor: On the basis of the above, the outer layer can also be covered with a layer of insulating material.

2, NTC or CTR negative temperature coefficient polymer material or semiconductor polymer material is polymer (nitrile rubber, fluoro rubber, ethylene propylene rubber, styrene butadiene rubber, neoprene, silicone rubber, poly One of polymer materials such as vinyl chloride resin, polyethylene, fluoroplastic, polypropylene, polyamide plastic, polystyrene, chlorinated polyether, polyamide, chlorinated polyethylene, chlorosulfonated polyethylene, etc. By mixing:

1 Conductive polymer material: one or more of polyacetylene, polyaniline, polythiophene, polyfluorene, polyethylene oxide, quaternary ammonium salt ion antistatic agent, after mixing, hot melt, kneading, It is made by tableting and granulation. 2 It is also possible to pass conductive powder: conductive zinc oxide, conductive titanium oxide, conductive vanadium oxide, conductive tin oxide, conductive lead oxide, conductive silicon dioxide, copper powder, aluminum powder, iron powder, silver powder, tin powder, nickel One or more of powder, conductive carbon black, and carbon black are prepared by mixing, hot-melting, kneading, tableting, and granulating.

3 It can also be made by mixing plasticizers (225 kinds of plasticizers known), one or more after mixing, hot-melt, kneading, tableting, granulation.

4 Adjuvant: Antioxidant, heat stabilizer, light stabilizer, flame retardant, enhancer, colorant, lubricant, antifogging agent, anti-aging agent, antistatic agent, termite-proofing agent, anti-rat agent, accelerator One or more of the softeners, which do not affect the product characteristics after addition, may or may not be more or less.

5 fillers, reinforcing agents: calcined clay, calcium bicarbonate, talc, titanium dioxide, red mud, fly ash, glass fiber, zinc oxide, magnesium oxide, porcelain clay, fillers play an incremental role, do not affect Product characteristics, with or without, can be more or less.

One of the 123 items can be one of them, and several or all of them can be added.

3. PTC (Positive Temperature Coefficient) Properties High molecular polymer materials are based on high molecular weight polymers (polyethylene, polypropylene, ethylene-vinyl acetate copolymer, natural rubber, polyvinylidene fluoride, etc.). miscellaneous:

1 It is also possible to pass conductive powder: conductive zinc oxide, conductive titanium oxide, conductive vanadium oxide, conductive tin oxide, conductive lead oxide, conductive silicon dioxide, copper powder, aluminum powder, iron powder, silver powder, tin powder, nickel One or more of powder, conductive carbon black, and carbon black are prepared by mixing, hot-melting, kneading, tableting, and granulating.

2 Adjuvant: Antioxidant, heat stabilizer, light stabilizer, flame retardant, enhancer, colorant, lubricant, antifogging agent, anti-aging agent, antistatic agent, termite-proofing agent, anti-rat agent, accelerator , softener, does not affect the product characteristics after the addition, can be more or less, more or less.

3 Filling and reinforcing agents: Calcined clay, calcium bicarbonate, talc, titanium dioxide, red mud, fly ash, glass fiber, zinc oxide, magnesium oxide, porcelain clay, fillers play an incremental role, do not affect the product Features, optional, more or less.

4. Insulating coating: The material can be polyvinyl chloride, polyethylene, fluoroplastic, polyamide plastic, polyurethane plastic, polypropylene, polystyrene, chlorinated polyethylene, ethylene-vinyl acetate copolymer.

Extrusion or wrapping of the outer sheath layer: The material may be a polymer polymer insulation material or a PTC, NTC, CTR characteristic polymer material or a semiconductor polymer material. 5. Semiconductor strip - The material can be: paper semiconductor strip, fiberglass semiconductor strip, synthetic fiber semiconductor strip, natural fiber semiconductor strip.

毫米之间之间。 Selecting the thickness of the outer layer of the outer layer of the outer layer of the outer layer of the outer layer of the outer layer.

The thickness of the insulating coating can be selected between 0. 01~1. 0mm, and the width can be selected between 5~40mm.

The thickness of the aluminum-plastic composite tape or the copper-plastic composite tape or the metal foil may be selected between 0. 01~: 1. 0mm.

0之间之间。 Select between NTC or CTR negative temperature coefficient polymer material or semiconductor polymer material coating, coating thickness of 0. 05~2.

The thickness of the polymer layer or the PTC polymer material is between 0.05 and 2. 0 mm.

The thickness of the semiconductor strip is selected between 0. 01~2. 0mm, and the width is selected between 5~30mm.

Claims

Rights request

1. Multi-functional cable type linear temperature fire detector, which is connected with the resistance signal processing device and the terminal box at both ends of the temperature sensing cable to form a closed circuit signal acquisition circuit, which is characterized by the two elastic metal conductors of the temperature sensing cable. Two different material barrier layers are provided, including polymer polymer insulation material or PTC characteristic polymer material layer and NTC or CTR or semiconductor polymer material material or semiconductor tape barrier layer, and two coating layers. After the strands are twisted or entangled, coated with a layer of aluminum-plastic composite tape or copper-plastic composite tape or metal foil or wire braid, and then extruded or wrapped with an outer sheath to form a temperature-sensitive cable; The resistance signal processing device monitors the amount of change in resistance between the two elastic metal conductors of the temperature sensing cable due to different material coating layers and the elastic metal conductor and the coated aluminum plastic coated with the NTC or CTR characteristic polymer material The difference between the heating rate resistance values generated between the composite strip layers, and the setting of the alarm signal of the NTC or CTR characteristic polymer material layer in the memory of the resistance signal processing device A plurality of temperature level alarm values and a heating rate alarm value are set in the resistance range which changes linearly from high to low, and the temperature monitoring of the temperature sensing cable use environment is performed, and the switch quantity constant temperature alarm signal output and the analog quantity fixed temperature alarm signal are realized. Output, differential temperature alarm signal output, real-time monitoring of the cable's ambient temperature changes, analog signal output.

2. The multifunctional cable type temperature sensitive fire detector according to claim 1, wherein (1) the recoverable temperature sensing cable structure is: one of two elastic metal conductors covering NTC or CTR characteristics a polymer material layer (23), another layer of a polymer polymer insulating material or a PTC property polymer material layer (22), and two wire bodies having different material coating layers are stranded or entangled in Together, in the extrusion or wrapping of an outer sheath (24); (2) unrecoverable fixed temperature temperature cable structure: only replace the NTC or CTR characteristic polymer material layer (23) with semiconductor polymer polymerization The material or semiconductor tape is covered (23'), and the rest is the same as (1).

3. The multi-functional cable type temperature sensitive fire detector according to claim 1, wherein: (1) the recoverable constant temperature temperature sensing cable structure is: two elastic metal conductors (21), one of which is The polymer polymer insulating material or the PTC characteristic polymer material layer (22) or the NTC or CTR characteristic polymer material layer (23) and the polymer polymer insulating material or the PTC characteristic polymer a material layer (22), another layer coated with NTC or CTR characteristic polymer material layer (23) and a polymer polymer insulating material or a PTC characteristic polymer material layer (22), two coated layers The wire body, stranded or entangled, in an extruded or wrapped outer sheath (24); (2) Unrecoverable fixed-temperature temperature-sensing cable structure: only the NTC or CTR characteristic polymer material layer (23) Replace with a semiconductor high molecular polymer material or a semiconductor tape coating layer (23'), and the rest is the same as (1).

4. The multi-functional cable type temperature sensitive fire detector according to claim 1, wherein (1) The structure of the recoverable constant temperature temperature sensing cable is: two elastic metal conductors (21) respectively coating the NTC or CTR characteristic polymer material layer (23), and then respectively coating a layer of polymer insulation Material or PTC characteristic polymer material layer (22>, two or more of which are coated with a layer of aluminum-plastic composite tape or copper-plastic composite tape or metal foil layer (25), the two have the same or different The wire body of the coating, stranded or entangled, extruded or wrapped around an outer sheath (24); (2) Unrecoverable fixed temperature temperature cable structure: only polymerize NTC or CTR properties The material layer (23) is replaced by a semiconductor high molecular polymer material or a semiconductor tape coating layer (23'), and the rest is the same as (1).

5. The multi-functional cable type temperature sensitive fire detector according to claim 1, wherein (1) the recoverable differential temperature sensing temperature cable structure is further: an elastic metal conductor (21) coated NTC or CTR characteristic polymer material layer (23), another conductor (21) coated with polymer polymer insulation material or PTC characteristic polymer material layer (22>, two with the same cladding layer Wire body, stranded or entangled, wrapped in aluminum-plastic composite tape or copper-plastic composite tape or metal foil or wire braid (25), extruded or wrapped outer sheath (24); (2 Unrecoverable fixed temperature temperature cable structure: only replace the NTC or CTR characteristic polymer material layer (23) with a semiconductor polymer material or a semiconductor tape coating (23 '), and the rest is the same as (1) .

The multi-functional cable type linear temperature fire detector according to claim 1, characterized in that: (1) the recoverable differential temperature sensing temperature cable structure can also be: an elastic metal conductor (21) coated NTC or CTR characteristic polymer material layer (23>, coated with aluminum-plastic composite tape or copper-plastic composite tape or metal foil layer (25), another elastic metal conductor (21> coated with NTC or CTR characteristic polymer material layer (23), and then coated with a layer of polymer polymer insulation material or PTC characteristic polymer material layer (22), two wire bodies with different coating layers, twisted Cohesive or entangled, externally extruded or wrapped outer sheath (24); (2) Temperature-sensitive cable structure that cannot recover constant temperature and recovers differential temperature: only one layer is coated with NTC or CTR characteristic polymer The NTC or CTR characteristic polymer material layer (23) in the line body of the polymer material layer (23) and the polymer polymer insulating material layer or the PTC property polymer material material layer (22) is replaced by a semiconductor polymer Polymer material or semiconductor tape coating (23 '), the rest (1).

7. The multi-functional cable type linear temperature fire detector according to claim 1, characterized in that: (1) recoverable differential temperature alarm working pole secondary conductor and temperature sensing cable ambient temperature monitoring conductor differential temperature sense The temperature cable has the following structure: an elastic metal conductor (21) has a polymer polymer insulation coating (22>, and another elastic metal conductor (21) has a CTR or NTC characteristic polymer material. a coating (23>, stranded or wound, followed by or wound one or more ambient temperature monitoring conductors (26), followed by an aluminum-plastic composite tape or a copper-plastic composite tape or a metal foil or wire braided package a coating (25) that can be placed or wound with one or more metal secondary conductors (28) and then extruded or wound together Outer sheath layer (24); one or more metal secondary conductors (28) may be in or outside the aluminum-plastic composite tape or copper-plastic composite tape or metal foil or wire braid coating (25) Simultaneously placed or wound; one or more ambient temperature monitoring conductors (26) are simultaneously placed outside or inside and outside the aluminum-plastic composite tape or copper-plastic composite tape or metal foil or metal braided wire coating (25) Or entanglement; (2) Unrecoverable fixed temperature temperature cable structure: only replace NTC or CTR characteristic polymer material layer (23) with semiconductor polymer material or semiconductor tape coating (23'), the rest Same as (1). '

8. The multi-functional cable type temperature sensitive fire detector according to claim 1, wherein (1) the structure of the recoverable fixed temperature temperature sensing cable having a shielding function is further: an elastic metal conductor ( 21) There is a PTC characteristic polymer polymer insulating material or a polymer polymer insulating material coating layer (22), and another elastic metal conductor (21) has a NTC or CTR characteristic high molecular polymer material coating layer ( 23), followed by a PTC-characterized polymer material or a polymer-polymer insulation coating (22), with an insulating tape layer (27) after twisting, and then can be placed or wound one or one The above ambient temperature monitoring wire (26) and the metal secondary conductor (28) are coated with an aluminum plastic or copper plastic composite tape layer or a wire braided coating layer (25), and the outermost layer is extruded or wrapped outer sheath. Layer (24); (2) Unrecoverable fixed-temperature temperature-sensing cable structure: only replace NTC or CTR characteristic polymer material layer (23) with semiconductor polymer material or semiconductor tape coating (23 ') The rest is the same as (1).

9. The multi-functional cable type temperature sensitive fire detector according to claim 1, wherein (1) the structure of the recoverable fixed temperature temperature sensing cable having the shielding and temperature sensing cable using the ambient temperature monitoring function may be , one or one of NTC or CTR characteristic polymer material or semiconductor material coating layer (23), PTC characteristic polymer polymer insulation material or polymer polymer insulation material coating layer (22) The above main conductor (21), after twisting, is wound or wound one or more ambient temperature monitoring wires (26), followed by an insulating tape layer (27), and then one or more metals are placed or wound The secondary conductor (28) is coated with an aluminum-plastic or copper-plastic composite tape layer or a wire braided coating (25), and then placed or wound with one or more ambient temperature monitoring wires (26), and then coated There is an insulating tape layer (27), the outermost layer is an extruded flame-retardant outer sheath layer (24); (2) Unrecoverable fixed-temperature temperature-sensing cable structure: only NTC or CTR characteristic polymer material or Semiconductor material cladding layer (23) replaced by semiconductor polymer polymer The composite material or semiconductor has a cladding layer (23'), and the rest is the same as (1).

10. The multi-functional cable type temperature sensing fire detector according to claim 1, characterized in that the recoverable and non-recoverable temperature sensing cable structure is:

(1) Insulation coating (27), aluminum-plastic composite tape, copper-plastic composite tape, metal foil or wire braid (25) can be coated simultaneously or separately in NTC or CTR properties polymer materials or semiconductor materials Layer (23) or PTC characteristic polymer polymer insulation material or polymer polymer insulation material coating layer (22) stranded wire outside, outer sheath (24) adjacently coated, cladding layer (27) and The coating layer (25) position can be Swap

(2) One or more ambient temperature monitoring wires (26) may also be simultaneously or separately in the outer sheath layer (24), aluminum-plastic or copper-plastic composite tape layer or wire braid coating (25), insulation package One or more metal secondary conductors (28) may be placed or wound in or out of the aluminum or copper plastic wrap layer (25) in a layered or wound combination of layers (27).