Halogen-free low-smoke B1-level power cable for urban construction

Abstract

The utility model belongs to the technical field of cables, and particularly relates to a halogen-free low-smoke B-level power cable for urban construction, which comprises a guide core, an inner coating layer is arranged on the outer side of the guide core, an outer coating layer for bearing external acting force is arranged on the outer side of the inner coating layer, and a halogen-free low-smoke B-level power cable is arranged on the outer side of the outer coating layer. When the outer wrapping layer is damaged, the inner wrapping layer still keeps normal use performance, an inner partition layer used for isolating external abrasion is arranged on the outer side of the inner wrapping layer, and an outer partition layer used for blocking open fire is arranged on the outer side of the inner partition layer. The upper end and the lower end of the guide core are further provided with limiting strips used for connecting and fixing the adjacent inner partition layers and the outer partition layers. According to the utility model, when the external skin is damaged, the integrity of the internal structure can be maintained, and the flame-retardant insulation effect and the like are not influenced, so that the service life of the cable is prolonged, the maintenance cost can be greatly reduced, the cable can be applied to various installation environments, and the long-time stable use performance is provided.

Description

Technical Field

[0001] The utility model belongs to the technical field of cables, and particularly relates to a halogen-free and low-smoke B1-level power cable for urban construction. Background Art

[0002] Urban halogen-free low-smoke B1-level power cable is a power cable with low smoke, halogen-free, flame-retardant and other characteristics. Its flame retardant grade is B1. This cable produces less smoke when burning and does not contain halogen, which can reduce the harm to the environment and personnel; at the same time, the B1-level flame retardant performance means that the cable has a certain flame retardant ability when burning, which can slow down the spread of fire;

[0003] At present, the existing urban halogen-free low-smoke B1-level power cables will inevitably produce mobile mechanical wear with external mechanisms and the environment during laying and use, causing damage to the outer skin. In the subsequent use process, it is impossible to effectively slow down the open flame, resulting in a decrease in the flame retardant effect, which is not conducive to the stable use of the cable;

[0004] In order to solve the above problems, this application proposes a halogen-free low-smoke B1 class power cable for urban construction. Utility Model Content

[0005] The utility model aims to provide a halogen-free low-smoke B1-level power cable for urban construction, which solves the problems raised in the above-mentioned background technology.

[0006] In order to solve the above technical problems, the utility model is realized by the following technical solutions:

[0007] The utility model discloses a halogen-free low-smoke Class B power cable for urban construction, comprising a conductor core, an inner covering layer is arranged on the outer side of the inner covering layer, an outer covering layer for bearing external forces is arranged on the outer side of the inner covering layer, the inner covering layer still maintains normal performance when the outer covering layer is damaged, an inner partition layer for isolating external wear is arranged on the outer side of the inner covering layer, an outer partition layer for blocking open flames is arranged on the outer side of the inner partition layer, limiting strips for connecting and fixing adjacent inner and outer partition layers are also arranged at the upper and lower ends of the conductor core, a ring frame for limiting the inner and outer partition layers and the limiting strips to predetermined positions is arranged on the outer side of the transmission path of the conductor core, a positioning strip for enhancing the performance of resisting external forces is arranged on the outer side of the inner partition layer, and flame-retardant particles for improving flame-retardant performance are filled inside the positioning strips adjacent to the inner and outer partition layers, and the flame-retardant particles are also used to form a buffering decomposition for external forces.

[0008] Furthermore, the interior of the limiting strip is provided with a guide hole for infusing the flame retardant particles between adjacent positioning strips, and the upper end of the limiting strip is provided with a positioning hole for docking with an external filling device.

[0009] Furthermore, both sides of the limiting strip are provided with slots for snap-fitting the ends of the inner and outer partition layers, and the snap-fitting connection between the ends of the inner and outer partition layers and the slots is also used to form a seal.

[0010] Furthermore, clamping plates for clamping the limiting strip to fix the transmission direction are arranged inside the upper and lower ends of the ring frame.

[0011] Furthermore, a squeezing roller for squeezing the inner and outer layers to bend them is disposed inside one end of the ring frame, and the squeezing roller is also used to insert the ends of the inner and outer layers into the inside of the card slot.

[0012] Furthermore, positioning shafts connected to the ring frame are rotatably mounted at both ends of the squeezing roller.

[0013] Furthermore, the inner partition layer and the outer partition layer are assembled with the limiting strips in sequence.

[0014] The utility model has the following beneficial effects:

[0015] The utility model sets the insulation layer of the cable as a layered combination structure of an inner coating layer and an outer coating layer, and uses the inner and outer layers to separate them, so that the outer coating layer can withstand external wear and tear while the inner layer maintains insulation and flame retardancy. Compared with the existing cables, the cable can still maintain stable flame retardancy and insulation properties when the outer skin is damaged, thereby ensuring the stability of the cable and reducing the impact of the external environment to increase its service life.

[0016] The utility model can combine the inner partition layer, the outer partition layer and the limit strip into one body through the ring frame when transmitting the guide core after the winding mechanism is installed on the cable production line to store the inner partition layer and the outer partition layer, and cover the outer side of the guide core; then, during the extrusion operation, the guide core, the inner partition layer, the outer partition layer and the limit strip are covered to form the inner covering layer and the outer covering layer. After this arrangement, the cable production efficiency can be guaranteed, and the structure thereof can be optimized so that the cable can adapt to different installation environments and improve the adaptability.

[0017] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

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

[0020] Figure 2 It is a schematic diagram of the internal structure of one end of the cable of the utility model;

[0021] Figure 3 It is a schematic diagram of the internal cross section of the cable of the utility model and its partially enlarged structure;

[0022] Figure 4 It is a schematic diagram of the exploded structure of the outer partition and the inner partition of the utility model;

[0023] Figure 5 It is a partial enlarged structural schematic diagram of part A of the utility model;

[0024] Figure 6 It is a schematic diagram of the structure of the connection part between the outer partition and the ring frame of the utility model;

[0025] Figure 7 It is a partial enlarged structural schematic diagram of part B of the utility model;

[0026] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0027] In the figure: 1. core guide; 2. inner coating layer; 3. outer coating layer; 4. inner partition layer; 5. outer partition layer; 6. limit strip; 7. ring frame; 8. positioning strip; 9. flame retardant particles; 10. guide hole; 11. positioning hole; 12. slot; 13. clamping plate; 14. extrusion roller; 15. positioning shaft. DETAILED DESCRIPTION

[0028] 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 of 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.

[0029] In the description of the present invention, it should be understood that terms such as "opening", "upper", "lower", "thickness", "top", "middle", "length", "inside", "all around" and the like indicating orientation or positional relationship are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0030] See also Figure 1-7As shown, the utility model is a halogen-free low-smoke B1-level power cable for urban construction, comprising a core conductor 1, an inner coating layer 2 is arranged on the outer side of the core conductor 1, an outer coating layer 3 for bearing external forces is arranged on the outer side of the inner coating layer 2, the inner coating layer 2 still maintains normal performance when the outer coating layer 3 is damaged, an inner barrier layer 4 for isolating external wear is arranged on the outer side of the inner coating layer 2, an outer barrier layer 5 for blocking open flames is arranged on the outer side of the inner barrier layer 4, and the upper and lower ends of the core conductor 1 are also provided with a cable for connecting adjacent inner barrier layers 4 and outer barrier layers 5. A limit strip 6 is connected and fixed, and a ring frame 7 is arranged on the outside of the transmission path of the guide core 1 for limiting the inner partition layer 4, the outer partition layer 5 and the limit strip 6 to a predetermined position. A positioning strip 8 is arranged on the outside of the inner partition layer 4 for enhancing the resistance to external force. The positioning strips 8 adjacent to the inner partition layer 4 and the outer partition layer 5 are filled with flame retardant particles 9 for improving the flame retardant performance. The flame retardant particles 9 are also used to form a buffering decomposition of external forces. In this embodiment, the outer partition layer 5 is also used for the positioner to cut off the depth to prevent damage to the internal structure when the outer coating layer 3 is damaged for cutting off and repair.

[0031] Among them, the interior of the limiting strip 6 is provided with a guide hole 10 for infusing the flame retardant particles 9 between adjacent positioning strips 8, and the upper end of the limiting strip 6 is provided with a positioning hole 11 for docking with external filling equipment. In this embodiment, the guide hole 10 corresponds to the cavity between adjacent positioning strips 8.

[0032] Among them, both sides of the limiting strip 6 are provided with card grooves 12 for snap-fitting connection of the ends of the inner partition layer 4 and the outer partition layer 5. The snap-fit ​​connection between the ends of the inner partition layer 4 and the outer partition layer 5 and the card grooves 12 is also used to form a seal. The seal in this embodiment is used to limit the flame retardant particles 9 to be scattered in a certain space.

[0033] Wherein, clamping plates 13 for clamping the limiting strip 6 to fix the transmission direction are arranged inside the upper and lower ends of the ring frame 7. In this embodiment, an inclined slope structure for guiding is arranged on the outer side of the lower end of the clamping plate 13.

[0034] Among them, an extrusion roller 14 for extruding the inner partition 4 and the outer partition 5 to make them bend is arranged inside one end of the ring frame 7, and the extrusion roller 14 is also used to insert the ends of the inner partition 4 and the outer partition 5 into the interior of the card slot 12 in this embodiment.

[0035] Wherein, positioning shafts 15 connected to the ring frame 7 are rotatably mounted at both ends of the squeezing roller 14 . In this embodiment, the other end of the positioning shaft 15 is rotatably connected to the clamping plate 13 .

[0036] The inner partition layer 4 and the outer partition layer 5 are assembled with the limiting strip 6 in sequence.

[0037] It can be understood that the utility model can maintain the integrity of the internal structure when the external skin is damaged, without having to worry about affecting the flame retardant insulation and other effects, thereby extending the service life of the cable while greatly reducing maintenance costs. It can be applied to a variety of installation environments and provide long-term stable performance.

[0038] An operation flow of the present embodiment is specifically applied as follows: first, the inner partition layer 4 and the outer partition layer 5 stored on both sides of the cable production line are sequentially released, so that they are sequentially combined with the limit strips 6 in front and back. At this time, the two ends of the inner partition layer 4 and the outer partition layer 5 are squeezed by the squeezing roller 14 to form a bend and are engaged with the inside of the card slot 12 to form a connection. Subsequently, during the transmission process, a filling device can be installed externally. Through the cooperation of the positioning hole 11 and the guide hole 10, the flame retardant particles 9 can be fixedly filled between the inner partition layer 4 and the outer partition layer 5 and the adjacent positioning strips 8 to fill the cavity. The rear inner partition layer 4, the outer partition layer 5 and the limit strip 6 are extruded together with the guide core 1 to form a layered inner coating layer 2 and an outer coating layer 3 on the outside of the guide core 1. At this time, the cable can withstand extrusion, pulling, friction and other forces through the external outer coating layer 3, while the internal part maintains intact flame retardant and insulation properties. At the same time, the flame retardant effect can be increased through the flame retardant particles 9, and when subjected to external forces, they shift against each other to decompose the external forces, thereby improving the external force resistance performance of the cable. Based on this, the long-term stable performance of the cable can be effectively guaranteed, thereby improving practicality.

[0039] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0040] The preferred embodiments of the utility model disclosed above are only used to help explain the utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the utility model to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the utility model, so that technicians in the relevant technical field can well understand and use the utility model. The utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A halogen-free low-smoke B1-level power cable for urban construction, comprising a conductor core (1), characterized in that: The outer side of the guide core (1) is provided with an inner coating layer (2), the outer side of the inner coating layer (2) is provided with an outer coating layer (3) for bearing external forces, when the outer coating layer (3) is damaged, the inner coating layer (2) still maintains normal performance, the outer side of the inner coating layer (2) is provided with an inner barrier layer (4) for isolating external wear, the outer side of the inner barrier layer (4) is provided with an outer barrier layer (5) for blocking open flames, and the upper and lower ends of the guide core (1) are also provided with adjacent inner barrier layers (4) and The outer partition layer (5) is connected to a fixed limiting strip (6); a ring frame (7) is provided on the outer side of the transmission path of the guide core (1) for limiting the inner partition layer (4), the outer partition layer (5) and the limiting strip (6) to a predetermined position; a positioning strip (8) is provided on the outer side of the inner partition layer (4) for enhancing the resistance to external forces; the positioning strips (8) adjacent to the inner partition layer (4) and the outer partition layer (5) are filled with flame retardant particles (9) for improving the flame retardant performance; the flame retardant particles (9) are also used to form a buffering decomposition against external forces.

2. The halogen-free low-smoke B1-level power cable for urban construction according to claim 1, characterized in that: The interior of the limiting strip (6) is provided with a guide hole (10) for injecting the flame retardant particles (9) between adjacent positioning strips (8), and the upper end of the limiting strip (6) is provided with a positioning hole (11) for docking with an external filling device.

3. The halogen-free low-smoke B1-level power cable for urban construction according to claim 1, characterized in that: The two sides of the limit strip (6) are provided with slots (12) for snap-fitting the ends of the inner partition (4) and the outer partition (5); the snap-fitting connection between the ends of the inner partition (4) and the outer partition (5) and the slots (12) is also used to form a seal.

4. The halogen-free low-smoke B1-level power cable for urban construction according to claim 1, characterized in that: Clamping plates (13) for clamping the limiting strip (6) to fix the transmission direction are arranged inside the upper and lower ends of the ring frame (7).

5. The halogen-free low-smoke B1-level power cable for urban construction according to claim 1, characterized in that: An extrusion roller (14) for extruding the inner interlayer (4) and the outer interlayer (5) to make them bend is arranged inside one end of the ring frame (7); the extrusion roller (14) is also used to insert the ends of the inner interlayer (4) and the outer interlayer (5) into the interior of the card slot (12).

6. The halogen-free low-smoke B1-level power cable for urban construction according to claim 5, characterized in that: Positioning shafts (15) connected to the ring frame (7) are rotatably mounted at both ends of the squeezing roller (14).

7. The halogen-free low-smoke B1-level power cable for urban construction according to claim 1, characterized in that: The inner partition layer (4) and the outer partition layer (5) are assembled with the limiting strip (6) in sequence.

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