High-temperature-resistant cable with double protective layers
By installing inner and outer fireproof layers and supporting structures on the outside of the cable, the problem of insufficient fire resistance of existing cables is solved, and the fire resistance and stability are enhanced.
Patent Information
- Application Number
- CN202511367849.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-24
- Publication Date
- 2025-11-11
AI Technical Summary
Existing cables only have one fireproof layer. When this layer is burned, the cable will be quickly destroyed, so there is an urgent need to improve the fire resistance of cables.
A high-temperature resistant cable with double protective layers was designed, including an inner fireproof layer and an outer fireproof layer, combined with a support shaft, support frame and positioning support ring, to enhance the fire resistance and stability of the cable.
Multi-layer fire-resistant protection improves the fire resistance and stability of the cable, enhances its compressive strength and extrusion resistance, and extends its normal operating time.
Smart Images
Figure CN120932983A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of cable technology, and in particular to a high-temperature resistant cable with double protective layers. Background Technology
[0002] With the rapid development of optical communication technology, optical cables have been widely used in the backbone network and inter-office trunk lines of my country's wired communication network. The entry of optical fiber into the access network has become an inevitable trend. However, the cost of laying optical cables is too high. Therefore, for a long time before the popularization of optical fiber, the user lines of the access network will still be mainly metal cables. Metal cables mainly include three types: all-plastic cables, coaxial cables, and data cables. Among them, data cables are currently the most ideal transmission medium for broadband access networks. They have the advantages of low manufacturing cost, simple structure, good expandability, and easy network upgrade. They are mainly used for building integrated cabling and community computer integrated cabling, etc.
[0003] Current building cabling technologies typically employ cables with a fire-resistant layer on the outside of the conductor core. However, existing cables generally only have one fire-resistant layer, which is quickly destroyed when it is burned. Therefore, there is an urgent need for a double-protected, high-temperature resistant cable. Summary of the Invention
[0004] (a) Technical problems to be solved To address the shortcomings of existing technologies, this invention provides a double-protected high-temperature resistant cable, which significantly improves the cable's fire resistance through double-layer high-temperature protection.
[0005] (II) Technical Solution To achieve the above objectives, this application provides a double-protection layer high-temperature resistant cable, including a data transmission core. Multiple sets of the data transmission core are arranged at equal angles. An inner filling layer is wrapped around the outside of the data transmission core. An outer shielding layer is disposed outside the inner filling layer. An inner fireproof layer is disposed on the outer wall of the outer shielding layer. An outer armor layer is disposed outside the inner fireproof layer. An outer fireproof layer is disposed outside the outer armor layer. An outer protective layer is disposed outside the outer fireproof layer.
[0006] Preferably, the data transmission line core includes a conductor core, an insulation layer is provided on the outside of the conductor core, an inner shielding layer is provided on the outside of the insulation layer, and an inner waterproof layer is provided on the outside of the inner shielding layer.
[0007] Preferably, a support shaft is provided at the center of the multiple sets of data transmission cores, and multiple support frames are fixed at intervals along the length direction on the support shaft. The support frames position the data transmission cores outside the support shaft, and the inner filling layer is filled between and on the outside of two adjacent support frames.
[0008] Preferably, the support frame includes a circular support disk, and a plurality of arc-shaped grooves are spaced apart on the circumference of the circular support disk, the arc-shaped grooves being of a more rounded shape; the data transmission line core is fitted into the arc-shaped grooves.
[0009] Preferably, the inner shielding layer is made of silver-plated copper wire braid with a braiding angle of 45°±2° and a shielding effectiveness of ≥75dB@10GHz.
[0010] Preferably, an outer filling layer and an inner protective layer are sequentially disposed between the outer armor layer and the outer fireproof layer.
[0011] Preferably, a plurality of positioning support rings are provided at intervals along the length direction on the outer side of the outer armor layer, and the positioning support rings are located inside the outer filling layer.
[0012] Preferably, the positioning support ring includes a first half-ring and a second half-ring, the two ends of the first half-ring and the second half-ring that are close to each other are detachably fixedly connected; a plurality of spherical protrusions are provided at intervals along the circumferential direction on the outer side of the first half-ring and the second half-ring; and anti-slip texture is provided on the side of the first half-ring and the second half-ring that is close to the outer armor layer.
[0013] Preferably, the inner and outer filling layers are made of cable paste with heat absorption efficiency.
[0014] Preferably, the first half-ring has a first connecting step at both ends near the second half-ring, and the second half-ring has a second connecting step at both ends near the first half-ring. When the first half-ring and the second half-ring are enclosed to form a circle, the first connecting step and the second connecting step abut against each other. A countersunk hole is provided on the first connecting step, and a threaded hole is provided on the second connecting step. When the first connecting step and the second connecting step abut against each other, the countersunk hole and the threaded hole are in a concentric position, and a locking screw is provided in the countersunk hole and the threaded hole.
[0015] (III) Beneficial Effects This invention provides a double-protected high-temperature resistant cable. By setting an inner fireproof layer and an outer fireproof layer on the outside of the cable's transmission core, multiple layers of fire-resistant protection are applied to the conductor core, enhancing the cable's fire resistance and stability. The support shaft and support frame provide internal support and positioning for multiple data transmission cores, facilitating installation and improving the cable's compressive strength after installation. Under external pressure, the internal data transmission cores are protected to some extent. The positioning support ring on the outer side of the outer armor layer not only secures the outer armor layer but also improves the cable's resistance to compression from the outside. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the structure of a double-protective-layer high-temperature resistant cable according to the present invention; Figure 2 A cross-sectional view highlighting the data transmission conductor of this invention; Figure 3 This is a cross-sectional view highlighting the connection structure between the support frame and the data transmission line core of the present invention; Figure 4 This is a schematic diagram of the support frame of the present invention; Figure 5 This is a cross-sectional view highlighting the positioning support ring of the present invention; Figure 6 To highlight the present invention Figure 5 Enlarged view of structure A in the middle.
[0017] Marked in the attached diagram: 100. Data transmission core; 110. Conductor core; 120. Insulation layer; 130. Inner shielding layer; 140. Inner waterproof layer; 150. Support shaft; 160. Support frame; 161. Circular support plate; 162. Arc groove; 200. Inner filling layer; 300. Outer shielding layer; 400. Inner fireproof layer; 500. Outer armor layer; 510. Positioning support ring; 511. First half-ring; 512. Second half-ring; 513. Spherical protrusion; 514. First connecting step; 515. Second connecting step; 516. Countersunk hole; 517. Threaded hole; 518. Locking screw; 600. Outer fireproof layer; 700. Outer protective layer; 800. Outer filling layer; 900. Inner protective layer. Detailed Implementation
[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0019] Example This invention provides a double-protected high-temperature resistant cable, see [link / reference]. Figures 1-6The cable includes a data transmission core 100, with multiple sets of cores arranged at various angles. An inner filling layer 200 is wrapped around the outside of the data transmission core 100. An outer shielding layer 300 is located outside the inner filling layer 200. An inner fire-resistant layer 400 is located on the outer wall of the outer shielding layer 300. An outer armor layer 500 is located outside the inner fire-resistant layer 400. An outer fire-resistant layer 600 is located outside the outer armor layer 500. An outer protective layer 700 is located outside the outer fire-resistant layer 600. This application provides multi-layered fire-resistant protection for the conductor core by incorporating an inner fire-resistant layer 400 and an outer fire-resistant layer 600 on the outside of the cable transmission core, thereby enhancing the cable's fire resistance and stability.
[0020] Specifically, the data transmission core 100 includes a conductor core 110, an insulation layer 120 on the outside of the conductor core 110, an inner shielding layer 130 on the outside of the insulation layer 120, and an inner waterproof layer 140 on the outside of the inner shielding layer 130. The inner shielding layer 130 is made of silver-plated copper wire braid with a braiding angle of 45°±2°, providing a shielding effectiveness ≥75dB@10GHz. The outer shielding layer 300 can use graphene-coated aluminum foil (12μm thick), with an overlap rate ≥40%, improving electromagnetic interference (EMI) immunity by 50%. The inner shielding layer 130 and the outer shielding layer 300 significantly enhance the shielding effect of the cable.
[0021] A support shaft 150 is provided at the center of the multiple sets of data transmission cores 100. During installation, the support shaft 150 provides support to the outer sets of data transmission cores 100 from the central position, facilitating processing.
[0022] Furthermore, multiple support frames 160 are fixed at intervals along the length direction on the support shaft 150. The support frames 160 position the data transmission line core 100 on the outside of the support shaft 150. An inner filling layer 200 is filled between and on the outside of two adjacent support frames 160.
[0023] The support frame 160 includes a circular support plate 161, on which multiple arc-shaped grooves 162 are spaced apart. The arc-shaped grooves 162 are approximately round. The data transmission cores 100 are fitted into the arc-shaped grooves 162. The support frame 160 provides internal support and positioning for the multiple data transmission cores 100, facilitating installation and improving the cable's compressive strength after installation. It also provides some protection for the internal data transmission cores 100 under external pressure.
[0024] An outer filling layer 800 and an inner protective layer 900 are sequentially arranged between the outer armor layer 500 and the outer fireproof layer 600.
[0025] Multiple positioning support rings 510 are spaced along the length of the outer armor layer 500, and these rings are located inside the outer filler layer 800. During processing, the positioning support rings 510 on the outer side of the outer armor layer 500 not only secure the outer armor layer 500 but also improve the cable's resistance to compression from the outside. Furthermore, an inner protective layer 900 is formed outside the inner fire-resistant layer 400, and an outer protective layer 700 is formed outside the outer fire-resistant layer 600. Even if the outer fire-resistant layer 600 fails, the inner fire-resistant layer 400 and the inner protective layer 900 remain on the cable, providing protection and extending its normal operating time.
[0026] The positioning support ring 510 includes a first half-ring 511 and a second half-ring 512, with the two ends of the first half-ring 511 and the second half-ring 512 being detachably and fixedly connected. Multiple spherical protrusions 513 are spaced circumferentially on the outer sides of the first half-ring 511 and the second half-ring 512. Anti-slip textures are provided on the side of the first half-ring 511 and the second half-ring 512 near the outer armor layer 500. The spherical protrusions 513 on the outer side improve the connection with the outer filling layer 800.
[0027] Specifically, the first half-ring 511 has a first connecting step 514 at both ends near the second half-ring 512, and the second half-ring 512 has a second connecting step 515 at both ends near the first half-ring 511. When the first half-ring 511 and the second half-ring 512 are enclosed to form a circle, the first connecting step 514 and the second connecting step 515 abut against each other. A countersunk hole 516 is provided on the first connecting step 514, and a threaded hole 517 is provided on the second connecting step 515. When the first connecting step 514 and the second connecting step 515 abut against each other, the countersunk hole 516 and the threaded hole 517 are in a concentric position. A locking screw 518 is provided in the countersunk hole 516 and the threaded hole 517.
[0028] The inner filling layer 200 and the outer filling layer 800 are made of cable grease with heat absorption efficiency. During operation, the inner filling layer 200 and the outer filling layer 800 can fill the gaps and absorb the heat generated by the cable core during operation, and then release it to the outside.
[0029] This invention provides a double-protected high-temperature resistant cable. By setting an inner fireproof layer 400 and an outer fireproof layer 600 on the outside of the cable transmission core, multiple layers of fire-resistant protection are provided for the conductor core, enhancing the cable's fire resistance and stability. The support shaft 150 and support frame 160 provide support and positioning for multiple data transmission cores 100 from the inside, facilitating installation and improving the cable's compressive strength after installation. Under external pressure, the internal data transmission cores 100 are protected to a certain extent. The positioning support ring 510 on the outside of the outer armor layer 500 not only secures the outer armor layer 500 but also improves the cable's resistance to compression from the outside.
[0030] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," "front," and "rear," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and 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. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0031] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. Without conflict, the embodiments and features in the embodiments of this invention can be combined with each other.
[0032] The embodiments described above are merely illustrative of implementation methods of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of this patent should be determined by the appended claims.
Claims
1. A high-temperature resistant cable with double protective layers, characterized in that, The device includes a data transmission core (100), which is arranged in multiple groups at equal angles. An inner filling layer (200) is wrapped around the outside of the data transmission core (100). An outer shielding layer (300) is provided on the outside of the inner filling layer (200). An inner fireproof layer (400) is provided on the outer wall of the outer shielding layer (300). An outer armor layer (500) is provided on the outside of the inner fireproof layer (400). An outer fireproof layer (600) is provided on the outside of the outer armor layer (500). An outer protective layer (700) is provided on the outside of the outer fireproof layer (600).
2. The high-temperature resistant cable with double protective layers according to claim 1, characterized in that, The data transmission line core (100) includes a conductor core (110), an insulation layer (120) is provided on the outside of the conductor core (110), an inner shielding layer (130) is provided on the outside of the insulation layer (120), and an inner waterproof layer (140) is provided on the outside of the inner shielding layer (130).
3. The high-temperature resistant cable with double protective layers according to claim 1, characterized in that, A support shaft (150) is provided at the center of the multiple sets of data transmission cores (100). Multiple support frames (160) are fixed at intervals along the length direction on the support shaft (150). The support frames (160) position the data transmission cores (100) outside the support shaft (150). The inner filling layer (200) is filled between and on the outside of two adjacent support frames (160).
4. The high-temperature resistant cable with double protective layers according to claim 3, characterized in that, The support frame (160) includes a circular support plate (161), and a plurality of arc-shaped grooves (162) are spaced apart on the circumferential side of the circular support plate (161). The arc-shaped grooves (162) are round. The data transmission line core (100) is fitted into the arc-shaped grooves (162).
5. A high-temperature resistant cable with double protective layers according to claim 2, characterized in that, The inner shielding layer (130) is made of silver-plated copper wire braid with a braiding angle of 45°±2° and a shielding effectiveness of ≥75dB@10GHz.
6. A high-temperature resistant cable with double protective layers according to claim 1, characterized in that, An outer filling layer (800) and an inner protective layer (900) are sequentially provided between the outer armor layer (500) and the outer fireproof layer (600).
7. A high-temperature resistant cable with double protective layers according to claim 6, characterized in that, The outer armor layer (500) has a plurality of positioning support rings (510) spaced apart along its length, and the positioning support rings (510) are located inside the outer filling layer (800).
8. A high-temperature resistant cable with double protective layers according to claim 7, characterized in that, The positioning support ring (510) includes a first half-ring (511) and a second half-ring (512); The two ends of the first half-ring (511) and the second half-ring (512) that are close to each other are detachably fixedly connected; a plurality of spherical protrusions (513) are provided at intervals along the circumferential direction on the outer side of the first half-ring (511) and the second half-ring (512); anti-slip texture is provided on the side of the first half-ring (511) and the second half-ring (512) near the outer armor layer (500).
9. A high-temperature resistant cable with double protective layers according to claim 1, characterized in that, The inner filling layer (200) and the outer filling layer (800) are made of cable paste with heat absorption efficiency.
10. A high-temperature resistant cable with double protective layers according to claim 8, characterized in that, The first half-ring (511) has a first connecting step (514) at both ends near the second half-ring (512), and the second half-ring (512) has a second connecting step (515) at both ends near the first half-ring (511). When the first half-ring (511) and the second half-ring (512) are enclosed to form a circle, the first connecting step (514) and the second connecting step (515) abut against each other. A countersunk hole (516) is provided on the first connecting step (514), and a threaded hole (517) is provided on the second connecting step (515). When the first connecting step (514) and the second connecting step (515) abut against each other, the countersunk hole (516) and the threaded hole (517) are in a concentric position. A locking screw (518) is provided in the countersunk hole (516) and the threaded hole (517).