JPH0741054Y2 - Device for detecting cable position in bridge - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a device for detecting the position of a cable (in the vertical direction, not in the cable longitudinal direction) traveling in a bridge of an inclined type continuous bridge device. In particular, the present invention relates to the connection structure of the terminal portion of the position detection electrode.

[Prior Art] [1] Regarding Drive System of Inclined Continuous Crosslinking Device: First, the entire drive system of the inclined continuous crosslinking device will be briefly described.

FIG. 2 shows an example of the basic structure.

10 is a cable conductor, 20 is its sending machine, 22 is a sending and storing machine, 24 is a metering capstan, 26 is an extruder, 28 is a crosshead, and 12 is a cable core coated with an insulating layer. Is.

Reference numeral 40 is a vulcanizing cylinder, 30 is a tensioning capstan, 32 is a winding and storing machine, and 34 is a winding machine.

The cable core 12 is cross-linked in the first half of the vulcanization cylinder 40 and cooled in the second half; however, if it contacts the inner surface of the vulcanization cylinder 40 before the cross-linking is completed, the product will be defective.

The cable core 12 after cross-linking may be in contact with the inner surface of the vulcanizing cylinder 40. The point at which the cable core 12 contacts the inner surface of the vulcanizing cylinder 40 for the first time is the touchdown point P.

A cable position detector 50 is provided in order to prevent the cable core 12 from coming into contact with the inner surface of the vulcanization cylinder 40 during the cross-linking, that is, between the crosshead 28 and the touchdown point P.

The cable position detector 50 is provided substantially in the middle between the crosshead 28 and the touchdown point P, and the metering capstan 24 and the tensioning capstan 30 work based on the detection result to move the cable core 12 Vulcanizing cylinder
Position it in the vertical center of 40.

[2] Regarding the cable position detector: The cable position detector 50 described above is a known one, but will be briefly described.

As shown in FIG. 3, a cable conductor is provided by the high frequency coil 52.
An induced current 54 is induced in 10 and a secondary high frequency magnetic field 56 is induced around the cable conductor 10 by this induced current 54. The induced current 54 flows through a closed circuit of the cable conductor 10, the cable insulator, the cooling water in the vulcanizing cylinder 40, and the ground.

Electrodes 58A and 58B (for example, made of stainless steel) that intersect with the high-frequency magnetic field 56 are provided around the cable conductor 10 at two locations in the vertical direction in parallel with the cable conductor 10.

The value of the voltage induced in the electrodes 58A, B by the high-frequency magnetic field 56 is
It depends on the distance between the electrodes 58A, B and the cable conductor 10.

When the cable conductor 10 is in the center of the electrodes 58A, B, the electrodes 58A
And the induced voltage of the electrode 58B is equal.

Therefore, if the metering capstan 24 and the tensioning capstan 30 are adjusted so that the voltages of the electrodes 58A and 58B become equal, the cable conductor 10 becomes the vulcanization tube 40.
It will run in the center of the inside (up and down direction).

[3] Attachment of electrodes 58A, B: The electrodes 58A, B are attached, for example, as follows (FIG. 3).

The tubular bodies 41 and 42 of the vulcanizing barrel 40 are separated, and the flange 43 is provided on the one tubular body 41.

A flange 44 joined to the flange 43, a cylindrical portion 45 (integral with the flange 44), and a small flange 46 (integral with the cylindrical portion 45 and the cylindrical body 42) form an electrode extraction chamber 48.

The electrodes 58A and B penetrate the small flange 46 and are inserted into the electrode take-out chamber 48, the tips thereof are joined to the flange 44, and are grounded through the flange 44 and the cylindrical body 42.

The rear part (right side in FIG. 3) of the electrodes 58A and B goes out of the electrode extraction chamber 48.

An insulating layer 60 (for example, Teflon) is provided on each of the electrodes 58A and B.

A seal 62 is provided in the electrode extraction chamber 48. Also electrodes 58A, B
A seal 64 is provided at a portion that penetrates the small flange 46.

Attach terminal 66 to electrodes 58A and B (68 is a nut). 70 is a lead wire.

[Problems to be Solved by the Invention] As described above, the seals 62 and 64 are provided around the electrodes 58A and B. However, after the steam is injected into the vulcanizing cylinder 40 at the beginning of manufacturing, the seals are sealed. There is steam leakage until 62 and 64 have fully expanded thermally.

Further, even after the seals 62 and 64 have sufficiently functioned, vapor leakage between the electrodes 58A and B and the insulating layer 60 is unavoidable.

Since steam is corrosive, it corrodes the terminals 66 in a long time.

Then, the contact resistance increases and the position signal cannot be detected well, resulting in a product defect.

This invention improves the above points and prevents the terminals 66 from being corroded.

[Means for Solving the Problem] As shown in FIG. 1, a conductive sleeve is provided on the portion of the electrodes 58A, B outside the bridging cylinder and on the portion where the insulating layer 60 is removed.
72 is joined, and the cover 74 is joined to the sleeve 72 to form an airtight chamber 76, the lead wire 70 is electrically connected to the electrode in the airtight chamber 76, and the lead wire 70 is connected to the airtight chamber 76. Airtightly pull out from.

[Embodiment] As shown in FIG. 1, an electrode 58 protruding outside the electrode extraction chamber 48.
A linear sleeve 72 (for example, made of stainless steel) is joined to the ends of A and B. A sleeve cover 74 is joined to the linear sleeve 72, and the linear sleeve 72 and the linear sleeve 72 form an airtight chamber 76.

A terminal block 78 (for example, made of stainless steel) is provided in the airtight chamber 76, and the terminal 66 is connected thereto.

The lead wire 70 extends through the sleeve cover 74. A seal 80 is provided on the penetrating portion of the lead wire 70.

[Advantageous effects of the invention] A conductive sleeve is joined to a portion of the electrode outside the bridging cylinder and the insulating layer is removed, and a cover is joined to the sleeve to form an airtight chamber. Therefore, the corrosive vapor leaking from between the electrode and the insulating layer is diffused into the atmosphere when the insulating layer disappears and does not enter the airtight chamber.

In addition, the corrosive vapor that leaks at the start of manufacturing, in which the seal inside the electrode extraction chamber does not function sufficiently, does not enter the airtight chamber.

Therefore, the terminals of the lead wires electrically connected to the electrodes in the hermetic chamber do not corrode.

Therefore, the contact failure is eliminated, the position of the cable conductor 10 in the vulcanization cylinder 40 is accurately detected, and the reliability of the line drive system is dramatically improved.

[Brief description of drawings]

FIG. 1 is an explanatory view of an embodiment of the present invention, FIG. 2 is an explanatory view showing an example of a basic drive system of an inclined type continuous bridge device, and FIG. 3 is an explanatory view of a conventional technique. 10: Cable conductor, 12: Cable core 20: Feeder, 22: Feeder storage machine 24: Metering capstan 26: Extruder, 28: Crosshead 30: Tensioning capstan 32: Winding storage wire Machine, 34: Winding machine 40: Vulcanizing cylinder, 41, 42: Cylindrical body 43, 44: Flange, 45: Cylindrical part 46: Small flange, 48: Electrode extraction chamber 50: Cable position detector, 52: High frequency coil 54: Induced current, 56: High frequency magnetic field 58: Electrode, 60: Insulation layer 62, 64: Seal, 66: Terminal 68: Nut, 70: Lead wire 72: Straight sleeve, 74: Sleeve cover 76: Airtight chamber, 78: Terminal block 80: Sticker

Claims (1)

[Scope of utility model registration request] 1. A rod-shaped electrode with an insulating layer for inducing an electric signal corresponding to a vertical position of a cable running in a bridge in an inclined type continuous bridge device, wherein the electrode with the insulating layer is One end is pierced through the tubular body of the bridging cylinder, and the lead wire is connected to the portion that is protruding to take out the electric signal. A conductive sleeve is joined to a portion of the electrode outside the bridging cylinder and the insulating layer is removed, and a cover is joined to the sleeve to form an airtight chamber. Electrically connect the lead wire to the electrode,
A device for detecting a cable position in a bridging cylinder, wherein the lead wire is airtightly pulled out from the airtight chamber.