Fire-fighting fire detector cable

Abstract

The utility model relates to the technical field of fire-fighting equipment, in particular to a fire-fighting fire detector cable, which comprises a protective sleeve layer, a first detection conductor and a second detection conductor are arranged in the protective sleeve layer, an NTC (Negative Temperature Coefficient) material layer is sleeved on the surface of the first detection conductor, and a semiconductor material layer is sleeved on the surface of the NTC material layer. The surface of the semiconductor material layer is fixedly connected with a plurality of groups of elastic guide sheets which are distributed at intervals, the surface of the second detection conductor is sleeved with a fusible insulating layer, and the elastic guide sheets abut against the surface of the fusible insulating layer; after the meltable insulating layer melts, the lower end of the elastic guide sheet rotates towards the inner side and abuts against the surface of the second detection conductor, so that sudden decrease of the resistance value can be rapidly detected, a fire generation signal can be rapidly detected, and the fire detection precision is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of fire-fighting equipment, in particular to a fire detector cable. Background Art

[0002] The fire detector is the "sensory organ" of the system. Its function is to monitor whether there is a fire in the environment. Once there is a fire, it will immediately send an alarm signal to the fire alarm controller.

[0003] Among them, announcement number CN213183028U discloses a linear temperature-sensing fire detector cable, which is characterized by the structure of the cable: two detection conductors arranged intertwined with each other, the first one is coated with a fusible insulating material layer, and the second detection conductor is coated with an NTC characteristic material layer and a semiconductor material layer from the inside to the outside. The two coated detection conductors are twisted together and finally coated with an outer sheath layer. The semiconductor material layer is continuously conductive, and at least one of the two detection conductors is an elastic conductor. The outer coating of the detection conductor adopts improved continuous conduction semiconductor technology to realize the conversion of the temperature sensing characteristic of the switching quantity into an analog quantity characteristic after being heated, thereby improving the application technology performance, and the structural characteristic defects can be fully detected, and the technical effect is significantly improved. It solves the problem that the existing technology cannot detect structural technical defects due to backward production and processing technology, which easily causes the erroneous issuance of fault alarm signals when a fire occurs.

[0004] During use, the device softens the fusible insulating material through high temperature, and the leaked detection conductor contacts the semiconductor material layer, which can detect a sudden decrease in resistance signal and then judge it as a short-circuit fire alarm signal. However, in actual use, since the fusible insulating material has a certain thickness, when the melting distance is small, it is supported by the fusible insulating material on both sides, and the detection conductor cannot contact the semiconductor material layer at the first time, which affects the judgment of the fire, causing the alarm signal to be delayed and the fire detection accuracy to be low.

[0005] Therefore, it is necessary to invent a fire detector cable to solve the above problems. Utility Model Content

[0006] The purpose of the utility model is to provide a fire detector cable to solve the problem in the technology that the detection conductor is supported by fusible insulating materials on both sides and cannot contact the semiconductor material layer in the first time, which in turn affects the judgment of the fire, causes the alarm signal to be delayed, and has low fire detection accuracy.

[0007] In order to achieve the above-mentioned objectives, the present invention provides the following technical solutions: a fire detector cable, comprising a protective sheath layer, wherein a first detection conductor and a second detection conductor are arranged inside the protective sheath layer, the surface of the first detection conductor is covered with an NTC material layer, the surface of the NTC material layer is covered with a semiconductor material layer, the surface of the semiconductor material layer is fixedly connected with multiple groups of elastic guide plates distributed at intervals, the surface of the second detection conductor is covered with a fusible insulating layer, and the elastic guide plates are tightly against the surface of the fusible insulating layer.

[0008] By adopting the above technical solution, during use, when the fusible insulating layer melts, the lower end of the elastic guide piece rotates inward and abuts against the surface of the second detection conductor, thereby quickly detecting a sudden decrease in resistance value, thereby quickly detecting a fire occurrence signal and improving the accuracy of fire detection.

[0009] Optionally, a protective surface layer is provided on the surface of the semiconductor material layer.

[0010] By adopting the above technical solution, the protective surface protects the surface of the semiconductor material layer.

[0011] Optionally, a plurality of first fixing rings are fixedly connected to the surface of the protective surface layer.

[0012] By adopting the above technical solution, the first fixing rings are distributed at intervals on the surface of the protective surface layer.

[0013] Optionally, a positioning groove is provided on the lower surface of the first fixing ring.

[0014] Optionally, a plurality of second fixing rings are fixedly connected to the surface of the meltable insulating layer.

[0015] By adopting the above technical solution, the second fixing rings are distributed at intervals on the surface of the meltable insulating layer.

[0016] Optionally, a positioning block is provided on the surface of the second fixing ring.

[0017] Optionally, the positioning block is slidably connected to the positioning slot.

[0018] By adopting the above technical solution, the positioning block is slid into the interior of the positioning groove to fix the first detection conductor and the second detection conductor.

[0019] In the above technical solution, the technical effects and advantages provided by the utility model are:

[0020] 1. During use, when the fusible insulating layer melts, the lower end of the elastic guide rotates inward and contacts the surface of the second detection conductor, thereby quickly detecting a sudden decrease in resistance and thus quickly detecting a fire signal, thereby improving fire detection accuracy.

[0021] 2. The utility model protects the surface of the semiconductor material layer through the protective surface, while preventing the semiconductor material and the meltable insulating layer from wearing each other, effectively increasing the service life of the equipment and further improving the detection accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0023] Figure 2 This is a schematic diagram of the internal structure of the utility model;

[0024] Figure 3 This is a schematic diagram of the first detection conductor structure of the present utility model;

[0025] Figure 4 This is a schematic diagram of the second detection conductor structure of the present utility model.

[0026] Description of reference numerals:

[0027] 1. Protective sleeve layer; 2. First detection conductor; 21. NTC material layer; 22. Semiconductor material layer; 23. Protective surface layer; 24. Elastic guide plate; 25. First fixing ring; 26. Positioning groove; 3. Second detection conductor; 31. Meltable insulation layer; 32. Second fixing ring; 33. Positioning block. DETAILED DESCRIPTION

[0028] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0029] The utility model provides Figure 1 and Figure 2 The fire detector cable shown includes a protective sheath 1, a first detection conductor 2 and a second detection conductor 3 are arranged inside the protective sheath 1, the surface of the first detection conductor 2 is covered with an NTC material layer 21, the surface of the NTC material layer 21 is covered with a semiconductor material layer 22, the surface of the semiconductor material layer 22 is fixedly connected with multiple groups of elastic guide plates 24 distributed at intervals, the surface of the second detection conductor 3 is covered with a fusible insulating layer 31, and the elastic guide plates 24 are tightly against the surface of the fusible insulating layer 31.

[0030] Among them, when the detector cable is heated, the fusible insulating layer 31 will melt. At this time, the elastic guide piece 24 rebounds to the rear side under the action of elastic force, and quickly contacts the surface of the second detection conductor 3, so that the fusible insulating layer 31 melts at the first moment. The elastic guide piece 24 connects the semiconductor material layer 22 with the second detection conductor 3, and then, by superimposing the NTC material layer 21, the resistance value decreases due to heat, and a resistance sudden decrease signal can be detected, which can be judged as a fire alarm signal, thereby improving the detection speed and detection accuracy, and handling the fire more quickly.

[0031] See Figures 2 to 4 The surface of the semiconductor material layer 22 is covered with a protective surface layer 23, and the surface of the protective surface layer 23 is fixedly connected with multiple sets of first fixing rings 25, and the lower surface of the first fixing ring 25 is provided with a positioning groove 26. The surface of the fusible insulating layer 31 is fixedly connected with multiple sets of second fixing rings 32, and the surface of the second fixing ring 32 is provided with a positioning block 33, and the positioning block 33 is slidably connected to the positioning groove 26.

[0032] In addition, the NTC material layer 21 and the semiconductor material layer 22 are sequentially coated on the surface of the first detection conductor 2, and then the elastic guide plate 24 is fixed on the surface of the semiconductor material layer 22, and then the protective surface layer 23 is coated on the surface of the semiconductor material layer 22, and then the first fixing ring 25 is fixed on the surface of the protective surface layer 23. At the same time, the fusible insulating layer 31 is coated on the surface of the second detection conductor 3 using conventional technology, and the second fixing ring 32 is fixed equidistantly on the surface of the fusible insulating layer 31. During the installation process, the two groups of detection conductors are connected by inserting the positioning block 33 into the inside of the positioning groove 26, and finally the protective cover layer 1 is coated on the surface of the protective surface layer 23 and the fusible insulating layer 31.

[0033] At the same time, during use, the protective surface layer 23 is used to protect the surface of the semiconductor material layer 22, to separate the semiconductor material layer 22 from the surface of the meltable insulating layer 31, to reduce the wear between the semiconductor material layer 22 and the meltable insulating layer 31, and to improve the service life of the cable.

[0034] The working principle of the present invention is as follows: after the meltable insulating layer 31 melts, the lower end of the elastic guide piece 24 rotates inward and abuts against the surface of the second detection conductor 3, thereby quickly detecting a sudden decrease in resistance value, thereby quickly detecting a fire signal and improving fire detection accuracy.

[0035] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely preferred examples of the present invention and are not intended to limit the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and improvements fall within the scope of the present invention.

Claims

1. A fire detector cable, comprising a protective sheath layer (1), characterized in that: A first detection conductor (2) and a second detection conductor (3) are provided inside the protective sleeve layer (1); the surface of the first detection conductor (2) is covered with an NTC material layer (21); the surface of the NTC material layer (21) is covered with a semiconductor material layer (22); the surface of the semiconductor material layer (22) is fixedly connected with a plurality of elastic guide pieces (24) distributed at intervals; the surface of the second detection conductor (3) is covered with a fusible insulating layer (31); the elastic guide piece (24) is in close contact with the surface of the fusible insulating layer (31).

2. The fire detector cable according to claim 1, characterized in that: The surface of the semiconductor material layer (22) is covered with a protective surface layer (23).

3. The fire detector cable according to claim 2, characterized in that: A plurality of groups of first fixing rings (25) are fixedly connected to the surface of the protective surface layer (23).

4. The fire detector cable according to claim 3, characterized in that: A positioning groove (26) is provided on the lower surface of the first fixing ring (25).

5. The fire detector cable according to claim 4, characterized in that: A plurality of sets of second fixing rings (32) are fixedly connected to the surface of the meltable insulating layer (31).

6. The fire detector cable according to claim 5, characterized in that: A positioning block (33) is provided on the surface of the second fixing ring (32).

7. The fire detector cable according to claim 6, characterized in that: The positioning block (33) is slidably connected to the positioning groove (26).

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