EP0578680B1 - Slide bolt for melting pots - Google Patents

Abstract

A slide bolt for melting pots is disclosed having one bottom plate fixed to a bottom cartridge linked to the pot and a sliding plate arranged in a sliding cartridge and linearly movable with respect to the bottom plate, whereas the sliding cartridge is movable on guides linked to the bottem cartridge and two clamping members are symmetrically arranged with respect to the outlet for pressing the sliding plate against the bottom plate. In order to simplify the design of such a slide bolt and make the refractory plates more easily accessible, the sliding cartridge (26) has two rod-like guiding sections (25) arranged on its longitudinal sides that extend parallel to the axis of displacement and that are guided in two guiding blocks (19) arranged on both sides of the axis of displacement, symmetrically to the outlet (13), and are linked to the bottom cartridge (16) fixed to the pot. The guiding blocks (19) are movably mounted on the bottom cartridge (16) and receive the clamping members (23).

Description

The invention relates to a slide closure for melt vessels with a base plate arranged in a stationary manner in a base cassette connected to the vessel and with a slide plate arranged linearly displaceable relative to the base plate and arranged in a slide cassette, the slide cassette being movable on guides connected to the base cassette and two symmetrically to the pouring opening arranged clamping members are provided for generating a pressure of the slide plate against the base plate.

A generic slide closure is described in DE-PS 32 08 101, In the known closure, the slide plate is inserted into a support frame forming a slide cassette, which in turn is part of a separate slide carriage; the carriage is in turn guided in guides attached to a housing connected to the vessel and displaceable relative to the stationary base cassette. The clamping elements for generating the pressure of the base plate and slide plate are integrated against each other in the slide carriage.

The known slide lock has the disadvantage that the slide lock has a complicated structure with a comparatively large number of individual parts, which, in addition to a correspondingly high outlay for the production of the slide lock and the spare parts inventory, has the particular disadvantage that the handling of the slide lock when replacing the wear parts to address and made of a refractory base and slide plate is expensive. So with the known slide closure after loosening the tensioning elements, the guides for the slide carriage have to be removed from the vessel-fixed housing, the associated housing has to be partially dismantled and then the entire slide unit has to be removed from the housing before the wearing parts in the form of the base plate and the slide plate for a substitution is accessible.

Another disadvantage is that due to the clamping members arranged in the carriage, the pressure of the plates against each other in the different positions from slide to housing or from slide plate to base plate is subject to changes. In order to ensure a uniform surface pressure between the plates, in the known slide closure a complex entrainment device is provided for the slide plate or its supporting frame with respect to the slide carriage.

A comparable slide closure of another design is known from FR-A-2 308 448; with this slide closure, the slide plate is in a slide plate holder, which holder is in turn anchored in a carriage. The carriage in turn is slidably guided in a frame that is firmly connected to the vessel, the frame as such being designed to be foldable on the vessel. To generate the pressure, the frame is connected to the vessel by means of fixed screw connections. The disadvantages already described also apply to this known embodiment of a slide closure, namely a complicated structure and no uniform pressing of the plates when moving the slide plate to the base plate.

The invention is therefore based on the object to simplify a generic slide closure with regard to its manufacture and maintenance, to facilitate the replacement of the slide as well as the base plate and to ensure uniform pressure of the plates against each other during operation of the slide closure.

This object is achieved, including advantageous refinements and developments of the invention, from the content of the patent claims, which follow this description.

The invention is embodied in the basic concept that the slide cassette has on its longitudinal sides parallel to the axis of displacement two rod-like guide sections which are guided in two guide blocks connected to the vessel-fixed base cassette on both sides of the displacement axis and symmetrically to the pouring opening, and that the guide blocks on the base cassette are opposite it are movably supported and accommodate the tensioning elements.

This is initially associated with the advantage that, due to the direct mounting and guiding of the slide cassette via the guide blocks on the base cassette, an expensive slide carriage can be dispensed with, which not only considerably simplifies the construction, but also to facilitate handling of the slide closure when changing the bottom and the slide plate is connected. In particular, this eliminates the need to maintain a so-called slide workshop for servicing and maintenance of a complex mechanism of the slide closure. The simple construction realized with the invention with few components consequently causes only a low storage for the spare parts.

Due to the open design of the slide closure without framing, slide and the like, any external cooling of the slide components that is otherwise required can be omitted, since there is sufficient heat dissipation on all sides. At the same time, due to the simple mechanical construction of the slide closure according to the invention, a very high level of operational reliability is ensured even at high temperatures occurring on the components of the slide closure.

Since the clamping elements in the guide blocks and thus independently of the movement of the slide cassette are fixed in place to the pouring opening of the melting vessel, there is advantageously a uniform, linear contact pressure of the base plate and the slide plate against each other, the set contact pressure even with the greatest thermal expansion of one refractory material existing base and slide plate is evenly preserved.

Finally, it is advantageous that even with small dimensions of the melting vessel, for example for a quantity of melt of 0.5 to 5 tons, no slide components protrude under the vessel body, so that the handling of a melt vessel equipped according to the invention is significantly improved in steelworks and the use of such a melt vessel is possible in particular in narrow vacuum systems.

According to one embodiment of the invention, it is provided that the slide cassette has recesses running on the associated longitudinal sides between its outer corners and that the guide sections extend between the receiving blocks formed by the recesses on the corners and in this area run through guide openings in the guide blocks. Such a design is associated with a compact design because the slide cassette does not have any parts for guiding that extend beyond its given size. On the basis of the recesses formed in the slide cassette, the displacement path of the slide cassette is defined at the same time, the receiving blocks forming the limit stop on the guide blocks during the displacement movement.

According to a preferred embodiment of the invention, the guide sections arranged on the slide cassette are designed as separate guide rods which run through the guide openings of the guide blocks; at the same time, the slide cassette is detachably connected to one of the guide rods on the receiving blocks on at least one side. This advantageously results in the possibility, after releasing the associated connection of the mounting blocks and guide rod, of folding the slide cassette away about the axis formed by the other guide rod, so that a lock side and a hinge side are formed. This advantageously results in a very easy-to-use accessibility to the base plate and slide plate arranged in the base cassette and slide cassette. This eliminates the need for complex mechanics for changing the refractory plates, rather the plates are accessible in a very simple manner.

To form the releasable connection between the slide cassette and the guide rod on the lock side of the slide cassette, the receiving blocks are slotted on the lock side on their side facing away from the vessel, and at the same time the guide rods have flats in their area corresponding to the dimensions of the receiving blocks, which are smaller Have a distance from each other as the dimension of the slots. At the same time, the guide rod is preferably provided on the lock side at one end with a locking lever which is fixed in the locked position of the slide cassette with the guide rod in a holder arranged on the slide cassette. This results in a very simple way, by rotating the guide rod on the lock side by means of the locking lever, to bring the flats of the guide rod into alignment with the slots in the receiving blocks, so that the slide cassette with the receiving blocks can be folded down from the guide rod.

To further secure it is provided according to an embodiment of the invention that the guide rod on the lock side in the associated receiving blocks of the slide cassette is arranged to be longitudinally displaceable and in the locked position with its flattened cross-section is partially in the receiving blocks. In this way it is ensured that the associated ones even in the event of an accidental rotation of the guide rod Flattenings cannot penetrate through the slots in the receiving blocks; on the contrary, this is only possible if the partial sections of the guide rod provided with the flattened parts coincide with the extensions of the slots in the receiving blocks by prior longitudinal displacement of the guide rod.

According to a preferred embodiment of the invention, the two guide blocks for holding the guide rods and thus the slide cassette are held on the bottom cassette by means of pressure bolts, the tensioning elements designed as disc springs being pretensioned between the respective bolt head of the pressure bolts and the associated guide block. This ensures in a very simple manner that at the same time the slide cassette guided in the guide blocks is pressed against the floor cassette with the appropriate preload, and the required contact pressure can be adjusted in a simple manner by appropriate tightening torques of the pressure bolts or a replacement of the plate springs. In order to ensure the required parallelism between the bottom cassette and the slider cassette with regard to the required surface pressure between the bottom plate and the slider plate, the guide blocks are additionally held against the bottom cassette by guide pins arranged in them, so that an angular position of the slider cassette against the bottom cassette is excluded.

According to the invention, the base cassette and slide cassette have openings in a manner known per se for receiving the base plate and slide plate, which are made of a refractory material, the base plate and the slide plate being designed in an identical manner. This has the advantage that the Slider plates are interchangeable depending on their use and can also be used several times when turned. This is achieved in particular in that no special parts are required on the base plate in order to form it in adaptation to the base cassette, and that the same applies with regard to the tensioning elements with respect to the slide plate.

According to one embodiment of the invention, the thickness of the plate made of refractory material, which can be used as a base plate or slide plate, is somewhat larger than the height of the assigned openings in the base cassette or slide cassette, and this configuration ensures that the desired surface pressure mediated by the tensioning elements is exclusively realized on the bottom or slide plate and is not reduced by contact with other parts of the slide closure. At the same time, this measure reduces the friction to be overcome during the displacement movement, because only the base plate and slide plate made of a refractory material slide onto one another.

Insofar as a slide closure is additionally provided with an outlet sleeve arranged below the slide plate, as is known in principle from FR-A-2 308 448, according to one embodiment of the invention, the slide cassette has a holder for the holder of an outlet sleeve on its side facing away from the vessel on, wherein the sleeve carrier can be fixed in the holder in the manner of a bayonet catch. At the same time, the sleeve carrier can be used to carry a protective plate to be arranged on the underside of the slide closure, which protects the slide closure from the effects of heat and splashes. At the same time, the protective plate can be an assembly aid for the sleeve carrier when it is fixed in the holder that a simple replacement of the outlet sleeve is ensured in this way.

Fig. 1

den Schieberverschluß in dessen Offen-Stellung im Querschnitt,

Fig. 2

den Gegenstand der Figur 1 in einer Ansicht von unten.

In the drawing, an embodiment of the invention is shown, which is described below. Show it:

Fig. 1

the slide closure in its open position in cross section,

Fig. 2

the object of Figure 1 in a view from below.

Of the melt vessel 10, only its perforated brick 11 with base sleeve 12 and the pouring opening 13 arranged therein are shown in more detail in FIG. As the carrier of the slide closure, a base plate 14 is fixedly connected, preferably welded, to the bottom of the melt vessel 10, which base plate also receives the base sleeve 12.

A base cassette 16, which has an opening 17 for receiving the base plate 18 made of a refractory material, is fixed in place on the base plate 14 via bolts 15.

On the bottom cassette 16, two guide blocks 19 are held in a symmetrical arrangement on both sides of the pouring opening 13, each via a pressure pin 20 and two guide pins 21. The guide blocks 19 can be moved along the holding and guiding elements 19, 20 against the bottom cassette 16 by between the bolt heads 22 and the guide blocks 19 supporting, designed as plate springs clamping members 23 are provided. The guide pins 21 ensure a parallel alignment of the Guide blocks 19 to the bottom cassette 16, which is important for the mechanics of the slide closure, as will be described later; at the same time, the guide pins absorb restoring moments from the tensioning members 23.

The guide blocks 19 have guide openings 24 towards the pouring opening 13, in which guide rods 25 can be moved in a longitudinally movable manner. The guide rods 25 are connected to the slide cassette 26 aligned parallel to the base cassette 16, so that the slide cassette 26 is held and guided in the guide blocks 19 via the guide rods 25.

The slide cassette 26 has recesses 27 on its long sides pointing towards the guide blocks 19, as a result of which receptacle blocks 28 for connecting the slide cassette 26 to the guide rods 25 are formed on the outer corners. With regard to the accessibility of the plates arranged inside the cassettes 16, 26, the slide cassette 26 is detachably arranged on one side of the associated guide rod 25, so that here there is a lock side 30, while the other guide rod 25 forms a hinge side 29 which the slide cassette 26 can be folded down.

On the lock side 30, the associated guide rod 25 is mounted to be longitudinally movable and has at one end a locking lever 31 which can be pivoted with the rotatably arranged guide rod 25 and is fixed in the latched position in a pocket 32 formed on the slide cassette 26.

On the lock side 30 of the slide cassette 26, the associated receiving blocks 28 are slotted on their side facing away from the melting vessel 10, and the guide rod 25 has a flattened area 33 over a region corresponding to the dimensions of the receiving blocks 28, the diameter of the guide rod 26 in the area of the flattened areas 33 being somewhat smaller than the width of the slots in the receiving blocks 28, so that the slots and the flattened areas are aligned Passage of the guide rod 25 through the receiving blocks 28 of the slide cassette 26 is given on the lock side 30.

The slide cassette 26 also has an associated opening 34, in which a slide plate 35 is inserted, the base plate 18 and slide plate 35 having an identical shape, so that the plates are mutually interchangeable and can also be used in the reversed state.

A holder 39 is also attached to the slide cassette 26, in which a sleeve carrier 36 can be fixed in the manner of a bayonet lock, which in turn carries an outlet sleeve 37. A protective plate 38 is fastened to the sleeve carrier 36 and protects the slide from below from heat and splashes of the melt. As not shown further, the protective plate 38 can preferably be round and can be carried out in two steps, while at the same time it represents an assembly aid for the sleeve carrier 36 when changing the outlet sleeve 37.

The figures show the open position of the slide closure, in which the associated pouring openings in the perforated brick 11, the base plate 18, the slide plate 35 and the outlet sleeve 37 are aligned. If the slide closure is to be brought into its closed position from this position, the slide cassette 26 is shown in FIG. 2 displaced upwards until the receiving blocks 28 located at a distance from the guide blocks 19 strike the guide blocks 19. In this position, the slide plate 35 is displaced relative to the stationary base plate 18 in such a way that the pouring opening is covered in the base plate. The movement of the slide cassette 26 can be initiated by means of mechanical or hydraulic actuation devices (not shown in detail), the relevant drive systems being set apart from the slide closure and to be connected to it in a few simple steps. Due to the good accessibility of the parts of the slide closure and the lack of a complex mechanism or slide arrangement, the weight of the parts to be moved is comparatively low, so that the drive systems need not be so complex.

If the refractory plates 18, 35 inserted in the base cassette 16 or slide cassette 26 are to be changed, the preload in the region of the guide blocks 19 must first be eliminated by loosening the two pressure bolts 20. Then, on the lock side 30, the locking lever 31 is lifted out of the pocket 32 which fixes it and pivoted by 90 degrees, as a result of which the flats 33 provided on the associated guide rod 25 are brought into alignment with the slots in the receiving blocks 28. The guide rod 25 is then axially displaced until the sections of the guide rod 25 provided with the flats 33 have completely entered the receiving blocks 28. The slide cassette 26 can then be folded down on its opposite hinge side around the guide rod 25 located there are, so that now in the openings 17 in the bottom cassette 16 and 34 in the slide cassette 26 plates 18, 35 are freely accessible. After the corresponding change, the slide cassette is closed in reverse order and the lock side is locked, and after the pressure bolts 20 have been tightened again to the desired pretension, the slide lock is ready for operation again.

It follows from the above description that the simple mechanics of the slide closure only require short change times and that assembly errors due to the small number and simple assignment of the components to one another are almost impossible. At the same time, an adaptation to the local conditions with regard to the hinge side 29 and the lock side 30 of the slide lock can be made possible in a simple manner by the conversion with a change of sides of the associated guide rods 25.

The features of the subject matter of these documents disclosed in the above description, the patent claims, the abstract and the drawing can be essential individually or in any combination with one another for realizing the invention in its various embodiments.

Claims (15)

1. Slide closure for melting pots, with a bottom plate stationarily arranged within a bottom cartridge connected to the melting pot and a slide plate linearly displaceable relative to the bottom plate and arranged in a slide cartridge, whereby the slide cartridge is movable within guides connected to the bottom cartridge and in which two clamping members for generating a clamping pressure of the slide plate relative to the bottom plate, arranged symmetrical to the pour opening, are provided, characterized in that the slide cartridge (26) at its lateral sides parallel to the axis or displacement has two rod-shaped guide sections (25) guided in guide blocks (19), which are arranged on both sides of the axis of displacement symmetrical to the pour opening (13) and connected to the bottom cartridge (16) connected to the melting pot, and that the guide blocks (19) at the bottom cartridge (16) are displaceably secured thereto and receive the clamping members (23).
2. Slide closure according to claim 1, characterized in that the slide cartridge (26) at the corresponding lateral sides has respective recesses (27) extending between its outer corners and that the guide sections (25) extend between the receiving projections (28) defined by the recesses (27) at the corners of the slide cartridge (26) and within this area pass through guide openings (24) in the guide blocks (19).
3. Slide closure according to claim 2, characterized in that the stroke of displacement of the slide cartridge (26) is determined by the extension of the recesses (27) in the slide cartridge (26) and that the receiving projections (28) during displacement form the abutments for the guide blocks (19).
4. Slide closure according to one of the claims 1 to 3, characterized in that the guide sections (25) of the slide cartridge (26) are formed as guide rods supported within the guide blocks (19) and that the slide cartridge (26) is detachably connected with at least one guide rod (25) to the corresponding receiving projections (28).
5. Slide closure according to one of the claims 1 to 4, characterized in that the guide rods (25) are rotatably arranged relative to the slide cartridge (26) and that the slide cartridge (26) after release of the at least one detachable connection with one guide rod (locking side 30) is pivotable about the other guide rod (hinge side 29).
6. Slide closure according to claim 5, characterized in that the guide rod (25) on the locking side (30) at its free end has an arresting member (31) which in the locked position of the locking side (30) is secured in a pocket (34) provided at the slide cartridge (26).
7. Slide closure according to claim 5 or 6, characterized in that on the locking side (30) the receiving projections (28) are slotted on a side facing away from the melting pot (10) and that the guide rod (25) has a flattened section (33) in an area corresponding to the dimensions of the corresponding receiving projections (28) with a smaller distance than the dimension of the slots within the receiving projections (28).
8. Slide closure according to one of the claims 5 to 7, characterized in that the guide rod (25) on the closing side (30) is longitudinally slidably arranged within the receiving projections (28) of the slide cartridge (26) and that in its locked position the guide rod (25) with a cross-section having no flattened section is partially positioned within the receiving projections (28).
9. Slide closure according to one of the claims 1 to 8, characterized in that the two guide blocks (19) are supported via pressure bolts (20) at the bottom cartridge (16) and that the clamping members (23) in the form of plate springs are supported under prestress between the corresponding bolt head (22) and the guide block (19).
10. Slide closure according to claim 9, characterized in that the two pressure bolts (20) with clamping members (23) are Symmetrically arranged to the pour opening (13) whereby the connecting line between the pressure bolts (20) is arranged at a right angle relative to the axis of displacement of the sliding cartridge (26).
11. Slide closure according to one of the claims 1 to 10, characterized in that on either side of the pressure bolts (20) parallel to the axis of displacement of the slide cartridge (26) each guide block (19) is guided and positioned via a guide pin (21).
12. Slide closure according to one of the claims 1 to 11, characterized in that the bottom plate (18) and the slide plate (35) are inserted into corresponding openings (17, 34) of the bottom cartridge (16) and the slide cartridge (26) and have an identical shape.
13. Slide closure according to one of the claims 1 to 12, characterized in that the height of refractory bottom and slide plates (18, 35) is slightly greater than the height of the corresponding openings (17, 34) for receiving the plates (18, 35) in the the bottom cartridge (16) and the slide cartridge (26).
14. Slide closure according to one of the claims 1 to 13, characterized in that the slide cartridge (26) is provided with a holder (29) on a side facing away from the melting pot (10) for the sleeve support (36) of an outlet sleeve (37) arranged below the side plate (35) to which the sleeve support (36) is connectable in the manner of a bayonet closure.
15. Slide closure according to claim 14, characterized in that the sleeve support (36) at its lower end has a protective plate (38) for protecting the underside of the slide closure.

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