LU84309A1 - STATIC JOINT DEVICE FOR MULTIPLE PASSAGES IN PARTICULAR IN THE TRUNK OF A TIPPING METALLURGICAL CONTAINER - Google Patents

Description

STATIC JOINT DEVICE FOR MULTIPLE PASSAGES IN PARTICULAR IN THE TRUNK OF A TIPPING METALLURGICAL CONTAINER

The present invention relates to the field of static seals 5 which must allow the connection between a bundle of supply pipes coming from a fixed source of pressurized fluid and a bundle of operating pipes mounted on a support that can rotate.

The invention applies typically, but not exclusively, to tilting metallurgical vessels, such as steelworks converters, in which the arrival of refining fluids (gaseous or liquid) operates through trunnions for join blowing devices mounted in the bottom of the container.

It may in fact be sought to be able to individually control the flows of refining agents through each blowing member, without, however, intervention on the flow conditions of one of them resulting in a modification of the dynamic characteristics of the others / flow.

It therefore appears tempting to have a multi-pass trunnion equipment capable of ensuring the junction between the use pipes fixed on the wall of the converter and the supply pipes, an equal number, connected to fixed points power supply.

However, difficulties may arise. Indeed, if one seeks to break in a hollow journal of bore given the most A.

large possible number of independent flows, therefore of tubes, one quickly comes up against constraints linked to the inevitable presence of connecting pieces must the size saturates the availability of space well before reaching the maximum number of passages compatible with the pin size.

Learning from the state of the art in the field under consideration 30 has not made it possible to retain a fully satisfactory solution to this problem: On the one hand, it is not desirable to use rotary joints' nultipj- s integral with the journal (as described for example in Prevet 'J 3,477,766), first because of their own size, then ej because of the sealing problems that this poses.

On the other hand, the solution proposed in the French patent application r · "2.40e 996, consisting of having a single rotating joint with rik, tiplee olacé outlets at a height and at a distance from the trunnion, only makes 39; move the problem, without solving the question of the autonomy of the 2 different flows.

Furthermore, French Patent No. 2,253,093 describes a multiple-pass joint technique applied to the converter and certain provisions of which may constitute elements of response to the problem posed.

5 Indeed, this technique of the static seal type teaches that the use conduits secured to the container are connected to fixed supply points by flexible pipes wound on a drum secured to the container. However, the problem of space at the pin is left without a satisfactory answer, since the latter is replaced by a large diameter wheel cooperating with carrier rollers to allow the container to tilt.

The object of the present invention is to provide a tight seal with multiple passages, the number of passages is not limited by the size of the connecting pieces.

Another object of the invention is to achieve passing through the journal a high number of flows without having to substantially modify the existing equipment.

With these objectives in view, the invention relates to a static seal device for multiple passages, characterized in that it comprises a bored block of generally elongated shape having internally, on the one hand, blind longitudinal channels distributed in crown and opening on the same front face of the block, on the other hand, transverse channels connecting said longitudinal channels to the lateral surface of the block, on Λ.

which they open through openings offset from each other both in the longitudinal direction and in a direction perpendicular to this longitudinal direction.

According to one embodiment, the longitudinal channels are of unequal depth and the transverse channels open in the vicinity of, their bottom.

50 In a preferred variant, the longitudinal channels are divided into two identical families each forming a symmetrical half-crown from one another and each family is ordered, according to the unequal depths of the channels which compose it, according to an arrangement such that a given channel has a shorter and longer depth, respectively, than its two closest neighbors of 55 the same family.

The subject of the invention is also, and in combination: - a metallurgical receptacle equipped with blowing members in the bottom and tilting around support pins, at least one of which is tubular, has 3 - a drilled block such that defined above and mounted in the axial extension of the journal, the front face of the block where the longitudinal channels open being turned opposite said journal, - supply pipes connecting the transverse channels 5 of the drilled block to supply points fixed and, - use conduits integral with the container and connecting the blowing members fitted to the bottom of the container to the longitudinal channels through the trunnion.

According to a preferred embodiment, the drilled block is surrounded at a distance 10 by a drum on which the supply pipes are wound, this drum having an opening according to a generator, for the passage of said pipes in the direction of the drilled block.

The invention will be clearly understood and other aspects and advantages will emerge more clearly in the light of the description which follows, given with reference to the accompanying drawing boards in which: - Figure 1 is an axial section view of the block drilled according to the AA plane of FIG. 3, FIG. 2 is a side elevation view of the drilled block fixed to a converter trunnion shown in section, and ensuring the tight connection between the service lines and the supply lines. supply, - Figure 3 is a cross-sectional view along the plane BB of Figure 2, - Figure 4 is an enlarged partial view in axial section 25 showing in detail the mounting of the drilled block on the pin, - Figure 5 is an axial sectional view of the assembly of the multi-pass trunnion equipment according to the invention in its most complete variant, - Figure 6 is a front sectional view of the assembly shown on Figure 3, according to the plan EE, - Figure 7 is a cross-sectional view of the pin according to the plane DD of Figure 2 showing the structure of the bundle of tubes passing through it.

In the figures, the same elements are identified by identical references.

As can be seen, the drilled block 1, the general shape of which is elongated, internally comprises a first series of blind longitudinal channels 2 distributed in a ring around the axis 3 and a second 39 "series constituted by transverse channels 4 which join canals

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blind 2 near their bottom. The blind channels 2 open on the same flat end face 5 of the drilled block, while the transverse channels open on the side wall.

It is observed that the drilled block 1 has the general shape of a rectangular parallelepiped 5 of which only the two large lateral faces 6, 6 'are perforated. This is an alternative embodiment making it possible to have inlet pipes 7 which are identical to one another and therefore interchangeable.

According to the invention, the blind channels 2 are divided into two equal families, symmetrical to one another with respect to the vertical median plane AA (FIG. 3). Each family forms a half-crown of channels 2 (five in the example described), of unequal depths, and distributed in an orderly arrangement so that each channel has, with respect to its two closest neighbors of the same family, a depth 15 respectively shorter and greater. Thus, as can be seen, the channels 2 situated at the upper and lower ends of a half-crown / are respectively the shortest and the deepest, and one goes from one to the other in this order in passing through intermediate channels of increasing depth.

Since the transverse channels 4 communicate with the longitudinal channels 2 in the vicinity of the bottom of the latter, the outlet orifices of the transverse channels appear on the side faces 6, 6 ′ being offset from one another both longitudinally and vertically.

This feature, which is not of application limited to the parallelepiped shape of the drilled block, is an essential characteristic of the invention. As will have already been understood, it makes it possible to minimize the size of the connection flanges 8 of the supply pipe bundle 9, or, more precisely, to avoid this size imposing a limit on the number of channels blind 2.

| It is in fact understood that, thanks to these provisions, the only constraint in this regard is the minimum thickness of material which must be preserved between two neighboring longitudinal channels 2.

, Furthermore, it is advantageous if one wishes to reduce the volume of the drilled body as much as possible, to limit the spacing between two neighboring orifices | on the side faces 6,6 'at a value substantially equal to the width! connection flanges 8, as clearly shown in FIG. 3.

This determines the depth of each channel! 59 'longitudinal 2, which allows in particular to be able to eliminate the whole 5 upper part of the drilled block and reduce ai ^ if both the size and the material weight.

It should be understood that the production of a drilled block 1 with longitudinal channels of unequal depths constitutes a preferred variant, having regard to the advantages which have just been mentioned, but in no way limiting. It would be entirely in accordance with the invention to provide channels 2 of uniform depth, the invention in fact being carried out insofar as the drilled block has longitudinal channels 2 in a ring extended by transverse channels 4 which open laterally, according to available relative positions offset both longitudinally and vertically.

We will now describe a complete device for multiple passages in a hollow pin 10 of a metallurgical vessel by means of the drilled block according to the invention. Previously, it will be noted that the latter has on its front face 5 an axial opening 11 for the passage 15 of a fixing screw 12 whose head is accessible through the central recess 13 provided for this purpose. Likewise, two perforations 14 and 15 have been provided to facilitate assembly, as will be seen, the assembly with the pin 10. For a similar reason, more precisely relating to the difficulties of access to the inside of the pin 10 for placing in place of the conduits 20 for use (shown in 16), an intermediate sleeve 17 has been interposed between the trunnion and the bored block. Another role of the sleeve is to artificially lengthen the trunnion so as to allow the bending of the conduits d 'use 16 to group them together for their passage.

in the trunnion in a compact bundle, as shown in FIG. 7. In fact, taking into account, on the one hand, the distribution of the channels 2 in an annular ring and, on the other hand, the need to leave a certain thickness of material between these channels, it is understood that the pipes 16, coming in the extension of these channels, are spaced from one another and that it is advisable, before passing through the trunnion, to tighten them together to minimize their size.

In this respect, the configuration illustrated in FIG. 7 represents, for a given internal diameter of the journal, the best possible compaction of the bundle of pipes 16 when, as in the case of the example described, these pipes are in number of ten.

55 As can be clearly seen in FIGS. 2 and 4, the sleeve 17 is obstructed at its end by a perforated plate 18 by means of perforations 19 arranged in a crown according to an arrangement strictly identical to that of the blind channels 2 of the drilled block. Furthermore, a 39 'axial thread not shown is provided to receive the fixing screw 6 12 of the drilled block.

The inner face of the plate 18 receives the ends of the use pipes 16. Circular shoulders 20 inside the perforations 19 serve as abutment for the insertion to facilitate the mounting of the pipes. Furthermore, two centering pins 21 and 22 of different lengths protrude from the outer face of the plate 18 and, as described below, will facilitate the assembly operation by cooperating with the perforations 14 and 15 of the drilled block respectively.

Previously, it will have been noted that, on the one hand, the outer face of the plate 18 has counterbores 23 around the perforations 19 and that, on the other hand, these have a diameter greater than that of the channels 2 so as to receive sliding sleeves 24 which can come into contact with the front surface 5 of the drilled block 1.

Initially, the liners 24 are partially driven in so as to protrude at the surface by a length less than that of the shortest pin (pin 22) but still sufficient (for example 1 cm) to receive and maintain an O-ring d sealing, such as 25.

The mounting operation is then carried out in the following manner: the drilled block 1 is approached by first engaging it, by virtue of its perforation 14, 20 on the end of the longest pin 21 so as not to keep only one degree of freedom of movement to facilitate the completion of the assembly.

By then slightly pivoting the block 1 around the pin 21, one rapidement quickly manages to engage it on the short pin 22 which takes place in the perforation 15 of the block.

The centering operation being completed, it remains to secure the assembly by mounting the fixing screw 12. The final approach takes place gradually when the screw is screwed into the central thread * of the plate 18 and the seals 25, as well as the liners 24, JO being naturally put in place during the advance of the drilled block 1.

We can better understand the advantage of these sliding sleeves coming into abutment against the front face 5 of the block, by observing that in their absence there would be difficulties in correctly maintaining all the seals 25 in place during assembly.

35 In addition, these liners cooperate with the countersinks 23 to form annular grooves in which the seals 25 permanently take place. It will also be noted that the mounting technique which has just been described imposes on the liners 24 a length at most equal at the distance separating the 39 external surface of the plate 18 from the internal shoulders 20.

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According to a preferred embodiment of the invention (Figures 5 and 6), the drilled block 1 is placed in a guide drum 26 on which are wound side by side the supply lines 9. The diameter of the drum is determined according to the constructive characteristics 5 of the pipes 9 so as to impart to them a radius of curvature compatible with the manufacturer's specifications. The length of the pipes 9 is provided to allow the formation of a reserve loop (not shown) allowing the container to tilt around the axis 3.

Furthermore, as can be seen in FIG. 6, the drum 26 is provided with an opening 27 according to a generator for the passage of the pipes 9 towards the block 1. The front edge of the opening 27 is extended by tongues curves 28 and 29 each directed towards a lateral face 6 or 6 'of the drilled block and serving as a guide for the pipes.

Referring again to FIG. 5, it can be seen that the drum 26 is fixed by its front flank 30 to the sleeve 17. Of course, other arrangements can be adopted in this regard. For example, in the absence of the sleeve 17, the drum may very well be fixed directly to the drilled block 1 by any suitable means.

20 It will be observed that the use lines 16 join the blowing elements, not shown, located in the bottom of the metallurgical container, leaving radially from the pin 10 by means of an axial distributor 31 provided for this purpose on the front face turned opposite of the wall of the container visible at 32..

It goes without saying that the invention cannot be limited to the embodiment described above, but extends to multiple variants or equivalents insofar as the characteristics set out in the appended claims are respected.

Likewise, the scope of the invention encompasses not only the usual "bottom blown" steelworks converters, but also, and perhaps most importantly, certain top blown oxygen converters. "of a particular type. We are currently witnessing the industrial development of a new generation of oxygen lance converters (LD, LDAC, OLP, etc.), the bottom of which is provided with blowing devices for a stirring fluid. The latter can be injectors of the "nozzle" type or, more often, air-tight diffusers made of refractory material, therefore of the same nature as the conventional interior coating of the converter.

39 In accordance with the ripening process recently brought to the! *! 8 d public knowledge under the protected name "L.B.E.Process" I (Lance Brassage Equilibre), these blowing devices have the role of allowing direct introduction into the metal bath, in the same i | time that the blowing of oxygen from above, or at separate periods, I 5 of an inert stirring gas such as nitrogen, argon etc., or even I possibly reactive, for example of oxygen, if desired.

In any event, it seems desirable to have complete autonomy of the various gas flows between them in order to be able to regulate them individually.

It is under conditions and circumstances of this type that a preferential application of the present invention should be seen.

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Claims (7)

9 1. Static joint device for multiple passages characterized in that it comprises a bored block (1) of generally elongated shape having, on the one hand, internal blind longitudinal channels (2) distributed in a crown and opening onto the same front face (5) of the block, and, on the other hand, transverse internal channels (3) connecting said blind channels to the lateral surface (6,6 ') of the block (1) on which they open out through orifices offset from each other at 10 times in the longitudinal direction and in a direction perpendicular to the longitudinal direction. 2. Device according to claim 1, characterized in that the longitudinal blind channels (2) are of different depths and in that the transverse channels (3) open in the vicinity of the bottom of said w 15 blind channels. 3. Device according to claim 2, characterized in that the longitudinal blind channels (2) are grouped into two identical families each forming a symmetrical half-crown from one another and each family is ordered, according to different depths channels, in an arrangement such that a given channel has a shorter depth and a greater depth with respect to these two closest neighbors of the same family. 4. Device according to any one of claims 1 to characterized in that it comprises, in combination: a hollow journal (10 ") of a tilting metallurgical container extended axially by the drilled block (1), supply pipes (7, 9) connecting a fixed source of fluid to the transverse channels (3) of the drilled block and fixed use pipes (16) connecting the bottom of the metallurgical vessel to the longitudinal blind channels (2) by transversing the pin (10) 3) Device according to claim 4, characterized in that a sleeve (17) is provided between the pin (10) and the drilled block (1) and in that said sleeve comprises, at its end opposite the block drilled, a closing plate (18) having passages (10) arranged in a crown and extending the longitudinal blind channels (2) of the drilled block. 35 6) Device according to claim 3, characterized in that seals ( 25) are provided in countersinks (23) formed around the pa ssages (19), on the surface of the plate (18) in contact with the block (1) and in that sleeves (24) are slidably mounted in said 39 passages, sleeves having an outside diameter greater than the diameter "10 of the channels longitudinal blinds (2) and cooperating with the countersinks (2U to form circular grooves for housing the seals (25). 7. Device according to claim 4, characterized in that the 3rd drilled block (1) is surrounded at a distance by a drum on which come. 5 winding the supply lines (9) said drum having a longitudinal opening (27) for the passage of said lines. 8. Application of the device according to any one of claims 4 to 7 to a steelworks converter with oxygen blowing by lance, characterized in that the operating pipes (16) are connected to blowing elements housed in the bottom of the converter (32) for the pneumatic mixing of the metal bath. ! —Îv— J \ É! "- i I · f | t t A i! i {! l i i: î i i i r