Expansion type power cable

Abstract

The utility model discloses a capacity expansion type power cable which comprises an outer protective layer, a heat insulation layer, an armor layer, an inner protective layer, a water-blocking isolation layer and a cable core which are sequentially arranged from outside to inside, the cable core comprises a plurality of main conductor units, a plurality of auxiliary conductor units and a cross-shaped supporting frame, the main conductor units are divided into different spaces by the cross-shaped supporting frame, and the auxiliary conductor units are arranged in the cross-shaped supporting frame. The auxiliary conductor units are separated in different spaces by the cross-shaped support frame, and the main conductor units and the auxiliary conductor units are respectively contacted with the cross-shaped support frame. According to the utility model, the conductor is made of 99.9999% annealed oxygen-free flexible copper wires, the elongation can be controlled, the roundness and flexibility of the conductor are ensured, the cross-shaped support frame is made of flame-retardant polyethylene, the cross-shaped support frame is of a hollow structure, and the cross-shaped support frame is in contact with the four main conductor units and the four auxiliary conductor units, so that the service life of the cross-shaped support frame is prolonged. According to the design, heat generated by working of the four main conductor units and the four auxiliary conductor units can be taken away, and the situation that normal working of the four main conductor units and the four auxiliary conductor units is affected by too high temperature is avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of cables, and in particular relates to a capacity-expanding power cable. Background Art

[0002] With the progress of the times, electricity has become the most widely used energy source, and the application of power cables has become increasingly important in daily life. However, the flame retardant performance of existing power cables needs to be improved, and the current carrying capacity needs to be improved. Utility Model Content

[0003] In order to solve the technical problems existing in the prior art, the purpose of the utility model is to provide a capacity-expanding power cable.

[0004] In order to achieve the above purpose and the above technical effect, the technical solution adopted by the utility model is:

[0005] An expandable power cable comprises an outer sheath, a heat insulation layer, an armor layer, an inner sheath, a water-blocking isolation layer and a cable core which are sequentially arranged from outside to inside. The cable core comprises a plurality of main conductor units, a plurality of auxiliary conductor units and a cross support frame. The main conductor units are separated into different spaces by the cross support frame, and the auxiliary conductor units are separated into different spaces by the cross support frame. The main conductor units and the auxiliary conductor units are in contact with the cross support frame respectively.

[0006] Furthermore, there are four main conductor units, which are separated into four different spaces by a cross support frame. The main conductor unit includes a conductor I and an insulating layer I extruded outside the conductor I. The diameter of the conductor I is 15-17 mm, and the thickness of the insulating layer I is 0.5-2.4 mm.

[0007] Furthermore, there are four guiding body units, which are separated into four different spaces by a cross support frame. The guiding body unit includes a conductor II and an insulating layer II extruded outside the conductor II. The diameter of the conductor II is 5-7mm, and the thickness of the insulating layer II is 0.2-1.0mm.

[0008] Furthermore, each of the main conductor units is placed in the same space as one of the auxiliary conductor units and the two are not in contact with each other.

[0009] Furthermore, fillers are filled between the water-blocking isolation layer and the main conductor unit, the auxiliary conductor unit, and the cross support frame.

[0010] Furthermore, the thickness of the outer protective layer is 2.2-3.5 mm, and the outside of the outer protective layer is coated with an anti-termite layer with a thickness of 0.1-0.6 mm.

[0011] Furthermore, the thermal insulation layer comprises a mica tape and an alkali-free glass fiber tape sequentially arranged from the outside to the inside, and the thickness of the mica tape and the alkali-free glass fiber tape are 0.3-0.7 mm respectively.

[0012] Furthermore, the thickness of the inner protective layer is 1.5-2.2 mm.

[0013] Furthermore, the thickness of the water-blocking isolation layer is 1.2-1.6 mm.

[0014] Furthermore, the cross support frame is a hollow structure.

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

[0016] The utility model discloses an expansion type power cable. The conductor is made of 99.9999% annealed oxygen-free flexible copper wire, and the elongation can be controlled to ensure the roundness and softness of the conductor. The cross support frame is made of flame-retardant polyethylene. The cross support frame is a hollow structure and is in contact with four main conductor units and four auxiliary conductor units. This design can take away the heat generated by the four main conductor units and the four auxiliary conductor units, and avoid the influence of excessive temperature on the normal operation of the four main conductor units and the four auxiliary conductor units. At the same time, it is beneficial to improve the current carrying capacity, flame retardant performance and water blocking performance of the cable. The overall structure is simple, round and compact. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the utility model. DETAILED DESCRIPTION

[0018] The present invention is described in detail below so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.

[0019] A brief summary of one or more aspects is given below to provide a basic understanding of these aspects. This summary is not an exhaustive overview of all conceived aspects, and is neither intended to identify the key or critical elements of all aspects nor to define the scope of any or all aspects. Its only purpose is to give some concepts of one or more aspects in a simplified form as a prelude to a more detailed description that will be given later.

[0020] like Figure 1As shown, an expandable power cable comprises an outer sheath 1, a heat insulation layer 2, an armor layer 3, an inner sheath 4, a water-blocking isolation layer 5 and a cable core which are sequentially arranged from outside to inside, wherein the cable core comprises a plurality of main conductor units 6, a plurality of auxiliary conductor units 7, a cross support frame 8 and a filler 9, a plurality of main conductor units 6 are separated into different spaces by the cross support frame 8, a plurality of auxiliary conductor units 7 are separated into different spaces by the cross support frame 8, each main conductor unit 6 is placed in the same space with a auxiliary conductor unit 7 and the two are not in contact, the outer diameter of the main conductor unit 6 is larger than the outer diameter of the auxiliary conductor unit 7, the main conductor unit 6 and the auxiliary conductor unit 7 are respectively in contact with the cross support frame 8, and the water-blocking isolation layer 5 and the main conductor unit 6, the auxiliary conductor unit 7 and the cross support frame 8 are filled with fillers 9.

[0021] In some embodiments, the outer sheath 1 has a thickness of 2.2-3.5 mm and is made of low-smoke, halogen-free, flame-retardant polyolefin. The outer surface of the outer sheath 1 is coated with an anti-termite layer with a thickness of 0.1-0.6 mm.

[0022] In some embodiments, the thermal insulation layer 2 includes a mica tape and an alkali-free glass fiber tape sequentially arranged from the outside to the inside, and the thickness of the mica tape and the alkali-free glass fiber tape are 0.3-0.7 mm, respectively.

[0023] In some embodiments, the armor layer 3 is made of galvanized steel strip or stainless steel wire, and when the double-layer galvanized steel strip is used for gap wrapping, it is necessary to ensure that no leakage occurs.

[0024] In some embodiments, the inner protective layer 4 has a thickness of 1.5-2.2 mm and is made of low-smoke halogen-free flame-retardant polyolefin.

[0025] In some embodiments, the thickness of the water-blocking isolation layer 5 is 1.2-1.6 mm, and it is made of a semi-conductive water-blocking tape by overlapping wrapping, and the overlap rate of each layer is not less than 24%.

[0026] In some embodiments, the main conductor unit 6 includes a conductor I and an insulating layer I extruded on the outside of the conductor I. The conductor I is made of 99.9999% annealed oxygen-free flexible copper wire, which can control the elongation and ensure the roundness and softness of the conductor. The diameter of the conductor I is 15-17mm, and the insulating layer I is made of cross-linked polyethylene. The thickness of the insulating layer I is 0.5-2.4mm.

[0027] In some embodiments, the guiding body unit 7 includes a conductor II and an insulating layer II extruded outside the conductor II, the conductor II is made of 99.9999% annealed oxygen-free flexible copper wire, the diameter of the conductor II is 5-7mm, the insulating layer II is made of cross-linked polyethylene, and the thickness of the insulating layer II is 0.2-1.0mm.

[0028] In some embodiments, the cross support frame 8 is made of flame-retardant polyethylene. The cross support frame 8 is a hollow structure and is in contact with both the main conductor unit 6 and the auxiliary conductor unit 7. This design can take away the heat generated by the main conductor unit 6 and the auxiliary conductor unit 7, avoiding excessive temperature from affecting the normal operation of the main conductor unit 6 and the auxiliary conductor unit 7, while also playing a certain supporting role.

[0029] In some embodiments, the filler 9 is a non-hygroscopic polypropylene filling film.

[0030] Example 1

[0031] like Figure 1 As shown, an expandable power cable comprises an outer sheath 1, a heat insulation layer 2, an armor layer 3, an inner sheath 4, a water-blocking isolation layer 5 and a cable core which are sequentially arranged from the outside to the inside, wherein the cable core comprises four main conductor units 6, four auxiliary conductor units 7, a cross support frame 8 and a filler 9, the four main conductor units 6 and the four auxiliary conductor units 7 are respectively separated in four different spaces by the cross support frame 8, each main conductor unit 6 is placed in the same space with a auxiliary conductor unit 7 and the two do not contact each other, the outer diameter of the main conductor unit 6 is larger than the outer diameter of the auxiliary conductor unit 7, the main conductor unit 6 and the auxiliary conductor unit 7 are respectively in contact with the cross support frame 8, and the water-blocking isolation layer 5 and the main conductor unit 6, the auxiliary conductor unit 7 and the cross support frame 8 are filled with fillers 9.

[0032] The outer sheath 1 has a thickness of 3.0 mm and is made of low-smoke, halogen-free, flame-retardant polyolefin. The outer surface of the outer sheath 1 is coated with an anti-ant layer with a thickness of 0.3 mm.

[0033] The heat insulation layer 2 includes a mica tape and an alkali-free glass fiber tape which are sequentially arranged from the outside to the inside. The thickness of the mica tape and the alkali-free glass fiber tape are 0.3 mm respectively.

[0034] The armor layer 3 is made of galvanized steel strips. When the double-layer galvanized steel strips are used for gap wrapping, it is necessary to ensure that no leakage occurs.

[0035] The inner protective layer 4 has a thickness of 1.5 mm and is made of low-smoke halogen-free flame-retardant polyolefin.

[0036] The thickness of the water-blocking isolation layer 5 is 1.2 mm, and it is made of a semi-conductive water-blocking tape through overlapping wrapping, and the overlap rate of each wrapping layer is 26%.

[0037] The main conductor unit 6 includes a conductor I and an insulating layer I extruded on the outside of the conductor I. The conductor I is made of 99.9999% annealed oxygen-free flexible copper wire, which can control the elongation and ensure the roundness and softness of the conductor. The diameter of the conductor I is 15 mm, and the insulating layer I is made of cross-linked polyethylene. The thickness of the insulating layer I is 0.8 mm.

[0038] The guidance body unit 7 includes a conductor II and an insulating layer II extruded outside the conductor II. The conductor II is made of 99.9999% annealed oxygen-free flexible copper wire. The diameter of the conductor II is 5 mm. The insulating layer II is made of cross-linked polyethylene. The thickness of the insulating layer II is 0.2 mm.

[0039] The cross support frame 8 is made of flame-retardant polyethylene. The cross support frame 8 is a hollow structure and is in contact with the four main conductor units 6 and the four auxiliary conductor units 7. This design can take away the heat generated by the four main conductor units 6 and the four auxiliary conductor units 7, avoiding excessive temperature from affecting the normal operation of the four main conductor units 6 and the four auxiliary conductor units 7, and also plays a certain supporting role.

[0040] The filler 9 is a non-hygroscopic polypropylene filling film.

[0041] Parts or structures not specifically described in the present invention may adopt existing technologies or existing products and will not be described in detail here.

[0042] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. An expanded power cable, characterized in that: The cable core comprises an outer protective layer, a heat insulating layer, an armor layer, an inner protective layer, a water-blocking isolation layer and a cable core which are sequentially arranged from the outside to the inside. The cable core comprises a plurality of main conductor units, a plurality of auxiliary conductor units and a cross support frame. The main conductor units are separated into different spaces by the cross support frame, and the auxiliary conductor units are separated into different spaces by the cross support frame. The main conductor units and the auxiliary conductor units are in contact with the cross support frame respectively.

2. The capacity-expanding power cable according to claim 1, characterized in that: There are four main conductor units, which are separated into four different spaces by a cross support frame. The main conductor unit includes a conductor I and an insulating layer I extruded outside the conductor I. The diameter of the conductor I is 15-17mm, and the thickness of the insulating layer I is 0.5-2.4mm.

3. The capacity-expanding power cable according to claim 1, characterized in that: There are four guiding body units, which are separated into four different spaces by a cross support frame. The guiding body unit includes a conductor II and an insulating layer II extruded outside the conductor II. The diameter of the conductor II is 5-7mm, and the thickness of the insulating layer II is 0.2-1.0mm.

4. The capacity-expanding power cable according to claim 1, characterized in that: Each of the main conductor units is placed in the same space with one auxiliary conductor unit and there is no contact between the two.

5. The capacity-expanding power cable according to claim 1, characterized in that: Fillers are filled between the water-blocking isolation layer and the main conductor unit, the auxiliary conductor unit and the cross support frame.

6. The capacity-expanding power cable according to claim 1, characterized in that: The thickness of the outer protective layer is 2.2-3.5 mm, and the outer portion of the outer protective layer is coated with an anti-ant layer with a thickness of 0.1-0.6 mm.

7. The capacity-expanding power cable according to claim 1, characterized in that: The heat insulation layer comprises a mica tape and an alkali-free glass fiber tape which are sequentially arranged from the outside to the inside, and the thickness of the mica tape and the alkali-free glass fiber tape are 0.3-0.7 mm respectively.

8. The capacity-expanding power cable according to claim 1, characterized in that: The thickness of the inner protective layer is 1.5-2.2 mm.

9. The capacity-expanding power cable according to claim 1, characterized in that: The thickness of the water-blocking isolation layer is 1.2-1.6 mm.

10. The capacity-expanding power cable according to claim 1, characterized in that: The cross support frame is a hollow structure.

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