Oxygen lance guiding assembly

Abstract

The invention relates to an oxygen lance guiding assembly having an oxygen lance feeding device (20) which is disposed on a tap hole drilling 15 unit, the tap hole drilling unit having a drilling rod guiding device (15) for a drilling rod, which is driven by a drilling mechanism (14), on a receptacle (13) for disposing the drilling mechanism (14) thereon, the oxygen lance feeding device (15) being disposed in an operating position in a space formed between the drilling rod guiding device (15) and the 20 drilling mechanism (14) in such a manner that the drilling rod guiding device (15) serves to form an oxygen lance guiding axis (24).

Description

[0001] Oxygen lance guide arrangement The present invention relates to an oxygen lance guide arrangement with an oxygen lance feed device arranged on a taphole drilling unit, wherein the taphole drilling unit has a drill rod guide device for a drill rod drivable by the drill rod on a receptacle for arranging a drilling machine. KR 20030035696 A discloses an oxygen lance feed device arranged on a taphole drilling unit, in which an oxygen lance stored on a roll and designed as a pipeline is guided coaxially with a drill rod inserted into the drilling machine by means of the oxygen lance feed device arranged upstream of a drilling machine in the feed direction. For this purpose, the drill rod is provided with a central guide bore such that the oxygen lance can be inserted through the drill rod and from a drill head of the drill rod into the taphole of a melting furnace.The roll required for storing the oxygen lance is located, as is the oxygen lance feed device, on the holder carrying the drilling machine, in such a way that the oxygen lance unwound from the roll is introduced into the oxygen lance feed device by means of a guide bore of the drilling rod which forms the guide axis coaxially to it.

[0002] A disadvantage of the known oxygen lance guide arrangement is that the known combination of the oxygen lance feed device with the taphole drilling unit requires the use of a drill rod specially provided with a guide bore. Due to the oxygen lance feed device being arranged upstream of the drilling unit in the feed direction, the drilling unit must also be provided with a corresponding passage for the oxygen lance. Furthermore, the supply roll arranged in addition to the oxygen lance feed device on the taphole drilling unit holder results in an increase in the weight of the taphole drilling unit, which complicates handling.

[0003] The invention is therefore based on the object of proposing an oxygen lance guide arrangement with an oxygen lance supply device arranged on a taphole drilling unit, which does not have the aforementioned disadvantages.

[0004] To achieve this object, in the oxygen lance guide arrangement according to the invention, the oxygen lance guide device is arranged in an operating position in a space formed between the drill rod guide device and the boring machine, such that the drill rod guide device serves to form an oxygen lance guide axis.

[0005] By arranging the oxygen lance supply device in a space formed between the drill rod guide device and the boring machine, it is possible to equip the taphole drilling unit with both a conventionally designed drill rod and a conventionally designed boring machine, whereby neither the drill rod nor the boring machine need to be provided with a passage for the oxygen lance. Rather, the drill rod guide device already provided is used to guide the oxygen lance. In an inoperative position, in which the oxygen lance supply device is located outside the space formed between the drill rod guide device and the boring machine, the drill rod coupled to the boring machine can be arranged in the drill rod guide device in order to open the taphole by driving the drill rod with the boring machine.Once the taphole has been opened, the drill rod can be removed from the boring machine and the drill rod guide device, allowing the oxygen lance supply device to be moved from the inoperative position to the operational position. In the operational position, the oxygen lance supply device is located in the space formed between the drill rod guide device and the boring machine, allowing the oxygen lance to be inserted into the oxygen lance supply device and, by means of the drill rod guide device formed on the holder, guided into the taphole along a guide axis defined by the drill rod guide device, in order to fully open the taphole by operating the oxygen lance.When the oxygen lance is inserted into the taphole channel of the melting furnace, the smallest possible lateral deviations between the path of the drill rod and the path of the oxygen lance are achieved, which in particular increases the service life of the taphole channel.

[0006] In contrast to the oxygen lance guide arrangement known from KR 102003035696 A, the oxygen lance guide arrangement according to the invention can therefore be provided by modularly supplementing a conventionally designed taphole drilling unit, which is provided with a conventionally designed drill rod and a conventionally designed drilling unit, with an oxygen lance feed device, without a separate oxygen lance guide device being required for the oxygen lance in addition to the drill rod guide device.

[0007] It is particularly advantageous if the oxygen lance supply device is permanently arranged on the holder, in particular in such a way that the oxygen lance supply device can be transferred from an inoperative position outside the space formed between the drill rod guide device and the drilling machine into the operating position.

[0008] It is particularly advantageous if the oxygen lance supply device can be transferred from the inoperative position arranged above the holder into the operating position arranged below the holder.

[0009] With regard to a particularly simple structural design of the arrangement of the oxygen lance supply device on the holder of the taphole drilling unit, it proves to be particularly advantageous if the oxygen lance supply device can be transferred by a pivoting movement from the inoperative position arranged above the holder into the operating position arranged below the holder.

[0010] For this purpose, the oxygen lance supply device is preferably arranged on a pivot arm connected via a pivot joint to a connecting device for mechanical connection to the receptacle.

[0011] If the drill rod guide device has, in addition to a first guide receptacle, a further guide receptacle facing the boring machine, the distance of which from the boring machine is variable, the space required for arranging the oxygen lance feed device in its operating position can be created in the simplest possible manner. A particularly advantageous feed of the oxygen lance with the lowest possible bending load on the oxygen lance, while avoiding a collision of the oxygen lance with the boring machine, which is arranged on the same receptacle as the oxygen lance feed device, is possible if the oxygen lance feed device has a feed arc piece such that the oxygen lance guide axis defined by the drill rod guide device forms a tangent to a guide arc formed by the feed bore piece.This prevents bending stresses from being generated in the oxygen lance material when the oxygen lance is inserted into the oxygen lance feed device. This stress, due to the high temperature load on the oxygen lance material during operation of the oxygen lance in the taphole, can lead to deformation of the oxygen lance. This can lead to asymmetrical temperature loading in the taphole channel and thus to damage to the taphole channel. Instead, the feed bend piece allows only elastic bending of the oxygen lance, so that straightening with the application of corresponding bending forces to the oxygen lance, to the extent that is the case with a rolled-up oxygen lance, is not necessary. This also enables relatively low feed forces for the feed of the oxygen lance, which allow the most precise control of the feed.

[0012] It proves particularly advantageous if the guide arc piece forms, at its free insertion end, a feed axis inclined at a feed angle to the oxygen lance feed axis, such that an oxygen lance can be inserted laterally at the feed angle into a space formed between the oxygen lance feed device and the drilling machine. Such a lateral feed axis enables the feeding of rectilinear oxygen lance sections, which, after insertion into the insertion end of the feed arc piece, can each be connected to another rectilinear oxygen lance section in order to enable a continuous feed of the oxygen lance through the oxygen lance feed device, starting from the provision of oxygen lance sections of a defined length.

[0013] In contrast to a feed from a strongly bent wire stored on a roll and thus before insertion into the tap hole of the

[0014] The straight oxygen lance sections of the melting furnace are subjected to bending stresses for straightening purposes and can be inserted into the taphole channel free of internal stresses.

[0015] It is particularly preferred if the feed axis is inclined at an acute angle to the guide axis, i.e., when the oxygen lance sections are fed laterally from a feed area that is arranged upstream of the oxygen lance feed device in the feed direction, bending stress on the oxygen lance sections in the feed curve can be minimized. If the oxygen lance feed device has at least one drive roller, which, with a counter roller, forms a roller pair to form a roller gap arranged on the oxygen lance feed axis, a particularly compact design of an oxygen lance feed device provided with an integrated drive is possible.Preferably, the roller gap is designed to be elastically expandable, such that a thickening point formed on an oxygen lance can pass through the roller gap during continuous drive in order to be able to exclude any impairment of a continuous supply of the oxygen lance composed of oxygen lance sections and therefore having diameter changes formed as a result of the connecting points.

[0016] If the oxygen lance feed device has two pairs of rollers spaced apart by a guide piece running on the oxygen lance feed axis, the preferably straight guide piece can dampen any vibrations of the oxygen lance after the oxygen lance runs out of the first pair of rollers before it runs into the second pair of rollers.

[0017] A preferred embodiment of the invention is explained in more detail below with reference to the drawing.

[0018] They show:

[0019] Fig. 1 shows an overall view of a tap hole drilling unit supplemented with an oxygen lance supply device;

[0020] Fig. 2 shows an enlarged partial view of a drilling carriage arranged on a swivel arm of the taphole drilling unit with an oxygen lance supply device arranged in the operating position;

[0021] Fig. 3 shows the oxygen lance supply device shown in Fig. 2 in a longitudinal section along section line III-III in Fig. 2;

[0022] Fig. 4 shows the oxygen lance supply device shown in Fig. 2 in a further longitudinal section along section line IV-IV in Fig. 2;

[0023] Fig. 5 shows the oxygen lance supply device shown in Fig. 4 in a further longitudinal section according to section line VV.

[0024] Fig. 1 shows an isometric overall view of a taphole drilling unit 10 which has a holder 13 arranged on a pivot arm 12 arranged on a pivot base 11, preferably designed as a drilling carriage, which is provided with a drilling mechanism 14 which can be moved along the holder 13 and which serves to drive a drilling rod 16 held in a drilling rod guide device 15 arranged on the holder 13. The boring bar 16 is interchangeably received in a boring bar chuck (not shown in detail here) formed on the boring machine 14 and is guided in two guide receptacles 17, 18 of the boring bar guide device 15 in such a way that the boring bar 16 can be removed from the boring machine 14 in the direction of a boring bar guide axis 25 in order to be able to replace the boring bar 16 if necessary, in particular in the event that a drilling head 19 arranged at the head end of the boring bar 16 has to be replaced.

[0025] As Fig. 1 further shows, in addition to the boring machine 14, the taphole drilling unit 10 is provided with an oxygen lance supply device 20 which, like the boring machine 14, is arranged on the drilling carriage 13 forming the receptacle for arranging the boring machine 14 and is connected to the receptacle 13 via a connecting device 21. In the illustration according to Fig. 1, the oxygen lance supply device 20 is arranged in its inoperative position so that the taphole drilling unit 10 can be used conventionally, i.e. the taphole drilling unit 10 can be used with the drill rod 16 driven by the boring machine 14 and received in the drill rod guide device 15 to open a taphole of a melting furnace, wherein the drill head 19 causes a mechanical destruction of a sealing compound of the

[0026] Tap hole as a prerequisite for the subsequent introduction of an oxygen lance to completely open the tap hole.

[0027] Fig. 2 shows the oxygen lance feed device 20 in its operating position, into which the oxygen lance feed device 20 can be transferred by means of a pivoting movement from the inoperative position arranged above the receptacle 13 formed here by the drilling carriage into the operating position arranged below the receptacle. For this purpose, the oxygen lance feed device 20 is arranged on a pivot arm 23 connected to the connecting device 21 via a pivot joint 22. As is clear from the illustration in Fig. 2, the oxygen lance feed device 20 in its operating position is located in a space formed between the drill rod guide device 15 and the boring machine 14 on an oxygen lance guide axis 24 which coincides with the drill rod guide axis 25 defined by the drill rod guide device 15, as described above.The oxygen lance supply device 20 is designed such that a tubular oxygen lance 39 is fed laterally onto the oxygen lance guide axis 24 defined by the drill rod guide device 15. For this purpose, the oxygen lance supply device 20, as shown in particular in Fig. 4, has a feed arc piece 27 arranged on a guide housing 26, which is arranged on the guide housing 26, which is formed with a longitudinal guide arrangement 28, in such a way that the oxygen lance guide axis 24 forms a tangent to a guide arc formed by the feed arc piece 27.

[0028] In the present case, the longitudinal guide arrangement 28 in the guide housing 26 in combination with the guide arc formed by the guide arc piece 27 defines a horizontal guide plane into which an oxygen lance 39 introduced into the feed arc piece 27 is introduced and continuously reaches the oxygen lance guide axis 24 which coincides with the drill rod guide axis 25 at a guide angle α relative to the oxygen lance guide axis 24, wherein after the oxygen lance 39 emerges from an outlet opening 29 of the guide housing 26, the further longitudinal guidance of the oxygen lance 39 is effected by the guide receptacles 17, 18 of the drill rod guide device 15 arranged on the oxygen lance guide axis 24.

[0029] As can be further seen from a comparison of Figs. 3 and 4, the longitudinal guide arrangement 28 in the guide housing 26 is formed in the present case by two pairs of rollers 30, 31, each having a drive roller 32 and a counter roller 33, between which a roller gap 34 and 35 is formed, respectively. The roller gaps 34, 35 are arranged on the oxygen lance guide axis 24. Between the roller gaps 34, 35 is a straight guide piece 36, in the present case formed by a piece of pipe.

[0030] To drive the drive rollers 32, one of the drive rollers 32 is driven by a drive motor 37, which is flanged laterally to the guide housing 26 and is preferably designed as a hydraulic motor, this drive being transmitted simultaneously to the second drive roller 32 via a drive chain 38 connecting the drive rollers 32 to one another, so that the oxygen lance 39 guided through the roller gaps 34, 35 is driven forward via both pairs of rollers 30, 31.

[0031] As can be seen in particular from the illustration in Fig. 4, the oxygen lance 39 is composed of several oxygen lance sections 40, 41, which are connected to one another via connecting devices 42, which can be designed, for example, as clamping sleeves. These connecting devices 42 form thickened points on the oxygen lance 39, so that in order to maintain essentially continuous traction of the oxygen lance 39 through the roller gaps 34, 35, an adjustment of the roller gaps 34, 35 to the diameter changes caused by the connecting pieces 42 in the transition between the oxygen lance sections 40, 41 is necessary. For this purpose, as can be seen in particular from a summary of Fig.3 and 5, the counter rollers 33 are connected to one another via an elastically flexible pretensioning device 43, such that roller axes 44 of the counter rollers 33 are mounted in arms 45, 46 of the pretensioning device 43, wherein the arms 45, 46 are arranged on arm shafts 47, 48 with lever arms 49, 50, which are connected to one another via a spring device 51, designed here as a tension spring. To set the appropriate spring force, an adjusting device 52 is arranged on one of the lever arms 49, 50. As can be seen in particular from a combination of Figs. 2 and 4, a continuous supply of the oxygen lance 39 in the supply direction 53 to a tap hole (not shown here) can be achieved by connecting the further oxygen lance section 41 to the oxygen lance section 40 protruding from an inlet end 54 of the feed bend section 27 via a connecting piece 42.During the advance of the oxygen lance 39 within the oxygen lance feed device 20, the oxygen lance 39 or the oxygen lance sections 40, 41 forming the oxygen lance 39 are continuously aligned via the feed bend 27 with the oxygen lance guide axis 24, which coincides with the drill rod guide axis 25. Thus, the oxygen lance feed device 20 enables the continuous replenishment of the oxygen lance 39, which is consumed during operation, from a loading position of an operator or an automated loading device arranged to the side of the drill mast 13, without a loading device having to be arranged on the holder 13 or the taphole drilling unit 10 in addition to the oxygen lance feed device 20.

Claims

May 6, 2021 TMT Tapping Measunng Technology Sari SI / TMT-030-WO Luxembourg Scu / Tap / juu Patent claims 1. Oxygen lance guide arrangement with an oxygen lance supply device (20) arranged on a taphole drilling unit (10), wherein the taphole drilling unit (10) has a drill rod guide device (15) for a drill rod (16) that can be driven by the drill (14) on a receptacle (13) for arranging a drilling machine (14), characterized in that the oxygen lance supply device (15) is arranged in an operating position in a space formed between the drill rod guide device (15) and the drilling machine (14), such that the drill rod guide device (15) serves to form an oxygen lance guide axis (24).

2. Oxygen lance guide arrangement according to claim 1, characterized in that the oxygen lance supply device (20) is arranged on the receptacle (13).

3. Oxygen lance guide arrangement according to claim 1 or 2, characterized in that the oxygen lance supply device (20) can be moved from an out-of-operation position outside the space formed between the drill rod guide device (15) and the drill (14) into the operating position.

4. Oxygen lance guide arrangement according to a preceding claim, characterized in that the oxygen lance supply device (20) is located above the The out-of-service position arranged in the intake (13) can be transferred to the operating position arranged below the intake (13).

5. Oxygen lance guide arrangement according to claim 4, characterized in that the oxygen lance supply device (20) can be moved into the operating position by a pivoting movement.

6. Oxygen lance guide arrangement according to claim 5, characterized in that the oxygen lance supply device (20) is arranged on a swivel arm (23) which is connected via a pivot joint (22) to a connecting device (21) for mechanical connection with the receptacle (13).

7. Oxygen lance guide arrangement according to one of the preceding claims, characterized in that the drill rod guide device (15) has, in addition to a first guide receptacle (17), a further guide receptacle facing the drilling machine (14). has a guide receptacle (18) whose distance to the boring mill (14) is variable.

8. Oxygen lance guide arrangement according to any one of the preceding claims, characterized in that the oxygen lance feed device (20) has a feed arc (27) such that the oxygen lance guide axis (24) forms a tangent to a guide arc formed by the feed arc (27).

9. Oxygen lance guide arrangement according to claim 8, characterized in that the feed arc (27) forms a feed axis at its free insertion end (54) inclined at a feed angle α to the oxygen lance guide axis (4) such that an oxygen lance can be inserted laterally at the feed angle α into a space formed between the oxygen lance feed device (20) and the boring mill (14).

10. Oxygen lance guide arrangement according to one of the preceding claims, characterized in that the oxygen lance feed device (20) has at least one drive roller (32) which, together with a counter roller (33), forms a roller pair (30, 31) for forming a roller gap (34, 35) arranged on the oxygen lance guide axis (24).

11. Oxygen lance guide arrangement according to claim 10, characterized in that the roller gap (34, 35) is elastically expandable such that a- a thickening point formed on an oxygen lance (39) can pass through the roller gap (34, 35) during continuous drive.

12. Oxygen lance guide arrangement according to claim 11, characterized in that the oxygen lance supply device (20) has two pairs of rollers (30, 31) spaced apart by a guide piece (36) extending on the oxygen lance guide axis (24).