Polyethylene insulated cable

Abstract

The utility model discloses a polyethylene insulated cable, which relates to the technical field of cables, and comprises a cable body, the surface of the cable body is provided with a plurality of annular grooves at intervals, the annular grooves are symmetrically provided with a plurality of reinforcing raised lines, the reinforcing raised lines are respectively arranged on the annular grooves in an annular array, and the reinforcing raised lines are arranged in the annular grooves. The two symmetrical reinforcing protruding strips are arranged in a staggered mode, receding gaps are formed between the opposite ends of the reinforcing protruding strips and the roots of the annular grooves respectively, and a plurality of reinforcing ribs are arranged between every two adjacent annular grooves. According to the utility model, under the action of the annular groove, the stress concentration of the cable during bending is reduced, the cable material is allowed to be more freely deformed during bending, the risks of material damage and performance reduction caused by the stress concentration are reduced, in addition, the reinforcing raised lines improve the compression resistance and the compression resistance capability of the annular groove during deformation, and the service life of the cable is prolonged. The service life is further prolonged; the mechanical property of the surface is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of cables, in particular to a polyethylene insulated cable. Background Art

[0002] Polyethylene insulated cable is a cable that uses polyethylene (PE) as the insulating material. Polyethylene material has excellent electrical properties at room temperature, and can be cross-linked by irradiation or chemical methods to change its molecular structure from a linear to a three-dimensional network structure, thereby improving its electrical and mechanical properties at high temperatures.

[0003] During the installation of cables, due to limited installation space or when connecting to junction boxes, distribution boxes or other switchgear, cables may need to be bent and connected in some cases to adapt to the specific installation environment.

[0004] The existing technology has the following problems: the cable will be over-stretched or compressed during the bending process. If the outer insulation layer of the polyethylene insulated cable is subjected to excessive tension or pressure for a long time, the outer insulation layer may easily crack or the conductor may break. In addition, during long-term use, the cable surface may age faster due to the influence of external ambient temperature, humidity, ultraviolet rays, oxygen and chemicals, thereby reducing the mechanical and electrical properties of the cable's external insulation material and affecting the safety of the cable. Utility Model Content

[0005] The utility model provides a polyethylene insulated cable, which is convenient for reducing excessive tension or pressure generated by the polyethylene insulated cable when it is bent and used, and reduces the aging phenomenon of the cable surface, thereby improving the safety of the cable and the mechanical and electrical properties of its surface insulation material.

[0006] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0007] A polyethylene insulated cable comprises a cable body, a plurality of annular grooves are arranged at intervals on the surface of the cable body, a plurality of reinforcing convex strips are symmetrically installed on the annular grooves, the reinforcing convex strips are respectively arranged in annular arrays on the annular grooves, two symmetrical reinforcing convex strips are respectively arranged in an interlaced manner, and the ends of the reinforcing convex strips facing each other form a clearance gap with the root of the annular groove;

[0008] A plurality of reinforcing ribs are arranged between two adjacent annular grooves. The reinforcing ribs are arranged in an annular array on the surface of the cable body, and the reinforcing ribs are arranged in an interlaced manner.

[0009] A further improvement of the technical solution of the utility model is that two ends of the reinforcing rib on one side away from the cable body are chamfered or rounded.

[0010] A further improvement of the technical solution of the utility model is that the cable body includes a filling body and an inner lining protective sleeve connected to the outside thereof, the filling body is provided with at least one conductor mechanism, the outer side of the inner lining protective sleeve is connected to a steel wire armor, and the outer side of the steel wire armor is connected to an outer sheath.

[0011] A further improvement of the technical solution of the utility model is that the conductor structure includes a water-blocking copper conductor and an inner semi-conductive shielding layer connected to the outside thereof, the outer side of the inner semi-conductive shielding layer is connected to a cross-linked polyethylene insulating protective sleeve, and the outer side of the cross-linked polyethylene insulating protective sleeve is connected to an alloy protective sleeve.

[0012] Due to the adoption of the above technical solution, the utility model has achieved the following technical progress compared with the prior art:

[0013] 1. The utility model provides a polyethylene insulated cable. When the cable body is bent for use, the cable body is deformed in the axial direction as a whole, and the stress concentration on the cable when bent is reduced under the action of the annular groove, and the cable material is allowed to deform more freely when bent, thereby reducing the risk of material damage and performance degradation caused by stress concentration, and improving the safety of the cable. In addition, the reinforced convex strip improves the compression resistance and compression resistance of the annular groove part when it is deformed, further improving its service life and the mechanical properties of its surface.

[0014] 2. The utility model provides a polyethylene insulated cable, wherein the steel wire armor in the conductor structure improves the bending performance of the cable body and, under the action of the cross-linked polyethylene insulating protective sheath, improves the performance of the cable body from cracking due to environmental stress. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the utility model;

[0016] Figure 2 for Figure 1 A in the enlarged view;

[0017] Figure 3 It is a cross-sectional view of the utility model.

[0018] In the figure: 10, cable body; 2, annular groove; 3, reinforcement convex strip; 4, reinforcement rib;

[0019] 11. Filling body; 12. Lining protective sleeve; 13. Conductor structure; 14. Steel wire armor; 15. Outer sheath;

[0020] 131. Water-blocking copper conductor; 132. Inner semi-conductive shielding layer; 133. Cross-linked polyethylene insulating protective sheath; 134. Alloy protective sheath. DETAILED DESCRIPTION

[0021] The present invention is further described in detail below in conjunction with the embodiments:

[0022] Example 1

[0023] like Figure 1-3 As shown, the utility model provides a polyethylene insulated cable, including a cable body 10, a plurality of annular grooves 2 are arranged on the surface of the cable body 10 at intervals, a plurality of reinforcing convex strips 3 are symmetrically installed on the annular grooves 2, the reinforcing convex strips 3 are respectively arranged in annular arrays on the annular grooves 2, two symmetrical reinforcing convex strips 3 are respectively arranged in an interlaced manner, and the ends of the reinforcing convex strips 3 facing each other form a clearance gap with the root of the annular grooves 2, a plurality of reinforcing ribs 4 are arranged between two adjacent annular grooves 2, the reinforcing ribs 4 are arranged in annular arrays on the surface of the cable body 10, the reinforcing ribs 4 are respectively arranged in an interlaced manner, and the two ends of the reinforcing ribs 4 on the side away from the cable body 10 are respectively chamfered or rounded.

[0024] Furthermore, the cross-sectional port of the annular groove 2 is preferably V-shaped, and the distance between two adjacent annular grooves 2 is preferably between 5mm-25mm. There are no less than 6 annular arrays of reinforcing ribs 4 on the surface of the cable body 10. When the cable body 10 is bent for use, its corresponding parts are deformed. At this time, the annular groove 2 increases the flexibility of the cable body 10 and reduces the stress on the cable body 10 when bending. In addition, the annular groove 2 can also be used as a positioning point or mark during cable manufacturing or use, which helps to improve production efficiency and installation convenience. At the same time, when the cable body 10 is bent for use, the reinforcing convex strips 3 improve the structural strength of the annular groove 2, and due to its staggered arrangement, it can also provide a certain amount of clearance space during its deformation process, and under the action of the reinforcing ribs 4 to reinforce the mechanical strength, the safety of the cable and the mechanical properties of its surface insulation material are further improved.

[0025] Example 2

[0026] like Figure 1-3 As shown, on the basis of Example 1, the utility model provides a technical solution: preferably, the cable body 10 includes a filling body 11 and an inner lining protective sleeve 12 connected to the outside thereof, at least one conductor mechanism 13 is arranged in the filling body 11, the outer side of the inner lining protective sleeve 12 is connected to a steel wire armor 14, the outer side of the steel wire armor 14 is connected to an outer sheath 15, the outer sheath 15 contains a light stabilizer, an ultraviolet absorber and an antioxidant, the conductor mechanism 13 includes a water-blocking copper conductor 131 and an inner semi-conductive shielding layer 132 connected to the outside thereof, the outer side of the inner semi-conductive shielding layer 132 is connected to a cross-linked polyethylene insulating protective sleeve 133, and the outer side of the cross-linked polyethylene insulating protective sleeve 133 is connected to an alloy protective sleeve 134.

[0027] Furthermore, the conductor structure 13 is preferably three. When the metal burrs on the surface of the water-blocking copper conductor 131 directly penetrate the insulating layer, the field emission of the high field strength of the spikes will induce electrical dendrites, and the inner semi-conductive shielding layer 132 can effectively weaken the electric field strength near the burrs, reduce field emission, and eliminate the air gap on the surface of the water-blocking copper conductor 131, avoiding local discharge caused by the rough surface of the conductor structure and the air gap caused by the twisting of the core. In addition, the cross-linked polyethylene insulating protective sheath 133 improves the tensile strength, impact resistance, insulation resistance, dielectric loss and other properties of the cable body 10, and cooperates with the light stabilizer, ultraviolet absorber and antioxidant in the outer sheath 15 to reduce the aging phenomenon of the cable body 10 during use and increase its service life.

[0028] The above generally describes the present invention in detail, but it is obvious to a person skilled in the art that some modifications or improvements can be made to the present invention. Therefore, modifications or improvements that do not deviate from the spirit of the present invention are within the scope of protection of the present invention.

Claims

1. A polyethylene insulated cable, characterized in that: The cable body (10) comprises a plurality of annular grooves (2) spaced apart on the surface of the cable body (10), a plurality of reinforcing convex strips (3) being symmetrically mounted on the annular grooves (2), the reinforcing convex strips (3) being arranged in an annular array on the annular grooves (2), two symmetrical reinforcing convex strips (3) being arranged alternately, and the ends of the reinforcing convex strips (3) facing each other forming a clearance gap with the root of the annular grooves (2); A plurality of reinforcing ribs (4) are arranged between two adjacent annular grooves (2); the reinforcing ribs (4) are arranged in an annular array on the surface of the cable body (10); and the reinforcing ribs (4) are arranged in a staggered manner.

2. A polyethylene insulated cable according to claim 1, characterized in that: The two ends of the reinforcing rib (4) on the side away from the cable body (10) are respectively chamfered or rounded.

3. A polyethylene insulated cable according to claim 1, characterized in that: The cable body (10) comprises a filling body (11) and an inner lining protective sleeve (12) connected to the outside thereof, wherein at least one conductor mechanism (13) is arranged in the filling body (11), the outer side of the inner lining protective sleeve (12) is connected to a steel wire armor (14), and the outer side of the steel wire armor (14) is connected to an outer sheath (15).

4. A polyethylene insulated cable according to claim 3, characterized in that: The conductor structure (13) comprises a water-blocking copper conductor (131) and an inner semi-conductive shielding layer (132) connected to the outside thereof, the outer side of the inner semi-conductive shielding layer (132) is connected to a cross-linked polyethylene insulating protective sleeve (133), and the outer side of the cross-linked polyethylene insulating protective sleeve (133) is connected to an alloy protective sleeve (134).

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