Classifications

• • C—CHEMISTRY; METALLURGY
  • C21—METALLURGY OF IRON
  • C21B—MANUFACTURE OF IRON OR STEEL
  • C21B7/00—Blast furnaces
  • C21B7/12—Opening or sealing the tap holes

Definitions

• the invention relates to a swivel device with boom, for swiveling a working member between a first and a second position, and with a control rod for aligning the working member as a function of the angular position of the boom.
• a swivel device with boom, for swiveling a working member between a first and a second position, and with a control rod for aligning the working member as a function of the angular position of the boom.
• Such a device is used, for example, in a tap hole drilling machine or tap hole tamping machine on the blast furnace.
• a classic tap hole drilling machine has a support structure in which a boom with a first end is pivotally mounted about a first axis.
• a swivel drive generates a swiveling movement of the boom about this first axis, for example from a rest position into a first working position in front of a first tap hole, or into a second working position in front of a second tap hole, and in each case back into the rest position.
• a drill carriage is pivotally connected to the second end of the boom about a second axis.
• a control rod is connected via a first joint to a fixed point on the supporting structure and via a second joint to the pivotable drill carriage, so that a pivoting movement of the boom about the first axis produces a pivoting movement of the drill carriage about the second axis.
• a disadvantage of these pivoting devices is that the control rod crosses the boom when pivoting the drill carriage. From this it follows that this control rod must be arranged either above or below the boom, which of course increases the space required (ie the required free height) for pivoting the boom. This can lead to space problems in particular if a tap hole drilling machine and a tap hole tamping machine are arranged on the same side of the tapping channel and the boom of the tap hole drilling machine has to pass under or over the tap hole tamping cannon when pivoting.
• Such a constellation is described, for example, in US Pat. No. 4,195,825.
• the present invention has for its object to provide a pivoting device with boom and control rod, which requires a lower free height for pivoting the boom.
• a first end of the boom is pivotally mounted in the support structure, so that the boom is pivotable about a first axis relative to the support structure.
• the working member is pivotally attached to the second end of the boom so that it is pivotable relative to the boom about a second axis.
• the control rod is articulated with a first end on the pivotable working member. It is an important feature of the present invention that the second end of the control rod is not articulated at a fixed point on the support structure, but rather at a four-link transmission.
• This four-link gear comprises the support structure as a frame and the boom as a driven link.
• a first link is hinged to the support structure and a second link is hinged to the boom.
• These two connecting links are connected to one another in an articulated manner, so that the four-link transmission is closed.
• the control rod is articulated with its second end to the first or second connecting element of the transmission.
• the articulation point of the second end of the control rod is always on the same side of the boom, so that the control rod does not cross the boom when pivoting.
• Figure 2 is a plan view of the tap hole drilling machine of Figure 1, in the working position in front of the blast furnace;
• Figure 3 is a view of the boom of a tap hole drilling machine according to the invention, which is driven under by a tap hole tapping machine (the drill carriage and the boom of the tap hole tamping machine are not shown in the figure);
• Figure 4 a detailed view of a transmission according to Figure 1;
• Figure 5 is a side view of the transmission shown in Figure 4.
• FIG. 1 shows, in a plan view of the casting platform 8 of a blast furnace 12, a tap hole drilling machine 10 in the rest position, to the side of a tapping channel 13 of the blast furnace 12.
• This tap hole drilling machine 10 essentially consists of a swivel device 14 according to the invention and a drilling mount 16 known per se The latter is not further described here.
• the pivoting device 14 comprises a support structure 18 for a boom 20.
• This support structure can, as shown in FIG. 3, be suspended, for example, under a platform 21 which surrounds the blast furnace 12. However, it could also be set up on the casting platform 8.
• One end of the boom 20 is pivotally mounted in this support structure 18.
• the position of the pivot axis of the boom 20 in the support structure 18 is shown by the reference numeral 22.
• the drill carriage 16 is pivotally suspended.
• the position of the pivot axis of the drill carriage 16 in the boom 20 is shown by the reference numeral 24.
• a hydraulic motor such as a double-acting hydraulic cylinder 28, is preferably used as the pivot drive of the boom.
• This hydraulic cylinder 28 thus enables the boom 20 to be pivoted about its pivot axis 22, between the rest position shown in FIG. 1, away from the tapping channel 13, and the working position shown in FIG. 2, in an axial extension of the tap hole, directly above the tapping channel 13.
• a control rod 30 is connected to the drilling mount 16 via a first swivel joint 32.
• the other end of this control rod is articulated on the support structure. This means that the control rod in the known tap hole drilling machine crosses the drilling carriage when pivoting between the rest position and the working position, or in other words that the boom must pass over or under the control rod when pivoting.
• the second end of the control rod 30 is articulated not on the support structure 18 but on a gear 34. This gear ensures that the control rod 30 is always on the same side of the boom 20 when the boom 20 is pivoted.
• the gear 34 is described in more detail with reference to FIGS. 4 and 5. It is a four-part transmission, the support structure 18 forming the frame and the boom 20 the driven member of the transmission.
• a first connecting member 36 is connected to the support structure 18 via a swivel joint 38.
• a second connecting member 40 is connected to the boom 20 via a swivel joint 42.
• These two connecting links 36 and 40 are connected to one another via a swivel joint 40, so that they close the four-link transmission 34.
• the second end of the control rod 30 is connected to the second connecting member 40 of the transmission 34 by means of a swivel joint 46.
• the pivot point of the second end of the control rod (ie the pivot joint 46) is always on the same side of the boom 20 as the pivot joint 32. It follows from this that the control rod 30 does not cross the boom 20 when pivoting.
• the exact alignment of the drill carriage 16 in the working position is advantageously determined by adjusting the length of the control rod 30.
• This length adjustment of the control rod 30 can take place, for example, by means of a threaded rod 48 that can be screwed in and out.
• the boom 20 moves under the first connecting link 36.
• the connecting link 36 is arranged in this section 50 in a free space between the underside of the stage 21 and the upper side of the boom 20.
• the border of which is indicated in FIG. 3 by the broken line 52, there is no longer any need to be provided above the arm 20.
• the boom 20 can consequently be stepped in height, as shown in FIG. 3, its front end 54 being higher than its rear end 50.
• the control rod 30 is located laterally in the pivoting range of the front end 54 (i.e. in a space which, when the boom 20 is pivoted, lies between the lower edge 56 and the upper edge 58 of the front end 54 of the boom 20). Consequently, it does not take up any additional space when pivoting.
• reference numeral 60 shows the tap hole cannon which can be pivoted below the boom 20. It is clearly evident that without an arrangement of the control rod 30 according to the invention, the free height between the platform and the casting platform would not be sufficient to drive under the boom 20 with the tap hole cannon 60.
• connecting members 36 and 40 shown in the figures is only one of many possibilities.
• these links 36, 40 could be below the boom 20 may be arranged.
• the arm 20 in the area 50 with a recess through which the connecting member 36 is passed.
• Such a recess is indicated schematically by a broken line 62 in FIG. In these two cases, the boom 20 naturally did not need to be graduated in height.

Landscapes

• Chemical & Material Sciences (AREA)
• Engineering & Computer Science (AREA)
• Manufacturing & Machinery (AREA)
• Materials Engineering (AREA)
• Metallurgy (AREA)
• Organic Chemistry (AREA)
• Earth Drilling (AREA)
• Jib Cranes (AREA)
• Blast Furnaces (AREA)
• Massaging Devices (AREA)
• Forklifts And Lifting Vehicles (AREA)
• Mechanical Control Devices (AREA)
• Agricultural Machines (AREA)
• Pivots And Pivotal Connections (AREA)
• Vehicle Body Suspensions (AREA)

Applications Claiming Priority (3)

Publications (2)

Family

ID=19731698

Family Applications (1)

Country Status (8)

Families Citing this family (1)

Family Cites Families (10)

• 1997
  • 1997-07-09 LU LU90089A patent/LU90089B1/xx active
• 1998
  • 1998-07-01 AU AU88051/98A patent/AU8805198A/en not_active Abandoned
  • 1998-07-01 BR BR9810573-6A patent/BR9810573A/pt active Search and Examination
  • 1998-07-01 AT AT98939597T patent/ATE210737T1/de active
  • 1998-07-01 DE DE59802455T patent/DE59802455D1/de not_active Expired - Lifetime
  • 1998-07-01 WO PCT/EP1998/004064 patent/WO1999002738A1/fr active IP Right Grant
  • 1998-07-01 US US09/462,689 patent/US6251338B1/en not_active Expired - Fee Related
  • 1998-07-01 EP EP98939597A patent/EP0996748B1/fr not_active Expired - Lifetime

Non-Patent Citations (1)

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