Stretch-resistant explosion-proof cable

Abstract

The utility model discloses a stretch-proof explosion-proof cable, which relates to the technical field of cables and comprises a wire core, an insulating layer is coated outside the wire core, a stretch-proof layer is arranged outside the insulating layer, an electromagnetic shielding layer is arranged outside the stretch-proof layer, an explosion-proof layer is arranged outside the electromagnetic shielding layer, and a heat-insulating flame-retardant layer is arranged outside the explosion-proof layer. The outer side of the cable is provided with a heat insulation and flame retardation layer, the outer side of the heat insulation and flame retardation layer is provided with a compression resistance layer, the outer side of the compression resistance layer is provided with an outer protection layer, and the outer surface of the outer protection layer is provided with threaded convex blocks which are uniformly distributed along the cable conveying direction. Therefore, multiple safety requirements in a high-risk environment are met, local stress concentration can be effectively avoided through the stretch-resistant layer made of aramid fibers in a spiral interweaving and weaving mode, the mechanical strength of the cable is improved, and the stretch-resistant capacity of the cable is enhanced.

Description

TECHNICAL FIELD

[0001] The utility model relates to cable technical field, concretely relates to a kind of anti-stretching explosion-proof cable. BACKGROUND

[0002] Cable is a kind of conductor collection for transmission power, signal or data, it is usually composed of multiple conductors, insulating layer, shielding layer and outer sheath etc., mainly used in various power systems, communication networks, industrial equipment, building electrical and transportation etc., the kind of cable is very much, structure, use and performance are also different.

[0003] The existing explosion-proof cable is mostly used in some explosive environment, for example: mine and power and petrochemical plant etc., the environment of these work sites is more complex, cable is vulnerable to external stretching, friction or extrusion and other mechanical stress during installation, operation and maintenance, leading to cable outer sheath damage, internal conductor fracture or electrical performance decline, therefore, an anti-stretching explosion-proof cable is presented to solve the problems presented in the above. SUMMARY

[0004] To solve the above technical problems, an anti-stretching explosion-proof cable is provided, which solves the problem that the existing explosion-proof cable is mostly used in some explosive environment, for example: mine and power and petrochemical plant etc., the environment of these work sites is more complex, cable is vulnerable to external stretching, friction or extrusion and other mechanical stress during installation, operation and maintenance, leading to cable outer sheath damage, internal conductor fracture or electrical performance decline.

[0005] To achieve the above purpose, the technical scheme adopted by the utility model is as follows:

[0006] An anti-stretching explosion-proof cable, comprising a core, an insulating layer is coated on the outside of the core, an anti-stretching layer is arranged on the outside of the insulating layer, an electromagnetic shielding layer is arranged on the outside of the anti-stretching layer, an explosion-proof layer is arranged on the outside of the electromagnetic shielding layer, a heat-insulating and fire-retardant layer is arranged on the outside of the explosion-proof layer, a pressure-resistant layer is arranged on the outside of the heat-insulating and fire-retardant layer, an outer protective layer is arranged on the outside of the pressure-resistant layer, screw thread-shaped protrusions are uniformly distributed on the outer surface of the outer protective layer along the conveying direction of the cable, and the screw thread-shaped protrusions are integrally formed with the outer protective layer.

[0007] Preferably, the insulating layer is made of cross-linked polyethylene.

[0008] Preferably, the anti-stretching layer is made of aramid fiber and is woven in a spiral staggered manner.

[0009] Preferably, the electromagnetic shielding layer is made of aluminum foil.

[0010] Preferably, the explosion-proof layer is a mesh structure woven by stainless steel wires.

[0011] Preferably, the heat-insulating and flame-retardant layer is made of glass fibers.

[0012] Preferably, the compression-resistant layer is a mesh structure woven by polyester fibers.

[0013] Preferably, the outer protective layer is made of polypropylene.

[0014] The utility model discloses a kind of explosion-proof cables, compared with prior art, has the beneficial effects of:

[0015] The present application provides an explosion-proof cable, by multi-level structure design, the tensile resistance, explosion-proof, electromagnetic shielding, heat-insulating and flame-retardant and compression-resistant functions are integrated in the same cable, to meet the multiple safety requirements in high-risk environment, the thread-like bumps designed on the surface of outer protective layer can enhance the friction and grip of the cable, avoid the cable from sliding during installation or use, improve the stability of the cable, the tensile resistance layer made of aramid fiber by spiral interlacing weaving can effectively avoid local stress concentration, improve the mechanical strength of the cable, enhance the tensile resistance of the cable, the explosion-proof layer made of mesh woven structure of stainless steel wire can effectively disperse the impact force and explosion wave from the outside to each steel wire, so that the local area will not be subjected to excessive stress concentration, which helps to reduce the risk of cable rupture or damage when facing extreme environment. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the utility model;

[0017] Figure 2 It is a sectional view of the utility model.

[0018] Reference signs in the drawings are:

[0019] 1, core; 2, insulation layer; 3, tensile resistance layer; 4, electromagnetic shielding layer; 5, explosion-proof layer; 6, heat-insulating and flame-retardant layer; 7, compression-resistant layer; 8, outer protective layer. DETAILED DESCRIPTION

[0020] The following description is used to disclose the utility model so that those skilled in the art can implement the utility model. The preferred embodiments in the following description are only as examples, and those skilled in the art can think of other obvious variations.

[0021] Reference Figure 1 and Figure 2As shown, a kind of anti-tension explosion-proof cable, including core 1, the outside of core 1 is covered with insulating layer 2, the outside of insulating layer 2 is provided with anti-tension layer 3, the outside of anti-tension layer 3 is provided with electromagnetic shielding layer 4, the outside of electromagnetic shielding layer 4 is provided with explosion-proof layer 5, the outside of explosion-proof layer 5 is provided with heat-insulating and fire-retardant layer 6, the outside of heat-insulating and fire-retardant layer 6 is provided with compression-resistant layer 7, the outside of compression-resistant layer 7 is provided with outer protective layer 8, the outer surface of outer protective layer 8 is provided with thread-like protrusion that is evenly distributed along the direction of cable conveying, and thread-like protrusion is integrally formed with outer protective layer 8.

[0022] Further, insulating layer 2 is made of cross-linked polyethylene, which is a high-performance cable insulation material. After cross-linking treatment, the molecular structure becomes more stable, providing excellent electrical insulation and thermal stability. At the same time, cross-linked polyethylene has high temperature resistance and oxidation resistance. Even in high temperature or long time high voltage working environment, it can still maintain its electrical insulation performance, and is not easy to be electrically broken down under high voltage, providing more reliable electrical isolation and ensuring safe operation of equipment.

[0023] Further, anti-tension layer 3 is made of aramid fiber woven in a spiral staggered manner. Aramid fiber is a high-strength and lightweight synthetic fiber that can provide very high tensile strength and anti-breakage. The spiral woven structure can distribute the tensile force in multiple directions when the cable is subjected to tension, rather than concentrating on a certain point or direction, thereby avoiding local stress concentration and local fiber breakage, and further enhancing the anti-tension ability of the cable.

[0024] Further, electromagnetic shielding layer 4 is made of aluminum foil, which is a common electromagnetic shielding material that can effectively isolate external electromagnetic interference and radio frequency interference. During cable transmission, the aluminum foil shielding layer can prevent the internal signals of the cable from being disturbed by external electromagnetic waves, ensuring the purity and stability of the signals.

[0025] Further, explosion-proof layer 5 is a mesh structure woven by stainless steel wire. Stainless steel wire is a metal material with high tensile strength, corrosion resistance and toughness, which can withstand great tensile stress. The mesh woven structure can effectively disperse the impact force and explosion wave from the outside to each steel wire, so that the local area will not be subjected to excessive stress concentration, which helps to reduce the risk of rupture or damage. At the same time, through the mesh weaving, the stainless steel wire can effectively slow down the propagation speed of external impact wave and pressure, preventing the cable from being pulled apart or torn apart under the action of external impact or explosion wave.

[0026] Further, the heat-insulating and fire-retardant layer 6 is made of glass fiber, which has high heat resistance and good fire-retardant performance, effectively delaying the spread of fire and preventing the internal temperature of the cable from being too high to cause a fire. In a high-temperature environment, it can effectively isolate the heat source and improve the fire resistance of the cable to ensure the safety of the cable in extreme temperatures.

[0027] Further, the compression-resistant layer 7 is a mesh structure woven from polyester fiber, which is a fiber material with good compression resistance and tensile strength. The mesh structure woven from polyester fiber can effectively disperse external pressure and prevent the cable from deforming or being damaged when subjected to external pressure. In transportation, installation, or high-pressure environments, the compression-resistant layer 7 can protect the cable from external mechanical impact and extrusion, increasing the compression strength of the cable.

[0028] Further, the outer protective layer 8 is made of polypropylene, which is a thermoplastic plastic with good mechanical strength, chemical corrosion resistance, and ultraviolet resistance. The outer protective layer 8 made of polypropylene provides strong physical protection against mechanical impact and chemical erosion, extending the service life of the cable. The high corrosion resistance and ultraviolet resistance of polypropylene enable the cable to work stably outdoors or in extreme environments, with outstanding anti-aging performance. The design of the screw-shaped bumps evenly distributed on the surface of the outer protective layer 8 along the cable conveying direction can enhance the friction of the cable in specific environments, effectively improving the grip of the cable and preventing it from sliding during installation or operation. It also helps reduce friction and wear during cable laying, improving the stability of the cable in dynamic environments. The screw-shaped arrangement can also disperse the tension when subjected to external tension, preventing the cable from breaking due to local stress concentration.

[0029] Further, the primary function of the heat-insulating and fire-retardant layer 6 is to prevent the spread of fire in the event of a fire. In the event of a fire, the cable may be ignited by the fire source, exposing the core 1 and causing electrical failure, which can worsen the fire. The heat-insulating and fire-retardant layer 6 can hinder the fire source and prevent the core 1 from being exposed, thereby reducing the likelihood of fire spread. The heat-insulating and fire-retardant layer 6 is located inside the compression-resistant layer 7 and the outer protective layer 8, ensuring that it will not be worn by external factors under normal circumstances, thereby ensuring that it can function stably in the event of a fire.

[0030] Working principle: when in use, the core 1 is responsible for the transmission of current, the insulating layer 2 provides the electrical insulation function, prevents current leakage or electric shock, the electromagnetic shielding layer 4 effectively isolates external electromagnetic interference and radio frequency interference, the anti-pressure layer 7 can disperse the external compression force of the cable in use, prevents the cable from deforming or damaging when being pressed, ensures the stable transmission of the signal inside the cable, the anti-stretching layer 3 can avoid the concentration of tension in a certain point when the cable is stretched, thereby reducing the risk of fracture caused by local stress concentration, when the cable encounters explosion or severe impact, the explosion-proof layer 5 can effectively disperse the external explosion wave and impact force through the mesh structure, prevents the cable from breaking due to excessive local pressure, when the cable works in a high temperature environment, the heat-resistant and flame-retardant layer 6 can protect the inside of the cable from being affected by excessive temperature, the outer protective layer 8 made of polypropylene can provide strong physical protection against external mechanical impact and chemical substance erosion, prolong the service life of the cable, at the same time, the threaded bumps on the surface not only can enhance the friction of the outer protective layer 8, prevent the cable from sliding during installation, but also can disperse the external applied tension, avoid the cable from breaking due to the concentration of tension.

[0031] The basic principle, main characteristics and advantages of the utility model are shown and described above. The skilled in the art should understand that the utility model is not limited by the above examples, the above examples and the description in the specification are only the principles of the utility model, various changes and improvements of the utility model can be made without departing from the spirit and scope of the utility model, and these changes and improvements all fall within the scope of the utility model claimed. The protection scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A stretch-resistant, explosion-proof cable, characterized in that, The utility model relates to a cable, which comprises a core (1), the outer side of the core (1) is covered with an insulation layer (2), the outer side of the insulation layer (2) is provided with a tensile resistance layer (3), the outer side of the tensile resistance layer (3) is provided with an electromagnetic shielding layer (4), the outer side of the electromagnetic shielding layer (4) is provided with an explosion-proof layer (5), the outer side of the explosion-proof layer (5) is provided with a heat insulation and flame retardant layer (6), the outer side of the heat insulation and flame retardant layer (6) is provided with a pressure resistance layer (7), the outer side of the pressure resistance layer (7) is provided with an outer protective layer (8), and the outer surface of the outer protective layer (8) is provided with screw thread-shaped protrusions that are uniformly distributed along the cable conveying direction, and the screw thread-shaped protrusions are integrally formed with the outer protective layer (8).

2. A stretch-resistant explosion-proof cable according to claim 1, characterized in that: The insulation layer (2) is made of cross-linked polyethylene.

3. A stretch-resistant explosion-proof cable according to claim 1, characterized in that: The tensile resistance layer (3) is made of aramid fiber and is woven in a spiral staggered manner.

4. A stretch-resistant explosion-proof cable according to claim 1, characterized in that: The electromagnetic shielding layer (4) is made of aluminum foil.

5. A stretch-resistant explosion-proof cable according to claim 1, characterized in that: The explosion-proof layer (5) is a mesh structure woven by stainless steel wire.

6. A stretch-resistant explosion-proof cable according to claim 1, characterized in that: The heat insulation and flame retardant layer (6) is made of glass fiber.

7. A stretch-resistant explosion-proof cable according to claim 1, characterized in that: The pressure resistance layer (7) is a mesh structure woven by polyester fiber.

8. A stretch-resistant explosion-proof cable according to claim 1, characterized in that: The outer protective layer (8) is made of polypropylene.

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