Low-smoke halogen-free cable for telecommunication communication cable

Abstract

The utility model discloses a telecommunication communication cable used low smoke zero halogen cable, comprising a sleeve and a cable core, the sleeve is internally provided with a through groove, the through groove is internally provided with an inner pipe, the cable core is arranged in the inner pipe, the outer wall of the inner pipe is provided with a buffer assembly, the buffer assembly comprises a fixing ring, and the fixing ring is provided with a through hole. A first buffer piece, a second buffer piece and a third buffer piece are fixedly connected to the surface of the fixing ring, sliding blocks are arranged at the two ends of the first buffer piece, the two ends of the second buffer piece and the two ends of the third buffer piece, sliding rails are fixedly connected to the positions, corresponding to the sliding blocks, of the surface of the through groove, and the sliding blocks slide in the sliding rails. According to the utility model, the buffer assembly is arranged between the inner pipe and the through groove, when the cable is subjected to heavy pressure and the like, the sleeve is extruded inwards, the pressure acts on the three buffer sheets, and the metal characteristics of the buffer sheets are utilized to buffer the pressure, so that the pressure is prevented from directly acting on the cable and damaging the cable.

Description

Technical Field

[0001] The utility model relates to the technical field of telecommunication communication engineering cables, in particular to a low-smoke halogen-free cable for telecommunication communication cables. Background Art

[0002] Cable is a single component that connects two devices to transmit electrical signals by bonding, twisting or weaving two or more wires together. With the continuous development of communication technology, the performance of cables has gradually been improved. For places with high safety and environmental protection requirements, such as high-rise buildings, stations, subways, airports, hospitals, schools, shopping malls and other crowded places, low-smoke halogen-free cables with halogen-free, low-smoke and flame-retardant effects are needed. Low-smoke halogen-free cables refer to cables whose insulation layer materials do not release halogen-containing gases when burned, with low smoke concentration, and are safer and more environmentally friendly.

[0003] In the prior art, insulating and high-temperature resistant materials are generally wrapped on the outside of the cable. After the cable is laid, when the cable encounters high temperature conditions, the special material wrapped therein can protect the cable, and in the event of combustion, the material can be prevented from releasing halogen-containing gases as much as possible and the smoke concentration can be low. However, when the cable is subjected to heavy pressure, the cable lacks a structure for buffering, which can cause the internal cable to break and be damaged. After the cable breaks, it needs to be replaced as a whole, resulting in a waste of resources. Therefore, the low-smoke halogen-free cable in the prior art is in urgent need of a structure that can buffer heavy pressure, etc., and thus a low-smoke halogen-free cable for telecommunication cables is proposed. Utility Model Content

[0004] The utility model aims to provide a low-smoke halogen-free cable for telecommunication cables, so as to solve the problem in the prior art that the cable lacks a structure for buffering against heavy pressure and the like, resulting in the cable being easily damaged.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: comprising a sleeve and a cable core, the sleeve having a through groove inside, an inner tube arranged inside the through groove, the cable core arranged inside the inner tube, a buffer assembly provided on the outer wall of the inner tube, the buffer assembly comprising a fixed ring, a first buffer sheet, a second buffer sheet and a third buffer sheet fixedly connected to the surface of the fixed ring, sliders being provided at both ends of the first buffer sheet, the second buffer sheet and the third buffer sheet, a slide rail being fixedly connected to the position of the slide rail on the surface of the through groove corresponding to the position of the slide rail, and the slide rail slides inside the slide rail.

[0006] Preferably, the first buffer sheet, the second buffer sheet and the third buffer sheet have the same shape and are made of flexible metal sheets with an arc structure, and the first buffer sheet, the second buffer sheet and the third buffer sheet are equidistantly arranged with respect to the fixing ring.

[0007] Preferably, four groups of the buffer components are equidistantly arranged inside the through slot so as to provide buffering for the entire inner tube.

[0008] Preferably, the number of the through grooves is three, and the three through grooves are equidistantly arranged about the center of the sleeve, and a cable core is arranged inside each of the through grooves.

[0009] Preferably, the outer wall of the casing is provided with a protective component, the protective component includes a flame retardant layer, the flame retardant layer is fixedly connected to the outer wall of the casing, the surface of the flame retardant layer is fixedly connected to a reinforcement layer, the surface of the reinforcement layer is fixedly connected to a mineral insulation layer, and the surface of the mineral insulation layer is fixedly connected to an outer protective casing tube.

[0010] Preferably, the lengths of the flame retardant layer, the reinforcement layer, the mineral insulation layer and the outer sheath are all the same as the length of the casing, so as to provide all-round protection for the cable core.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] 1. The utility model provides a buffer assembly between the inner tube and the through groove. When the cable is subjected to heavy pressure, the sleeve will be squeezed inward. At this time, the pressure will act on the three buffer sheets. The metal properties of the buffer sheets are used to buffer the pressure, thereby preventing the pressure from directly acting on the cable and causing damage to the cable.

[0013] 2. The utility model can also effectively protect the environment and the cable itself when a fire occurs in the cable by setting up multiple layers of materials, thereby minimizing the loss. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the overall structure of a low-smoke halogen-free cable for telecommunication cables of the utility model;

[0015] Figure 2 This is a cross-sectional view of the overall structure of a low-smoke halogen-free cable for telecommunication cables of the utility model;

[0016] Figure 3 This is a partial structural cross-sectional view of a low-smoke halogen-free cable for telecommunication cables of the utility model;

[0017] Figure 4 This is a schematic diagram of the structure of a low-smoke halogen-free cable buffer assembly for telecommunication cables of the utility model;

[0018] Figure 5 This is an enlarged view of the structure of a low-smoke halogen-free cable protection component for telecommunication cables of the utility model.

[0019] In the figure: 1. casing; 2. cable core; 3. inner tube; 4. buffer assembly; 401. fixing ring; 402. first buffer sheet; 403. second buffer sheet; 404. third buffer sheet; 405. slide rail; 5. protection assembly; 501. flame retardant layer; 502. reinforcement layer; 503. mineral insulation layer; 504. outer sheath; 6. through groove. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] See also Figure 1-5The utility model provides a technical solution: it includes a sleeve 1, which is a cylindrical solid insulating rubber tube. Three circular through grooves 6 are equidistantly provided inside the sleeve 1. An inner tube 3 is arranged inside the through groove 6. The inner tube 3 is made of refractory material. Three cable cores 2 are arranged inside one inner tube 3. Three cable cores 2 are arranged inside the three inner tubes 3. Buffer components 4 are arranged between the three inner tubes 3 and the three through grooves 6. The buffer component 4 can buffer the pressure generated outside to avoid the pressure directly acting on the cable core 2, thereby causing damage to the cable core 2. The buffer component 4 includes a fixing ring 401. The fixing ring 401 is made of a hard metal material. The fixing ring 401 and the surface of the inner tube 3 are adhered to each other. When heavy pressure is applied, the fixing ring 401 can effectively protect the internal cable core 2 through its characteristics. A first buffer sheet 402, a second buffer sheet 403 and a third buffer sheet 404 are welded on the surface of the fixing ring 401. The first buffer sheet 402 The first, second and third buffer sheets 403 and 404 have the same shape and structure, and are all metal sheets made of spring steel. The metal sheets are bent into an arc shape and arranged between the fixing ring 401 and the inner wall of the through slot 6. A convex slider is welded at both ends of the first, second and third buffer sheets 402 and 403, and a slide rail 405 is arranged at the position of the slider on the inner wall of the through slot 6. The slide rail 405 is a ring-shaped structure with a concave inner surface. The slide rail 405 is welded on the inner wall of the through slot 6, and the slider is stuck inside the slide rail 405. When the cable is under pressure, it will be squeezed toward the middle. Under the pressure, the first, second and third buffer sheets 402, 403 and 404 will be squeezed and begin to stretch toward both ends, and then the slider slides inside the slide rail 405 to buffer the pressure. Four buffer components 4 are equidistantly arranged between the inner tube 3 and the through slot 6, and the four buffer components 4 receive the pressure on the entire cable evenly.

[0022] A protective component 5 is arranged on the outside of the casing 1, and the protective component 5 can protect the cable to avoid safety accidents caused by sudden situations such as fire or the cable itself. The protective component 5 includes a flame retardant layer 501, and the flame retardant layer 501 is adhered to the surface of the casing 1. The flame retardant layer 501 adopts a halogen-free nylon belt material, and the flame retardant layer 501 covers the surface of the casing 1 to prevent combustion as much as possible in all directions. A reinforcement layer 502 is adhered to the surface of the flame retardant layer 501. The reinforcement layer 502 adopts a tubular mesh structure woven by steel wire and is wrapped on the surface of the flame retardant layer 501, which improves the overall compression resistance of the cable. A mineral insulation layer 503 is adhered to the surface of the reinforcement layer 502. The mineral insulation layer 503 significantly improves the overall fire resistance and compression resistance of the cable. The mineral insulation layer 503 is composed of high-temperature resistant, non-flammable magnesium oxide material. Beautiful mica powder is added to the magnesium oxide to improve the fire resistance and compression resistance. When the cable burns, it can reduce the generation of harmful gases, making it safer and more environmentally friendly. The last layer of outer sheath 504 is adhered to the outside of the mineral insulation layer 503. The outer sheath 504 is made of polyolefin material with mica powder and elastic ceramic fine powder added, which can significantly improve the compression resistance of the cable.

[0023] Working principle: When in use, the utility model can firstly protect the cable core 2 inside the casing 1 as much as possible. When a fire occurs outside or the cable core 2 itself is in an emergency due to combustion, the outer sheath 504, the flame retardant layer 501 and the mineral insulation layer 503 can be used to reduce the loss and the generation of harmful halogen as much as possible. When the outside world puts heavy pressure on the cable core 2, a series of protective components 5 will be used to apply pressure to the casing 1, and the casing 1 will be squeezed toward the central through groove 6. The through groove 6 will squeeze the inner tube 3 due to the pressure. At this time, the buffer component 4 will take effect. The pressure of the through groove 6 acts on the first buffer sheet 402, the second buffer sheet 403 and the third buffer sheet 404, and then slides inside the slide rail 405 through the sliders at both ends, and uses its unique metal toughness to buffer the pressure. There is also a reinforcement layer 502 to protect the cable core 2, to resist pressure for the cable core 2 as much as possible, and to avoid damage due to external pressure.

[0024] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0025] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A low-smoke halogen-free cable for telecommunication cables, comprising a casing (1) and a cable core (2), characterized in that: The sleeve (1) is provided with a through groove (6), an inner tube (3) is arranged inside the through groove (6), the cable core (2) is arranged inside the inner tube (3), a buffer assembly (4) is arranged on the outer wall of the inner tube (3), the buffer assembly (4) comprises a fixing ring (401), a first buffer sheet (402), a second buffer sheet (403) and a third buffer sheet (404) are fixedly connected to the surface of the fixing ring (401), sliders are arranged at both ends of the first buffer sheet (402), the second buffer sheet (403) and the third buffer sheet (404), a slide rail (405) is fixedly connected to the position of the slide rail on the surface of the through groove (6), and the slide rail slides inside the slide rail (405).

2. The low-smoke halogen-free cable for telecommunication cables according to claim 1, characterized in that: The first buffer sheet (402), the second buffer sheet (403) and the third buffer sheet (404) have the same shape and are made of flexible metal sheets with an arc structure. The first buffer sheet (402), the second buffer sheet (403) and the third buffer sheet (404) are equidistantly arranged with respect to the fixing ring (401).

3. The low-smoke halogen-free cable for telecommunication cables according to claim 1, characterized in that: Four groups of the buffer components (4) are arranged at equal intervals inside the through groove (6) so as to provide buffering for the inner tube (3) as a whole.

4. The low-smoke halogen-free cable for telecommunication cables according to claim 1, characterized in that: The number of the through grooves (6) is three, and the three through grooves (6) are arranged equidistantly with respect to the center of the sleeve (1), and a cable core (2) is arranged inside each of the through grooves (6).

5. The low-smoke halogen-free cable for telecommunication cables according to claim 1, characterized in that: The outer wall of the casing (1) is provided with a protective component (5), the protective component (5) comprising a flame retardant layer (501), the flame retardant layer (501) is fixedly connected to the outer wall of the casing (1), the surface of the flame retardant layer (501) is fixedly connected to a reinforcement layer (502), the surface of the reinforcement layer (502) is fixedly connected to a mineral insulation layer (503), and the surface of the mineral insulation layer (503) is fixedly connected to an outer sheath tube (504).

6. The low-smoke halogen-free cable for telecommunication cables according to claim 5, characterized in that: The lengths of the flame retardant layer (501), the reinforcement layer (502), the mineral insulation layer (503) and the outer sheath tube (504) are all the same as the length of the sheath tube (1), so as to provide all-round protection for the cable core (2).

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