RU2685620C2 - Device for lifting and lowering of ladle, installation with such device and method - Google Patents

Abstract

FIELD: metallurgy.SUBSTANCE: invention relates to metallurgy and can be used for lifting and lowering of ladle for treatment of liquid metal in it by means of processing device. Device comprises at least three vertically oriented metal posts, at least two horizontally oriented bars, wherein each crossbar connects two metal posts and is fixed on them, two transverse beams, each of which in vertical direction is movably connected to one of the crossbeams, at least one positioning element for moving the corresponding transverse beam, each positioning element is connected by one end to one of the crossbeams, and by another one with one of transverse beams with possibility of transverse beams movement independently from each other, bucket receiving element connected to corresponding transverse beam, by means of which bucket is taken, and at least one positioning device for orientation of position of said bucket catching element.EFFECT: invention makes it possible to use positioning elements of smaller dimensions with lower power consumption, which can be serviced or replaced independently.18 cl, 9 dwg

Description

The invention relates to a device for raising and lowering a bucket for processing liquid metal in it by means of a processing device. The invention further relates to an installation for treating a liquid metal, in particular, to an installation for its degassing, such as an Ruhrstahl-Heraeus installation (RH installation), with such a device. In addition, the invention relates to a method for treating a liquid metal in a ladle by means of a processing device and to a method for replacing a processing device in such an installation.

To improve the quality of metals, they are processed, if necessary, in the molten state. A known treatment method is, for example, degassing a liquid metal in order to remove residual oxygen and / or other gases from the molten metal. This method is carried out, as a rule, in the RH-installation. To this end, the liquid metal is positioned in a so-called casting ladle (hereinafter simply referred to as “ladle”) under the processing device. A treatment device, such as a treatment unit with a vacuumized interior space, has at its bottom, at least one inlet and, as a rule, also an outlet. For processing the liquid metal in the bucket, it is placed, in particular sucked, through the inlet to the inner space. For this, the bucket is usually lifted by the device, so that the inlet and, on occasion, also the outlet can sink into the liquid metal, and during processing no air can penetrate into the inner space. In the processing device, the metal is processed, in particular, degassed, and after the processing process flows back to the ladle. The latter is then lowered down again.

WO2012000218 A discloses a bucket lifting system comprising a frame structure lifted by means of hydraulic cylinders. Frame construction, like a bucket filled with liquid metal, has a large own weight and requires correspondingly powerful lifting cylinders.

The objective of the invention is to create a flexible and inexpensive device and a suitable method for lifting the bucket. In addition, the object of the invention is to create an easily maintained installation, including such a device.

This task is solved in part of the device for raising and lowering the bucket for processing liquid metal in it by means of a processing device, and such a device includes:

- at least three vertically oriented metal racks,

- at least two horizontally oriented crossbars, each crossbar interconnecting two metal stands and attached to them,

- two transverse beams, with each transverse beam in a vertical direction movably connected to one of the crossbars,

at least one positioning element for moving the corresponding transverse beam, with each positioning element being connected at one end to one of the crossbars and the other to one of the transverse beams in such a way that the transverse beams are movable independently of each other,

- connected to the corresponding cross beam element for taking the bucket, through which the bucket is taken, and

- at least one positioning body for orienting the position of the corresponding element for taking the bucket.

The proposed device has the advantage that, compared with the known devices, the lifted weight is markedly reduced and therefore smaller positioning elements with lower power consumption can be used. While in the state of the art, heavy and rigid frame structures are often used as part of the device, light and movable independently transverse beams are used here, which themselves and their positioning elements can be serviced or replaced independently of each other.

At the same time, it has proven itself if metal racks are provided at one of its ends for fixing in the base. In this case, the base can be formed by the foundation, the supporting structure, the floor of the workshop, etc.

Preferably, at least one of both ends of each transverse beam is guided along a vertical guide. This reliably prevents the horizontal beams from swinging or tilting in the horizontal direction. Damage to at least one positioning element connected to the crossbeam is reliably prevented. It is especially preferable to guide both ends of each crossbeam along the respective guide.

Each rail has, in particular, a longitudinal axis running parallel to the longitudinal axes of the metal struts. Preferably, each rail is made in one piece with the metal stand. For this, the latter may have a groove for engagement, in which the end of the crossbeam is guided. Alternatively, the guide can be mounted on a metal rack at a distance from it or mounted on a crossbar or on the base without connection to the metal rack.

In one preferred embodiment, the device includes four metal racks. When viewed from above, they are located, in particular, at the corners of the rectangle. However, a device with three metal pillars also proved to be, and they then, when viewed from above, are located at the corners of an isosceles or equilateral triangle.

Only one or several positioning elements can be provided for each transverse beam. However, in particular, two positioning elements are provided. This ensures their mutual safety in case of failure or failure of one of them, and the transverse beams fixed on them are protected from uncontrolled vertical movement.

Preferably, the transverse beams also contain, at least one at a time, also a movable element for taking the treatment device, and it is taken by these elements. For optimal movement of each element for taking the treatment device, there is preferably at least one additional positioning element, respectively. The elements for taking the treatment device are used when service or replacement of the treatment device is required. Details of the principle of operation of elements for taking the treatment device are given below.

The positioning element for moving the transverse beam and / or the additional positioning element for moving the element for taking the treatment device is preferably in the form of a hydraulic cylinder.

Alternatively, the positioning element for moving the transverse beam can also be formed by at least one cable drive system.

The invention is also solved by installation for processing liquid metal in the ladle containing the proposed device and processing device, and the processing device is detachably mounted on metal racks and / or on the crossbar of the device. The installation has the above-mentioned advantages of the device and, as an option, provides a quick and inexpensive possibility of replacing the treatment device.

Advantageously, the processing device is fastened with fastening means on metal racks and / or on crossbars, as well as on other parts of the installation, which can be activated and separated, in particular, automatically by means of remote control. This ensures quick connection and disconnection of the treatment unit in case of maintenance without the need for personnel.

The installation further comprises preferably a conveying system for transporting the bucket in the conveying device, in particular in the carriage, to the treatment device. In the case of a trolley transporting device, a rail system is required along which the trolley moves. Alternatively, an autonomous vehicle that transports a bucket under the treatment device can also serve as a transport device.

In one particularly preferred embodiment, this is an installation in which the treatment device is intended for the degassing of the liquid metal. The preferred installation is an RH installation. In this case, the treatment device has an evacuated inner space, which is connected to at least one part of the installation, including at least one vacuum pump. In particular, the connection is realized by one or several pipelines that connect the inner space with at least one vacuum pump.

The method of treating the molten metal in the bucket by means of a processing device proved to be preferable, with the bucket being raised by the proposed device so that the liquid metal in the bucket can be processed by the processing device. In particular, the processing device thus has an inlet and an outlet, and the bucket rises so much that both holes are immersed in the liquid metal.

However, the method is particularly preferred for replacing the treatment device in the proposed installation, which includes the following steps:

- attachment of elements for taking the treatment device to it,

- separation of the processing device from the metal racks and, if necessary, from other parts of the installation connected to them,

- actuation of the positioning elements and movement of the transverse beams together with the elements for taking the processing device and the processing device vertically downwards,

- statement of the processing device on the transporting device, detaching the elements for taking the processing device and its withdrawal,

- supplying another treatment device to another transport device,

- attach the elements for taking the processing device to another processing device,

- actuation of the positioning elements and movement of the transverse beams together with elements for taking the processing device and another processing device vertically upwards,

- connection of another treatment device with metal stands and, if necessary, other parts of the installation and

- disconnecting the elements for taking processing device from another processing device.

The proposed method provides a quick and inexpensive possibility of replacing the processing device. While traditional installations have to be serviced with large staff costs and time consuming, the use of the proposed device in the installation provides significant advantages here.

The elements for taking the treatment device are optionally movable. They are then moved and positioned, preferably by means of other positioning elements.

In this case, in particular, it turned out that the best way to replace the processing device was that it was fastened on metal racks and / or crossbars, as well as other parts of the installation, and was activated and separated, in particular, automatically by remote control. This ensures particularly quick connection and disconnection of the treatment unit in case of maintenance.

In the drawings, as an example, the proposed device, installation and method. In the drawings are:

- figure 1: schematic device when viewed from the side;

- FIG. 2: installation with the device of FIG. 1 when viewed from the side;

- FIG. 3: The installation of FIG. 2 in longitudinal section;

- FIG. 4: The installation of FIG. 2 when viewed from the front;

- FIG. 5: The installation of FIG. 4 with raised bucket;

- FIG. 6: a fragment of FIG. 5 in the zone of transverse beams in perspective;

- FIG. 7: Installation of FIG. 4 in maintenance mode;

- FIG. 8: Installation of FIG. 7 in section VIII-VIII;

- FIG. 9: Installation of FIG. 7 with the processing device lowered.

In Fig.1, when viewed from the side, a device 1 is shown schematically for raising and lowering a bucket 9 for treating liquid metal 8 therein (see also Fig. 2 and 3 with respect to the bucket 9 and liquid metal 8, respectively). Device 1 includes four metal posts 2, of which only two are shown. They are interconnected by crossbars 2a. In addition, there are two transverse beams 5, which are connected to the crossbars 2a by means of the positioning elements 4 in the form of hydraulic cylinders. Two positioning elements 4 are provided for each transverse beam 5, which are designed to move the transverse beams 5 connected to them in the z direction or towards it. Each transverse beam 5 is connected with element 7 for taking the bucket 9, by means of which the bucket 9 is taken. For each bucket pickup element 7, a positioning body 4 ’is provided to orient the position of the corresponding bucket pickup element 7. On metal posts 2, guides 2b are mounted along which both ends of each transverse beam 5 are guided.

FIG. 2, when viewed from the side, installation 100 is shown with a device 1 similar to FIG. 1. Identical elements are denoted by the same reference numerals as in FIG. 1. Metal posts 2 of the device 1 are fixed on the base 20. In the area of the crossbars 2a there is a processing device 3 fixed with fastening means 15. In the upper part of the processing device 3 there are other parts 22 of the installation, creating a connection between the processing device 3 and the vacuum pump (not shown ) for evacuating the internal space 3a of the treatment device 3. The bucket 9 contains two gripping elements 11, for which the bucket 9 elements 7 are taken to lift it. The bucket 9 is located on the trolley 17 and with its help was transported under the processing device 3.

FIG. 3, installation 100 of FIG. 2 is shown in longitudinal section, and the bucket 9 is depicted in the raised state. The same elements are denoted by the same reference numerals as in FIG. 2. Here you can see the internal space 3a of the processing device 3 and the liquid metal 8 in the ladle 9. The processing device 3 has an inlet 13 and an outlet 13 'opening (see FIG. 4), which are immersed in the liquid metal 8. After starting the process of evacuating the internal space 3a, the liquid metal 8 is sucked into it through the inlet 13, it is degassed there and through the outlet 13 'flows back into the bucket 9.

FIG. 4, installation 100 of FIG. 2 is shown in front view. The same elements are denoted by the same reference numerals as in FIG. 2. Elements 21 are also visible here for taking processing device 3 in case of maintenance. These elements 21 are rigidly fixed here on both transverse beams 5, however, as an alternative, they can also be made movable and move and positioned by means of other positioning elements (not shown). The processing device 3 has protrusions 14 into which the elements 21 abut when lifting the transverse beams 5, causing unloading from the weight in the area of the fastening means 15, as a result of which they can be easily separated.

FIG. 5, installation 100 of FIG. 4 is shown with a raised bucket 9. Equal elements are denoted by the same reference numerals as in FIG. 4. When lifting the transverse beams 5 by means of the positioning elements 4, the bucket rises and moves in the direction of the treatment device 3 until it sinks into the liquid metal 8 (see Fig. 3). In this case, the transverse beams 5 move at their both ends in the guides 2b.

FIG. 6, a fragment of FIG. 5 in the zone of transverse beams 5 is depicted for greater clarity in perspective. The same elements are denoted by the same reference numerals as in FIG. five.

FIG. 7 The installation of FIG. 4 is depicted in maintenance mode. The same elements are denoted by the same reference numerals as in FIG. 4. The transverse beams 5 have moved upward by means of the positioning elements 4 so that the elements 21 have rested against the projections 14 of the processing device 3, and the fastening elements 15 have unloaded from its weight. Under the processing device 3, there is a trolley 17 with a receiving element 17 ′ for receiving the processing device 3. In this position, the fastening means 15 are separated. The fastener 15 is also separated between the other parts 22 of the installation and the processing device 3.

FIG. 8 The installation of FIG. 7 is shown in section VIII-VIII. The same elements are denoted by the same reference numerals as in FIG. 7. Two fasteners 15 are already separated from the processing device 3, and two are not yet separated.

FIG. 9 The installation of FIG. 7 is depicted with the processing device 3 lowered onto the receiving element 17 ’. The same elements are denoted by the same reference numerals as in FIG. 7. Trolley 17 together with receiving element 17 ’by processing unit 3 can now be rolled back. In order to bring the plant back to a ready-to-use state as quickly as possible, another, if necessary, new or repaired processing device is rolled onto another trolley with a receiving element. It is taken by the elements 21, lifted and fixed by fastening means 15. The empty trolley with the receiving element is rolled away. The unit is again ready to process liquid metal.

FIG. 1-9 depict only examples of how a processing device, elements for taking a processing device, elements for taking a bucket, guides, positioning elements, etc. can be performed. With this invention, the specialist opens a large number of possibilities of how to perform the proposed device or the proposed installation without the need for the manifestation of this inventive activity.

Claims (24)

1. Device (1) for raising and lowering a bucket (9) for treating liquid metal (8) in it by means of a treatment device (3) for treating liquid metal, and device (1) includes: - at least three vertically oriented metal struts (2), at least two horizontally oriented crossbars (2a), each crossbar (2a) interconnecting two metal posts (2) and fastened to them, - two transverse beams (5), with each transverse beam (5) in the vertical direction movably connected to one of the crossbars (2a), - at least one positioning element (4) for moving the corresponding transverse beam (5), with each positioning element (4) at one end connected to one of the crossbars (2a) and the other to one of the transverse beams (5) movement of transverse beams (5) independently of each other, - connected to the corresponding transverse beam (5) element (7) for taking the bucket, by means of which the bucket (9) is taken, and - at least one positioning means (4 ’) for orienting the position of the corresponding element (7) for taking the bucket. 2. The device according to claim 1, in which the metal struts (2) are made at one of their ends for fixing in the base (20). 3. The device according to claim 1 or 2, in which at least one of both ends of each transverse beam (5) is directed along the guide (2b). 4. The device according to claim 3, in which the guide (2b) has a longitudinal axis running parallel to the longitudinal axes of the metal struts (2). 5. The device according to claim 4, in which the guide / guides (2b) are made / made in one piece with the metal stand (2). 6. The device according to claim 4, in which the guide (2b) is mounted on a metal rack (2) at a distance from it. 7. The device according to claim 1 or 2, in which four metal posts (2) are provided. 8. The device according to claim 1 or 2, in which two positioning elements (4) are provided for each transverse beam (5). 9. The device according to claim 1 or 2, in which the transverse beams (5) comprise at least one element (21) for taking the treatment device (3), which is adapted for taking with the help of elements (21). 10. The device according to claim 9, wherein the elements (21) for taking the processing device are movable and at least one additional positioning element is provided for moving each element (21). 11. The device according to claim 1 or 2, wherein the positioning element (4) and / or the additional positioning element is designed as a hydraulic cylinder. 12. The device according to claim 1 or 2, in which the positioning element (4) is made in the form of at least one cable drive system. 13. Installation for processing liquid metal (8) in the ladle (9), containing the device (1) according to any one of claims 1 to 12 and the processing device (3) for processing liquid metal, and said processing device (3) is detachably fixed to metal racks (2) and / or on the crossbars (2a) of the device (1). 14. Installation according to item 13, which contains a transporting system for transporting the bucket (9) in the transporting device, in particular the trolley (17), to the processing device (3). 15. Installation under item 13 or 14, in which the said processing device is made with the possibility of degassing a liquid metal (8). 16. Installation according to clause 15, in which the said processing device is connected to at least one part of the installation, which includes at least one vacuum pump. 17. A method of treating a liquid metal (8) in a ladle (9) by means of a treatment device (3) for treating a liquid metal, the bucket (9) using a device (1) according to any one of claims 1-12 raising so much that the liquid metal ( 8) in the ladle (9) is treated by means of the above-mentioned processing device (3). 18. The method according to 17, in which the processing device (3) has an inlet (13) and outlet (13 ') holes for the metal being processed, and the bucket (9) is raised so that the inlet (13) and the outlet (13 ') immersed in liquid metal (8).

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