JPH0119092Y2 - - 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.

If this state is used for measuring molten metal, for example, the molten metal will scatter due to converter blowing and adhere to the contact surface between the sublance 1 and the mounting tube 5, burning out the mounting tube 5 such as a paper tube. bring about

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

If there is a gap between these two, molten metal is inserted between the two 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 a seal packing 11 made of a fireproof material (such as asbestos) is molded into a disk shape is interposed on the end face 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 11, which has a wide upper end surface, does not have enough flexibility to follow such deformation, and the seal packing 11 simply comes into contact with the deformed protruding surface. , the contact surface between the sublance 1 and the probe 2 could not be completely sealed, and therefore the problem of the base metal 6 adhesion had not been completely solved.

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

(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 width t of the upper end contact surface of the seal body 9 is smaller than the wall thickness T of the main body 3.

Further, the seal body 9 is made of a fireproof material (for example, asbestos, ceramic fiber, etc.).

When molding and processing the seal body 9, since the material is brittle and easily generates dust, paint, inorganic binder, rubber, etc. may be applied or impregnated as necessary.

When the probe 2 having the above-mentioned mounting part structure 7 is used, it is mounted on the tip of the sub-lance 1 by an automatic mounting device, but at this time, the upper end contact surface of the seal body 9 is deformed following the deformed part of the tip of the sub-lance 1. ,
Adhere to their contact surfaces and seal sufficiently.

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 upper end contact surface of the seal body 9 is highly concentrated. Since it deforms due to compressive stress and follows the state of the tip of the sub-lance 1, no gaps are created on the contact surface.

In this way, the seal body 9 is made of a refractory material, and since molten metal does not adhere to the surface and the seal material 9 is not burned out, there is a gap between the contact surface between the sub-lance 1 and the probe 2. It never occurs.

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 seal member 9 whose upper end contact surface width t is smaller than the wall thickness T of the main body 3 may be fixed by protruding from the center of the upper end of the main body 3.

Further, as shown in FIG. 3, a protruding annular portion is provided on the peripheral edge, and a ring-shaped sealing body 9 is provided on the upper end surface of the main body 3, and the width t of the upper end contact surface of the protruding annular portion is smaller than the wall thickness T of the main body 3. It may be fixed by protruding.

(Effects of the Invention) The embodiment of the structure of the attachment part of the probe for measuring molten metal, etc. of the present 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, and in particular, the width of the upper end contact surface of the seal body is made smaller than the thickness of the main body and protrudes in a ring shape. Even if there are irregularities on the sub-lance or bends in the tip of the sub-lance, the upper end contact surface deforms to follow the irregularities, so that no gaps are created on the contact surface.

(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 fireproof material, which prevents molten metal from adhering to it, and also prevents the formation of a gap, which may cause an accident where bare metal is inserted. There isn't.

[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] A seal body for measuring molten metal, etc., consisting of a cylindrical body and a seal body fixed to the upper end of the body, whose upper end contact surface has a width smaller than the wall thickness of the body, protrudes in a ring shape, and is made of a refractory material. Probe attachment structure.