DD208992A5 - VALVE TO CONTROL THE STITCHING OF MELTING STOPS - Google Patents

Abstract

THE FLOW OF THE METAL MELT FROM THE HOOD OF THE HOUSE INTO A CAST IRON IS CONTROLLED BY A VALVE WHICH IS MADE BETWEEN. THE VALVE CONTAINS A STATIONARY AND OPENED VALVE PLATE AND A COMPONENT PLATE FOR CLOSING OR OPENING THE OPENINGS FOR THE STROEMUNG. AN ACTIVE TRAITER MEMBER SHAPES A PART OF A PARALLEL MOVEMENT AND EXTENDS UP AND DOWN FROM THE SLIDING PLATE. THE COMPRESSION MEMBER IS PRESSED AGAINST THE SLIDING PLATE BY A PUSHING SPRING OF THE JOINT. A CAMERA-CONNECTED CAMS, A SHAFT AND A SWIVEL-LIFTED LEVER SHIFT THE RANGE IF THIS IS TO BE EXPORTED OR ACCOMPANIED, THEREFORE BEING PLACED THE COMPONENT IN A PREVIOUS MOVEMENT. HIS WEIGHTS WILL BE HELD FOR THE VALVE TO OPEN OR CLOSE. THE SOLUTION PROVIDES AN INCREASE IN PRODUCTIVITY. IT IS NOT LIMITED TO MELTS ONLY AND MAY BE VALUABLE FOR OTHER TYPES OF CAST PIPES, DIE CASTORS AND OTHER CASTINGS AND PEARS.

Description

2 3 3-483 7 ~ ^ή ^ c 21 B / 239 433/7

Berlin, 3-p. 1982 AP C 21 B, 60 804 2δ

Valve sum Control of piercing of furnace tap holes

Field of application of the invention

The present invention relates to a valve controlling the tapping operation at a container outlet, z, B, a blast furnace taphole.

Characteristic of the known technical solutions

When an arc furnace is tapped in a conventional manner, the molten metal and slag flow over the skin of the pouring lip as soon as the furnace is tilted. The metal and the slag then run, if one is provided, along a runner and collect in a ladle, The Schlakke coming out with is unadulterated. It would therefore be advantageous to empty the furnace only with respect to the molten metal and leave the slag behind.

By placing the tapping hole in the furnace well below its lid, the molten metal can be poured off alone when the furnace is tilted. However, a closure is required which has to close the taphole until the pouring is allowed to take place. It would be even better to have a valve which can be opened, closed and closed arbitrarily, since this would permit the filling of several ladles from a melt furnace charge. However, the furnace only needed to be tilted once, at the beginning of the Ausleervorganges.

In principle, a slide valve would be useful to control the 1, Ietallfluß from the tap hole. However, no

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known slide valve useful for this purpose. The known valve mechanisms require considerable space to each side, d. h, in the direction of the movement of the sliding valve plate, However, this space is missing in the region of the taphole of the melting furnace, since "here, for example 3, the melt channel is to be arranged.

Object of the invention *

The object of the invention is to provide a valve for controlling the metal effluent from a container outlet of the aforesaid kind so that the process of tapping the furnace or other analogous containers such as ladles, sprues and other pouring vessels can be made more productive,

Explanation of the essence of the invention

The invention has for its object to provide a valve for controlling the tapping at a container outlet, which aaptiert the concept of a slide valve so far that it is useful for a taphole of a melting furnace and at the same time to provide a mechanism with which the valve slide on the tapping hole is pressable and movable towards and away from the melt trough.

According to the present invention, there is provided a valve for controlling the flow of metal from a reservoir outlet consisting of a stationary valve plate having at least one opening and a sliding valve counter plate for covering or releasing the opening of the former so that the valve is closed or closed The valve according to the invention is characterized by an obliquely extending towards the displaceable Gegenullatte out and to their movement

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cogging actuator for moving the slidable plate, and spring means for urging the actuator against the slidable plate to press against the stationary plate. Further, means are provided, with which the actuating member is guided in a sliding movement along a predetermined YJeg, so that a portion of the actuating member which engages in the displaceable plate moves in a plane which is parallel to the contact surfaces of the two valve plates.

In a further embodiment it is provided that the. Guide means for the actuator consist of a parallel-motion joint arrangement, wherein the oblique employment of the actuator in the Yerschiebebewe-. is maintained between the open and closed position of the valve.

Sin another feature is that as a guide means for the actuator, a hinge assembly is provided, of which the actuator forms a part, and that the hinge assembly comprises a pair of reciprocally movable lever, which are pivotally connected to the actuating member and to a Advantageously, one of the levers is a spring strut and includes spring means which urge the actuator against the slidable plate,

Furthermore, it is provided that the spring means are articulated to an anchor, which of a support structure, ζ. Ral, Ralunengliedj is supported and with this over a Toggle or knee lifting Iraechanisrius is supported such that by releasing the anchoring and reducing the bias of the spring means the spring load of the actuator is degradable,

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Sine modification to this implies that the anchorage is arranged on a lever which. pivotally mounted on the frame member, but is normally prevented from pivotal movement by the toggle or toggle mechanism.

The valve is also characterized in that the spring means acting on the actuator are under compression and farther from the slidable plate than the other levers of the hinge assembly,

Sin another feature is that the pair of levers has such a length and that their Schwenlcverbindungen with the frame member and in relation. To the plane of the contact surfaces of the valve plates are arranged that the oblique employment of the actuator is maintained when the actuator between the opening and closing position of the valve is reciprocated,

Advantageously, an actuator for moving the actuator is provided, wherein the actuator may be a hydraulic or pneumatic working cylinder.

Furthermore, a feature of the valve is that the actuator is connected to a crank arm which is mounted non-rotatably on a shaft on which is fixedly mounted also one of the levers which is pivotally connected to the actuator, and Is mounted frame member,

Finally, the valve is characterized by its use for the tapping hole of a melting furnace facing a runner, with the actuating member extending obliquely upwards away from the runner, and with the heeling

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means and formed as a guide means hinge assembly on the side facing away from the runner side of the displaceable plate.

Although the present invention has been particularly described with respect to melting furnace, it is also applicable to other containers. The compact shape of the valve and its attachment to one side of the furnace outlet and its base structure, according to which the displaceable plate is pressably and arbitrarily movable back and forth, may also be valuable for other ladles, sprues and other pouring vessels or pears where liquid metal is tapped.

Ausführungsbeispie1

The invention will be explained in more detail below with reference to an embodiment. In the accompanying drawings show:

Fig. 1 is a front view of an arc melting furnace equipped with a taphole valve mechanism according to the invention;

ig. 2: a side view of the equipment of Pig. 1,

Pig. 3: an enlarged cross-sectional view of the device of the Pig. 1 and 2,

Pig. 4: a diagram from which the movements of the

Yentilmechanismu3 are visible in geometric representation.

Referring to Pig, FIG. 3, a taphole insert 10 is mounted in a furnace taphole, the insert 10 having an oval cross-section perfusion passage.

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has, stump and sealed abuts the insert 10, an intermediate tube 11 with a passage passage which changes its shape from an oval to a round cross-section. Eli nozzle piece 12 is stuck in the intermediate tube 11, and an indicated valve 14 is sealed at the end of the nozzle piece 12 which reads away from the taphole,

The valve 14 includes a stationary and an opening 18 having valve plate 15 of annular shape and a slide plate 16 of disk-shaped shape which is pressed against the valve plate 1.5, brackets 17 (Fig, 1) secure the valve plate 15 in its contact with the nozzle piece 12 » The slidable slide plate 16 is movable in an upward direction to expose the opening 18 of the stationary plate 15 and thereby open the tapping passage au. The slide plate 16 can be moved by an actuator 20 in this sense, which simultaneously serves- ¹ , the plate 16 against the valve plate 15 to press. As soon as the tapping channel is opened by lifting the slide plate 16, metal flows out of the melting furnace through the insert 10, the intermediate tube 11 and the stationary valve plate 15 from where it runs into a runner 21. The metal then flows along the channel into a receiving container or into a ladle.

Once the slide plate 16 has been moved all the way up that the valve 14 is open, it has traveled a distance which approximately corresponds to its diameter, the width of the annular plate 15 j d. Ii. the difference between its inner and its outer radius, is considerably smaller than this aforementioned distance, There are therefore provided means to support the slide plate 16,. when it is moved upwards, these means are a slide plate 22 adjacent to the plate 15 at

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The slide plate 22 and the stationary plate 15 have contact surfaces 24; 25) lying in the same plane.

The valve mechanism will be explained more clearly below with reference to Figs. 2 and 3,

The actuator 20 for the slide plate 16 performs two punctures aus.Zunächst loaded it the pusher plate 1 β against the stationary plate 15, due to the action of spring means 25 ^f, acting on the actuator. Furthermore, it is responsible to move the slide plate 16 when an actuator 26 is activated accordingly. Actuator 20 is a strut that is part of a link assembly 28 that is configured to move the lower handle of the actuator in a vertical direction as soon as actuator 26 operates.

As shown, the actuator 20 is inclined with respect to the vertical and also the frame member 23 obliquely. The lower end is coupled to the sliding plate. A bolt 30, which is received in a yoke 31, which is part of a shoe 32 which is fastened in a depression 33 of the slide plate 16 (Pig.

In a Swischenpunkt its longitudinal extent 13t the actuator 20 pivotally connected to a lever 34 which is fixedly mounted on a shaft 35, which shaft mounted on a second frame member 36 of the mechanism

The actuator 20 extends beyond the lever 34 and is at its upper end 38 mit.dem the frame member. 23 coupled. The pedestrian means 25 'which is a resilient

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The strut connect to the frame member 23 via a lever 39 '' and a toggle assembly 50, which will be discussed below. 'The pedestal means are pivotally connected to the opposite ends of the levers 39, 38.

The spring means. 25 'contain a variety of compression springs, z. B. ten or twelve, - which are screwed onto a corresponding plurality of bolts which secure a pair of pressure plates 42 at a distance from each other. Each of the printing plates 42 carries a protruding. Hinge pins 43, over which the spring means are coupled to the levers 39 and the end 38- In the working position shown in Pig »2 are .the. Spring means under.a pressure bias and therefore have the tendency to turn the actuator 20 counterclockwise about its pivotal articulation with the lever 34. In this way, the lower. End of the .betätigungsgliedes 20 pressed against the tap hole and also the slide plate 16 firmly and sealingly pressed against the stationary plate 15,

The pedal means 25 'also know sets of Tellerfedenr or ring springs instead of the coil springs shown contain.

To move the sliding plate between its open (raised) and closed (lowered) position, the actuator 26 is connected via a crank arm 46 to the hinge mechanism 28. The crank arm 46 is fixedly connected at one end to the shaft 35, on which the lever 34 is fixed. The actuator 26 is hinged to the counter opposite end of the crank arm 46 "As soon as this end is displaced upwardly, the" m mt, the actuator rotates feile 35 clockwise and ni the lever 34 in accordance with. This movement serves 20 to be changed

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push and also the slide plate 16 to open the valve to move up.

As the drawings show, the actuator 26 is a hydraulic or pneumatic power cylinder. This has a piston rod 47 which is articulated on the crank arm 46, the body 48 of the ArOeitsZylinders is articulated at the end facing away from the piston rod to a tab 49 of the frame member 23,

The use of such an actuator is common for the operation of pivotal or sliding closure elements. However, other actuators may be used instead of the one shown. For example, the crank arm 46 may be actuated by, or even replaced by, a manual control lever.

The hinge assembly 28, which consists of the actuator 20, the lever 34 and the IPedermitteln 25 ', operates approximately as a parallel motion drive, The geometry of the lever 34 and the spring means 25' is designed so that the '' Actuator 20 substantially In this way, the lower end of the actuator moves vertically with the slide plate When the slide plate is moved vertically over the actuator 20, there are only slight changes in the pressing force which are foreseeable within certain safe limits.

The spring means 25 'act in the articulated clianismus of the joint arrangement 28 as a swinging articulation. That is, the spring means 25 ^T swing .Jeweils in the same direction as the lever 34, to an anchor 51 at the free end of the lever 39, which in. Articulation point 52 is articulated to the frame member 23. In normal use, the lever 39

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However, the reaction force of the Pedermittel 25 'has the tendency' to rotate the lever 39 in the counterclockwise direction against a pivoting movement about its pin on the pivot point 52 by the toggle lever or toggle assembly 50-. However, this rotation is prevented by the arrangement 50, which acts as a rigid bond between the lever 39 and the frame member 23, by the abutment of the knob against a stop 53 "An overcentering of the knob would be required, γ / enn the lever 39 in the opposite direction would be movable about the hinge point 52, so that this movement is counteracted or even positively prevented by a removable safety pin 54. However, in normal use, the parts remain in the configuration according to Pig, 2, once the anchor 51st is fixed.

Occasionally it will be necessary to have one or both of the plates 15; 16 to replace. The pressure applied to the plate 16 by the spring means normally reaches 5 t when the Yent.il is closed. "This pressure must be relieved for retooling." This is achieved by releasing the anchorage by operating the toggle 50. for which the safety pin 54 is first to be removed. "Then crowbars are inserted into receptacles 56 at the ends of a rod that passes through the center of the knob 50 and forms its lance. Then the crowbars are lifted so that the knob 50 is raised is rotated beyond a mid-position and the lever 39 is allowed to pivot counterclockwise about its pivot at pivot point 52. This movement is accompanied by a relaxation of the pedal means 25 'which can then be released from the anchorage 51 for reasons of convenience. Once the effective in this direction Pedern have been relaxed, the actuator 20 can be Pivot away from the valve, so that more free

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The springs are reinserted and the pedal preload is restored in reverse order,

In the described Ausführungsfonn the hinge assembly 28 is similar to a parallel movement arrangement. And this is a Polge of the fact that the joints smschen the actuator 20, the lever 34 and the spring means 25 ^f is not along arc of equal radii about the mid-point of the shafts 35 and Anchorage 51 move. The geometry of this system, that is, the respective lengths of the levers 34 and the pedestrian means 25 'and the positions of their pivot centers by shaft 35 and anchoring 5 * also help to minimize changes in the oblique position of the actuator when "the As a result, the pressure acting on the sliding plate varies only within predetermined safety limits and reaches a maximum when the valve 14 is closed,

example

An example of the geometry of a taphole valve device according to this invention is given in Pig. 4 of the drawings.

In this example, the sliding plate of the valve is formed with a diameter in the range of 335 um and performs between the closed and the open position a stroke of approximately 320 mm.

The springs 25 'contain twelve helical compression springs, which are 385 mm in the relaxed state and 36 mm in the deformed state. The load on each peder is ca, 431 kg, so that the springs acting as pressure plates hinge pin 43 -lit total force of approximately 5 t

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(5080 kg) - With respect to the left front A of the frame member 23 and the center line of the drainage channel as reference lines, the mechanism has the following dimensions:

- The distance between the two pivot axes of the lever 24 is 632 mm. The pivot axis of Ü7elle 35 is 600 mm above B and 214 mm to the right of A.

Under normal operating conditions, the pivot axis of the anchorage 51 is 1116 mm above 3 and. lies 332 mm to the left of A,

The pivot point 52 of the lever 39 is located 80 minutes to the left of A and 1368 mm above 3,

- The knob 50 is connected by a pivot with a tab 58 which is arranged on the frame member 23. The pin has its center 80 mm to the left of A and 1017 mm above B, the connection between the toggle 50 and. the lever 39 is located 248 mm from the hinge point 52, the distance between the latter and the center, the fixed anchorage is 256 mm. The links of the cable assembly each have their two pin holes 125 mm apart,

The actuator 20 is 1100 mm long. The lever 34 is pivotable on the actuator 20 about a midpoint which is 580 mm from the distance of attachment of the pedestrian means 25 'and is also 25 mm away from the bolt 30 with which the actuator 20 is coupled to the slide plate 1b, The bolt 30 is located 170 mm to the left of A,

As soon as actuated, the lever 34 in the clockwise or counterclockwise on the 'parts 35 given away

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is, the operating member 20 is displaced in parallel substantially to itself. The engagement of its lower end extends in a vertical plane. The pivotable connection between the lever 34 and the actuator 20 moves along an arcuate path C, while the pivotal connection between the spring means 25 ^f and the actuator 26 extends along one approximately moves parallel curved path D,

The force exerted by the spring means 25 'on the actuator 20 force is greatest in the closed position of the valve. As soon as the valve is opened, the force decreases slightly as a result of the oscillatory movement of the spring means 25 ^r about the anchor 51, through which the angle between the spring means and the longitudinal axis of the actuator 20 changes. It follows that the force exerted in a direction normal to this axis of the actuator 20 drops to the slide plate 16 in the same way as soon as the valve 14 is opened.

The following list indicates the forces that act when the slide plate is moved from its closed position to the end 9 of its possible stroke, by evenly spaced intermediate positions.

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- 14 -

position

Spring force on the actuator, perpendicular to it

Tons kg

Sunn strength ai actuator and sliding plate v / effective

metric tons

kg

Pressure on the sliding plate, effective hormonal conon

Tons kg

9. 2.59 '2631 2.39 2936 2.62 2662 3 3.15 3200 3.51 3566 3.15 3200 7 3.60 3657 4.02 4084 3.55 36O7 6 3.98 4043 4.44 4511 3.90 3962 4.34 4409 4.84 4917 4.25 4318 4 4.60 4674 5.13 5212 4.50 4572 3 4.74 4816 5.29 5375 4.66 4735 2 4.35 4928 5.41 5497 4.30 4877 1 4.94 5019 5.51 5593 4.95 4663

In this embodiment, the mechanical degree of translation of the actuator 20 at 580/520 is 1.115 »

From the foregoing it can be seen that the means of pressing the slide plate 16 into its sealing contact with the stationary plate 15 and the means for 3eiseiteziehen the slide plate 16 to open the valve 14, on one side of the mechanism and therefore only on one Side of the pouring hole lie. The valve device is therefore particularly well suited for such conditions where the space is limited on one side of a pouring opening, therefore the use of this valve is not limited to tap holes of the melting furnace.

Many modifications are possible within the scope of the invention. For example, the actuator may also be other than via the lever 46 and the shaft 35 on the hinge assembly

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28 act. One possibility would be to couple the actuator direki with the bolt 30. In principle, the spring means 25 'can be made to act on the actuator 20 at any point between the lever 34 and the slide plate 16, but with the springs then acting as tension springs. The positions of the lever 34 and the spring means can then also be interchanged.

In the embodiment shown, the linkage is designed so that the lower end of the actuator 20 is moved vertically. In one variation, the hinge assembly 23 may also be replaced by a longitudinally extending guide, in which the lower end of the actuator 20 then moves.

In the melting furnace valve shown, the valve 14 and its actuating mechanism between the furnace wall and the trough 21, wherein the valve is connected via appropriate lines with the tap hole, the connection of the valve mechanism with the VJand of the melting furnace can be designed in various ways, so that a description of this attachment is probably dispensable here,

Claims (8)

60 804 26 48 3 7 Invention ρrucfa A valve for controlling the metal flowing out of a container outlet with a stationary valve plate having at least one opening and a counterplate displaceable thereon for covering and releasing the opening of the former to open the valve for flow or to close it against flow .by an obliquely against the displaceable counter-plate (16) extending and zv. the movement of which serving actuator (20), by the actuator (20) against the displaceable plate (16) biasing spring means '(25') »with which the displaceable plate (16) to the stationary plate (15) can be pressed, and by means (28) for guiding the actuator (20) in a translational movement such that a portion of the actuator (20) engaging the slidable plate (16) moves in a plane that is adjacent to the contacting surfaces of the valve plates is parallel. 2nd valve after point T ,. characterized in that the guide means for the actuator consists of a Paral-IeI-movement hinge assembly (28), wherein the oblique employment of the actuator (20) is maintained in the sliding movement between the open and closed positions of the valve, 3- valve according to the points 1 or 2, characterized in that as guide means for the actuating member (20) has a hinge assembly (28) is provided, of which the actuating member (20) forms a part, and that the hinge assembly (28) a A pair of reciprocally movable levers (34; 39) pivotally connected to the actuator and articulated to a rigid frame member (23) of the mechanism. 60 804 26 23 3 4 8 3 7 - "- 4 »Valve according to item 3, characterized in that one of the levers is a spring strut and contains the spring means which press the actuating member (20) against the displaceable plate (16). 5. Valve according to item 4, characterized in that the spring means (25 ') on an anchorage (51) are hinged, which by a support structure, for. B, frame member (23), is supported and with this via a toggle or toggle mechanism (50) such that by loosening the anchorage (51) and removing the bias voltage; the spring means (25 ^f ), the spring load of the actuator (20) is degradable. 6, valve according to point 5 », characterized in that the anchorage (51) is arranged on a lever (39) which is pivotally mounted on the frame member (23) but is normally prevented from pivotal movement by the toggle or toggle mechanism (50) . Valve according to items 4, 5 or 6, characterized in that the spring means (25 ') acting on the actuator (20) are under compression and further from the displaceable plate (16) than the other levers ( 34) of the hinge assembly (28). 8. Valve according to items 3 to 7, characterized in that the pair of levers (34; 39) has such a length and that their pivotal connections (35; 51) to the frame member (23) in such and relative to the plane of the contact surfaces the valve plates (15; 16) are arranged so that the oblique adjustment of the actuator (20) is maintained when the actuator (20) ZT / ischen the open- and closed position of the valve (14) reciprocated. 60 304 26 239483 7 - 18 - 9. Valve according to points 1 to S, characterized by an actuator (26) for moving 'the actuating member (20). 10. Valve according to item 9, characterized in that the actuator is a hydraulic or pneumatic working cylinder. Valve according to items 9 or 10 and items 3 to 8, characterized in that the actuator (26) is connected to a crank arm (46) which is non-rotatably mounted on a shaft (35) on which also one of the Lever (34) is fixedly mounted, which is pivotally connected to the actuating member (20), and that the shaft (35) is mounted on the frame member (23). 12. Valve according to the points 1 to 11, characterized by its use for a Gießrizme (21). facing tap hole of a melting furnace ',. said actuator (20) extending obliquely upwardly away from said runner (21) and wherein said spring means (25 ') and said linkage means (28) formed as a guide means lie on said runner (21) opposite side of said slidable plate , For this 4 pages drawings