Low-temperature-resistant cable

Abstract

The utility model discloses a low temperature resistant cable, relates to the cable technology field, and comprises an inner sleeve layer, the inner sleeve layer is internally provided with a plurality of wire bodies, each wire body comprises a wire core, an insulating layer and a shielding layer which are distributed in sequence from inside to outside, a filling cavity is arranged between the inner sleeve layer and the plurality of wire bodies, and the filling cavity is filled with asbestos; the middle sleeve layer is arranged on the outer surface of the inner sleeve layer, the middle sleeve layer comprises a flexible ABS (Acrylonitrile Butadiene Styrene) plastic sleeve, and glass fiber gridding cloth is arranged in the flexible ABS plastic sleeve; the outer sleeve layer is arranged on the middle sleeve layer, and a compression-resistant layer is arranged between the outer sleeve layer and the middle sleeve layer; according to the cable, the flexible ABS plastic sleeve is matched with the inner sleeve layer and the asbestos to wrap the wire body in a double-layer mode, the low temperature resistance of the cable is ensured, meanwhile, the flexible ABS plastic has the excellent mechanical property, the impact strength of the flexible ABS plastic is extremely good, the flexible ABS plastic can be used at the extremely low temperature and used for improving the overall low temperature resistance of the cable, and the glass fiber gridding cloth is matched, so that the service life of the cable is prolonged. Good compression resistance and crack resistance are realized.

Description

Technical Field

[0001] The present application relates to the field of cable technology, and in particular to low-temperature resistant cables. Background Art

[0002] Cable is a wire made of one or more mutually insulated conductors and an outer insulating protective layer, laid underground or in the air, etc. The cable has the characteristics of internal electricity and external insulation;

[0003] Cables are widely used in various industries and have multiple properties. For some cables in low-temperature environments, such as underground cables buried in areas with harsh climatic conditions in northern my country, the cable materials are required to have good low-temperature resistance and anti-cracking and impact resistance. The outer sheath of existing low-temperature resistant cables generally uses low-temperature resistant materials. Although they can effectively play a role in low-temperature resistance, their compression and cracking resistance are poor. The outer sheath layer is easily cracked and damaged under pressure, which affects the working stability of the cable and creates unsafe factors. Therefore, the present application proposes a low-temperature resistant cable. Utility Model Content

[0004] The purpose of the present application is to solve the problems in the above-mentioned background technology and provide a low-temperature resistant cable.

[0005] In order to achieve the above-mentioned purpose, this application specifically adopts the following technical solutions:

[0006] Low temperature resistant cables, including:

[0007] An inner jacket layer, wherein a plurality of wire bodies are arranged in the inner jacket layer, wherein the wire bodies include a wire core, an insulating layer and a shielding layer which are sequentially distributed from the inside to the outside, and a filling cavity is provided between the inner jacket layer and the plurality of wire bodies, wherein the filling cavity is filled with asbestos;

[0008] A middle jacket layer is arranged on the outer surface of the inner jacket layer, wherein the middle jacket layer comprises a flexible ABS plastic jacket, and a glass fiber mesh cloth is arranged inside the flexible ABS plastic jacket;

[0009] The outer jacket layer is arranged on the middle jacket layer, and a pressure-resistant layer is arranged between the outer jacket layer and the middle jacket layer.

[0010] Furthermore, the compression-resistant layer comprises a spiral steel sheet, and the spiral steel sheet is spirally wound on the middle jacket layer.

[0011] Furthermore, the number of the spiral steel sheets is two, and the two spiral steel sheets are arranged inside and outside and have opposite spiral directions.

[0012] Furthermore, a spacer is provided between the two spiral steel sheets.

[0013] Furthermore, the inner and outer side walls of the spacer are both provided with spiral grooves, and two spiral steel sheets are respectively embedded in the two spiral grooves.

[0014] Furthermore, a protective sleeve is provided between the middle sleeve layer and the pressure-resistant layer.

[0015] Furthermore, a tensile rod is coaxially arranged in the inner sleeve layer, and a plurality of support plates are arranged in an array on the outer surface of the tensile rod. The free ends of the plurality of support plates are respectively overlapped with the inner wall of the inner sleeve layer, and a cavity is formed between two adjacent support plates. The plurality of wire bodies are respectively located in the plurality of cavity.

[0016] Furthermore, a free end of the support plate is provided with an arc-shaped stopper, and the arc-shaped stopper is in contact and overlapped with the inner wall of the inner sleeve layer.

[0017] The beneficial effects of the present application are as follows: In the present application, the low temperature resistance of the cable is ensured by a flexible ABS plastic sheath, in combination with an inner sheath and asbestos double-layer wrapping of the wire body. At the same time, the flexible ABS plastic has excellent mechanical properties and excellent impact strength and can be used at extremely low temperatures. It is not only used to improve the overall low temperature resistance of the cable, but also has good compression and crack resistance when combined with glass fiber mesh cloth. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a three-dimensional structural diagram of this application;

[0019] Figure 2 It is a sectional view of the three-dimensional structure of the present application;

[0020] Figure 3 It is an exploded view of the three-dimensional structure of the jacket in this application;

[0021] Figure 4 This is an exploded view of the three-dimensional structure of the pressure-resistant layer of the present application;

[0022] Figure 5 This application Figure 2 Enlarged view of point A in the middle;

[0023] Figure numerals: 1, inner sleeve; 2, wire body; 3, asbestos; 4, middle sleeve; 5, outer sleeve; 6, pressure-resistant layer; 7, spacer; 8, spiral groove; 9, protective sleeve; 10, tension rod; 11, support plate; 12, arc-shaped block; 201, wire core; 202, insulation layer; 203, shielding layer; 401, flexible ABS plastic sleeve; 402, glass fiber mesh cloth; 601, spiral steel sheet. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application.

[0025] like Figure 1-Figure 5As shown, a low temperature resistant cable proposed in one embodiment of the present application includes:

[0026] An inner jacket 1, in which a plurality of wire bodies 2 are arranged, the wire bodies 2 include a wire core 201, an insulating layer 202 and a shielding layer 203 which are sequentially distributed from the inside to the outside, the wire core 201 is used to transmit current, the insulating layer 202 is used to insulate to prevent current leakage, the shielding layer 203 is used to shield the magnetic field to ensure current transmission, a filling cavity is provided between the inner jacket 1 and the plurality of wire bodies 2, the filling cavity is filled with asbestos 3, the inner jacket 1 is used to wrap and bind the plurality of wire bodies 2 to prevent them from being loose, the asbestos 3 has high fire resistance, electrical insulation and thermal insulation, and is an important fireproof, insulating and heat-insulating material, and the low-temperature resistance of the cable is improved by filling the filling cavity with asbestos 3 and wrapping the plurality of wire bodies 2;

[0027] The middle jacket layer 4 is arranged on the outer surface of the inner jacket layer 1. The middle jacket layer 4 includes a flexible ABS plastic jacket 401. A glass fiber mesh cloth 402 is arranged inside the flexible ABS plastic jacket 401. The flexible ABS plastic has excellent mechanical properties and excellent impact strength. It can be used at extremely low temperatures. It is not only used to improve the overall low-temperature resistance of the cable, but also to improve the compression resistance of the cable. The glass fiber mesh cloth 402 is based on glass fiber woven fabric and is soaked in a polymer anti-emulsion coating, so that it has good alkali resistance, flexibility and high tensile strength in warp and weft directions. By arranging the glass fiber mesh cloth 402 in the flexible ABS plastic jacket 401, when the cable is compressed, the stress will be transmitted to the flexible ABS plastic jacket 401. The glass fiber mesh cloth 402 is used to enhance the crack resistance of the flexible ABS plastic jacket 401, thereby ensuring low-temperature protection for the cable.

[0028] The outer jacket layer 5 is arranged on the middle jacket layer 4, and a pressure-resistant layer 6 is arranged between the outer jacket layer 5 and the middle jacket layer 4. The outer jacket layer 5 is used to protect the outer surface of the cable. The pressure-resistant layer 6 can further buffer and protect the external pressure, thereby improving the overall pressure resistance of the cable and ensuring its low temperature resistance.

[0029] The overall structure of the cable is that the inner sheath 1 wraps the multiple wires 2, and the wires 2 are double-protected by asbestos 3 and flexible ABS plastic sheath 401, and the pressure-resistant layer 6 makes the cable as a whole have the characteristics of being able to work stably in low-temperature and harsh climate environments, and having good low-temperature resistance, pressure resistance and crack resistance.

[0030] like Figure 4As shown, in some embodiments, the compression-resistant layer 6 includes a spiral steel sheet 601, which is spirally wound on the middle jacket layer 4. When the cable as a whole is under pressure, the pressure will be transmitted to the spiral steel sheet 601. Since the spiral steel sheet 601 is spirally wound and affected by the extrusion force, the spiral structure of the spiral steel sheet 601 will produce annular tensile stress, thereby sharing the pressure at the pressure point and improving the compression resistance of the cable.

[0031] like Figure 4 As shown, in some embodiments, the number of spiral steel sheets 601 is two, and the two spiral steel sheets 601 are arranged inside and outside and have opposite spiral rotation directions. The rotation directions of the two spiral steel sheets 601 are opposite, so that when the cable is compressed, the two spiral steel sheets 601 respectively generate two opposite annular tensile stresses, and the two opposite forces will improve the compression resistance of the cable and further improve the protection effect of the cable.

[0032] like Figure 4 As shown, in some embodiments, a spacer sleeve 7 is arranged between two spiral steel sheets 601. Since the spiral steel sheets 601 are made of steel, when the two sheets are compressed and produce circumferential tensile stress, the two sheets will squeeze and rub against each other. The spacer sleeve 7 is arranged to avoid metal friction fatigue between the two sheets, thereby improving the overall protection effect of the cable.

[0033] like Figure 4 As shown, in some embodiments, the inner and outer side walls of the spacer 7 are provided with a spiral groove 8, and the two spiral steel sheets 601 are respectively embedded in the two spiral grooves 8. The spiral grooves 8 can limit the spiral steel sheets 601, so that when the spiral steel sheets 601 are deformed to produce annular tensile stress, the spacer 7 will apply a counter-resistance force to the tensile stress of the spiral steel sheets 601, thereby further improving the compressive resistance effect.

[0034] like Figure 5 As shown, in some embodiments, a protective sleeve 9 is provided between the middle sleeve layer 4 and the pressure-resistant layer 6. Therefore, when the spiral steel sheet 601 is deformed and generates circumferential tensile stress, its side edge will come into frictional contact with the flexible ABS plastic sleeve 401, which may easily cause wear to the flexible ABS plastic sleeve 401. By providing the protective sleeve 9, the spiral steel sheet 601 located on the inner side is prevented from contacting with the flexible ABS plastic sleeve 401, so as to protect the flexible ABS plastic sleeve 401 and ensure the low temperature resistance of the cable.

[0035] like Figure 2As shown, in some embodiments, a tensile rod 10 is coaxially arranged in the inner sleeve 1, and a plurality of support plates 11 are arranged in an array on the outer surface of the tensile rod 10. The free ends of the plurality of support plates 11 are respectively overlapped with the inner wall of the inner sleeve 1, and a cavity is formed between two adjacent support plates 11. A plurality of wire bodies 2 are respectively located in the plurality of cavity. The tensile rod 10 and the support plates 11 can form a support frame to support the inner sleeve 1, thereby further improving the compressive performance of the cable.

[0036] like Figure 2 As shown, in some embodiments, the free end of the support plate 11 is provided with an arc-shaped stopper 12, and the arc-shaped stopper 12 is in contact with and overlaps the inner wall of the inner sleeve layer 1. By setting the arc-shaped stopper 12, the contact area between the support plate 11 and the inner sleeve layer 1 is increased, stress concentration is avoided, and thus practicality is improved.

[0037] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. Low temperature resistant cable, characterized in that: include: An inner jacket (1), wherein a plurality of wire bodies (2) are arranged in the inner jacket (1), wherein the wire bodies (2) comprise a wire core (201), an insulating layer (202) and a shielding layer (203) which are sequentially distributed from the inside to the outside, and a filling cavity is provided between the inner jacket (1) and the plurality of wire bodies (2), wherein the filling cavity is filled with asbestos (3); A middle jacket layer (4) is arranged on the outer surface of the inner jacket layer (1), wherein the middle jacket layer (4) comprises a flexible ABS plastic jacket (401), and a glass fiber mesh cloth (402) is arranged inside the flexible ABS plastic jacket (401); The outer jacket layer (5) is arranged on the middle jacket layer (4), and a pressure-resistant layer (6) is arranged between the outer jacket layer (5) and the middle jacket layer (4).

2. The low temperature resistant cable according to claim 1, characterized in that: The compression-resistant layer (6) comprises a spiral steel sheet (601), and the spiral steel sheet (601) is spirally wound on the middle jacket layer (4).

3. The low temperature resistant cable according to claim 2, characterized in that: The number of the spiral steel sheets (601) is two, and the two spiral steel sheets (601) are arranged inside and outside and have opposite spiral directions.

4. The low temperature resistant cable according to claim 3, characterized in that: A spacer (7) is provided between the two spiral steel sheets (601).

5. The low temperature resistant cable according to claim 4, characterized in that: The inner and outer side walls of the spacer (7) are both provided with spiral grooves (8), and two spiral steel sheets (601) are respectively embedded in the two spiral grooves (8).

6. The low temperature resistant cable according to claim 1, characterized in that: A protective sleeve (9) is provided between the middle sleeve layer (4) and the pressure-resistant layer (6).

7. The low temperature resistant cable according to claim 1, characterized in that: A tensile rod (10) is coaxially arranged inside the inner sleeve layer (1), and a plurality of support plates (11) are arranged in an array on the outer surface of the tensile rod (10). The free ends of the plurality of support plates (11) are respectively overlapped with the inner wall of the inner sleeve layer (1), and a cavity is formed between two adjacent support plates (11), and the plurality of wire bodies (2) are respectively located in the plurality of cavity.

8. The low temperature resistant cable according to claim 7, characterized in that: The free end of the support plate (11) is provided with an arc-shaped stopper (12), and the arc-shaped stopper (12) is in contact with and overlaps the inner wall of the inner sleeve layer (1).

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