Flexible in-line fireproof cable

Abstract

The utility model relates to the technical field of fireproof cables, and provides a flexible in-line fireproof cable, which comprises an in-line frame, a plurality of fireproof power wire cores, a plurality of fireproof control wire cores, a filling layer, an isolation layer, an inner protection layer and an outer protection layer, and is characterized in that the in-line frame comprises an inner pipe body, an outer pipe body and a plurality of curved surface spacing walls, the outer pipe body is coaxially arranged at the outer side of the inner pipe body, and the outer pipe body is coaxially arranged at the outer side of the outer pipe body; the curved-surface spacing walls which are integrally in an inverted S shape are sequentially and integrally connected with the inner pipe body and the outer pipe body, spacing cavities are formed between the adjacent curved-surface spacing walls on the inner side of the inner pipe body, the fireproof power wire cores are straightly assembled between the adjacent curved-surface spacing walls in a one-to-one correspondence mode, and the multiple fireproof control wire cores are straightly assembled on the inner side of the inner pipe body of the straight bent frame. The multiple wire cores can be independently and straightly integrated in one transmission assembly in the manufacturing process, the material consumption is reduced, the flexibility of the cable is remarkably improved, and the cable is made to be suitable for a narrower, more complex and more integrated circuit while the high temperature resistance and fireproof performance of the cable are guaranteed.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of fireproof cables, and particularly relates to a flexible straight-row fireproof cable. BACKGROUND

[0002] With the development of modern industry and construction field, the application range of fireproof cables is increasingly expanding due to the key characteristics that the fireproof cables can maintain power transmission and signal transmission in extreme environments such as fire. The fireproof cables play a crucial role in ensuring personnel safety, maintaining the operation of key equipment and reducing fire loss.

[0003] However, in the existing fireproof cable technology, in order to significantly improve the high-temperature resistance and fireproof performance of the cable, a complex structure design of the cable is usually required, and the selection of materials is also extremely strict. Although this design and material selection can meet the fireproof requirements, it leads to a significant increase in the rigidity of the cable. Specifically, only very small size cores (usually the core cross-sectional area is less than 16 mm2) can be combined together by cabling to form a multi-core cable. For the cores with a single core size greater than 16 mm2, due to the limitation of their own rigidity, only single-core cables can be made. In addition, the cabling combination of small size cores not only cannot effectively solve the problem of cable rigidity, but also further increases the overall rigidity of the cable. In the process of spiral cabling, more materials need to be invested, which not only increases the production cost, but also reduces the production efficiency. More importantly, the single-core fireproof cable cannot meet the demand of integrated application lines, resulting in the need to lay multiple single-core cables to realize the line function in actual application. This approach not only puts higher requirements on the installation and laying space of the line, but also greatly increases the installation workload, bringing many inconveniences to construction and maintenance.

[0004] Therefore, while meeting the high-temperature resistance and fireproof performance, the existing fireproof cable technology is faced with many problems such as excessive rigidity, high production cost, and inconvenient installation and laying, and a new type of fireproof cable technology that can effectively solve these problems is urgently needed. CONTENT OF THE INVENTION

[0005] Therefore, in order to overcome the shortcomings of the prior art, the present application aims to provide a flexible straight-row fireproof cable.

[0006] The flexible straight-row fireproof cable provided by the application comprises a straight-row frame, a plurality of fireproof power line cores, a plurality of fireproof control line cores, a filling layer, an isolation layer, an inner protective layer and an outer protective layer. The straight-row frame comprises an inner tube body, an outer tube body and a plurality of curved surface interval walls. The outer tube body is coaxially arranged outside the inner tube body. The overall curved surface interval wall in an inverted S shape is integrally connected with the inner tube body and the outer tube body in sequence. The adjacent curved surface interval walls on the inner side of the inner tube body form interval cavities. The fireproof power line cores are straightly assembled between the adjacent curved surface interval walls in one-to-one correspondence. The plurality of fireproof control line cores are straightly assembled on the inner side of the inner tube body of the straight-row frame.

[0007] Optionally, in the flexible straight-row fireproof cable of the application, the curved surface interval wall comprises an inner end portion, a middle portion and an outer end portion connected in sequence from inside to outside. The inner end portion is in a straight line type as a whole. The lower end of the middle portion is integrally connected with the inner end portion and is curved in a clockwise direction. The lower end of the outer end portion is integrally connected with the middle portion and is curved in an anticlockwise direction.

[0008] Optionally, in the flexible straight-row fireproof cable of the application, the fireproof power line core comprises a power line core conductor and a shielding layer, a power inner insulation layer and a power outer insulation layer successively wrapped outside the power line core conductor from inside to outside.

[0009] Optionally, in the flexible straight-row fireproof cable of the application, the axis of the fireproof power line core is parallel to the axis of the inner tube body of the straight-row frame.

[0010] Optionally, in the flexible straight-row fireproof cable of the application, the fireproof power line core is straightly assembled in the gap cavity formed by the inner end portion of the curved surface interval wall, the middle portion of the adjacent curved surface interval wall and the outer tube body.

[0011] Optionally, in the flexible straight-row fireproof cable of the application, the fireproof control line core is arranged in the interval cavity on the inner side of the inner tube body in one-to-one correspondence as a group of two.

[0012] Optionally, in the flexible straight-row fireproof cable of the application, the axis of the fireproof control line core is parallel to the axis of the inner tube body of the straight-row frame.

[0013] Optionally, in the flexible straight-row fireproof cable of the application, the fireproof control line core comprises a control line core conductor and a control inner insulation layer and a control outer insulation layer successively wrapped outside the control line core conductor.

[0014] Optionally, in the flexible straight-row fireproof cable of the application, the filling layer is filled in the gap between the straight-row frame and the fireproof power line core.

[0015] Optionally, in the flexible straight-row fireproof cable of the application, the isolation layer, the inner protective layer and the outer protective layer are successively wrapped outside the filling layer from inside to outside.

[0016] The flexible straight-row fireproof cable according to the application can integrate multiple cores independently and flatly in a transmission assembly during manufacturing through comprehensive structural design, reduce material usage, avoid deformation and stress caused by cabling on internal components, significantly improve the flexibility of the cable, and make the cable applicable to more narrow, complex and integrated lines while ensuring the high-temperature resistance and fireproof performance of the cable. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the application, the drawings needed in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative effort on the basis of these drawings.

[0018] Figure 1 FIG. 1 is a structural example diagram of a flexible straight-row fireproof cable according to an embodiment of the application;

[0019] Figure 2 FIG. 2 is a structural example diagram of a straight-row frame according to an embodiment of the application;

[0020] Figure 3 FIG. 3 is a sectional example diagram of a straight-row frame according to an embodiment of the application;

[0021] Figure 4 FIG. 4 is a partial structural example diagram of a straight-row frame according to an embodiment of the application;

[0022] Figure 5 FIG. 5 is a structural example diagram of a fireproof power core according to an embodiment of the application;

[0023] Figure 6 FIG. 6 is a partial structural example diagram of a flexible straight-row fireproof cable according to an embodiment of the application;

[0024] In the drawings, 1 is a straight-row frame, 2 is a fireproof power core, 3 is a fireproof control core, 4 is a filling layer, 5 is an isolation layer, 6 is an inner protective layer, 7 is an outer protective layer, 11 is an inner tube body, 12 is an outer tube body, 13 is a curved spacing wall, 14 is a spacing cavity, 131 is an inner end portion, 132 is a middle portion, 133 is an outer end portion, 21 is a power core conductor, 22 is a shielding layer, 23 is a power inner insulation layer, 24 is a power outer insulation layer, 31 is a control core conductor, 32 is a control inner insulation layer, and 33 is a control outer insulation layer. DETAILED DESCRIPTION

[0025] The embodiments of the application will be described in detail below with reference to the drawings.

[0026] It should be noted that the following embodiments and features in the embodiments can be combined with each other in the case of no conflict; and all other embodiments obtained by those skilled in the art based on the embodiments in the present disclosure without creative labor shall fall within the scope of protection of the present disclosure.

[0027] It should be noted that various aspects of the embodiments described below are within the scope of the appended claims. As will be apparent, the aspects described herein can be implemented in various ways, and that any particular structure is merely an example. Based on this disclosure, one of ordinary skill in the art will appreciate that one aspect described herein can be implemented independently of any other aspects and that two or more of these aspects can be combined in any suitable manner. For example, an apparatus can be implemented or a method can be practiced using any number of the aspects set forth herein. In addition, such an apparatus can be implemented or such a method can be practiced using other structure and / or functionality in addition to or other than one or more of the aspects set forth herein.

[0028] Figure 1 As shown in FIG. 1, a flexible straight-row fireproof cable according to an embodiment of the present application includes a straight-row frame 1, a plurality of fireproof power line cores 2, a plurality of fireproof control line cores 3, a filling layer 4, an isolation layer 5, an inner protective layer 6, and an outer protective layer 7. The filling layer 4 is filled in the gap between the straight-row frame 1 and the fireproof power line cores 2. The isolation layer 5, the inner protective layer 6, and the outer protective layer 7 are sequentially wrapped outside the filling layer 4 from inside to outside. Figure 1 In the embodiment, the filling layer 4 is made of a lightweight high-temperature-resistant material with good process filling performance, such as being filled with alkali-free high-temperature-resistant glass fiber or being filled with a ceramic high-temperature-resistant material that can be porcelainized at high temperature. The filling layer 4 can improve the overall structural stability of the cable while improving the high-temperature resistance and fireproof performance. In the embodiment, the isolation layer 5, the inner protective layer 6, and the outer protective layer 7 can be specifically selected according to the design requirements of the actual application scene, such as being made of overlapping wrapped glass fiber tape or non-combustible mica tape. The inner protective layer 6 is made of longitudinally welded metal strip material, and the outer protective layer 7 is made of low-smoke halogen-free polyolefin material with high-temperature-resistant and flame-retardant properties.

[0029] Figure 2 As shown in FIG. 2 and FIG. 3, the straight-row frame 1 includes an inner tube body 11, an outer tube body 12, and a plurality of curved surface partition walls 13. The outer tube body 12 is coaxially arranged outside the inner tube body 11. The overall curved surface partition wall 13 is integrally connected to the inner tube body 11 and the outer tube body 12 in sequence. The interval cavities 14 are formed between the adjacent curved surface partition walls 13 on the inner side of the inner tube body 11. Figure 1 Figure 2 As shown in FIG. 2 and FIG. 3, the straight-row frame 1 includes an inner tube body 11, an outer tube body 12, and a plurality of curved surface partition walls 13. The outer tube body 12 is coaxially arranged outside the inner tube body 11. The overall curved surface partition wall 13 is integrally connected to the inner tube body 11 and the outer tube body 12 in sequence. The interval cavities 14 are formed between the adjacent curved surface partition walls 13 on the inner side of the inner tube body 11. ​

[0030] Figure 3 A sectional view of a straight row rack according to an embodiment of the present application is shown in FIG. 1. Figure 4 A partial structure view of a straight row rack according to an embodiment of the present application is shown in FIG. 2. Figures 1 to 4 As shown in FIG. 2, in this embodiment, the curved spacing wall 13 comprises, in sequence from inside to outside, an inner end portion 131, an intermediate portion 132 and an outer end portion 133 which are integrally connected. As an optional example, in this embodiment, the inner end portion 131 is linear as a whole, the lower end of the intermediate portion 132 is integrally connected with the inner end portion 131 and is curved in a clockwise direction, and the lower end of the outer end portion 133 is integrally connected with the intermediate portion 132 and is curved in an anticlockwise direction. In this embodiment, the structure design of the opposite curved directions makes the curved spacing wall 13 have excellent radial pressure bearing capacity while having the spacing effect on the fireproof power line core 2. In actual application, the straight row rack 1 can be integrally formed by using a high-temperature-resistant silicone rubber material, or can be made of other materials with excellent mechanical physical properties and high-temperature resistance, which is not limited in the present application.

[0031] Figure 5 A structure view of a fireproof power line core according to an embodiment of the present application is shown in FIG. 3. Figures 1 to 5 As shown in FIG. 3, in this embodiment, the fireproof power line core 2 comprises a power line core conductor 21 and, in sequence from inside to outside, a shielding layer 22, a power inner insulation layer 23 and a power outer insulation layer 24 which are wrapped outside the power line core conductor 21. In actual application, the internal components of the fireproof power line core 2 can be specifically selected according to the actual line design requirements and the service environment of laying. For example, the power line core conductor 21 can be made of copper material, the shielding layer 22 can be made of high-temperature-resistant semi-conductive cross-linked polyethylene material, the power inner insulation layer 23 can be made of non-combustible mica tape overlapping wrapping, and the power outer insulation layer 24 can be made of flame-retardant cross-linked polyethylene material.

[0032] In this embodiment, the fireproof power line core 2 is correspondingly and straightly assembled between adjacent curved spacing walls 13, and the axis of the fireproof power line core 2 is parallel to the axis of the inner tube body 11 of the straight row rack 1. Specifically, the fireproof power line core 2 is straightly assembled in the gap cavity formed by the inner end portion 131 of the curved spacing wall 13, the intermediate portion 132 of the adjacent curved spacing wall 13 and the outer tube body 12.

[0033] Figure 6 A partial structure view of a flexible straight row fireproof cable according to an embodiment of the present application is shown in FIG. 4. Figures 1 to 6As shown, in the flexible straight-row fireproof cable of the embodiment, the plurality of fireproof control wire cores 3 are arranged straight in the inner side of the inner tube body 11 of the straight-row frame 1. As an optional example, in the embodiment, the fireproof control wire cores 3 are arranged in pairs in the interval cavities 14 in the inner side of the inner tube body 11, and the axis of the fireproof control wire core 3 is parallel to the axis of the inner tube body 11 of the straight-row frame 1.

[0034] In the embodiment, through the structural design of the straight-row frame 1, the plurality of fireproof power wire cores 2 and the fireproof control wire core 3 are integrated independently and straightly in one transmission assembly in the manufacturing process without being twisted into a cable (i.e., each wire core is combined in a spiral). The straight arrangement reduces the material usage caused by the twisting into a cable, avoids the deformation and stress caused by the twisting into a cable on the internal components, significantly reduces the bending resistance of the cable as a whole, improves the flexibility of the cable, i.e., reduces the bending radius, and makes the cable applicable to more narrow, complex and integrated lines.

[0035] In the embodiment, the fireproof control wire core 3 includes a control wire core conductor 31 and a control inner insulation layer 32 and a control outer insulation layer 33 successively wrapped outside the control wire core conductor 31. In actual applications, the internal components of the fireproof control wire core 3 can be selected according to the actual line design requirements and the service environment of laying. For example, the control wire core conductor 31 is made of copper material, the control inner insulation layer 32 is made of non-combustible mica tape overlapping wrapping, and the control outer insulation layer 33 is made of flame-retardant cross-linked polyethylene material.

[0036] The flexible straight-row fireproof cable of the embodiment can integrate a plurality of wire cores independently and straightly in one transmission assembly in the manufacturing process through the comprehensive structural design, reduce the material usage, avoid the deformation and stress caused by the twisting into a cable on the internal components, significantly improve the flexibility of the cable, ensure the high-temperature resistance and fireproof performance of the cable, and make the cable applicable to more narrow, complex and integrated lines.

[0037] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited thereto. Any changes or replacements within the technical range disclosed in the present application can be easily thought by those skilled in the art, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A flexible, straight-forward, fire resistant cable, characterized in that, The flexible straight-row fireproof cable comprises a straight-row frame, a plurality of fireproof power line cores, a plurality of fireproof control line cores, a filling layer, an isolation layer, an inner protective layer and an outer protective layer, the straight-row frame comprises an inner tube body, an outer tube body and a plurality of curved surface partition walls, the outer tube body is coaxially arranged outside the inner tube body, the overall curved surface partition wall in an inverse S shape is integrally connected with the inner tube body and the outer tube body in sequence, a partition cavity is formed between adjacent curved surface partition walls on the inner side of the inner tube body, the fireproof power line cores are flatly assembled between the adjacent curved surface partition walls one by one, and the plurality of fireproof control line cores are flatly assembled on the inner side of the inner tube body of the straight-row frame.

2. The flexible, straight-forward, fire resistant cable of claim 1, wherein, The curved surface partition wall comprises an inner end portion, a middle portion and an outer end portion which are integrally connected in sequence from inside to outside, the inner end portion is in a straight line type as a whole, the lower end of the middle portion is integrally connected with the inner end portion and is curved in a clockwise direction, and the lower end of the outer end portion is integrally connected with the middle portion and is curved in an anticlockwise direction.

3. The flexible, straight-forward, fire resistant cable of claim 1, wherein, The fireproof power line core comprises a power line core conductor and a shielding layer, a power inner insulation layer and a power outer insulation layer which are sequentially covered outside the power line core conductor from inside to outside.

4. The flexible, straight-forward, fire resistant cable of claim 1, wherein, The axis of the fireproof power line core is parallel to the axis of the inner tube body of the straight-row frame.

5. The flexible, straight-forward, fire resistant cable of claim 1, wherein, The fireproof power line core is flatly assembled in the gap cavity formed by the inner end portion of the curved surface partition wall, the middle portion of the adjacent curved surface partition wall and the outer tube body.

6. The flexible, straight-forward, fire resistant cable of claim 1, wherein, The fireproof control line core is arranged in the partition cavity on the inner side of the inner tube body as a group of two.

7. The flexible, straight-forward, fire resistant cable of claim 1, wherein, The axis of the fireproof control line core is parallel to the axis of the inner tube body of the straight-row frame.

8. The flexible, straight-forward, fire resistant cable of claim 1, wherein, The fireproof control line core comprises a control line core conductor and a control inner insulation layer and a control outer insulation layer which are sequentially covered outside the control line core conductor.

9. The flexible, straight-forward, fire resistant cable of claim 1, wherein, The filling layer is filled in the gap between the straight-row frame and the fireproof power line core.

10. The flexible, straight-forward, fire resistant cable of claim 1, wherein, The isolation layer, the inner protective layer and the outer protective layer are sequentially covered outside the filling layer from inside to outside.

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