Halogen-free low-smoke flame-retardant fireproof mining communication cable for coal mine

Abstract

The utility model provides a halogen-free low-smoke flame-retardant fire-resistant mining communication cable for a coal mine, which comprises a plurality of wire core conductors, the plurality of wire core conductors are lapped by insulating wires to form an insulating wire core, two insulating wire cores are twisted to form an insulating wire pair, a polyester tape is lapped outside the insulating wire pair, and the polyester tape is lapped outside the insulating wire pair. A plurality of insulating wire pairs wrapped with polyester tapes and the optical cable assembly are twisted into a cable core, an aluminum-plastic tape is arranged outside the cable core, a polyethylene sheath is extruded outside the aluminum-plastic tape, a fireproof layer is wrapped outside the polyethylene sheath, a steel wire armor layer is arranged outside the fireproof layer, a glass fiber tape is wrapped outside the steel wire armor layer, and an outer sheath is extruded outside the glass fiber tape. According to the utility model, the cable cores composed of the cable core conductors, the insulated wires and the metal shield are used for transmitting electric signals, the optical cable assembly is arranged in the cable core for acquiring optical signal transmission, the dual functions of the cable are realized, and the optical cable assembly and the communication cable core are twisted together, so that the cable space is not occupied, the number of the cable cores in the cable core is reduced, and the cost is reduced. The external diameter of the cable is reduced, and the laying cost is reduced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to cable technical field, concretely relates to a kind of coal mine is with halogen-free low smoke flame-retardant fire-resistant mine communication cable. BACKGROUND

[0002] The existing cable, the function is relatively single, occupies large space, and the laying difficulty is also big, thus requires that in addition to the main function of cable transmission electric signal, it also needs to have optical signal transmission function, so as to save manufacturing, transportation, installation construction and labor cost, improve the utilization rate of space and line.The method used in the prior art is to twist optical fiber with optical signal transmission function and communication transmission core in the same cable core to realize the double function of cable.

[0003] With the development of economy and technology, people require to improve the space utilization rate of coal mine, and the safety and environmental protection consciousness of cable are also enhanced, and the current cable material mostly uses PVC, which is not conducive to environmental protection, and cannot play the role of flame-retardant and fire-resistant.

[0004] The current mine cable has only electric signal transmission function or only optical signal transmission function, and the use function is relatively single, and the cable for transmitting two kinds of signals usually is laid separately, which is high in cost and inconvenient to install, and the current mine cable material mostly uses PVC, which is not conducive to environmental protection, and cannot play the role of flame-retardant and fire-resistant.The PVC sheath material generates a large amount of smoke when fire occurs, which is not conducive to rescue or fire extinguishing in mine, and has no fire-resistant performance, so that the cable will immediately lose its function in slight fire, which reduces the reliability of cable in fire. SUMMARY

[0005] The utility model discloses a kind of coal mine is with halogen-free low smoke flame-retardant fire-resistant mine communication cable, and light signal, electric signal are based on integration, avoid the problem that light signal and electric signal are laid separately, solve the problem that cable overall weight is heavy, bulky and cable generates a large amount of smoke and toxic gas in open fire and has no fire-resistant performance.

[0006] To achieve the above technical purpose, the utility model adopts the technical scheme that:

[0007] A kind of coal mine is with halogen-free low smoke flame-retardant fire-resistant mine communication cable, wherein, including multiple line core conductors, multiple line core conductors are constructed after being wrapped by insulated wire, two insulated wires are twisted to form insulated wire pair, the insulated wire pair is wrapped by polyester tape outside, multiple insulated wire pairs of wrapped polyester tape and optical cable assembly are twisted into cable to form cable core, aluminum plastic tape is arranged outside the cable core, polyethylene sheath is extruded and packed outside the aluminum plastic tape, fire-resistant layer is wrapped outside the polyethylene sheath, steel wire armor layer is arranged outside the fire-resistant layer, glass fiber tape is wrapped outside the steel wire armor layer, and outer sheath is extruded and packed outside the glass fiber tape.

[0008] Preferably, the coal mine halogen-free low smoke retardant fire-resistant mine communication cable, wherein the material of the insulating wire is polyethylene, and the thickness of the insulating wire core is greater than or equal to 0.05 mm.

[0009] Preferably, the coal mine halogen-free low smoke retardant fire-resistant mine communication cable, wherein the overlapping lap rate of the polyester tape is greater than or equal to 15%, and the wrapping direction is left.

[0010] Preferably, the coal mine halogen-free low smoke retardant fire-resistant mine communication cable, wherein the overlapping width of the aluminum plastic tape is greater than or equal to 6 mm.

[0011] Preferably, the coal mine halogen-free low smoke retardant fire-resistant mine communication cable, wherein the aluminum plastic tape comprises an aluminum tape and plastic layers arranged on both sides of the aluminum tape, the thickness of the aluminum plastic tape is 0.2-0.3 mm, and the thickness of the plastic layer is 0.04-0.06 mm; the material of the fire-resistant layer is a ceramicized silica gel mica tape.

[0012] Preferably, the coal mine halogen-free low smoke retardant fire-resistant mine communication cable, wherein the insulating wire pairs of the plurality of wrapping polyester tapes constitute a first insulating wire core group and a second insulating wire core group, the second insulating wire core group is arranged outside the first insulating wire core group, and the optical cable assembly is arranged at the insulating wire pair gap in the second insulating wire core group.

[0013] Preferably, the coal mine halogen-free low smoke retardant fire-resistant mine communication cable, wherein the optical cable assembly comprises a tight-wound fiber core, a spiral armor layer, an aramid yarn layer and a polyolefin sheath arranged from inside to outside.

[0014] The technical scheme provided by the embodiment of the utility model has the beneficial effects that:

[0015] (1) The coal mine halogen-free low smoke retardant fire-resistant mine communication cable of the utility model utilizes the wire core conductor, the insulating wire and the metal shielding to transmit electric signals, and the optical cable assembly is built-in in the cable core to obtain optical signal transmission, thereby realizing the dual function of the cable, twisting the optical cable assembly and the communication cable core together, which does not occupy the cable space, reduces the number of cable cores in the cable core, reduces the outer diameter of the cable and reduces the laying cost.

[0016] (2) the utility model discloses a coal mine is with halogen -free low smoke flame -retardant fire -resistant mine communication cable, cable sheath structure adopts the structure that fire -resistant layer and outer sheath combine, and only a small part of cable material burns in the open fire in the combustion, therefore the smoke that will produce will be less, and the fire -resistant layer can more effectively isolate the open fire, and the harm of fire to the inside of cable is reduced to the maximum, thereby improving the reliability in the cable fire, and the sheath material adopts low smoke halogen -free polyolefin material, and the material does not contain halogen, and has flame -retardant performance, thereby realizing low smoke, halogen -free, low toxicity performance when burning. BRIEF DESCRIPTION OF DRAWINGS

[0017] Fig. 1 It is the structure schematic diagram of the utility model's coal mine is with halogen -free low smoke flame -retardant fire -resistant mine communication cable.

[0018] Fig. 2 It is the structure schematic diagram of the utility model's optical cable assembly. DETAILED DESCRIPTION

[0019] In the description of the utility model, it is understood that the orientation words such as "in, out", "up, down", "front, back" and the like indicated orientation or position relationship is usually based on the orientation or position relationship shown in the drawing, just for the convenience of describing the utility model and simplifying the description, in the absence of the opposite statement, these orientation words do not indicate and imply the orientation or position of the indicated device or element must have a particular or a particular orientation and operation, therefore it can not be understood as the limitation of the protection scope of the utility model.

[0020] In order to make the purpose, technical scheme and advantage of the utility model more clear and obvious, the utility model is further described in detail below by combining with the drawings and examples. It should be understood that the specific examples described here are only used to explain the utility model, and are not used to limit the utility model.

[0021] As Figs. 1-2 , a coal mine is with halogen -free low smoke flame -retardant fire -resistant mine communication cable, wherein, including multiple wire core conductors, multiple wire core conductors are wrapped after the insulation wire and constitute the insulation wire core, two insulation wire cores are twisted to form insulation wire pair 1, the insulation wire pair 1 is wrapped with polyester tape 2, the insulation wire pair 1 and optical cable assembly 3 of multiple wrapped polyester tapes 2 are twisted into cable core, the cable core is provided with aluminum plastic tape 4 outside, the aluminum plastic tape 4 is extruded with polyethylene sheath 5, the polyethylene sheath 5 is wrapped with fire -resistant layer 6, the fire -resistant layer 6 is provided with steel wire armor layer 7, the steel wire armor layer 7 is wrapped with glass fiber tape 8, and the glass fiber tape 8 is extruded with outer sheath 9.

[0022] The material of the insulation wire is polyethylene, the thickness of the insulation wire core is greater than or equal to 0.05mm, the overlapping lap rate of the polyester tape 2 is greater than or equal to 15%, and the wrapping direction is left; the overlapping width of the aluminum plastic tape 4 is greater than or equal to 6mm.

[0023] The aluminum-plastic tape 4 includes an aluminum tape and plastic layers arranged on both sides of the aluminum tape, the thickness of the aluminum-plastic tape 4 is 0.2-0.3 mm, and the thickness of the plastic layer is 0.04-0.06 mm; the material of the fire-resistant layer 6 is a ceramicized silica gel mica tape; the multiple wrapped polyester tapes 2 form a first insulated wire core group and a second insulated wire core group, the second insulated wire core group is arranged on the outer periphery of the first insulated wire core group, and the optical cable assembly 3 is arranged at the gap of the insulated wire pairs 1 in the second insulated wire core group; the optical cable assembly 3 includes, from inside to outside, a tightly wrapped fiber core 31, a spiral armor layer 32, an aramid yarn layer 33, and a polyolefin sheath 34.

[0024] The wire core conductor is made of high-quality oxygen-free copper, and has a volume resistivity of 0.01715 Ω·mm / m at 20°C 2 The insulated wire is made of low-dielectric-loss polyethylene insulation material and is extruded on the conductor, and the thinnest point is controlled to be 0.05 mm, so that the outer diameter of the insulated wire pair is uniform, the working capacitance between the twisted wires is ≤0.06 μF / km; the optical cable assembly 3 is arranged in sequence from inside to outside, including a tightly wrapped fiber core 31, a spiral armor layer 32, an aramid yarn layer 33, and a polyolefin sheath 34, the optical cable assembly 3 and the insulated wire pair 1 are twisted together to form a cable, and the structure is stable; the cable core is wrapped with a layer of polyester tape 2, the overlapping coverage rate is not less than 15%, the wrapping direction is left, the wrapping is flat, there is no missing wrapping, and the actual pitch of the cable is controlled to be not more than 20 times of the outer diameter of the cable.

[0025] The cable core is wrapped with a layer of aluminum-plastic tape 4 outside, the aluminum-plastic tape 4 is a polyethylene type double-sided plastic coated aluminum tape, the aluminum tape should completely cover the cable core, the overlapping width is not less than 6 mm, the nominal thickness of the plastic coated aluminum tape is 0.2-0.3 mm, it is double-sided plastic coated, the nominal thickness of the plastic layer is 0.04-0.06 mm, in order to increase the softness of the cable, the aluminum-plastic composite tape is knotted, the thickness of the knotted aluminum tape is reduced by not more than 10% at any point, and the aluminum tape should have electrical continuity throughout the cable.

[0026] The aluminum-plastic tape 4 is tightly extruded with a layer of black polyethylene sheath 5, and the aluminum-plastic tape 4 and the polyethylene sheath 5 cooperate to have a moisture-proof function; the cable armor layer 7 for a vertical shaft should be made of fine round galvanized steel wire armor, which can withstand tension; the fire-resistant layer 6 is a ceramicized silica gel mica tape, which can prevent flame from penetrating through the armor gap and has good heat insulation effect, the manufacturer of the ceramicized silica gel mica tape is Xiqide High Polymer Material Technology Co., Ltd. in Yixing; the outer sheath 9 is a halogen-free polyolefin sheath material, which is tightly extruded on the glass tape 8.

[0027] The utility model discloses a preparation process: the conductor of the online core is extruded and is packed with the insulating wire to form the wire core conductor, and two insulating wire cores are twisted, and the insulating wire pair 1 is prepared, and the insulating wire pair 1 is wrapped with the polyester tape 2, and then the insulating wire pair 1 and the optical cable assembly 3 are twisted into the cable core, and then the aluminum plastic tape 4 is wrapped outside the cable core, and then the polyethylene sheath 5 is extruded and packed outside the aluminum plastic tape 4, and then the fireproof layer 6 is wrapped outside the polyethylene sheath 5, and then the cable armor layer 7 is armored outside the fireproof layer, and finally the glass fiber tape 8 is wrapped outside the steel wire armor layer 7, and the outer sheath 9 is extruded and packed outside the glass fiber tape 8.

[0028] The utility model discloses a coal mine uses halogen-free low smoke flame -retardant fire -resistant mine communication cable, utilizes the wire core conductor, insulating wire, metal shield and forms the wire core transmission electric signal, and the optical cable assembly is built -in in the cable core to obtain the light signal transmission, realizes the double function of cable, and the optical cable assembly and communication cable core are twisted together, so this does not occupy the cable space, reduces the cable core in cable cable core's core number, reduces the outer diameter of cable, and reduces the laying cost.

[0029] The utility model discloses a coal mine uses halogen-free low smoke flame -retardant fire -resistant mine communication cable, and the cable sheath structure adopts the structure that the fire -resistant layer and the outer sheath combine, and only a small part of cable material in the cable burns in the open fire in the combustion, and therefore the smoke produced will be less, and the fire -resistant layer can more effectively isolate the open fire, and the harm of fire to the inside of cable is reduced to the maximum, thereby improving the reliability in the cable fire, and the sheath material adopts the low smoke halogen -free polyolefin material, and the material does not contain halogen, and has the flame -retardant performance, thereby realizing the low smoke, halogen -free, low toxicity performance when burning.

[0030] Finally, it should be explained that the above specific embodiments are only used to illustrate the technical scheme of the utility model and not to limit, and although the utility model is described in detail with reference to the examples, those skilled in the art should understand that the technical scheme of the utility model can be modified or replaced equivalently without departing from the spirit and scope of the technical scheme of the utility model, and they should be covered in the scope of the claims of the utility model.

Claims

1. A halogen-free, low-smoke, flame-retardant, fire-resistant mining communication cable for coal mines, characterized in that, The application relates to a cable, which comprises a plurality of core conductors, the plurality of core conductors are wrapped by insulating wires to form insulating wire cores, two insulating wire cores are twisted to form an insulating wire pair (1), the insulating wire pair (1) is wrapped by a polyester tape (2) outside, a plurality of insulating wire pairs (1) wrapped by the polyester tape (2) and an optical cable assembly (3) are twisted to form a cable core, an aluminum-plastic tape (4) is arranged outside the cable core, a polyethylene sheath (5) is extruded and wrapped outside the aluminum-plastic tape (4), a fire-resistant layer (6) is wrapped outside the polyethylene sheath (5), a steel wire armor layer (7) is arranged outside the fire-resistant layer (6), a glass fiber tape (8) is wrapped outside the steel wire armor layer (7), and an outer sheath (9) is extruded and wrapped outside the glass fiber tape (8).

2. The coal mine communication cable according to claim 1, wherein, The material of the insulating wire is polyethylene, and the thickness of the insulating wire core is greater than or equal to 0.05 mm.

3. The coal mine communication cable according to claim 1, wherein, The overlapping lap rate of the polyester tape (2) is greater than or equal to 15%, and the wrapping direction is left.

4. The coal mine communication cable according to claim 1, wherein, The overlapping width of the aluminum-plastic tape (4) is greater than or equal to 6 mm.

5. The coal mine communication cable according to claim 1, wherein, The aluminum-plastic tape (4) comprises an aluminum tape and plastic layers arranged on both sides of the aluminum tape, the thickness of the aluminum-plastic tape (4) is 0.2-0.3 mm, the thickness of the plastic layer is 0.04-0.06 mm, and the material of the fire-resistant layer (6) is a ceramicized silica gel mica tape.

6. The coal mine communication cable according to claim 1, wherein, The plurality of insulating wire pairs (1) wrapped by the polyester tape (2) form a first insulating wire core group and a second insulating wire core group, the second insulating wire core group is arranged outside the first insulating wire core group, and the optical cable assembly (3) is arranged at the space of the insulating wire pairs (1) in the second insulating wire core group.

7. The coal mine communication cable according to claim 6, wherein, The optical cable assembly (3) comprises, from inside to outside, a tight wrapping fiber core (31), a spiral armor layer (32), an aramid yarn layer (33) and a polyolefin sheath (34).

Images