Low-smoke halogen-free cable

Abstract

The utility model discloses a low-smoke halogen-free cable, and belongs to the technical field of halogen-free cables. Comprising a sheath, a bending-resistant assembly is arranged on the circumferential inner wall of the sheath, a plurality of inner sleeves are arranged on the circumferential outer wall of a positioning rod, two insulating sleeves are arranged on the circumferential inner walls of the inner sleeves, conductors are arranged on the circumferential inner walls of the insulating sleeves, and a flame-retardant assembly is arranged on the circumferential outer wall of the sheath. According to the utility model, the shielding layer is used for shielding electromagnetic interference, the positioning rod and the supporting plate are used for conveniently positioning the inner sleeve, the chambers in the arc plates are extruded when the low-smoke halogen-free cable is bent, a conductor is conveniently protected from being damaged, the reinforcing ribs are used for effectively improving the bending resistance, the tensile wire filling material is used for enhancing the toughness between the sheath and the inner sleeve, and the service life of the low-smoke halogen-free cable is prolonged. And the high-temperature resistance is enhanced through the flame-retardant assembly, and conduction of external heat is reduced. According to the utility model, the structural design facilitates improvement of bending resistance, and the cable is not easy to damage when being bent, convenient and durable to use, good in flame-retardant effect and not easy to burn.

Description

Technical Field

[0001] This utility model relates to the field of halogen-free cable technology, and more specifically, to a low-smoke halogen-free cable. Background Technology

[0002] A cable is a single component that connects two devices to transmit electrical signals, formed by bonding, twisting, or braiding two or more conductors together. Low-smoke halogen-free is a material classification of wire sheaths in the wire and cable industry. Low-smoke halogen-free wire sheaths are made of thermoplastic or thermosetting materials that produce low smoke emissions when heated and do not contain halogens.

[0003] The prior art patent document with publication number CN219286089U provides a low-smoke halogen-free cable. This device can lock and limit the wire frame and the low-smoke halogen-free flame-retardant layer through a snap-fit ​​limiting mechanism, thereby maintaining the stability of the internal structure of the cable. This effectively increases the stability between the internal structures of the cable and prevents the internal structure of the cable from deforming or misaligning due to external forces, thus avoiding cable damage. This helps to ensure the normal use of the cable and improve its practicality. The buffer mechanism can realize the buffering effect of the conductor core, reduce the external forces on the conductor core, and thus achieve effective protection of the conductor core, preventing the conductor core from being damaged or short-circuited due to compression deformation.

[0004] Although the device has many beneficial effects, it still has the following problems: the device has poor bending resistance during use, the cable is easily damaged when bent, and it is not convenient to use; secondly, the flame retardant effect of the single-layer halogen-free flame retardant layer is not good enough during use and needs to be improved. In view of this, we propose a low-smoke halogen-free cable. Utility Model Content

[0005] 1. Technical problems to be solved

[0006] The purpose of this utility model is to provide a low-smoke halogen-free cable to solve the problems mentioned in the background art, such as poor bending resistance, easy damage when bending, inconvenience of use, and insufficient flame retardant effect of relying solely on a single layer of halogen-free flame retardant layer.

[0007] 2. Technical Solution

[0008] A low-smoke halogen-free cable includes a sheath. The inner circumference of the sheath has a bend-resistant component. The bend-resistant component includes a shielding layer. A positioning rod is inserted through the center of the shielding layer. The outer circumference of the positioning rod has multiple support plates. Each support plate has an arc plate at its other end. Each arc plate has multiple chambers and multiple reinforcing ribs. The inner circumference of the arc plate is filled with an anti-tensile filler. The outer circumference of the positioning rod has multiple inner sleeves. The inner circumference of each inner sleeve has two insulating sleeves. The inner circumference of each insulating sleeve has a conductor. The outer circumference of the sheath has a flame-retardant component.

[0009] Preferably, the flame-retardant component includes a mica tape, the outer circumferential wall of which is provided with a fiberglass mesh frame, the fiberglass mesh frame is filled with a plurality of halogen-free flame-retardant particles, the outer circumferential wall of which is provided with a ceramicized silicone rubber layer, and the outer circumferential wall of which is provided with a carbon fiber coating.

[0010] Preferably, a gap is maintained between adjacent arc plates, and both the support plate and the arc plates are made of silicone rubber.

[0011] Preferably, the mica tape is a synthetic fluorophlogopite mica tape wound together, and the halogen-free flame-retardant particles are HDPE blow-molded white particles.

[0012] Preferably, the shielding layer is made of tin-plated copper foil wire, the positioning rod is made of shape memory metal, and the tensile filler is made of PP-T60S.

[0013] Preferably, the insulating sleeve is made of ETFE, and the two insulating sleeves are twisted together.

[0014] Preferably, the sheath is made of irradiated cross-linked polyethylene, and the conductor is made of copper.

[0015] 3. Beneficial effects

[0016] Compared with existing technologies, the advantages of this utility model are:

[0017] This utility model shields electromagnetic interference through a shielding layer, facilitates the positioning of the inner sleeve through a positioning rod and a support plate, protects the conductor from damage by compressing the internal cavity of the arc plate when the low-smoke halogen-free cable is bent, effectively improves bending resistance through reinforcing ribs, and enhances the toughness between the sheath and the inner sleeve through anti-tension filler.

[0018] Secondly, the high-temperature resistance is enhanced by mica tape, and there is no volatilization of harmful smoke when it is exposed to open flame. The halogen-free flame-retardant particles filled inside the fiberglass mesh prevent combustion. The ceramicized silicone rubber layer melts into a ceramic state when the temperature rises to protect the low-smoke halogen-free cable. The carbon fiber coating reduces the conduction of external heat. The structural design of this utility model facilitates improved bending resistance, making the cable less prone to damage when bent. It is convenient to use, durable, and has good flame-retardant effect, making it less likely to burn. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the bending-resistant component of this utility model.

[0021] Figure 3 This is a schematic cross-sectional view of the arc plate part of this utility model;

[0022] Figure 4 This is a partial structural diagram of the flame-retardant component of this utility model.

[0023] Figure 5 This is a schematic diagram of the insulating sleeve part of this utility model;

[0024] The labels in the diagram are as follows: 1. Sheath; 2. Bending-resistant component; 3. Inner sleeve; 4. Insulating sleeve; 5. Conductor; 6. Flame-retardant component; 201. Shielding layer; 202. Positioning rod; 203. Support plate; 204. Arc plate; 205. Chamber; 206. Reinforcing rib; 207. Tensile filler; 601. Mica tape; 602. Fiberglass mesh frame; 603. Halogen-free flame-retardant granules; 604. Ceramicized silicone rubber layer; 605. Carbon fiber coating. Detailed Implementation

[0025] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0026] In the description of this utility model, "multiple" means two or more, unless otherwise explicitly specified.

[0027] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0028] Please see Figure 1-5 This utility model provides a technical solution:

[0029] A low-smoke halogen-free cable includes a sheath 1. A bending-resistant component 2 is fixedly provided on the inner circumference of the sheath 1. The bending-resistant component 2 includes a shielding layer 201. A positioning rod 202 is inserted through the center of the shielding layer 201. Multiple support plates 203 are fixedly provided on the outer circumference of the positioning rod 202. An arc plate 204 is fixedly provided at the other end of each support plate 203. Multiple chambers 205 are opened inside each arc plate 204. Multiple reinforcing ribs 206 are fixedly provided inside the arc plate 204. The inner circumference of the arc plate 204 is filled with tensile-resistant filler 207. Multiple inner sleeves 3 are snapped onto the outer circumference of the positioning rod 202. Two insulating sleeves 4 are bonded to the inner circumference of the inner sleeves 3. Conductors 5 are fixedly provided on the inner circumference of the insulating sleeves 4. A flame-retardant component 6 is bonded to the outer circumference of the sheath 1. This utility model uses a shielding layer 201 to shield electromagnetic interference, a positioning rod 202 and a support plate 203 to facilitate the positioning of the inner sleeve 3, a cavity 205 inside the arc plate 204 to protect the conductor 5 from damage when the low-smoke halogen-free cable is bent, a reinforcing rib 206 to effectively improve bending resistance, and an anti-tension filler 207 to enhance the toughness between the sheath 1 and the inner sleeve 3.

[0030] Specifically, the flame-retardant component 6 includes a mica tape 601, a fiberglass mesh frame 602 bonded to the outer circumference of the mica tape 601, multiple halogen-free flame-retardant particles 603 filled inside the fiberglass mesh frame 602, a ceramicized silicone rubber layer 604 bonded to the outer circumference of the fiberglass mesh frame 602, and a carbon fiber coating 605 coated on the outer circumference of the ceramicized silicone rubber layer 604. The mica tape 601 enhances high-temperature resistance and prevents the release of harmful fumes when exposed to open flame. The halogen-free flame-retardant particles 603 filling the fiberglass mesh frame 602 prevent combustion. The ceramicized silicone rubber layer 604 melts into a ceramic state when the temperature rises, protecting the low-smoke halogen-free cable. The carbon fiber coating 605 reduces the conduction of external heat.

[0031] Furthermore, a gap is maintained between adjacent arc plates 204, and both the support plate 203 and the arc plate 204 are made of silicone rubber. By maintaining a gap between adjacent silicone rubber arc plates 204, it is easy to maintain shrinkage space when the low-smoke halogen-free cable is bent, thereby improving bending resistance.

[0032] It is worth noting that the mica tape 601 is a synthetic fluorophlogopite tape wound around the edges, and the halogen-free flame-retardant granules 603 are white HDPE blow-molded granules. The synthetic fluorophlogopite tape effectively improves high-temperature resistance, provides a large safety margin, and facilitates high-temperature resistance. HDPE, or high-density polyethylene, is a highly crystalline thermoplastic resin with a semi-transparent, non-polar surface. It is non-toxic, odorless, and possesses good heat and cold resistance, good chemical stability, high rigidity and toughness, good mechanical strength, good dielectric properties, good resistance to environmental stress cracking, good wear resistance, electrical insulation, toughness, and cold resistance. It also exhibits good chemical stability and resistance to corrosion from acids, alkalis, and various salts.

[0033] It is worth noting that the shielding layer 201 is made of tin-plated copper foil wire, the positioning rod 202 is made of shape memory metal, and the tensile filler 207 is made of PP-T60S. The shape memory metal positioning rod 202 facilitates repositioning after bending, extending its service life. The tin-plated copper foil wire shielding layer 201 improves the bending resistance of the low-smoke halogen-free cable and prevents the cables from squeezing and rubbing against each other.

[0034] In addition, the insulating sleeve 4 is made of ETFE, and the two insulating sleeves 4 are twisted together. ETFE is an ethylene-tetrafluoroethylene copolymer, a chemical substance, and the toughest fluoroplastic. While maintaining good heat resistance, chemical resistance, and electrical insulation properties, it has significantly improved radiation resistance and mechanical properties. By twisting the insulating sleeves 4 together, the electromagnetic waves radiated by conductor 5 during transmission can be canceled out by the electromagnetic waves emitted by the other conductor 5, effectively reducing the degree of signal interference.

[0035] Furthermore, the sheath 1 is made of irradiated cross-linked polyethylene, and the conductor 5 is made of copper. The irradiated cross-linked polyethylene sheath 1 enhances transmission capacity and short-term overload capability, and improves the heat resistance, insulation, chemical corrosion resistance, aging resistance, and mechanical strength of the low-smoke halogen-free cable. The copper conductor 5 improves conductivity.

[0036] Working principle: When this device is needed for the use of low-smoke halogen-free cables, multiple inner sleeves 3 are arrayed on the outer circumference of the positioning rod 202. Two intertwined insulating sleeves 4 are set on the inner circumference of the inner sleeve 3. The conductor 5 is wrapped on the inner circumference of the insulating sleeve 4. Mica tape 601 is wrapped around the outer circumference of the sheath 1. Fiberglass mesh frame 602 is bonded to the outer circumference of the mica tape 601. Ceramicized silicone rubber layer 604 is bonded to the outer circumference of the fiberglass mesh frame 602. Carbon fiber coating 605 is coated on the outer circumference of the ceramicized silicone rubber layer 604. When the low-smoke halogen-free cable is bent, the arc plate 204 is squeezed and the chamber 205 is compressed. The cable returns to its original shape after being straightened.

[0037] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A low-smoke halogen-free cable, comprising a sheath (1), characterized in that: The sheath (1) has a bending-resistant component (2) on its inner circumference. The bending-resistant component (2) includes a shielding layer (201). A positioning rod (202) is inserted through the center of the shielding layer (201). The positioning rod (202) has multiple support plates (203) on its outer circumference. Each support plate (203) has an arc plate (204) at its other end. Each arc plate (204) has multiple chambers (205) inside. Each arc plate (204) has multiple reinforcing ribs (206) inside. The inner circumference of the arc plate (204) is filled with tensile filler (207). The positioning rod (202) has multiple inner sleeves (3) on its outer circumference. Each inner sleeve (3) has two insulating sleeves (4) on its inner circumference. Each insulating sleeve (4) has a conductor (5) on its inner circumference. The sheath (1) has a flame-retardant component (6) on its outer circumference.

2. The low-smoke halogen-free cable according to claim 1, characterized in that: The flame-retardant component (6) includes a mica tape (601), the outer circumference of which is provided with a fiberglass mesh frame (602), the fiberglass mesh frame (602) is filled with a plurality of halogen-free flame-retardant particles (603), the outer circumference of which is provided with a ceramicized silicone rubber layer (604), and the outer circumference of which is provided with a carbon fiber coating (605).

3. The low-smoke halogen-free cable according to claim 2, characterized in that: A gap is maintained between adjacent arc plates (204), and both the support plate (203) and the arc plate (204) are made of silicone rubber.

4. The low-smoke halogen-free cable according to claim 3, characterized in that: The mica tape (601) is a synthetic fluorophlogopite mica tape wound together, and the halogen-free flame-retardant granules (603) are HDPE blow-molded white granules.

5. The low-smoke halogen-free cable according to claim 4, characterized in that: The shielding layer (201) is made of tin-plated copper foil wire, the positioning rod (202) is made of shape memory metal, and the tensile filler (207) is made of PP-T60S.

6. The low-smoke halogen-free cable according to claim 5, characterized in that: The insulating sleeve (4) is made of ETFE, and the two insulating sleeves (4) are twisted together.

7. The low-smoke halogen-free cable according to claim 6, characterized in that: The sheath (1) is made of irradiated cross-linked polyethylene, and the conductor (5) is made of copper.

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