DE202005008037U1 - Position sensor for metallic rolling material used in rolling mills comprises a sturdy block made from a refractory material in which a wire loop with windings made from an insulated metal wire is embedded and the ends twisted - Google Patents

Abstract

Position sensor (1) for metallic rolling material comprises a sturdy block made from a refractory material in which a wire loop (2) with several windings made from an insulated metal wire is embedded and the ends twisted.

Description

at the positioning of glowing Rolling stock in rolling mills for the purpose of determining the lengths of the blank and the location of contact elements are used, the rolling stock mechanically switched on or off directly.

adversely in this solution is that as a result of mechanical contact and high temperatures these elements constantly renewed because of wear after a short time Need to become. The resulting financial loss is not only through determines the part renewal, but also by the decommissioning the plant.

With the use of photoelectric sensors is another technical solution the position determination of the rolling stock applied.

Of the Disadvantage of this variant is that the light barrier optics and quickly contaminate the reflectors and thereby operate insecure.

Of the in protection claim 1 specified invention is based on the problem to provide a position sensor without mechanical contact, in Dusty environment and responsive in the high temperatures.

This Problem is solved with the features listed in protection claim 1.

The The invention relates to a wire loop that, in a block embedded, is positioned at a predetermined distance to the rolling stock. The beginning and end of the loop are connected to an electronic evaluation unit. in which an electrically evaluable signal changes its state at the output, if the rolling stock passes the loop or remains in its area.

An embodiment of the invention will be described with reference to 1 and 2 explained. Show it:

1 the position sensor 1

2 the arrangement of the position sensor 1 with the rolling stock 6 on transport wheels 7 lying and the direction of movement 8th The position sensor 1 will, as in 1 as follows: An insulated metal wire designed for extreme temperatures becomes a coil with several windings in the form of a coil 2 wrapped that ends 4 have a corresponding length. The ends 4 are twisted along their entire length. For use in extreme heat areas and to achieve a firm fixation, this wire loop becomes 2 to a block with refractory mass 3 shed. Care should be taken that the potting compound 3 evenly spaced the loop 2 wrap. In order to increase the mechanical strength of the block, there is the possibility of reinforcing material made of stainless steel, which at the same time as the basis for the loop 2 can be used to embed.

Over the twisted ends 4 becomes the position sensor 1 with an electronic evaluation unit 5 electrically connected.

The basic overall arrangement of the modules is in 2 shown.

The position sensor 1 is positioned in the transport path so that no contact with the rolling stock 6 can be done. But it must be ensured that the distance of the rolling stock 6 in the detection range of the sensor 1 enough.

The function of the position detection is the following: The wire loop 2 of the position sensor 1 forms with an electronic module in the electronic evaluation unit 5 a resonant circuit, which is automatically tuned when no rolling stock 6 within the detection range of the loop 2 located.

Will the rolling stock 6 through the transport rollers 7 in the transport direction 8th moved, the resonant circuit is detuned when the rolling stock 6 the area of the loop 2 has reached.

At this moment, the output signal of the evaluation unit changes 5 his condition. This change is used as a control variable for downstream aggregates, such as the transport system of the roles 7 , used.

1

position sensor

2

wire loop

3

sealing compound

4

twisted end up

5

electronic evaluation

6

rolling

7

transport wheels

8th

transport direction

Claims (2)

A metallic rolling material position sensor apparatus characterized in that the position sensor is a solid block consisting of a refractory mass in which a multi-turn wire loop of an insulated metal wire designed for extreme temperatures is embedded and its ends twisted are. Device according to claim 1, characterized that the position sensor in conjunction with a downstream at a temperature protected place set up special electronic evaluation device in extreme Temperature ranges contactless detects the rolling stock, and that at the moment of capturing an output signal change on the evaluation unit takes place, with which electrical systems can be controlled.