JPH0119093Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Technical Field of the Invention) The present invention relates to a mounting part structure of a probe for measuring molten metal, etc.

(Background of the invention) An example of a conventional probe is shown in FIG. 4, and the probe 2 has a measuring element 4 for measuring molten metal, etc.
5 is a mounting cylinder 5 for a similar paper tube etc. at the upper end of the main body 3 such as a paper tube.
It is attached to the sub-lance 1 at.

When used for measuring molten metal in this state, for example, due to converter blowing, the molten metal scatters and adheres to the contact surface between the sublance 1 and the mounting tube 5, burning out the mounting tube 5 such as a paper tube and creating a gap. let

Furthermore, there may be a gap in the contact surface due to unevenness due to wear of the sub-lance 1 or bending of the sub-lance tip 10.

If these gaps exist, the molten metal is inserted into the gaps and cools and hardens to form the base metal 6.

When this kind of attachment of the base metal 6 occurs, the base metal 6 gradually increases with each measurement, and finally the probe 2 that should be used
The sub-lance 1 cannot be properly attached to the sub-lance 1, resulting in a poor electrical connection between the two.

In order to solve this problem, for example, as shown in FIG. 5, there is a known example in which seal packings 11 made of a fireproof material (such as asbestos) are molded into a disc shape are interposed at both ends of the probe 2. There is.

However, if the tip of the sub-lance 1 is irregularly deformed due to wear or the like, this seal packing, which has a wide upper end surface, does not have enough flexibility to follow such deformation, and it simply comes into contact with the deformed protruding surface. It has not been possible to completely seal the contact surface between the sublance 1 and the probe 2, and therefore the problem of the base metal 6 adhesion has not been completely resolved.

(Purpose of the invention) The object of the present invention is to solve the above-mentioned conventional problems and provide a structure for attaching a probe for molten metal measurement, etc., which does not create a gap on the contact surface with a sub-lance.

(Embodiments of the invention) The structure of the mounting portion of the probe of the invention will be described below according to the embodiments shown in the drawings.

FIG. 1 shows the mounting structure of the present invention, and the mounting structure 7 has a cylindrical main body 3 made of a paper tube or the like.

A ring-shaped seal body 9 is provided on the outer periphery of the upper end of the main body 3.
is protruded and fixed.

The sealing body 9 is made of a material that has elasticity, such as synthetic rubber (for example, neoprene rubber), generates gas at high temperatures, and remains as a carbide after the gas is generated.

The probe 2 having the above-mentioned mounting part structure 7 is mounted on the tip of the sub-lance 1 by an automatic mounting device when in use, but at this time, the elastic seal body 9 deforms following the deformed part of the tip of the sub-lance 1. Closely adheres to the contact surface and provides a sufficient seal.

In other words, even if the tip of the sub-lance 1 has such unevenness that a sufficient sealing effect cannot be expected even if a conventional disc-shaped seal packing 11 is used, the elastic ring-shaped sealing body 9 can be compressed. Since it is deformed by force and follows the state of the tip of the sub-lance 1, no gap is created on the contact surface.

In this way, the seal body 9 is made of a material that generates gas at high temperatures and remains as a carbide after gas generation, and generates gas when molten metal adheres to it, so the molten metal is scattered by the gas and adheres to the surface. Never.

Further, since the sealing body 9 remains as a carbide after gas generation and retains almost its original shape, no gap is created between the contact surface between the sub-lance 1 and the probe 2.

The mounting portion structure of the present invention may have the following configuration other than that shown in the above embodiments.

That is, as shown in FIG. 2, a ring-shaped sealing body 9 may be fixed by protruding from the center of the upper end of the main body 3.

Further, as shown in FIG. 3, a ring-shaped seal member 9 having a protruding annular portion on its peripheral edge may be protruded and fixed to the upper end surface of the main body 3.

Further, in the seal body 9 shown in FIGS. 1 to 3, it is desirable that the width t of the upper end contact surface be smaller than the wall thickness T of the main body 3 so that a concentrated compressive force is applied to enable large deformation. .

(Effects of the invention) The embodiment of the structure of the attachment part of the probe for measuring molten metal, etc. of the invention is as described above, and its effects are listed below.

(1) The structure of the mounting part of the present invention is as described in the claims for utility model registration.In particular, the seal body is made of an elastic material, so even if there are irregularities on the sub-lance or bends on the sub-lance tip, Avoid creating gaps on contact surfaces.

(2) The mounting part structure of the present invention has the same configuration as above, and in particular, the seal body is made of a material that generates gas at high temperatures and remains as a carbide after gas generation, so the gas prevents molten metal from adhering to it. There is no need to worry about gaps forming and metal being inserted.

[Brief explanation of the drawing]

Figure 1 is a longitudinal sectional view of the structure of the mounting part of the present invention, Figure 2
Figures 3 and 3 are longitudinal cross-sectional views of the structure of the mounting part of the same as above,
FIG. 4 is a front view showing an example of a conventional probe with its mounting portion cut away, and FIG. 5 is a longitudinal sectional view of the seal packing of the conventional probe. 1: Sublance, 2: Probe, 3: Main body,
4: Measuring element, 5: Mounting cylinder, 6: Base metal, 7: Mounting part structure, 9: Seal body, 10: Sublan tip part, 11: Seal packing.

Claims (1)

[Scope of utility model registration request] For measuring molten metal, etc., consisting of a cylindrical body and a sealing body that is fixed in a ring shape and protrudes from the upper end of the body and is made of an elastic material that generates gas at high temperatures and remains as carbide after gas generation. structure of the probe attachment part.