DE2222968B2 - Pipeline system for a vacuum degassing device for molten metal - Google Patents

Description

The invention relates to a pipeline system for a vacuum degassing device from Metal melt, consisting of a transportable pouring ladle into which the metal melt is fed via a Abslichrinnc runs in and which carries a cover with a piece of pipe that has more movable pipes with another pipe section that does not follow a possible vertical movement of the casting ladle is connected, the tubes being connected like a knee joint.

arranges and through vacuum-tight joints with each other and with the pipe section of the lid and the other Pipe section are connected.

* un such a pipeline system is known from the OE-PS 2 46 200; in this known pipeline system is a fixed on the lid of the ladle arranged fastening pipe provided, which via a flange connection in the actual pipe system passes, which comprises two movable main pipes, which then each with each other and with the other pipe sections on the ladle and a stationary vacuum layer via rotary or ball-and-socket joints Joints are connected. This OE patent also indicates the suction line to be built flexibly by yourself, i.e. obviously to be manufactured using bellows that are compatible with the Ladle are connected.

Because of the steadily increasing amount of material that is exposed to a degassing process must, the demands on the vacuum line system have also increased. There will be particular Larger, heavier pipelines are also required in order to avoid bottlenecks in the higher vacuum to be achieved of the pipeline system. However, if you use the bellows already mentioned, then this leads to only a low mechanical strength, they also tend to be brittle and suitable not suitable for rough operation, such as in the manufacture of steel. Such bellows are anyway because of the action of molten steel or its poor resistance to deformation not very suitable for this purpose. However, if large and heavy pipelines are used, then the above-mentioned OE-PS 2 46 200 results, for example, on the pouring ladle an uncontrollable torque. Overall, it can be assumed that the movements of the Tapping channel for the molten metal following pouring ladle that can be sensitively controlled in its own movement is additionally burdened by the heavy pipeline system connected to it. That means, that a pipeline system with a high throughput and correspondingly high weight ensures a stable position the ladle may be influenced to the point of tipping, which must be avoided at all costs.

The invention is therefore based on the object of a pipeline system for a vacuum degassing device of molten metal to create, which also, if very heavy and very large dimensions having pipes are used, allows so connected to the ladle that no forces whatsoever, either in the horizontal or in the vertical direction, are exerted on them and the piping system itself also without tension when the ladle moves remain.

To solve this problem, the invention is based on the pipe system initially assumed to be known and, according to the invention, consists in that the two movable pipes are of the same length and have sealing flanges arranged in a vertical plane, mutually displaceable and rotatable about their axes at both ends 90 ° pipe elbow, that on the moving pipe section closer to the fastening pipe section, a balancing with a vertically upward force (P) engages at a point in the longitudinal direction of the pipe by a predetermined distance from the connection point of the two moving pipes and that the fastening pipe section consists of two quickly detachable sections on the lid of the ladle.

A pipeline system for a degassing device has also become known from OE-PS 2 67 777, in which various pipes are connected to one another via 90 ° elbows and flanges. However, this is a pipeline system that is used for degassing during a mold casting process serves, wherein the casting unit is mounted on a frame together with a degassing chamber is, which is led along the Kokillen-Gteßstraße. The piping system itself needs For this, as can be seen, no vertical movements should be carried out, the flanges are all horizontal arranged and rotatable only in a horizontal direction. The entire system is rigid up on a vertically extending pipe section, which is telescopic and where a vertical Shifting by pushing pipe walls into one another is possible, which with the help of a motor-driven screw thread takes place. However, such a solution is not related to present invention.

Further refinements of the invention are the subject matter of the subclaims and are laid down in them.

The structure and mode of operation of an exemplary embodiment of the invention are illustrated below with reference to the following of the figures explained in more detail. It shows

F i g. 1 is a schematic front view of a piping system for a vacuum degassing device for molten metal,

F i g. FIG. 2 shows a schematic plan view of the pipeline system according to FIG. 1.

F i g. 3 is a schematic representation of the two movable pipe sections in the pipeline system to explain the mathematical analysis of the size and the starting point of the vertical suspension force for one of the movable pipe sections,

F i g. 4 is an enlarged plan view of the end portion of the movement of the ladle in FIG the end section of the pipeline system not following the vertical plane,

F i g. 5 is an enlarged side view of the end portion of the piping system of FIG. 4,

F i g. 6 is a cross section showing the rotatable mounting of the end section of FIG. 4 and 5 shows

F i g. 7 is a partially sectioned side view an applicable flange quick connector,

F i g. 8 is a cross-section of a pair of flanges which are arranged displaceably relative to one another and which are part of the pipeline system according to FIG. 1 and Z forms;

F i g. 9 is a schematic side view of the movable suspension device for a movable! Pipe section in the pipeline system;

Fi g. 10 is a schematic plan view of FIG tel to determine an inclination of the piece of rope, ai on which the movable piece of pipe hangs.

First, in the description of the Ausfüh approximately examples to FIGS. 1 and 2 reference is made men. The molten metal 3 is fed from a furnace 1 via a tapping channel 2 to a preparation plant lung ladle 4 tapped. This preparation ladle 4 sits vacuum-tight on the Dek

_kel7 , the vacuum-tight ^ X ^^ f ^ sysSn ί, ΪΑΑΑΪΑ pan 5 connected .st. 1The GidJpfanM 5 st mn yg flange quick connection 28 is provided with pre-supporting trunnions. The Z * P ^ n8 are _taken . The section 11 of the fastening pipe hook 10 (z. B. a crane) hung. nom ladle 5 connected, the evacuation of the ^ "^^ A ^ ShSd of section 33 of the fixing pipe piece-

A ¹ IU F.anschpairelZ, 13 and

SSSSvJ5 "*" * dt ™.-J £ y 5SiS3 ££ ¹⁰ "ZAED? Prepara _t ungsgieBpfanne4 and the pipeline ^ ^^ formed by the pipe pieces standing ladle 5 are comparison

“'» - «« _{eh gehl}

formed fasteners " ^CK ^" .. _{k 15} incurred than the previously known systems under

Rohrleitundgssystem ^ i movhche Rotetuck ^ lS ^ m ^ a ^ ^ f _{u especially d}

ΪGkSL? i ^ T ^ E & Ä £ if dL piping system has a large diameter ^ f

The end of this fixed knife. _j ^ ₂ ^

g ^. ^. _{bew ljche pipe sections 15 and i6} .

is the V «*« ^ ™ ^ «» ^ «^ _{16 have in} One can, however, possibly also have more than single-

\ v Ätsdbe Se and sS provide two movable pieces of pipe _{on theirs and they}

ATS » ^ £ * £% £ Ζ * £ Ζϊ

££% £ Ζ £ Ζϊ * * ■

on the P ^^^ T ^ Srallel rudder level 35 when a certain point on one of the two bever aufen. That means that sjeparaue! _removed pipe sections with a certain holding

Night smd m «toJjAtogJJ suspended force is suspended in the vertical direction. For the and those at the Aufhf ^ ™ ^ _ih % _L ^B _{e change} . _{The case of} two mobile tube pieces 15 and 16, while GießpfanneiS ^ of the ^{A "s lh} r ^e ^ ^^ ^ ug _{the same piece of pipe}

f ™ A ^ hSSS un ^ ßa ^ lStehenSe fastening 40 length / and 90 ° bends at both ends

ίί ^ vf ^ the harvest LwfgHchen Rohrstück 15, stand, which directly with the vacuum-tight, counter-

f ™ t in the way that bele pipe sections are connected in mutually displaceable flanges

ialn ^ enide ^ um'die Mhtelachse of the flange (see Fig. 1 and 2). results in the condition for a

lation zue ^{: m} ^ ' _H can however be such an equilibrium as follows:

SSäC ^ d ^ Schen the interior 45 In order to achieve this equilibrium, one must often

Compared to the outside atmosphere, the vacuum piping system that comes from the

Likewise, the section 33 of the fastening pipe piece connects one of the

dS first movable pipe section 15 coupling flanges of the flange quick connection

n ^ movable pipe section 16 and the 28, the movable pipe sections 15 and 16, the

Wan ^ clmaarl4 the second movable pipe section 16 50 fixed pipe section 17 and the opposite

with the fixed pipe section 17. on the movable vacuum-tight flange pairs

The above-mentioned pipeline system forms a 12, 13 and 14, in itself mechanically with

movable pipe connection, which is stretched and together with the help of a vertical support

Dewegiicne Ruiuvciu 5 »& _{b fc ft be balanced} ^ _{6 au {the} movable

^ SSi ^ Ä ^ 'S ₅₅ pipe section 15 acts at one point of the same.

^ SSebei ^ hÄ ^ eSlaufen.diepar ₅₅ pipe section 15 lies at a point des iuelΐ the verkalen plane, in which the out- If this is guaranteed and then the out; Pre-tap channel 2 of the furnace 1 and the pouring ladle 5 move preparation pouring ladle 4 and pouring ladle 5 without becoming an arrangement of bellows standing arrangement with the pipeline system, without imu c being connected, then both do not exercise on each other. 6 ° power off. From this it follows that the respective quick connection 28 daSi, the two sections 11 states of equilibrium are preserved and desnalb and 33 d ^ Sstigungsrohrstückes quickly with one - also no tendency of the preparatory pouring! ^^^ wSeStoll ^^ aiito to separate and pan 4 and Ladle 5 existing arrangement

"e

so that the entire '^^^^ i "^^; 6 ₅ " berries understanding of the equilibrium

ffiSSSsssais SSäEÄS

Control station.

7 ^v 8

is shown. Points B, D and C represent the central axis of the vacuum-tight

Centers of the vacuum-tight flange pairs 12, baren flange pairs 22 equal to that by means of the slide

13 and 14 respectively. The point A is the point of application, chung (1) certain distance λ \ the weight of the

at which the vertical counterweight 22 is equal to the force P as it is

hanging forceP on the pipe section 15 becomes effective. The 5 from equation (2) results. If the from ladle 5

Length sections HD and TJC represent the preparation and preparation ladle 4 existing arrangement

movable pipe sections 15 or 16 with the help of the crane according to an

The following equations then result change the position of the outlet trough 2 differently

(1) and (2), in which the sizes used follow, then the movable pipe section 15 and up

have low meaning: io also moved the pin 32 in this way. Since the carriage 24 is on the rails 26

Weight of the vacuum-tight flange also - namely the displacement of the pin

pair 12 or 13 2 W ₁ 32 following - can move, the wire rope remains

Weight of the portion 33 of the fastening _{18 zw} j _sc hen the starter pulley 21 and the fastening

supply pipe section including the ₁₅ part 29 always in the vertical direction. This is

Weight of the associated flange ensures that the suspension force acting on the

in the flange quick connection 28, the pin 32 acts, also always vertically directed

connected to section 33 .. W _{1 tet} j _st-

Length of the movable tube piece 15 _D j _e prescribed vacuum Entgasungsvorrich-

or 16 1 _{20 lun} g works satisfactorily if

The weight of the movable pipe section _{is> that during the} operation of the same the

15 or 16 ". W _{2 from} preparation ladle 4 and ladle 5

The angle between the length of the BD existing arrangement is not about its vertical axis

and the horizontal β _{rotates and also not} perpendicular to the vertical

Angle between the direction of the Lan- _{a5 plane in which it and the} outlet trough 2 through the

counterparts DC and the horizontal .. α suspension can be moved with the help of several wire ropes, swings back and forth. However, since the

_ AW ₁ + W ₂ + 2W ₃ ladle arrangement usually on one

^x ~ '8JP -jiyjy "' + 2W ~ single wire rope, it is

¹²³ 30 sliding of the ladle, causing the movement of the

p_ 8 W ₁ + 31 ^ 2 + 2 W ^ ₃ , outlet trough 2 follows, mostly inevitable that the

2 from preparatory pouring pan 4 and pouring ladle 5 existing Ladle arrangement more or less a rotary movement around the wire rope and / or

The entire system is therefore in equilibrium, an oscillating movement perpendicular to the vertical when the force P acts at point A. The plane in which the outlet trough 2 and the pouring ladle AnPpunkt A lies on the length segment TfD, the order is shifted, is exposed.
ie on the movable pipe section 15. Its result is that the stretch and condition of point D is determined by χ , the value .v collectible pipeline system, which only results from equation (1). The value of the force P 40 stretch in a predetermined vertical plane or results from equation (2). can be pushed together, inevitably in view of the fact that the above-mentioned oscillates perpendicular to this vertical plane. The NEN equations (1) and (2) neither of the wind would bring the disadvantage that depend on the buckle a nor on the angle β , it follows that the fixed pipe section 17 is strengthened and the pipe line is balanced - 45 great torque is exerted. This could be to system with any arbitrary position of the same during disturbances of the vacuum, so corresponding leak trend of its displacement as a result of a displacement and / or damage to the pipe sections and the pouring ladles 4 and 5 regardless of a change in the mutually displaceable, vacuum-tight Pbänder the angles λ and / 7 lead to the closing flange pairs,
can. 5 ° In order to eliminate this disadvantage, the FIGS. 1 and 2, the means for the suspension pipeline system are developed in such a way that the movement of the movable pipe section 15 is shown at a point exerted on the fixed pipe section 17 thereof. They consist of the torque that is absorbed by a rotating and / or wire rope 18, a supporting part 29, the two oscillating movements of which are generated by the pouring ladle arrangement with the flanges at the respective ends 55. The movable pipe section 15 provided for this purpose is firmly connected. 4 to 6 explained.

is, a fastening part 30, which is connected to the lower As shown in FIGS. 4 and 5, the end 19 of the wire rope 18 is connected and the pipe section designated by 17 in FIGS a frame 23, on which a pulley indicates that the designation "firmly attached 21 is attached and which on rails 26 with the help of net" means that this piece of pipe 17 can move back and forth with the movement of wheels 25; the ladle arrangement in the called the wire rope 18 on the pulley 21. Furthermore, a th vertical plane is not followed) in two sections counterweight 22 is provided, namely a main section 17 ″ and one end of the wire rope 18 firmly connected to the other 65 and is divided into section 17 '. Both sections are suspended from the middle of the other side of the rope pulley 21. In this case, a flexible pipe section 34, which acts as a bellows, is the distance between the pin 32 and the miter - is built, connected to each other. Sections Vi

9 10

and 17 "of the pipe section 17 are any overall arrangement formed on rings 36 and manure part 34

J6 'attached. Each of these rings 36 and 36 'is subjected to torsionally damaging mechanical stress

bar arranged on a solid base. This will. The aforementioned disadvantage of a perfect

rotatable mounting takes place, as shown in FIG. 6 too firmly arranged pipe section 17 is avoided,

see, with the help of a shaft 38 or 38 ', which on the 5 goes a rotary or oscillating movement of the casting

Ring 36 or 36 'is attached and then back to zero in a conical pan arrangement

Bearing part 37 passes over, which is also tapered by the springs 44 between the spring seats

see bearing surface 39 is included, which are arranged in 41 and 43, to this, also by the

a support 40 is provided. Sections 17 'and 17 "and the connector

Furthermore, the outer wall of the end portion 17 'io 24 is formed again in the original

between the ring 36 and the flexible piece of pipe lying back position.

34 fixed with two each having a recess Die F i g. 7 shows a quick flange connection

Spring seats 41 connected, which are attached to the outer wall of the sections 11 and 33, which together make the loading

End section 17 'of pipe section 17 form fastening pipe sections to one another. Such flange quick

Opposite and in a cross to the mentioned 15 connections are e.g. from DT-Gbm 18 93 352

known perpendicular plane extending plane arranged. So you can get two pieces of pipe with the help

are. Similarly shaped, also a deepening of a remote control very simple and reliable

identifying spring seats 43 are the spring seats 41 way to couple and decouple,

opposite on the walls of a depression F i g. 8 shows an advantageous embodiment of the

42 arranged. ao already mentioned several times against each other shift-between the spring seats 41 and the spring seats ble and vacuum-tight flange pairs 12, 13

43 springs 44 are added. The depression and 14.

42, on the walls of which the spring seats 43 are attached. takes the entire arrangement, which consists of the two tight flange pairs 12, 13 and 14 in the described Sections 17 'and 17 "and the way they are connected can be mechanical dung 34 exists. Load in the radial direction, but also the mechanical

As a result of the structure described, which absorbs the niche load very well in the direction of impact, both sections 17 'and 17 "and the connection, the arrangement formed by the ring groove, which accommodates the steel balls, results in a correspondingly deep cut when a torque is exerted on this arrangement in seal 69, which is displaceable in the direction of rotation, as a result of a rotary and / or oscillating movement of a vacuum seal of the interior of the pipe-pouring ladle, the line system opposite the end section 17 'and surrounding it the main section 17 "of the atmosphere, without any kind of mechanical" fixed "pipe section 17 now to be exposed to the stress. Therefore, the use is to swing pivot points which are defined by the bearing 35 by means of flange pairs formed in this way in association with the shafts 38 and 38 '. The flexible menhang with a vacuum degassing device pipe connection part 34 bends so that according to FIG. 1 and 2 extremely beneficial,
between these mutually rotating Ab- In FIGS. 9 and 10, an advantageous cut-outs 17 'and 17 "is a vacuum-tight connection formation of the carriage 24, the carrier holding attached to it remains. 40 frame and the pulley 21 arranged therein.

This has the effect that on no part of these the already briefly in connection with the F i g. 1

represented by the sections 17 'and 17 "and the connecting and 2, shown in detail.

For this purpose 3 sheets of drawings

Claims (5)

Patent claims: 1. Pipeline system for a vacuum degassing device for molten metal, existing from a transportable ladle, into which the molten metal is fed via a tapping channel enters and which carries a cover with an attached fastening pipe piece that over further movable pipes with another, a possible vertical movement of the ladle not connected to the following pipe section, the pipes being arranged like a knee joint and by vacuum-tight joints with each other and with the fastening pipe piece and the other Pipe section are connected, characterized in that the two movable Pipes (15, 16) are of the same length and at both ends over arranged in a vertical plane, Comprising sealing flanges which are displaceable relative to one another and rotatable about their axes 90 ° pipe elbow are connected that on the fastening pipe section (11, 33) closer movable pipe section (15) with a balancing (30, 32, 19, 18, 21, 23, 24, 22) a vertically upward force (P) on one in the longitudinal direction of the tube (15) a predetermined distance (λ) from the connection point of the two movable tubes (15, 16) attacks distant point and that the fastening pipe section (U, 33) on the lid (7) of the pouring ladle (5) consists of two sections (11, 33) that can be quickly detached from one another. 2. Pipeline system according to claim 1, characterized in that the in the vertical Flat non-movable pipe section (17) through an end section (17 ') and a main section (17 ") is formed, both of which are mounted rotatably about a vertical axis (36, 36 ') and with one another are connected by a bellows (34), and that oci uirc-Ki nut eaicm flange pair (14) in connection standing end section (17 ') also at a second, between the point of its rotatable Storage (36) and that of its connection with the bellows (34) located point at two each other diametrically opposite points is resiliently supported in the transverse direction (43). 3. Pipeline system according to claim 1 or 2, characterized in that the fastening pipe section consists of two sections (11, 33) which are connected to one another by a flange quick connection (28) are connected, which are attached to the two sections (11, 33) flanges (44, 45) is formed, which can be brought into vacuum-tight engagement with one another and which further on one of the sections (33) in the vicinity of the flange (45) connected to it along the Around the same, several C-shaped pressure clamps rotatably (46, 47) mounted on the flange (45) (48) on which just as many on the same section (33) attached (52, 53) hydraulic Attack cylinder (54) so that the pressure clamps (48) are in one position of the cylinder (54) bridge the two flanges (44, 45) and in their other position a separation of the Allow flanges (44, 45) from one another and that also to that of the rotatable bearing one of the sections (33) opposite end of the pressure clamps (48) is a further hydraulic cylinder (49) is provided on this in such a way that its piston is in the first-mentioned position the flanges (44, 45) can press against one another. 4. Pipeline system according to one of claims 1 to 3, characterized in that each of the movable pipe sections (15, 16) vacuum-tight against each other closing flange pairs (12, 13, 14) by a first flange (55) at one end of a pipe section (15) is attached, and a second flange (66) which is attached to one end of another pipe section (16) is formed and the first flange has a first annular projection (56) which extends in the axial direction and in the direction extends towards the opposite flange end face, and the second flange (66) has a second annular projection (82) which extends in the axial direction and in the direction of the opposite flange end face, the diameter of the second annular projection (82) being smaller than that of the first annular projection (56), and in the cavity formed between the two (56, 82) a vacuum-tight sealing ring (69) is angeor dnet and a ball bearing (60) is also provided, the inner bearing shell (57) of which is firmly connected to the first flange (55) and the outer bearing shell (62) to the second flange (66). 5. Pipeline system according to claim 1, characterized in that the at a predetermined Attacking point (32) of the pipe section (15) closer to the fastening pipe section (15) Balancing from one back and forth on a rail (26) and from one reversible motor (68) driven carriage (24) which has a cable (18) whose End at said point (32) is connected to the movable pipe section (15) and the other end of which is connected to a counterweight (2), the rope (18) being provided by sheaves (21), which are attached to the carriage, and also means (74, 75, 76) are provided to an inclination of the rope piece (18), which is between the pulley (21) and the point of attachment (32) on the movable pipe section. (15) is located opposite the vertical direction, and that control means (78, 79) are also provided, which in Depending on the rope inclination, operate the reversible motor (68) in such a way that the rope inclination is reducible.