JPS60166162A - Refractory frictional member for closing device of slide valve - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention is particularly directed to containers containing molten steel, which have coaxial flow openings for the passage of molten steel and which are connected to each other via sealing pieces. This invention relates to hole wear-resistant parts such as sleeves, plates, and tubes for valve closing devices.

PRIOR ART As can be seen, for example, from U.S. Pat. No. 3,841,539, it is common practice to seal the loosely fitting wear members (plates and sleeves) of sliding valve closures with mortar at the joint and surround them with a metal housing. It is being done. The mortar seam seals relatively reliably, but in the event of rapid wear of wear parts connected to one another, such as exit sleeves and sliding valve plates, which are mostly designed to be connected metallically, aging It has the disadvantage that it is troublesome to dismantle a member and then install a new member. There is some sealing mortar stuck to the remaining wear parts, which must be removed carefully and at a considerable amount of time before new mortar can be applied to the new wear parts. yes.

It is known from DE 17 58 960 A2 to press two hole-proofing elements in a sealing manner against each other via a spherically curved concave surface and a suitably shaped convex surface. , but such sealing is not applicable to the wear parts of sliding valve closure devices. In particular, it is not applicable there because the different thermal stresses present in the individual wear parts tear the relatively large sealing surfaces.

OBJECTS OF THE INVENTION It is an object of the invention to determine, for wear parts connected to one another in a sliding valve closing device, in particular for two wear parts having, according to experience, unequal service lives, the longitudinal axes of these wear parts. It is an object of the present invention to provide a mortar-free hermetic seal that allows for inclination tolerances.

According to the invention, this problem is solved in that the sealing piece is constructed as an interlocking rotating surface with a linear or band-shaped peripheral sealing piece. This construction, which is simple to carry out, allows the wear parts to be quickly and reliably connected to one another without the heavy expenditure of mortar. The resulting circumferential seal can withstand relatively large differential thermal stresses at the mutually joined ends of the wear parts without difficulty, i.e. it remains gas-tight even under various severe operating conditions and, moreover, Please make sure to adjust the slight difference later on the worn part.
To tolerate.

The peripheral sealing piece has an axis of rotation that coincides with the axis of the flow opening, and the angle between the axis and the gentle curve of the rotating surface is between 11'120° and 70°. It is preferable that the In this range, the risk that one of the wear elements involved in the sealing is damaged by the forces generated by thermal expansion or that the surrounding sealing piece is damaged at all is practically prevented. Furthermore, for strip-shaped peripheral seals, it is advantageous for the width of the peripheral seal to be no greater than half the distance between the angular values 20° and 70°, measured on the gentle curve of the surface of revolution. has become clear.

Regarding the formation of the contour of the rotating surface, according to the invention, the curves forming the rotating surface can be large arc-shaped curves and small arc-shaped curves, or the gentle curves can be straight lines and circular arc-shaped curves. . In all cases, a reliable linear circumferential seal is obtained which is responsive to actuation. For circumferential sealing strips, it has been found to be advantageous to give the gentle curve of the rotating surface the same curved profile over the sealing area.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention will be described below with reference to embodiments shown schematically in the drawings.

In FIG. 1, 1 indicates a ladle for molten steel, which has a metal plate outer skin 2, a refractory lining 3 and a perforated brick 4,
A sliding valve closing device 5 is connected behind this perforated brick. Closing device 5 includes an inflow sleeve 6 and a fixed bottom plate 7
and a sliding valve plate 8 and an outflow sleeve 9 which together with the sliding valve plate 8 are used to start, stop or regulate the outflow of molten steel.
It is moved at 0.

In order to throttle the outlet flow when the ladle is full at the start of tapping, for example, the outlet sleeve 9 has a covered flow opening in order to protect the sliding valve plate from premature wear. And if necessary, it can be replaced with a sleeve with a different cross section, which is the metal sleeve socket 1-1.
1, and this sleeve socket is attached to the holding frame 1.
0 can be connected in bayonet fashion with 0. In this case, the sealing between the outflow sleeve 9 and the sliding valve plate 8 is effected without mortar, the sleeve 9 fitting onto the frustoconical projection 8b of the plate 8, and this sleeve has an inner rotating surface 9a with an arcuate profile, which cooperates in a sealing manner with an outer spherical rotating surface 8a in the form of a linear circumferential moon.

In contrast to FIG. 1, FIG. 2 shows a tundish 12, which is used for tapping molten steel in a v-type, the metal plate outer skin of this tundish is shown at 13, and the refractory lining is shown at 14. The hole brick is shown as 15
It is shown in

A sliding valve closing device 16 is connected to this holed brick. This sliding valve closing device comprises an inlet sleeve 17, a fixed bottom plate 18, and a sliding valve plate 2 movable by a holding frame 19.
0 and a lower plate 21 with an outflow sleeve 22 held in a fixed position, the lower plate and the outflow sleeve being housed in a common frame 23. This frame is the holding basket 26
It has a flange 24 for connecting a tapping pipe 25 protruding into a mold (not shown) to the outlet 22 by means of a keying device 27 and a keying device 27. Outflow sleeve 22 and outlet pipe 2
5, as in the configuration according to FIG.
This takes place via rotating surfaces 22a and 25a which fit into each other and form a linear circumferential sealing piece, but in this case, contrary to the manner in FIG.
2a is provided on the outflow sleeve 22, and therefore on the side of the fitting wear part, and the funnel narrow surface 25a is provided on the enclosing wear member 111i, ie the outlet pipe 25.

The mortar-free sealing piece according to FIG. 2 is shown enlarged in FIG. Radius 29 and 30 with two projectiles
It can be seen that it is located in the angular range 28 of . Both radii belong to a circle 31 that crosses the circumferential sealing piece and intersect on the axis of rotation 32 of the rotation surfaces 26a and 27a. The angular range 28 lies between 30 and 70 degrees, measured from the axis of rotation 32.

FIG. 4 shows an embodiment with a wear part tA'33 that envelops the wear part, and the rotating surface 33a on the wear part side has an arcuate curve with its center point on the rotation axis 32, and the wear part side into which it fits 34, the arcuate curve of the rotating surface 34a is much smaller, so that it can be said to be a circumferential sealing piece with a spherical profile, in which line 8 sealing piece contact takes place in the above-mentioned angular range.

According to FIGS. 5 and 6, the peripheral sealing piece has a band-like profile, i.e. rotates about the axis of rotation 32 of the rotating surfaces 35a and 36a in the enveloping wear element 35 and the inset wear part 836; The two gentle curves with similar contours touch each other over a wider contour beyond the linear seal contact area, the length of the gentle contour curve of the rotating surface 36a being the extent to which the peripheral seal acts. Match the width. In this case as well, sealing takes place in the above-mentioned angular range, such that the band width is at most half the angle (i [measured between 30° and 70°) in the sealing range.

As can be seen from FIG. 6, in principle, the rotating surface can be replaced, and in this case, the enveloping wear part side 37 has a band-shaped rotating surface 37a, and this rotating surface is attached to the fitting wear member 3.
8 larger rotation iMt38a. Further, instead of the arc-shaped contour shown in the embodiment, contours such as a circular circle or a parabola can also be used.

[Brief explanation of drawings]

Figure 1 is a sectional view of the sliding valve closing device for ladle, Figure 2 is the sectional view of the sliding valve closing device for ladle.
A cross-sectional view of the tundish sliding valve closing device shown in the same manner as in the figures; FIGS. 3 to 6 are enlarged cross-sectional views of the left half of the sealing piece between the hole wear-resistant parts. 8a + 9a + 22a + 25a + 26a
+ 27a + 33a + 34a + 35a
+ 36a + 37a, 313a...Rotating surface agent Patent attorney Osamu Naka! ? 6-,. 2-” NigJ NiEZ?4

Claims (1)

[Claims] 1. A sleeve, a plate and a plate for a sliding valve closing device, in particular in a container containing molten steel, having a coaxial flow opening for passing the molten steel and being connected to each other via a sealing piece. In one fire suppression wear section such as a tube, the sealing piece is fitted with an interlocking rotating surface (8a +
9ai22a, 25ai26a+27ai33a+34
a; 35a, 36a and 37a+38a,) A fire-resistant wear member for a sliding valve closing device. 2. The peripheral sealing piece has a rotation axis that coincides with the flow opening axis (32), and a rotation surface (8a) that is formed with this axis.
l 9a ; 22a l 25a i 26a l
27a i 33a l 34a; 35a 136
Wear element according to claim 1, characterized in that the angle between the gentle curves of g and 37a138a) lies in the range between angular values 20° and 706. 3 The width of the surrounding sealing piece is the rotation surface (8a+9ai22a+
25ai26a+27a; 33a+34a15a+36
Wear element according to claim 2, characterized in that it is not greater than half the distance between the angular values 20° and 70', measured on the gradual curve of a and 37a + 38a). 4 The gentle curves of the rotation surfaces (33a and 34a) are
One of claims 1 to 3, characterized in that the curve is a large arc-shaped curve and a small arc-shaped curve.
Wear parts described in . 5 Rotating surface (8a125a127g and 9a + 2
3. The wear member according to claim 1, wherein the gentle curve 2a + 26a) is a straight line or an arcuate curve. 6. J1111a according to one of claims 1 to 3, characterized in that the gentle curve of the rotating surface (35a and 38a) has the same curve profile over the sealing area.