High temperature resistant power cable

Abstract

The utility model belongs to cable technical field, concretely is a kind of high temperature resistant power cable, including multiple wires, wire includes internal conductor and external insulating layer, support strip is equipped in cable, multiple wires are connected to support strip outside in the form that circumference equidistance distribution is presented, the wire groove is formed on the support strip, the opening for wire embedding is formed on the wire groove, and opening diameter is less than wire diameter;It can be understood that, the utility model realizes wire embedding automatic positioning by wire groove wrapping area more than half of wire, it is convenient to assemble;Utilize group reinforcing rib and positioning rib to enhance cable structure and prevent falling, improve integration and processing convenience;At the same time, the double-layer design of inner and outer sheath clamping armoring layer significantly improves the heat insulation and heat resistance performance, even if the outer sheath is damaged, the inner sheath can still ensure the stable operation of the wire at high temperature, and the armoring layer provides additional protection against cutting.

Description

Technical Field

[0001] This utility model belongs to the field of cable technology, and in particular relates to a high-temperature resistant power cable. Background Technology

[0002] High-temperature resistant power cables are special cables designed for extreme temperature environments. Their core characteristic is their ability to operate safely and stably under continuous or instantaneous temperatures far exceeding those of conventional cables. These cables typically utilize special high-temperature resistant insulation and sheathing materials (such as silicone rubber, fluoroplastics, mica tape, or ceramicized composite materials), allowing them to operate over a temperature range of 150°C to over 1000°C (depending on material grade and structure). They not only possess excellent electrical insulation and mechanical strength but also effectively resist thermal aging, oxidation, and chemical corrosion caused by high temperatures, ensuring reliable power transmission and equipment safety in harsh environments such as metallurgy, steel, glass manufacturing, chemical industry, aerospace, power plants, and fire emergency lines, where high temperatures, high heat radiation, or sudden fire hazards are present.

[0003] During the current cable manufacturing process, multiple conductors need to be squeezed together first, and then a filler layer is directly set on the outside. In this process, the conductors are not effectively restrained, resulting in the conductors not being evenly distributed in the cable after the filler layer is formed, which affects the cable performance and stability. Secondly, the reinforcing ribs located in the filler layer may also be misaligned, bent, or unevenly distributed, which affects the cable strength.

[0004] To address the aforementioned problems, this application proposes a high-temperature resistant power cable. Utility Model Content

[0005] The purpose of this invention is to provide a high-temperature resistant power cable, which solves the problems mentioned in the background art.

[0006] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0007] This utility model relates to a high-temperature resistant power cable, comprising multiple conductors, each conductor having an inner conductor and an outer insulation layer. A support strip is provided inside the cable, and the multiple conductors are circumferentially distributed and connected to the outside of the support strip. A groove is formed on the support strip, and an opening for inserting the conductor is formed on the groove, the diameter of which is smaller than the diameter of the conductor.

[0008] Furthermore, the support bar is provided with reinforcing ribs on its exterior. The reinforcing ribs are formed by two ribs per group, and there are several groups arranged in a circle. The reinforcing ribs are located between two adjacent conductors.

[0009] Furthermore, the wire grooves are a number of circumferentially equidistant grooves, the same number as the wires, and a rib is formed between two adjacent wire grooves located outside the support bar. The rib is formed with a groove that can accommodate two reinforcing ribs at the same time.

[0010] Furthermore, the groove is formed with positioning ribs to position the reinforcing ribs.

[0011] Furthermore, the support bar and the conductor are formed with a filling layer on the outside, the filling layer is extruded and covered with an inner sheath, the inner sheath is provided with an armor layer on the outside, and the armor layer is extruded and covered with an outer sheath.

[0012] Furthermore, the insulating layer is made of polyetheretherketone and is extruded and coated onto the outside of the conductor, and the support strip is made of silicone rubber.

[0013] Furthermore, the inner sheath is a low-smoke halogen-free polyolefin molded component, and the outer sheath is a fluororubber molded component.

[0014] This utility model has the following beneficial effects:

[0015] This utility model can automatically position the wire after it is embedded by setting a groove with a wrapping area greater than half of the wire, which facilitates assembly; by setting two sets of reinforcing ribs, it can strengthen the structure inside the cable, and the positioning ribs can also prevent the reinforcing ribs from falling off, improve the structural integration, and facilitate production and processing.

[0016] This invention features an inner sheath located inside the armor layer and an outer sheath located outside the armor layer. This double-layer structure provides better heat insulation and heat resistance. At the same time, the armor layer also provides cut protection. Even if the outer sheath is damaged, the inner sheath can still provide good high-temperature resistance and heat insulation, ensuring stable operation of the conductor.

[0017] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the overall appearance structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the cable cross-section;

[0021] Figure 3 A schematic diagram of the structure in which the conductor and reinforcing ribs are installed in the support strip;

[0022] Figure 4 This is a partially enlarged structural diagram of the support bar;

[0023] The attached diagram lists the components represented by each number as follows:

[0024] In the diagram: 1. Conductor; 2. Insulation layer; 3. Support strip; 31. Trough; 32. Raised rib; 33. Rib groove; 331. Positioning rib; 4. Reinforcing rib; 5. Filling layer; 6. Inner sheath; 7. Armor layer; 8. Outer sheath. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] In the description of this utility model, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inner", "around" and other terms indicating orientation or positional relationship are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the components or elements 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 of this utility model.

[0027] Please see Figure 1 - Figure 4 As shown, this utility model is a high-temperature resistant power cable, including multiple conductors, each conductor including an inner conductor 1 and an outer insulation layer 2. The cable is provided with a support strip 3. The multiple conductors are connected to the outside of the support strip 3 in a circumferentially equidistant distribution. The support strip 3 is formed with a wire groove 31, and the wire groove 31 is formed with an opening for the conductor to be inserted, and the diameter of the opening is smaller than the diameter of the conductor.

[0028] Specifically, the support bar 3 is provided with a reinforcing rib 4 on the outside. The reinforcing rib 4 is formed by two ribs forming a group, and there are several groups arranged in a circle. The reinforcing rib 4 is located between two adjacent conductors.

[0029] Specifically, the wire grooves 31 are a number of circumferentially spaced ones, which are the same as the number of wires. A rib 32 is formed between two adjacent wire grooves 31, located outside the support bar 3. The rib 32 is formed with a groove 33 that can accommodate two reinforcing ribs 4 at the same time.

[0030] Specifically, the groove 33 is formed with positioning ribs 331 to position the reinforcing ribs 4. In this embodiment, each groove 33 is formed with two symmetrical sets of positioning ribs 331, one set located at the opening of the groove 33 and the other set located in the middle, which are used to position the two reinforcing ribs 4 respectively.

[0031] Specifically, the support bar 3 and the conductor are formed with a filling layer 5, the filling layer 5 is extruded and encapsulated with an inner sheath 6, the inner sheath 6 is provided with an armor layer 7, and the armor layer 7 is extruded and encapsulated with an outer sheath 8.

[0032] In this embodiment, an inner sheath 6 and an outer sheath 8 are respectively provided inside and outside the armor layer 7 to form a double-layer structure, which not only enhances the heat insulation and heat resistance performance, but also provides cut protection for the armor layer 7; even if the outer sheath 8 is damaged, the inner sheath 6 can still ensure the high temperature resistance and heat insulation effect of the cable, and ensure the stable operation of the conductor.

[0033] Specifically, the insulation layer 2 is made of polyetheretherketone and extruded and coated onto the outside of the conductor 1. It can withstand temperatures up to 250°C and has high insulation strength. The support strip 3 is made of silicone rubber. Silicone rubber has excellent high and low temperature resistance, excellent and stable electrical properties, is very soft, physiologically inert, and has good flame retardancy.

[0034] Specifically, the inner sheath 6 is a low-smoke, halogen-free polyolefin molded component, which improves mechanical protection capabilities; the outer sheath 8 can be made of fluororubber or polyimide material, which has excellent wear resistance, corrosion resistance and weather resistance.

[0035] Understandably, this utility model achieves automatic positioning of the wire by wrapping a groove with an area exceeding half that of the wire, which facilitates assembly; it uses grouped reinforcing ribs and positioning ribs to enhance the cable structure and prevent detachment, thereby improving integration and processing convenience; at the same time, it adopts a double-layer design with inner and outer sheaths holding the armor layer, which significantly improves the heat insulation and heat resistance performance. Even if the outer sheath is damaged, the inner sheath can still ensure that the wire operates stably at high temperatures, while the armor layer provides additional cut protection.

[0036] One specific application of this embodiment is as follows: the support bar 3 is formed by extrusion molding using an extrusion device. During extrusion, the groove 31, the rib 32, the rib groove 33, and the positioning rib 331 are formed simultaneously. The opening width of the groove 31 is smaller than the diameter of the conductor cross section, and the distance between the symmetrical positioning ribs 331 is smaller than the diameter of a single reinforcing rib 4. The insulation layer 2 is made of modified fluoroplastic or polyether ether ketone (PEEK) material and is formed by extrusion coating process to form a conductor with the outside of the conductor 1.

[0037] During assembly, if Figure 3As shown, the wire is embedded in the wire groove 31, which prevents the wire from detaching under the action of the wire groove 31. The reinforcing rib 4 is embedded in the rib groove 33 and achieves the purpose of preventing detachment under the action of the positioning rib 331. The engagement of the wire and the reinforcing rib 4 with the support strip 3 serves the purpose of facilitating assembly and quick integration.

[0038] exist Figure 3 The outer filler layer 5 shown ensures the roundness of the cable. The inner sheath 6 is made of low-smoke halogen-free polyolefin material and is formed outside the filler layer 5 through an extrusion coating process. The armor layer 7 is made of stainless steel wire braid or steel strip armor and is formed outside the inner sheath 6. The outer sheath 8 is made of fluororubber or polyimide material and is formed outside the armor layer 7 through an extrusion coating process.

[0039] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0040] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A high-temperature resistant power cable, comprising multiple conductors, each conductor including an inner conductor (1) and an outer insulation layer (2), characterized in that: The cable is provided with a support bar (3), and multiple conductors are connected to the outside of the support bar (3) in a circumferentially equidistant manner. The support bar (3) has a wire groove (31) formed on it, and the wire groove (31) has an opening for the conductor to be inserted, and the diameter of the opening is smaller than the diameter of the conductor.

2. The high-temperature resistant power cable according to claim 1, characterized in that: The support bar (3) is provided with reinforcing ribs (4) on the outside. The reinforcing ribs (4) are formed by two ribs forming a group, and there are several groups arranged in a circle. The reinforcing ribs (4) are located between two adjacent conductors.

3. The high-temperature resistant power cable according to claim 1, characterized in that: The wire groove (31) is a number of circumferentially spaced wires with the same number of wires. A rib (32) is formed between two adjacent wire grooves (31) on the outside of the support bar (3). The rib (32) has a groove (33) that can accommodate two reinforcing ribs (4) at the same time.

4. A high-temperature resistant power cable according to claim 3, characterized in that: The groove (33) is formed with a positioning rib (331) for positioning the reinforcing rib (4).

5. A high-temperature resistant power cable according to claim 1, characterized in that: The support bar (3) and the conductor are formed with a filling layer (5). The filling layer (5) is extruded and covered with an inner sheath (6). The inner sheath (6) is provided with an armor layer (7). The armor layer (7) is extruded and covered with an outer sheath (8).

6. A high-temperature resistant power cable according to claim 1, characterized in that: The insulating layer (2) is made of polyetheretherketone and extruded overmolded onto the outside of the conductor (1), and the support strip (3) is made of silicone rubber.

7. A high-temperature resistant power cable according to claim 5, characterized in that: The inner sheath (6) is a low-smoke halogen-free polyolefin molded component, and the outer sheath (8) is a fluororubber molded component.

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