A tensile resistant, flame retardant, fire resistant power cable
By using a limit mechanism and a return spring connection, combined with halogen-free low-smoke flame-retardant polyolefin material and magnesium oxide flame-retardant layer, the problems of insufficient tensile strength and inconvenient disassembly of cables are solved, achieving stable cable connection and efficient fire resistance.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- JIANGSU HENGFENG CABLE
- Filing Date
- 2025-06-27
- Publication Date
- 2026-07-31
AI Technical Summary
Existing fire-resistant cables have insufficient tensile strength, making them unsuitable for long-term outdoor use, and they are inconvenient to disassemble when damaged.
The cable employs a connection method that combines a limiting mechanism and a return spring, and enhances its tensile strength through the sliding connection of the plug rod and the sliding block; the use of halogen-free, low-smoke, flame-retardant polyolefin materials and a flame-retardant layer made of magnesium oxide improves the cable's fire resistance.
It enhances the tensile stability of the cable, facilitates cable disassembly and replacement, and provides effective fire protection when exposed to external heat.
Smart Images
Figure CN224582037U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of cable technology, and in particular relates to a tensile-resistant, flame-retardant, and fire-resistant power cable. Background Technology
[0002] Power cables are cables used to transmit and distribute electrical energy. They are commonly used in urban underground power grids, power plant lead-out lines, internal power supply for industrial and mining enterprises, and underwater power transmission lines across rivers and seas. Cables are conductors with insulation layers and protective sheaths, composed of multiple strands of insulated conductors. They are mostly strung in the air or installed underground or underwater for telecommunications or power transmission.
[0003] While existing fire-resistant power cables have improved their fire resistance to some extent, their tensile strength is insufficient. Cables with insufficient tensile strength are not conducive to long-term use outdoors, and disassembly is inconvenient when a section of the existing power cable is damaged. Therefore, we propose a tensile-strength, flame-retardant, fire-resistant power cable. Utility Model Content
[0004] The purpose of this invention is to provide a tensile-resistant, flame-retardant, and fire-resistant power cable to solve the problems mentioned in the background art.
[0005] In view of this, the present invention provides a tensile-resistant, flame-retardant, and fire-resistant power cable, comprising:
[0006] A cable protective sleeve, wherein a first fixing ring is fixedly installed on the outer side wall of the cable protective sleeve, an installation ring is fixedly installed on one side of the first fixing ring, an insert ring is fixedly installed on the top surface of the installation ring, a second fixing ring is fixedly installed on one end of the cable protective sleeve, and a groove is formed on the outer side wall of the second fixing ring, wherein the inner top surface of the groove contacts and engages with the top surface of the installation ring.
[0007] The first slot is located on the inner side wall of the second fixing ring. The insertion ring is inserted into the first slot. The second fixing ring has a U-shaped sliding groove. A sliding block is slidably installed in the sliding groove. The insertion ring has a second slot on one side. Both the second slot and the sliding block are U-shaped.
[0008] Multiple connecting rods are fixedly installed on one side of the sliding block. The multiple connecting rods are located in the slide groove. Multiple first cavities are opened in the second fixing ring. The multiple first cavities are respectively located at one end of the multiple connecting rods. One end of the multiple connecting rods extends through the inner sidewall of the slide groove and into the multiple first cavities.
[0009] A limiting mechanism is provided inside the second fixed ring and is used to limit the sliding block.
[0010] Multiple conductors are disposed inside a cable protective sleeve. The outer walls of the multiple conductors are covered with the same insulating layer, and fire-retardant filler is used to fill the space between the multiple conductors and the insulating layer.
[0011] In the above technical solution, the limiting mechanism further includes a second cavity, which is opened inside a second fixing ring. The second cavity is U-shaped and communicates with multiple first cavities. A sliding plate is slidably installed inside the second cavity. The sliding plate is U-shaped. One end of multiple connecting rods is fixedly connected to one side of the sliding plate. A insertion hole is opened on one side of the second fixing ring. The same insertion rod is movably sleeved between the insertion hole and the second cavity. One end of the insertion rod is fixedly connected to the other side of the sliding plate.
[0012] In the above technical solution, the limiting mechanism further includes multiple limiting plates, which are respectively fixedly installed on the outer side walls of multiple connecting rods. Each of the multiple connecting rods is provided with a return spring. The multiple return springs and the multiple limiting plates are respectively located in multiple first cavities. The multiple limiting plates are slidably connected to the inner side walls of the multiple first cavities. One end of each of the multiple return springs is fixedly connected to the inner side wall of the multiple first cavities, and the other end of each of the multiple return springs is fixedly connected to one side of each of the multiple limiting plates.
[0013] In the above technical solution, further, an insulating layer is provided on the outer wall of the insulating layer, and a flame-retardant layer is provided on the outer wall of the insulating layer.
[0014] In the above technical solution, the fireproof filler is further described as a halogen-free, low-smoke, flame-retardant polyolefin material.
[0015] In the above technical solution, the flame-retardant layer is further made of magnesium oxide.
[0016] In the above technical solution, a sealing gasket is further provided on the top surface of the mounting ring and the inner top surface of the groove.
[0017] The beneficial effects of this utility model are:
[0018] 1. To enhance the tensile strength of this flame-retardant and fire-resistant power cable, after preparing two devices to be connected, first stretch the plug outward and drive the sliding plate outward. When the sliding plate slides outward, multiple connecting rods and sliding blocks at one end of multiple connecting rods also slide outward. Then, place the mounting ring below the second fixing ring and align it with the second fixing ring. Insert the plug ring on the top surface of the mounting ring into the first slot. After releasing the plug, multiple return springs and multiple limit plates will drive multiple connecting rods and sliding blocks to slide inward. When the sliding block slides into the second slot, the device is fixed. After being connected in this way, the stability can be enhanced when encountering external tension, and it can play a role in resisting tension.
[0019] 2. When a section of this tensile-resistant, flame-retardant, and fire-resistant power cable is damaged and needs to be replaced after the device is connected, the damaged section can be disassembled according to the above steps, which is convenient. When exposed to external heat, the flame-retardant layer is made of magnesium oxide, which has a high ignition point. Furthermore, the fire-retardant filler is made of halogen-free, low-smoke, flame-retardant polyolefin material, which has excellent properties such as low smoke, low toxicity, flame retardancy, and low corrosivity. This effectively protects the multiple conductors inside the device, providing practical benefits. Attached Figure Description
[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0021] Figure 2 This is a front view cross-sectional structural diagram of the present invention;
[0022] Figure 3 This is a schematic diagram of the second fixing ring structure of this utility model;
[0023] Figure 4 This is a schematic diagram of the internal structure of the second fixed ring of this utility model;
[0024] Figure 5 This utility model Figure 4 Enlarged structural diagram at point A in the middle.
[0025] The markings in the diagram are as follows:
[0026] 1. Cable protective sleeve; 2. First fixing ring; 3. Mounting ring; 4. Insert ring; 5. Second fixing ring; 6. Groove; 7. First slot; 8. Guide core; 9. Flame retardant layer; 10. Insulating layer; 11. Insulating layer; 12. Fireproof filler; 13. Slide groove; 14. Sliding block; 15. Second slot; 16. First cavity; 17. Connecting rod; 18. Second cavity; 19. Sliding plate; 20. Insertion hole; 21. Insertion rod; 22. Limiting plate; 23. Return spring. Detailed Implementation
[0027] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.
[0028] In the description of this application, it should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. For ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.
[0029] It should be noted that the terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and are not limited in number; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.
[0030] It should be noted that in the description of this application, the directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this application. The directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.
[0031] It should be noted that, in this application, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. Furthermore, it should be noted that the scope of the methods and apparatuses in the embodiments of this application is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in the reverse order, depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples. Example 1
[0032] Please see Figures 1-5 As shown in the figure, this embodiment provides a tensile-resistant, flame-retardant, and fire-resistant power cable.
[0033] include:
[0034] A cable protective sleeve 1 has a first fixing ring 2 fixedly installed on its outer wall. An installation ring 3 is fixedly installed on one side of the first fixing ring 2. A plug ring 4 is fixedly installed on the top surface of the installation ring 3. A second fixing ring 5 is fixedly installed at one end of the cable protective sleeve 1. A groove 6 is formed on the outer wall of the second fixing ring 5, and the top surface of the groove 6 contacts and engages with the top surface of the installation ring 3. A first slot 7 is formed on the inner wall of the second fixing ring 5, and the plug ring 4 is inserted into the first slot 7. A sliding groove 13 is formed inside the second fixing ring 5. The sliding groove 13 is U-shaped, and a sliding block 14 is slidably installed inside the sliding groove 13. A second slot 15 is formed on one side of the plug ring 4. Both the second slot 15 and the sliding block 14 are U-shaped. Multiple connecting rods 17 are fixedly installed on the sliding block 14. On one side, multiple connecting rods 17 are located within the slide groove 13. Multiple first cavities 16 are provided within the second fixing ring 5. Each of the multiple first cavities 16 is located at one end of a multiple connecting rod 17. One end of each connecting rod 17 extends through the inner wall of the slide groove 13 and into the multiple first cavities 16. A limiting mechanism is provided within the second fixing ring 5 and is used to limit the sliding block 14. Multiple guide cores 8 are provided within the cable protection sleeve 1. The outer walls of the multiple guide cores 8 are fitted with the same insulating layer 11. Fireproof filler 12 is filled between the multiple guide cores 8 and the insulating layer 11. When the sliding block 14 slides into the second slot 15, the device is fixed. After being connected in this way, the stability can be enhanced when encountering external tension, thus playing a role in tensile resistance. Example 2
[0035] This embodiment provides a tensile-resistant, flame-retardant, and fire-resistant power cable, which, in addition to the technical solutions of the above embodiments, also has the following technical features.
[0036] The limiting mechanism includes a second cavity 18, which is located within a second fixing ring 5. The second cavity 18 is U-shaped and communicates with multiple first cavities 16. A sliding plate 19 is slidably installed inside the second cavity 18. The sliding plate 19 is U-shaped, and one end of multiple connecting rods 17 is fixedly connected to one side of the sliding plate 19. An insertion hole 20 is provided on one side of the second fixing ring 5. The same insertion rod 21 is movably sleeved between the insertion hole 20 and the second cavity 18. One end of the insertion rod 21 is fixedly connected to the other side of the sliding plate 19. When the insertion rod 21 is stretched outward, it causes the sliding plate 19 to slide outward. When the sliding plate 19 slides outward, the multiple connecting rods 17 and the sliding blocks 14 at one end of the multiple connecting rods 17 also slide outward, which has the advantage of convenience. Example 3
[0037] This embodiment provides a tensile-resistant, flame-retardant, and fire-resistant power cable, which, in addition to the technical solutions of the above embodiments, also has the following technical features.
[0038] The limiting mechanism also includes multiple limiting plates 22, which are fixedly installed on the outer walls of multiple connecting rods 17. Each connecting rod 17 is provided with a return spring 23. The multiple return springs 23 and the multiple limiting plates 22 are located in multiple first cavities 16. The multiple limiting plates 22 are slidably connected to the inner walls of the multiple first cavities 16. One end of each of the multiple return springs 23 is fixedly connected to the inner wall of the multiple first cavities 16, and the other end of each of the multiple return springs 23 is fixedly connected to one side of each of the multiple limiting plates 22. After the insertion rod 21 is released, the multiple connecting rods 17 and the sliding block 14 will slide inward under the cooperation of the multiple return springs 23 and the multiple limiting plates 22, which has the advantage of convenience. Example 4
[0039] This embodiment provides a tensile-resistant, flame-retardant, and fire-resistant power cable, which, in addition to the technical solutions of the above embodiments, also has the following technical features.
[0040] The outer wall of the insulating layer 11 is fitted with an insulating layer 10, and the outer wall of the insulating layer 10 is fitted with a flame-retardant layer 9. The insulating layer 10 and the flame-retardant layer 9 can reduce the impact when heated. Example 5
[0041] This embodiment provides a tensile-resistant, flame-retardant, and fire-resistant power cable, which, in addition to the technical solutions of the above embodiments, also has the following technical features.
[0042] Among them, the fireproof filler 12 is a halogen-free, low-smoke, flame-retardant polyolefin material. As the fireproof filler 12 is a halogen-free, low-smoke, flame-retardant polyolefin material, it has excellent properties such as low smoke, low toxicity, flame retardancy, and low corrosivity. Example 6
[0043] This embodiment provides a tensile-resistant, flame-retardant, and fire-resistant power cable, which, in addition to the technical solutions of the above embodiments, also has the following technical features.
[0044] Among them, the flame retardant layer 9 is made of magnesium oxide. Since the flame retardant layer 9 is made of magnesium oxide, it has a high ignition point and has practical benefits. Example 7
[0045] This embodiment provides a tensile-resistant, flame-retardant, and fire-resistant power cable, which, in addition to the technical solutions of the above embodiments, also has the following technical features.
[0046] Both the top surface of the mounting ring 3 and the inner top surface of the groove 6 are provided with sealing gaskets. The sealing gaskets can enhance the sealing performance of the device and have the advantage of stability.
[0047] In use: To enhance the tensile strength of the device, after preparing two devices to be connected, first stretch the insertion rod 21 outward and drive the sliding plate 19 to slide outward. When the sliding plate 19 slides outward, the multiple connecting rods 17 and the sliding blocks 14 at one end of the multiple connecting rods 17 also slide outward. Then, place the mounting ring 3 below the second fixing ring 5 and align it with the second fixing ring 5. After inserting the insertion ring 4 on the top surface of the mounting ring 3 into the first slot 7, release the insertion rod 21. With the cooperation of multiple return springs 23 and multiple limit plates 22, the multiple connecting rods 17 and sliding blocks 14 will slide inward. When the sliding block 14 slides into the first slot 7... After the second slot 15, the device is fixed. This connection method enhances stability when subjected to external tension, providing tensile resistance. If a section of the device is damaged and needs replacement, it can be disassembled according to the above steps, which is convenient. Furthermore, when exposed to external heat, the flame-retardant layer 9, made of magnesium oxide, has a high ignition point, and the fire-retardant filler 12, made of halogen-free, low-smoke, flame-retardant polyolefin, has excellent properties such as low smoke, low toxicity, flame retardancy, and low corrosivity, effectively protecting the multiple conductor cores 8 inside the device, which is a practical benefit.
[0048] The embodiments of this application have been described above with reference to the accompanying drawings. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. This application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.
Claims
1. A tensile-resistant, flame-retardant, fire-resistant power cable, characterized in that, include: A cable protective sleeve (1) is provided with a first fixing ring (2) fixedly installed on the outer side wall of the cable protective sleeve (1), an installation ring (3) fixedly installed on one side of the first fixing ring (2), an insert ring (4) fixedly installed on the top surface of the installation ring (3), and a second fixing ring (5) fixedly installed at one end of the cable protective sleeve (1). A groove (6) is provided on the outer side wall of the second fixing ring (5), and the inner top surface of the groove (6) contacts and cooperates with the top surface of the installation ring (3). The first slot (7) is opened on the inner side wall of the second fixing ring (5). The insertion ring (4) is inserted into the first slot (7). The second fixing ring (5) has a sliding groove (13) inside. The sliding groove (13) is U-shaped. A sliding block (14) is slidably installed in the sliding groove (13). The insertion ring (4) has a second slot (15) on one side. Both the second slot (15) and the sliding block (14) are U-shaped. Multiple connecting rods (17) are fixedly installed on one side of the sliding block (14). The multiple connecting rods (17) are located in the slide groove (13). Multiple first cavities (16) are opened in the second fixing ring (5). The multiple first cavities (16) are respectively located at one end of the multiple connecting rods (17). One end of the multiple connecting rods (17) extends through the inner wall of the slide groove (13) and into the multiple first cavities (16). A limiting mechanism is provided inside the second fixed ring (5) and is used to limit the sliding block (14); Multiple conductor cores (8) are disposed inside the cable protective sleeve (1). The outer walls of the multiple conductor cores (8) are covered with the same insulation layer (11). Fireproof filler (12) is filled between the multiple conductor cores (8) and the insulation layer (11).
2. The tensile-resistant, flame-retardant, and fire-resistant power cable according to claim 1, characterized in that, The limiting mechanism includes a second cavity (18), which is opened inside the second fixing ring (5). The second cavity (18) is U-shaped and is connected to multiple first cavities (16). A sliding plate (19) is slidably installed inside the second cavity (18). The sliding plate (19) is U-shaped. One end of multiple connecting rods (17) is fixedly connected to one side of the sliding plate (19). A socket (20) is opened on one side of the second fixing ring (5). The same plug rod (21) is movably sleeved between the socket (20) and the second cavity (18). One end of the plug rod (21) is fixedly connected to the other side of the sliding plate (19).
3. The tensile-resistant, flame-retardant, and fire-resistant power cable according to claim 2, characterized in that, The limiting mechanism also includes multiple limiting plates (22), which are fixedly installed on the outer side walls of multiple connecting rods (17). Each of the multiple connecting rods (17) is provided with a return spring (23). The multiple return springs (23) and the multiple limiting plates (22) are respectively located in multiple first cavities (16). The multiple limiting plates (22) are slidably connected to the inner side walls of the multiple first cavities (16). One end of the multiple return springs (23) is fixedly connected to the inner side walls of the multiple first cavities (16), and the other end of the multiple return springs (23) is fixedly connected to one side of the multiple limiting plates (22).
4. The tensile-resistant, flame-retardant, and fire-resistant power cable according to claim 1, characterized in that, The outer wall of the insulating layer (11) is fitted with an insulating layer (10), and the outer wall of the insulating layer (10) is fitted with a flame-retardant layer (9).
5. The tensile-resistant, flame-retardant, and fire-resistant power cable according to claim 1, characterized in that, The fire-retardant filler (12) is a halogen-free, low-smoke, flame-retardant polyolefin material.
6. The tensile-resistant, flame-retardant, and fire-resistant power cable according to claim 4, characterized in that, The flame-retardant layer (9) is made of magnesium oxide.
7. The tensile-resistant, flame-retardant, and fire-resistant power cable according to claim 1, characterized in that, Both the top surface of the mounting ring (3) and the inner top surface of the groove (6) are provided with sealing gaskets.