CN210692178U

CN210692178U - Hollow sheath cable

Info

Publication number: CN210692178U
Application number: CN201921654993.9U
Authority: CN
Inventors: 屈魁琳; 蔡建荣; 周瑞; 郭壮; 高朋飞; 张照阳
Original assignee: Jiangsu Zhongli Group Co Ltd
Current assignee: Jiangsu Zhongli Group Co Ltd
Priority date: 2019-09-30
Filing date: 2019-09-30
Publication date: 2020-06-05
Anticipated expiration: 2029-09-30

Abstract

The utility model discloses a cavity sheath cable, which comprises a conductor, the conductor is stranded by the copper wire and forms, insulating layer and backbone have been extruded outward to the conductor, the cross-section of backbone is trapezoidal, the backbone is located the insulating layer surface, the backbone has 4, is the cross and distributes, the insulating layer has extruded the restrictive coating outward, the restrictive coating is extruded on the backbone, makes vacuole formation between restrictive coating and the insulating layer, it has gas or liquid to lead to in the cavity, the utility model has the advantages of through leading-in gas or liquid cooling in the cavity between insulating layer and the restrictive coating, along with the circulation flow of gas or liquid, cool down the conductor, under the same conductor cross-section, effectively improve the current-carrying capacity of cable.

Description

Hollow sheath cable

Technical Field

The utility model relates to a cable, concretely relates to cavity sheath cable belongs to the cable manufacturing field.

Background

In the use of the cable, the conductor can be caused to generate heat seriously along with the increase of the current passing through the conductor, the cable is adversely affected, and great potential safety hazards exist. In order to solve the problem, the current technology mainly increases the allowable current-carrying capacity of a wire core by increasing the sectional area (square number) of a conductor, and the scheme increases the laying difficulty and the laying space of the cable and also increases the cost. Under the condition that the section area of the wire core is fixed, how to ensure that the temperature of the conductor is not too high while the current-carrying capacity of the conductor is increased becomes a problem to be solved urgently.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a cavity sheath cable, this cable can cool down the conductor, under the same conductor cross-section, effectively improves the current-carrying capacity of cable.

In order to achieve the technical purpose, the technical scheme of the utility model is that: the utility model provides a cavity sheath cable, includes the conductor, insulating layer and backbone have been extruded outward to the conductor, the backbone is rectangular shape, the backbone is located the insulating layer surface, the insulating layer has been extruded outward, the restrictive coating is extruded on the backbone, makes to form the cavity between restrictive coating and the insulating layer, it has gas or liquid to lead to in the cavity.

Preferably, the cross section of the spine is trapezoidal.

Preferably, the number of the spines is 4, and the spines are distributed in a cross shape.

Preferably, the conductor is formed by twisting copper wire bundles.

Compared with the prior art, the utility model has the advantages of through leading-in gas or liquid cooling in the cavity between insulating layer and the restrictive coating, along with the circulation flow of gas or liquid, cool down the conductor, under the same conductor cross-section, effectively improve the current-carrying capacity of cable.

Drawings

Fig. 1 is a cross-sectional view of the present invention.

Fig. 2 is a schematic front view of a first set of extrusion die set.

Fig. 3 is a left side view schematic diagram of a die sleeve of the first set of extrusion die.

Fig. 4 is a schematic front view of a first set of extrusion die cores.

Fig. 5 is a left side view schematic diagram of a first set of extrusion die cores.

FIG. 6 is a front view of a second set of extrusion die set.

FIG. 7 is a left side view of the second set of extrusion die set.

FIG. 8 is a schematic diagram of a core of a second set of extrusion dies in a front view.

FIG. 9 is a left side view of the second set of extrusion die cores.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

As shown in figure 1, the hollow sheath cable comprises a conductor 1, wherein the conductor 1 is formed by twisting copper wire bundles, an insulating layer 2 and a spine 4 are extruded outside the conductor 1, and the insulating layer 2 and the spine 4 are integrally formed. The cross-section of backbone 4 is trapezoidal, backbone 4 is located insulating layer 2 surfaces, backbone 4 has 4, is the cross and distributes, insulating layer 2 extrudes outward has restrictive coating 3, restrictive coating 3 extrudes on backbone 4, makes to form cavity 5 between restrictive coating 3 and the insulating layer 2, cavity 5 intussuseption has gas or liquid, through leading-in gas or liquid in the cavity 5 to between insulating layer 2 and the restrictive coating 3, can realize gas or liquid to the cooling and heat dissipation effect of cable conductor 1.

The hollow sheath cable is prepared by the following steps: (1) placing two sets of extruders in front and back, placing auxiliary equipment such as a cooling water tank, a spark machine and the like between the two sets of extruders, and enabling the rest devices to be consistent with a production line of a common extruder and comprise a pay-off rack, a take-up rack and the like; (2) twisting the conductor copper wire bundle into a required sectional area; (3) selecting an extrusion die for manufacturing the trapezoidal spine according to the size of the product, and installing the extrusion die on a first set of extruders as shown in figures 2-5; (4) after the conductor passes through the first set of extruder, the wire core is placed in a water tank for cooling and forming (forming the insulating layer 2 and the spine 4), the wire core is dried by a drying device, and the wire core is sent into the second set of extruder; (5) selecting and manufacturing a pipe extruding die according to the size of the core wire after the inner layer is extruded and the product requirement, and installing the pipe extruding die on a second set of extruder as shown in figures 6-9; (6) after the wire core passes through the second set of extruder, the sheath layer 3 is formed, and finally the hollow sheath cable is formed.

The utility model relates to a liquid cooling cable, liquid cooling cable cavity leads to water for heavy current heating equipment's special type cable. The liquid cooling cable is connected with the water pump through the metal pipe, and the heat is taken away by utilizing the circulating flow of the cooling liquid in the metal pipe, so that the insulation wire core can be continuously protected, and the insulation wire core can safely operate at high temperature. Such as the cable assembly disclosed in application publication No. CN107545953A, which includes a three-core medium voltage fire resistant cable and a smart water pump. The three-wire core medium-voltage fire-resistant cable is provided with three insulating wire cores, a protective layer and a plurality of metal pipes, wherein the protective layer is covered outside the three insulating wire cores, a first gap is formed between the three insulating wire cores and the protective layer, the plurality of metal pipes are positioned in the first gap, the metal pipes are abutted against the protective layer and at least one insulating wire core, and cooling liquid is filled in the metal pipes; the intelligent water pump has temperature sensor, and many tubular metal resonator connect in the intelligent water pump, and when temperature sensor detected the temperature of coolant liquid and reached the trigger temperature of intelligent water pump, the intelligent water pump was opened. The three-core medium-voltage fire-resistant cable in the cable assembly is connected with the intelligent water pump through the metal pipe, and heat is taken away by utilizing the circulating flow of the cooling liquid in the metal pipe. The utility model discloses the cable also carries out the circulation of cooling water through above-mentioned similar principle, passes through tubular metal resonator and water pump cyclic connection at the cable both ends, and cable (cavity 5), tubular metal resonator, water pump form circulation pipeline promptly, utilize the circulation flow of coolant liquid in tubular metal resonator, cavity 5 to take away the cable heat.

The above-mentioned embodiment does not limit the utility model in any way, and all the technical solutions that adopt the mode of equivalent replacement or equivalent transform to obtain all fall within the protection scope of the utility model.

Claims

1. A hollow jacketed cable comprising a conductor (1), characterized in that: conductor (1) is extruded outward and is had insulating layer (2) and backbone (4), backbone (4) are rectangular shape, backbone (4) are located insulating layer (2) surface, insulating layer (2) have been extruded outward restrictive coating (3), restrictive coating (3) are extruded on backbone (4), make between restrictive coating (3) and insulating layer (2) formation cavity (5), cavity (5) expert has gas or liquid.

2. A hollow jacketed cable according to claim 1, characterized in that: the section of the spine (4) is trapezoidal.

3. A hollow jacketed cable according to claim 1, characterized in that: the number of the spines (4) is 4, and the spines are distributed in a cross shape.

4. A hollow jacketed cable according to claim 1, characterized in that: the conductor (1) is formed by twisting copper wire bundles.