CN212229786U

CN212229786U - Temperature-sensitive detector cable

Info

Publication number: CN212229786U
Application number: CN202020848928.6U
Authority: CN
Inventors: 王印斌; 王文江; 李绪东
Original assignee: SHENYANG PROACTIVE FIRE SYSTEM Ltd
Current assignee: SHENYANG PROACTIVE FIRE SYSTEM Ltd
Priority date: 2020-05-13
Filing date: 2020-05-13
Publication date: 2020-12-25
Anticipated expiration: 2030-05-13

Abstract

A temperature-sensitive detector cable is characterized in that the cable has the structure: and one detection conductor is sequentially coated with the NTC characteristic material layer and the semiconductor material layer from the inside to the outside, then is wound with the other detection conductor together, and finally is coated with the outer sheath layer. The semiconductor material layer is continuously conducted, and at least one of the two detection conductors is an elastic conductor. The detector cable has the function of converting switching value characteristic temperature sensing into analog quantity characteristic after being heated, and can completely detect structural characteristic defects. Connect alarm device, but real time monitoring detector cable structure physical change, detector cable takes place structural change because of non-conflagration reason, can send failure alarm signal, has solved current analog quantity line type temperature sensing fire detector cable because unable detection structure technical defect, does not report to the police when causing the conflagration to take place the problem that failure alarm signal was sent out to the mistake when causing the conflagration to take place.

Description

Temperature-sensitive detector cable

Technical Field

The utility model relates to a fire detection alarm device, a temperature-sensitive detector cable.

Background

An analog quantity line type temperature-sensing fire detector cable in the prior art, application number 200610101726.X, the detector includes: two parallel arrangement's detection conductor is provided with NTC characteristic barrier layer and fusible insulating layer, its characterized in that between two parallel arrangement's detection conductor: and a conductor which is discontinuously conducted is arranged between the NTC characteristic barrier layer and the fusible insulating layer along the length direction of the fire detector cable to form an analog linear temperature-sensing fire detector cable.

Fig. 1 shows an analog quantity line type temperature-sensing fire detector cable, in the detector cable, there are two parallel detecting

conductors

10, 9, there are NTC characteristic barrier layer 7, intermittent conducting conductor 8 and fusible insulating layer 11 between two parallel detecting

conductors

10, 9, when the detector cable is heated, the fusible insulating layer 11 melts or softens, the detecting conductor 10 contacts with intermittent conducting conductor 8 and conducts, the resistance between the detecting

conductor

10, 9 of the detector cable changes with the temperature. And (4) according to the temperature rise of the detector cable, the resistance changes, and fire alarm is carried out according to the change of the electrical parameter. The production manufacturing process of the prior analog quantity line type temperature-sensing fire detector cable is that a conducting layer must be prepared in advance with a conductor material which is conducted intermittently, the conducting length of each section is 0.05-2 m, the intermittent distance between the conducting sections, namely the non-conducting length is 0.1-10 mm, the intermittent conductor material is covered on a wire body to produce a large-length detector cable, and the production process and the product quality are difficult to guarantee; the other production process is that after the continuously conducting material is coaxially arranged, the conducting material is processed into an intermittent conducting state by a physical method (such as mechanical cutting) or a chemical method, the detector cable is coated with continuously conducting conductive paint and is processed into the intermittent conducting state by the physical method (such as mechanical cutting) or the chemical method, and the production process is difficult to ensure the product quality and has extremely low production efficiency.

In summary, the core technology of the analog quantity line type temperature-sensing fire detector cable adopts the intermittent conduction of the conducting layer, so that the false alarm caused by the service length of the detector cable and the ambient temperature can be solved, and the problem of inaccurate alarm temperature is avoided. The defect is that the conductive layer is in discontinuous conduction, so that short circuit occurs between each conductive layer and the detection conductor of the NTC characteristic barrier layer and between each conductive layer and the detection conductor of the fusible insulating layer due to mechanical damage in the using process, and the defect hidden danger exists because no monitoring means exists and a finished product has no way of detection. In the using process, once a fire disaster happens to the defect part, a fire alarm signal cannot be sent out, so that the fire disaster detection is not timely, and the consequences are serious. The analog linear temperature-sensing fire detector cable in the prior art is not protected by an outer sheath layer, is very easy to corrode, is easy to cause false alarm and affects the service life because the detector cable is used outdoors, in a cable trench and other severe environments. Therefore, there is a need for a linear temperature-sensitive detector cable that overcomes the above-mentioned disadvantages.

Disclosure of Invention

The utility model aims at providing a temperature-sensitive detector cable, this detector cable realize being heated by switching value characteristic temperature sensing and convert the analog quantity characteristic into, the analog quantity characteristic is reliable and stable, and detector cable warning precision does not receive use length and rated maximum service environment temperature to influence, and detector cable use length can be more than 5000 meters.

The utility model relates to a temperature-sensitive detector cable, the structure of its characterized in that cable: the two detection conductors are mutually wound, wherein one detection conductor is sequentially coated with an NTC characteristic material layer, a semiconductor material layer and a meltable insulating material layer from inside to outside, then is wound with the other detection conductor together, and finally is coated with an outer sheath layer. The semiconductor material layer is continuously conducted, and at least one of the two detection conductors is an elastic conductor.

Compared with the prior art, the utility model has the advantages that: the outer coating layer of the detection conductor adopts a continuous conduction semiconductor technology, the processing technical means is advanced, the production efficiency is high, the processing procedures are reduced, and the energy consumption is reduced. By improving the continuous conduction semiconductor technology, the cable of the detector is converted into an analog quantity characteristic after being heated by switching value characteristic temperature sensing, the application technical performance is improved, the structural characteristic can be completely detected when a defect occurs, and the technical effect is remarkably improved. Can monitor the physical change of detector cable structure in real time after connecting alarm device, the detector cable can send trouble alarm signal because of non-conflagration reason emergence structural change, has solved current analog quantity line type temperature sensing fire detector cable, because production and processing technology is imperfect, and structural technical defect can't detect, the wrong problem of sending trouble alarm signal when easily causing the conflagration to take place.

Brief description of the drawings

FIG. 1 is a schematic view of a cable structure of a conventional analog line-type temperature-sensitive fire detector;

fig. 2 is a schematic structural diagram of an embodiment of a cable for a temperature-sensitive detector according to the present invention;

Detailed Description

A temperature-sensitive detector cable, the implementation of which is shown in fig. 2: the detector comprises a detection conductor 1 and a detection conductor 2 which are mutually wound, wherein the detection conductor 1 is sequentially coated with an NTC characteristic material layer 3, a semiconductor material layer 4 and a meltable insulating material layer 5 from inside to outside, and the detection conductor 1 with a coating layer is wound with the detection conductor 2 and finally coated with an outer sheath layer 6. At least one of the detecting conductor 1 and the detecting conductor 2 is an elastic conductor.

During manufacturing, the detecting conductor 1 is coated with the NTC characteristic material layer 3, the semiconductor material layer 4 and the meltable insulating material layer 5 from inside to outside in sequence, and the NTC characteristic material layer 3, the semiconductor material layer 4 and the meltable insulating material layer 5 are coated outside the detecting conductor 1 in sequence at one time by adopting a conventional wire and cable three-layer coating technology. Then the detection conductor 1 with the coating layer and the detection conductor 2 are wound together by a wire twisting machine, and finally the outer sheath layer 6 is coated by adopting the conventional wire and cable coating technology.

The utility model discloses a temperature-sensitive detector cable theory of operation: when the detector cable is heated and reaches the rated alarm temperature of the temperature-sensitive detector cable, the meltable insulation material 5 is softened or melted, the detection conductor 2 cuts off the meltable insulation material 5 under the action of the twisting stress and is in contact with the semiconductor material layer 4, so that a resistance value sudden change reduction signal can be detected, and the short-circuit fire alarm signal can be set according to the resistance value sudden change reduction signal; the detecting conductor 2 is contacted with the semiconductor material layer 4, the resistance value change of the NTC characteristic material layer 3 can be detected in real time, and a plurality of temperature fire alarm signals can be judged according to the resistance value change. When the detector cable is not heated or is lower than the rated alarm temperature of the detector cable, the detection conductor 2 is in contact with the semiconductor material layer 4 due to mechanical damage, a superposed resistance value sudden change reduction signal cannot be generated, and the fault signal of the detector cable structure can be judged according to the resistance value reduction.

Claims

1. A temperature-sensitive detector cable is characterized in that the cable has the structure: the detector comprises two detection conductors which are mutually wound, wherein one detection conductor is sequentially coated with an NTC characteristic material layer (3), a semiconductor material layer (4) and a meltable insulating material layer (5) from inside to outside, then is wound with the other detection conductor, and finally is coated with an outer sheath layer (6), and at least one detection conductor is an elastic conductor.