CZ9904036A3 - Device for separation of loose material containing rotary trough with variable angle of inclination - Google Patents

Abstract

In the present invention, there is disclosed a device for the distribution of bulk material comprises a first rotor (20) and a second rotor (30). The first rotor (20) carries two suspension bearings (44, 46) on which a distributing chute (42) is suspended in such a manner that it can be tilted in substantially about its horizontal axis. Further, said first rotor (20) carries a toothed gearing mechanism (52) comprising a driving shaft (54) and an output shaft (60). Said driving shaft (54) is provided with a pinion gear (56) engaging with a ring-shaped toothed wheel (58) disposed on a second shaft (30). Said toothed gearing mechanism (52) output shaft (60) is disposed parallel to the chute (42) pivoting axis, and is coupled with two cranks (64, 66). The chute (42) is provided at the level of each two suspension bearings (44, 46) with two reciprocating levers (48, 50). Each of these reciprocating levers (48, 50) is symmetrically coupled with one of the two cranks (64, 66) of the toothed gearing mechanism (52) by means of a connecting bar (68, 70).

Description

Apparatus for distributing bulk material comprising a rotating trough with a variable angle of inclination

Technical field

In particular, the invention relates to a device for distributing bulk material comprising a chute, a first rotor having a substantially perpendicular axis of rotation on which the chute is pivoted about substantially

F a horizontal axis of rotation, and a second rotor with an axis of rotation substantially coaxial with the axis of the first rotor.

BACKGROUND OF THE INVENTION

Such bulk material distributing and spreading devices are used, for example, in charging furnaces, in particular blast furnaces. The swiveling and tilting trough ensures the distribution of the loaded material over. the charge surface inside the blast furnace.

In the apparatus described in the preamble, the first rotor rotates the chute substantially about a vertical axis. The second rotor interacts with the chute to stabilize its inclination angle with the vertical. For this purpose, the second rotor is connected to the trough by a tilting mechanism converting the angular displacement changes between the two rotors into angle changes; the inclination of the trough in its vertical tilt plane.

The tilting mechanism, generating the torque * required to tilt the trough around its horizontal tilt axis and transmitting torque to the trough, has already been proposed in many different variants.

U.S. Pat. No. 3,786,868 discloses a device of the type described in the introduction in which the connecting rod is; located in the tilt plane of the trough, connected at one end thereof to the trailing surface of the trough.

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The other end of the tie rod is guided in a sinusoidal guide track on the second rotor. ί i

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US-PS 3,814,403 describes and shows a device of the type mentioned in the introduction, in which the second rotor is provided with an annular gear. This annular gear k

drives a worm by means of an interposed first pinion, which, by means of an interposed second pinion, acts on a sector gear mounted on the side of the trunnion pivot.

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U.S. Pat. No. 4,368,813 discloses an apparatus of the kind described in the introduction in which the rotor also comprises an annular gear. The first rotor carries the worm drive. The drive shaft of this worm drive is provided with a pinion which engages the ring gear on the second rotor. The output shaft is parallel to the trough axis and is equipped with a crank. Connecting Rod, i

located in the tilt plane of the trough, is connected at one end thereof to the trailing surface of the trough, the other end of the rod being connected to the handle. |

US-PS 4,941,792 discloses two devices of the type described in the introduction. A first embodiment of the device J uses the tilting levers carried by the first rotor so that it can be pivoted in the tilt plane of the trough. This tilt lever is connected to the second rotor by a tie rod provided with a mallet-pan connection. The trough is provided with two lateral pivot pins, each provided; crank. The tilting connecting rod is connected by a forked connecting rod with two cranks on the trough. In a second embodiment of the device, the second rotor carries an annular segmented gear that cooperates with a sector gear coupled to a side suspension pin on the trough. and

US-PS 5 002 described in the introduction,

806 describes and shows a device of the type in which the second rotor is connected to the crank

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SUMMARY OF THE INVENTION It is an object of the present invention to provide a simple and compact device which allows the transfer of considerable tilting forces to a rotating trough.

SUMMARY OF THE INVENTION

This object is solved by a device for distributing bulk material whose characteristics are contained in Patent demanding ^ ^u! ·

The bulk material distribution device comprises a first rotor and a second rotor having a common and substantially vertical axis of rotation. The first rotor carries two suspension bearings on which the distributor trough is suspended so that it can tilt about a substantially horizontal tilting axis. The device also includes a gear mechanism which is also supported by the first rotor. The gear mechanism comprises a drive shaft and a PTO. The drive shaft is provided with a pinion which engages the annular gear of the second shaft. The output shaft of the gear mechanism is parallel to the axis of tilting of the trough. The essence of the invention is that the output shaft is provided with two cranks, while the trough is connected at the level of each of the suspension bearings to the pivot lever. Each of these two rocker levers is symmetrically connected by means of a connecting rod to one of the two cranks. The difference between the angular rotational speed of the first rotor and the second rotor causes the pinion of the gear transmission to rotate about its axis and thus also to rotate the two cranks carried by the output shaft of the gear transmission. The two cranks then symmetrically transmit the pivoting torque to the trough by means of an interposed pair of tie rods and levers. This design makes it possible to transfer large tilting moments to the swivel trough with a simple and compact device.

and

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Even the device usually includes a fixed placed so that it is charged loose. The first rotor then preferably comprises t

surrounding the vertical charging tube,

Such a distribution vertical charging tube material has fallen into the trough a vertical suspension sleeve, and is provided with a horizontal flange at its lower end, and a trough suspension bearings located on the flange on both sides of the suspension sleeve are supported on the flange, tract. >

and

The gear mechanism is preferably symmetrical with respect to the plane of symmetry of the two suspension bearings, and in a further preferred embodiment of the invention comprises a worm gear or equivalent gear system having a drive shaft and an output shaft.

- X l shaft that are perpendicular to each other. The worm gear has the advantage that it can be easily designed to be self-locking so that the torque caused by the weight of the trough cannot be transmitted to the second rotor. Ϊ í

and

AND

If the device according to the invention is installed at the most, according to another preferred embodiment of the invention, it is provided with an outer jacket having a fixed shielding screen at its lower end. The orifice is provided with a circular opening, to the periphery of which the flange of the first rotor is attached. Around the orifice is a circular gas injection duct to allow ί

inject cooling gas into the hollow space around the flange. The cooling system of the device according to the invention may also comprise f

a cooling circuit located in the annular space between the first rotor and a fixed vertical charging tube used to pour bulk material into the trough. her

BRIEF DESCRIPTION OF THE DRAWINGS ί

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 shows a vertical axial section through a bulk material distribution apparatus; and FIG.

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Fig. 2 is a horizontal cross-sectional view taken along line 2-2 of Fig. 1;

DETAILED DESCRIPTION OF THE INVENTION

In particular, the bulk material distribution apparatus 10 shown in FIGS. 1 and 2 is designed as part of a feed furnace for a shaft furnace, for example a blast furnace, shown schematically by its upper end 12. i.

The apparatus 10 comprises an outer shell 14 which is mounted sealed and impermeable to the upper end 12 of the shaft or blast furnace. This outer casing 14 is provided with a fixed charging tube 16 which is substantially coaxial with the vertical axis 18 of the blast furnace. In the outer shell 14, the first rotor 20 is suspended by means of a large diameter roller ring 22.

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The first rotor 20 comprises a vertical suspension sleeve 24 which surrounds the fixed charging tube 16 and is provided with a horizontal flange 26 at its lower end. A second large diameter roller ring 28 is used to hang the second rotor 30 in the outer casing 14. the second rotor 30 surrounds the first rotor 20 and its axis of rotation is coaxial with the axis of rotation of the first rotor 20.

The two rotors 20, 30 rotate about a common pivot axis and are driven by the drive train 32 shown as a whole in Figure 1. This drive train 32 includes a first pinion 34 that engages an annular gear of the first rotor 20, and a second a pinion 38 engaging the annular gear 40 of the second rotor 30.

By means of two motors 41 and a differential mechanism 43, which i

mounted on the outside of the outer shell 14, the drive train 32 is adapted to drive two rotors 20. 30. either perfectly synchronized rotational speeds or with different rotational speeds.

AND

The apparatus 10 according to the invention is further provided with a chute 42 for distributing bulk material supplied by the charging tube 16. The chute 42 is suspended on the first rotor by means of two suspension bearings 44. 46 such that it can be rotated about a substantially horizontal axis. The hinge bearings 44, 46 are located on the flange 26 of the first rotor 20 on both sides of its hinge sleeve 24. At the level of each hinge bearing 44. 46, the chute 42 is provided with a rocker lever 48.

protruding up over the hinge bearings 44, 46. '!

and

A flange 26 of the first rotor 20 carries a gear mechanism 52. The gear mechanism 52 comprises a drive shaft 54 which is parallel to the axis of rotation of the two rotors 20 and is provided with a pinion 56 disposed with the annular gear 58 of the second rotor 30. The toothed gear assembly 52 also includes an output shaft 60 that is parallel to the pivot axis of the chute 42 and has two free ends each having a crank 64, 66. The drive shaft 54 is coupled to the output shaft 60 by a worm. over the water 62 to convert the rotation of the vertical drive shaft 54 to the rotation of the horizontal output shaft 60. The two cranks 64, 66 are connected symmetrically by two connecting rods 68, 70 to the rocking levers 48, 50 of the chute 42. rotation of the drive pinion 56 of the gear mechanism 52 causes rotation of the cranks 64, 66, which is then eměňováno by the connecting rods 68, 70 and rocker levers 48, 50 to swing. . In this state, the drive paste 56 rotates when there is a difference between the angular velocities of the first rotor 20 and the second rotor 30. Therefore, it is sufficient to drive the second chute 42 from the first inclined position to the second inclined position. rotor 30 at an angular velocity different from the angular velocity of the first rotor 20. To keep the chute 42 rotating at a constant tilt angle, it is sufficient to drive the second rotor 30 at the same angular velocity as the first rotor 20. It is necessary!

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and

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It should be emphasized that the described device makes it possible, by means of relatively simple and compact devices, to transmit to the chute 42 the forces required to maintain its rotation.

In order to illustrate the entire apparatus, it is still necessary to describe a few important details concerning the protection of the distribution apparatus 10 against the high temperatures occurring in the upper end 12 of the blast furnace. First of all, it should be noted that the horizontal flange 26 of the first rotor 20 is located with little working clearance in a circular opening in the lower aperture 72 of the outer casing 14. The lower aperture 72 is provided with insulation 74 and a closed cooling circuit 76. is provided on its underside with insulation 80 which is separated from the upper metal horizontal flange 26 by a hollow space 82 open sideways. The hollow space 82 is cooled by a gas injected circular duct 84 which is positioned along the edge of the circular opening in the lower aperture 72. The first rotor 20 is preferably cooled by a cooling circuit 86 located in the annular space remaining between the hinge sleeve 24 and the first rotor 20 and a fixed charge The annular space in which the second rotor 30 and the gear mechanism 52 is located is preferably cooled by injecting gas.

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of the material, comprising a substantially vertical axis

Claims (6)

PATENTOVÉ NÁR An apparatus for distributing a bulk chute (42), a first rotor (20) having in rotation and supporting two suspension bearings (44, 46), the chute (42) being hinged in the two suspension bearings (44, 46) rotatably; about a substantially horizontal axis of rotation, a second rotor (30) with a axis of rotation coaxial to the axis of the first rotor (20) provided with an annular gear (58), a gear mechanism (52) supported by the first rotor (20); 52) comprising a drive shaft (54) provided with a pinion (56) engaging the annular gear (58) of the second rotor (30), an output shaft (60) parallel to the axis of rotation of the trough (42) and coupled to the crank assembly; connecting rods for controlling the rotation of the trough (42) when driving the drive shaft (54) by the ring gear (58) of the second rotor (30), characterized in that the output shaft (60) is provided with two cranks, the trough ! (42) is provided at the level of each of its suspension bearings (44, 46) with a rocker lever (48, 50) and each of the two rocker levers (48, 50) is symmetrically connected by means of a connecting rod to one of the two cranks (64) , 66). í ί Apparatus according to claim 1, characterized in that it comprises a vertical charging tube, the first rotor (20) comprising a vertical suspension sleeve surrounding the vertical charging tube and having a horizontal flange at its lower end, suspension bearings (44 The gutters (42) are located on a flange on both sides of the suspension sleeve and the toothed gear (52) is mounted on a horizontal flange between. suspension bearings (44, 46). ! I} Device according to claim 1 or 2, characterized in that the gear mechanism (52) is symmetrical. AND ·· »(! with respect to the symmetry plane of the two suspension bearings (44, 46). Device according to one of Claims 1 to 3, characterized in that the gear mechanism (52) comprises a worm gear (62). Device according to claims 1 to 4, characterized in that its outer casing (14) is provided with a fixed orifice (72) at its lower end, the fixed orifice (72) having a circular opening and the first rotor (20) being provided with at its lower end a flange (26) housed in a circular opening with some play, and a circular duct (84) for receiving cooling gas into the cavity (82) in the flange (26) is arranged around the circular opening. * Device according to one of Claims 1 to 5, characterized in that the fixed charging screw (16) is surrounded by the first rotor (20) and a cooling circuit is arranged in the annular space between the first rotor (20) and the fixed charging pipe (16).