Flame-retardant explosion-proof cable

Abstract

The utility model provides a flame-retardant explosion-proof cable, which relates to the technical field of cables and comprises an insulating sleeve, a reinforcing core is arranged inside the insulating sleeve, copper conductors are arranged outside the reinforcing core, a plurality of copper conductors are distributed inside the insulating sleeve in an annular array manner, and a filling layer is arranged among the reinforcing core, the copper conductors and the insulating sleeve. The shielding layer fixedly sleeves the outside of the insulating sleeve, fire spreading can be effectively prevented through cooperation of the first flame-retardant layer and the second flame-retardant layer in the flame-retardant mechanism, the fire risk is reduced, the cable is endowed with good anti-explosion performance through cooperation of the reinforcing core, the shielding layer, the armor layer and the like, internal pressure and external impact can be borne, explosion is prevented, and the cable has good anti-explosion performance. The V-shaped compression-resistant strips and the connecting strips improve the impact resistance and ensure that the structure is stable under external force, the metal woven mesh shielding layer effectively shields electromagnetic interference, guarantees the signal transmission quality and prevents an internal electromagnetic field from interfering with the outside, and the reinforcing core and the armor layer improve the mechanical strength, so that the cable can bear various external forces, is not easy to damage and prolongs the service life.

Description

TECHNICAL FIELD

[0001] The utility model relates to cable technical field especially relates to a flame -retardant formula explosion -proof cable. BACKGROUND

[0002] The explosion -proof cable is a kind of common cable, with the characteristics of low capacitance, low inductance, due to the adoption of reinforced shielding layer, it has excellent shielding performance, so the ability of resisting external electromagnetic field interference, resisting radio frequency interference and resisting electric field coupling is stronger, generally used in the transmission line of explosive environment such as chemical industry and petroleum.

[0003] The existing cable in the process of use once overheat and short circuit condition, since its material is mostly polyethylene, polyvinyl chloride etc. Combustible material, these materials show poor in flame -retardant performance and explosion -proof performance, under the condition of overheat and short circuit, cable is easy to produce high temperature, and combustible material is extremely easy to burn under the action of high temperature, thereby increase the risk of fire explosion accident, once fire explosion accident occurs, not only can cause serious harm to surrounding facilities and personnel, also can cause chain reaction, lead to greater damage.

[0004] Secondly, when cable is impacted or hit by external force, conductor fracture and bulge problem easily appear, conductor fracture can lead to the conductivity of cable to decline or even completely lose, influence power transmission and the normal operation of equipment, and bulge can damage the insulating layer of cable, increase the risk of electric leakage and short circuit, further endanger the safety of equipment and personnel. CONTENT OF THE UTILITY MODEL

[0005] The utility model aims at solving the shortcomings in the prior art, the current cable is easy to produce fire explosion accident under the condition of overheat and short circuit, and conductor fracture and bulge easily appear when being impacted by external force, influence the normal operation of power equipment.

[0006] In order to realize the above-mentioned purpose, the utility model adopts the following technical scheme:

[0007] A kind of flame -retardant formula explosion -proof cable, including insulating sleeve, the inside of the insulating sleeve is provided with reinforcing core, the outside of the reinforcing core is provided with copper conductor, multiple copper conductor is annular array distribution in the inside of the insulating sleeve, filling layer is arranged between the reinforcing core and copper conductor and the insulating sleeve, the outside of the insulating sleeve is fixed with shielding layer, the outside of the shielding layer is provided with flame -retardant mechanism;

[0008] The flame -retardant mechanism includes first flame -retardant layer and second flame -retardant layer, the first flame -retardant layer is fixed with the outside of the shielding layer, V-shaped compression strip that is annular array distribution is arranged between the first flame -retardant layer and second flame -retardant layer, the outside of multiple V-shaped compression strips is fixed with the inside of the second flame -retardant layer.

[0009] Preferably, a connecting strip is arranged between two adjacent V-shaped compression-resistant strips, an armored layer is sleeved on the outer part of the second fireproof layer, and a sheath layer is sleeved on the outer part of the armored layer.

[0010] Preferably, the filling layer is made of fireproof rock wool, and the shielding layer is made of a metal woven mesh.

[0011] Preferably, the first fireproof layer is made of halogen-free fireproof polyolefin, and the second fireproof layer is made of ceramicized silicone rubber.

[0012] Preferably, the armored layer is assembled by spirally winding a steel belt, and the sheath layer is made of polyvinyl chloride.

[0013] Compared with the prior art, the utility model has the advantages that:

[0014] In the utility model, the first fireproof layer and the second fireproof layer in the fireproof mechanism cooperate to effectively prevent fire spreading and reduce fire risk, and the cable is provided with good explosion-proof performance by matching the reinforcing core, the shielding layer and the armored layer, can bear internal pressure and external impact, prevents explosion, the V-shaped compression-resistant strip and the connecting strip improve the impact resistance, ensure the structural stability when subjected to external force, the metal woven mesh shielding layer effectively shields electromagnetic interference, guarantees signal transmission quality and prevents internal electromagnetic field interference from the outside, the reinforcing core and the armored layer improve the mechanical strength, can bear various external forces and are not easy to be damaged, and the service life is prolonged. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 A main structure schematic diagram of the fireproof explosion-proof cable is provided in the utility model;

[0016] Figure 2 An insulating sleeve structure perspective view of the fireproof explosion-proof cable is provided in the utility model;

[0017] Figure 3 A sheath layer structure perspective view of the fireproof explosion-proof cable is provided in the utility model;

[0018] Figure 4 A fireproof explosion-proof cable of the utility model is provided with Figure 3 An enlarged view of structure in A.

[0019] Legend: 1, insulating sleeve; 2, reinforcing core; 3, copper conductor; 4, filling layer; 5, shielding layer; 6, first fireproof layer; 7, second fireproof layer; 8, V-shaped compression-resistant strip; 9, connecting strip; 10, armored layer; 11, sheath layer. DETAILED DESCRIPTION

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0021] To facilitate understanding of this utility model, a more comprehensive description of this utility model will be provided below with reference to relevant embodiments, and several embodiments of this utility model will be given. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of this utility model more thorough and complete.

[0022] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0024] Example

[0025] like Figures 1-4 As shown, this utility model provides a technical solution: a flame-retardant explosion-proof cable, including an insulating sleeve 1. A nano flame-retardant coating can be added inside the insulating sleeve 1 to further improve the flame-retardant performance of the insulating sleeve and reduce the risk of fire. The insulating sleeve 1 is made of high-performance cross-linked polyethylene material and is treated with special processes to improve its insulation performance and aging resistance. The insulating sleeve 1 has a uniform thickness, a smooth surface, and is free of defects such as bubbles and cracks, ensuring that the electrical performance of the cable is stable and reliable.

[0026] The insulating sleeve 1 has a reinforcing core 2 inside. The reinforcing core 2 is made of high-strength glass fiber composite material, which has excellent tensile strength and corrosion resistance. The surface is specially treated to increase the adhesion between the insulating sleeve 1 and the copper conductor 3 and improve the overall mechanical strength of the cable.

[0027] The outer part of the reinforcing core 2 is provided with copper conductors 3, and the copper conductors 3 are arranged in a ring array inside the insulating sleeve 1. The copper conductors 3 are made of high-purity electrolytic copper material and are made through a special wire drawing process to ensure good conductivity of the conductors. A layer of antioxidant is coated on the surface of the copper conductors 3 to prevent oxidation of the copper conductors 3 during use and affect the conductivity.

[0028] The reinforcing core 2 and the copper conductors 3 are provided with a filling layer 4 between the insulating sleeve 1. The outer part of the insulating sleeve 1 is fixedly sleeved with a shielding layer 5, and the outer part of the shielding layer 5 is provided with a flame-retardant mechanism.

[0029] The flame-retardant mechanism includes a first flame-retardant layer 6 and a second flame-retardant layer 7. The first flame-retardant layer 6 is fixedly sleeved with the outer part of the shielding layer 5. V-shaped compression-resistant strips 8 arranged in a ring array are arranged between the first flame-retardant layer 6 and the second flame-retardant layer 7. The V-shaped compression-resistant strips 8 are made of high-strength aluminum alloy material and have good compression resistance and corrosion resistance. The V-shaped compression-resistant strips 8 are designed reasonably in shape, can effectively disperse external force, and improve the impact resistance of the cable.

[0030] The outer part of each of the V-shaped compression-resistant strips 8 is fixedly sleeved with the inner part of the second flame-retardant layer 7.

[0031] A connecting strip 9 is arranged between adjacent two V-shaped compression-resistant strips 8. The connecting strip 9 is made of stainless steel material and has good corrosion resistance and mechanical strength. A first flame-retardant filler is filled in the gap between the connecting strip 9 and the first flame-retardant layer 6. The first flame-retardant filler can be magnesium hydroxide flame retardant. The magnesium hydroxide flame retardant has good flame-retardant performance and can decompose to produce water and absorb a large amount of heat when burning, thereby reducing the flame temperature and achieving the purpose of flame retardation.

[0032] A second flame-retardant filler is arranged in the gap between the connecting strip 9 and the second flame-retardant layer 7. The second flame-retardant filler can be an expanded graphite flame retardant. The expanded graphite can rapidly expand when heated to form a dense carbon layer, thereby preventing the transmission of oxygen and heat and achieving the effect of flame retardation.

[0033] The outer part of the second flame-retardant layer 7 is fixedly sleeved with an armored layer 10. A layer of anti-rust paint is coated on the outer part of the armored layer 10 to prevent the armored layer 10 from being corroded during use and improve the service life of the cable.

[0034] The outer part of the armored layer 10 is fixedly sleeved with a sheath layer 11. A layer of rat and termite repellent is added to the inner part of the sheath layer 11 to prevent the cable from being bitten by rats and termites during use and improve the safety of the cable.

[0035] The filling layer 4 is made of flame-retardant rock wool. A certain proportion of expanded graphite flame retardant is added to the filling layer to further improve the flame-retardant performance of the filling layer. The expanded graphite flame retardant can rapidly expand to form a dense carbon layer when a fire occurs, thereby preventing the spread of fire.

[0036] The material of the shielding layer 5 is a metal woven mesh, which is woven by copper wire or aluminum wire, has good shielding performance and conductive performance, and is coated with an insulating paint outside the shielding layer 5 to prevent short circuit between the shielding layer 5 and other layers and improve the safety of the cable.

[0037] The material of the first flame-retardant layer 6 is halogen-free flame-retardant polyolefin, and by adding a certain proportion of flame retardant and smoke suppressant in the first flame-retardant layer 6, the flame-retardant effect of the first flame-retardant layer 6 is improved, and the smoke and toxic gas emission during fire is reduced.

[0038] The material of the second flame-retardant layer 7 is ceramicized silicone rubber, which will be converted into ceramic material to form a hard protective layer to prevent the spread of fire.

[0039] The armor layer 10 is spirally wound and assembled by steel belt, which has good mechanical strength and corrosion resistance.

[0040] The material of the sheath layer 11 is polyvinyl chloride, which has good weather resistance, corrosion resistance and wear resistance.

[0041] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A flame-retardant explosion-proof cable, comprising an insulating sleeve (1), characterized in that: The insulating sleeve (1) is provided with a reinforcing core (2) inside, and a copper conductor (3) is provided outside the reinforcing core (2). Multiple copper conductors (3) are arranged in a ring array inside the insulating sleeve (1). A filling layer (4) is provided between the reinforcing core (2) and the copper conductor (3) and the insulating sleeve (1). A shielding layer (5) is fixedly sleeved on the outside of the insulating sleeve (1). A flame-retardant mechanism is provided on the outside of the shielding layer (5). The flame-retardant mechanism includes a first flame-retardant layer (6) and a second flame-retardant layer (7). The first flame-retardant layer (6) is fixedly sleeved to the outside of the shielding layer (5). A V-shaped pressure-resistant strip (8) arranged in a ring array is provided between the first flame-retardant layer (6) and the second flame-retardant layer (7). The outside of the plurality of V-shaped pressure-resistant strips (8) is fixedly sleeved to the inside of the second flame-retardant layer (7).

2. The flame-retardant explosion-proof cable according to claim 1, characterized in that: A connecting strip (9) is provided between two adjacent V-shaped pressure-resistant strips (8), and an armor layer (10) is fixedly sleeved on the outside of the second flame-retardant layer (7), and a protective sleeve layer (11) is fixedly sleeved on the outside of the armor layer (10).

3. The flame-retardant explosion-proof cable according to claim 1, characterized in that: The filling layer (4) is made of flame-retardant rock wool, and the shielding layer (5) is made of metal woven mesh.

4. The flame-retardant explosion-proof cable according to claim 1, characterized in that: The first flame retardant layer (6) is made of halogen-free flame retardant polyolefin, and the second flame retardant layer (7) is made of ceramicized silicone rubber.

5. A flame-retardant explosion-proof cable according to claim 2, characterized in that: The armor layer (10) is assembled by spiral winding of steel strips, and the sheath layer (11) is made of polyvinyl chloride.

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