Oxygen lance guide assembly

Abstract

The present invention relates to an oxygen lance guide assembly having an oxygen lance supply device (20) arranged on a tap drilling unit, the tap drilling unit having in a receiving part (13) for placing the drilling mechanism (14) a drilling rod guide device (15) for a drilling rod driven by the drilling mechanism (14), the oxygen lance supply device (15) being arranged in an operating position in a space formed between the drilling rod guide device (15) and the drilling mechanism (14) such that the drilling rod guide device (15) forms an oxygen lance guide axis (24).

Description

Technical Field

[0001] The present invention relates to an oxygen lance guide assembly having an oxygen lance supply device disposed in a tapping unit, the tapping unit having a receiving portion for disposing a piercing mechanism and a piercing rod guide device for a piercing rod driven by the piercing mechanism.

Background Art

[0002] According to Patent Document 1, an oxygen lance supply device disposed in a tapping unit is known. In this oxygen lance supply device, an oxygen lance disposed on a roll and formed in a tubular shape is guided coaxially with a piercing rod inserted into a piercing mechanism by an oxygen lance supply device disposed in front of the piercing mechanism in the supply direction. For this reason, a central guide hole is provided in the piercing rod, and the oxygen lance can be inserted into the tap hole of the melting furnace through the piercing rod and exit from the piercing head of the piercing rod.

[0003] The roll necessary for disposing the oxygen lance is located in the receiving portion that supports the piercing mechanism, so that the oxygen lance unwound from the roll is inserted into the oxygen lance supply device through the guide hole of the piercing rod formed coaxially with the guide shaft.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] Known oxygen lance guide assemblies require a known combination of an oxygen lance supply device and a tapping hole machining unit to use a piercing rod provided with guide holes in a specific manner. Since the oxygen lance supply device is arranged upstream of the piercing mechanism in the supply direction, there is a disadvantage that a pipeline corresponding to the oxygen lance must also be provided in the piercing mechanism. Furthermore, the mass will increase due to the supply roll arranged at the receiving part of the tapping hole machining unit in addition to the oxygen lance supply device, and as a result, the handling of the tapping hole machining unit will become complicated.

[0006] Therefore, an object of the present invention is to provide an oxygen lance guide assembly having an oxygen lance supply device arranged in a tapping hole machining unit, which does not have the above-mentioned disadvantages.

Means for Solving the Problems

[0007] To achieve this object, the oxygen lance supply device of the oxygen lance guide assembly according to the present invention is arranged at an operating position within the space formed between the piercing rod guide device and the piercing mechanism such that the piercing rod guide device forms the oxygen lance guide axis.

[0008] By disposing the oxygen lance supply device within the space formed between the piercing rod guide device and the piercing mechanism, it becomes possible to provide the tap piercing unit with both a normal piercing rod and a normal piercing mechanism, eliminating the need to provide a pipeline for guiding the oxygen lance in either the piercing rod or the piercing mechanism. Instead, the already provided piercing rod guide device is used to guide the oxygen lance. In the non-operating position where the oxygen lance supply device is located outside the space formed between the piercing rod guide device and the piercing mechanism, the piercing rod connected to the piercing mechanism can be placed in the piercing rod guide device in order to operate the piercing rod using the piercing mechanism to open a tap hole. After the tap hole is successfully opened, the piercing rod can be removed from the piercing mechanism and the piercing rod guide device, and the oxygen lance supply device can be moved from the non-operating position to the operating position. In the operating position, the oxygen lance supply device is located within the space formed between the piercing rod guide device and the piercing mechanism. To penetrate the tap hole by operating the oxygen lance, the oxygen lance can be inserted into the oxygen lance supply device and inserted into the tap hole along the guide axis defined by the piercing rod guide device by the piercing rod guide device formed in the receiving portion. When inserting the oxygen lance into the tap hole channel of Melting furnace , the lateral displacement between the shape of the piercing rod and the shape of the oxygen lance is minimized as much as possible, thereby particularly increasing the lifespan of the tap hole channel.

[0009] Unlike the oxygen lance guide assembly known from Patent Document 1, the oxygen lance guide assembly according to the present invention can be provided with an oxygen lance supply device by modularly adding a normal tap piercing unit equipped with a normal piercing rod and a normal piercing mechanism. For the oxygen lance, no additional oxygen lance guide assembly is required in addition to the piercing rod guide device.

[0010] It is particularly advantageous if the oxygen lance supply device is arranged so as not to be removable from the receiving part, and in particular if the oxygen lance supply device is movable from a non-operating position outside the space formed between the piercing rod guide device and the piercing mechanism to an operating position.

[0011] It is particularly advantageous if the oxygen lance supply device is movable from a non-operating position above the receiving part to an operating position below the receiving part.

[0012] Regarding a particularly simple structure for arranging the oxygen lance supply device in the receiving part of the tapping piercing unit, it is particularly advantageous if the oxygen lance supply device is movable by a pivoting movement from a non-operating position above the receiving part to an operating position below the receiving part.

[0013] For this purpose, the oxygen lance supply device is preferably arranged on a pivoting arm connected to a connector via a pivoting joint for connection to the receiving part.

[0014] If, in addition to the first guide receiver, an additional guide receiver facing the piercing mechanism is provided on the piercing rod guide device and the distance of the guide receiver from the piercing mechanism can be changed, the space required to arrange the oxygen lance supply device in its operating position can be formed as simply as possible.

[0015] When the oxygen lance supply device has a supply bending piece and the oxygen lance guide axis formed by the piercing rod guide device forms a tangent to the guide bending part formed by the supply bending piece, it becomes possible to supply the oxygen lance particularly advantageously with a bending load as small as possible for the oxygen lance, and a collision of the oxygen lance against the piercing mechanism arranged in the same receiving part as the oxygen lance supply device is avoided. Therefore, when the oxygen lance is inserted into the oxygen lance supply device, bending stress in the material of the oxygen lance can be prevented. This bending stress can deform the oxygen lance due to a high-temperature load in the material of the oxygen lance during the operation of the oxygen lance in the tapping hole, causing an asymmetric temperature load in the tapping hole channel and damaging the tapping hole channel. Instead, the oxygen lance will simply be elastically bent by the supply bending piece, so that correction by applying a bending force corresponding to the oxygen lance is not as necessary as when the oxygen lance is wound up. Also, this enables the oxygen lance to be supplied with a relatively small supply force, whereby the supply can be controlled as accurately as possible.

[0016] It is particularly advantageous if the free insertion end of the guide bending piece forms a supply axis that is inclined at a supply angle with respect to the oxygen lance guide axis, so that the oxygen lance can be inserted laterally at that supply angle within the space between the oxygen lance supply device and the piercing mechanism. Such a lateral supply axis enables the supply of a linear oxygen lance component that can be connected to another linear oxygen lance component after being inserted into the insertion end of the supply bending piece, in order to enable the continuous supply of the oxygen lance by the oxygen lance supply device starting from the supply of an oxygen lance component of a defined length.

[0017] Unlike the insertion of an oxygen lance when a strongly curved oxygen lance stored on a roll is straightened and exposed to bending stress before being inserted into the tapping hole of a melting furnace, a linear oxygen lance component can be inserted into the tapping hole channel without internal stress occurring.

[0018] When the supply axis is inclined at an acute angle with respect to the guide axis, that is, when the oxygen lance component is supplied laterally from the supply zone arranged on the upstream side in the supply direction of the oxygen lance supply device, the bending load on the oxygen lance component in the supply bending piece can be minimized, which is particularly preferable.

[0019] When the oxygen lance supply device has at least one drive roller, and this at least one drive roller forms a roller pair with a counter roller arranged on the oxygen lance guide axis to form a roller gap, the oxygen lance supply device with an integrated drive unit can be configured particularly compactly.

[0020] Preferably, the roller gap is elastically expandable so that the thick part formed on the oxygen lance can pass through the roller gap during continuous operation, and it can prevent the continuous supply of the oxygen lance composed of a plurality of oxygen lance components and having different diameters at the connection points from being impaired.

[0021] When the oxygen lance supply device has two roller pairs separated by a guide piece extending on the oxygen lance guide axis, the vibration that may occur in the oxygen lance can preferably be attenuated by a linear guide piece after the oxygen lance exits the first roller pair and before entering the second roller pair.

Brief Description of the Drawings

[0022]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

DETAILED DESCRIPTION OF THE INVENTION

[0023] Hereinafter, preferred embodiments of the present invention will be described in more detail with reference to the drawings.

[0024] FIG. 1 is an overall perspective view of a tapping and piercing unit 10 having a receiving portion 13 disposed on a swing arm 12 and preferably formed as a piercing mast. The swing arm 12 is disposed on a swing base 11. The receiving portion 13 is movable in the longitudinal direction along the receiving portion 13 and includes a piercing mechanism 14 having a function of driving a piercing rod 16 that fits (is accommodated) into a piercing rod guide device 15 disposed on the receiving portion 13.

[0025] In order to be able to replace the piercing rod 16 if necessary, particularly when it is necessary to replace the piercing head 19 disposed at the head end of the piercing rod 16, the piercing rod 16 is replaceably accommodated in a piercing chuck (not shown) formed in the piercing mechanism 14 and is guided within two guide receivers 17, 18 of the piercing rod guide device 15, and the piercing rod 16 can be removed from the piercing mechanism 14 in the direction of the piercing rod guide shaft 25.

[0026] As further shown in FIG. 1, an oxygen lance supply device 20 disposed on the piercing mast 13 in the same manner as the piercing mechanism 14 and connected to the receiving portion 13 via a connector 21 is disposed in the tapping and piercing unit 10 in addition to the piercing mechanism 14. The piercing mast 13 forms a receiving portion for disposing the piercing mechanism 14. In FIG. 1, the oxygen lance supply device 20 enables the tapping and piercing unit 10 to be used in the conventional manner, that is, by using the tapping and piercing unit 10, a piercing rod 16 driven by the piercing mechanism 14 and adapted to the piercing rod guide device 15 is used Melting furnaceIt is located at its non-operating position so that a tap hole can be drilled, and the piercing head 19 can mechanically break the sealed portion of the tap hole in order to penetrate the tap hole as a prerequisite for inserting an oxygen lance thereafter.

[0027] Figure 2 shows the oxygen lance supply device 20 in its operating position. In this case, the oxygen lance supply device 20 can be moved by a pivoting operation from a non-operating position above the receiving portion 13 formed by the piercing mask to an operating position below the receiving portion. For this purpose, the oxygen lance supply device 20 is arranged on a pivoting arm 23 connected to a connector 21 via a pivoting joint 22.

[0028] As can be seen from Figure 2, the oxygen lance supply device 20 is arranged in the space formed between the piercing rod guide device 15 and the piercing mechanism 14 on an oxygen lance guide axis 24 corresponding to the piercing rod guide axis 25 defined by the piercing rod guide device 15 as described above in its operating position. The oxygen lance supply device 20 is configured such that a tubular oxygen lance 39 is supplied laterally to the oxygen lance guide axis 24 defined by the piercing rod guide device 15. For this purpose, the oxygen lance supply device 20 has a supply bending piece 27 arranged in a guide housing 26, and this supply bending piece 27 is arranged in the guide housing 26 having a longitudinal guide assembly 28 such that the oxygen lance guide axis 24 forms a tangent to the guide bending portion formed by the supply bending piece 27.

[0029] In this case, the longitudinal guide assembly 28 within the guide housing 26 forms a horizontal guide surface together with a guide bending portion formed by the guide bending piece 27. On this horizontal guide surface, the oxygen lance 39 inserted into the supply bending piece 27 is introduced and continuously reaches the oxygen lance guide axis 24 that coincides with the perforating rod guide axis 25 at a guide angle α with respect to the oxygen lance guide axis 24. After the oxygen lance 39 exits the outlet opening 29 of the guide housing 26, the oxygen lance 39 is further guided longitudinally by the guide receivers 17, 18 of the perforating rod guide device 15 arranged on the oxygen lance guide axis 24.

[0030] As can be seen from the combination of FIGS. 3 and 4, the longitudinal guide assembly 28 within the guide housing 26 is formed in this embodiment by two roller pairs 30, 31. These roller pairs each have a drive roller 32 and a counter roller 33. Roller gaps 34, 35 are respectively formed between these roller pairs, and the roller gaps 34, 35 are located on the oxygen lance guide axis 24. Between the roller gaps 34, 35, a linear guide piece 36 formed by a tubular piece in this embodiment is arranged.

[0031] To drive the drive roller 32, one of the drive rollers 32 is flange-mounted laterally with respect to the guide housing 26 and is preferably driven by a drive motor 37 which is a hydraulic motor. This driving force is simultaneously transmitted to the second drive roller 32 via a drive chain 38 that connects the drive rollers 32 to each other, and the oxygen lance 39 guided through the roller gaps 34, 35 is propelled by both roller pairs 30, 31.

[0032] As particularly shown in FIG. 4, the oxygen lance 39 is composed of a plurality of oxygen lance components 40, 41 that are connected to each other by a connecting means 42 that can be formed, for example, by a clamp sleeve. A thick portion is formed in the oxygen lance 39 by these connecting means 42. In order to continuously pull the oxygen lance 39 basically continuously through the roller gaps 34, 35, it is necessary to adjust the roller gaps 34, 35 so as to conform to the diameter change caused by the connecting piece 42 at the transition portion between the oxygen lance components 40, 41. For this reason, as can be seen particularly from the combination of FIGS. 3 and 5, the counter rollers 33 are connected to each other via an elastic and flexible pretensioning unit 43 such that the roller shafts 44 of the counter rollers 33 are attached to the extensions 45, 46 of the pretensioning unit 43. In this example, the cantilever shafts 47, 48 having the swing arms 49 connected to each other via a spring device 51 configured as a tension spring are provided with the cantilever arms 45, 46. Adjusting means are arranged on one of the swing arms 49, 50 to adjust an appropriate spring force.

[0033] As can be seen particularly from the combination of FIGS. 2 and 4, by connecting an additional oxygen lance component 41 to the oxygen lance component 40 protruding from the insertion end 54 of the supply bending piece 27 via the connecting piece 42, the oxygen lance 39 can be continuously supplied in the supply direction 53 to a tapping hole (not shown). In the process of the oxygen lance 39 advancing within the oxygen lance supply device 20, the oxygen lance 39, or more precisely, the oxygen lance components 40, 41 forming the oxygen lance 39, are continuously and stably aligned with the oxygen lance guide axis 24 that coincides with the piercing rod guide axis 25 by the supply bending piece 27.

[0034] Therefore, it is not even necessary to arrange a loading device in addition to the oxygen lance supply device 20 in the receiving portion 13 or the tapping and piercing unit 10, and the oxygen lance 39 consumed during the operation can be continuously replenished from the loading position that is laterally arranged with respect to the piercing mask 13 at the operator's loading position, or from an automatic loading device by the oxygen lance supply device 20.

Claims

1. An oxygen lance guide assembly provided in a melting furnace, having an oxygen lance supply device (20) arranged in a tap drilling unit (10), wherein the tap drilling unit (10) has a receiving part (13) for arranging a drilling mechanism (14) and a drilling rod guide device (15) for a drilling rod (16) driven by the drilling mechanism (14), the oxygen lance supply device (15) is arranged at an operating position within a space formed between the drilling rod guide device (15) and the drilling mechanism (14) such that the drilling rod guide device (15) forms an oxygen lance guide axis (24), and the oxygen lance guide assembly is characterized in that the oxygen lance supply device (20) is movable from a non-operating position outside the space formed between the drilling rod guide device (15) and the drilling mechanism (14) to the operating position.

2. The oxygen lance guide assembly according to Claim 1, wherein the oxygen lance supply device (20) is arranged in the receiving part (13).

3. The oxygen lance guide assembly according to Claim 1 or 2, wherein the oxygen lance supply device (20) is movable from a non-operating position above the receiving part (13) to an operating position below the receiving part (13).

4. The oxygen lance guide assembly according to Claim 3, wherein the oxygen lance supply device (20) is movable to the operating position by a swiveling operation.

5. The oxygen lance guide assembly according to Claim 4, wherein the oxygen lance supply device (20) is arranged on a swivel arm (23) connected to a connector (21) via a swivel joint (22) for connecting to the receiving part (13).

6. The oxygen lance guide assembly according to any one of Claims 1 to 5, wherein the drilling rod guide device (15) has, in addition to a first guide receiver (17), an additional guide receiver (18) facing the drilling mechanism (14), and the distance of the guide receiver (18) with respect to the drilling mechanism (14) is adjustable.

7. In the oxygen lance guide assembly according to any one of claims 1 to 6, the oxygen lance supply device (20) has a supply bending piece (27), and the oxygen lance guide shaft (24) forms a tangent line of a guide bending portion formed by the supply bending piece (27). An oxygen lance guide assembly characterized by that.

8. In the oxygen lance guide assembly according to claim 7, a supply shaft inclined at a supply angle α with respect to the oxygen lance guide shaft (4) is formed at a free insertion end (54) of the supply bending piece (27), and the oxygen lance can be inserted laterally at the supply angle α into a space formed between the oxygen lance supply device (20) and the drilling mechanism (14). An oxygen lance guide assembly characterized by that.

9. In the oxygen lance guide assembly according to any one of claims 1 to 8, the oxygen lance supply device (20) has at least one drive roller (32), and the at least one drive roller (32) forms a roller pair (30, 31) with a counter roller (33) for forming roller gaps (34, 35) on the oxygen lance guide shaft (24). An oxygen lance guide assembly characterized by that.

10. In the oxygen lance guide assembly according to claim 9, the roller gaps (34, 35) are elastically expandable so that a thick portion formed on the oxygen lance (39) passes through the roller gaps (34, 35) during continuous operation. An oxygen lance guide assembly characterized by that.

11. In the oxygen lance guide assembly according to claim 10, the oxygen lance supply device (20) has two roller pairs (30, 31) separated by a guide piece (36) extending on the oxygen lance guide shaft (24). An oxygen lance guide assembly characterized by that.

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