Tensile flame-retardant fireproof power cable

Abstract

The utility model relates to the technical field of power cables, and discloses a tensile flame-retardant fireproof power cable, which comprises a first cable body and a second cable body, the surface of the first cable body is sleeved with a fixed sleeve, the right side of the fixed sleeve is rotatably connected with a movable sleeve, the surface of the movable sleeve is provided with a convex plate, and the convex plate is rotatably connected with the fixed sleeve. The surface of the second cable body is sleeved with a connecting sleeve which is in threaded connection with the surface of the external thread through a convex plate, the first cable body further comprises a guide core, an insulating layer, a second flame-retardant layer, a tensile layer, a first flame-retardant layer and an outer sheath, the insulating layer surrounds the outer surface of the guide core, and the second flame-retardant layer is arranged on the other side of the insulating layer; according to the utility model, the movable sleeve can be screwed into the connecting sleeve, so that the movable sleeve and the connecting sleeve are fixed, the stability of the first cable body and the second cable body after connection is improved, and the phenomenon of fracture after random pulling is prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of power cables, in particular to a tensile flame-retardant and fire-resistant power cable. Background Art

[0002] Power cables are cables used to transmit and distribute electric energy. They are commonly used in urban underground power grids, power station lead-out lines, internal power supply for industrial and mining enterprises, and underwater transmission lines across rivers and seas. In power lines, the proportion of cables is gradually increasing. Power cables are cable products used to transmit and distribute high-power electric energy in the trunk lines of power systems, including 1-500KV and above various voltage levels, various insulated power cables, which can be divided into medium and low voltage power cables, high voltage cables, extra-high voltage cables, and ultra-high voltage cables according to voltage levels. In addition, they can also be divided into AC cables and DC cables according to current systems.

[0003] After searching, it is found that a tensile-resistant fire-resistant and flame-retardant power cable is disclosed in a Chinese patent document [Announcement No.: CN213339803U]. This tensile-resistant fire-resistant and flame-retardant power cable includes a first cable line, a first protective plate is movably connected to the upper surface of the first cable line, a first hinge is fixedly connected to one side of the first protective plate, a second protective plate is fixedly installed at the bottom of the first hinge, and a first screw is threadedly connected to the top of the second protective plate.

[0004] Although the power cable disclosed in this patent can protect the connection between the first cable and the second cable through the cooperation between the first buckle and the second buckle, there will still be a gap at the connection between them, resulting in external fire sources passing through the gap between them and still causing damage to the cable during subsequent use. Utility Model Content

[0005] The utility model aims to provide a tensile flame-retardant and fire-resistant power cable to solve the problems existing in the above-mentioned background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a tensile-resistant, flame-retardant and fire-resistant power cable, comprising a first cable body and a second cable body, the surface of the first cable body is sleeved with a fixed sleeve, the right side of the fixed sleeve is rotatably connected to a movable sleeve, the surface of the movable sleeve is provided with a convex plate, the surface of the second cable body is sleeved with a connecting sleeve threadedly connected to the surface of the external thread through the convex plate, the first cable body also includes a guide core, an insulating layer, a second flame-retardant layer, a tensile-resistant layer, a first flame-retardant layer and an outer sheath, the insulating layer surrounds the outer surface of the guide core, the second flame-retardant layer is arranged on the other side of the insulating layer, the tensile-resistant layer is arranged on the side of the second flame-retardant layer away from the insulating layer, the first flame-retardant layer is arranged on the outside of the tensile-resistant layer, and the outer sheath is arranged on the outermost side of the first flame-retardant layer.

[0007] Preferably, a reinforcing wire is arranged inside the first cable body, and the reinforcing wire is located between the tensile layer and the first flame retardant layer.

[0008] Preferably, the left and right sides of the front and rear sides of the fixing sleeve and the connecting sleeve are both threadedly connected with fixing bolts for fastening the fixing sleeve and the connecting sleeve respectively.

[0009] Preferably, a support plate is fixed inside the insulating layer, and the guide core is symmetrically arranged inside the support plate.

[0010] Preferably, a plurality of wear-resistant ridges are arranged around the outer side of the outer sheath, and the wear-resistant ridges are made of rubber.

[0011] Preferably, a plurality of convex plates are fixed around the surface of the movable sleeve, and the convex plates are arranged and distributed at equal distances.

[0012] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0013] The utility model realizes a rotational connection between the movable sleeve and the fixed sleeve. After the fixed sleeve is arranged on the surface of the first cable body, the movable sleeve can be screwed into the interior of the connecting sleeve, so as to fix the movable sleeve and the connecting sleeve, thereby improving the stability of the first cable body and the second cable body after being connected, and preventing the phenomenon of breakage due to random pulling. At the same time, through the arrangement of the first flame retardant layer and the second flame retardant layer, when the first cable body encounters a fire source, the outer first flame retardant layer plays a role first, effectively preventing the spread of flames. Even if the first flame retardant layer is damaged to a certain extent, the inner second flame retardant layer can continue to play a role, ensuring that the first cable body will not burn quickly, thereby delaying the expansion of the fire. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the three-dimensional structure of China in the utility model;

[0015] Figure 2 It is a schematic diagram of the structure after three-dimensional separation in the utility model;

[0016] Figure 3 It is a schematic diagram of the cross-sectional structure of the cable in the utility model;

[0017] Figure 4 For this utility model Figure 3 A partial enlarged view of point A in the middle.

[0018] In the figure: 1. first cable body; 101. core guide; 102. insulation layer; 103. second flame retardant layer; 104. tensile layer; 105. first flame retardant layer; 106. outer sheath; 2. second cable body; 3. fixing sleeve; 4. movable sleeve; 5. external thread; 6. connecting sleeve; 7. fixing bolt; 8. convex plate; 9. supporting plate; 10. reinforcing wire; 11. wear-resistant ridge. DETAILED DESCRIPTION

[0019] 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.

[0020] See also Figure 1-4 As shown, a tensile flame-retardant and fire-resistant power cable comprises a first cable body 1 and a second cable body 2, a fixed sleeve 3 is sleeved on the surface of the first cable body 1, a movable sleeve 4 is rotatably connected to the right side of the fixed sleeve 3, a convex plate 8 is provided on the surface of the movable sleeve 4, a connecting sleeve 6 is sleeved on the surface of the second cable body 2 and is threadedly connected to the surface of the external thread 5 through the convex plate 8, the first cable body 1 also comprises a guide core 101, an insulating layer 102, a second flame-retardant layer 103, a tensile layer 104, a first flame-retardant layer 105 and an outer sheath 106, the insulating layer 102 surrounds the outer surface of the guide core 101, the second flame-retardant layer 103 is arranged on the other side of the insulating layer 102, the tensile layer 104 is arranged on the side of the second flame-retardant layer 103 away from the insulating layer 102, the first flame-retardant layer 105 is arranged on the outer side of the tensile layer 104, and the outer sheath 106 is arranged on the outermost side of the first flame-retardant layer 105.

[0021] A reinforcing wire 10 is disposed inside the first cable body 1 and is located between the tensile layer 104 and the first flame retardant layer 105 , so that the bending resistance of the first cable body 1 can be increased, thereby extending its subsequent service life.

[0022] The left and right sides of the front and rear sides of the fixing sleeve 3 and the connecting sleeve 6 are threadedly connected with fixing bolts 7 for fastening the fixing sleeve 3 and the connecting sleeve 6 respectively, so as to increase the fixing effect between the fixing sleeve 3 and the first cable body 1, and the connecting sleeve 6 and the second cable body 2, and prevent arbitrary movement.

[0023] A support plate 9 is fixed inside the insulating layer 102 , and the guide cores 101 are symmetrically arranged inside the support plate 9 , so as to provide auxiliary support for the guide cores 101 and prevent collision and extrusion between the guide cores 101 to affect subsequent use.

[0024] A plurality of wear-resistant ridges 11 are disposed around the outer side of the outer sheath 106 , and the wear-resistant ridges 11 are made of rubber material, which can increase the wear resistance of the first cable body 1 and prevent cracking.

[0025] A plurality of convex plates 8 are fixed around the surface of the movable sleeve 4 , and the convex plates 8 are arranged and distributed at equal distances, so as to increase the friction with the user's hand and facilitate better application of force to rotate the movable sleeve 4 .

[0026] It is worth noting that: the technical features proposed in this technical solution should be regarded as prior art, and the specific structure, working principle, and possible control method and spatial layout method of these technical features can be selected by conventional methods in the field, and this technical solution will not be further elaborated.

[0027] Working principle: When in use, the fixing sleeve 3 can be sleeved on the surface of one end of the first cable body 1, and then the connecting sleeve 6 can be sleeved on the surface of one end of the second cable body 2 to be connected. After the connection between the first cable body 1 and the second cable body 2 is completed, one end of the movable sleeve 4 can be aligned with the inside of the connecting sleeve 6, and the movable sleeve 4 can be rotated to fix the connecting sleeves 6. Then, the fixing bolt 7 is rotated and the fixing sleeve 3 is fixed on the surface of the first cable body 1, and the connecting sleeve 6 is fixed on the surface of the second cable body 2. In the subsequent use process, when the first cable body 1 encounters a fire source, the outer first flame retardant layer 105 will first play a role to effectively prevent the spread of flames. Even if the first flame retardant layer 105 is damaged to a certain extent, the inner second flame retardant layer 103 can continue to play a role to ensure that the first cable body 1 will not burn quickly, thereby delaying the expansion of the fire. At the same time, through the setting of the tensile layer 104, the tensile performance of the first cable body 1 can be improved, thereby extending its service life.

[0028] 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. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0029] 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 tensile flame retardant and fire resistant power cable, comprising a first cable body (1) and a second cable body (2), characterized in that: The surface of the first cable body (1) is sleeved with a fixed sleeve (3), the right side of the fixed sleeve (3) is rotatably connected to a movable sleeve (4), the surface of the movable sleeve (4) is provided with a convex plate (8), the surface of the second cable body (2) is sleeved with a connecting sleeve (6) which is threadedly connected to the surface of the external thread (5) through the convex plate (8), the first cable body (1) also includes a guide core (101), an insulating layer (102), a second flame retardant layer (103), a tensile layer (104), a first A flame retardant layer (105) and an outer sheath (106), wherein the insulating layer (102) surrounds the outer surface of the conductor core (101), the second flame retardant layer (103) is arranged on the other side of the insulating layer (102), the tensile layer (104) is arranged on the side of the second flame retardant layer (103) away from the insulating layer (102), the first flame retardant layer (105) is arranged on the outer side of the tensile layer (104), and the outer sheath (106) is arranged on the outermost side of the first flame retardant layer (105).

2. A tensile flame retardant and fire resistant power cable according to claim 1, characterized in that: A reinforcing wire (10) is arranged inside the first cable body (1), and the reinforcing wire (10) is located between the tensile layer (104) and the first flame retardant layer (105).

3. A tensile flame retardant and fire resistant power cable according to claim 1, characterized in that: The left and right sides of both the front and rear sides of the fixing sleeve (3) and the connecting sleeve (6) are threadedly connected with fixing bolts (7) for respectively fastening the fixing sleeve (3) and the connecting sleeve (6).

4. The tensile flame retardant and fire resistant power cable according to claim 1, characterized in that: A support plate (9) is fixed inside the insulating layer (102), and the guide core (101) is symmetrically arranged inside the support plate (9).

5. The tensile flame retardant and fire resistant power cable according to claim 1, characterized in that: A plurality of wear-resistant ridges (11) are arranged around the outer side of the outer sheath (106), and the wear-resistant ridges (11) are made of rubber.

6. A tensile flame retardant and fire resistant power cable according to claim 1, characterized in that: A plurality of convex plates (8) are fixed around the surface of the movable sleeve (4), and the convex plates (8) are arranged and distributed at equal distances.

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