EP0062769B1 - Procédé pour actionner une goulotte oscillante dans une enceinte sous pression, dispositif pour la mise en oeuvre de ce procédé et installation de chargement d'un four à cuve équipé d'un tel dispositif - Google Patents

Procédé pour actionner une goulotte oscillante dans une enceinte sous pression, dispositif pour la mise en oeuvre de ce procédé et installation de chargement d'un four à cuve équipé d'un tel dispositif Download PDF

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Publication number
EP0062769B1
EP0062769B1 EP82101943A EP82101943A EP0062769B1 EP 0062769 B1 EP0062769 B1 EP 0062769B1 EP 82101943 A EP82101943 A EP 82101943A EP 82101943 A EP82101943 A EP 82101943A EP 0062769 B1 EP0062769 B1 EP 0062769B1
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EP
European Patent Office
Prior art keywords
axis
spout
accordance
fork
suspension
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
Application number
EP82101943A
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German (de)
English (en)
French (fr)
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EP0062769A1 (fr
Inventor
Edouard Legille
Pierre Mailliet
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.)
Paul Wurth SA
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Paul Wurth SA
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Publication date
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Priority to AT82101943T priority Critical patent/ATE11571T1/de
Publication of EP0062769A1 publication Critical patent/EP0062769A1/fr
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Publication of EP0062769B1 publication Critical patent/EP0062769B1/fr
Expired 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
    • C21B7/18—Bell-and-hopper arrangements
    • C21B7/20—Bell-and-hopper arrangements with appliances for distributing the burden

Definitions

  • the present invention relates to a method for actuating an oscillating chute suspended in a pressurized enclosure between two branches of a fork whose body crosses the side wall of said enclosure, the chute being able to pivot around its suspension axis between the two branches of the fork, while said fork can pivot about its longitudinal axis which is arranged orthogonally to said axis of suspension of the chute.
  • the invention also relates to a device for implementing this method in which the body of the chute suspension fork is housed and supported, in a bearing mounted in the side wall of this enclosure.
  • the invention further relates to a loading installation of a shaft furnace equipped with such a device and implementing this method.
  • this type of suspension and drive of the chute is that it can be open, that is to say semi-cylindrical since, taking into account the nature of the movement, it does not never tumbles and always has the same sliding surface at the load. Also due to the nature of the movement and the drive system, this chute is particularly suitable for describing circles or a spiral. The actions of the two controls are, moreover, relatively easy to coordinate in order to make such movements at the chute.
  • the second system is that of oscillating distribution chutes. These chutes are not suspended from a rotating element, but by a pair of perpendicular suspension axes between them and, therefore, often called “cardan suspension".
  • the chute can pivot around each of these two axes which are for this purpose each connected to a control mechanism whose coordinated action generates the desired movement of the chute.
  • the peculiarity which characterizes this system, as opposed to the previous system, is that the chute must be tubular, since in order to reach the entire unloading surface, it must tilt on itself and, therefore, its entire inner surface is exposed the sliding of the distribution material.
  • German patent application 2,104,116 and also in German patent application 2,825,718 which more particularly relates to a system for suspension and control of a chute of the kind described in the preamble.
  • the oscillating chutes have certain non-negligible advantages compared to the rotary chutes, the oscillating chutes have remained at the planning stage and have not yet been implemented at present.
  • the advantages one can cite, among other things, the ease of dismantling the chute and its suspension and control system, for certain types of design, such as that described in the aforementioned German patent application 2 825 718.
  • a another advantage is the fact that the entire inner surface of the chute is exposed to friction from the loading material and that the wear is therefore more uniform, but slower compared to rotary chutes where it is always the same part which is exposed to friction from the loading material.
  • the object of the present invention is to propose a new method and device for controlling an oscillating chute of the kind described in the preamble, which is simpler and more reliable and which in particular makes it possible to move the distribution chute according to circles or according to a spiral, without resorting to complicated and expensive control devices and without sacrificing the advantages acquired.
  • the method according to the invention is characterized in that the movement which the chute must perform is imparted, by means of an appropriate drive mechanism, to an oscillating control member having the same degrees of freedom as the chute, but mounted outside the enclosure and in that, at by means of an appropriate transmission, the movement of the control member is reproduced on the chute.
  • control member and, consequently, also the chute, in order to move them both along conical surfaces with equal apex angles and the guidelines of which are circles.
  • the invention also relates to a device for implementing the method, in which the body of the chute suspension fork is housed and supported, in a bearing mounted in the side wall of the enclosure, characterized in that said control member is mounted on a pivot axis passing through the fork, outside the enclosure, parallel to the axis of suspension of the chute, in that at least the body of the fork is hollow and contains a mechanism transmission to transform a pivoting of the control member around its pivot axis into a corresponding pivoting of the chute around its suspension axis.
  • control member also pivots, in a plane different from that defined by its pivot axis, the latter is forced to tilt to follow this movement of the control member, which causes a corresponding tilting of the body of the vuspension fork around its longitudinal axis, as well as the suspension axis of the chute, that is to say that the latter performs exactly the same movement as the control member.
  • the control member is designed in the form of an arm parallel to the axis of the chute and its drive mechanism comprises a slide curved in an arc of a circle whose angle is substantially equal to double the maximum angle of inclination of the chute with respect to the vertical, the radius of curvature of which corresponds to the length of the control member and which is mounted in such a way that its center of curvature is located on the pivot axis of the control member, a toothed sector slidably mounted on the slide, this sector having the same curvature as the slide and a length slightly greater than half of it, a rotary connection between one the ends of this sector and the control member, first means for rotating the slide and the toothed sector around an axis parallel to the central axis around which the chute must evolve and second means for sliding the sector toothed in the slide and change the inclination of the control member relative to the axis around which the slide rotates as a result of the action of said first means.
  • the suspension fork is hollow and the transmission mechanism may be constituted by a rod in the form of a bident capable of sliding in the direction of the longitudinal axis of the suspension fork and connected, for this purpose , at its outer end, by means of a lever to the pivot axis of the control member and by its two opposite ends, to two arms integral with the chute or its suspension axis, the length of the connecting rod being such that the longitudinal axis of the chute is parallel to said lever.
  • the transmission mechanism may also be constituted by a rotary transmission shaft provided at each of its ends with segmented bevel gears, undergoing the action of a bevel gear fixed on the pivot axis of the control member, l 'other transmitting the rotational movement on a toothed sector connected directly, or indirectly, to the axis of suspension of the chute.
  • the control member comprises a toothed sector pivotable about an axis corresponding to the longitudinal axis of the fork and supported by two consoles capable of turning around an axis of rotation parallel to the central axis around which the chute must evolve and a rod whose longitudinal axis is parallel to the longitudinal axis of the chute and which is connected by a rotary connection to a base incorporated in a shaft whose axis constitutes said pivot axis of the control member, while the drive mechanism of the control member comprises first means for rotating said consoles around the axis and second means, independent of the first for changing the inclination of said rod relative to the axis of rotation.
  • the suspension fork is hollow and is designed in the form of a double fork comprising two branches inside for the suspension of the chute and two branches on the opposite side, the control member being mounted between these last two branches.
  • said slide or said consoles can be mounted at the end of a first rotary hollow control shaft, driven by a first motor, while a second rotary control shaft , arranged coaxially inside the first, and being able to rotate independently of the latter, comprises at one of its ends a pinion forming a rack with said toothed sector and the other end of which is driven by a second motor, independently of the first , but mounted on a chassis secured to the rotary hollow shaft driven by the first motor.
  • the slide or the consoles are part of a rotary cage, or of a rotary plate provided with an external toothed ring driven by a first motor to rotate the cage or plate, with the slide. and the toothed sector around an axis parallel to the central axis around which the chute must evolve, while a second motor independent of the first, acts via a reduction system on a pinion forming a rack with the toothed sector to change the inclination of the control member port to said axis of rotation.
  • the second motor can be mounted on said box or plate outside its axis of rotation and gravitate with it around this axis.
  • the second motor is mounted on the axis of rotation of the cage or the plate and its carcass is fixed to the chassis of the device while a clutch device is provided to make the rotor of this motor integral with said cage or plate or to release it.
  • the invention also relates to a loading installation of a shaft furnace comprising a vertical supply channel mounted in the head of the furnace and connecting one or more external loading locks inside the furnace, an oscillating chute for distributing the loading material mounted immediately downstream of the channel and a device for suspending and controlling the oscillating chute of the kind described above.
  • the entire suspension and control device for the chute including the drive mechanism for the control member and the bearing in which the suspension fork is housed, is mounted in a chassis detachably fixed on a side flange of the furnace head. This allows easy and quick disassembly of the entire control unit with the chute without the need to disassemble it inside the furnace head.
  • the suspension fork of the chute can be arranged substantially horizontally or, according to an advantageous embodiment, in an inclined manner. The latter possibility further facilitates the dismantling operation of the chute.
  • This inclined arrangement also has the advantage that the suspension fork can be more compact, in particular shorter.
  • the suspension fork of the chute is designed, at least in part, in the form of a sealed box inside which the transmission mechanism evolves reproducing the pivoting of the control member on the chute. Inside this box, a coolant circulation is established, which reduces the harmful influence of the high temperature inside the oven on the transmission mechanism.
  • the invention therefore makes it possible to minimize the number of mobile mechanical elements exposed to the harmful conditions prevailing inside the furnace head. In fact, the only mobile element exposed is the distribution chute.
  • a system is provided to adapt the pressure of the cooling fluid sent into the suspension fork of the chute to the pressure prevailing in the head of the oven. This relieves the seals made necessary by this circulation of the coolant in the suspension fork and reduces the risk of a possible leak.
  • the reference 20 designates the head of a top pressure furnace, in which the loading material must be charged from an upper airlock not shown, through a vertical supply channel 22 disposed along the vertical axis 0 at the top of the blast furnace.
  • the distribution of the loading material introduced through the channel 22 is carried out using an oscillating chute 24 whose shape is preferably frustoconical, as shown in the figures.
  • This oscillating chute 24 is suspended between two branches 28, 30 of a fork 26 which is mounted in the side wall of the head 20 of the oven so as to be able to pivot around its longitudinal axis X. Independently of this possibility of pivoting of the fork 26 around the axis X, the oscillating chute 24 can pivot around its suspension axis Y (see FIG. 3) between the two branches 28 and 30.
  • the fork 26 is mounted in leaktight manner in a wall 36 separating a casing 32 for controlling and driving the interior of the head 20 of the furnace, this casing 32 being mounted, in a removable manner, on a flange 38 of the carcass 34 of the head 20 of the blast furnace, this carcass 34 being welded directly to the shield of the furnace.
  • the fork 26 is housed, by its body 44, in a bearing 40.
  • This bearing 40 will preferably be a pair of tapered roller bearings.
  • the tightness of the suspension of the fork 26, that is to say the tightness between the interior of the blast furnace and the interior of the casing 32 is ensured by a conventional cable gland 42.
  • a control member 46 mounted on a shaft 48 passing through the fork 26 and able to rotate about its axis Y ', the shaft 48 preferably being arranged so that its axis of rotation Y' is parallel to the axis Y of suspension of the chute 24.
  • This control member 46 therefore has the same degree of freedom as the chute 24, in particular the possibility of pivoting around the axis Y 'and the possibility of being able to pivot with the fork 26 around the longitudinal axis X of the latter.
  • the basic idea of the present invention therefore consists in animating the control member 46 with the movement that it is desired to have performed by the chute 24.
  • a transmission mechanism is required to reproduce the pivoting of the member control 46 around the axis Y 'on the chute 24 so that the latter pivots, in a similar manner, around its axis Y, the transmission of the pivoting in a perpendicular direction, in this case around the axis X , being provided by the fork 26 itself.
  • FIGS 9 and 10 schematically illustrate a first embodiment of such a transmission mechanism mounted inside the fork 26.
  • a rod 50 in the form of bident it is that is to say comprising a sensitive evolving rod 56 ment in the body 44 of the fork 26, as well as two branches 52 and 54 located respectively in the branches 28 and 30 of the fork 26.
  • the ends of the two branches 52 and 54 are connected by means described in more detail by the following the chute 24 or its pivot axis.
  • the end of the rod 56 is connected by a lever 58 to the shaft 48.
  • the fork 26 Since the transmission rod 50 is made in a single cast part or in welded sheet metal, the fork 26 must be removable in order to be able to mount the transmission mechanism comprising the rod 50 and the lever 58.
  • the body 44 of the fork 26 is detachably connected at 60 to the two lateral branches 28 and 30.
  • Figures 7 and 8 also show that the outer sides of the two branches 28 and 30 have openings 62 and 64, relatively large, in order to be able to mount mechanisms ensuring the connection between the ends of the branches 52 and 54 and the axis of suspension of the chute 24.
  • a similar opening 66 allowing the mounting of the shaft 48 and the lever 58.
  • FIGS. 1a and 2a These two extreme positions are also illustrated by FIGS. 1a and 2a, in which the transmission mechanism is shown diagrammatically by a parallelogram, symbolizing the parallelism between the chute 24 and the control member 46.
  • the control member 46 is pivoted in a plane perpendicular to the previous pivot plane, which is the plane of Figures 1 and 2, that is to say that the angle between the longitudinal axis of the member 46 and the vertical is kept constant and that this member 46 pivots in a plane perpendicular to the plane of FIGS. 1 and 2, that is to say a plane defined by the axis Y 'and the longitudinal axis of the member control 46, the fork 26 pivots about its longitudinal axis X, that is to say that the chute 24 is tilted in the plane of FIG. 3 and the angle that the axis of the chute 24 makes, on the Figure 3, with the vertical varies according to the amplitude of pivoting of the control member 46.
  • This pivoting is illustrated by the arrow A in Figure 3a.
  • the chute 24 follows exactly the movement of the control member 46, this as well during the pivoting around the axis Y as during the pivoting around the axis X. Consequently, by combining these two pivotings, the chute 24 always remains parallel to the control member 46 and performs the same pivoting movement as the latter. More particularly, if the end of the control member 46 is moved in a circle, that is to say that it evolves on a conical surface whose apex is located on the axis Y ', the chute 24 performs the same movement around the vertical axis 0 of the oven and its lower end also describes a circle. This movement is illustrated schematically by arrows in Figures 1a and 2a.
  • suspension and control system of the chute proposed by the invention allows a discharge of the loading material in concentric circles, or even in a spiral, that is to say the two loading modes considered. currently as giving the best results. It suffices for this to provide a suitable drive mechanism for moving the end of the control member 46 in concentric circles or in a spiral.
  • FIGS 1, 2 and 4 schematically illustrate a first embodiment of a drive mechanism for imparting to the control member 46 the movement which it is desired to have performed by the chute 24.
  • This control mechanism essentially comprises a drive unit 68 mounted on the outside, preferably removably, on the casing 32.
  • Two coaxial control shafts 70, 72 penetrate from the drive unit 68 through bearings and possibly seals inside the casing 32.
  • One of these control shafts, in this case the external control shaft 70 carries inside the casing 32 a slide 74 curved in an arc of a circle whose angle corresponds substantially to twice the maximum angle of inclination of the chute with respect to the vertical axis O.
  • This slide 74 is arranged in such a way that its radius of curvature is equal to the length of the control member 46 and that the longitudinal axis of the two control shafts 70 and 72 pass pa r the center of curvature of the slide 74, this center of curvature having to be situated on the axis Y ′ of pivoting of the control member 46.
  • a toothed sector 76 having the same curvature as the slide 74 and a length slightly greater than half thereof is slidably mounted on the lower concave face of the slide 74.
  • a rotary connection 78 is provided between the end of the control member 46 and one of the two ends of this toothed sector 76.
  • This rotary connection 78 can be produced simply by means of a roller ment provided on the toothed sector or on the control member 46 and a pin provided on the other of these elements and engaged in this bearing.
  • the toothed sector 76 forms a rack with a pinion 80 fixed to the end of the internal control shaft 72 which coaxially crosses the external shaft 70.
  • the drive unit 68 is designed to independently operate the two control shafts 70, 72.
  • a first worm screw 82 actuated by a motor not shown drives via a reduction system composed of a worm wheel end 84 and pinions 86, 88, the external control shaft 70.
  • On this control shaft 70 is fixed a second drive group comprising a second motor, not shown, driving via a worm 90 and a worm wheel 92 the internal control shaft 72. Since this second group rotates in block with the control shaft 70, its motor must be supplied by means of friction contacts well known per se and not shown in the figure.
  • the entire suspension and control device, as well as the distribution chute can be dismantled as a unit simply by loosening the flanges 38 and removing the whole assembly through the opening lateral in the carcass 34. It suffices to place the chute 24 in the position according to FIG. 2 and to clear or remove the channel 22. After that, the chute is tilted in the position according to FIG. 1 from where it can be easily removed without removing it from its suspension. This will be explained in more detail later.
  • FIGS. 5 and 6 a second embodiment of a drive mechanism has been shown for printing on the control member 46 the movement which it is desired to cause to be effected by the chute 24. It should however be noted that the drive mechanism used in Figures 5 and 6 is not related to the inclined arrangement of the fork 26 and that one could just as easily use the drive mechanism of Figures 5 and 6 with the realization of Figures 1 and 2 and vice versa.
  • control member 46 is connected by means of a rotary link 102 to a toothed sector 104 sliding on a slide 103, the latter as well as the toothed sector 104 having a curvature and an arrangement analogous to the previous embodiment.
  • the slide 103 is integral with a rotary cage 106 supported by means of a bearing 108 in the chassis of the casing 94.
  • This rotary cage 106 is provided with an external toothed ring 110 forming a gear with a pinion 112 driven by a first motor electric 114.
  • a second motor 116 is provided, fixed on the cage 106 and gravitating with it around the 0 'axis.
  • This second motor 116 is connected via a worm gear system 118 to a pinion 120 forming a rack with the toothed sector 104.
  • the supply of the motor 116 is also carried out by means of friction contacts not shown. on the face.
  • FIGS 11 and 11a show a third embodiment which differs essentially from the previous ones by the design of the suspension system of the chute and the drive mechanism thereof.
  • This mechanism also includes a suspension fork, represented as a whole by the reference 126 and comprising a substantially cylindrical body 128 housed and supported in the bearing 40 of the wall separating the interior of the oven from the control housing 32.
  • This fork 126 comprises also two branches for suspending the chute 24, only the branch 130 being visible.
  • the movement transmission mechanism generated by the control member 46 consists essentially of a rotary transmission shaft 132 housed in a pair of bearings 134, 136 inside the body 128 of the fork 126.
  • the tilting of the control shaft 48 is transmitted, as for the other embodiments, by pivoting of the fork 126 inside the bearing 40.
  • this shaft 142 is transformed by means of a parallelogram system comprising two arms 144, 146 and two connecting rods 148 and 150 (see also FIG. 11a) in pivoting of the trough 24 around its axis of suspension Y.
  • FIG. 11 shows, by way of illustration, a system similar to that of FIG. 1 and which, therefore, will no longer be described in detail with reference to FIG. 11.
  • FIG. 12 illustrates a simplified variant of the embodiment according to FIG. 11.
  • the chute 24 is supported by a fork 156 also comprising a cylindrical body 158 housed in the bearing 40.
  • This fork also comprises two branches between which the chute is suspended , only the branch 160 being visible.
  • the pivoting of the control shaft 48 is also transformed by a pair of conical toothed sectors 164 into a rotation of a shaft 162 passing coaxially through the body 158 and supported by bearings and seals.
  • This shaft 162 carries at the end opposite to that of the shaft 48 a conical toothed sector 166 cooperating with another conical toothed sector 168 fixed directly on one of the suspension pivots of the chute.
  • the fork is designed as a closed box, completely surrounding the transmission mechanism, in the embodiment according to FIG. 12, only the body 158 of the fork 156 is closed, while the two toothed sectors 166 and 168 evolve in the atmosphere prevailing above the loading surface. It should also be noted that the tilting of the chute 24 around the axis Y is generated only on one of the two suspension sides.
  • the suspension fork of the chute is, except for the embodiment according to Figure 12, designed as a sealed box and the mechanism for transmitting the pivoting movement around the axis It evolves completely inside this box. It was therefore necessary to use tricks to suspend the chute and communicate the movement of the transmission mechanism evolving inside this box.
  • the particular design of this suspension will be explained below with reference to Figures 13 to 16.
  • the chute 24 is carried by its upper part in an annular cradle 180, the inner surface of which perfectly matches the frustoconical outline of the chute 24.
  • the chute can, in addition, as the show the figures, include an upper rim 184 resting on a corresponding seat of the cradle 180.
  • a retaining ring 182 can be provided housed in a peripheral groove of the chute 24 and bordering the lower part of the cradle 180. To release the chute 24 from its cradle 180, it is therefore sufficient to simply cut off the ring 182.
  • the cradle 180 is secured to an arm 186 in the shape of an “inverted L”, the lower end of which is provided with an opening in which is engaged a pivot 188 of the branch 54 of the transmission rod 50 (see FIGS. 7 to 10 ) located inside the suspension fork 26.
  • the arm 186 also has a bore through which it is engaged on a pin 190, around which it can rotate freely while being carried by the latter.
  • This pin 190 is part of the suspension fork and is, according to an advantageous embodiment, provided on the inner face of a cover 192 welded or screwed on the opening 62 which was already discussed with reference to Figures 7 and 8
  • This cover 192 moreover comprises an auxiliary cover 194 provided so as to allow access to the joint between the pivot 188 and the arm 186, in particular for mounting and dismounting a retaining ring on the pivot 188 .
  • the cradle 180 comprises on each side a flange on which is applied a corresponding flange of an arm 186 for tightening by means of the screw 196.
  • these are each provided a crown of radial grooves 198 which penetrate each other (see Figures 13a and 14a).
  • the suspension fork is produced in the form of a closed box and of the production of the suspension according to FIGS. 13 and 14 to cool and possibly lubricate the suspension of the chute through the suspension fork.
  • the connection between the suspension fork and the cradle 180 is sealed by means of a sealing ring 200, or by other suitable means suitable for this purpose, and surrounding the arms 186 at their level. passage through the inner wall of the branches 28 and 30 of the suspension fork 26.
  • a gas or liquid may be used for cooling and possibly lubrication purposes.
  • a gas or liquid may be used for cooling and possibly lubrication purposes.
  • Such liquids or additives are well known in hydraulic water techniques and are commonly used as hydraulic liquids.
  • this fluid can be achieved, as shown in particular in Figure 1, through a sleeve 202 secured to the body 44 of the suspension fork 26, and rotatably supported in the rear wall of the control unit 32.
  • the embodiment may include a rotary connector 208 connected to one or, preferably, two pipes 204, 206 for admitting the fluid in question.
  • This fluid then circulates through two pipes 210, 212 which exit from the sleeve 202, which run along the outer walls of the fork 26 and which penetrate inside the oven passing between the walls of the suspension fork and the bearing 40, so as to be able to follow the pivoting movement of the fork 26 around the axis X.
  • These pipes 210, 212 penetrate respectively into the two branches 28 and 30 of the suspension fork 26, this through a bore 214, coaxial with relative to the Y axis in each of the journals 190.
  • the cradle 180 comprises, for cooling, two interior semi-spherical channels 220, 222, separated from each other by a partition 224 at level of each suspension.
  • Each of the channels 220 and 222 is connected to the bore 214 of the corresponding pin through an internal pipe passing through the striated flanges 198 and a part of the corresponding arm 186.
  • FIG. 13 shows the internal pipe 216 connecting the channel 220 to the pipe 212 through its corresponding journal 190.
  • the channel 222 is connected in the same way, on the opposite side, to the pipe 210.
  • Each of the channels 220 and 222 in the cradle 180 comprises an outlet pipe 218 (see FIG. 14) connecting the channel concerned inside each of the branches 28 and 30. From there, the fluid fills the entire interior space of the suspension fork and leaves it through the man chon 202 and an outlet pipe 223. It should be noted that the two interior pipes 216, 218 are placed side by side as shown in FIGS. 13a, 14a and 15, their spacing corresponding to the partition 224 between the channels 220 and 222 .
  • FIG. 16 shows an embodiment with a closed circuit.
  • the outlet pipe 223 directs the cooling fluid through a coil 228 immersed in the coolant of a heat exchanger 226.
  • Circulation is ensured by two pumps 230, 232 collecting the fluid at the outlet of the exchanger 226 and l 'expelling respectively into the intake pipes 204, 206 through filters 234 and 236 known per se. It would be possible to provide only one pump, but to ensure uniform distribution in the two pipes 210 and 212, it is preferable to use two.
  • the pressure of the cooling fluid is adjusted to adapt it to the pressure prevailing inside the furnace.
  • a pressure equalization device 238 intended to increase or decrease the pressure of the cooling fluid as a function of pressure fluctuations inside the oven.
  • This function can be fulfilled by a device known per se comprising a diaphragm 240 one of the sides of which is exposed to the pressure prevailing inside the oven, for example through a filter 242 and the other side of which is in contact with the coolant.
  • Line 244 designates a line connecting the cooling circuit to a supply of cooling fluid to ensure that the circuit is always filled.
  • the present invention allows an extremely easy disassembly and reassembly of the chute and more particularly when the inclined configuration according to FIG. 5 has been adopted.
  • a simple system will now be described with reference to FIGS. 17, 18 and 19 to make this replacement.
  • This lifting arm 256 is designed to be made integral with the casing 94 and to be able support the assembly formed by the casing 94, the chute 24 and the drive mechanism after release of the attachment to the flange 96.
  • the vertical supply channel is divided into two independent parts, namely an upper part 22a in the form of a funnel intended to remain in place and a removable cylindrical lower part 22b.
  • the latter is held in place, that is to say in the extension of the upper part 22a by means of several (at least three) props 260 arranged at regular intervals around the channel 22 in the carcass 100 of the head 20 of the oven.
  • props 260 simply hold the lower part 22b by penetration into a circular groove 258 provided, for this purpose, around this lower part 22b of the channel.
  • a locking system is provided to maintain these props in the depressed position according to FIG. 17 to ensure the maintenance of the channel 22.
  • the lower part 22b of the channel further comprises an external lateral hook 262 intended to cooperate, by penetration, with a lug 264 provided on the upper edge of the chute 24 and, by wedging, with a notch formed below the lug 264 by a suitable piece 226 welded to the chute 24.
  • the first operation consists of securing the lifting arm 256 of the carriage 250 with the wall of the housing 94. After that we can unscrew the fixing at the level of the flange 96. The assembly formed by the chute 24, the casing 94 and its contents therefore rests on the carriage 250.
  • FIG. 20 which shows a second embodiment of a system for dismantling and reassembling the chute 24, the vertical supply channel 22 is also divided into two parts 22c and 22d.
  • the lower part 22d which is also independent of the upper part 22c, is suspended from a pivoting arm 270 passing through the carcass 100 of the head of the furnace. Outside, this pivoting arm 270 can be actuated by a suitable means, such as a motor, a jack or even a crank, in order to pivot the lower part 22d from the central position to the release position illustrated in FIG. 20.
  • a suitable means such as a motor, a jack or even a crank
  • Figures 21 and 22 show an advantageous variant of the mechanism according to Figure 5 for actuating the control member 46.
  • a rotary cage 280 supported in the chassis of the casing 94 and able to rotate freely by relative to the latter by means of bearings 282.
  • a double slide 274 in an arc of a circle, the curvature of which is also located on the axis Y ′ of rotation of the control member 46 is integral with the lower part of this cage rotary 280.
  • a toothed sector 276 whose connection with the control member 46 is ensured by a rotary link 278 transforming the rotation, around the 'axis O' of the toothed sector 276 in pivoting of the control member 46 about this same axis.
  • the toothed sector 276 comprises, as shown in FIG. 22, two rows of gears forming a rack with two pinions 290, 292 carried by a rotary transverse shaft inside the cage 280. Between these two pinions 290 and 292 is a worm wheel 294, carried by the same shaft, and capable of being driven by means of a worm 296, a pair of reduction gears 298 and a shaft 300 passing through the next cage axis 0 '.
  • This shaft 300 is integral with the rotor 302 of a motor 301, the stator and the housing of which are represented by the references 304 and 306 respectively.
  • this motor 301 has the characteristic of being a motor 301 and, therefore, fixed, and that it is arranged so that its rotor 302 and its stator 304 are concentric with respect to the axis 0 '. Means are also provided for making the rotor 302 and the shaft 300 integral in rotation with the cage 280 and for releasing it therefrom.
  • an electromagnetic brake consisting of a disc 308 secured to the shaft 300 and several pads 310 which can be applied, electrodynamically against the disc 308 to secure the latter ci, in rotation of the cage 280.
  • the cage 280 is rotated by means of the worm 284, the motor 301 remaining out of service.
  • the electrodynamic brake ensuring the connection between the rotating cage 280 and the shaft 300 must be closed, so that the assembly formed by the slide 274, the toothed sector 276, the cage 280, the pinions that the latter contains, as well as the shaft 300 and the rotor 302 of the motor 301 rotates as a block around the axis O 'at the speed dictated by the worm 284 driven by its motor.
  • This angular speed around the axis 0 ′ will be, for example, eight revolutions per minute, if the same speed is used as that of the rotary chutes currently used.
  • the cage 280 must remain stationary and the motor which actuates it remains out of service.
  • the electromagnetic clutch between the cage 280 and the rotor 302 of the motor 301 is open and the latter is made independent of the cage 280. By actuating this motor, the shaft 300 will pivot, by means of the various pinions , the toothed sector 276 and the control member 46.
  • the action of the motor 301 may be very slightly different depending on the direction of rotation of the other motor, or depending on whether it is to raise or lower the chute.
  • the cage 280 rotates
  • the rotor 302 rotates at the same speed, that is to say approximately eight revolutions per minute. Consequently, these eight turns are added to, or deducted from the number of turns printed on the rotor 302 by the action of the stator 304.
  • there is a difference of sixteen turns per minute depending on the direction of rotation, there is a difference of sixteen turns per minute. Knowing however that, when the motor 301 is activated, it rotates at around one thousand five hundred revolutions per minute, this theoretical difference corresponds approximately to one percent, which, from a practical point of view, can be considered as zero.
  • the reference 312 represents a device for simulating and reproducing the tilting movement of the chute, which is based on the detection of the actual number of revolutions of the rotor 302 of the motor 300.
  • This simulation system can, for example, be constituted by a game miniaturized differential and planetary gears, the movement of which is transmitted in a device 314 for monitoring and controlling, automatic or not, the movement of the distribution chute 24.
  • This device 314 can, of course, also inform the operator permanently about the exact inclination of the chute.
  • the advantage of the drive device in FIGS. 21 and 22 compared to the similar device in FIG. 5 is that the motor 301 is mounted around the axis 0 'and can be fixed. It is therefore not necessary to have rubbing contacts to ensure its supply, unlike the embodiment of FIG. 5, where the motor 116 is eccentric relative to the axis 0 'and performs a gyratory movement around that -this.
  • Figures 23 and 24 illustrate a simple and effective embodiment of the connection between the drive mechanisms and the control member and applicable to the various embodiments described above.
  • a slide 320 corresponding to the slides 74, 103, or 274, has an inverted "U" profile, in the hollow of which the sector 324 slides. This slide 320 in fact forms only a guide rail for this toothed sector 324.
  • the stirrup-shaped control member 322 comprises a frustoconical rod 326 engaged through a pair of bearings 328 and 330 housed in a bore provided for this purpose in the toothed sector 324.
  • This pair of bearings 328, 330 therefore allows a pivoting about the axis 338 between the rod 326 and the sector 324 during the rotation of the latter around the axis 0 '.
  • connection element between the control member 322 and the toothed sector 324 is superfluous, the two bearings 328 and 330 being able to be automatically held in place by the conical shape of the rod 326 and the bore 336.
  • the reference 332 designates the pinion cooperating with the toothed sector 324 to slide the latter in the slide 320.
  • This pinion is provided at the bottom of the slide 320 between the two guide flanks of the latter and is carried by a shaft 334 driven by a worm wheel 340.
  • the control member 350 is constituted by a toothed sector 352 which can pivot about an axis of rotation 360 supported by two consoles 362, 364 secured to a rotary plate 366.
  • the control member 350 further comprises a rod 354 whose longitudinal axis is parallel to the longitudinal axis of the chute and which can pivot in a base 358 by means of a rotary link provided by one or more bearings 356.
  • the bearing or bearings 356 in fact correspond to bearings 328 and 330 described in relation to FIGS. 23 and 24 and exercise the same function, that is to say allow relative pivoting between the base 358 and the rod 354.
  • the control mechanism illustrated in Figures 25 and 26 implies the presence of a chute suspension fork designed as a double fork represented by the reference 370 in Figures 27 and 28.
  • This double fork 370 has a pair of branches 372, 374 for the suspension of the oscillating chute shown schematically by the reference 376 and a pair of branches 378, 380 between which is mounted the base 358 undergoing the precession movement imposed by the control member 350.
  • the base 358 is part of a shaft 382 corresponding, for example, to the shaft 48 of FIG. 1, and arranged along the axis Y ′ parallel to the suspension axis Y of the chute (see also FIG. 28) .
  • This shaft 382 of which only a part has been shown in FIG. 25 crosses each of the two rear branches 378 and 380 of the fork 370.
  • the bearings 384 allow the rotation of the shaft 382 around the axis Y ', while the sealing means, not shown, allow the circulation of a cooling liquid inside the fork 370, as explained previously with reference to the fork 26.
  • the base 358 is separated from the shaft 382, which is shown in the figure by a screw 390 axially passing through the shaft 382 and ensuring its attachment to the base 358.
  • the contact between the base 358 and the shaft 382 is advantageously produced by flanges each comprising a ring of radial grooves as described above with reference to FIGS. 13a and 14a.
  • the design of the branch 380 of the fork 370 and its connection with the base 358 is similar to the design of the branch 378 and will not be described in detail.
  • the rotation of the control member 350 about the axis It is caused by the rotation of the rotary plate 366 connected to a fixed frame 368 by means of a bearing 392.
  • the rotary plate 366 is provided with a peripheral toothed crown 394 cooperating with a pinion 396, in turn driven by a first motor, not shown, by means of a worm 398 and a worm wheel 400.
  • the sector 352 is a rack with a pinion 402 mounted on a shaft 404 between the two brackets 362 and 364.
  • This shaft 404 is driven by a worm wheel 406 whose worm 408 receives the movement of a pinion 410 capable of turning around its own axis and of gravitating with the plate 366 around the axis 0 '.
  • the pinion 410 is attacked by a pinion 420 fixed on the output shaft 418 of a motor 412 whose stator and rotor are designated respectively by 416 and 414.
  • the motor 412 is, like the motor 300 of FIGS. 21 and 22, mounted so that the axis of its rotor corresponds to the axis O ', that is to say that the carcass of the motor 412 can be secured to the chassis 368.
  • the mechanism illustrated in FIGS. 25 and 26 comprises a clutch, symbolized by the reference 422, similar to the clutch represented by the references 308 and 310 in FIGS. 21 and 22, in order to make the rotor412 integral in rotation with the rotary plate 366 or release it.
  • the shaft 418 carrying the rotor 414 is movable in the axial direction and is permanently subjected to the action of a spring 424 tending to cause the rotor 414 to occupy the position illustrated in the figures, position corresponding to the Clutch 422 closes, making rotor 414 integral with plate 366.
  • stator 416 When stator 416 is energized, rotor 414 is attracted, electromagnetically, against the action of spring 424. As a result of this attraction , the rotor 414 goes up against the stator 416, which brings up the pinion 420 and open the clutch 422 to release the rotor 414 from the rotary plate 366.
  • the references 426 and 428 respectively designate a device for simulating and reproducing the movement of the chute, and a device for automatic monitoring and control similar to the corresponding device represented by the references 312 and 314 in FIGS. 21 and 22.
  • the rotation of the plate 366 causes a conical precession movement of the rod 354 around the axis O 'and, as a result of the rotary connection of this rod 354 with the base 358 and the two arms 378 and 380 of the fork, on the one hand , and the mechanism 388 for translating the movement inside the fork, the chute performs a movement corresponding exactly to that of the rod 354 with the same inclination relative to the vertical axis of the oven as the axis of the rod 354 with respect to axis 0 '.
  • the speed of rotation of the motor 412 is different according to its own direction of rotation and according to the direction of rotation of the other motor, since the effect of the latter affects the speed angular of the rotor 414.
  • this is a theoretical difference corresponding approximately only to one percent of the total speed of the motor, which, from a practical point of view, can be considered as zero.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Blast Furnaces (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)
  • Pressure Vessels And Lids Thereof (AREA)
  • Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
  • Crystals, And After-Treatments Of Crystals (AREA)
  • Stacking Of Articles And Auxiliary Devices (AREA)
  • Coating With Molten Metal (AREA)
  • Muffle Furnaces And Rotary Kilns (AREA)
  • Furnace Charging Or Discharging (AREA)
  • General Preparation And Processing Of Foods (AREA)
  • Food Preservation Except Freezing, Refrigeration, And Drying (AREA)
  • Polyurethanes Or Polyureas (AREA)
  • Polyesters Or Polycarbonates (AREA)
  • Forklifts And Lifting Vehicles (AREA)
  • Fluid-Damping Devices (AREA)
  • Heat Treatment Of Articles (AREA)
EP82101943A 1981-04-03 1982-03-11 Procédé pour actionner une goulotte oscillante dans une enceinte sous pression, dispositif pour la mise en oeuvre de ce procédé et installation de chargement d'un four à cuve équipé d'un tel dispositif Expired EP0062769B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT82101943T ATE11571T1 (de) 1981-04-03 1982-03-11 Verfahren zur betaetigung einer oszillierenden verteilerschurre in einem unter druck stehenden behaelter, vorrichtung zur durchfuehrung dieses verfahrens und mit dieser vorrichtung versehene schachtofenbeschickungsanlage.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
LU83280A LU83280A1 (fr) 1981-04-03 1981-04-03 Procede pour actionner une goulotte oscillante dans une enceinte sous pression,dispositif pour la mise en oeuvre de ce procede et installation de chargement d'un four a cuve equipe d'un tel dispositif
LU83280 1981-04-03

Publications (2)

Publication Number Publication Date
EP0062769A1 EP0062769A1 (fr) 1982-10-20
EP0062769B1 true EP0062769B1 (fr) 1985-01-30

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EP82101943A Expired EP0062769B1 (fr) 1981-04-03 1982-03-11 Procédé pour actionner une goulotte oscillante dans une enceinte sous pression, dispositif pour la mise en oeuvre de ce procédé et installation de chargement d'un four à cuve équipé d'un tel dispositif

Country Status (17)

Country Link
US (2) US4525120A (uk)
EP (1) EP0062769B1 (uk)
JP (1) JPS57166472A (uk)
KR (1) KR890004519B1 (uk)
AT (1) ATE11571T1 (uk)
AU (1) AU546453B2 (uk)
BR (1) BR8201995A (uk)
CA (1) CA1173241A (uk)
CS (1) CS272201B2 (uk)
DE (1) DE3262092D1 (uk)
ES (2) ES8307020A1 (uk)
IN (1) IN157547B (uk)
LU (1) LU83280A1 (uk)
PL (1) PL136311B1 (uk)
SU (2) SU1134121A3 (uk)
UA (2) UA7061A1 (uk)
ZA (1) ZA821570B (uk)

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LU84303A1 (fr) * 1982-07-28 1984-03-22 Wurth Paul Sa Procede et dispositif de commande du mouvement d'une goulotte oscillante et application a une installation de chargement d'un four a cuve
LU85078A1 (fr) * 1983-11-07 1985-07-17 Wurth Paul Sa Dispositif d'entrainement d'une goulotte oscillante
DE3425676C2 (de) * 1984-06-19 1986-10-09 Stopinc Ag, Baar Vorrichtung zum Auswechseln eines Gießrohres
LU85899A1 (fr) * 1985-05-14 1986-12-05 Wurth Paul Dispositif de manutention d'une goulotte de distribution d'un four a cuve
LU86822A1 (fr) * 1987-03-24 1988-11-17 Wurth Paul Sa Procede et dispositif de correction de la trajectoire de chute dans une installation de chargement d'un four a cuve
AT394631B (de) * 1988-07-25 1992-05-25 Wurth Paul Sa Handhabungsvorrichtung fuer eine verteilerschurre eines schachtofens, und an diese vorrichtung angepasster antriebsmechanismus
LU90319B1 (fr) * 1998-11-16 2000-07-18 Wurth Paul Sa Dispositif de r-partition de mati-res en vrac avec goulotte tournante - angle d'inclinaison variable
LU90642B1 (fr) * 2000-09-20 2002-03-21 Wurth Paul Sa Dispositif de r-partition de mati-res en vrac avec goulotte rotative - angle d'inclinaison
US6578694B2 (en) * 2001-02-16 2003-06-17 Mcneilus Truck And Manufacturing, Inc. Discharge chute control system
KR100985372B1 (ko) * 2003-07-09 2010-10-04 주식회사 포스코 용광로 장입 분배슈트의 구동장치
CN100422348C (zh) * 2004-01-18 2008-10-01 石家庄三环阀门股份有限公司 双杠杆四吊点同步驱动的高炉炉顶溜槽布料器
EP1662009A1 (en) * 2004-11-26 2006-05-31 VAI Industries (UK) Ltd. Device for distributing material into a furnace
US7228956B2 (en) * 2005-01-10 2007-06-12 Benetech, Inc. Bulk material precision transfer chute apparatus
LU91176B1 (en) * 2005-06-15 2006-12-18 Wurth Paul Sa Charging device and distribution chute for a shaftfurnace
KR100948929B1 (ko) * 2007-12-24 2010-03-23 주식회사 포스코 환원로 및 이를 포함하는 용철 제조 장치
LU91413B1 (en) * 2008-02-01 2009-08-03 Wurth Paul Sa Charge distribution apparatus
LU91565B1 (en) * 2009-05-07 2010-11-08 Wurth Paul Sa A shaft furnace charging installation having a drive mechanism for a distribution chute.
JP5547742B2 (ja) * 2009-10-09 2014-07-16 新日鉄住金エンジニアリング株式会社 装入装置
GB2475884A (en) * 2009-12-04 2011-06-08 Siemens Vai Metals Tech Sas A furnace chute with a plurality of vanes on the inner surface
LU91653B1 (en) 2010-02-19 2011-08-22 Wurth Paul Sa Distribution chute for a charging device of a metallurgical reactor
LU91683B1 (en) 2010-04-22 2011-10-24 Wurth Paul Sa Device for distributing bulk material with a distribution spout supported by a cardan suspension
LU91822B1 (fr) * 2011-06-08 2012-12-10 Wurth Paul Sa Ensemble à trappe et clapet pour une installation de chargement d'un four à cuve
CN103114163B (zh) * 2013-02-22 2014-09-10 中冶南方工程技术有限公司 带空心环的炉顶布料器及布料方法
LU92494B1 (fr) * 2014-07-07 2016-01-08 Wurth Paul Sa Dispositif de blocage de la goulotte sur les extrémités des tourillons, dans une installation de chargement d'un four à cuve
CN106148620B (zh) * 2015-04-16 2018-03-20 僧全松 一种锥筒摇床布料器
CN110362029A (zh) * 2019-06-06 2019-10-22 新兴铸管股份有限公司 一种高炉矿槽料仓快速定位自动上料的方法
US11136207B2 (en) 2019-08-20 2021-10-05 Benetech, Inc. Enclosure and dust capture and reclamation system and assembly for a traditional roller conveyor
US11273994B2 (en) 2020-02-21 2022-03-15 Benetech, Inc. Bulk material precision in field belt conveyor loading apparatus
CN112658250B (zh) * 2020-12-04 2022-08-26 广州达运医疗科技有限公司 一种用于粉末冶金零件的烧结装置
US11919719B2 (en) 2021-05-13 2024-03-05 Benetech, Inc. Drop and slide out idler assembly

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Also Published As

Publication number Publication date
UA7054A1 (uk) 1995-03-31
KR830010201A (ko) 1983-12-26
CS272201B2 (en) 1991-01-15
AU8164082A (en) 1982-10-07
AU546453B2 (en) 1985-09-05
ES510802A0 (es) 1983-07-01
JPH0357395B2 (uk) 1991-08-30
BR8201995A (pt) 1983-03-15
IN157547B (uk) 1986-04-19
LU83280A1 (fr) 1983-03-24
SU1134121A3 (ru) 1985-01-07
US4547116A (en) 1985-10-15
ES8403971A1 (es) 1984-04-16
EP0062769A1 (fr) 1982-10-20
UA7061A1 (uk) 1995-03-31
SU1170973A3 (ru) 1985-07-30
JPS57166472A (en) 1982-10-13
CS215982A2 (en) 1989-03-14
ES521490A0 (es) 1984-04-16
PL136311B1 (en) 1986-02-28
PL235792A1 (uk) 1982-11-08
KR890004519B1 (ko) 1989-11-10
CA1173241A (en) 1984-08-28
DE3262092D1 (en) 1985-03-14
ZA821570B (en) 1983-01-26
ES8307020A1 (es) 1983-07-01
US4525120A (en) 1985-06-25
ATE11571T1 (de) 1985-02-15

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