US3632100A - Device for driving a sampling or sensing lance for a shaft furnace - Google Patents

Device for driving a sampling or sensing lance for a shaft furnace Download PDF

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Publication number
US3632100A
US3632100A US30012A US3632100DA US3632100A US 3632100 A US3632100 A US 3632100A US 30012 A US30012 A US 30012A US 3632100D A US3632100D A US 3632100DA US 3632100 A US3632100 A US 3632100A
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US
United States
Prior art keywords
lance
furnace
chains
gripping
jaws
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US30012A
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English (en)
Inventor
Werner Schneider
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Dango and Dienenthal KG
Original Assignee
Dango and Dienenthal KG
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Filing date
Publication date
Priority claimed from DE19691928629 external-priority patent/DE1928629C/de
Application filed by Dango and Dienenthal KG filed Critical Dango and Dienenthal KG
Application granted granted Critical
Publication of US3632100A publication Critical patent/US3632100A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B7/00—Blast furnaces
    • C21B7/24—Test rods or other checking devices

Definitions

  • the invention relates to a device for advancing and withdrawing a sampling or sensing lance into and out of a shaft furnace through an opening in the wall of the furnace.
  • the device includes at least two driven endless chains which are equipped with gripping jaws. Parts of the runs of the chains are adjacent and parallel to one another and grip the lance between them.
  • the invention relates to a device for use in taking samples from a shaft furnace, particularly a blast furnace, and for measuring temperatures and gas pressures in the furnace, with a sampling lance mounted on a furnace platform and arranged so that it can be driven by a power drive into an out of the charge in the furnace, through an opening in the wall of the furnace equipped with a stufiing box seal and a shutoff valve.
  • the lance is driven by threaded spindles arranged on either side of the lance on the furnace platform, the spindles being powered by an electric motor.
  • the lance has guiding rollers on its rear end, which travels in a guiding frame mounted on the furnace platform.
  • a hydraulic ram mounted on the guiding frame drives the sampling lance, the hydraulic ram being supplied with hydraulic fluid by a variable pump.
  • looped cable drives and chain drives for the lance are also known looped cable drives and chain drives for the lance.
  • the lance is driven forwards by a driving device, for example a clamping fork or a crosshead or the like which grips the lance over a comparatively short part of its entire length, the gripping point being usually near the rear end of the lance.
  • a driving device for example a clamping fork or a crosshead or the like which grips the lance over a comparatively short part of its entire length, the gripping point being usually near the rear end of the lance.
  • the arrangement applies excessive local stresses to the lance near the driving point, and the entire lance can become bent out of shape.
  • the object of the present invention is to remove these difficulties and to provide a device for driving a sampling and measuring lance into and out of the charge in the furnace at a practically constant speed, which is however variable at will over a wide range, the entire device being exceptionally short and very light and simple in construction, making it unnecessary to provide any special sort of furnace platform, particular care being taken to ensure that the gripping device used does not apply a bending or kinking stress to the lance and yet grips the lance securely enough to prevent any risk of slipping.
  • a further object is that although the gripping device must grip the lance securely, nevertheless it must not apply such high local pressures to the surface of the lance that there is a risk of squashing it out of shape.
  • the device does not merely grip the lance between two jaws, moving it intermittently, as happens in the case of the pneumatic ram drive mentioned above.
  • the lance is constantly trapped between, say, 8 to 10 gripping jaws on either side and advanced or retracted continuously, the constant, multiple gripping effect obtained being so secure that slipping is reliably excluded, and this without the application of excessive local pressures to the surface of the lance.
  • the lance is gripped continuously over a large area of its surface, preventing slip without giving rise to any danger of squashing the lance.
  • the entire device can be made exceptionally short overall, because the driving device as a whole remains stationary, the gripping jaws circulating around a closed circuit. This considerably simplifies the entire construction of the device, which can be made quite light in weight and does not require the construction of a special supporting platform.
  • each chain is a roller chain and has rollers mounted to rotate on the ends of the link pins and running along plates or rails situated on either side of the lance, at least one of the plates or rails being spring loaded so that the gripping jaws are thrust resiliently against the surface of the lance.
  • each clamping jaw may be individually spring loaded, or resiliently mounted, for example by interposing a rubbermetal insert between the jaw and its support.
  • each jaw can have a surface layer, on its working face, made of heat resistant, nonslip and wear resistant synthetic material, or the jaw itself can be made mainly of a material of this kind.
  • the chains in order to drive the lance at a constant, even speed in its forward and backward movements, the chains are driven through a driving gear which is preferably steplessly variable, and through a pair of meshing gear wheels, one for each chain, the power being provided by a single motor.
  • the drive is preferably situated at the end of the device away from the furnace, for protection against temperature, dust and other influences derived from the furnace.
  • the spring loaded tension pulleys for the other ends of the chains can be at the furnace end of the device.
  • the entire device may be mounted to rotate on a vertical pedestal, which can be constructed as a hydraulic cylinder so that the device can be raised and lowered.
  • the introduction and retraction of the lance involves considerable longitudinal forces.
  • To prevent the reaction forces from being transmitted to the pedestal there are preferably disconnectable straps for securing the furnace to the wall of the furnace, and the device is mounted so that it can slide longitudinally, between limiting stops, on horizontal bearing pins mounted on the vertical pedestal, or on a supporting plate which is free to rotate on the pedestal.
  • a cleaning bush near the furnace end of the device, through which the lance passes.
  • FIG. 1 is a side elevation
  • FIG. 2 is a plan
  • FIG. 3 shows the device swung around through from its working position
  • FIG. 4 is a section taken on the line IV-IV in FIG. 1;
  • FIG. 5 is a section taken on the line VV in FIG. 1.
  • the device is mounted on the platform 1 of a shaft furnace, for example a blast furnace.
  • the device serves for driving a lance 3 into and out of the charge in the furnace, for obtaining samples and measuring gas temperatures and/or pressures.
  • the lining 4 of the furnace 2 contain a guide bush 5 for the lance. Mounted on the guide bush 5 there is a shutofi valve 6 and a stuffing gland 7.
  • the lance 3 is water cooled and in FIGS. 1 and 2 it is shown introduced into the charge.
  • the lance is driven by a roller chain drive 8 consisting of two roller chains 10 mounted parallel to each other above and below the lance 3, in a frame 9. Mounted on the ends of the link pins 11 of each roller chain 10, on either side of the chain links 12, there are rollers 13. Attached to the chain links 12 between the link pins 11 there are gripping jaws 14 whose working surfaces are concave curved to agree with the outer surface shape of the lance 3. Although in FIGS. 4 and the lance is circular in cross section, it can if desired be oval or of some other shape.
  • the endless chains pass at each end over chain wheels 15 (FIG. 5), those furthest away from the furnace 2 acting as driving wheels.
  • the two driving wheels 15 are connected together by meshing gear wheels 16 and driven by a preferably steplessly variable drive 17 powered by a motor 18.
  • the motor 18 can be an electric motor, or pneumatic or hydraulic and it is mounted, together with the drive 17 and the two gear wheels 16 near the end of the device furthest away from the furnace.
  • the chains pass over tension wheels 15', each tension wheel rotating in a bearing 19 which is thrust outwards by a spring 20 and retained by a bolt 21.
  • a cleaning bush 22 At the furnace end of the device there is also a cleaning bush 22 through which the lance passes.
  • each jaw 14 can be constructed resiliently, for example interposing a rubber-metal insert between the jaw and its supporting chain link.
  • the grip on the lance 3 can if desired be still further improved by giving the working surface of each jaw a nonslip layer of heat-resistant and wear-resistant synthetic material, or by making the entire jaw of this material.
  • FIG. 3 shows the device on the furnace platform after rotation through 90 from its working position.
  • the device When in its working position the device is secured to the outer shell 31 of the furnace by straps which take the reaction forces during the movements of the lance. To ensure that these reaction forces are taken by the straps 30, and not transmitted to the baseplate 29 of the turntable, the device is mounted to slide longitudinally on horizontal pins 32 which are themselves supported by the turntable 27.
  • a device for advancing and withdrawing a sampling or sensing lance into and out of a shaft furnace through an opening in the wall of the furnace comprising at least two driven endless chains which are equipped with gripping jaws with concave working surfaces, parts of the runs of the chains being adjacent and parallel to one another for gripping a lance between their jaws and carrying the lance to or fro.
  • a device in which the chains are roller chains and rollers mounted on link pins of the roller chains run along rails situated to the sides of the lance, at least one of the rails being influenced by springs so that it thrusts resiliently towards the lance.
  • a device in which the working surface of each gripping jaw is coated with a layer of or substan tially constructed of nonslip, heat-resistant and wear-resistant synthetic material.
  • a device in which the chains are driven reversibly by a common motor through a steplessly variable drive and through meshing gear wheels, one for each of the chains.
  • a device in which the drive for the chains is situated near the end of the device to be remote from the furnace, spring-loaded tensioning wheels for the chains being mounted on bearings situated adjacent to the furnace end of the device.
  • a device which is mounted to pivot on a vertical axle base.
  • a deice according to claim 1 having disconnectable straps for securing the furnace end of the device to the furnace wall or to the furnace outer shell, and a sliding mounting which allows the device so slide longitudinally between limiting stops on horizontal pins supported by a turntable which rotates on a vertical support mounted on a baseplate.
  • a device which is provided with a cleaning muff for surrounding the lance.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Blast Furnaces (AREA)
  • Measuring Fluid Pressure (AREA)
  • Investigating And Analyzing Materials By Characteristic Methods (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
US30012A 1969-06-06 1970-04-20 Device for driving a sampling or sensing lance for a shaft furnace Expired - Lifetime US3632100A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19691928629 DE1928629C (de) 1969-06-06 Vorrichtung zur Probenentnahme und Temperatur- sowie Gasdruckmessung bei Schachtöfen, insbesondere Hochöfen

Publications (1)

Publication Number Publication Date
US3632100A true US3632100A (en) 1972-01-04

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ID=5736150

Family Applications (1)

Application Number Title Priority Date Filing Date
US30012A Expired - Lifetime US3632100A (en) 1969-06-06 1970-04-20 Device for driving a sampling or sensing lance for a shaft furnace

Country Status (5)

Country Link
US (1) US3632100A (ar)
JP (1) JPS5023633B1 (ar)
BE (1) BE751410A (ar)
FR (1) FR2049834A5 (ar)
LU (1) LU60607A1 (ar)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4140301A (en) * 1977-02-16 1979-02-20 Midrex Corporation Method and apparatus for reducing particulate iron oxide to metallic iron with solid reductant
US4361315A (en) * 1979-12-21 1982-11-30 Nippon Steel Corporation Sonde apparatus for blast furnace
US4747581A (en) * 1985-09-30 1988-05-31 Pierre Mailliet Device for the movement of a shaft furnace probe
US5462260A (en) * 1993-05-27 1995-10-31 Paul Wurth S.A. Device for inserting a lance into a pressurized container, in particular a blast furnace
WO2011138629A1 (en) * 2010-05-07 2011-11-10 Wunsche Edgar R Remotely controlled semi-automatic mechanized sampling and temperature measuring probe apparatus for molten steel in metallurgical furnaces
US11530885B2 (en) * 2017-05-05 2022-12-20 Peinemann Equipment B.V. Device for driving a flexible lance

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU522749B2 (en) * 1979-12-21 1982-06-24 Nippon Steel Corporation Sonde apparatus for blast furnace
LU83086A1 (fr) * 1981-01-23 1982-09-10 Wurth Paul Sa Support pour une sonde de haut-fourneau
LU91462B1 (en) * 2008-07-14 2010-01-15 Wurth Paul Sa Insertion and extraction of fuel injection lances into and out of the tuyere stock of a blast furnace

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1135489A (en) * 1913-07-14 1915-04-13 Ralph Baggaley Means for increasing the air-blast of converters and furnaces.
US3439912A (en) * 1965-10-04 1969-04-22 Maerz Ofenbau Frame for injectors in melting furnaces
US3507484A (en) * 1967-11-08 1970-04-21 Tokyo Co Ltd Drilling machine for drilling a taphole in a blast furnace
US3549139A (en) * 1966-07-14 1970-12-22 Demag Ag Blast lance car arrangement for metallurgical furnace

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1135489A (en) * 1913-07-14 1915-04-13 Ralph Baggaley Means for increasing the air-blast of converters and furnaces.
US3439912A (en) * 1965-10-04 1969-04-22 Maerz Ofenbau Frame for injectors in melting furnaces
US3549139A (en) * 1966-07-14 1970-12-22 Demag Ag Blast lance car arrangement for metallurgical furnace
US3507484A (en) * 1967-11-08 1970-04-21 Tokyo Co Ltd Drilling machine for drilling a taphole in a blast furnace

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4140301A (en) * 1977-02-16 1979-02-20 Midrex Corporation Method and apparatus for reducing particulate iron oxide to metallic iron with solid reductant
US4361315A (en) * 1979-12-21 1982-11-30 Nippon Steel Corporation Sonde apparatus for blast furnace
US4747581A (en) * 1985-09-30 1988-05-31 Pierre Mailliet Device for the movement of a shaft furnace probe
US5462260A (en) * 1993-05-27 1995-10-31 Paul Wurth S.A. Device for inserting a lance into a pressurized container, in particular a blast furnace
WO2011138629A1 (en) * 2010-05-07 2011-11-10 Wunsche Edgar R Remotely controlled semi-automatic mechanized sampling and temperature measuring probe apparatus for molten steel in metallurgical furnaces
US11530885B2 (en) * 2017-05-05 2022-12-20 Peinemann Equipment B.V. Device for driving a flexible lance

Also Published As

Publication number Publication date
DE1928629B2 (de) 1972-07-27
FR2049834A5 (ar) 1971-03-26
DE1928629A1 (de) 1970-12-10
LU60607A1 (ar) 1970-05-26
BE751410A (fr) 1970-11-16
JPS5023633B1 (ar) 1975-08-08

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