High-temperature-resistant and sparkproof tensile cable for steel mill

Abstract

The utility model provides a high temperature resistant, sparkproof and tensile cable for a steel mill, which belongs to the technical field of cables, and comprises a cable core, a central filling body, three main cable cores, control cable cores and an instrument cable core, the three main cable cores are arranged at an interval of 120 degrees, two control cable cores and one instrument cable core are respectively arranged between two main cable cores, and the instrument cable core is arranged between the two main cable cores. The three main wire cores, the two control wire cores and the instrument wire core are stranded into a cable by taking the central filling body as a center; the inner sheath is extruded outside the cable core; the reinforcing layer is woven outside the inner sheath; the outer sheath is extruded outside the reinforcing layer; the glass fiber tape is wrapped outside the outer sheath; and the protective layer is woven outside the glass fiber tape. The cable has the characteristics of high temperature resistance, sparkproof performance and tensile strength, and is suitable for the production and use environment of a steel mill.

Description

Technical Field

[0001] The utility model relates to the technical field of cables, in particular to a high-temperature resistant, spark-proof and tensile-resistant cable for steel plants. Background Art

[0002] With the development of human society, the use of steel products has continued to expand, the use of steel has been further developed, and the processes such as steel reprocessing and smelting have also increased accordingly, and the demand for cables in steel mills has further expanded. Usually, processing occasions such as steel mills require cables to be resistant to high temperatures, so that they are suitable for high-temperature processing processes, have sufficient current-carrying capacity, and increase the length of time the cables can be used. Sparks will also be generated during the processing of steel mills. In view of the possibility of sparks flying, it is necessary to consider that the cables have mobile spark-proof properties. At the same time, the cable also needs to have a certain degree of flexibility, and a certain degree of bending performance is required for some mobile, small spaces or turns.

[0003] However, conventional power cables are generally only used for fixed laying and cannot meet the environment and usage of steel mills. Therefore, it is necessary to design a cable that is resistant to high temperatures, sparks, and tensile strength to suit the production and use environment of steel mills and improve production safety in steel mills. Utility Model Content

[0004] The utility model aims to overcome the defects of the prior art and provides a high temperature resistant spark proof tensile cable for steel mills, which has the characteristics of high temperature resistance, spark resistance and tensile resistance and is suitable for the production and use environment of steel mills.

[0005] In order to achieve the above purpose and other purposes, the utility model is implemented by including the following technical solutions: the utility model proposes a high-temperature resistant, spark-proof and tensile-resistant cable for steel mills, including a cable core, including a central filling body, a main line core, a control line core and an instrument line core, the three main line cores are arranged at intervals of 120°, the two control line cores and one instrument line core are respectively arranged between the two main line cores, the three main line cores, the two control line cores and one instrument line core are twisted into a cable with the central filling body as the center; the inner sheath is extruded outside the cable core; the reinforcement layer is woven outside the inner sheath; the outer sheath is extruded outside the reinforcement layer; the glass fiber tape is wrapped around the outer sheath; the protective layer is woven outside the glass fiber tape.

[0006] In one embodiment, the cross-section of the central filling body is a centrally symmetrical horseshoe shape with six concave arcs, a central traction rope is arranged in the center, and an aramid wire is arranged in each triangle.

[0007] In one embodiment, the main line core includes a first conductor and a first insulation layer arranged in sequence from the inside to the outside, and the first conductor is formed by composite twisting of multiple annealed bare copper wires; the first insulation layer is made of high-strength and high-tear resistance silicone rubber.

[0008] In one embodiment, a layer of polyester non-woven fabric is wrapped around the first conductor, the polyester surface of the polyester non-woven fabric faces inward, and the overlap rate is not less than 15%.

[0009] In one embodiment, the control wire core includes a first filling bar and a second conductor, the first filling bar is an aviation steel wire rope filling bar, and the second conductor is formed by composite twisting of multiple annealed bare copper wires; four second conductors are twisted into a cable with the first filling bar as the center.

[0010] In one embodiment, the instrument line core includes a second filling bar and a third conductor, the second filling bar is an aviation steel wire rope filling bar, and the third conductor is a twisted conductor; three third conductors are twisted into a cable with the second filling bar as the center.

[0011] In one embodiment, the cable core further comprises a reinforcing filler strip, which uses a plurality of aramid filaments as traction ropes and is extruded with rubber material, and the reinforcing filler strip is arranged between the gaps between the main core, the control core and the instrument core.

[0012] In one embodiment, after the cable core is cabled, it is wrapped with reinforced non-woven fabric, and the overlap rate is not less than 20%; the material of the inner sheath is a high-strength and high-tear-resistant silicone rubber sheath material; the braiding material of the reinforcement layer is aramid yarn, and the braiding density is not less than 50%; the material of the outer sheath is a high-temperature resistant CPE rubber mixture.

[0013] In one embodiment, the glass fiber tape is two layers of flame retardant spun-fire high-silica glass fiber tape, and the overlap rate is not less than 20%.

[0014] In one embodiment, the protective layer is a shielding protective net woven from tinned copper wires, with a weaving density of not less than 90%.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] 1. The overall structure of the cable core of the utility model is tightly symmetrical, which can effectively reduce the skin effect of the cable and increase the current carrying capacity of the cable; a layer of aramid fiber reinforcement layer is woven outside the inner sheath, and the weaving density is not less than 50%, so as to ensure that the overall tensile strength of the cable is strong in the harsh environment of the steel plant; a layer of high-temperature resistant CPE rubber mixture outer sheath is extruded outside the braided layer to ensure that the cable has certain wear resistance and bending performance; two layers of flame-retardant spun fire high-silica glass fiber tape are wrapped outside the outer sheath, and the overlap rate is not less than 20%, which can effectively prevent sparks in the steel plant from splashing on the cable surface and damaging the cable; a layer of shielding protection net is woven outside the glass fiber tape with tinned copper wire, and the weaving density is not less than 90%, which further strengthens the protection of the cable and ensures the continuity and safety of the cable operation;

[0017] 2. The design of adding aramid fibers in the triangle of the central filling body of the utility model can enhance the overall structural strength of the central filling body and improve its tensile performance;

[0018] 3. The conductor of the main core of the utility model is wrapped with a layer of polyester non-woven fabric, with the polyester facing inwards, and the overlap rate is not less than 15%, which can ensure a smaller bending degree of the cable and improve the conductive performance;

[0019] 4. The control wire core and instrument of the utility model are made of annealed bare copper wire with excellent conductivity, which is processed by twisting. During the twisting process, aramid wire is added to the center of the conductor to ensure that the small core conductor has sufficient tensile strength during use, thereby enhancing the safety of the conductor;

[0020] 5. The insulation layer of the utility model adopts high-strength and high-tear-resistant silicone rubber insulation, and its tensile strength can reach 8.0MPa and the elongation at break is 300%; at the same time, the high-tear-resistant silicone rubber insulation layer can ensure that the insulation will not easily crack and spread, which is very important to maintain the electrical insulation performance of the cable, ensure the safe operation of the cable under harsh conditions, and extend the service life of the cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 Shown is a schematic structural diagram of a high temperature resistant, spark proof and tensile cable for use in steel mills according to the utility model. DETAILED DESCRIPTION

[0022] See also Figure 1 The following describes the implementation of the present invention through specific examples. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0023] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings in this specification are only used to match the contents disclosed in the specification for the technical personnel in this field to understand and read, and are not used to limit the restrictive conditions for the implementation of the utility model. Therefore, they have no substantive technical significance. Any structural modification, change in proportional relationship or adjustment of size should still fall within the scope of the technical content disclosed by the utility model without affecting the effects and purposes that can be achieved by the utility model.

[0024] Unless otherwise defined, the technical or scientific terms used herein shall have the usual meanings as understood by a person with ordinary skills in the field to which the present invention belongs. The words "one", "an" or "the" and the like used in the present invention do not indicate a quantity limitation, but are only used to indicate the existence of at least one. The words "include" or "comprise" and the like mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects.

[0025] In order to avoid confusion with the present invention, some technical features known in the art are not described.

[0026] like Figure 1 As shown, this embodiment provides a high temperature resistant spark resistant tensile cable for use in steel mills, comprising a cable core 100, an inner sheath 200, a reinforcement layer 300, an outer sheath 400, a glass fiber tape 500 and a protective layer 600 arranged in sequence from the inside to the outside.

[0027] The cable core 100 includes a central filling body 110, a main core 120, a control core 130 and an instrument core 140. The three main cores 120 are arranged at intervals of 120°, and two control cores 130 and one instrument core 140 are respectively arranged between two main cores 10. The three main cores 120, the two control cores 130 and one instrument core 140 are twisted into a cable with the central filling body 110 as the center. The formed cable core 100 has a compact and symmetrical structure, which can effectively reduce the skin effect of the cable and increase the current carrying capacity of the cable.

[0028] The central filling body 110 uses an aviation steel wire rope as the central traction rope 111, and an aramid wire 112 is placed in each triangle, and then extruded with rubber material to form a centrally symmetrical horseshoe-shaped filling body with 6 concave arcs, and the curvature radius of each concave arc is equal to the diameter of the wire core placed on it. The design of adding the aramid wire 112 in the triangle can enhance the overall structural strength of the central filling body 110 and improve its tensile performance.

[0029] The main core 120 includes a first conductor 121 and a first insulating layer 122 arranged in sequence from the inside to the outside. The first conductor 121 is formed by composite twisting of multiple annealed bare copper wires with good conductivity and corrosion resistance. The composite twisting is first bundle twisting and then re-twisting. Specifically, a certain number of the annealed bare copper wires are first bundle twisted using a branching plate, and then re-twisted in the order of 1+6+12+18. The first insulating layer 122 is made of high-strength and high-tear silicone rubber, and its tensile strength can reach 8.0MPa and its elongation at break is 300%. The high-tear insulation layer can ensure that the insulation layer will not easily crack and spread, which is very important for maintaining the electrical insulation performance of the cable, ensuring the safe operation of the cable under harsh conditions and extending the service life of the cable. Furthermore, a layer of polyester non-woven fabric can be wrapped around the first conductor 121, and the polyester side of the polyester non-woven fabric faces inward, and the overlap rate is not less than 15%. This design can ensure that the cable has a small curvature and improve the conductivity.

[0030] The control core 130 includes a first filling strip 131 and a second conductor 132. The first filling strip 131 is an aviation steel wire rope filling strip. The second conductor 131 is formed by composite twisting of multiple annealed bare copper wires with excellent conductive properties. The composite twisting is first bundle twisted and then re-twisted. Specifically, a certain number of the annealed bare copper wires are first bundle twisted using a distribution board, and then re-twisted in the order of 1+6, and multiple aramid wires are added in the center during re-twisting to ensure that the small core conductor has sufficient tensile strength during use and enhance the safety of the conductor. An insulating layer is provided on the outside of the second conductor 132, and the insulating layer is made of high-strength and high-tear resistance silicone rubber. Four second conductors 132 are twisted into a cable with the first filling strip 131 as the center.

[0031] The instrument wire core 140 includes a second filler bar 141 and a third conductor 142. The second filler bar 141 is an aviation steel wire rope filler bar. The third conductor 142 is a twisted conductor. The first twisted conductor and the second twisted conductor are respectively twisted by a plurality of bare copper wire bundles. When the second twisted conductor is twisted, a plurality of aramid wires are added in the center to enhance the tensile strength of the conductor. An insulating layer is provided outside the third conductor 142. The insulating layer is made of high-strength and high-tear resistance silicone rubber. The three third conductors 142 are twisted into a cable with the second filler bar 141 as the center.

[0032] The cable core 100 may further include a reinforcing filling strip 150 , which uses a plurality of aramid filaments as traction ropes and is extruded with rubber material. The reinforcing filling strip 150 is arranged between the gaps between the main core 120 , the control core 130 and the instrument core 140 , which can further enhance the tensile strength of the cable core 100 .

[0033] After the cable core 100 is cabled, it is wrapped with reinforced non-woven fabric, with an overlap rate of not less than 20%; then a layer of the inner sheath 200 is extruded with a high-strength and high-tear resistance silicone rubber sheath material.

[0034] A reinforcement layer 300 is braided outside the inner sheath 200. The braiding material of the reinforcement layer 300 is aramid yarn, and the braiding density is not less than 50%, thereby ensuring that the overall tensile strength of the cable is strong in the harsh environment of the steel plant.

[0035] A layer of the outer sheath 400 is extruded outside the reinforcement layer 300. The material of the outer sheath 400 is a high temperature resistant CPE rubber mixture, which can ensure that the cable has certain wear resistance and bending performance.

[0036] The outer sheath 400 is wrapped with two layers of flame-retardant spun high-silica glass fiber tapes 500, with an overlap rate of not less than 20%, which can effectively prevent sparks in the steel plant from splashing on the cable surface and damaging the cable.

[0037] The protective layer 600 is arranged outside the glass fiber tape 500. The protective layer 600 is a shielding protective net woven with tinned copper wire, and the weaving density is not less than 90%, which can further enhance the protection of the cable and ensure the continuity and safety of the cable operation.

[0038] In summary, the utility model arranges and designs the tension wheel group on the basis of the existing technology, realizes uniform clamping of the soft cable and adjusts the dispersion force value through multiple tension wheels, can better adapt to the shape and deformation of the soft cable, provide a more stable clamping effect, avoids the problems of uneven clamping force and easy damage to the cable in the traditional clamping device, and improves the accuracy, safety and repeatability of the test. At the same time, the device has a simple structure and is easy to operate.

[0039] Therefore, the utility model effectively overcomes various shortcomings in the prior art and has a high industrial utilization value. The above embodiments are only illustrative of the principles and effects of the utility model, and are not used to limit the utility model. Anyone familiar with this technology can modify or change the above embodiments without violating the spirit and scope of the utility model. Therefore, all equivalent modifications or changes made by those with ordinary knowledge in the relevant technical field without departing from the spirit and technical ideas disclosed by the utility model should still be covered by the claims of the utility model.

Claims

1. A high temperature resistant spark resistant tensile cable for steel mills, characterized in that: include The cable core comprises a central filling body, a main core, a control core and an instrument core, wherein the three main cores are arranged at intervals of 120°, two control cores and one instrument core are arranged between two main cores respectively, and the three main cores, two control cores and one instrument core are twisted into a cable with the central filling body as the center; An inner sheath, extruded outside the cable core; A reinforcement layer, braided outside the inner sheath; An outer sheath, extruded outside the reinforcement layer; A glass fiber tape wrapped around the outer sheath; A protective layer is woven outside the glass fiber tape.

2. The high temperature resistant spark resistant tensile cable for steel mill according to claim 1, characterized in that: The cross section of the central filling body is a centrally symmetrical horseshoe shape with 6 concave arcs, a central traction rope is arranged in the center, and an aramid yarn is arranged in each triangle.

3. The high temperature resistant spark resistant tensile cable for steel mill according to claim 1, characterized in that: The main line core comprises a first conductor and a first insulating layer which are arranged in sequence from the inside to the outside. The first conductor is formed by composite twisting of a plurality of annealed bare copper wires. The first insulating layer is made of high-strength and high-tear resistance silicone rubber.

4. The high temperature resistant spark resistant tensile cable for steel mill according to claim 3, characterized in that: The first conductor is wrapped with a layer of polyester non-woven fabric, the polyester side of the polyester non-woven fabric faces inwards, and the overlap rate is not less than 15%.

5. The high temperature resistant spark resistant tensile cable for steel mill according to claim 1, characterized in that: The control core includes a first filling bar and a second conductor, wherein the first filling bar is an aviation steel wire rope filling bar, and the second conductor is formed by composite twisting of multiple annealed bare copper wires; four second conductors are twisted into a cable with the first filling bar as the center.

6. The high temperature resistant spark resistant tensile cable for steel mill according to claim 1, characterized in that: The instrument wire core comprises a second filling bar and a third conductor, wherein the second filling bar is an aviation steel wire rope filling bar, and the third conductor is a twisted conductor; The three third conductors are twisted into a cable with the second filling bar as the center.

7. The high temperature resistant spark resistant tensile cable for steel mill according to claim 1, characterized in that: The cable core also includes a reinforcing filling strip, which uses a plurality of aramid yarns as traction ropes and is extruded with rubber material. The reinforcing filling strip is arranged between the gaps between the main core, the control core and the instrument core.

8. The high temperature resistant spark resistant tensile cable for steel mill according to claim 1, characterized in that: After the cable core is cabled, it is wrapped with reinforced non-woven fabric, and the overlap rate is not less than 20%; the material of the inner sheath is a high-strength and high-tear-resistant silicone rubber sheath material; the braiding material of the reinforcement layer is aramid yarn, and the braiding density is not less than 50%; the material of the outer sheath is a high-temperature resistant CPE rubber mixture.

9. The high temperature resistant spark resistant tensile cable for steel mill according to claim 1, characterized in that: The glass fiber tape is a two-layer flame-retardant spun-fire high-silica glass fiber tape, and the overlap rate is not less than 20%.

10. The high temperature resistant spark resistant tensile cable for steel mill according to claim 1, characterized in that: The protective layer is a shielding protective net woven from tinned copper wires, with a weaving density of not less than 90%.

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