A special cable for aviation equipment

Abstract

The present invention relates to the field of cable technology, and in particular to a special cable for aviation equipment, including several groups of cable core units, the outer side of the cable core unit is wrapped with an outer sheath, and a flame retardant layer is arranged between the outer sheath and the cable core unit; the outer side of the inner sheath is provided with an outer shielding layer, and the outer side of the outer shielding layer is provided with a heat insulation flame retardant layer; the outer side of the heat insulation flame retardant layer is formed with a heat conduction layer, and the outer side of the heat conduction layer is formed with a high temperature resistant layer; a plurality of ventilation holes are arranged at equal angles in the heat conduction layer, and both ends of the ventilation holes pass through the cable ends, and a ventilation assembly connected to the ventilation holes is arranged on the outer side of the cable; and the wind shield assembly is detachably connected to both ends of the cable. By adopting the above technical scheme, the high temperature resistance requirements and fire resistance performance in a specific environment can be met.

Description

Technical Field

[0001] The present invention relates to the technical field of cables, and in particular to a special cable for aviation equipment. Background Art

[0002] As we all know, the aerospace industry is an important strategic industry in the national economy. Wires and cables, as the nerves and blood vessels of aerospace, are directly related to the safety, reliability, advancement and combat capability of aerospace vehicles.

[0003] In aviation equipment, there are some special cables that are required to maintain normal operation in a specific environment. For example, in terms of high temperature resistance and fire resistance, the existing technology generally uses fireproof materials and high temperature resistant materials on the outside of the cable. Although this method can achieve fire and high temperature resistance, this fire and high temperature resistant cable cannot meet the high temperature resistance requirements and fire resistance performance in a specific environment, and its high temperature resistance and fire resistance performance need to be further improved. Summary of the invention

[0004] 1. Technical issues to be resolved

[0005] In view of the deficiencies in the prior art, the present invention provides a special cable for aviation equipment, which can meet the high temperature resistance and fire protection requirements under specific environments.

[0006] (II) Technical solution

[0007] To achieve the above-mentioned objectives, an embodiment of the present application provides a special cable for aviation equipment, comprising several groups of cable core units, the outer side of the cable core unit is wrapped with an outer sheath, and a flame retardant layer is arranged between the outer sheath and the cable core unit; an outer shielding layer is arranged on the outer side of the inner sheath, and a heat insulating flame retardant layer is arranged on the outer side of the outer shielding layer; a heat conductive layer is formed on the outer side of the heat insulating flame retardant layer, and a high temperature resistant layer is formed on the outer side of the heat conductive layer; a plurality of ventilation holes are arranged at equal angles in the heat conductive layer, both ends of the ventilation holes pass through the cable ends, and a ventilation assembly connected to the ventilation holes is arranged on the outer side of the cable; both ends of the cable are detachably connected with a wind shield assembly.

[0008] Preferably, the cable core unit comprises a conductor, the outer side of the conductor is wrapped with an insulating layer, the outer side of the insulating layer is provided with an inner sheath, the outer side of the inner sheath is provided with an inner shielding layer, and the outer side of the inner shielding layer is provided with a fireproof layer.

[0009] Preferably, the heat-conducting layer is provided with a plurality of annular channels at intervals along the length direction of the cable, and the annular channels are connected to the ventilation holes.

[0010] Preferably, the high temperature resistant layer is provided with annular grooves along the length direction of the cable and at a set distance therebetween, and a plurality of connecting holes are formed at the bottom of the annular groove, and the connecting holes are respectively connected to one of the ventilation holes; the ventilation component comprises a first ventilation half ring and a second ventilation half ring in a semicircular shape, the first ventilation half ring and the second ventilation half ring are embedded in the annular groove and are connected to each other; a ventilation cavity is formed on the inner sides of the first ventilation half ring and the second ventilation half ring, and an air duct is arranged on the inner sides of the first ventilation half ring and the second ventilation half ring, the air duct is connected to the ventilation cavity, and the other end is inserted into the connecting hole and is sealed with the connecting hole; an air inlet duct is arranged on the outer sides of the first ventilation half ring and the second ventilation half ring.

[0011] Preferably, the wind shield assembly includes a wind shield ring, the inner diameter of which is larger than the inner diameter of the heat insulating and flame retardant layer and smaller than the inner diameter of the heat conductive layer; a plurality of wind shield columns are integrally formed on one side of the wind shield ring close to the cable, and the wind shield columns are inserted into the ventilation holes and sealedly connected to the ventilation holes.

[0012] Preferably, the cable core units are provided in three groups, and a reinforcing core is provided in the middle of the three groups of the cable core units.

[0013] Preferably, the outer shielding layer and / or the inner shielding layer is a quartz wire fireproof shielding layer.

[0014] Preferably, the inner sheath and the outer sheath are made of halogen-free flame-retardant material.

[0015] Preferably, the flame retardant layer is made of polyolefin filling.

[0016] (III) Beneficial effects

[0017] The present invention provides a characteristic cable for aviation equipment, which has super high temperature resistance and fireproof performance. The high temperature resistant layer on the outside has a preliminary flame retardant effect. The heat conductive layer, ventilation holes and ventilation components on the inside can continuously cool the high temperature resistant layer on the outside to prevent it from reaching the ignition point and preventing it from naturally burning. At the same time, the high temperature can be blocked to a certain extent through the ventilation holes and ventilation components on the inside to prevent the high temperature from affecting the cable core unit on the inside. At the same time, the heat insulation flame retardant layer, fireproof layer and other structures arranged on the inside can further enhance its high temperature resistance. When working, the cable can maintain normal operation in a specific high temperature environment and has super high temperature resistance and fireproof performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a cross-sectional view of a special cable for aviation equipment of the present invention;

[0019] Figure 2It is a cross-sectional view of a protruding cable core monomer in a special cable for aviation equipment of the present invention;

[0020] Figure 3 It is a cross-sectional view of a protruding annular channel in a special cable for aviation equipment of the present invention;

[0021] Figure 4 It is a cross-sectional view of a protruding annular groove in a special cable for aviation equipment of the present invention;

[0022] Figure 5 This is a schematic diagram of a protruding ventilation component in a special cable for aviation equipment of the present invention;

[0023] Figure 6 A schematic diagram of a protruding windshield component in a special cable for aviation equipment.

[0024] Markings in the accompanying drawings:

[0025] 100, cable core unit; 110, conductor; 120, insulation layer; 130, inner sheath; 140, inner shielding layer; 150, fireproof layer; 200, outer sheath; 300, flame retardant filling layer; 400, outer shielding layer; 500, heat insulation and flame retardant layer; 600, heat conductive layer; 610, ventilation hole; 620, annular channel; 700, high temperature resistant layer; 710, annular groove; 720, connecting hole; 800, ventilation assembly; 810, first ventilation semi-ring; 820, second ventilation semi-ring; 830, ventilation cavity; 840, air guide duct; 850, air inlet duct; 900, wind shield assembly; 910, wind shield ring; 920, wind shield column. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Example

[0027] The present invention provides a special cable for aviation equipment, see Figure 1-Figure 6, including several groups of cable core units 100, the outer side of the cable core unit 100 is wrapped with an outer sheath 200, and a flame retardant filling layer 300 is arranged between the outer sheath 200 and the cable core unit 100; the outer side of the inner sheath 130 is provided with an outer shielding layer 400, and the outer side of the outer shielding layer 400 is provided with a heat insulation flame retardant layer 500; the outer side of the heat insulation flame retardant layer 500 is formed with a heat conductive layer 600, and the outer side of the heat conductive layer 600 is formed with a high temperature resistant layer 700; a plurality of ventilation holes 610 are arranged at equal angles in the heat conductive layer 600, and both ends of the ventilation holes 610 pass through the cable ends, and the outer side of the cable is provided with a ventilation assembly 800 connected to the ventilation holes 610. When the cable is in a high temperature environment during operation, the low temperature inert gas can be introduced into the ventilation holes 610 through the ventilation assemblies 800 at both ends, and the outer high temperature resistant layer 700 can be cooled and insulated in the heat conductive layer 600, and the heat inside can be taken out to ensure that the inner side of the cable maintains a constant temperature.

[0028] The cable core unit 100 includes a conductor 110, an insulating layer 120 is wrapped around the outside of the conductor 110, an inner sheath 130 is arranged outside the insulating layer 120, an inner shielding layer 140 is arranged outside the inner sheath 130, and a fireproof layer 150 is arranged outside the inner shielding layer 140. By arranging the fireproof layer 150 on the outer ear of the conductor 110, the inner side can further play a heat insulation and flame retardant effect, ensuring the normal operation of the inner conductor 110.

[0029] The heat conducting layer 600 is provided with a plurality of annular channels 620 at intervals along the length direction of the cable, and the annular channels 620 are connected to the ventilation holes 610. The annular channels 620 can be connected to the ventilation holes 610 to ensure the air pressure and temperature balance in the ventilation holes 610.

[0030] The high temperature resistant layer 700 is provided with annular grooves 710 at set intervals along the length direction of the cable, and a plurality of connecting holes 720 are formed at the bottom of the annular grooves 710 , each of which is connected to a ventilation hole 610 .

[0031] The ventilation assembly 800 includes a first ventilation semi-ring 810 and a second ventilation semi-ring 820 in a semicircular shape, the first ventilation semi-ring 810 and the second ventilation semi-ring 820 are embedded in the annular groove 710 and connected to each other; a ventilation cavity 830 is formed inside the first ventilation semi-ring 810 and the second ventilation semi-ring 820, and an air guide 840 is arranged inside the first ventilation semi-ring 810 and the second ventilation semi-ring 820 at intervals, the air guide 840 is connected to the ventilation cavity 830, and the other end is inserted into the connecting hole 720 and is sealed and connected to the connecting hole 720; an air inlet duct 850 is arranged outside the first ventilation semi-ring 810 and the second ventilation semi-ring 820. Through the annular groove 710, the air inlet end is connected to each ventilation hole 610 through the annular groove 710, and when air is inlet, each ventilation hole 610 is coordinated to avoid excessive air pressure in the ventilation hole 610 due to blockage of individual ventilation holes 610, thereby ensuring relative balance of air pressure in each ventilation hole 610. At the same time, it has a cooling and heat preservation effect on the inner side of the cable.

[0032] Windshield components 900 are detachably connected at both ends of the cable. Windshield components 900 include windshield rings 910, the inner diameter of which is larger than the inner diameter of the heat-insulating flame-retardant layer 500 and smaller than the inner diameter of the heat-conducting layer 600; a plurality of windshield columns 920 are integrally formed on one side of the windshield ring 910 close to the cable, and the windshield columns 920 are plugged into the ventilation holes 610 and sealed with the ventilation holes 610. The windshield ring 910 can be connected to the cable by interference fit, bolt fixation or other fixing methods, which are not limited here.

[0033] The cable core units 100 are provided in three groups, and a reinforcing core is provided in the middle of the three groups of cable core units 100. The outer shielding layer 400 and / or the inner shielding layer 140 are quartz wire fireproof shielding layers. The inner sheath 130 and the outer sheath 200 are made of halogen-free flame retardant materials. The flame retardant filling layer 300 is made of polyolefin filling.

[0034] The present invention provides a characteristic cable for aviation equipment, which has super high temperature resistance and fireproof performance. The high temperature resistant layer on the outside has a preliminary flame retardant effect. The heat conductive layer, ventilation holes and ventilation components on the inside can continuously cool the high temperature resistant layer on the outside to prevent it from reaching the ignition point and preventing it from naturally burning. At the same time, the high temperature can be blocked to a certain extent through the ventilation holes and ventilation components on the inside to prevent the high temperature from affecting the cable core unit on the inside. At the same time, the heat insulation flame retardant layer, fireproof layer and other structures arranged on the inside can further enhance its high temperature resistance. When working, the cable can maintain normal operation in a specific high temperature environment and has super high temperature resistance and fireproof performance.

[0035] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", "front", "back" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0036] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection, a mechanical connection, an electrical connection, a direct connection, or an indirect connection through an intermediate medium, or the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. In the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0037] The above-mentioned embodiments only express the implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be based on the attached claims.

Claims

1. A special cable for aviation equipment, characterized in that : comprising a plurality of groups of cable core units (100), wherein the outer sides of the cable core units (100) are wrapped with outer sheaths (200), and a flame retardant filling layer (300) is provided between the outer sheaths (200) and the cable core units (100); An outer shielding layer (400) is provided on the outer side of the outer sheath (200), and a heat-insulating flame-retardant layer (500) is provided on the outer side of the outer shielding layer (400); A heat-conducting layer (600) is formed on the outside of the heat-insulating and flame-retardant layer (500), and a high-temperature-resistant layer (700) is formed on the outside of the heat-conducting layer (600); A plurality of ventilation holes (610) are arranged at equal angles in the heat conductive layer (600); both ends of the ventilation holes (610) penetrate the ends of the cable; and a ventilation assembly (800) connected to the ventilation holes (610) is arranged on the outside of the cable; and both ends of the cable are detachably connected to wind shield assemblies (900); The high temperature resistant layer (700) is provided with annular grooves (710) at a set distance along the length direction of the cable, and a plurality of connection holes (720) are formed at the bottom of the annular groove (710), each of the connection holes (720) being connected to one of the ventilation holes (610); The ventilation assembly (800) comprises a first ventilation half ring (810) and a second ventilation half ring (820) in a semicircular shape, wherein the first ventilation half ring (810) and the second ventilation half ring (820) are embedded in the annular groove (710) and are connected to each other; A ventilation cavity (830) is formed inside the first ventilation half ring (810) and the second ventilation half ring (820); an air guide duct (840) is arranged inside the first ventilation half ring (810) and the second ventilation half ring (820); the air guide duct (840) is connected to the ventilation cavity (830), and the other end of the air guide duct is inserted into the connection hole (720) and is sealed and connected to the connection hole (720); Air inlet pipes (850) are provided on the outer sides of the first ventilation semi-ring (810) and the second ventilation semi-ring (820).

2. A special cable for aviation equipment according to claim 1, characterized in that The cable core unit (100) comprises a conductor (110), the outer side of the conductor (110) is wrapped with an insulating layer (120), the outer side of the insulating layer (120) is provided with an inner sheath (130), the outer side of the inner sheath (130) is provided with an inner shielding layer (140), and the outer side of the inner shielding layer (140) is provided with a fireproof layer (150).

3. A special cable for aviation equipment according to claim 1, characterized in that The heat-conducting layer (600) is provided with a plurality of annular channels (620) at intervals along the length direction of the cable, and the annular channels (620) are connected to the ventilation holes (610).

4. A special cable for aviation equipment according to claim 1, characterized in that : The windshield assembly (900) comprises a windshield ring (910), the inner diameter of the windshield ring (910) being larger than the inner diameter of the heat-insulating flame-retardant layer (500) and smaller than the inner diameter of the heat-conducting layer (600); A plurality of wind shielding columns (920) are integrally formed on one side of the wind shielding ring (910) close to the cable; the wind shielding columns (920) are inserted into the ventilation holes (610) and are sealed and connected to the ventilation holes (610).

5. A special cable for aviation equipment according to claim 1, characterized in that The cable core units (100) are arranged in three groups, and a reinforcing core is arranged between the three groups of the cable core units (100).

6. A special cable for aviation equipment according to claim 2, characterized in that The outer shielding layer (400) and / or the inner shielding layer (140) are quartz wire fireproof shielding layers.

7. A special cable for aviation equipment according to claim 2, characterized in that The inner sheath (130) and the outer sheath (200) are made of halogen-free flame-retardant material.

8. A special cable for aviation equipment according to claim 1, characterized in that The flame retardant filling layer (300) is made of polyolefin filling.

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