Cable for heliostat motor of photo-thermal power station

Abstract

The utility model discloses a cable for a heliostat motor of a photo-thermal power station. The cable comprises a cable core, and a filling layer, a wrapping layer, a lining layer, an armor layer and a sheath layer which are sequentially arranged outside the cable core from inside to outside, the cable core is formed by twisting a plurality of insulating wire cores, and each insulating wire core comprises a conductor formed by twisting a plurality of strands of soft copper wires and a cold-resistant insulating layer wrapping the conductor; gaps among the insulating wire cores are filled with non-hygroscopic filling ropes to serve as a filling layer; the wrapping layer is made of a non-hygroscopic wrapping tape and wraps the cable core; the inner lining layer is extruded outside the wrapping layer; the armor layer is wrapped outside the lining layer; and the sheath layer is a TPU sheath layer extruded outside the armor layer. The flexible cable has the advantages of good bending performance, better tensile strength and stretch rate, excellent wear resistance, torsion resistance, cold resistance, high temperature resistance and ozone resistance, can adapt to the environment with high altitude and large day and night temperature difference, and can effectively ensure the service life at the same time.

Description

Technical Field

[0001] The utility model relates to the field of cables, in particular to a cable for a heliostat motor of a photothermal power station. Background Art

[0002] Solar thermal power stations are generally built at high altitudes, in uninhabited Gobi deserts, with large temperature differences between day and night and harsh environments. At the same time, since the heliostat operates in a cycle of one day and night, the motor cable also rotates with the solar thermal heliostat motor, with a maximum left and right angle of 180°, and a rotation of 90° up and down, a service life of 30 years, and a rotation design of 8,000 times. Therefore, in order to adapt to the environment of high altitude and large temperature difference between day and night, the cables used for the heliostat motors of solar thermal power stations should have reliable ozone resistance, cold resistance, high temperature resistance and other characteristics. In order to ensure the service life of the motor cable, the cables used for the heliostat motors of solar thermal power stations should also have the characteristics of wear resistance and torsion resistance. Summary of the invention

[0003] The utility model aims to provide a cable for a heliostat motor of a photothermal power station that is wear-resistant, torsion-resistant, ozone-resistant, cold-resistant and high-temperature-resistant in view of the deficiencies in the prior art.

[0004] The technical purpose of the utility model is achieved through the following technical solutions:

[0005] A cable for a heliostat motor in a solar thermal power station comprises a cable core and a non-hygroscopic filling layer, a wrapping layer, an inner lining layer, an armor layer and a sheath layer which are sequentially arranged outside the cable core from the inside to the outside; the cable core is formed by twisting a plurality of insulating cores, the insulating core comprising a conductor formed by twisting a plurality of soft copper wires and a cold-resistant insulating layer wrapped around the conductor; the gaps between the insulating cores are filled with a non-hygroscopic filling rope as a filling layer; the wrapping layer is made of a non-hygroscopic tape, which is wrapped around the cable core; the inner lining layer is extruded outside the wrapping layer; the armor layer is wrapped outside the inner lining layer; the sheath layer is a TPU sheath layer extruded outside the armor layer.

[0006] The cold-resistant insulating layer is made of cold-resistant PVC insulating material.

[0007] The non-hygroscopic wrapping tape is a non-woven wrapping tape.

[0008] The inner lining layer is a cross-linked polyethylene inner lining layer extruded outside the wrapping layer.

[0009] The armor layer is made of galvanized steel strip.

[0010] The non-hygroscopic filling rope is a PP mesh filling rope.

[0011] The conductor is a fifth type soft copper conductor.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] 1. The utility model has good bending performance, good tensile strength and elongation, excellent wear resistance, torsion resistance, cold resistance, high temperature resistance and ozone resistance. It can adapt to environments with high altitudes and large temperature differences between day and night, and can effectively ensure its service life.

[0014] 2. The wrapping layer of the utility model is made of non-hygroscopic wrapping tape, which is wrapped around the cable core. In actual use, the non-hygroscopic wrapping tape is a non-woven wrapping tape. This technical measure ensures that the cable core is tight and not loose, and at the same time, the density is low, which can effectively reduce the weight of the cable itself and reduce the load on the cable.

[0015] 3. The non-hygroscopic filling rope of the utility model adopts PP mesh filling rope, which is woven from polypropylene mesh torn fibers and has good heat shrinkage performance. At the same time, it also has excellent softness, light weight, non-hygroscopic material, strength is not affected by moisture, high tensile strength, good acid and alkali resistance and mildew resistance, good high-frequency insulation performance, voltage resistance, non-toxic and environmentally friendly. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the utility model;

[0017] Figure numerals: 1—insulated core; 11—conductor; 12—cold-resistant insulation layer; 2—non-hygroscopic filling layer; 3—wrapping layer; 4—lining layer; 5—armor layer; 6—sheath layer. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0019] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings. In addition, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0021] like Figure 1 As shown, a cable for a heliostat motor of a solar thermal power station comprises a cable core and a non-hygroscopic filling layer 2, a wrapping layer 3, an inner lining layer 4, an armor layer 5 and a sheath layer 6 which are sequentially arranged outside the cable core from the inside to the outside; the cable core is formed by twisting a plurality of insulating cores 1, and the insulating core 1 comprises a conductor 11 formed by twisting a plurality of soft copper wires and a cold-resistant insulating layer 12 wrapped outside the conductor 11; the gaps between the insulating cores 1 are filled with a non-hygroscopic filling rope as the filling layer 2; the wrapping layer 3 is made of a non-hygroscopic tape, which is wrapped outside the cable core;

[0022] The inner lining layer 4 is extruded outside the wrapping layer 3 ; the armor layer 5 is wrapped outside the inner lining layer 4 ; and the sheath layer 6 is a TPU sheath layer 6 extruded outside the armor layer 5 .

[0023] Specifically, the cable core is formed by twisting three insulating cores 1. In actual use, the number of insulating cores 1 is increased or decreased according to actual conditions.

[0024] The insulated wire core 1 comprises a conductor 11 formed by twisting multiple strands of soft copper wires and a cold-resistant insulating layer 12 wrapped around the conductor 11. In actual use, the conductor 11 is formed by twisting multiple strands of soft copper wires, specifically a fifth type of soft copper conductor, which has good softness and bending properties by adopting this technical measure.

[0025] The cold-resistant insulating layer 12 is made of cold-resistant PVC insulation material, which has good cold-resistant and aging-resistant properties. The soft cold-resistant PVC has a suitable fixed working temperature of -52 to 105°C and a mobile working temperature of -40 to 105°C, and the PVC material can still remain soft at low temperatures (the hardness increases by 10% at -40°C).

[0026] The wrapping layer 3 is made of non-hygroscopic tape, which is wrapped around the cable core. In actual use, the non-hygroscopic tape is a non-woven fabric wrapping tape. This technical measure ensures that the cable core is tight and not loose, and at the same time, the density is low, which can effectively reduce the weight of the cable itself and reduce the load of the cable.

[0027] The gaps between the insulating wire cores 1 are filled with non-hygroscopic filling ropes as the filling layer 2. In actual use, the non-hygroscopic filling ropes are PP mesh filling ropes, which are woven from polypropylene mesh tear fibers and have good heat shrinkage properties. At the same time, they also have excellent softness, light weight, non-hygroscopic materials, strength that is not affected by moisture, high tensile strength, good acid and alkali resistance and mildew resistance, good high-frequency insulation performance, voltage resistance, and non-toxic and environmentally friendly.

[0028] The inner lining layer 4 is a cross-linked polyethylene inner lining layer 4 extruded outside the wrapping layer 3. Cross-linked polyethylene has the following advantages: Heat resistance: XLPE with a three-dimensional mesh structure has excellent heat resistance. It will not decompose or carbonize below 200°C, the long-term working temperature can reach 90°C, and the thermal life can reach 40 years. Insulation performance: XLPE maintains the original good insulation properties of PE, and the insulation resistance is further increased. Its dielectric loss tangent is very small and is not greatly affected by temperature. Mechanical properties: Due to the establishment of new chemical bonds between macromolecules, the hardness, stiffness, wear resistance and impact resistance of XLPE are improved, thereby making up for the disadvantage that PE is easily cracked by environmental stress. Chemical resistance: XLPE has strong acid and alkali resistance and oil resistance, and its combustion products are mainly water and carbon dioxide, which has little harm to the environment and meets the requirements of modern fire safety. The use of this technical measure increases the heat resistance, creep resistance, tear resistance, notch cracking resistance, flame retardancy and other properties of wires and cables, while also having excellent environmental protection properties.

[0029] The armor layer 5 is made of galvanized steel strip. With this technical measure, it has good wear resistance, impact resistance, corrosion resistance and heat insulation and flame retardant properties.

[0030] The sheath layer 6 is a TPU sheath layer 6 extruded outside the armor layer 5. TPU has excellent wear resistance, which is more than five times that of natural rubber. At the same time, TPU also has excellent tensile properties, tearing properties, bending properties, ozone resistance, high temperature resistance, oxidation resistance and low temperature performance. TPU can be made of German BASF C70AWH TPU; TPU can be made of TPU in "TPU / SEBS thermoplastic elastomer insulation material for power cable and preparation method thereof" (Announcement No. CN103122138B, announcement date January 20, 2016). TPU products can maintain excellent bending resistance in different environments. General plastic raw materials are easily oxidized in an environment above 70°C for a long time, and TPU has good antioxidant ability; generally speaking, TPU has a temperature resistance of up to 120°C. TPU has very good low temperature resistance, usually reaching -50°C. The use of this technical measure has better tensile strength and elongation, and has excellent wear resistance, torsion resistance, cold resistance, high temperature resistance and ozone resistance. It can adapt to environments with high altitudes and large temperature differences between day and night, and can effectively ensure its service life.

[0031] The technical solutions provided by the embodiments of the present invention are introduced in detail above. Specific examples are used in this article to illustrate the principles and implementation methods of the embodiments of the present invention. The description of the above embodiments is only applicable to help understand the principles of the embodiments of the present invention. At the same time, for those skilled in the art, according to the embodiments of the present invention, there will be changes in the specific implementation methods and application scopes. In summary, the content of this specification should not be understood as a limitation on the present invention.

Claims

1. A cable for a heliostat motor in a solar thermal power station, characterized in that: It includes a cable core and a filling layer, a wrapping layer, an inner lining layer, an armor layer and a sheath layer which are arranged outside the cable core in sequence from the inside to the outside; The cable core is formed by twisting a plurality of insulating wire cores, wherein the insulating wire core comprises a conductor formed by twisting a plurality of soft copper wires and a cold-resistant insulating layer wrapped around the conductor; the cold-resistant insulating layer is made of cold-resistant PVC insulating material; The gaps between the insulating cores are filled with non-hygroscopic filling ropes as a filling layer; the non-hygroscopic filling ropes are PP mesh filling ropes; The wrapping layer is made of a non-hygroscopic wrapping tape, which is wrapped around the cable core; the non-hygroscopic wrapping tape is a non-woven wrapping tape; The inner lining layer is extruded outside the wrapping layer; the armor layer is wrapped outside the inner lining layer; and the sheath layer is a TPU sheath layer extruded outside the armor layer.

2. The cable for heliostat motor of a solar thermal power station according to claim 1, characterized in that: The inner lining layer is a cross-linked polyethylene inner lining layer extruded outside the wrapping layer.

3. The cable for heliostat motor of a solar thermal power station according to claim 1, characterized in that: The armor layer is made of galvanized steel strip.

4. The cable for heliostat motor of a solar thermal power station according to claim 1, characterized in that: The conductor is a fifth type soft copper conductor.

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