High-strength low-smoke halogen-free flexible cable

Abstract

The utility model relates to the technical field of cables, and discloses a high-strength low-smoke halogen-free flexible cable, which comprises a cable outer insulation sleeve, a plurality of cable core protection sleeves are arranged in the cable outer insulation sleeve, and outer fillers are arranged between the cable outer insulation sleeve and the cable core protection sleeves. The cable cores are arranged in the multiple cable core protection sleeves, the cable cores are arranged in the cable core protection sleeves in a twisted and wound mode, the elastic pieces are arranged in the outer filler, the multiple composite sheath layers are arranged in the middle layer in the cable outer insulation sleeve, and the multiple composite sheath layers are arranged in the middle layer in the cable outer insulation sleeve. The inner layer of the multi-layer composite sheath layer is made of a silicone rubber material, and the outer layer of the multi-layer composite sheath layer is made of a wear-resistant material TPU. According to the utility model, the reliability and long service life of the cable in dynamic and complex environments are ensured, and the problems that the mechanical strength and flexibility of the cable are poor, the requirements of high tensile strength and high flexibility are difficult to meet, and the cable is easy to break or damage are solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to cable technical field especially relates to a high strength low smoke halogen -free flexible cable. BACKGROUND

[0002] Low smoke halogen -free cable is a kind of environmental protection type cable, and the smoke generated when burning is very little and does not release toxic gas containing halogen, has good flame retardant performance and environmental protection characteristics, is widely used in high safety requirement's occasion, such as high -rise building, subway, data center etc.The necessity of using high strength low smoke halogen -free flexible cable lies in, it not only satisfies the safety and environmental protection requirement of low smoke halogen -free, simultaneously through high -strength material design and softness structure, has excellent tensile strength, wear resistance and flexibility, makes it suitable for dynamic motion environment, complex wiring and high reliability demand's industrial application scene, so as to give consideration to safety, service life and applicability.

[0003] Traditional low smoke halogen -free cable is mainly applied to the place needing strict control fire hazard and environmental protection requirement, for example high -rise building, subway, airport, hospital, data center and other personnel -dense public place.It is through the outer sheath and insulation layer of low smoke halogen -free material, significantly reduces the generation of smoke and toxic gas in fire, is helpful to personnel safety evacuation and reduces environmental hazards.Traditional low smoke halogen -free cable is usually used for power transmission, lighting circuit, signal control etc.Fixed installation scene, and its hardness is higher, is suitable for more stable wiring environment, but the flexibility and tensile property are lower, limit the use in dynamic scene or complex installation environment.

[0004] Traditional low smoke halogen -free cable, due to its material characteristics and structural design's limitation, usually adopts low smoke halogen -free polyolefin as insulation and sheath material, has flame retardant and environmental protection performance, but the mechanical strength and flexibility of itself are poor, difficult to meet the requirements of high tensile strength and high flexibility, is prone to fracture or damage. UTILITY MODEL CONTENTS

[0005] In order to make up for the above insufficient, the utility model provides a kind of high strength low smoke halogen -free flexible cable, to improve the mechanical strength and flexibility of traditional low smoke halogen -free cable, difficult to meet the requirements of high tensile strength and high flexibility, prone to fracture or damage problem.

[0006] To achieve the above object, the utility model provides the following technical scheme: A kind of high-strength low-smoke halogen-free flexible cable, the inside of the cable outer insulation sleeve is provided with multiple cable core protective sheaths, the outside of the cable outer insulation sleeve and cable core protective sheath is provided with outer filling, the inside of multiple cable core protective sheaths is provided with cable core, the cable core is in twisted winding and is arranged in the inside of cable core protective sheath, the inside of the outer filling is provided with elastic member, the inside of the cable outer insulation sleeve is provided with multiple composite sheath layers in middle layer, the inner layer of the multiple composite sheath layers is made of silicone rubber material, the outer layer of the multiple composite sheath layers is made of wear-resistant material TPU, the inside of the cable core protective sheath is provided with reinforcing layer in middle layer.

[0007] Further, the inside of the cable outer insulation sleeve is provided with flame-retardant layer, the inside of the cable outer insulation sleeve is provided with high molecular composite layer in inner layer, the high molecular composite layer is attached with outer filling, the inside of the cable core protective sheath is provided with protective layer in outer layer, the inside of the cable core protective sheath is provided with inner lubricating layer in inner layer, the cable core protective sheath is provided with inner filling between cable core, and the inner lubricating layer is attached with inner filling.

[0008] Further, the flame-retardant layer is made of low-smoke halogen-free flame-retardant polyethylene material, and is used for flame-retardant to the cable outer insulation sleeve.

[0009] Further, the outer filling is made of cotton fiber, and is used for providing high tensile strength while maintaining flexibility.

[0010] Further, the protective layer is made of polyurethane material, and is used for providing wear-resistant and tear-resistant properties to the cable core protective sheath.

[0011] Further, the reinforcing layer is made of glass fiber material, and is used for further enhancing tensile strength.

[0012] Further, the outer wall of the inner lubricating layer is uniformly coated with silicon-based lubricating coating, and is used for reducing the friction of the cable core.

[0013] Further, the inner filling is made of low-density foamed polyethylene, and is used for increasing the internal buffering of the cable core.

[0014] The utility model has the following beneficial effects:

[0015] 1、In the utility model, through the outer filling of cotton fiber and the multiple composite sheath layer of silicone rubber inner layer, excellent tensile strength and softness are realized;The twisted winding cable core is combined with the low-density foamed polyethylene inner filling, to ensure the reliability and long life of the cable in dynamic and complex environment, solve the problem that cable mechanical strength and flexibility are poor, difficult to meet the requirements of high tensile strength and high flexibility, prone to breakage or damage.

[0016] 2、The abrasion-resistant TPU layer of the outer sheath and the polyurethane layer of the protective sheath provide excellent wear resistance, the glass fiber reinforcing layer enhances the tensile strength; the inner lubricating layer of the silicon-based lubricating coating effectively reduces friction, reduces wear and tear, and prolongs the service life. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 A three-dimensional structure schematic diagram of a high-strength low-smoke halogen-free flexible cable is provided for the utility model;

[0018] Figure 2 A cable outer insulation sleeve internal structure schematic diagram of a high-strength low-smoke halogen-free flexible cable is provided for the utility model;

[0019] Figure 3 A cable outer insulation sleeve structure schematic diagram of a high-strength low-smoke halogen-free flexible cable is provided for the utility model;

[0020] Figure 4 A cable core protective sheath internal structure schematic diagram of a high-strength low-smoke halogen-free flexible cable is provided for the utility model.

[0021] LEGEND:

[0022] 1, cable outer insulation sleeve; 101, flame-retardant layer; 102, multi-layer composite sheath layer; 103, high molecular composite layer; 2, outer filling; 3, cable core protective sheath; 301, protective layer; 302, reinforcing layer; 303, inner lubricating layer; 4, cable core; 5, inner filling; 6, elastic piece. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0024] REFERENCE Figure 1 - Figure 4The utility model provides a kind of embodiment: a kind of high-strength low smoke halogen-free soft cable, the inside of cable outer insulation sleeve 1 is provided with multiple cable core protective sheath 3, for providing tensile strength and buffering function, cable outer insulation sleeve 1 with the outside filling 2 between cable core protective sheath 3 is provided, the inside of multiple cable core protective sheath 3 is provided with cable core 4, cable core 4 is stranded and is wound and is arranged in the inside of cable core protective sheath 3, cable core 4 is stranded and is wound and is arranged to increase flexibility and fatigue resistance, the inside of outside filling 2 is provided with elastic member 6, further improve buffering effect and dynamic adaptability, the inside of cable outer insulation sleeve 1 middle layer is provided with multilayer composite sheath layer 102, the inner layer of multilayer composite sheath layer 102 is made of silicone rubber material, multilayer composite sheath layer 102 is used to enhance softness, outer layer is made of wear -resisting material TPU, for improving wear resistance and service life, the outer layer of multilayer composite sheath layer 102 is made of wear -resisting material TPU, the inside of cable core protective sheath 3 middle layer is provided with reinforcing layer 302, further promote tensile property by glass fiber material.

[0025] Refer to Figure 1 - Figure 4 The inside of cable outer insulation sleeve 1 outer layer is provided with flame-retardant layer 101, adopts low smoke halogen-free flame-retardant polyethylene material, provides flame-retardant protection, the inside of cable outer insulation sleeve 1 inner layer is provided with high molecular composite layer 103, high molecular composite layer 103 is attached with outside filling 2, high molecular composite layer 103 is attached with outside filling 2, for enhancing adhesion and overall strength, the inside of cable core protective sheath 3 outer layer is provided with protective layer 301, protective layer 301 is made of polyurethane material, provides wear resistance and tear resistance, the inside of cable core protective sheath 3 inner layer is provided with inner lubricating layer 303, the outer wall of inner lubricating layer 303 is uniformly coated with silicon-based lubricating coating, for reducing the friction between cable core 4 and protective sheath 3, cable core protective sheath 3 with cable core 4 between setting has inside filling 5, inside filling 5 is made of low-density foamed polyethylene, provides buffering protection and additional softness, inner lubricating layer 303 is attached with inside filling 5, flame-retardant layer 101 is made of low smoke halogen-free flame-retardant polyethylene material, for flame-retardant to cable outer insulation sleeve 1, outside filling 2 is made of cotton fiber, for providing high tensile strength, while keeping flexibility, protective layer 301 is made of polyurethane material, for providing wear resistance, tear resistance properties to cable core protective sheath 3, reinforcing layer 302 is made of glass fiber material, for further strengthening tensile strength, the outer wall of inner lubricating layer 303 is uniformly coated with silicon-based lubricating coating, for reducing the friction of cable core 4, inside filling 5 is made of low-density foamed polyethylene, for increasing the buffering of cable core 4 inside.

[0026] Working principle: when the high strength low smoke halogen-free flexible cable is needed, the outer cable outer insulation sleeve 1 is composed of a plurality of composite sheath layers 102, the inner layer of which is made of silicone rubber material to provide softness, and the outer layer is made of wear-resistant TPU material to enhance wear resistance, the outer layer of the insulation sleeve is provided with a flame-retardant layer 101 made of low-smoke halogen-free flame-retardant polyethylene to provide flame-retardant protection for the cable, the inner layer is provided with a high molecular composite layer 103, which is attached to the outer filler 2, the outer filler 2 is made of cotton fiber and contains elastic element 6, which provides tensile strength and cushioning function, the outer layer of the cable core protective sleeve 3 is provided with a protective layer 301 made of polyurethane to provide wear resistance and tear resistance, the middle layer is provided with a glass fiber reinforced layer 302 to improve the tensile property, and the inner layer is an inner lubricating layer 303 coated with a silicon-based lubricating coating to reduce the friction between the cable core 4 and the protective sleeve, the cable core 4 is in a twisted and wound state, located inside the cable core protective sleeve 3, and the cable core protective sleeve 3 is filled with an inner filler 5 made of low-density foamed polyethylene, which provides cushioning protection and softness for the cable core 4, and ensures its reliability and service life in dynamic and complex environments.

[0027] Finally, it should be pointed out that: the above is only the preferred embodiment of the utility model, and is not used to limit the utility model, although the utility model is described in detail with reference to the foregoing embodiments, for those skilled in the art, it still can modify the technical scheme recorded in the foregoing embodiments, or make equivalent replacement to part of the technical features, any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the utility model should be included in the protection scope of the utility model.

Claims

1. A high strength, low smoke, halogen-free flexible cable comprising a cable outer insulating jacket (1), characterised in that: The cable outer insulation sleeve (1) is internally provided with a plurality of cable core protective sleeves (3), and the cable outer insulation sleeve (1) and the cable core protective sleeve (3) are provided with an outer filling (2), the plurality of cable core protective sleeves (3) are internally provided with cable cores (4), the cable core (4) is arranged in a twisted and wound manner in the cable core protective sleeve (3), the inner part of the outer filling (2) is provided with an elastic member (6), the inner part of the cable outer insulation sleeve (1) is provided with a plurality of composite sheath layers (102), the inner part of the composite sheath layer (102) is made of a silicone rubber material, the outer part of the composite sheath layer (102) is made of a wear-resistant material TPU, and the inner part of the cable core protective sleeve (3) is provided with a reinforcing layer (302).

2. A low smoke, zero halogen flexible cable of high strength according to claim 1, characterized in that: The inner part of the cable outer insulation sleeve (1) is provided with a flame-retardant layer (101), the inner part of the cable outer insulation sleeve (1) is provided with a high polymer composite layer (103), the high polymer composite layer (103) is attached to the outer filling (2), the inner part of the cable core protective sleeve (3) is provided with a protective layer (301), the inner part of the cable core protective sleeve (3) is provided with an inner lubricating layer (303), and the cable core protective sleeve (3) and the cable core (4) are provided with an inner filling (5), and the inner lubricating layer (303) is attached to the inner filling (5).

3. A low smoke, zero halogen flexible cable of high strength according to claim 2, characterized in that: The flame-retardant layer (101) is made of a low-smoke halogen-free flame-retardant polyethylene material, and is used for flame-retardant of the cable outer insulation sleeve (1).

4. A low smoke, zero halogen flexible cable of high strength according to claim 1, characterized in that: The outer filling (2) is made of cotton fiber, which is used for providing high tensile strength while maintaining flexibility.

5. A low smoke, zero halogen flexible cable of high strength according to claim 2, characterized in that: The protective layer (301) is made of a polyurethane material, which is used for providing wear-resistant and tear-resistant properties for the cable core protective sleeve (3).

6. A low smoke, zero halogen flexible cable of high strength according to claim 1, characterized in that: The reinforcing layer (302) is made of a glass fiber material, which is used for further enhancing the tensile strength.

7. A low smoke, zero halogen flexible cable of high strength according to claim 2, characterized in that: The outer wall of the inner lubricating layer (303) is uniformly coated with a silicon-based lubricating coating, which is used for reducing the friction of the cable core (4).

8. A low smoke, zero halogen flexible cable of high strength according to claim 2, characterized in that: The inner filling (5) is made of low-density foamed polyethylene, which is used for increasing the internal buffer of the cable core (4).

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