JPH08329752A - Cross-linking residue separating device - Google Patents

Abstract

PURPOSE: To reliably remove a cross-linking residue from condensed water with extremely simple constitution without enlarging a device. CONSTITUTION: A cross-linking residue separating device contains a filter member 28 to filtrate condensed water of steam containing a cross-linking residue, a holding member 27 to hold a filtering surface of the filtrate member 28 and a filter supply drum 29 round which the filter member 28 is wound so that a new filtering surface can be delivered in order on the holding member 27. Therefore, the cross-linking residue mixed in the condensed water is separated by a filtering action of the filter member 28 delivered on the holding member 27 from the filter supply drum 29.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a crosslinked residue separating apparatus suitable for use in a manufacturing process of electric wires such as CV cables whose insulating coating material is crosslinked polyethylene.

[0002]

2. Description of the Related Art In CV cables, crosslinked polyethylene (XLPE) is used as an insulating material for cable conductors. In the manufacturing process of this CV cable, polyethylene is subjected to a crosslinking treatment after coating the cable conductor with uncrosslinked polyethylene. A continuous vulcanizer using high-pressure steam is used for the cross-linking treatment of this polyethylene, and the uncross-linked polyethylene is subjected to the cross-linking treatment by passing through a vulcanization tube filled with high-pressure steam.

[0003]

By the way, in the high-pressure steam of the vulcanizing tube, a water-insoluble residue produced during the cross-linking treatment of polyethylene is produced. Since a large amount of the residue accumulated in the high-pressure steam has a bad influence on the product, it is necessary to successively remove the residue generated by the crosslinking treatment from the high-pressure steam.

Therefore, conventionally, the high-pressure steam partially derived from the vulcanization pipe is condensed, and the condensed water is conveyed to a large-scale treatment facility such as a water tank facility, where the residue is separated from the condensed water. Although it was treated, a cross-linking residue separation device that can be easily used without requiring such a large-scale treatment facility has been desired. Therefore, it is an object of the present invention to provide a relatively simple crosslinking residue separation device.

[0005]

In order to solve the above-mentioned problems, the present invention provides a belt-shaped filter member for filtering condensed water of steam containing a cross-linking residue, and a water-permeable material for holding a filtering surface of the filter member. And a filter supply drum around which the filter member is wound so that a new surface of the filter member can be sequentially drawn out on the holding member.

[0006]

In the crosslinking residue separating apparatus according to the present invention, the filter member is fed from the filter supply drum onto the holding member, the condensed water is supplied onto the filter member held by the holding member, and the filtering action of the filter member is performed. The cross-linking residue that mixes with the condensed water is separated.

[0007]

The present invention will be described in detail below with reference to the illustrated embodiments. FIG. 1 is a cross-linking residue separating apparatus 10 according to the present invention.
2 is a vertical cross-sectional view schematically showing the above, but prior to the description of the crosslinking residue separating apparatus 10, an outline of an electric wire production line to which the crosslinking residue separating apparatus 10 is applied will be described.

FIG. 2 is an explanatory view schematically showing a part of the CV cable manufacturing line. The conductor 11 for the CV cable is wound and held on the conductor feeder 12. The conductor 11 fed from the conductor feeder 12 is
By passing through an extruder 13 that extrudes a polyethylene material which is an uncrosslinked insulating material, it is continuously covered with uncrosslinked polyethylene. As the extruder 13, a common head system for simultaneously extruding a semiconductive layer together with an insulating layer or a tandem system in which a plurality of extrusion heads for individually extruding these materials are arranged in series can be used.

The uncrosslinked polyethylene coating the conductor 11 is guided to a vulcanizing pipe 14 having one end connected to an extruder 13. A cooling pipe 16 is connected to the other end of the vulcanization pipe 14 via a liquid level control device 15. A cross-linking zone is formed in the vulcanization pipe 14 by supplying high-pressure steam between the extruder 13 and the liquid level control device 15. The uncrosslinked coated polyethylene guided to the vulcanization pipe 14 undergoes a crosslinking treatment by passing through this crosslinking zone.

The coated polyethylene which has been subjected to the cross-linking treatment is guided to a cooling pipe 16 which has one end extending from the liquid level control device 15. A seal mechanism 17 is provided at the other end of the cooling pipe 16,
The cooling water between the liquid level control device 15 and the seal mechanism 17 of the cooling pipe 16 is filled with cooling water that forms a cooling zone. Therefore, the coated polyethylene guided to the cooling pipe 16 is cooled by passing through this cooling zone. Subsequently, the polyethylene covering the conductor 11 is sent to the winder 19 by the capstan 18 and wound as a CV cable on the winder 19.

In the illustrated example, the vulcanizing pipe 14 and the cooling pipe 16 are provided.
Shows a catenary type vulcanizer arranged along the catenary curve, but a horizontal or vertical type vulcanizer in which both pipes 14 and 16 are arranged horizontally or vertically can be applied.

The vulcanization pipe 14 forming the cross-linking zone has a bypass pipe 2 for partially extracting high-pressure steam inside.
0 is connected to the bypass pipe 20, and a blower 21 for taking in the high-pressure steam in the vulcanization pipe 14 and a heat exchanger 22 for condensing the taken-in high-pressure steam are provided in the bypass pipe 20. Therefore, the vulcanization pipe 14 to the bypass pipe 2
The high-pressure steam taken in 0 is cooled by the heat exchanger 22 and condensed. The condensed water of the high-pressure steam is introduced into the crosslinking residue separating apparatus 10 of the present invention through the drain pipe 23.

The cross-linking residue separating apparatus 10 according to the present invention has casters 24 at the bottom as shown in an enlarged view in FIG.
And a tank main body 26 provided with an opening 25 that opens upward. A water-permeable holding member 27 formed of, for example, a wire mesh, which is arranged across the opening 25 and is formed in a U-shape that opens upward, is arranged in the opening 25.

On the upper part of the tank body 26, there is provided a filter supply drum 29 for holding a strip-shaped long filter paper 28 made of a filter member such as nonwoven fabric in a wound state. The filter supply drum 29 is arranged at one side of the opening 25 so that the filter paper 28 held by the filter supply drum 29 can be sequentially drawn onto the holding member 27. Further, on the opposite side of the filter supply drum 29 across the opening 25, a take-up drum 30 for taking up the used filter paper 28 is provided with a holder 31.
It is located inside. In order to feed a new portion of the filter paper 28, that is, a new unused surface, from the filter supply drum 29 onto the holding member 27, for example, the take-up drum 3
0 can be rotated by a manual handle. Further, instead of the manual type, the winding drum 30 may be an electric drum.

A holding member 27 holds condensed water from the heat exchanger 22.
A drain pipe 23 extending from the heat exchanger 22 is connected to the top of a hood-shaped blow-out tube 32 arranged on the filter paper 28 in order to spread it evenly on the upper filter paper 28. An air filter 33 is provided at one end of the blow-out tube 32, and an exhaust pipe 35 provided with a blower 34 is connected to the upper end of the blow-out tube 32. On the outer peripheral surface of the blowing tube 32, for example, a filter paper 28
A handle 36 is provided for facilitating handling such as movement of the blowing tube 32 when feeding out.

The condensed water led from the drain pipe 23 to the top of the blow-out tube 32 is intermittently blown into the blow-out tube 32 at a high pressure of 8 to 15 kg / cm ² , for example, and is almost evenly blown in the blow-out tube 32. As a result, they fall substantially evenly on the filter paper 28 on the holding member 27. The filter paper 28 drops the water in the condensed water downward without passing the "tofu dregs" -like cross-linking residue mixed in the condensed water.

By the filtering action of the filter paper 28, the filter paper 28
The crosslinking residue accumulates on the upper part of the filter paper 28. Before the filter paper 28 is clogged by the accumulated crosslinking residue, it is desirable to feed a new surface of the filter paper 28 from the filter supply drum 29 onto the holding member 27. .

By the filtering action of the filter paper 28, foreign matters such as cross-linking residues can be removed from the condensed water to the extent that it can be discharged directly to the drainage channel, but in order to achieve a more complete drainage treatment,
As shown in FIG. 1, it is preferable that a tank chamber 38 be formed below the holding member 27 in the tank body 26, and that a precipitation tank 39 and a drain tank 40 be provided in association with the tank chamber 38.

A partition wall 41 is arranged between the tank chamber 38 and the settling tank 39, and the tank chamber 38 is located below the partition wall 41.
Also, a communication port 42 that communicates with the settling tank 39 is formed. Therefore, the water dropped downward through the filter paper 28 reaches the settling tank 39 through the tank chamber 38 and the communication port 42,
While passing over the overflow partition wall 43 and reaching the drainage tank 40, the filter paper 2 is provided at the bottom of the tank chamber 38 and the precipitation tank 39.
Even in the case of 8, fine particles of foreign matter that cannot be filtered can be settled. As a result, the condensed water of the high-pressure steam used for the cross-linking treatment is discharged from the drain tank 40 to the drain valve 4
Through the drain pipe 45 provided with 4, the water can be drained in a state in which impurities are extremely small.

The present invention is not limited to the above embodiments. INDUSTRIAL APPLICABILITY The cross-linking residue separation device of the present invention can be applied to various electric wire manufacturing processes that require cross-linking treatment in addition to CV cables. Further, the used portion of the filter member can be sequentially cut and discarded without winding the used portion with the winding drum. When the take-up drum is not used, the filter member is manually pulled out from the filter supply drum.

[0021]

According to the cross-linking residue separating apparatus of the present invention described above, the cross-linking residue mixed with the condensed water is separated by the filtering action of the filter member fed out from the filter supply drum onto the holding member. The crosslinking residue can be reliably removed from the condensed water with a very simple configuration without increasing the size of the apparatus.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view schematically showing a cross-linking residue separating apparatus according to the present invention.

FIG. 2 is an explanatory view schematically showing a part of a CV cable manufacturing line in which the crosslinking residue separating device shown in FIG. 1 is incorporated.

[Explanation of symbols]

 10 Crosslinking Residue Separation Device 11 Conductor 27 Holding Member 28 Filter Member (Filter Paper) 29 Filter Supply Drum

Claims (1)

[Claims] 1. A cross-linking residue separation device for separating the residue mixed with steam from the steam used for the cross-linking treatment of the uncross-linked insulating resin material covering the conductor of the electric wire during the production process of the electric wire, which contains the residue. A band-shaped filter member for filtering condensed water of steam, a water-permeable holding member for holding a filtering surface of the filter member, and a new surface of the filter member that can be sequentially drawn out on the holding member. A cross-linking residue separating apparatus including a filter supply drum around which is wound.