Special cold-resistant flexible cable for flame-retardant shielding type aviation obstruction beacon

Abstract

The utility model relates to the technical field of cables, in particular to a special cold-resistant flexible cable for a flame-retardant shielding type aviation obstruction beacon, which comprises a cable core as well as a cabling wrapping layer and a sheath layer which are sequentially coated outside the cable core, and is characterized in that the cable core is formed by twisting three main cable cores and two auxiliary cable cores; a filling layer is filled in a middle twisting gap and a peripheral twisting gap of the three main wire cores and the two auxiliary wire cores; each main wire core comprises a wire core conductor, and an insulating layer, a fire-resistant wrapping layer and a braided shielding layer are sequentially coated outside each wire core conductor; each auxiliary wire core comprises a wire core conductor, and the exterior of each wire core conductor is sequentially coated with an insulating layer and a fireproof wrapping layer. According to the utility model, the current breakdown phenomenon caused by too high temperature when the existing cable works is solved, the problems that the cable sheath is easy to crack and the cable is accelerated to age in cold weather are solved, and the structure can keep stable operation under complex natural conditions and in an environment with electromagnetic wave interference.

Description

TECHNICAL FIELD

[0001] The utility model relates to cable technical field especially relates to a kind of flame-retardant shielding type aviation obstruction light special cold-resistant flexible cable. BACKGROUND

[0002] Aviation obstruction light special cable is mainly used for transmission and distribution cable, often used in airport clearance protection area superhigh building setting obstruction light circuit, artificial and natural obstruction object setting obstruction light circuit on airport air route and around flight area, obstruction light circuit set by public security, fire control, traffic and other departments around the high building and construction in city apron, etc., airport is generally in suburb or relatively open place, summer temperature is more hot compared with city, winter is more cold compared with city, obstruction light is exposed in airport outdoor all the year round, which puts forward higher requirements on flame-retardant and cold-resistant performance of obstruction light connecting cable. UTILITY MODEL CONTENTS

[0003] The utility model discloses a kind of flame-retardant shielding type aviation obstruction light special cold-resistant flexible cable, applicable to AC rated voltage 450 / 750V and below control, signal, protection and measurement circuit, mainly can be used on warning in the height limit or superhigh building of aviation airport or city apron clearance protection area, artificial and natural obstruction object on airport air route and around flight area influence flight safety.

[0004] To achieve the above object, the utility model adopts the following technical scheme:

[0005] A kind of flame-retardant shielding type aviation obstruction light special cold-resistant flexible cable, including cable core and cable winding layer 5 and sheath layer 6 covered in cable core outside in sequence, it is characterized in that: the cable core is stranded by three main line cores and two auxiliary line cores, and the middle stranded gap and the peripheral stranded gap of the three main line cores and two auxiliary line cores are filled with filling layer 7;The main line core includes line core conductor 1, the outside of the line core conductor 1 is covered with insulating layer 2, fire-resistant wrapping layer 3 and braided shielding layer 4 in sequence;The auxiliary line core includes line core conductor 1, and the outside of the line core conductor 1 is covered with insulating layer 2 and fire-resistant wrapping layer 3 in sequence.

[0006] The line core conductor 1 uses multiple fine stranded tinned copper wire, and tinned copper has good conductivity, welding performance and oxidation resistance. The conductor surface is required to be round, smooth, without burr, and without missing welding.

[0007] The insulation layer 2 is extruded by cross-linked polyethylene insulation material, and the linear molecular structure is changed into three-dimensional network molecular structure by warm water cross-linking, the thermoplastic material is changed into thermosetting material, the working temperature is increased from 70℃ to 90℃, the material performance is significantly improved, the long-term working temperature of the cross-linked polyethylene insulated cable can be increased to 90℃, the instantaneous short-circuit temperature can reach 250℃, the chemical stability is high, the environmental stress cracking resistance is strong, the mechanical strength is high, the safety is good, the advantages of anti-tension and wear resistance, and the thermal life can reach forty years.

[0008] The fire-resistant wrapping layer 3 adopts mica paper layer, and the polyester film tape covered on the surface of the mica paper layer can increase the moisture resistance of the mica tape, and has the advantages of high tensile strength, high elastic coefficient, high compressive strength, high fire resistance, good flatness, not easy to delaminate, acid and alkali resistance, anti-corona and the like.

[0009] The braided shielding layer 4 is woven by tinned copper wire, which can not only prevent copper wire oxidation and resist high temperature, but also effectively reduce line interference and eliminate the induction effect of electromagnetic interference, and reduce the interference to adjacent components as much as possible.

[0010] The cabling wrapping layer 5 adopts high-temperature-resistant ceramicized silicone rubber tape, which has excellent fireproof, flame-retardant, low-smoke, non-toxic and other properties, and the surface residue after combustion is a hard ceramic shell, and the longer the ablation time and the higher the temperature, the more obvious the ceramic effect, the hard shell does not melt and drip in the case of fire, and is non-toxic, odorless at room temperature, has good softness and mechanical strength.

[0011] The sheath layer 6 adopts polyurethane (PUR) sheath material, which has outstanding cold resistance and still maintains good elasticity, flexibility and other physical properties at minus 40 degrees; PUR has high mechanical strength, and the corresponding cable has outstanding load capacity, impact resistance and shock absorption performance, and also has good weather resistance, excellent oil resistance, toughness, wear resistance, cold resistance (low temperature resistance), water resistance, aging resistance, acid and alkali resistance, climate resistance, long service life, anti-ultraviolet and many other excellent functions, and is suitable for extremely harsh environments such as outdoor environment.

[0012] The filling layer 7 adopts alkali-free glass silk rope, which is twisted by alkali content less than 0.8% alkali-free glass fiber, and has high heat resistance and insulation, high tensile strength and small elongation.

[0013] The utility model discloses a beneficial effect lies in: the utility model discloses novel structure, convenient operation, add fire -resistant layer on the conductor, add shielding layer around main insulated wire core, cable wrapping, fill in and use flame -retardant material, sheath has wear -resisting, cold -resistant (low temperature resistance), water -resistant, ageing -resistant, acid -resistant, weather -resistant, long service life, many excellent functions such as ultraviolet resistance, the whole cable not only has good flame -retardant effect, but also can resist severe cold weather, resist strong ultraviolet, and the shielding layer around main wire core can effectively prevent internal or external electromagnetic wave cross interference, and the special safety grounding wire can guarantee that obstruction light system reliably ground. Solve the current cable work because temperature is too high and cause current breakdown phenomenon, solve the cable sheath under cold weather easily crack, cable ageing -resistant problem, and the structure can keep stable operation in complex natural conditions and the environment with electromagnetic wave interference. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is the structural schematic diagram of the utility model.

[0015] In the drawing: 1, conductor; 2, insulating layer; 3, fire -resistant wrapping layer; 4, main wire core weaving shielding layer; 5, cable wrapping layer; 6, sheath layer; 7, filler. DETAILED DESCRIPTION

[0016] The technical scheme in the embodiments of the utility model will be described clearly and completely below in combination with the drawings in the embodiments of the utility model, and apparently, the described embodiments are only part of the embodiments of the utility model, not all the embodiments.

[0017] Embodiment 1

[0018] A kind of flame -retardant shielding type aviation obstruction light special cold -resistant soft cable, including cable core and the cable wrapping layer 5 and sheath layer 6 successively covered in cable core exterior, it is characterized in that: the cable core is twisted into by three main wire cores and two auxiliary wire cores, and the middle twisted gap and the peripheral twisted gap of the three main wire cores and two auxiliary wire cores are filled with filler layer 7;The main wire core includes wire core conductor 1, and the outside of the wire core conductor 1 is successively covered with insulating layer 2, fire -resistant wrapping layer 3 and weaving shielding layer 4;The auxiliary wire core includes wire core conductor 1, and the outside of the wire core conductor 1 is successively covered with insulating layer 2 and fire -resistant wrapping layer 3.

[0019] The wire core conductor 1 uses multiple fine twisted tinned copper wire, and tinned copper has good conductivity, welding performance and oxidation resistance. The conductor surface is required to be round, smooth, without burr, and without missing welding.

[0020] The insulating layer 2 is extruded by cross-linked polyethylene insulating material, and the linear molecular structure is changed into three-dimensional network molecular structure by the way of cross-linking with warm water, the thermoplastic material is changed into thermosetting material, the working temperature is increased from 70 DEG C to 90 DEG C, the material performance is improved obviously, the long-term working temperature of the cross-linked polyethylene insulated cable can be increased to 90 DEG C, the instantaneous short-circuit temperature can reach 250 DEG C, the cable will not decompose and carbonize at 200 DEG C and below, the chemical stability is high, the environmental stress cracking resistance is strong, the mechanical strength is high, the safety is good, the cable has the advantages of tensile resistance and wear resistance, and the thermal life can reach forty years.

[0021] The fire-resistant wrapping layer 3 adopts mica paper layer, and the polyester film tape covered on the surface of the mica paper layer can increase the moisture resistance of the mica tape, and the mica paper layer has the advantages of high tensile strength, high elastic coefficient, high compressive strength, high fire resistance, good flatness, not easy to delaminate, acid and alkali resistance, anti-corona and the like.

[0022] The braided shielding layer 4 is woven by tinned copper wire, and the tinned copper can not only prevent the oxidation of the copper wire and resist high temperature, but also can effectively reduce the line-to-line interference and eliminate the induction effect of electromagnetic interference, so as to reduce the interference on the adjacent components as much as possible.

[0023] The cabling wrapping layer 5 adopts high-temperature-resistant ceramicized silicone rubber tape, which has excellent fireproof, flame-retardant, low-smoke, non-toxic and other characteristics, and the surface residue after combustion is a hard ceramic shell, and the longer the ablation time and the higher the temperature, the more obvious the ceramic effect, the hard shell does not melt and drip in the case of fire, and has no odor, good softness and mechanical strength at room temperature.

[0024] The sheath layer 6 adopts polyurethane (PUR) sheath material, and the PUR has outstanding cold resistance, and still maintains good elasticity, flexibility and other physical properties at minus 40 degrees; the PUR has high mechanical strength, and the corresponding cable has outstanding load capacity, impact resistance and damping performance, and also has good weather resistance, excellent oil resistance, good toughness, wear resistance, cold resistance (low temperature resistance), water resistance, aging resistance, acid and alkali resistance, climate resistance, long service life, anti-ultraviolet and many other excellent functions, and is suitable for extremely harsh environments such as outdoor environments.

[0025] The filling layer 7 adopts alkali-free glass silk rope, which is twisted by alkali content less than 0.8% alkali-free glass fiber, and the glass rope has high heat resistance and insulation, and has high tensile property and small elongation.

[0026] Example 2

[0027] The process scheme of the utility model is as follows:

[0028] 1. The conductor 1 is a 5th type of tin-plated soft copper conductor required by GB / T 3956-2008, the strand direction of the strand is right, and the reeling direction is left. The reeled conductor should not have the phenomena of missing strand, loose strand and broken strand, the conductor is uniformly and closely reeled, the surface should be smooth, and should not have the defects of oil stain, burr, sharp edge, scratch and protrusion.

[0029] 2. The insulation layer 2 is color-separated by color master separation, the insulation layer has a nominal thickness, the thinnest point of the insulation layer is not less than the nominal value x 90%-0.1mm, and the surface is required to be smooth, without old glue, scratch and other defects. Warm water is used for crosslinking after extrusion.

[0030] 3. The fire-resistant wrapping layer 3 is wrapped by two mica tape, the wrapping overlap rate is 20%-30% of the tape width, and the width and thickness of the mica tape are uniform, without burr, wrinkle, damp stain and other defects.

[0031] 4. The braided shielding layer 4: a layer of tin-plated copper wire braided mesh is added around the main conductor to increase the shielding effect, and the shielding rate is greater than or equal to 85%.

[0032] 5. The filling layer 7: alkali-free glass silk rope is selected as the filling layer.

[0033] 6. The cabling wrapping layer 5: the cabling wrapping layer is wrapped by a layer of high-temperature-resistant ceramicized silicone rubber tape, the width and thickness of the tape are uniform, the surface should be flat, smooth, uniform, without impurities, wrinkle, and other mechanical damage, the adjacent layers are oppositely wrapped, the wrapping overlap rate is 20%-30% of the tape width. The wrapping overlap should be uniform. After wrapping, the surface should not have the phenomena of wrinkling, edge turning, missing wrapping, flash joint or uneven outer diameter, and the joint should be firm.

[0034] 7. The sheath layer 6: the extruded outer sheath should be smooth, uniform, round, tight, without defects such as concave, burning, edge, hole, joint, bamboo joint, roughness, pore, and the like, the printed mark should be correct, continuous, clear and resistant to rubbing. The non-circularity of the cable should be less than 15% (the non-circularity of the cable = (the maximum outer diameter of the cable-the minimum outer diameter of the cable) / the maximum outer diameter of the cable x 100%).

[0035] The above is only a preferred specific implementation of the present application, but the protection scope of the present application is not limited to this. The replacement can be a partial structure, device, method step replacement, or a complete technical solution. According to the technical solution and the application concept of the present application, equivalent replacement or change should be covered in the protection scope of the present application.

Claims

1. A flame-retardant shielding type cold-resistant flexible cable for special aviation obstacle lamp, comprising a cable core and a cabling wrapping layer (5) and a sheath layer (6) successively wrapped outside the cable core, characterized in that: The cable core is twisted by three main cores and two auxiliary cores, and the middle and peripheral twisting gaps of the three main cores and two auxiliary cores are filled with a filling layer (7); the main core comprises a core conductor (1), and the outside of the core conductor (1) is sequentially coated with an insulation layer (2), a fire-resistant wrapping layer (3) and a braided shielding layer (4); the auxiliary core comprises a core conductor (1), and the outside of the core conductor (1) is sequentially coated with an insulation layer (2) and a fire-resistant wrapping layer (3).

2. The flame-retardant shielding type cold-resistant flexible cable for special aviation obstacle lamp according to claim 1, characterized in that: The core conductor (1) is made of multiple strands of fine twisted tinned copper wire.

3. The flame-retardant shielding type aviation obstacle lamp special cold-resistant flexible cable according to claim 1, characterized in that: The insulation layer (2) is extruded by cross-linked polyethylene insulation material.

4. The flame-retardant shielding type aviation obstacle lamp special cold-resistant flexible cable according to claim 1, characterized in that: The fire-resistant wrapping layer (3) is made of phlogopite mica paper layer, and the surface of the phlogopite mica paper layer is covered with a polyester film tape.

5. The flame-retardant shielding soft cable for special aviation obstacle lamp according to claim 1, characterized in that: The braided shielding layer (4) is made of tinned copper wire.

6. The flame-retardant shielding soft cable for special aviation obstacle lamp according to claim 1, characterized in that: The cabling wrapping layer (5) is made of high-temperature-resistant ceramicized silicone rubber tape.

7. The flame-retardant shielding soft cable for special aviation obstacle lamp according to claim 1, characterized in that: The sheath layer (6) is made of polyurethane (PUR) sheath material.

8. The flame-retardant shielding soft cable for special aviation obstacle lamp according to claim 1, characterized in that: The filling layer (7) is made of alkali-free glass fiber rope, which is twisted by alkali-free glass fiber with an alkali content of less than 0.8%.

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