JPS5897629A - Temperature detector for preheating conductor - Google Patents

Abstract

PURPOSE:To detect the temperature of a preheating conductor accurately without damaging a running conductor even when wire diameters of conductors are changed, by specifying the fitting position of a detector so that the detection terminal of a conductor temperature detector is in contact with the surface of the running conductor. CONSTITUTION:In a case body 12 which has an entrance 10 and an exit 11 for a running conductor A, a couple of guide bars 13 are provided in parallel, and a detector supporting plate 14 is provided movably along those guide bars 13. The supporting plate 14 is provided with a conductor temperature detector 17 and a switch 18 for controlling the operation of an electrically driven cylinder 15. Then, the cylinder 15 is put in operation to move the operating piece 19 of the switch 18 forth until it abuts on the running conductor A, and thus the switch 18 is operated to stop a piston rod 16. At this time, the fitting position of the detector 17 is so specified that the detection terminal 20 of the conductor temperature detector 17 abuts on the surface of the running conductor A. Further, a pressing piece 24 for operating switches 21 and 22 is fitted atop of a rod 23 fitted to the supporting plate 14.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a temperature detection device that detects the temperature of a conductor before forming an insulating coating on the outside of the conductor.

As shown in FIG. 1, in the catenary type continuous cross-linking device, an extruder 2 applies an insulating coating to the outside of the conductor A supplied from a supply drum 1 a), and then introduces it into a cross-linked pipe 3. It is crosslinked and cooled, and then wound up on a drum 4.

By the way, in the above catenary type continuous crosslinking apparatus and the vertical type continuous crosslinking apparatus 8 (not shown in the figure), a preheating device 5 is installed at the front stage of the extruder 2 in order to increase the crosslinking efficiency of the insulation coating.
A method has been adopted in which conductor A is preheated by installing a

According to this method, the higher the preheating temperature of the conductor A, the shorter the time required for crosslinking, but if the temperature is too high, the insulating material will thermally decompose and its physical properties will deteriorate, so the preheating temperature is set to It is necessary to keep the temperature within a predetermined range within which the material does not decompose thermally.

Therefore, a method has conventionally been adopted in which the temperature of the preheating conductor is detected and the heating temperature of the preheating device is controlled based on the detected signal.

As shown in Fig. 112, conventional methods for detecting conductor temperature include a contact method in which the detection part 7 of the conductor temperature detector 6 is brought into contact with the surface of the running conductor A, and a non-contact method in which a radiation thermometer is used. However, the contact method described above has drawbacks such as the detection part of the detector being easily worn out (, η) and damaging the conductor. Furthermore, the latter non-contact method has the disadvantage that the temperature cannot be measured accurately because the emissivity of the conductor surface is low and the emissivity changes depending on the degree of oxidation of the conductor surface.

Therefore, the present invention solves the above-mentioned drawbacks and provides a device that can accurately detect the temperature of a preheated conductor without damaging the conductor, even when the wire diameter of the conductor changes, and can withstand long-term use. It is intended to.

In this invention, a conductor temperature detector and a switch for controlling the operation of the drive device of the support plate are attached to a detector support plate that is movable with respect to the surface of the preheating conductor, and when detecting the temperature of the preheating conductor, the conductor temperature detector is attached to a detector support plate that is movable with respect to the surface of the preheating conductor. When the switch attached to the support plate approaches or touches a conductor and is activated, the support plate is stopped and the detection terminal of the conductor temperature sensor is brought into contact with the conductor surface with a constant pressure. This is what I did.

The present invention will be explained in detail below.

As shown in FIG. 3, an inlet 10 and an outlet 11 of the running conductor A
A pair of guide rods 13 extending in a direction perpendicular to the moving direction of the running conductor A are provided in parallel inside the case body 12 having the following.A detector support plate 14 is movable along the guide rods 13. It is set in.

Although any drive device for reciprocating the detector support plate 14 with respect to the surface of the conductor A can be used, an electric cylinder 15 is used in the illustrated embodiment. The electric cylinder 15 is provided parallel to the guide rod 13 between the pair of guide rods 13, and has the tip of its piston rod 16 connected to the support plate 14.

A conductor temperature detector 17 and an operation control switch 18 for the electric cylinder 15 are attached to the support plate 14 .

The electric cylinder 15 is operated, the piston rod 16 is advanced, and the operating piece 19 of the switch 18 is brought into contact with the running conductor A. When the switch 18 is actuated, the piston rod 16 is stopped. At this time, the mounting position of the conductor temperature detector 17 is regulated so that the detection terminal 20 of the conductor temperature detector 17 comes into contact with the surface of the running conductor A.

The detection terminal 20 of the detector 17 is formed of a leaf spring (and
The ability of the detection terminal 20 to follow the conductor can be improved.

8. In the figure, 21 is a first switch that regulates the backward position of the piston rod 16 of the electric cylinder 15, and 22 is a second switch that regulates the forward position of the piston rod 16 when the running conductor A is not present in the case 12. A push piece 24 for actuating these switches 21 and 22 is attached to the tip of a rod 23 attached to the support plate 14.

The temperature detection device shown in the embodiment has the above-mentioned structure, and when it is necessary to detect the temperature of the conductor A, the detection terminal 20 of the temperature detector 17 is brought into contact with the surface of the conductor A.

Now, operate the electric cylinder 15 and move the piston rod 16.
When the detector support plate 14 is moved forward, the detector support plate 14 moves toward the surface facing the running conductor, and when the operating piece 19 of the switch 18 supported by the support plate 14 moves to a position where it comes into contact with the surface of the conductor A, the switch 18 is turned on, and at the same time, the detection terminal 20 of the temperature sensor 17 comes into contact with the surface of the conductor A, and the switch 1
8 causes the piston rod 16 to stop. Therefore, the detection terminal 20 of the temperature detector 17 is held in contact with the surface of the conductor A, and the conductor temperature is detected by the contact.

In addition, in the embodiment, the switch 18 is of a type in which the operating piece 19 comes into direct contact with the conductor, but the switch 18 may be replaced with a non-contact type such as a photoelectric type or a high frequency emitting proximity switch. It is possible.

As described above, according to the eighth aspect of the present invention, a conductor temperature sensor and a switch are attached to a detector support plate that is movable toward the surface of the running conductor, and the support plate is moved toward the surface of the running conductor. When the switch is activated due to proximity to or contact with a running conductor, the support plate is stopped and the mounting position of the conductor temperature detector is regulated so that the detection terminal of the conductor temperature detector comes into contact with the surface of the conductor. When detecting the conductor temperature, the detection terminal of the temperature detector can be brought into contact with the surface of the running conductor at a constant pressure.

Therefore, the temperature of the running conductor can be detected accurately, and damage to the conductor can be prevented.

Further, since the detection position of the detection terminal of the temperature detector is permitted upon activation of the switch, even if the wire diameter of the running conductor is changed, the temperature of the running conductor can be detected.

In addition, when warm detection of the running conductor is required, the output terminal of the temperature sensor is brought into contact with the running conductor.
Compared to a detection device in which the detection terminals are always in contact, the detection terminals suffer less wear and can withstand long-term use.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram of a catenary-type continuous crosslinking device, FIG. 2 is a front view showing a conventional temperature detection device, and FIG. 3 is a longitudinal sectional front view showing an embodiment of the temperature detection device according to the present invention. . 14...Detector support plate, 15...Cylinder, 16.
...Piston rod, 17...Conductor temperature sensor, 18
...Switch, 20...Detection terminal.

Claims (1)

[Claims] A drive device is provided by moving the detector support plate closer to and away from the running conductor, and a conductor temperature detector and a switch for controlling the operation of the drive device are attached to the detector support plate, and the switch is connected to the conductor surface. A temperature detection device for a preheated conductor, in which the mounting position of the conductor temperature detector is regulated so that the detection terminal of the conductor temperature detector comes into contact with the surface of the running conductor when the conductor temperature detector is operated in proximity to or in contact with the conductor.