Fire alarm fireproof cable

Abstract

The utility model discloses a fire alarm fire-resistant cable, which belongs to the technical field of power cables, and comprises a cable body, a plurality of grooves arranged outside the cable body, hoses fixed in the grooves, and a gas fire extinguishing air bag, one end of each hose is closed, the other end of each hose is mounted on the fire extinguishing air bag, and the fire extinguishing air bag is filled with fire extinguishing gas. The grooves are spiral, the cable body comprises a plurality of insulated wires and a wrapping layer used for wrapping the insulated wires, and a filling layer is arranged between the insulated wires and the wrapping layer. After the cable is laid, the hoses are connected to the corresponding air outlet pipes, and the switch valves on all the air outlet pipes connected with the hoses are opened, so that when a fire disaster occurs, if the fire spreads to the cable, the corresponding hoses are fused, the fire extinguishing gas in the fire extinguishing air bags is released, the fire extinguishing gas is diffused near the cable, and the fire extinguishing effect is improved. And the effects of isolating air and reducing fire behavior are achieved, so that the cable is protected, and the alarm time of the alarm is prolonged.

Description

Technical Field

[0001] The utility model belongs to the technical field of power cables, and in particular relates to a fire alarm fire-resistant cable. Background Art

[0002] Fire-resistant cables are cables that can maintain safe operation for a certain period of time under flame conditions. Fire-resistant cables are widely used in high-rise buildings, subways, underground streets, large power stations, and important industrial and mining enterprises and other places related to fire safety and firefighting and lifesaving, such as power supply lines and control lines for emergency facilities such as fire-fighting equipment and emergency guide lights.

[0003] Fire-resistant cables usually use 70℃ and 105℃ PVC insulation and sheath; 90℃ for cross-linked polyethylene insulation; 220℃ and 260℃ for fluoroplastic insulation and sheath; 90℃ and 125℃ for fluoroplastic insulation and 105℃ flame-retardant PVC sheath; 70℃ for low-halogen and low-smoke flame-retardant PVC insulation and sheath; 90℃ and 125℃ for halogen-free and low-smoke flame-retardant polyolefin insulation and sheath. If the fire is large and directly burns the cable, the temperature of the flame is much higher than the fire-resistant temperature of the cable. If the flame directly burns the cable, it is easy to fuse the cable. For the cable used for connecting the fire alarm for fire safety, once it fuses, it will affect the alarm time of the fire alarm, which will cause personnel to ignore it, causing the fire to spread and causing serious consequences. In order to solve the above problems, a fire alarm fire-resistant cable is now provided.

[0004] It should be noted that the above contents belong to the technical knowledge of the inventor and do not necessarily constitute prior art. Utility Model Content

[0005] In order to solve the above problems, the purpose of the utility model is to provide a fire alarm fire-resistant cable. After the cable is laid, a hose is connected to the corresponding air outlet pipe, and the switch valves on all the air outlet pipes connected to the hose are opened. When a fire occurs, if the fire spreads to the cable, the corresponding hose will be melted, so that the fire extinguishing gas in the fire extinguishing airbag is released, and the fire extinguishing gas is diffused near the cable, which plays a role in isolating the air and reducing the fire, thereby protecting the cable and extending the alarm time of the alarm.

[0006] To achieve the above-mentioned purpose, the utility model proposes a fire alarm fire-resistant cable, the cable comprising a cable body, a plurality of grooves being arranged on the outside of the cable body, a hose being fixed in the groove, the cable also comprising a gas fire extinguishing airbag, one end of the hose being closed, and the other end being mounted on the fire extinguishing airbag, the fire extinguishing airbag being filled with fire extinguishing gas.

[0007] Furthermore, the groove is spiral-shaped.

[0008] Furthermore, the cable body includes a plurality of insulating wires and a wrapping layer for wrapping the insulating wires.

[0009] Furthermore, the wrapping layers are, from the inside to the outside, an outer sheath, a metal shielding layer, an outer tape layer and an inorganic heat absorption layer.

[0010] Furthermore, a filling layer is provided between the insulating wire and the wrapping layer.

[0011] Furthermore, the insulated wire includes a wire core, and the outside of the wire core is wrapped with an inner sheath.

[0012] Furthermore, the fire extinguishing airbag is connected to a plurality of air outlet pipes, and a hose is connected to the air outlet pipes.

[0013] Furthermore, a switch valve is installed on the air outlet pipe.

[0014] The fire alarm fire-resistant cable proposed by the utility model can bring the following beneficial effects:

[0015] After the cable of the utility model is laid, the hose is connected to the corresponding air outlet pipe, and the switch valves on all the air outlet pipes connected to the hose are opened. When a fire occurs, if the fire spreads to the cable, the corresponding hose will be melted, so that the fire extinguishing gas in the fire extinguishing airbag is released, and the fire extinguishing gas is diffused near the cable, which plays a role in isolating the air and reducing the fire, thereby protecting the cable and prolonging the alarm time of the alarm. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0017] Figure 1 The utility model is a cross-sectional structural diagram of a fire alarm fire-resistant cable.

[0018] Figure 2 The utility model is a structural schematic diagram of a fire alarm fire-resistant cable.

[0019] In the figure: 1. wire core; 2. inner sheath; 3. outer sheath; 4. metal shielding layer; 5. inorganic heat absorption layer; 6. filling layer; 7. groove; 8. hose; 9. fire extinguishing airbag; 10. exhaust pipe; 11. switch valve; 12. outer tape layer. DETAILED DESCRIPTION

[0020] In order to more clearly illustrate the overall concept of the present invention, a detailed description is given below in the form of examples in conjunction with the accompanying drawings.

[0021] In the description of the present invention, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential" and the like indicating orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0022] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0023] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0024] In the present utility model, unless otherwise clearly specified and limited, the first feature "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. In the description of this specification, the description of reference terms "one scheme", "some schemes", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the scheme or example are included in at least one scheme or example of the present utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same scheme or example. Moreover, the specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more schemes or examples.

[0025] The embodiment of the utility model provides a fire alarm fire resistant cable, the cable includes a cable body, such as Figure 1 , Figure 2As shown, a plurality of spiral grooves 7 are provided on the outside of the cable body, and a hose 8 is fixed in the groove 7. The cable also includes a gas fire extinguishing airbag 9. One end of the hose 8 is closed, and the other end is installed on the fire extinguishing airbag 9. The fire extinguishing airbag 9 is filled with fire extinguishing gas, and the fire extinguishing gas is preferably carbon dioxide.

[0026] The cable body comprises a plurality of insulating wires and a wrapping layer for wrapping the insulating wires. The wrapping layer comprises an outer sheath 3, a metal shielding layer 4, an outer tape layer 12 and an inorganic heat absorption layer 5 from the inside to the outside. The inorganic heat absorption layer 5 is an inorganic insulation material.

[0027] A filling layer 6 is provided between the insulating wire and the wrapping layer.

[0028] The insulated wire comprises a wire core 1 , and the outer portion of the wire core 1 is wrapped with an inner sheath 2 .

[0029] The fire extinguishing airbag 9 is connected to a plurality of air outlet pipes 10 , on which a switch valve 11 is installed, and the hose 8 is connected to the air outlet pipe 10 .

[0030] When in use, after the cable is laid, the hose 8 is connected to the corresponding air outlet pipe 10, and the switch valves 11 on all the air outlet pipes 10 connected to the hose 8 are opened. When a fire occurs, if the fire spreads to the cable, the corresponding hose 8 will be melted, so that the fire extinguishing gas in the fire extinguishing airbag 9 will be released, and the fire extinguishing gas will be diffused near the cable, which will isolate the air and reduce the fire, thereby protecting the cable and extending the alarm time of the alarm.

[0031] Each embodiment in this specification is described in a progressive manner, and the same or similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the system embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment.

[0032] The above description is only an embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent substitution, improvement, etc. made within the spirit and principle of the present invention shall be included in the scope of the claims of the present invention.

Claims

1. A fire alarm fire-resistant cable, comprising a cable body, a plurality of grooves (7) are arranged on the outside of the cable body, characterized in that: A hose (8) is fixed in the groove (7), and the cable also includes a fire extinguishing airbag (9). One end of the hose (8) is closed, and the other end is mounted on the fire extinguishing airbag (9). The fire extinguishing airbag (9) is filled with fire extinguishing gas.

2. A fire alarm fire-resistant cable according to claim 1, characterized in that: The groove (7) is spiral-shaped.

3. A fire alarm fire-resistant cable according to claim 2, characterized in that: The cable body includes a plurality of insulating wires and a wrapping layer for wrapping the insulating wires.

4. A fire alarm fire-resistant cable according to claim 3, characterized in that: The wrapping layers are, from the inside to the outside, an outer sheath (3), a metal shielding layer (4), an outer tape layer (12), and an inorganic heat absorption layer (5).

5. A fire alarm fire-resistant cable according to claim 4, characterized in that: A filling layer (6) is provided between the insulating wire and the wrapping layer.

6. A fire alarm fire-resistant cable according to claim 5, characterized in that: The insulated wire comprises a wire core (1), the outside of which is wrapped with an inner sheath (2).

7. A fire alarm fire-resistant cable according to claim 6, characterized in that: The fire extinguishing airbag (9) is connected to a plurality of air outlet pipes (10), and the hose (8) is connected to the air outlet pipes (10).

8. A fire alarm fire-resistant cable according to claim 7, characterized in that: The air outlet pipe (10) is provided with an on-off valve (11).

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