Flame-retardant, fireproof and waterproof power cable with high mechanical strength

Abstract

The utility model discloses a high-mechanical-strength flame-retardant fireproof waterproof power cable, and aims to provide a safe and stable high-mechanical-strength flame-retardant fireproof waterproof power cable, which is characterized by comprising a cable which is sequentially provided with a conductor layer, an insulating layer, a fireproof layer, a shielding layer, a waterproof layer and an outer protective layer from inside to outside, the conductor layer is composed of a main conductor and a plurality of auxiliary conductors arranged around the periphery of the main conductor, the main conductor and the auxiliary conductors are independently separated by the fireproof layer, an elastic supporting rod is formed between every two adjacent auxiliary conductors, and a plurality of heat dissipation channels are further formed in the fireproof layer. The cable is suitable for the technical field of cables.

Description

TECHNICAL FIELD

[0001] The utility model relates to a cable's technical field, more specifically, it relates to a high mechanical strength fire -retardant fire -retardant waterproof power cable. BACKGROUND

[0002] With the rapid development of modern society, as an indispensable energy, power is more and more widely used in industrial production, infrastructure construction, residential areas and other fields. As the key carrier of power transmission, the performance of power cable is directly related to the reliability and safety of power supply. Due to the limitations of design and material, traditional power cable has many shortcomings, for example: when laid underground, the cable needs to bear the weight of the soil and buildings above, and the ordinary cable is easy to be damaged due to long-term stress, causing short circuit or open circuit failure. When exposed to open fire or high temperature, the insulation and sheath material is easy to burn, not only aggravating the fire hazard, but also releasing a large amount of toxic and harmful gases, threatening the safety of personnel. In a humid environment, water will enter the inside of the cable, causing the conductor to corrode, reducing the insulation performance, and causing faults such as leakage and short circuit. It is difficult to meet the strict requirements of mechanical strength, flame retardant, fireproof, waterproof and other aspects in complex environment. SUMMARY

[0003] In view of the shortcomings of the prior art, the purpose of the utility model is to provide a safe and stable high mechanical strength fire -retardant fire -retardant waterproof power cable.

[0004] To achieve the above purpose, the utility model provides the following technical scheme: a high mechanical strength fire -retardant fire -retardant waterproof power cable, comprising a cable, the cable is provided with conductor layer, insulation layer, fireproof layer, shielding layer, waterproof layer and outer sheath layer from inside to outside, the conductor layer is composed of main conductor and a plurality of auxiliary conductors arranged around the main conductor, the fireproof layer separates the main conductor and each auxiliary conductor, and the elastic support rod is formed between the adjacent auxiliary conductors, and a plurality of heat dissipation channels are further arranged in the fireproof layer.

[0005] The utility model is further provided: the reinforcing layer is twisted by a plurality of aramid fiber filaments and a plurality of high-strength steel wire bundles between the insulation layer and the fireproof layer.

[0006] The utility model is further provided: the waterproof layer comprises closely arranged triangular flexible support columns and water blocking powder filled in the gap between the two reinforcing columns, which forms a gel-like substance after encountering water, and can vertically block water penetration.

[0007] The utility model is further provided: the shielding layer adopts an inner and outer double-layer shielding structure, the inner layer adopts an aluminum plastic tape for suppressing low-frequency interference, and the outer layer adopts a copper braid layer for absorbing high-frequency radiation.

[0008] The utility model further sets up: the outer protective layer adopts the composite material containing graphene and is made, the outer protective layer surface is equipped with the recess along the length direction distribution, the recess is inlayed with the silica gel wear -resisting strip of adaptation.

[0009] The utility model further sets up: still be equipped with the armor layer and honeycomb layer in the outer protective layer, the armor layer adopts the double -deck steel band gap and surrounds the package, the honeycomb layer adopts the elastic rubber material.

[0010] The utility model further sets up: the fireproof layer adopts the fire -retardant silicone rubber and is made.

[0011] The utility model has the advantages of:

[0012] 1. The fireproof layer separates the main conductor and each auxiliary conductor, effectively prevents the spread of fire and heat between the conductors, prevents the spread of fire through the conductor in case of fire, greatly reduces the risk of fire expansion. The elastic support rod is formed between the adjacent auxiliary conductors, and when the cable is extruded or stretched externally, the elastic support rod can uniformly disperse stress, effectively reduce the risk of excessive local stress, and greatly improve the extrusion and stretching resistance of the cable. The cable can still maintain a stable physical structure in long-distance underground laying, pipe laying or frequent vibration industrial environment, reduce internal structure damage caused by external force, greatly prolong the service life of the cable. The fireproof layer is provided with a plurality of heat dissipation channels, which greatly improves the heat dissipation condition of the cable. In the process of cable operation, the heat generated by the conductor can be quickly dissipated through the heat dissipation channel, avoiding the accumulation of heat and causing the temperature of the cable to be too high, thereby affecting the performance and service life of the cable. This not only helps to improve the current-carrying capacity of the cable, but also reduces the safety risk caused by overheating, ensuring the stable operation of the cable under various working conditions.

[0013] 2. The reinforcing layer is twisted from a plurality of aramid fiber filaments and a plurality of high-strength steel wire bundles. The aramid fiber filaments have ultra-high strength-to-weight ratio, several times higher than that of steel wire, and excellent wear resistance and chemical corrosion resistance. The high-strength steel wire bundle has extremely high tensile strength. The reinforcing layer formed by twisting the two has greatly enhanced the overall tensile strength of the cable. When the cable encounters tension during installation or external pulling force during use, the reinforcing layer can bear the main tensile load, effectively preventing the internal structure from being damaged due to excessive stretching, maintaining the normal performance of the cable, and reducing the risk of failure caused by stretching. The triangular flexible support columns not only play a waterproof role, but also provide additional mechanical support for the cable. The closely arranged support columns form a stable skeletal structure inside the cable, enhancing the cable's resistance to compression and deformation. When the cable is subjected to external pressure, bending or vibration, the support columns can disperse stress and protect the key components such as the insulation layer and conductor inside the cable from damage, ensuring that the cable can still work normally in harsh mechanical environments. The water-blocking powder forms a gel when it comes into contact with water, giving the waterproof layer self-adaptive waterproofing ability. When the cable is damaged locally during installation or use, the water-blocking powder contacts the infiltrating water and quickly forms a gel to seal the damaged area, preventing further water intrusion, thereby extending the service life of the cable and reducing maintenance costs.

[0014] 3. The double-layer shielding structure has strong anti-interference ability. The inner aluminum-plastic tape can efficiently suppress low-frequency interference and effectively block low-frequency signal intrusion, ensuring stable operation of the equipment in complex electromagnetic environments. The outer copper braid layer exhibits excellent absorption capacity for high-frequency radiation, further enhancing the shielding effect and protecting the equipment from high-frequency radiation, ensuring the accuracy and stability of data transmission and greatly reducing the risk of signal loss or error. The outer protective layer is made of a composite material containing graphene, which has excellent strength and toughness, greatly enhancing the wear resistance, corrosion resistance and aging resistance of the outer protective layer. The grooves distributed along the length direction on the surface of the outer protective layer are embedded with matching silica gel wear-resistant strips. The silica gel has good elasticity and wear resistance. During product use, when the outer protective layer rubs against other objects, the silica gel wear-resistant strip can act as a buffer layer to reduce direct wear of the outer protective layer, while also enhancing the friction between the outer protective layer and the contacting object to prevent the product from slipping during use and improve safety.

[0015] 4. The armor layer inside the outer protective layer is wrapped around by double-layer steel belts with gaps, the steel belts have high strength and rigidity, and can provide reliable mechanical protection for the product, in the face of external extrusion, collision and the like, the armor layer can effectively disperse stress, prevent the internal structure from being damaged, and is especially suitable for use in complex environments or occasions with high mechanical external force. The honeycomb layer is made of elastic rubber material, has excellent buffering and shock-absorbing performance, when the product is subjected to vibration or impact force, the elastic rubber honeycomb layer can absorb energy, reduce vibration transmission to the inside, protect the shielding layer, the line and other key components in the inside, prolong the service life of the product, and improve the reliability thereof. The fireproof layer is made of flame-retardant silicone rubber, the flame-retardant silicone rubber has good flame-retardant properties, and can effectively prevent fire spreading and reduce fire risk when encountering fire and the like. BRIEF DESCRIPTION OF DRAWINGS

[0016] Fig. 1 It is a schematic diagram of the three-dimensional structure of the utility model;

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

[0018] Figs. 1-2 The reference signs are as follows: 1, cable; 2, main conductor; 3, auxiliary conductor; 4, elastic supporting rod; 5, heat dissipation channel; 6, reinforcing layer; 7, insulating layer; 8, fireproof layer; 9, shielding layer; 10, inner layer; 11, outer layer; 12, supporting column; 13, water-blocking powder; 14, groove; 15, silica gel wear-resistant strip; 16, armor layer; 17, honeycomb layer; 18, waterproof layer; 19, outer protective layer. DETAILED DESCRIPTION

[0019] Reference Figs. 1 to 2 The utility model embodiment is further explained.

[0020] In order to facilitate the description, spatial relative terms such as "upper", "lower", "left", "right" and the like are used in the embodiments, for explaining the relationship of one element or feature relative to another element or feature shown in the figure. It should be understood that, in addition to the orientation shown in the figure, the spatial terms are intended to include different orientations of the device in use or operation. For example, if the device in the figure is inverted, the element described as being "below" other elements or features will be positioned "above" the other elements or features. Therefore, the exemplary term "below" can include both upward and downward orientations. The device can be positioned in other ways (rotated 90 degrees or positioned in other orientations), and the spatial relative description used herein can be interpreted accordingly.

[0021] Moreover, relational terms such as "first" and "second" and the like are merely used to distinguish one component from another component with the same name, and do not necessarily require or imply any such actual relationship or order between the components.

[0022] Figs. 1 to 2 The application discloses a high-mechanical-strength fire-retardant waterproof power cable, which comprises a cable 1, wherein the cable 1 is sequentially provided with a conductor layer, an insulation layer 7, a fireproof layer 8, a shielding layer 9, a waterproof layer 18 and an outer protective layer 19 from inside to outside; the conductor layer is formed by a main conductor 2 and a plurality of auxiliary conductors 3 arranged around the circumferential side of the main conductor 2; the fireproof layer 8 separately separates the main conductor 2 and the auxiliary conductors 3, effectively prevents the spread of fire and heat among the conductors, prevents the spread of fire through the conductors in case of fire, greatly reduces the risk of fire expansion, and forms elastic support rods 4 between adjacent auxiliary conductors 3; when the cable 1 is externally extruded or stretched, the elastic support rods 4 can uniformly disperse stress, effectively reduce the risk of excessive local stress, greatly improve the extrusion resistance and tensile resistance of the cable 1, enable the cable 1 to maintain a stable physical structure in long-distance underground laying, pipe laying or frequent vibration industrial environment, reduce internal structure damage caused by external force, and greatly prolong the service life of the cable 1. A plurality of heat dissipation channels 5 are further arranged in the fireproof layer 8, which greatly improves the heat dissipation condition of the cable 1; in the operation process of the cable 1, the heat generated by the conductors can be quickly dissipated through the heat dissipation channels 5, so that the temperature of the cable 1 is prevented from being too high due to heat accumulation, and the performance and service life of the cable 1 are further affected, which not only helps to improve the current-carrying capacity of the cable 1, but also reduces the safety risk caused by overheating, and ensures the stable operation of the cable 1 under various working conditions.

[0023] A reinforcing layer 6 is further arranged between the insulation layer 7 and the fireproof layer 8, and the reinforcing layer 6 is twisted by a plurality of aramid fiber filaments and a plurality of high-strength steel wire bundles; the aramid fiber filaments have an ultrahigh strength-to-weight ratio, the tensile strength of the aramid fiber filaments is several times higher than that of steel wires, and the aramid fiber filaments have excellent wear resistance and chemical corrosion resistance; the high-strength steel wire bundle has extremely high tensile strength; and the reinforcing layer 6 twisted by the aramid fiber filaments and the high-strength steel wire bundle greatly enhances the overall tensile strength of the cable 1. When the cable 1 encounters a tensile force in the laying process or bears external pulling force during use, the reinforcing layer 6 can bear the main tensile load, effectively prevents the internal structure of the cable 1 from being damaged due to excessive stretching, maintains the normal performance of the cable 1, and reduces the risk of failure caused by stretching.

[0024] The waterproof layer 18 includes closely arranged triangular flexible support columns 12 and water-blocking powder 13 filled in the gap between two reinforcing columns. The triangular flexible support columns 12 not only play a waterproof role, but also provide additional mechanical support for the cable 1. The closely arranged support columns 12 form a stable framework structure inside the cable 1, enhancing the compression resistance and deformation resistance of the cable 1. When the cable 1 is subjected to external compression, bending or vibration, the support columns 12 can disperse stress and protect the key components such as the insulating layer 7 and the conductor inside the cable 1 from damage, ensuring that the cable 1 can still work normally in a harsh mechanical environment. The water-blocking powder 13 forms a gel when it comes into contact with water, giving the waterproof layer 18 self-adaptive waterproof ability. When the cable 1 is locally damaged during installation or use, the water-blocking powder 13 contacts with the infiltrated water and quickly forms a gel to seal the damaged part, preventing further water infiltration, thereby prolonging the service life of the cable 1 and reducing maintenance costs.

[0025] The shielding layer 9 adopts an inner and outer double-layer shielding structure, which has strong anti-interference ability. The inner layer 10 adopts an aluminum plastic tape to suppress low-frequency interference, effectively blocking low-frequency signal interference and ensuring stable operation of the equipment in a complex electromagnetic environment. The outer layer 11 adopts a copper braid layer to absorb high-frequency radiation, further improving the shielding effect and protecting the equipment from high-frequency radiation, ensuring the accuracy and stability of data transmission and greatly reducing the risk of signal loss or error.

[0026] The outer protective layer 19 is made of a composite material containing graphene. Graphene has excellent strength and toughness, greatly enhancing the wear resistance, corrosion resistance and aging resistance of the outer protective layer 19. Even in harsh use environments, it can effectively resist external impact, chemical corrosion and the effects of long-term natural environment, significantly extending the service life of the product. The outer protective layer 19 is provided with grooves 14 distributed along the length direction, and the grooves 14 are embedded with matching silica gel wear-resistant strips 15. The silica gel has good elasticity and wear resistance. During product use, when the outer protective layer 19 rubs against other objects, the silica gel wear-resistant strips 15 can act as a buffer layer to reduce direct wear of the outer protective layer 19, while also enhancing the friction between the outer protective layer 19 and the contacting object to prevent the product from slipping during use, improving safety. In addition, this design allows the grooves 14 to provide a certain deformation space when the product is bent or twisted, preventing the outer protective layer 19 from being damaged due to excessive deformation, further improving the durability of the product.

[0027] The outer protective layer 19 is further provided with an armor layer 16 and a honeycomb layer 17. The armor layer 16 is wrapped around by double-layer steel belt gaps. The steel belt has high strength and rigidity, and can provide reliable mechanical protection for the product. In the case of external force extrusion, collision and the like, the armor layer 16 can effectively disperse stress and prevent the internal structure from being damaged. It is especially suitable for use in complex environments or under high mechanical force, such as underground laying, industrial environment, etc. The honeycomb layer 17 is made of elastic rubber material, which has excellent buffering and damping performance. When the product is subjected to vibration or impact force, the elastic rubber honeycomb layer 17 can absorb energy and reduce vibration transmission to the inside, thereby protecting the shielding layer 9, the circuit and other key components inside, prolonging the service life of the product and improving its reliability.

[0028] The fireproof layer 8 is made of flame-retardant silicone rubber. The flame-retardant silicone rubber has good flame-retardant properties and can effectively prevent fire spread and reduce fire risk in the case of fire and high temperature.

[0029] The manufacturing method suitable for the above cable comprises the following steps:

[0030] S1, placing each conductor into a forming machine to perform pouring and extrusion to coat an insulating layer 7;

[0031] S2, after the insulating layer is coated, placing it into a customized mold to perform pouring and extrusion to form a fireproof layer 8, and a support rod is arranged in the fireproof layer;

[0032] S3, after the fireproof layer is formed and cooled, placing it into a customized mold to perform pouring and extrusion to form a waterproof layer 18;

[0033] S4, then wrapping an aluminum plastic tape outside the waterproof layer 18 to form an annular triangular cavity between the waterproof layer and the aluminum plastic tape;

[0034] S5, filling water-blocking powder 13 in the cavity;

[0035] S6, then applying a layer of glue outside the aluminum plastic tape;

[0036] S7, then weaving and fixedly bonding a copper wire outside the aluminum plastic tape;

[0037] S8, then placing it into a forming machine to perform pouring and extrusion to coat an outer protective layer 19, and a groove 14 is formed on the outer protective layer 19 by mold forming;

[0038] S9, finally embedding a silica gel wear-resistant strip 15 in the groove 14.

[0039] The above merely describes preferred embodiments of the present application and is not intended to limit the present application, and any change and replacement within the technical scheme of the present application made by those skilled in the art shall be included in the protection scope of the present application.

Claims

1. A high mechanical strength flame-retardant fire-resistant and waterproof power cable comprising a cable (1), characterized in that, The cable (1) is provided with conductor layer, insulation layer (7), fireproof layer (8), shielding layer (9), waterproof layer (18) and outer protective layer (19) from inside to outside, the conductor layer is provided with main conductor (2) and several auxiliary conductors (3) arranged around the circumferential side of the main conductor (2), the fireproof layer (8) separates the main conductor (2) and each auxiliary conductor (3) separately, and forms elastic support rod (4) between adjacent auxiliary conductors (3), and several heat dissipation channels (5) are further arranged in the fireproof layer (8).

2. A high mechanical strength flame retardant, fire resistant and water resistant power cable as claimed in claim 1, characterized in that, The reinforcing layer (6) is further arranged between the insulation layer (7) and the fireproof layer (8), and the reinforcing layer (6) is twisted by a plurality of aramid fiber filaments and a plurality of high-strength steel wire bundles.

3. A high mechanical strength flame retardant, fire resistant and water resistant power cable as claimed in claim 1, wherein, The waterproof layer (18) includes closely arranged triangular flexible support columns (12) and water blocking powder (13) filled in the gap between two reinforcing columns, which forms gel-like substance after encountering water and can longitudinally block water penetration.

4. A high mechanical strength flame retardant, fire resistant and water resistant power cable as claimed in claim 1, wherein, The shielding layer (9) adopts double-layer shielding structure of inner layer (10) and outer layer (11), the inner layer (10) adopts aluminum plastic tape for suppressing low-frequency interference, and the outer layer (11) adopts copper woven layer for absorbing high-frequency radiation.

5. A high mechanical strength flame retardant, fire resistant and water resistant power cable as claimed in claim 1, wherein, The outer protective layer (19) is made of composite material containing graphene, the outer protective layer (19) is provided with grooves (14) distributed along the length direction on the surface, and the grooves (14) are embedded with matching silica gel wear-resistant strips (15).

6. A fire resistant, flame retardant, water resistant power cable with high mechanical strength according to claim 5, characterized in that, The outer protective layer (19) is further provided with armored layer (16) and honeycomb layer (17), the armored layer (16) is wrapped around by double-layer steel belt gap, and the honeycomb layer (17) is made of elastic rubber material.

7. A high mechanical strength flame retardant, fire resistant and water resistant power cable as claimed in claim 1, wherein, The fireproof layer (8) is made of flame-retardant silicone rubber.

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