JPH0682723U - Water cooling cable - Google Patents

Abstract

(57) [Summary] [Purpose] Peeling between layers and abrasion of the outer peripheral surface are unlikely to occur,
Provided is a water-cooled cable having a rubber hose which is excellent in flexibility and excellent in absorption and relaxation of twist. [Structure] A rubber hose 8 having the structure described below is coated on the outside of the stranded wire conductor 7, and a water passage 9 is formed between the inner circumference of the rubber hose 8 and the outer circumference of the stranded wire conductor 7. In the rubber hose 8, a wound body 11 formed by winding a thin wire 10 made of a non-magnetic metal or the like into a coil, and a composite rubber wire 13 concentrically and completely embedded are provided on the reinforcing cloth layer 14. It is wound in a spiral shape, and the outer rubber layer 15 is embedded between the windings of these wires without a gap. Then, the outer rubber layer 16 is provided on the smooth intermediate reinforcing layer having no unevenness on the surface, and the heat resistant coating layer 17 is further provided thereon.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a water cooling cable for an electric furnace or the like.

[0002]

[Prior art]

 As shown in Fig. 4, a water-cooled cable conventionally used as a power supply line for an electric furnace such as an arc furnace for steelmaking has a layer of reinforcing cloth or the like on the outside of the conductor 1 made of annealed copper wire. It has a structure in which the rubber hose 2 laminated via the rubber hose 2 is covered, and a water passage (cooling water passage) 3 is formed between the inner circumference of the rubber hose 2 and the outer circumference of the stranded conductor 1. In addition, at the ends, copper terminals 4 are soldered to both ends of the stranded conductor 1, and the ends of the rubber hose 2 are fixed on the copper terminals 4 by tightening a ring-shaped band 5 such as a stainless band. Has been done.

In the water-cooled cable having such a structure, the copper terminal 4 on one side is connected to the electric furnace and the copper terminal 4 on the other side is connected and fixed to the transformer. Therefore, the cable itself moves in accordance with the movement of the furnace body, such as the furnace lid swiveling, the furnace body tilting, and the electrode vertical movement, so that it is required to have great flexibility. Conventionally, in order to improve the flexibility of the water-cooled cable in response to such requirements, the inner and outer layers of the rubber hose 2 may be thinned, or as shown in FIG. A reinforcing wire 6 made of FRP (fiber reinforced plastic) or the like is spirally wound (for example, between the reinforcing layer and the rubber outer layer) and concentrically inserted.

[0004]

[Problems to be solved by the device]

 However, in the water-cooled cable using the thin rubber hose 2, the strength of the rubber hose 2 is not sufficient, and water leakage may occur at an early stage.

In the latter case of the water-cooled cable using the reinforced rubber hose 2, the hose rubber layer and the reinforcing wire 6 are not sufficiently adhered to each other, causing peeling or the embedded reinforcing wire. 6 caused a protrusion on the outer peripheral surface of the rubber hose 2, which resulted in early wear.

The present invention has been made in order to solve these problems, and is a water-cooled cable that is less likely to be peeled off between layers of the rubber hose or worn on the outer peripheral surface, has good flexibility, and is excellent in absorption and relaxation of twists. The purpose is to provide.

[0007]

[Means for Solving the Problems]

 The water-cooled cable of the present invention includes a stranded conductor and a hose that is formed by stacking a plurality of layers and that surrounds the conductor and forms a water passage between the inner periphery of the conductor and the outer periphery of the conductor. In a water-cooled cable, a non-magnetic high tensile strength thin wire is wound into a coil, and a cylindrical rubber-like elastic wire embedded concentrically is wound spirally between the layers of the hose. It is characterized by

[0008]

[Action]

 In the water-cooled cable of the present invention, a coil-shaped wound body made of non-magnetic and high tensile strength thin wire is concentrically embedded in a cylindrical rubber-like elastic wire, and a composite wire is placed between layers of the hose. Since the coil-shaped wound body is intercalated and expands sufficiently in accordance with the expansion of the rubber-like elastic body layer enclosing it, the coil-shaped wound body is attached to the interface between the wound body and the rubber-like elastic body layer. No peeling occurs and water leakage is prevented. In addition, since the composite wire in which such a coil-shaped wound body is embedded is further spirally wound and interposed, the flexibility of the hose and the absorption and relaxation of the twist are improved. . Furthermore, since the outer peripheral surface of the hose is made smooth without protrusions, premature wear does not occur.

[0009]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a longitudinal sectional view showing an embodiment of the water-cooled cable of the present invention, and FIGS. 2 and 3 are enlarged longitudinal sectional views and transverse sectional views of a composite rubber wire used in the embodiment, respectively. is there.

In the figure, reference numeral 7 indicates a stranded wire conductor formed by twisting a plurality of annealed copper wires, and a hose 8 having the following structure is covered on the outer side of the stranded wire conductor. A water passage 9 is formed between the water and the outer circumference.

That is, in this hose 8, as shown in FIGS. 2 and 3 in an enlarged manner, a thin wire 10 made of a non-magnetic metal such as aluminum or a high tensile strength plastic material such as FRP is used. A wound body 11 formed by winding a coil of 2 to 3 mm is concentrically and completely embedded inside a cylindrical rubber wire 12 having an outer diameter of about 6 mm. It is spirally wound on the reinforcing cloth layer 14. Further, the outer layer rubber 15 is embedded without a gap between the windings of such a composite rubber wire 13, and a smooth intermediate reinforcing layer having no irregularities on the surface is formed. Furthermore, a rubber outer layer 16 is provided on the intermediate reinforcing layer, and a heat resistant coating layer 17 is further provided thereon. In the figure, reference numeral 18 indicates a rubber inner layer.

Here, the rubber hose having such a structure is manufactured, for example, by the following method. That is, first, the inner rubber layer 18 and the reinforcing cloth layer 14 are sequentially laminated on the core metal having a predetermined outer diameter by a conventional method. Then, on the reinforcing cloth layer 14, the above-mentioned composite rubber wire 13 and a full-type string-like wire made of the same unvulcanized rubber as the rubber (outer layer rubber) forming the outer layer 16 are combined. And the cord-shaped wire are wound in a spiral so that they are alternately arranged with no gap. Next, a sheet-shaped outer layer rubber is coated thereon, and a heat-resistant coating 17 is further provided thereon, and then heated to integrally vulcanize the cord-shaped wire and the outer layer rubber.

In the water-cooled cable of the embodiment configured as described above, the coil-shaped winding body 11 made of a material such as aluminum or FRP having a nonmagnetic and high tensile strength is concentrically embedded in a cylindrical shape. The composite rubber wire 13 is wound around the reinforcing cloth layer 14 in a spiral shape, and the coiled winding body 11 expands sufficiently following the expansion of the rubber layer constituting the composite rubber wire 13. Therefore, peeling of the adhesive does not occur at the interface between the wound body 11 and the rubber layer, and troubles such as water leakage can be prevented at an early stage. Further, since such a composite rubber wire 13 is further spirally wound and is interposed between the layers of the rubber hose, the flexibility and the absorbability of twisting are high. Further, since the outer layer rubber 15 is embedded in a spiral shape between the windings of the composite rubber wire 13 to form an intermediate reinforcing layer having a smooth surface, and the rubber outer layer 16 and the like are further provided thereon, The outer surface of the rubber hose is flat with no protrusions. Therefore, the occurrence of premature wear due to the protrusions on the surface is prevented, and good watertightness is maintained for a long period of time.

The water-cooled cable of the present invention is not limited to the above embodiment. For example, the material forming the outer layer of the hose is not limited to the rubber material as long as it has sufficient elasticity, and may be a plastic material.

[0015]

[Effect of device]

 As described above, in the water-cooled cable of the present invention, the cylindrical rubber-like elastic wire in which the coil-like wound body made of the non-magnetic high tensile strength wire is embedded is further wound in a spiral shape to form the interlayer of the hose. Since it is interposed between the reinforcing wire and the rubber-like elastic layer, peeling of the adhesive is unlikely to occur, the flexibility of the hose is good, and the absorption and relaxation of twists is excellent. Moreover, since the outer peripheral surface of the hose is smooth without any protrusions, early wear due to the protrusions is unlikely to occur, and good watertightness is maintained for a long period of time.

[Brief description of drawings]

FIG. 1 is a longitudinal sectional view showing an embodiment of a water cooling cable of the present invention.

FIG. 2 is an enlarged vertical cross-sectional view showing a cylindrical composite rubber wire used in Examples.

FIG. 3 is a lateral cross-sectional view showing an enlarged composite rubber wire used in the same example.

FIG. 4 is a partial vertical cross-sectional view of a conventional water cooling cable.

FIG. 5 is a view showing an example of a hose used for improving flexibility in a conventional water-cooled cable.

[Explanation of symbols]

 1, 7 ... Stranded conductor 2 ... Rubber hose 3, 9 ... Water channel 4 ... Copper terminal 5 ... Band 6 ... Reinforcing wire 8 ... Hose 10 ... Non-magnetic high tensile strength material Thin wire 11 consisting of ... Coil-shaped wound body 12 ... Cylindrical rubber wire 13 ... Composite rubber wire 14 ... Reinforcing cloth layer 15 ... Outer rubber 16 ... Rubber outer layer 17 ……… Heat-resistant coating layer 18 ………… Rubber inner layer

Claims (1)

[Scope of utility model registration request] 1. A water-cooled cable comprising a stranded conductor and a hose which is formed by laminating a plurality of layers and which surrounds the conductor and forms a water passage between an inner periphery of the conductor and an outer periphery of the conductor. In (1), a winding body formed by winding a non-magnetic high tensile strength thin wire in a coil shape is formed by spirally winding a concentrically embedded cylindrical rubber-like elastic wire rod between layers of the hose. Characterize.