High-temperature-resistant special cable with good waterproof effect

Abstract

The utility model belongs to the technical field of special cables, and particularly relates to a high-temperature-resistant special cable with a good waterproof effect, which comprises a cable inner core, an insulating layer is coated on the outer surface of the cable inner core, and a high-temperature-resistant protective layer is coated outside the insulating layer. According to the high-temperature-resistant special cable with the good waterproof effect, the cable inner cores are separated through the separation rings, the situation that in the pay-off installation process, the cable inner cores in the cable are mutually wound and extruded due to friction, and consequently an insulating layer is damaged is avoided, and the separation rings can be arranged in a fixed-length mode so that the use length of the cable can be judged; the outer wall of the waterproof layer is a waterproof outer layer made of a polyethylene material, the inner wall of the waterproof layer is a comprehensive protection layer made of a composite material made of aluminum plastic and lead, and the two layers cooperate to better resist water, and guide water drops to gather at the bottom of the flow guide rod and guide the water drops to drop, so that the water drops are prevented from being hung at the bottom of the waterproof layer for a long time; and water infiltration is caused.

Description

Technical Field

[0001] The utility model relates to the technical field of special cables, in particular to a high-temperature resistant special cable with good waterproof effect. Background Art

[0002] A cable is a wire that transmits electricity or information from one place to another, made of one or more mutually insulated conductors and an outer insulating protective layer. It is usually a rope-like cable made of several or several groups of conductors (at least two in each group). Each group of conductors is insulated from each other and often twisted around a center. The entire outer layer is covered with a highly insulating covering. In some special places, during the laying of cables, due to the high ambient temperature, the existing ordinary cables cannot meet the high temperature resistance requirements, and the existing ordinary cables have a low waterproof grade and cannot meet the requirements for use in certain special environments.

[0003] As disclosed in Chinese patent announcement No. CN216212485U, a high-temperature resistant special cable with good waterproof effect is disclosed. When in use, the load strength of the special cable can be improved through multiple groups of cable conductors, the polytetrafluoroethylene used in the first insulating layer and the second insulating layer can greatly improve the insulation of the special cable, the fire-resistant fiber cotton used in the first high-temperature resistant layer and the second high-temperature resistant layer has excellent thermal stability, so that the special cable has good high-temperature resistance, the metal aluminum used in the metal layer can increase the thermal conductivity of the special cable to prevent local excessive heat, the strength of the special cable is increased by the metal layer, and the tensile strength of the special cable is increased. The rubber material used in the waterproof layer can improve the waterproof performance of the special cable, the polyethylene material used in the wear-resistant layer can increase the service life of the special cable, and the cable coding set on the surface of the wear-resistant layer can prevent the cable from being stolen, thereby solving the problem of low high-temperature resistance and waterproof performance of existing ordinary cables.

[0004] However, the high-temperature resistant special cable with good waterproof effect in the above application has certain limitations due to the friction of the cable when the cable is stretched for installation, which may cause the wires inside the cable to be entangled, rubbed and squeezed with each other, thereby causing the insulation layer between the wires to be damaged and a short circuit to occur.

[0005] For this reason, we urgently need to provide a special high-temperature resistant cable with good waterproof effect. Utility Model Content

[0006] The purpose of the utility model is to provide a special high-temperature resistant cable with good waterproof effect, so as to solve the problem that when the special high-temperature resistant cable with good waterproof effect proposed in the above-mentioned background technology is stretched for installation, the cable friction may cause the wires inside the cable to be entangled, rubbed and squeezed with each other, thereby causing the insulation layer between the wires to be damaged, and then a short circuit may occur.

[0007] To achieve the above purpose, the utility model provides the following technical solution: a special high-temperature resistant cable with good waterproof effect, comprising a cable inner core, the outer surface of the cable inner core is coated with an insulating layer, and the outer surface of the insulating layer is coated with a high-temperature resistant protective layer.

[0008] The cable core is formed by twisting multiple conductors, and the cable core and the insulation layer are both cylindrical. Multiple groups of cable cores are centered on one cable core, and the other cable cores are filled in a ring shape inside the high-temperature resistant protective layer. Flame retardant material is filled between the high-temperature resistant protective layer and the multiple groups of cable cores. On the one hand, the gap between the high-temperature resistant protective layer and the cable core is filled to ensure that the position of the cable core is relatively fixed, avoiding offset and entanglement between the cable cores. On the other hand, the cable core temperature is too high to prevent fire.

[0009] A further improvement is that the insulating layer is made of polytetrafluoroethylene, which has excellent insulation properties, and the high-temperature resistant protective layer is made of fire-resistant fiber cotton, which has excellent thermal stability, so that the special cable has better high-temperature resistance.

[0010] A further improvement is that a separation ring is also provided in the middle of the cable inner core, the separation ring is installed inside the high temperature resistant protective layer, and the separation ring is made of insulating rubber material as a whole.

[0011] A further improvement is that a through hole is formed through the outer surface of the separation ring, and the cable core passes through the inside of the through hole, so that the cable core is separated by the separation ring to prevent the cable core inside from being entangled with each other and squeezed, resulting in damage to the insulation layer, due to friction during cable laying and installation. The separation ring can be set to a fixed length to determine the usable length of the cable.

[0012] A further improvement is that the outer surface of the high temperature resistant protective layer is covered with a second insulating layer, and the outer surface of the second insulating layer is covered with an anti-stretching protective layer.

[0013] A further improvement is that the material of the second insulating layer is also made of insulating rubber, the material of the tensile-resistant protective layer is made of cross-linked polyethylene, and the inner layer is made of thermoplastic elastomer. Cross-linked polyethylene is a polyethylene whose molecular structure is changed from a linear chain to a three-dimensional network structure by chemical or physical methods. After cross-linking, the polyethylene not only maintains the original excellent properties of the polyethylene, but also overcomes and improves the mechanical, heat-resistant, chemical-resistant, creep-resistant and environmental-cracking-resistant properties of the polyethylene.

[0014] A further improvement is that the outer surface of the anti-stretching protective layer is covered with a waterproof layer, the bottom of the waterproof layer is fixedly connected to a guide rod, the outer wall of the waterproof layer is composed of a polyethylene material to form a waterproof outer layer, and the inner wall of the waterproof layer is composed of a composite material of aluminum, plastic and lead to form a comprehensive protective layer, wherein the polyethylene material used for the outer sheath is water-insoluble and can block water to a certain extent. After long-term use, moisture can still penetrate into the cable core through the polyethylene waterproof layer in the form of ions. Therefore, although the use of polyethylene material alone can block water, it cannot completely achieve the radial water-blocking goal. The inside still needs to be filled with composite materials to form a comprehensive protective layer, so as to better waterproof, and when water droplets gather at the bottom of the waterproof layer, the guide rod is used to guide the water droplets to gather at the bottom of the guide rod and guide the water droplets to fall, so as to avoid the water droplets hanging at the bottom of the waterproof layer for a long time, causing water infiltration.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] 1. This special cable with good waterproof effect and high temperature resistance uses a separator ring to separate the cable core to prevent the cable core from being entangled and squeezed with each other due to friction during installation, resulting in damage to the insulation layer. The separator ring can be set to a fixed length to determine the use length of the cable.

[0017] 2. This high-temperature resistant special cable with good waterproof effect has flame retardant materials filled between the high-temperature resistant protective layer and multiple groups of cable cores. On the one hand, the gap between the high-temperature resistant protective layer and the cable core is filled, thereby ensuring that the position of the cable core is relatively fixed and avoiding the offset and entanglement between the cable cores. On the other hand, it can prevent fire when the temperature of the cable core is too high.

[0018] 3. The high temperature resistant special cable with good waterproof effect has an outer wall of the waterproof layer composed of polyethylene material, and an inner wall of the waterproof layer composed of a composite material of aluminum, plastic and lead to form a comprehensive protective layer. The two cooperate to better waterproof, and guide water droplets to gather at the bottom of the guide rod and guide the water droplets to fall through the guide rod, so as to avoid water droplets hanging at the bottom of the waterproof layer for a long time and causing moisture infiltration. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a front view structural schematic diagram of the utility model;

[0020] Figure 2 It is a side view structural schematic diagram of the utility model;

[0021] Figure 3 For the utility model Figure 2 The schematic diagram of the cross-sectional structure at A in the middle;

[0022] Figure 4 This is a schematic diagram of the independent structure of the cable inner core of the utility model.

[0023] In the figure: 1. Cable core; 2. Insulation layer; 3. High temperature resistant protective layer; 4. Separation ring; 5. Second insulation layer; 6. Anti-tensile protective layer; 7. Waterproof layer; 8. Guide rod. DETAILED DESCRIPTION

[0024] 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.

[0025] See also Figure 1-Figure 4 , the utility model provides a technical solution:

[0026] Embodiment 1:

[0027] A high temperature resistant special cable with good waterproof effect comprises a cable inner core 1, the outer surface of the cable inner core 1 is coated with an insulating layer 2, and the outer surface of the insulating layer 2 is coated with a high temperature resistant protective layer 3.

[0028] The cable core 1 is formed by twisting multiple conductors, and the cable core 1 and the insulating layer 2 are both cylindrical. Multiple groups of cable cores 1 are centered on one cable core, and other cable cores 1 are filled in a ring shape inside the high-temperature resistant protective layer 3. Flame retardant material is filled between the high-temperature resistant protective layer 3 and the multiple groups of cable cores 1. On the one hand, the gap between the high-temperature resistant protective layer 3 and the cable core 1 is filled, thereby ensuring that the position of the cable core 1 is relatively fixed to avoid offset and entanglement between the cable cores 1. On the other hand, the cable core 1 can be fire-proofed when the temperature is too high.

[0029] The insulating layer 2 is made of polytetrafluoroethylene, which has excellent insulation properties. The high-temperature resistant protective layer 3 is made of fire-resistant fiber cotton, which has excellent thermal stability, so that the special cable has good high-temperature resistance.

[0030] The outer surface of the high temperature resistant protective layer 3 is covered with a second insulating layer 5 , and the outer surface of the second insulating layer 5 is covered with an anti-stretching protective layer 6 .

[0031] The second insulating layer 5 is also made of insulating rubber, and the anti-stretching protective layer 6 is made of cross-linked polyethylene, and its inner layer is made of thermoplastic elastomer. Cross-linked polyethylene uses chemical or physical methods to change the molecular structure of polyethylene from a linear chain to a three-dimensional network structure. After cross-linking, polyethylene not only maintains the original excellent properties of polyethylene, but also overcomes and improves the mechanical, heat resistance, chemical resistance, creep resistance and environmental cracking resistance of polyethylene.

[0032] The outer surface of the anti-stretching protective layer 6 is covered with a waterproof layer 7, and the bottom of the waterproof layer 7 is fixedly connected with a guide rod 8. The outer wall of the waterproof layer 7 is composed of a polyethylene material to form a waterproof outer layer, and the inner wall of the waterproof layer 7 is composed of a composite material composed of aluminum, plastic and lead to form a comprehensive protective layer. The polyethylene material used in the outer sheath is water-insoluble and can block water to a certain extent. After long-term use, moisture can still penetrate into the cable core 1 through the polyethylene waterproof layer in the form of ions. Therefore, although the use of polyethylene material alone can block water, it cannot completely achieve the radial water-blocking goal. The inside still needs to be filled with composite materials to form a comprehensive protective layer, so as to better waterproof. When water droplets gather at the bottom of the waterproof layer 7, the guide rod 8 guides the water droplets to gather at the bottom of the guide rod 8 and guides the water droplets to fall, so as to avoid water droplets hanging at the bottom of the waterproof layer 7 for a long time, causing water infiltration.

[0033] Embodiment 2:

[0034] On the basis of the first embodiment, a separation ring 4 is further provided in the middle of the cable inner core 1 . The separation ring 4 is installed inside the high temperature resistant protective layer 3 , and the whole separation ring is made of insulating rubber material.

[0035] The outer surface of the separation ring 4 is penetrated with a through hole, and the cable core 1 passes through the inside of the through hole, so that the cable core 1 is separated by the separation ring 4 to prevent the cable core 1 from being entangled with each other and squeezed during the installation of the cable, thereby preventing the insulation layer 2 from being damaged. The separation ring 4 can be set to a fixed length to determine the use length of the cable.

[0036] 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 statement "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

Claims

1. A high temperature resistant special cable with good waterproof effect, comprising a cable inner core (1), characterized in that: The outer surface of the cable inner core (1) is coated with an insulating layer (2), and the outer surface of the insulating layer (2) is coated with a high temperature resistant protective layer (3); The cable core (1) is formed by twisting a plurality of conductors, and the cable core (1) and the insulating layer (2) are both cylindrical. A plurality of groups of cable cores (1) are centered on one cable core, and the other cable cores (1) are annularly filled inside the high temperature resistant protective layer (3).

2. A high temperature resistant special cable with good waterproof effect according to claim 1, characterized in that: The insulating layer (2) is made of polytetrafluoroethylene material, and the high temperature resistant protective layer (3) is made of fire resistant fiber cotton material.

3. A high temperature resistant special cable with good waterproof effect according to claim 1, characterized in that: A separation ring (4) is also provided in the middle of the cable inner core (1); the separation ring (4) is installed inside the high temperature resistant protective layer (3), and is made entirely of insulating rubber material.

4. A high temperature resistant special cable with good waterproof effect according to claim 3, characterized in that: The outer surface of the separation ring (4) is penetrated by a through hole, and the cable inner core (1) passes through the interior of the through hole.

5. A high temperature resistant special cable with good waterproof effect according to claim 1, characterized in that: The outer surface of the high temperature resistant protective layer (3) is covered with a second insulating layer (5), and the outer surface of the second insulating layer (5) is covered with an anti-stretching protective layer (6).

6. A high temperature resistant special cable with good waterproof effect according to claim 5, characterized in that: The material of the second insulating layer (5) is also made of insulating rubber, the material of the tensile-resistant protective layer (6) is made of cross-linked polyethylene, and the inner layer thereof is made of thermoplastic elastomer.

7. A high temperature resistant special cable with good waterproof effect according to claim 6, characterized in that: The outer surface of the anti-stretching protective layer (6) is covered with a waterproof layer (7), and the bottom of the waterproof layer (7) is fixedly connected with a guide rod (8).

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