Sliding closure of metallurgical vessel exit

Abstract

A sliding closure (10) at the outlet of a metallurgical vessel is provided with a housing (12), at least one closing plate disposed inside, a closing plate displaceable in the longitudinal direction, and a cover (15) fixed to the housing (12) by a bracing mechanism (20). The closing plates can be pressed against each other by the bracing mechanism (20) through the cover (15). The bracing mechanism (20), having at least one spring member (33), is provided with a clamping lever (21, 22) pivotably received on both sides of the housing (12) and a support (23, 24) cooperating therewith, so that the cover (15) can be fixed to or released from the housing by rotating the clamping lever (21, 22). In this way, the closing plates, which need to be frequently replaced, can always be uniformly and optimally supported against each other even after many operational uses.

Description

Technology Field

[0001] The present invention relates to a sliding closure at the outlet of a metallurgical vessel having a housing, a closing plate arranged therein, at least one longitudinally displaceable closing plate, and a cover that can be fixed to the housing by a bracing mechanism. According to the preamble of claim 1, the closing plates can be pressed against each other by a bracing mechanism through the cover. Background Technology

[0002] A sliding closure known according to document EP-A-0 891 829 has a housing that can be fixed to a container, which accommodates a fire-resistant closing plate as well as fire-resistant closing plates fixed to the upper and lower parts. A slide plate that can move back and forth between them by a power device. The fixed closing plate is fixed to the cover or housing, while the slide plate is fixed to a metal frame connected to the power device. The cover is fixed to the housing in a manner that can be loosened by a clamping screw and is blocked by a blocking means in the direction of displacement of the slide plate that can move back and forth, while the same adjustment occurring perpendicular to the direction of displacement is possible. The problem to be solved

[0003] In another embodiment, a cover arranged on the upper side of the housing, together with a sliding closure having a casting tube exchange device, is pivotably housed in the housing, and a clamping screw pivotable in the housing is attached to the same to press together with the closing plate. However, these clamping screws must be tightened or loosened individually and must be tightened to a specific torque to operate without defects. means of solving the problem

[0004] The object of the present invention is that the cover is simply closed or opened in or by the housing to change the closing plate, and thereby the closing plate and, furthermore, the same thing is tightly enclosed by the housing and the cover during operation.

[0005] The above objective is achieved according to the invention according to the features of claim 1.

[0006] This bracing mechanism, in which a cover can be fixed to a housing, has a clamping lever pivotably accommodated on both sides of the housing according to the present invention, and a support member that cooperates with a contact surface associated with the housing or cover. Effects of the invention

[0007] In this way, by the bracing mechanism according to the present invention, the closing plates can always be uniformly and optimally braced against each other even after many operational uses.

[0008] Very advantageously, two clamping levers are pivotably accommodated on either side of the housing or cover, whereby they are arranged to pivot relative to each other or apart from each other on both sides. This enables uniform bracing of the closing plate.

[0009] The bracing mechanism has an adjusting member for the operation of each clamping lever, and this member is arranged to be laterally displaceable in a longitudinal direction across the bracing direction of the closing plate, and said member is connected to one clamping lever in an articulated manner at one end and preferably to a manually rotatable shaft at the other end.

[0010] The present invention and its additional advantages are described in more detail below using examples with reference to the drawings. Brief explanation of the drawing

[0011] FIG. 1 is a partial cross-sectional side view of a sliding closure having a bracing mechanism according to the present invention in an open state. FIG. 2 is a partial cross-sectional side view of the sliding closure according to FIG. 1 with the bracing mechanism in a closed state. FIG. 3 is a longitudinal cross-sectional view of a sliding closure according to FIG. 1, which is movable from the center and has a closing plate fixed at the top or bottom, and FIG. 4 is a bottom view of the cover of the sliding closure according to FIG. 1. Specific details for implementing the invention

[0012] FIGS. 1 to 3 illustrate a sliding closure (10) that may be mounted at the outlet of a metallurgical vessel, such as a distribution vessel, in a strand casting system for producing steel strands, in particular, and is not illustrated in further detail. In principle, the sliding closure may be used in other ways, such as a furnace in the non-ferrous metals for controlled casting of copper, for example.

[0013] According to FIG. 3, the sliding closure (10) comprises a housing (12) and a cover (15) connected by a hinge (11). An upper and lower fireproof closing plate (13, 16) as well as a longitudinally displaceable closing plate (14) are disposed therein. The closing plate is clamped to a plate frame (17) and can be moved to an open or closed position by a power unit (18) (not shown in more detail), and a corresponding through opening (18) is provided in the closing plate (13, 14, 16). An internal fireproof sleeve embedded in the container, although not shown, is typically connected to the upper closing plate (13). The lower closing plate (16') is extended by a sleeve-shaped protrusion. A fireproof casting tube or ladle shroud, etc., can be pressed over it to enable sealing casting.

[0014] The closing plates (13, 14, 16) are clamped to the housing (12) or cover (15) in a conventional manner, as described in detail in patent specification EP 2 670 546 B1.

[0015] The cover (15) is fixed to the housing (12) by a bracing mechanism (20), and thereby the closing plates (13, 14, 16) are pressed against each other through the cover (15) to ensure airtightness between them.

[0016] According to the present invention, the bracing mechanism (20) preferably has two opposing rotatably received clamping levers (21, 22) and a support (23, 24) cooperating therewith on both sides of the housing (12), wherein the clamping levers (21, 22) are each pivotally received in a central region on a rotation axis (26, 27) laterally in the housing (12), while the support (23, 24) is attached laterally to the cover (15).

[0017] The clamping lever (21, 22) is articulated at one end by an axis (28, 29) on an adjusting member (30) that can be actuated by an axis (34), and is equipped with a sliding element (21', 22') that grasps the lever. A support (23, 24) at the other end grasps the support during bracing and can rotate far when released.

[0018] Preferably, two clamping levers (21, 22) are arranged symmetrically on both sides of a housing (12) each having an adjusting member (30). The shaft (34) extends approximately across the width of the housing (12) and is coupled to the adjusting members (30) on both sides of the housing (12), so that when the shaft (34) is rotated, for example by a removable spanner, the clamping levers (21, 22) move simultaneously in the same direction on either side of the housing (12) and engage with or are released from the supports (23, 24).

[0019] Advantageously, the adjusting member (30) and the clamping levers (21, 22) are arranged on two opposing sides of the box-shaped housing (12) and extend parallel to the displacement direction of the longitudinally displaceable closing plate (14), while the hinge (11) and the power unit (18) are located on the narrow transverse side. Additionally, when bracing, the clamping levers (21, 22) are oriented in a longitudinal extension in the bracing direction of the sliding closure (10), as can be seen in FIG. 2, so that only a slight bending moment occurs.

[0020] Conveniently, depending on the range and tolerance of the closing plates (13, 14, 16) and the mechanism, inclined contact surfaces (23', 24') are positioned on each of the supports (23, 24) so ​​that they can be adjusted in one direction or the other while operating on these contact surfaces (23', 24'), and when bracing, each of the clamping levers (21, 22) engages approximately at its center.

[0021] Each contact surface (23', 24') of the supports (23, 24) has an inclination angle (α) of 0 to 40°, for example, 20°, so that sliding elements (21', 22'), such as rollers or hooks, run in the bracing direction of the closing plate during the closing process. The frictional force between the sliding elements (21', 22') and the supports (23, 24) varies according to the inclination angle (α). In practice, it has been shown that the best strength or friction ratio is produced at an inclination angle (α) of 0° or greater, preferably 10 to 45°.

[0022] The adjusting member (30) of the bracing mechanism (20) provided to actuate two clamping levers (21, 22) extends laterally from the housing (12) across the bracing direction or along the closing plate. This consists of a longitudinal guide element (32) having an integrated spring member (33) and a pivot lever (31) guided longitudinally therefrom. The guide element (32) is rotatably connected to one clamping lever (21) at one end via the shaft (28) and preferably connected to a manually rotatable shaft (34) at the other end outside the housing (12). It includes a rod having a connecting device for the clamping lever (21) on one side and a rail (32') having a receiver of the shaft (34) and a guide groove (39) for the shaft (29) of the pivot lever (31) on the clamping lever (22) on the other side. A spring member (33), designed as a compression spring, such as a helical spring, is pushed up from the rod, and the member is stabilized at the stop portion (36) of the rod and at a piston member (37) that can be displaced in a limited manner with respect to it. Additionally, the spring member (33) together with the rod is received in a protective channel (38) of the housing (12).

[0023] The shaft (34) received at the end of the rail (32') is also rotatably connected to the pivot lever (31) by a toggle lever joint (35). A bolt (31') at the end of the pivot lever (31). The latter is bent into a U-shape and thereby strikes the shaft (34) as shown in FIG. 2. This is measured so that the toggle lever joint (35) pivots outward through the dead. Automatic locking occurs when the cover (15) is fastened.

[0024] To close or open the cover (15), the shaft (34) is moved or pivoted manually or by a rotary drive (not shown), and the adjusting member (30) is moved or pivoted together with the clamping levers (21, 22) from the position according to FIG. 1 to the position according to FIG. 2 or vice versa. During bracing, the pivot lever (31) is pivoted against the shaft (34) by the toggle lever joint (35), and at the same time, the connected clamping lever (22) is pressed against the shaft (27) against the support (24) of the folded cover (15). By doing so, the pivot lever (31) is guided longitudinally with the shaft (29) into the guide groove (39) of the rail (32').

[0025] During pivoting, the guide element (32) is also simultaneously pushed into the housing (12), and the shaft (34) moves in the same direction. Thus, the other clamping lever (21) on the opposite side is pressed around the shaft (26) against the other support (23) of the folded cover (15). When the rod is pushed, the spring member (33) is similarly pushed by the piston member (37) against the stop (36), causing a spring compression force against the clamping levers (21, 22) and thus generating a bracing force on the cover and closing plate. The toggle lever joint (35) acts in the same way as the pivot lever (31) on the opposite side of the adjusting member (30), and locking occurs due to the pivot around the dead point where the bolt (31') is positioned behind the longitudinal axis of the guide element (32) in the bracing direction.

[0026] According to FIG. 4, the cover (15) consists of a cover frame (19) connected to the housing (12) by a hinge (11) and a closing cap (15') that can be placed on top of it. Supports (23, 24) that interlock with clamping levers (21, 22) of the plate (42) are attached to the outer side of the closing cover (15'). Preferably, a plurality of inconspicuous springs and guide means (41) are arranged between the closing cover (15') and the cover frame (19) so that the closing cover (15') can be displaced relative to it in the direction of pressure of the closing plate. The frame (19) and the housing (12) are covered in a limited manner.

[0027] Therefore, thermal expansion or exhaustion and tolerances of the fireproof closing plate and / or housing or mechanism can be generally compensated, and as a result, nearly equal compressive force is always generated. Using a spring further ensures that the cover frame (19) presses the rope seal (43, 46) integrated into the housing (12), which seals the entire space between the housing (12) and the cover frame (19), with nearly equal force at any time. Or, in a relative cover position, this rope seal (43) is thus continuously deformed and thus not subjected to excessive stress. In addition, it is likewise desirable to introduce a rope seal (46) throughout the entire space between the cover frame (19) and the closing cover (15).

[0028] The plate (42), which has supports (23, 24) on each outer side of the closing cover (15), is additionally provided with a centering element (44), and the centering element (44) is connected to the cover (15) and fixed in the displacement direction of the central closing plate (14).

[0029] The present invention is sufficiently disclosed using the above embodiments. However, it is obvious that it may also be carried out using additional variations.

[0030] Similar to conventional slide gate closers, it may include only two closing plates. It would be advantageous for the movable closing plates to be integrated inside a slider device that can be pushed in and out by a power device.

[0031] As a bracing mechanism, in principle, only a pivotally housingd clamping lever that needs to be oriented relative to each other may be provided on both sides of the housing.

[0032] The bracing mechanism described above can also be attached to a sliding closure rotated approximately 180°. That is, the adjusting member is attached to the cover, and the support is similarly attached to the housing. Instead of the housing, a clamping lever can be optionally pivotably received in the cover, whereby the clamping lever can pivot relative to each sliding element at its end and simultaneously engage with the contact surface of the support in the opposite case in the housing.

[0033] The inclined contact surfaces (23', 24') may also be designed as rollers, etc. Preferably, the sliding element of the clamping lever is provided as a hook with a flat bearing. This inclination angle (α) can theoretically be measured as 0°, and as a result, the sliding element runs across the bracing direction of the closing plate during the closing process.

[0034] In principle, the bracing mechanism having an adjustment member (30) and two clamping levers can be provided on only one side of the housing, while on the other side, a hinge for rotating the cover is provided on the housing.

Claims

Claim 1 A sliding closure at the outlet of a metallurgical vessel having a housing (12), a closing plate (13) disposed inside, a closing plate (14) movable in the longitudinal direction, and a cover (15) that can be fixed to the housing (12) by a bracing mechanism (20), wherein the closing plates (13, 14, 16) can be pushed against each other by the bracing mechanism (20) through the cover (15), wherein the bracing mechanism (20) having one or more spring members (33) is provided with a clamping lever (21, 22) pivotably received on both sides of the housing (12) and a support (23, 24) cooperating therewith, so that the cover (15) can be fixed to the housing or released from the housing by rotating the clamping lever (21, 22). Claim 2 A sliding closure according to claim 1, wherein clamping levers (21, 22) each accommodated in a central area are segmentally accommodated at one end of an operable adjustment member (30) of a bracing mechanism (20), and at the other end, a sliding element (21', 22') capable of engaging with each support (23, 24) is provided, so that the clamping levers can grip around the support (23, 24) when bracing and rotate in the opposite direction when released. Claim 3 A sliding closure according to claim 1 or 2, wherein two clamping levers (21, 22) are pivotally received on either side of the housing (12) or the cover (15), and in each case, pivotally gripping from both sides, either relative to each other or apart from each other, and simultaneously inversely, the cover is fixed to the housing or released from the housing in the housing (12) where the contact surfaces (23', 24') of the cover (15) or the support (23, 24) are present. Claim 4 In claim 2, each adjusting member (30) provided to actuate the clamping lever (21, 22) is arranged longitudinally in the housing (12) relative to the bracing direction of the closing plate (13, 14, 16), and one end is articulated to one clamping lever (21) and the other end is connected to a manually rotatable shaft (34) to actuate it, characterized by a sliding closure. Claim 5 In claim 4, the adjusting member (30) is composed of a longitudinal guide element (32) incorporating a spring member (33) and a pivot lever (31) that is longitudinally guided together with a toggle lever joint (35), wherein one end of the guide element (32) is rotatably connected to one clamping lever (21) and the other end to an axis (34), while the pivot lever (31) is connected to the axis (34) by one end of the other clamping lever (22) and the toggle lever joint (35) at the other end, characterized by a sliding closure. Claim 6 In claim 5, the sliding closure is characterized in that the toggle lever joint (35) moves around the axis (34) at the end and can rotate around the dead point when impact is applied, so that the cover (15) is automatically locked. Claim 7 A sliding closure according to claim 5, wherein each spring member (33) is stabilized in a guide element (32) and generates a compressive force on the clamping levers (21, 22) in the closing direction when the cover (15) is fixed to the housing (12). Claim 8 A sliding closure according to claim 7, characterized in that a spring member (33) designed as a compression spring is pushed up by the rod of a guide member (32), and said member is stabilized at a stop portion (36) on the rod and a piston member (37) that can be displaced in a limited manner with respect to it. Claim 9 A sliding closure according to claim 1, wherein each contact surface (23', 24') of the support (23, 24) is provided with an inclination angle (α) from 0 to 40°, and as a result, the sliding element (21', 22') of the clamping lever (21, 22) moves obliquely in the bracing direction of the closing plate (13, 14, 16) during the closing process. Claim 10 A sliding closure according to claim 1, characterized in that the closing plate (16) is fixed to a closing plate (13) and a cover (15) that are fixed to a housing (12) provided to a frame (14) that is longitudinally displaceable by a power device. Claim 11 In claim 1, the cover (15) is composed of a cover frame (19) coupled to the housing (12) and a closing cover (15') that can be placed thereon, and the support (23, 24) is characterized by a clamping lever (21, 22) being fastened to the outside of the closing cover (15'). Claim 12 A sliding closure according to claim 11, wherein a plurality of springs and guide means (41) are disposed between the closing cover (15') and the cover frame (19), and the springs and means allow the closing cover (15') to move within a limited range opposite to the cover frame (19) and the housing (12) in the compression direction of the closing plates (13, 14, 16), so that thermal expansion, exhaustion, and tolerance of the closing plates and / or housing or mechanism can be compensated, and as a result, the same compressive force also exists. Claim 13 A sliding closure according to claim 1, wherein each support member (23, 24) is attached to a plate (42) located outside the closing cover (15'), and the plate (42) is additionally provided with a centering element (44) that engages laterally, and there is no play in the recess (45) of the housing (12) so that the cover (15) connected to the plate (42) is fixed in the displacement direction of the central closing plate (14). Claim 14 A sliding closure according to claim 1, characterized in that rope seals (43, 46) are integrated into each of the housing (12) and the cover (15), and said seals seal the entire space between the housing (12) and the cover frame (19) or between the cover frame and the cover (15).

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