Universal rubber sleeve flexible cable

Abstract

The utility model discloses a general rubber sleeve flexible cable, which comprises a conductor, an insulating layer and an outer sheath, the insulating layer is coated outside the conductor to form an insulating wire core, and more than one insulating wire core is integrally arranged inside the outer sheath; or an inner sheath is arranged outside the more than one insulating wire core and then an outer sheath is wrapped outside the more than one insulating wire core, the outer sheath is a single-color outer sheath or a double-color outer sheath, the double-color outer sheath is divided into a first outer sheath and a second outer sheath by a color area, and the first outer sheath and the second outer sheath are symmetrically distributed on the circumference of the cross section of the cable. The proportion of the color of any sheath on the circumference is not lower than 20% and not higher than 80%, a double-layer co-extrusion or three-layer co-extrusion one-time forming process method is adopted for production, the extrusion production pressure is increased, it is guaranteed that gaps among the insulated wire cores are filled more compactly, the appearance is round and full, the relative positions among the insulated wire cores are more stable, the product quality is improved, and the production cost is reduced. The problem that a fried dough twist easily occurs during moving and using can be solved, and the service life is prolonged.

Description

Technical Field

[0001] This utility model belongs to the field of flexible cables and relates to a general-purpose rubber-sheathed flexible cable. Background Technology

[0002] General-purpose rubber-sheathed flexible cables are a traditional product in the cable industry, mainly used for mobile power cords in electrical equipment. They are characterized by flexibility, bending resistance, aging resistance, and oil resistance, and are widely used in household appliances, power tools, and mobile equipment, making them irreplaceable. However, this product has some problems and shortcomings in application, mainly manifested in: an uneven and full appearance, tendency to twist during use, and frequent damage from being moved or crushed by objects. Intense price competition also leads to the prevalence of inferior products being sold as high-quality ones. To address these problems and shortcomings, a new type of general-purpose rubber-sheathed flexible cable has been designed, which can improve product technology and quality, reduce product costs, increase product recognition, extend product lifespan, and enhance the user experience. Utility Model Content

[0003] The purpose of this utility model is to provide a universal rubber-sheathed flexible cable, which adopts a double-layer co-extrusion or triple-layer co-extrusion one-time molding process to realize the production of inner sheath, first outer sheath, second outer sheath, and single-color outer sheath. It increases the extrusion production pressure, ensures that the gaps between the insulated wire cores are filled more tightly, the appearance is round and full, the relative position between the insulated wire cores is more stable, the product quality is improved, it can solve the problem of easy twisting during mobile use, and improve the service life.

[0004] The technical solution adopted in this utility model is as follows:

[0005] A general-purpose rubber-sheathed flexible cable includes a conductor, an insulation layer, and an outer sheath. The insulation layer covers the outside of the conductor to form an insulated core. One or more insulated cores are integrally disposed inside the outer sheath; or an inner sheath is disposed outside one or more insulated cores and then an outer sheath is disposed thereafter. The outer sheath is a single-color outer sheath or a two-color outer sheath. The two-color outer sheath is distinguished by color as a first outer sheath and a second outer sheath. The first outer sheath and the second outer sheath are symmetrically distributed on the circumference of the cable cross-section. The proportion of any sheath color on the circumference is not less than 20% and not more than 80%.

[0006] Furthermore, the number of insulated wire cores is three, and the three insulated wire cores are arranged in a triangular shape to form a wire bundle. The three insulated wire cores use different colored insulation layers as distinguishing indicators.

[0007] Furthermore, the conductor is made of stranded soft copper wire; the insulation layer is made of ethylene propylene insulating rubber extruded through a continuous vulcanization production line.

[0008] Furthermore, the inner sheath is formed by extruding waterproof colored natural styrene-butadiene rubber or flame-retardant waterproof colored natural styrene-butadiene rubber together with the outer sheath in one step through a double-layer co-extrusion continuous vulcanization production line.

[0009] Furthermore, the inner sheath forms a tangent circle with the insulated wire core.

[0010] Furthermore, the monochrome outer sheath and the inner sheath are distinguished by different colors, forming a double-layer, dual-color cable with the inner sheath and the monochrome outer sheath combined.

[0011] Furthermore, different colors are used to distinguish between the inner sheath and the two-color outer sheath, forming a double-layer three-color structure cable.

[0012] Furthermore, the first outer sheath and the second outer sheath are formed by extruding the same chlorinated polyethylene rubber or flame-retardant chlorinated polyethylene rubber together with the inner sheath in one step through a three-layer co-extrusion continuous vulcanization production line, and adopt a bright color or color combination different from that of the inner sheath.

[0013] Furthermore, the proportion of either color of the first outer sheath or the second outer sheath on the circumference is 50%, and the circular cross-section of the two-color outer sheath is divided into four or more even-numbered segments. The first outer sheath and the second outer sheath are arranged at intervals on the equally divided sheaths to form a single-layer two-color structure cable.

[0014] Furthermore, the inner sheath and outer sheath are extruded together in one step to form a cable.

[0015] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are:

[0016] 1. Improved service life: The production of the inner and outer sheaths is achieved through a one-time molding process using double-layer or triple-layer co-extrusion, which increases the extrusion production pressure, ensuring that the gaps between the insulated wire cores are filled more tightly, resulting in a round and full appearance. The relative positions between the insulated wire cores are also more stable, improving product quality and solving the problem of easy twisting during mobile use, thus extending service life.

[0017] 2. Protection against damage and counterfeiting: The two- or three-color sheath introduces bright colors, which serve as warning and marking colors, preventing the cable from being damaged by mobile equipment or objects during use. At the same time, it can effectively prevent counterfeiting and the use of inferior products by competitors.

[0018] 3. Reduced costs: The double-layer sheath not only reduces the manufacturing process of the filler strip, but also reduces the material and process costs of general rubber-sheathed flexible cables by using a special low-cost filler rubber for the inner sheath.

[0019] 4. Improved Safety Performance: The inner sheath can be made of special low-cost waterproof colored natural styrene-butadiene rubber or special low-cost flame-retardant waterproof colored natural styrene-butadiene rubber. The single-color outer sheath or the first and second outer sheaths can be made of chlorinated polyethylene rubber or flame-retardant chlorinated polyethylene rubber. By selecting and combining the inner and outer sheath materials, the flexibility, bending resistance, waterproofness, mechanical impact resistance, and flame retardancy of the general-purpose rubber-sheathed flexible cable can be improved. The cable can meet the flame retardant performance requirements for single vertical combustion, as well as the flame retardant Class A, Class B, or Class C requirements for bundled combustion. This improves the safety of cable use, meets the diverse needs of users, and enhances the product's market competitiveness. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly described below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort, wherein:

[0021] Figure 1 This is a schematic diagram of the structure of a traditional general-purpose rubber-sheathed flexible cable with a filler strip.

[0022] Figure 2 This is a schematic diagram of the structure of a traditional general-purpose rubber-sheathed flexible cable with an outer sheath filling type.

[0023] Figure 3 This is a schematic diagram of the structure of the universal rubber-sheathed flexible cable with double-layer three-color sheath.

[0024] Figure 4 This is a schematic diagram of the structure of the universal rubber-sheathed flexible cable with double-layer, double-color sheath.

[0025] Figure 5 This is a schematic diagram of the structure of a single-layer, two-color sheathed universal rubber-sheathed flexible cable of this utility model.

[0026] The markings in the diagram are as follows: 1. Conductor 2. Insulation layer 3. Two-color outer sheath 301. First outer sheath 302. Second outer sheath 4. Single-color outer sheath 5. Inner sheath 6. Filler strip. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the present utility model and are not intended to limit the present utility model; that is, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The components of the embodiments of the present utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0028] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0029] It should be noted that relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0030] The features and performance of this utility model will be further described in detail below with reference to the embodiments.

[0031] Example 1

[0032] like Figure 1 Figure 2 As shown, a traditional general-purpose rubber-sheathed flexible cable typically consists of a conductor 1, an insulation layer 2, a filler, and an outer sheath, which is usually black. Figure 1 The Type 6 filler bar traditional general-purpose rubber-sheathed flexible cable is characterized by low material cost but high manufacturing cost. Figure 2 Traditional general-purpose rubber-sheathed flexible cables with outer sheath filling are characterized by high material costs but low manufacturing costs. Figure 1 , Figure 2The traditional general-purpose rubber-sheathed flexible cable shown is prone to having an uneven and less full appearance due to insufficient filling of the gaps between the insulated cores. It is also prone to twisting during use, has a short service life, and the black sheath is not easy to identify, making it easy to be damaged by mobile equipment or objects, thus causing safety accidents.

[0033] like Figure 5 As shown, this is a single-layer, two-color sheathed general-purpose rubber-sheathed flexible cable. A preferred embodiment of this utility model provides a general-purpose rubber-sheathed flexible cable, which includes a conductor 1, an insulation layer 2, and an outer sheath. The insulation layer 2 covers the outside of the conductor 1 to form an insulated core. One or more insulated cores are integrally disposed inside the outer sheath. The outer sheath is a two-color outer sheath 3, which is divided into a first outer sheath 301 and a second outer sheath 302 by color. The first outer sheath 301 and the second outer sheath 302 are symmetrically distributed on the circumference of the cable cross-section. The proportion of any sheath color on the circumference is not less than 20% and not more than 80%.

[0034] The number of insulated wire cores is three, and the three insulated wire cores are arranged in a triangular shape to form a wire bundle. The three insulated wire cores use different colored insulation layers 2 as distinguishing indicators.

[0035] The conductor 1 is made of stranded soft copper wire, which is either Category 5 or Category 6 soft copper wire; the insulation layer 2 is made of ethylene propylene insulating rubber extruded through a continuous vulcanization production line.

[0036] The first outer sheath 301 and the second outer sheath 302 are formed in one step by extruding the same chlorinated polyethylene rubber or flame-retardant chlorinated polyethylene rubber through a double-layer co-extrusion continuous vulcanization production line. Black and bright colors such as red, yellow, green, and blue are preferred, but any combination of two colors other than black and gray (non-bright color combinations) can also be used.

[0037] The first outer sheath 301 and the second outer sheath 302 should be symmetrically distributed around the circumference, and their proportion should preferably be set to 50%.

[0038] The first outer sheath 301 and the second outer sheath 302 are made of chlorinated polyethylene rubber or flame-retardant chlorinated polyethylene rubber, which has excellent UV resistance, atmospheric aging resistance, oil resistance and flame retardancy. The cable can be used in outdoor and oil-resistant environments.

[0039] Example 2

[0040] Based on Example 1, a general-purpose rubber-sheathed flexible cable with an inner sheath forming a double-sheath structure is provided. It includes a conductor 1, an insulation layer 2, an inner sheath, and an outer sheath. The insulation layer 2 covers the conductor 1 to form an insulated core. An inner sheath 5 is provided around one or more insulated cores, and then an outer sheath is provided to cover them. The outer sheath is a single-color outer sheath 4 or a two-color outer sheath 3. For example, a two-color outer sheath 3 is used. Figure 3 As shown, this is a double-layer, three-color sheathed general-purpose rubber-sheathed flexible cable; it uses a single-color outer sheath (4...). Figure 4 As shown, this is a double-layer, two-color sheathed general-purpose rubber-sheathed flexible cable; the two-color outer sheath 3 is divided into a first outer sheath 301 and a second outer sheath 302 by color. The first outer sheath 301 and the second outer sheath 302 are symmetrically distributed on the circumference of the cable cross-section, and the proportion of any sheath color on the circumference is not less than 20% and not more than 80%.

[0041] For double-layer three-color sheathed general rubber-sheathed flexible cables (such as...) Figure 3 The first outer sheath 301 and the second outer sheath 302 are formed in one step by extruding the same chlorinated polyethylene rubber or flame-retardant chlorinated polyethylene rubber together with the inner sheath 5 through a three-layer co-extrusion continuous vulcanization production line. This results in excellent UV resistance, atmospheric aging resistance, oil resistance, and flame retardancy, making the cable suitable for outdoor and oil-resistant applications. Preferred colors are black and bright colors such as red, yellow, green, and blue, different from the inner sheath 5. Any combination of two colors other than black and gray (excluding non-bright colors) can also be used. The inner sheath 5 and the two-color outer sheath 3 are distinguished by different colors, forming a double-layer, three-color cable structure. This effectively identifies the cable and prevents counterfeit products. The inner sheath 5 is formed in one step by extruding waterproof colored natural styrene-butadiene rubber or flame-retardant waterproof colored natural styrene-butadiene rubber together with the two-color outer sheath 3 through a three-layer co-extrusion continuous vulcanization production line. The inner sheath 5 forms a tangent circle with the insulated core to avoid reducing the mechanical performance of the first outer sheath 301 and the second outer sheath 302. The inner sheath 5 is made of special low-cost waterproof colored natural styrene-butadiene rubber or special low-cost flame-retardant waterproof colored natural styrene-butadiene rubber. First, the high elasticity of natural styrene-butadiene rubber absorbs mechanical compressive stress, thereby improving the service life of the cable. Second, the softness of natural styrene-butadiene rubber improves the flexibility and bending resistance of the cable. Third, the water resistance of natural styrene-butadiene rubber improves the waterproof function of the cable and expands the application of the product.

[0042] For double-layer, two-color sheathed general-purpose rubber-sheathed flexible cables (such as...) Figure 4The single-color outer sheath 4 is formed by extruding chlorinated polyethylene rubber or flame-retardant chlorinated polyethylene rubber together with the inner sheath 5 in a single process using a double-layer co-extrusion continuous vulcanization production line. It possesses excellent UV resistance, atmospheric aging resistance, oil resistance, and flame-retardant properties, making the cable suitable for outdoor and oil-resistant applications. Bright colors such as red, yellow, green, and blue, different from the inner sheath 5, are preferred; black is also an option. The single-color outer sheath 4 and inner sheath 5 are distinguished by different colors, forming a double-layer, two-color cable structure combining the inner sheath 5 and the single-color outer sheath 4. The inner sheath 5 is formed by extruding a special low-cost waterproof colored natural styrene-butadiene rubber or a special low-cost flame-retardant waterproof colored natural styrene-butadiene rubber together with the single-color outer sheath 4 in a single process using a double-layer co-extrusion continuous vulcanization production line. This material utilizes the high elasticity of natural styrene-butadiene rubber to absorb mechanical compressive stress, thereby improving the cable's service life; secondly, it utilizes the flexibility of natural styrene-butadiene rubber to improve the cable's flexibility and bending resistance; and thirdly, it utilizes the water resistance of natural styrene-butadiene rubber to improve the cable's waterproof function, expanding the product's applications.

[0043] The proportion of any color of the first outer sheath 301 and the second outer sheath 302 on the circumference is preferably set to 50%. The circular cross-section of the two-color outer sheath 3 is divided into four or more even-numbered segments. The first outer sheath 301 and the second outer sheath 302 are arranged at intervals on the evenly divided sheaths to form a single-layer two-color structure cable. Of course, it can also be set to consist of two color segments or more segments, as long as it is eye-catching enough. Of course, the number of segments should also be controlled to avoid making the processing complicated.

[0044] The inner sheath 5 and the outer sheath are extruded together in one step to form a cable, which simplifies the processing technology while also providing good performance.

[0045] Technical Principle: This utility model designs a double-layer, three-color sheathed universal rubber-sheathed flexible cable (such as...). Figure 3 Double-layer, two-color sheathed general-purpose rubber-sheathed flexible cable (such as...) Figure 4 Single-layer, two-color sheathed general-purpose rubber-sheathed flexible cable (such as...) Figure 5 Double-layered, three-color sheathed general-purpose rubber-sheathed flexible cable (such as...) Figure 3 The cable consists of a conductor, an insulation layer, an inner sheath, a first outer sheath, and a second outer sheath. It is manufactured using a three-layer co-extrusion process, where the inner sheath, first outer sheath, and second outer sheath are formed in a single step. Double-layer, two-color sheathed general-purpose rubber-sheathed flexible cables (such as...) Figure 4 It consists of a conductor, an insulation layer, an inner sheath, and an outer sheath. The inner and outer sheaths are produced using a double-layer co-extrusion process. Single-layer, two-color sheathed general-purpose rubber-sheathed flexible cables (such as...) Figure 5The cable consists of a conductor, an insulation layer, a first outer sheath, and a second outer sheath. The first and second outer sheaths are produced using a double-layer co-extrusion process. By selecting and combining different inner and outer sheath materials, the flexibility, bending resistance, water resistance, mechanical impact resistance, and flame retardant properties of general-purpose rubber-sheathed flexible cables can be improved. This results in products with different flame retardant grades, such as Class A (single vertical combustion flame retardant) and Class B (bundled combustion flame retardant), enhancing cable safety, meeting diverse user needs, and improving product market competitiveness.

[0046] The above description is only a preferred embodiment of the present utility model and is not intended to limit the scope of protection of the present utility model. Any modifications, equivalent substitutions and improvements made by those skilled in the art within the spirit and principles of the present utility model should be included within the scope of protection of the present utility model.

Claims

1. A general purpose rubber-jacketed flexible cable, characterized by: It includes a conductor, an insulating layer, an outer sheath, the insulating layer is wrapped outside the conductor to form an insulated core, one or more insulated cores are arranged inside the outer sheath; or an inner sheath is arranged outside one or more insulated cores, and then an outer sheath is wrapped, the outer sheath is a double-color outer sheath, the double-color outer sheath is divided into a first outer sheath and a second outer sheath by color, the first outer sheath and the second outer sheath are symmetrically distributed on the circumference of the cable cross section, and the proportion of the color of any sheath on the circumference is not less than 20% and not higher than 80%.

2. A general rubber-jacketed flexible cable according to claim 1, characterized in that: The number of the insulated cores is three, the three insulated cores are arranged in a triangular shape to form a wire bundle, and different colors of the insulating layers are used as distinguishing indications.

3. A general purpose rubber-jacketed flexible cable according to claim 2, characterized in that: The conductor is twisted by soft copper wires; the insulating layer is extruded by ethylene-propylene insulating layer rubber through a continuous vulcanization production line.

4. A general purpose rubber-jacketed flexible cable according to claim 3, characterized in that: The inner sheath is made of waterproof colored natural styrene-butadiene rubber or flame-retardant waterproof colored natural styrene-butadiene rubber through a double-layer co-extrusion continuous vulcanization production line and the outer sheath is extruded and formed at one time.

5. A general purpose rubber-jacketed flexible cable according to claim 4, characterised in that: The inner sheath and the insulated core form a tangent circle.

6. A general rubber-jacketed flexible cable according to claim 1 or 5, characterized in that: The inner sheath and the double-color outer sheath are distinguished by different colors to form a double-layer three-color structure cable.

7. A general purpose rubber-jacketed flexible cable according to claim 6, characterised in that: The first outer sheath and the second outer sheath are made of the same chlorinated polyethylene rubber or flame-retardant chlorinated polyethylene rubber through a three-layer co-extrusion continuous vulcanization production line and the inner sheath is extruded and formed at one time, and different bright colors or color combinations are used.

8. A general purpose rubber-jacketed flexible cable according to claim 7, characterized in that: The proportion of the color of any sheath on the circumference is 50%, the circular cross section of the double-color outer sheath is evenly divided into an even number of more than four segments, and the first outer sheath and the second outer sheath are arranged at intervals on the divided sheath to form a single-layer double-color structure cable.

9. A general purpose rubber-jacketed flexible cable according to claim 1, characterized in that: The inner sheath and the outer sheath are extruded and formed at one time to form a cable.

Images