Mineral fireproof power cable
By introducing spiral patterns, fixing and heat insulation mechanisms, and sliding isolation mechanisms into mineral fire-resistant cables, the problems of cable flexibility and bendability caused by sheath hardening are solved, thereby improving the cable's flexibility and heat resistance and extending its service life.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- XINGTAI XILONG CABLE CO LTD
- Filing Date
- 2025-07-08
- Publication Date
- 2026-07-14
AI Technical Summary
The sheath material of existing mineral fire-resistant cables hardens after mechanical deformation, affecting the cable's flexibility and bendability, which can easily lead to sheath breakage, causing short circuits or fires.
The design incorporates a sheath, including a spiral pattern, a fixing mechanism, a heat insulation mechanism, and a sliding isolation mechanism. The spiral pattern disperses stress, the heat insulation mechanism reduces thermal interference, and the sliding isolation mechanism provides heat insulation protection at bending positions. Composite mineral powder and silicone resin materials are used to enhance flexibility and heat resistance.
It improves the cable's flexibility and resistance to deformation, reduces thermal interference at bending points, extends the cable's service life, and reduces the risk of short circuits and fires.
Smart Images
Figure CN224501556U_ABST
Abstract
Description
Technical Field
[0001] The embodiments disclosed herein relate to the field of power cable technology, and more specifically, to a mineral-resistant fire-resistant power cable. Background Technology
[0002] Mineral-insulated power cables, also known as mineral-insulated cables, are cables with excellent fire resistance. They use highly conductive copper as the conductor, providing good electrical conductivity. The conductor is composed of high-temperature resistant, non-combustible inorganic minerals, such as magnesium oxide powder. The insulation layer has good insulation and fire resistance properties, and the sheath is generally made of copper or other metals and serves as a grounding layer.
[0003] While mineral-resistant fire-resistant cables can adapt to most scenarios, for some special applications, the sheath material not only needs to have good fire resistance, but also better mechanical properties, weather resistance, and environmental performance. For example, most sheath materials on the market are made of copper or other metals, and the sheath is made of copper strip longitudinally wrapped and welded with corrugated strips. After the copper strip undergoes mechanical deformation, the corrugated strips will harden and cannot be restored to flexibility through annealing, affecting the flexibility and bendability of the cable. Moreover, if it is too hard and forced to adjust, the cable sheath will break, exposing the conductor and insulation layer inside, which may cause short circuits or fires. Utility Model Content
[0004] To overcome the above-mentioned defects, the embodiments of this disclosure provide a mineral-resistant fireproof power cable, which solves the technical problem in the prior art that most cables on the market use copper strip longitudinally wrapped welding and corrugated, which causes the cable to harden and easily break after bending, resulting in short circuits.
[0005] According to one aspect, at least one embodiment of this disclosure provides a mineral-resistant fire-resistant power cable, including a conductor and an insulation layer, wherein the insulation layer is fixedly connected to the outer wall of the conductor, and further comprising:
[0006] A sheath, disposed on the outer wall of the insulating layer, is used for grounding;
[0007] The fixing mechanism is provided at both ends of the sheath;
[0008] The heat insulation mechanism is provided on the two fixing mechanisms, and the fixing mechanisms are used to fix the heat insulation mechanism to the sheath;
[0009] A sliding isolation mechanism is provided on the heat insulation mechanism, and the sliding isolation mechanism is used to protect the heat insulation mechanism.
[0010] Preferably, one end of the sheath has multiple mounting holes, and the insulating layer is fixedly connected to each mounting hole.
[0011] Preferably, the fixing mechanism includes:
[0012] The mounting grooves are provided on the outer walls of both ends of the sheath;
[0013] Mounting blocks, each of which is fixedly connected to the mounting block;
[0014] The fixing ring is fixedly connected between the plurality of mounting blocks at both ends.
[0015] Preferably, the heat insulation mechanism includes:
[0016] The heat insulation grooves are provided on the outer walls of both fixing rings;
[0017] Each heat insulation groove is fixedly connected to a heat insulation column.
[0018] The protective sheet is fixedly connected between the multiple heat insulation columns at both ends;
[0019] The heat insulation cotton is fixedly connected to the outer wall of the protective sheet;
[0020] A heat insulation pad is fixedly connected to the outer wall of the heat insulation cotton.
[0021] Preferably, the sliding isolation mechanism includes:
[0022] A plurality of heat insulation rings are slidably connected to the outer wall of the heat insulation pad;
[0023] A connecting post is connected to the outer wall of the heat insulation ring;
[0024] A retaining clip is threaded onto the inner wall of the connecting post.
[0025] Furthermore, the heat insulation ring is filled with composite mineral powder and organosilicon resin.
[0026] Furthermore, there is a gap between the protective sheet and the sheath.
[0027] Furthermore, the connecting post has a threaded line, and the fixing buckle has a threaded line that matches the connecting post.
[0028] Furthermore, the two ends of the insulating layer are respectively attached to the two ends of the sheath.
[0029] Furthermore, the outer wall of the sheath is provided with a spiral pattern.
[0030] The beneficial effects of the embodiments disclosed herein are as follows:
[0031] In this disclosure, when using mineral-resistant fire-resistant power cables, it is first necessary to determine the installation location and size of the cable, select a cable of appropriate size, install the heat insulation mechanism on the fixing mechanism, and then connect one end of the cable conductor to the required wiring position. Next, adjust the bending position. Since the bending position is prone to overheating and damage, slide the heat insulation mechanism to the bending position, stop at the bending point, and continue cable installation. Continue installation while checking the bending position, and slide the heat insulation mechanism to the bending point in the same way to insulate against external heat. Compared with existing technologies, adding a heat insulation mechanism can reduce the interference of external temperature on the internal sheath, insulation layer, and conductor, effectively improving the cable's service life. Moreover, the bending point of the cable is the most susceptible to heat damage, and adding a sliding heat insulation mechanism can reduce the external force on the bending point. Attached Figure Description
[0032] To more clearly illustrate the technical solutions in the embodiments of this disclosure, the accompanying drawings used in the description of the embodiments of this disclosure will be briefly introduced below. Obviously, the drawings described below are merely some exemplary embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on the content of the exemplary embodiments of this disclosure and these drawings without any creative effort.
[0033] Figure 1 This is a schematic diagram of the overall structure of a mineral fire-resistant power cable according to one embodiment of the present disclosure;
[0034] Figure 2 for Figure 1 A schematic diagram of the structure of the insulating layer, sheath, and spiral pattern in the embodiment;
[0035] Figure 3 for Figure 1 A schematic diagram of the structure of the conductor and insulating layer in the embodiment;
[0036] Figure 4 for Figure 1 A schematic diagram of the structure of the mounting groove, sheath and mounting port in the embodiment;
[0037] Figure 5 for Figure 1 A schematic diagram of the structure of the heat insulation ring and the connecting column in the embodiment;
[0038] Figure 6 for Figure 1 A schematic diagram of the fixing buckle in the embodiment;
[0039] Figure 7for Figure 1 The embodiment shows a schematic diagram of the structure of the protective sheet, heat insulation cotton and heat insulation pad.
[0040] In the diagram: 1. Conductor; 2. Insulation layer; 3. Sheath; 4. Mounting port; 5. Gap; 6. Thread; 7. Spiral pattern; 101. Mounting groove; 102. Mounting block; 103. Fixing ring; 201. Insulation groove; 202. Insulation column; 203. Protective sheet; 204. Insulation cotton; 205. Insulation pad; 301. Insulation ring; 302. Connecting column; 303. Fixing buckle. Detailed Implementation
[0041] The present disclosure will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present disclosure and are not intended to limit the scope of the disclosure.
[0042] To keep the drawings concise, each drawing only schematically shows the parts relevant to the disclosure; these do not represent the actual structure of the product. Furthermore, for ease of understanding, in some drawings, only one of components with the same structure or function is schematically shown, or only one is labeled. In this document, "one" not only means "only one," but can also mean "more than one," and "several" includes "two" and "more than two."
[0043] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linkage" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this disclosure based on the specific circumstances.
[0044] In this disclosure, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0045] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of description and simplification of operation, and are not intended to 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 this disclosure.
[0046] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.
[0047] like Figures 1-7 As shown, a mineral-resistant fireproof power cable according to an embodiment of the present disclosure includes a conductor 1 and an insulation layer 2. The insulation layer 2 is fixedly connected to the outer wall of the conductor 1. The cable also includes a sheath 3, a fixing mechanism, a heat insulation mechanism, and a sliding isolation mechanism. The sheath 3 is disposed on the outer wall of the insulation layer 2 and is used for grounding. Fixing mechanisms are provided at both ends of the sheath 3. Heat insulation mechanisms are provided on the two fixing mechanisms. The fixing mechanisms are used to fix the heat insulation mechanism to the sheath 3. Multiple sliding isolation mechanisms are provided on the heat insulation mechanism to protect the heat insulation mechanism. The two ends of the insulation layer 2 are respectively attached to the two ends of the sheath 3. Except for the two ends of the insulation layer 2, other positions of the insulation layer 2 are not attached to the sheath 3, which can effectively dissipate heat and avoid hardening due to excessive tightness.
[0048] In this embodiment, one end of the sheath 3 is provided with multiple mounting ports 4, and an insulating layer 2 is fixedly connected in each mounting port 4. The outer wall of the sheath 3 is provided with spiral patterns 7. The spiral patterns 7 form continuous spiral protrusions and grooves on the surface of the sheath 3. When subjected to force, the stress can be dispersed along the spiral patterns 7, avoiding stress concentration at a certain point or in a certain area. This makes it less likely for the material to undergo excessive local deformation or breakage when subjected to external force, thereby improving the overall flexibility and deformation resistance of the sheath 3.
[0049] In this embodiment, the fixing mechanism includes a mounting groove 101, a mounting block 102, and a fixing ring 103. Multiple mounting grooves 101 are provided on the outer walls of both ends of the sheath 3. Each mounting block 102 is fixedly connected to a mounting block 102, and a fixing ring 103 is fixedly connected between the multiple mounting blocks 102 at both ends.
[0050] In this embodiment, the heat insulation mechanism includes heat insulation grooves 201, heat insulation columns 202, protective sheets 203, and heat insulation pads 205. Multiple heat insulation grooves 201 are provided on the outer walls of the two fixing rings 103. Each heat insulation groove 201 is fixedly connected to a heat insulation column 202. Protective sheets 203 are fixedly connected between the multiple heat insulation columns 202 at both ends. Heat insulation cotton 204 is fixedly connected to the outer wall of the protective sheet 203. Heat insulation pads 205 are fixedly connected to the outer wall of the heat insulation cotton 204. There is a gap 5 between the protective sheet 203 and the sheath 3, which allows the sheath 3 to have some space when bending, avoiding direct contact and causing a harder state.
[0051] In this embodiment, the sliding isolation mechanism includes a heat insulation ring 301, a connecting post 302, and a fixing buckle 303. Multiple heat insulation rings 301 are slidably connected to the outer wall of the heat insulation pad 205. The connecting post 302 is connected to the outer wall of the heat insulation ring 301. The fixing buckle 303 is threaded to the inner wall of the connecting post 302. The heat insulation ring 301 is filled with composite mineral powder and organosilicon resin. The composite mineral powder and organosilicon resin have flexible fireproof properties and can effectively isolate high temperature. The connecting post 302 has a threaded line 6, and the fixing buckle 303 has a threaded line 6 that matches the connecting post 302. The fixing buckle 303 can be tightened on the connecting post 302. The composite mineral powder and organosilicon resin inside will not easily spill out. The connecting post 302 can also add composite mineral powder and organosilicon resin inside.
[0052] In this embodiment, when using mineral-resistant fire-resistant power cables, since most commercially available cables are relatively fragile and easily damaged after being heated and bent, the insulation layer 2 needs to be installed on the outside of the conductor 1 before installation. After determining the cable installation location, the insulation layer 2 can be passed through the installation opening 4 of the sheath 3 and installed inside the installation opening 4. Then, the mounting block 102 on the fixing ring 103 is installed in the installation groove 101. After all the fixing rings 103 at both ends are installed, the heat insulation column 202 on the protective plate 203 is installed in the heat insulation groove 201, and then the heat insulation pad 205 is installed. Installed on the outer wall of the protective plate 203, the conductor 1 at one end of the cable can then be connected to the required installation position. Subsequently, the cable is bent according to the actual needs. At the bending position, the heat insulation ring 301 needs to be slid to this position, and the cable is installed again. At each bending position, the heat insulation ring 301 is slid to this position for secondary heat insulation at the bending position. After complete installation, it can be used. After several years of use, the fixing buckle 303 can be unscrewed from the connecting post 302. Composite mineral powder and organic silicone resin are added to the inside of the heat insulation ring 301 to strengthen the heat insulation of the bending position and extend the service life of the cable.
[0053] It should be noted that the above embodiments are only used to illustrate the technical solutions of this disclosure and are not intended to limit it. Although this disclosure has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this disclosure without departing from the spirit and scope of the technical solutions of this disclosure, and all such modifications and substitutions should be covered within the scope of the claims of this disclosure.
Claims
1. A mineral-resistant fire-resistant power cable, comprising a conductor (1) and an insulation layer (2), wherein the insulation layer (2) is fixedly connected to the outer wall of the conductor (1), characterized in that, Also includes: Sheath (3), the sheath (3) is disposed on the outer wall of the insulating layer (2), the sheath (3) is used for grounding; The fixing mechanism is provided at both ends of the sheath (3); The heat insulation mechanism is provided on the two fixing mechanisms, and the fixing mechanisms are used to fix the heat insulation mechanism to the sheath (3); A sliding isolation mechanism is provided on the heat insulation mechanism, and the sliding isolation mechanism is used to protect the heat insulation mechanism.
2. The mineral-resistant fire-resistant power cable according to claim 1, characterized in that, The sheath (3) has multiple mounting ports (4) at one end, and the insulating layer (2) is fixedly connected in each mounting port (4).
3. The mineral-resistant fire-resistant power cable according to claim 2, characterized in that, The fixing mechanism includes: The mounting groove (101) is provided on the outer wall of both ends of the sheath (3). Mounting block (102), each of the mounting blocks (102) is fixedly connected to the mounting block (102); The fixing ring (103) is fixedly connected between the plurality of mounting blocks (102) at both ends.
4. A mineral-resistant fire-resistant power cable according to claim 3, characterized in that, The heat insulation mechanism includes: The heat insulation groove (201) is provided on the outer wall of both of the two fixing rings (103). Insulation column (202), each of the insulation grooves (201) is fixedly connected to the insulation column (202); The protective sheet (203) is fixedly connected between the multiple heat insulation columns (202) at both ends. Thermal insulation cotton (204) is fixedly connected to the outer wall of the protective sheet (203); The heat insulation pad (205) is fixedly connected to the outer wall of the heat insulation cotton (204).
5. A mineral-resistant fire-resistant power cable according to claim 4, characterized in that, The sliding isolation mechanism includes: Heat insulation ring (301), a plurality of heat insulation rings (301) are slidably connected to the outer wall of the heat insulation pad (205); The connecting post (302) is connected to the outer wall of the heat insulation ring (301); A retaining buckle (303) is threaded onto the inner wall of the connecting post (302).
6. A mineral-resistant fire-resistant power cable according to claim 5, characterized in that, The heat insulation ring (301) is filled with composite mineral powder and organosilicon resin.
7. A mineral-resistant fire-resistant power cable according to claim 6, characterized in that, There is a gap (5) between the protective sheet (203) and the sheath (3).
8. A mineral-resistant fire-resistant power cable according to claim 7, characterized in that, The connecting post (302) has a threaded line (6), and the fixing buckle (303) has a threaded line (6) that matches the connecting post (302).
9. A mineral-resistant fire-resistant power cable according to claim 8, characterized in that, The two ends of the insulating layer (2) are respectively attached to the two ends of the sheath (3).
10. A mineral-resistant fire-resistant power cable according to claim 9, characterized in that, The outer wall of the sheath (3) is provided with a spiral pattern (7).