Flexible fireproof flame-retardant cable

Abstract

The utility model discloses a flexible fireproof flame-retardant cable, which comprises a cable core, cable joints are assembled at two end parts of the cable core, and protection assemblies are assembled outside the cable joints; the outermost side of the cable core is provided with an outer protective layer, the inner side of the outer protective layer is provided with a reinforcing layer, and the inner side of the reinforcing layer is provided with an inner protective layer; three insulating layers are arranged on the inner side of the inner sheath, and three cable cores are respectively wrapped in the three insulating layers; the protection assembly comprises a left arc-shaped protection plate and a right arc-shaped protection plate which sleeve the two sides of the end part of the cable core; the upper end of the exterior of the cable connector is sleeved with a limiting sleeve, outer supporting rods are installed on the middle sections of the side walls of the left arc-shaped protection plate and the right arc-shaped protection plate, and sliding blocks are installed at the upper ends of the two outer supporting rods. According to the flexible fire-resistant flame-retardant cable, the two arcs are connected with the data connector through the arrangement of the inner supporting rod and the outer supporting rod, so that the connecting position of the two sections of cables can be limited and fixed, the connecting position is prevented from being bent, and breakage caused by long-time use is prevented.

Description

Technical Field

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

[0002] Wire and cable have developed from simple power transmission to multi-functionalization, that is, some new characteristics have been added according to different uses, such as: flame-retardant cable, flexible fire-resistant cable, low-halogen and low-smoke cable, etc.

[0003] The flexible fire-resistant and flame-retardant cables in the prior art are widely used because the cables on the main road also have very high performance requirements, especially the tensile strength and the ability of fire resistance and high temperature resistance. However, there are still some deficiencies. For example, when two sections of cables are connected through a cable joint, the protection at the connection is insufficient, and it is very easy to bend. After long-term use, it will break. After the break, it will cause the cable outer skin to contact and generate high temperature, resulting in fire at the connection. Therefore, the prior art needs to be improved. Content of the Utility Model

[0004] The purpose of the utility model is to provide a flexible fire-resistant and flame-retardant cable to solve the problems raised in the above background technique.

[0005] To achieve the above purpose, the utility model provides the following technical solution: A flexible fire-resistant and flame-retardant cable, including a cable core, both ends of the cable core are equipped with cable joints, and a protection component is assembled outside the cable joints;

[0006] The outermost side of the cable core is equipped with an outer protective layer, a strengthening layer is arranged inside the outer protective layer, and an inner protective layer is arranged inside the strengthening layer;

[0007] Three insulating layers are arranged inside the inner protective layer, and three cable cores are respectively wrapped inside the three insulating layers;

[0008] The protection component includes a left arc-shaped guard plate and a right arc-shaped guard plate sleeved on both sides of the end of the cable core;

[0009] A limiting sleeve is sleeved on the upper end of the outside of the cable joint. Outer support rods are installed in the middle sections of the side walls of the left arc-shaped guard plate and the right arc-shaped guard plate, and sliders are installed at the upper ends of the two outer support rods;

[0010] Load-bearing blocks are installed on the left and right side walls of the limiting sleeve, and a support component is assembled between the slider and the load-bearing block.

[0011] Preferably, the support component includes a support body, a spring and a support plate. The spring is installed between the support body and the support plate. The support body is connected to the slider, and the support plate is connected to the load-bearing block.

[0012] Preferably, balance rods are installed on both sides of the spring on the side wall of the support plate. Balance cavities are provided at both ends of the side wall of the support body. The balance rods are inserted into the balance cavities, and balance plates are installed at the ends of the balance rods, and the balance plates are arranged in the balance cavities.

[0013] Preferably, inner support rods are installed on the inner walls of the two outer support rods. L-shaped corner guards are installed at the upper ends of the two inner support rods, and the L-shaped corner guards are in fitting connection with the side wall of the cable joint.

[0014] Preferably, a clamping block is installed on the inner side wall of the left arc-shaped guard plate, and a clamping groove is installed on the inner side wall of the right arc-shaped guard plate, and the clamping block and the clamping groove cooperate with each other.

[0015] Preferably, rubber cushion layers are installed on the upper surfaces of the two bearing blocks, and rubber strips are uniformly installed on the outer wall of the cable joint.

[0016] Preferably, the outer protective layer is sequentially provided with an outer sheath, a moisture-proof layer and a flame-retardant layer from outside to inside, and the inner side of the flame-retardant layer is in contact with the outer layer of the strengthening layer.

[0017] Preferably, an insulating filling layer is provided between the three insulating layers and the inner protective layer.

[0018] Compared with the prior art, the beneficial effects of the present utility model are as follows: for this flexible fire-resistant and flame-retardant cable, a strengthening layer is arranged on the inner side of the outer protective layer, an inner protective layer is arranged on the inner side of the strengthening layer, and three insulating layers are arranged on the inner side of the inner protective layer, which can achieve good flame-retardant and fire-resistant properties and tensile flexibility. At the connection of the cable, a protection component is arranged. By arranging the inner and outer support rods, the two arc-shaped parts are connected to the data joint, so that the connection of the two sections of the cable can be limited and fixed, avoiding bending at the connection. Thus, through the cooperation between the fire-resistant and flame-retardant cable and the protection component at the connection, it is possible to prevent breakage during long-term use and avoid unnecessary troubles. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic structural diagram of the present utility model;

[0020] Figure 2 is a cross-sectional view of the present utility model;

[0021] Figure 3 is a schematic diagram of the protection component of the present utility model;

[0022] Figure 4 is a cross-sectional view of the outer protective layer of the present utility model;

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

[0024] Figure 6 Schematic diagram of the support assembly of the present utility model

[0025] In the figure: 1 cable core, 2 cable joint, 3 protection assembly, 4 limit sleeve, 5 left arc-shaped guard plate, 6 right arc-shaped guard plate, 7 outer support rod, 8 inner support rod, 9 L-shaped corner guard, 10 rubber strip, 12 fixture block, 13 fixture groove, 14 bearing block, 15 rubber cushion layer, 16 slider, 17 support assembly, 171 support body, 172 spring, 173 support plate, 18 balance rod, 19 balance plate, 20 balance cavity, 21 outer protective layer, 211 outer sheath, 212 moisture-proof layer, 213 flame-retardant layer, 22 strengthening layer, 23 inner protective layer, 24 insulation filling layer, 25 insulation layer Specific implementation manner

[0026] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present utility model

[0027] Please refer to Figures 1 to 6 , the present utility model provides a technical solution: a flexible fire-resistant and flame-retardant cable, including a cable core 1, both ends of the cable core 1 are equipped with cable joints 2, the outside of the cable joint 2 is equipped with a protection assembly 3, the two sections of cables are connected through the cable joint 2, and the cable joint 2 is a circuit joint in the prior art, with the model of NPT3 / 4;

[0028] The outermost side of the cable core 1 is equipped with an outer protective layer 21, an inner strengthening layer 22 is arranged inside the outer protective layer 21, and an inner protective layer 23 is arranged inside the strengthening layer 22;

[0029] Three insulation layers 25 are arranged inside the inner protective layer 23, and the three cable cores 1 are respectively wrapped inside the three insulation layers 25;

[0030] The inner protective layer 23 is sequentially provided with a heat insulation layer and a mica tape layer from outside to inside. The inside of the mica tape layer is in contact with the outside of the insulation filling layer, and the outside of the heat insulation layer is in contact with the inside of the strengthening layer.

[0031] The insulation layer 25 includes an insulation wrapping layer and a shielding wrapping layer from outside to inside. By the combined use of the insulation wrapping layer and the shielding wrapping layer, while the insulation layer has insulation performance, it can also isolate interference;

[0032] The protection assembly 3 includes a left arc-shaped guard plate 5 and a right arc-shaped guard plate 6 sleeved on both sides of the end of the cable core 1;

[0033] A limiting sleeve 4 is sleeved on the upper end of the outer part of the cable joint 2. Outer support rods 7 are installed in the middle sections of the side walls of the left arc-shaped guard plate 5 and the right arc-shaped guard plate 6. Sliders 16 are installed at the upper ends of the two outer support rods 7. The two arc-shaped guard plates can be sleeved on the outside of the cable core 1, and the slider 16 can tightly fit the side wall of the cable joint 2 and move up and down.

[0034] Carrying blocks 14 are installed on the left and right side walls of the limiting sleeve 4. A support assembly 17 is assembled between the slider 16 and the carrying block 14. The support assembly 17 pushes the carrying block 14, thereby driving the limiting sleeve 4 to move outside the cable joint 2, enabling the carrying block 14 to fit with external equipment and making the assembly at the joint more stable.

[0035] The support assembly 17 includes a support body 171, a spring 172, and a support plate 173. The spring 172 is installed between the support body 171 and the support plate 173. The support body 171 is connected to the slider 16, and the support plate 173 is connected to the carrying block 14.

[0036] Balancing rods 18 are installed on both sides of the spring 172 on the side wall of the support plate 173. Balancing cavities 20 are opened at both ends of the side wall of the support body 171. The balancing rods 18 are inserted into the balancing cavities 20, and a balancing plate 19 is installed at the end of the balancing rod 18, and the balancing plate 19 is arranged in the balancing cavity 20.

[0037] Inner support rods 8 are installed on the inner walls of the two outer support rods 7. L-shaped corner guards 9 are installed at the upper ends of the two inner support rods 8. The L-shaped corner guards 9 are in fitting connection with the side wall of the cable joint 2.

[0038] A clamping block 12 is installed on the inner side wall of the left arc-shaped guard plate 5, and a clamping groove 13 is installed on the inner side wall of the right arc-shaped guard plate 6. The clamping block 12 and the clamping groove 13 cooperate with each other.

[0039] Rubber cushion layers 15 are installed on the upper surfaces of the two carrying blocks 14. Rubber strips 10 are evenly installed on the outer wall of the cable joint 2. The rubber cushion layer 15 can make the surface of the carrying block 14 softer, more stable when fitting with external equipment, and reduce wear at the same time.

[0040] The outer protective layer 21 is sequentially provided with an outer sheath 211, a moisture-proof layer 212, and a flame-retardant layer 213 from outside to inside. The inner side of the flame-retardant layer 213 is in contact with the outer layer of the strengthening layer 22. Through the combined use of the outer sheath 211, the moisture-proof layer 212, and the flame-retardant layer 213, the flame-retardant and moisture-proof effects of the outer protective layer 21 are better.

[0041] An insulating filling layer 24 is provided between the three insulating layers 25 and the inner protective layer 23.

[0042] Working process and principle: When in use, when it is necessary to connect the two ends of the cable, first install cable connectors 2 at both ends of the cable core 1, sleeve the left arc-shaped guard plate 5 and the right arc-shaped guard plate 6 on both sides close to the cable connectors 2, and fix the two. Then, sleeve the limit sleeve 10 outside the cable connector 2, then fit the slider 16 to the outer wall of the cable connector 2, and fit the L-shaped corner guard 9 to the two corners of the cable connector 2 to complete the installation.

[0043] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above exemplary embodiments, and without departing from the spirit or basic characteristics of the present utility model, the present utility model can be implemented in other specific forms. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present utility model. Any reference signs in the claims should not be regarded as limiting the claimed rights.

[0044] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A flexible fire-resistant and flame-retardant cable, comprising a cable core (1), characterized in that: Both ends of the cable core (1) are equipped with cable connectors (2), and the outside of the cable connector (2) is equipped with a protective component (3); The outermost side of the cable core (1) is provided with an outer sheath (21), the inner side of the outer sheath (21) is provided with a reinforcement layer (22), and the inner side of the reinforcement layer (22) is provided with an inner sheath (23); Three insulating layers (25) are arranged on the inner side of the inner protective layer (23), and three cable cores (1) are respectively wrapped inside the three insulating layers (25); The protection component (3) comprises a left arc-shaped protection plate (5) and a right arc-shaped protection plate (6) which are sleeved on both sides of the end of the cable core (1); The outer upper end of the cable connector (2) is sleeved with a limit sleeve (4), the middle sections of the side walls of the left arc-shaped guard plate (5) and the right arc-shaped guard plate (6) are both equipped with external support rods (7), and the upper ends of the two external support rods (7) are both equipped with sliders (16); The left and right side walls of the limiting sleeve (4) are both provided with bearing blocks (14), and a supporting assembly (17) is installed between the sliding block (16) and the bearing block (14).

2. A flexible fire-resistant and flame-retardant cable according to claim 1, characterized in that: The support assembly (17) comprises a support body (171), a spring (172) and a support plate (173); the spring (172) is installed between the support body (171) and the support plate (173); the support body (171) is connected to the slider (16); and the support plate (173) is connected to the bearing block (14).

3. A flexible fire-resistant and flame-retardant cable according to claim 2, characterized in that: The side walls of the support plate (173) are provided with balance rods (18) on both sides of the spring (172), and the two ends of the side walls of the support body (171) are provided with balance cavities (20), the balance rod (18) is inserted into the balance cavity (20), and the end of the balance rod (18) is provided with a balance plate (19), and the balance plate (19) is arranged in the balance cavity (20).

4. A flexible fire-resistant and flame-retardant cable according to claim 1, characterized in that: The inner walls of the two outer support rods (7) are both installed with inner support rods (8), and the upper ends of the two inner support rods (8) are both installed with L-shaped corner guards (9), and the L-shaped corner guards (9) are closely connected to the side walls of the cable connector (2).

5. A flexible fire-resistant and flame-retardant cable according to claim 1, characterized in that: A clamping block (12) is installed on the inner side wall of the left arc-shaped guard plate (5), and a clamping slot (13) is installed on the inner side wall of the right arc-shaped guard plate (6), and the clamping block (12) and the clamping slot (13) are matched with each other.

6. A flexible fire-resistant and flame-retardant cable according to claim 1, characterized in that: The upper surfaces of the two bearing blocks (14) are both installed with rubber cushion layers (15), and the outer wall of the cable connector (2) is evenly installed with rubber strips (10).

7. A flexible fire-resistant and flame-retardant cable according to claim 1, characterized in that: The outer protective layer (21) is provided with an outer sheath (211), a moisture-proof layer (212) and a flame-retardant layer (213) in sequence from the outside to the inside, and the inner side of the flame-retardant layer (213) is in contact with the outer layer of the reinforcement layer (22).

8. A flexible fire-resistant and flame-retardant cable according to claim 1, characterized in that: The three insulating layers (25) and the inner protective layer (23) are provided with an insulating filling layer (24).

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