A radiation type flame-retardant high-temperature-resistant and torsion-resistant shielding flexible cable for wind power generation

Abstract

The utility model discloses a kind of irradiation type flame-retardant high-temperature-resistant torsion-resistant shielding type flexible cable for wind power generation, the cable is from outside to inside in turn sheath, tape layer, metal shielding layer, insulating sleeve, conductor;The outer surface of the sheath is sleeved with function sleeve, and spacing is left between the end surface of the function sleeve and the sheath;Cutting portion is also formed in the position of the sheath near end portion, and cutting trajectory is constituted between the cutting portion and sheath end portion, and the cutting portion is locating groove, and the end section of the locating groove is semicircular;For the problem that cutting length is difficult to accurately control in cable connection construction, the utility model predefines standardization cutting guide groove on the sheath surface, adopts mold forming technology in cable production stage, and continuous guide groove is pressed out on the outer layer of sheath, and groove depth, groove width and pitch are accurately designed according to industry specification, and meanwhile, locating groove can be used as definite cutting positioning reference.

Description

Technical Field

[0001] This utility model belongs to the field of cable technology, specifically relating to an irradiated flame-retardant, high-temperature resistant, torsion-resistant shielded flexible cable for wind power generation. Background Technology

[0002] As a key carrier of modern electrical and information transmission, the background technology of cables can be traced back to the 19th-century electrical revolution. In recent years, with the iteration of communication technology, special products such as optical fiber composite cables (OPGW) and coaxial cables have emerged, integrating power transmission and data communication functions. Meanwhile, explorations in cutting-edge fields such as nanomaterials and superconducting technology are driving the evolution of cables towards lightweight, low-loss, and intelligent designs, continuously empowering the construction of the energy internet and new infrastructure.

[0003] Currently, when connecting cables to external joints, the outer insulation layer must be removed manually to expose the conductor. However, this process suffers from significant deficiencies in standardization: due to the lack of precise quantitative standards, the cutting length relies entirely on the on-site experience of the workers. Differences in skill levels and operating habits among different operators lead to inconsistent cutting lengths. More importantly, specialized industries such as petrochemicals have stringent process requirements for cable connections, such as requiring specific lengths to meet safety standards for sealing, explosion-proofing, or mechanical stress buffering. Experience-based operations are highly susceptible to safety hazards due to length deviations—cutting too short may result in insufficient conductor exposure and poor contact, while cutting too long may damage the insulation layer or affect the stability of the protective structure. Such quality fluctuations caused by human factors not only increase the difficulty of on-site acceptance but may also create long-term operational risks due to hidden defects. Therefore, there is an urgent need to upgrade the operational process through standardized tools or digital measurement technologies. Utility Model Content

[0004] The purpose of this utility model is to provide an irradiated flame-retardant, high-temperature resistant, torsion-resistant shielded flexible cable for wind power generation, in order to solve the problem of non-standard operation in the connection of existing cables mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an irradiated flame-retardant, high-temperature resistant, torsion-resistant shielded flexible cable for wind power generation, wherein the cable consists of a sheath, a wrapping layer, a metal shielding layer, an insulating sleeve, and a conductor, from the outside to the inside. The outer surface of the sheath is fitted with a functional sleeve, and a gap is left between the functional sleeve and the end face of the sheath; A cutting portion is also formed near the end of the sheath, and a cutting trajectory is formed between the cutting portion and the end of the sheath.

[0006] Preferably, the cutting part is a positioning groove, and the end cross-section of the positioning groove is semi-circular; The depth of the positioning groove is half the thickness of the sheath.

[0007] Preferably, the cutting trajectory formed between the positioning groove and the end of the sheath is a guide groove, the depth of which is equal to the depth of the positioning groove. When wiring is required, the area between the positioning groove and the end of the sheath can be removed through the guide groove.

[0008] Preferably, the guide grooves are spirally distributed, and the longitudinal section of the end of the guide groove is semi-circular.

[0009] Preferably, the outer side of the sheath is further fitted with a functional sleeve. A locking groove is formed on the outer wall of the functional sleeve at the end opposite to the positioning groove. During use, a clamp is placed in the locking groove, and the locking groove and the sheath are secured by the clamp. The functional sleeve is designed to protect the position of the positioning groove and the external connector, preventing the conductor from being exposed. As a redundant design, an integrated connecting protrusion is provided at the end of the functional sleeve opposite to the positioning groove. This connecting protrusion connects to the surface of the sheath. During normal use, the functional sleeve is fixed to the sheath by the connecting protrusion. When the functional sleeve is needed, it is simply pulled to break the connecting protrusion before use.

[0010] Preferably, the metal shielding layer is made of tin-plated metal wire braid, which can effectively reduce the interference of electromagnetic fields on the electrical system, improve the electric field distribution, and has corrosion resistance to improve the service life of the cable; the wrapping layer is a low-smoke halogen-free flame-retardant wrapping layer.

[0011] Preferably, the conductor is a composite structure consisting of a copper core, a type 5 conductor, and copper foil wires.

[0012] Compared with the prior art, the beneficial effects of this utility model are: To address the challenge of precisely controlling cutting length during cable connection construction, this invention features a standardized cutting guide groove pre-designed on the sheath surface. During cable production, mold-forming technology is employed to press continuous guide grooves onto the outer layer of the sheath. The groove depth, width, and pitch are precisely designed according to industry standards. Simultaneously, the positioning groove serves as a clear cutting positioning benchmark. Construction personnel only need to perform circumferential cutting along the guide groove's trajectory to precisely control the stripping length, completely eliminating human error caused by experience-based operations and ensuring that each connection point meets the process requirements of petrochemical and other scenarios. Furthermore, the spiral groove design distributes the cutting force to multiple contact points, significantly reducing tool resistance and improving cutting efficiency and surface smoothness. Crucially, the spiral groove only acts on the sheath surface, without damaging the internal support structure, maintaining complete mechanical strength and protective performance even when not cutting, thus ensuring both ease of construction and operational reliability. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram showing the connection between the sheath and the functional sleeve of this utility model; Figure 3 This utility model Figure 2 Rear view; Figure 4 This utility model Figure 3 A magnified diagram of region A.

[0014] In the picture: 101. Sheath; 102. Wrapping tape layer; 103. Metallic shielding layer; 104. Conductor; 105. Insulating sleeve; 106. Guide groove; 107. Positioning groove; 200. Functional sleeve; 201. Locking groove; 202. Connecting protrusion. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] Please see Figures 1 to 4 This utility model provides a technical solution: an irradiated flame-retardant, high-temperature resistant, torsion-resistant shielded flexible cable for wind power generation, wherein the cable consists of a sheath 101, a wrapping layer 102, a metal shielding layer 103, an insulating sleeve 105, and a conductor 104 from the outside to the inside. A functional sleeve 200 is fitted onto the outer surface of the sheath 101, and a gap is left between the functional sleeve 200 and the end face of the sheath 101. A cutting portion is also formed near the end of the sheath 101, and a cutting trajectory is formed between the cutting portion and the end of the sheath 101.

[0017] In this embodiment, preferably, the cutting part is a positioning groove 107, and the end cross-section of the positioning groove 107 is semi-circular; The depth of the positioning groove 107 is half the thickness of the sheath 101.

[0018] In this embodiment, preferably, the cutting trajectory formed between the positioning groove 107 and the end of the sheath 101 is a guide groove 106. The depth of the guide groove 106 is equal to the depth of the positioning groove 107. When wiring is required, the area between the positioning groove 107 and the end of the sheath 101 can be removed through the guide groove 106.

[0019] In this embodiment, preferably, the guide groove 106 is spirally distributed, and the longitudinal section of the end of the guide groove 106 is semi-circular.

[0020] In this embodiment, preferably, a functional sleeve 200 is also provided on the outside of the sheath 101. The outer wall of the functional sleeve 200 opposite to the positioning groove 107 has a locking groove 201. In use, the clamp is placed in the locking groove 201, and the locking groove 201 and the sheath 101 are fastened by locking the clamp. The functional sleeve 200 is designed to protect the position of the positioning groove 107 and the external connector position, preventing the conductor 104 from being exposed. For redundancy, the end of the functional sleeve 200 opposite to the positioning groove 107 is provided with an integral connecting protrusion 202. The connecting protrusion 202 is connected to the surface of the sheath 101. In normal use, the functional sleeve 200 and the sheath 101 are fixed by the connecting protrusion 202. When the functional sleeve 200 is needed, it is pulled directly to break the connecting protrusion 202, and then it can be used.

[0021] In this embodiment, preferably, the insulating sleeve 105 is made of 105℃ ethylene propylene rubber high-elasticity irradiated insulating material, which has excellent properties such as high elasticity, high temperature resistance, aging resistance, and oil resistance. The raw material formula of the insulating sleeve 105 by weight is as follows: 100 parts EPDM raw rubber; basic materials provide basic properties. Calcined kaolin agent (80 parts) improves extrusion surface, increases tear strength, and enhances tear resistance. 20 parts talc powder (to improve processing performance); 15 parts paraffin oil (to increase heat resistance); 2.5 parts peroxydiisopropyltriene irradiated crosslinking extrusion; 2 parts triallyl isocyanurate co-crosslinking agent; Thiobenzimidazole 2.5 antioxidant; Five parts zinc oxide protect the cross-linked network and improve heat resistance; 1.5 parts of polyethylene wax improve demolding properties and extrusion surface smoothness. The metal shielding layer 103 is made of tin-plated metal wire braid, which can effectively reduce electromagnetic interference to the electrical system, improve electric field distribution, and has corrosion resistance to improve cable service life. The wrapping layer 102 is a low-smoke halogen-free flame-retardant wrapping tape, which has excellent flame retardant, low smoke, halogen-free and high temperature resistance properties. The raw material formula of sheath 101 by weight is as follows: 100 parts of matrix resin; basic materials provide basic properties. 40 parts of trimellitic acid esters as plasticizer; 30 parts modified resin (to improve cold resistance); 15 parts antimony trioxide (to increase heat resistance and reduce smoke density); 30 parts of magnesium hydroxide improve heat resistance and reduce smoke density; 10 parts copolymer resin temperature agent; Five parts of fluororubber improve oil impregnation properties; Adding 10 parts of calcined kaolin agent improves tear resistance; Adding 1.5 parts of polyethylene wax improves mold release properties and enhances the smoothness of the extruded surface.

[0022] In this embodiment, preferably, traditional wind power cables used for wind power generation operate outdoors for extended periods, are vertically laid, and are frequently exposed to oil contamination and direct sunlight. Increasing the cable's temperature resistance rating can improve its current-carrying capacity in the same application scenario. According to statistics, the current-carrying capacity of a 240mm² cable with a temperature resistance of 90℃ is comparable to that of a 185mm² cable with a temperature resistance of 105℃. The current carrying capacity of the cable is equivalent to that of a mm² cable, so improving the temperature resistance rating of the cable can reduce the amount of copper used in the copper conductor, thus greatly reducing the cost of the wind power cable. Conductor 104 is a compound structure of copper core Category 5 conductor with copper foil wire incorporated. Its number of single wires and single wire diameter meet the requirements of Category 5 conductor in the national standard GB / T3956-2008, which is conducive to the bending of the cable. At the same time, an appropriate amount of copper foil wire is added to the center layer and the outermost layer of conductor 104. Copper foil wire has good elasticity, softness and bending, which can improve the torsional resistance of the cable. It uses 99.99% pure oxygen-free copper wire stranded together, with a cross-sectional diameter of 95-300 mm², and a 0.01 mm tin layer plated on the surface to enhance oxidation resistance.

[0023] Although embodiments of the present invention have been shown and described (see the detailed description above), it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A radiation-type flame-retardant, high-temperature resistant, torsion-resistant shielded flexible cable for wind power generation, characterized in that: The cable consists of, from the outside to the inside, a sheath (101), a wrapping layer (102), a metal shielding layer (103), an insulating sleeve (105), and a conductor (104). The outer surface of the sheath (101) is fitted with a functional sleeve (200), and there is a gap between the functional sleeve (200) and the end face of the sheath (101); A cutting portion is also formed near the end of the sheath (101), and a cutting trajectory is formed between the cutting portion and the end of the sheath (101).

2. The irradiated flame-retardant, high-temperature resistant, torsion-resistant shielded flexible cable for wind power generation according to claim 1, characterized in that: The cutting part is a positioning groove (107), and the end section of the positioning groove (107) is semi-circular; The depth of the positioning groove (107) is half the thickness of the sheath (101).

3. The irradiated flame-retardant, high-temperature resistant, torsion-resistant shielded flexible cable for wind power generation according to claim 2, characterized in that: The cutting trajectory formed between the positioning groove (107) and the end of the sheath (101) is a guide groove (106), the depth of which is equal to the depth of the positioning groove (107).

4. The irradiated flame-retardant, high-temperature resistant, torsion-resistant shielded flexible cable for wind power generation according to claim 3, characterized in that: The guide groove (106) is spirally distributed, and the longitudinal section of the end of the guide groove (106) is semi-circular.

5. The irradiated flame-retardant, high-temperature resistant, torsion-resistant shielded flexible cable for wind power generation according to claim 3, characterized in that: The outer side of the sheath (101) is also fitted with a functional sleeve (200). The outer wall of the functional sleeve (200) opposite to the positioning groove (107) has a locking groove (201). The end of the functional sleeve (200) opposite to the positioning groove (107) is provided with an integral connecting protrusion (202). The connecting protrusion (202) is connected to the surface of the sheath (101).

6. The irradiated flame-retardant, high-temperature resistant, torsion-resistant shielded flexible cable for wind power generation according to claim 1, characterized in that: The metal shielding layer (103) is made of tin-plated metal wire braid; the wrapping layer (102) is a low-smoke halogen-free flame-retardant wrapping.

7. The irradiated flame-retardant, high-temperature resistant, torsion-resistant shielded flexible cable for wind power generation according to claim 1, characterized in that: The conductor (104) is a composite structure consisting of a copper core, a type 5 conductor, and copper foil wires.

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