JP2015101744A - Impeller exchange device for mechanical agitation type desulfurization facility - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an impeller exchange device capable of exchanging an impeller disposed on a mechanical agitation type desulfurization facility with a novel impeller with correct centering.SOLUTION: The impeller exchange device comprises: a base 2 capable of being disposed directly below a rotation drive shaft; a first slider 3 disposed on the base 2 and capable of moving in front and rear directions of the base 2; and a second slider 4 disposed on the first slider 3 and capable of moving in a direction crossing the direction where the first slider 3 moves. The second slider 4 comprises: a top plate 4a whose top surface is an impeller mount surface; and at least four guide plates 4b disposed on the top surface of the top plate 4a in a standing posture, and defining and forming a novel impeller disposing area M of a novel impeller to be exchanged in the inside by cooperation with the top plate. The guide plates 4b comprise an inclination wall 5 for gradually expanding an area of the disposing area M toward its top part opening end.

Description

  The present invention relates to an impeller exchanging apparatus for exchanging an impeller attached to a mechanical stirring desulfurization facility with a new impeller.

  As the hot metal desulfurization method, conventionally, an injection method in which a lance is immersed in the hot metal and a desulfurizing agent is blown through the lance, or a mechanical stirring type in which the impeller is immersed in the hot metal and the hot metal and the desulfurizing agent are mixed and stirred by rotating the impeller. Desulfurization methods are known.

  Among them, the mechanical stirring type desulfurization method in which hot metal desulfurization processing is performed using an impeller adopts an equipment configuration in which the impeller itself is moved together with a drive source along a processing line, thereby allowing the hot metal contained in a plurality of holding containers. Can be sequentially agitated, and there is an advantage that operation with good agitation efficiency can be performed while reducing the cost of the equipment.

  By the way, although the impeller immersed in the hot metal is covered with refractory material, it is inevitable to cause melting or omission, and it is essential to replace the impeller itself regularly. Since the desulfurization process must be interrupted during the replacement, it is a problem how to perform such replacement in a short time.

  As a prior art regarding this point, for example, Patent Document 1 discloses that a carriage that can travel on a desulfurization treatment line has a plurality of impeller containers configured to be movable up and down by a cylinder device, and for operating the cylinder device. There has been proposed an impeller exchanging device in which an actuating device and a drive source for running a carriage via a power transmission mechanism are arranged.

  Further, in Patent Document 2, a plurality of impeller containers supported by a cylinder device so as to be movable up and down are provided on a carriage that can run on a hot metal desulfurization treatment line, and the impeller and impeller swivel main shaft in the container are provided. Removable with a concave-convex fitting flange joint, while an impeller centering device consisting of a movable turntable is provided in the impeller container, and the fastening bolt of the flange joint is used as a rod that penetrates the bolt hole for each connection The rod is elastically supported by a compression spring arranged on the flange joint, and a retaining means is provided at the bottom of the rod, and the connecting rod is pushed down between the cylinder holder and the compression spring protruding from the impeller turning spindle. An impeller exchanging device provided with a hydraulic or air cylinder is disclosed in Patent Document 3 as an impeller on a travelable exchanging carriage. What consists of the structure which installed the raising / lowering support | pillar to which the support arm was fixed is further provided in patent document 4, The 1st turning means supported by the raising / lowering means so that raising / lowering is possible, and the 1st rotation drive means can be turned, A slide member mounted on the first swivelable means and horizontally movable by the reciprocating means, and a plurality of slide members are placed on the slide member around the ship shaft of the first swivel member, and each of the second rotation drive means. The second swivel member is provided with a bifurcated support that supports a support column and an impeller provided on an upper portion of the support column at the center of rotation of the second swing member. Each of these structures has been proposed.

Japanese Utility Model Publication No. 57-44158 Japanese Utility Model Publication No. 5-37949 JP 2003-185358 A JP 2010-116585 A

  However, each of the conventional devices found in the above-mentioned Patent Documents 1 to 4 has a problem that the device itself is large and the equipment cost is inevitably increased, and there is a problem that time is required for centering. When applying to other facilities, it was difficult to secure installation space.

  SUMMARY OF THE INVENTION An object of the present invention is to propose an impeller exchange device for a mechanical stirring desulfurization facility capable of simplifying and downsizing the device structure and exchanging the impeller in a short time with accurate centering.

  The present invention relates to an impeller exchanging device for exchanging an impeller detachably held on a rotary drive shaft of a mechanical agitation-type desulfurization equipment via a flange joint with a new impeller, which is directly below the rotary drive shaft. A displaceable base, a first slider placed on the base and movable in front and back thereof, and a direction placed on the first slider and intersecting the moving direction of the first slider A second slider that is movable on the top plate, and the second slider is disposed in a standing posture on the top surface of the top plate, the top plate having the top surface of the impeller as a mounting surface, and cooperates with the top plate. It consists of at least four guide plates that act to define the installation area of the new impeller to be exchanged inside, and the guide plate gradually expands the area of the installation area toward its upper open end An impeller changer mechanical stirring type desulfurization equipment characterized by having a inclined wall.

  In the impeller exchanging device, the impeller is tilted to at least one of the front and rear and the left and right while the impeller is installed in the installation area on the second slider, so that the impeller is level with respect to the shaft end surface of the rotary drive shaft. It is preferable to provide a tilting means for adjusting the angle.

  Further, in the above impeller exchange device, the guide plate has a window hole with the top plate of the second slider as the lowermost side, and the base rotates the mechanical stirring type desulfurization equipment. It is preferable as a specific means for solving the problems of the present invention to have a moving mechanism that can move directly below the drive shaft.

  According to the impeller exchanging device of the present invention having the above-described configuration, the main members of the device are basically a base that can be disposed directly below the rotary drive shaft, and a first slider that is placed on the base. And the second slider mounted on the first slider, the device structure can be simplified and made compact and applied to existing equipment. However, it is easy to secure the installation space.

  Further, the top plate of the second slider is provided with at least four guide plates that define the installation area of the impeller, and the area of the installation area is gradually enlarged toward the upper open end of the guide plate. Since the inclined wall is formed, the inclined wall serves as a guide, making it easy to introduce a new impeller into the installation area of the exchange device (reduction of labor). Moreover, the impeller can be easily installed by simply placing the impeller in the installation area. The two sliders are positioned accurately.

  Further, by moving the first slider on the base and moving the second slider on the first slider, the misalignment of the impeller shaft center with respect to the rotational drive shaft center can be easily adjusted. By tilting the second slider, it is possible to easily adjust the levelness (opening) with respect to the shaft end surface of the rotary drive shaft, and the time for centering can be shortened.

  Further, according to the impeller replacement device of the present invention having the above-described configuration, the guide plate is provided with the window hole having the top of the second slider as the lowermost side. A taper liner for adjusting the level can be inserted in between.

It is the figure which showed typically the embodiment of the impeller exchange apparatus according to this invention about the plane. It is the figure which showed the front of the impeller exchange apparatus shown in FIG. It is the figure which showed the side surface of the impeller exchange difference shown in FIG. It is the figure which showed typically the hot metal desulfurization processing line. It is the figure which showed the external appearance perspective view of the taper liner.

  FIG. 1 is a diagram schematically showing an embodiment of an impeller exchanging device according to the present invention with respect to the front thereof, and FIG. 2 is a diagram showing a plane of the impeller exchanging device shown in FIG. These are the figures which showed the side surface of the impeller exchange apparatus shown in FIG. FIG. 4 is a view showing a state in which the impeller exchange device shown in FIGS. 1 to 3 is arranged in a hot metal desulfurization treatment line.

  1 to 4 is a new impeller to be replaced in the present invention. The impeller 1 has four rotary blades 1b at the lower end of a shaft 1a, and a flange joint 1c that can be connected to the rotary drive shaft of a mechanical stirring desulfurization facility by bolts and nuts (not shown) at the upper end. It consists of what has. In addition, the impeller 1 illustrated here is an example, and is not limited to the one provided with the four rotating blades 1b.

  Reference numeral 2 denotes a base constituting the impeller exchange device. The base 2 can be a fixed type in which the installation location is fixed when the mechanical stirring type desulfurization equipment itself is capable of traveling. However, when the mechanical stirring type desulfurization equipment is fixed type, It is also possible to apply a moving structure that can move along a pre-laid track or the like, and in any case, it can be positioned directly below the rotational drive shaft of the mechanical stirring desulfurization equipment. (In the case of a fixed type in which the installation location is constant, it is installed when the base 2 can be positioned directly below the mechanical stirring type desulfurization equipment by moving the mechanical stirring type desulfurization equipment).

  Reference numeral 3 denotes a first slider placed on the base 2. The first slider 3 is a track 3a laid on the upper surface of the base 2 in the front-rear direction (X direction (see FIG. 3)), and rolls along the track 3a to move the first slider 3 back and forth. It has the wheel 3b to move. In addition, although the case where the track 3a and the wheel 3b are applied is shown here as the moving means of the first slider 3, other moving means such as a moving means constituted by a tough roller, a linear guide or the like may be applied. However, the present invention is not limited to the illustrated one.

  Reference numeral 4 denotes a second slider placed on the first slider 3. The second slider 4 includes a top plate 4a on which the new impeller 1 is placed, and an upright position on the top surface of the top plate 4a. The second slider 4 cooperates with the top plate 4a to place the impeller 1 inside. The first slider is composed of a guide plate 4b that defines M (which is kept to such an extent that a very slight gap is formed between the guide plate 4b and the rotary blade 1b of the impeller 1). A track 4c provided in the direction (Y direction (see FIG. 1)) intersecting the track 3a on the upper surface of 3 and a wheel 4d that rolls along the track 4c and moves the second slider 4 forward and backward. Have. As for the moving means of the second slider 4, like the first slider 3, the moving means comprising the track 4 c and the wheels 4 d has been shown as an example. However, other moving means can be applied and shown in the drawing. There is no limit. The first slider 3 may be movable in the Y direction (left and right direction), and the second slider 4 may be movable in the direction orthogonal to the first slider 3, that is, the X direction (front and rear direction).

  The installation area M defined by the guide plate 4b is a place where a new impeller 1 to be replaced is arranged. When the new impeller 1 is arranged in the installation area M, the impeller 1 The second slider 4 is positioned in a state where the center of the shaft and the center of the installation area M are substantially coincident with each other. The guide plate 4b may be slidable back and forth on the top plate 4a, so that it is possible to easily cope with the case where the impellers 1 having different sizes are used.

  Furthermore, 5 is an inclined wall provided on the inner surface of the guide plate 4b. The inclined wall 5 gradually expands the area of the installation area M of the impeller 1 in a tapered shape toward the upper open end. By providing the inclined wall 5, for example, the new impeller 1 can be used as a crane or the like. The inclined wall 5 serves as a guide and is easy to introduce the impeller 1 into the installation area M. In addition, although the guide plate 4b was shown about the case where four were provided at 90 degree intervals centering on the axial center of the impeller 1, the number of installation of a guide plate 4b, a width dimension, etc. are the number of the stirring blades 1b of the impeller 1 It changes suitably according to etc. Here, the area of the installation area M refers to the area indicated by oblique lines in FIG.

  Reference numeral 6 denotes a plurality of tilting means (manual jacks or the like) provided between the top plate 4a of the second slider 4 and the receiving plate 4e that holds the top plate 4a. This tilting means 6 can move the rod 6a up and down to tilt the top plate 4a appropriately back and forth and right and left. The tilting means 6 is a shaft end of the shaft 1a of the impeller 1 (actually, the joint end face of the flange joint 1c). ) Level (levelness relative to the shaft end of the rotary drive shaft of the mechanical stirring type desulfurization equipment).

  Further, 7 is a window hole provided with a notch in the lower part of the guide plate 4b and having the top plate 4a of the second slider 4 as the lowermost side. The level of the shaft end of the shaft 1a of the impeller 1 can be basically adjusted by the tilting means 6, but between the impeller 1 and the top plate 4a through the window hole 7, as shown in FIG. It is also possible to adjust the level by inserting a taper liner as required.

  As shown in FIG. 4 above, the impeller exchanging device having the above configuration is arranged in a state where the hot metal holding container in which the hot metal is accommodated is arranged side by side with the hot metal holding container. In the area, an impeller storage place for temporarily storing the used impeller 1 ′ is provided, thereby enabling efficient replacement of the impeller 1.

  Reference numeral 8 (see FIG. 4) is a track provided along the desulfurization treatment line, and 9 is a mechanical stirring type desulfurization facility that can travel along the track 8.

  The mechanical stirring desulfurization equipment 9 includes a movable carriage 9a, a vertically long frame body 9b installed on the movable carriage 9a, and an inner frame 9c that can be moved up and down by means such as a winch W inside the frame body 9b. A drive source 9d including a speed reducer is disposed in the inner frame 9c.

  The impeller 1 is suspended and held via a flange joint 9f on the rotational drive shaft 9e of the drive source 9d, and the impeller 1 can be rotated by rotating the rotational drive shaft 9e by the drive source 9d.

  Reference numeral 10 denotes a hot metal holding container disposed along the track 8 below the track 8.

  The desulfurization treatment of the hot metal held in the hot metal holding container 10 is performed by appropriately moving the mechanical stirring type desulfurization equipment 9 by the movable carriage 9a to position the impeller 1 directly above the hot metal holding container 10, and then setting the inner frame 9c to the frame. The impeller 1 is lowered along the body 9b and immersed in the molten metal in the hot metal holding container 9, and the impeller 1 is maintained while rotating the impeller 1 (rotary stirring with a desulfurizing agent added).

  After finishing the hot metal desulfurization process, the impeller 1 stops rotating, the inner frame 9c is raised, and the impeller 1 is temporarily stored in the frame body 9b. Then, the mechanical stirring type desulfurization equipment 9 is moved by the moving carriage 9a, and further, the hot metal desulfurization treatment is performed by positioning the mechanical stirring type desulfurization equipment 9 just above another hot metal holding container 10 and rotating the impeller 1 in the same manner as described above. .

  In exchanging the impeller 1, first, a new impeller 1 to be exchanged is placed in advance in the installation area M of the impeller exchanging device using a crane or the like, and the impeller 1 is used using the tilting means 6 or the taper liner. Is adjusted (actually, the level of the upper end surface of the flange joint 1 c), while the mechanical stirring type desulfurization device 9 is moved to the impeller depot 11.

  When the mechanical stirring type desulfurization equipment 9 reaches the impeller depot 11, the inner frame 9 c is lowered to the lowermost end of the frame body 9 b and the used impeller 1 ′ is placed on the impeller depot 11 and the flange joints 9 f and 1 c are mutually connected. The connecting bolt is removed, and the impeller 1 'is separated from the rotary drive shaft 9e.

  After separating the used impeller 1 'from the rotary drive shaft 9e, the mechanical stirring type desulfurization equipment 9 is moved to a position directly below the impeller changer and the inner frame 9c is lowered to attach the flange joint 9f of the rotary drive shaft 9e. Then, the flanged joint 1c of the new impeller 1 is brought close to the flanged joint 1c (a distance at which the fastening bolt reaches both the flanged joints 9f and 1c).

  Then, the first slider 3 and the second slider 4 are appropriately moved to adjust (centering) the misalignment between the axis of the impeller 1 and the axis of the rotary drive shaft 9e (if necessary, the impeller 1 Level adjustment), the flange joint 9f is rotated to align the bolt hole of the flange joint 9f with the bolt hole of the flange joint 1c of the impeller 1, and the flange joint 9f and the impeller 1 are further aligned. The flange joints 1c are brought into contact with each other and the flange joints are connected to each other with fastening bolts. The level of the impeller 1 can be confirmed using a level, and the misalignment of the shaft center can be confirmed using a dial gauge.

  In the impeller exchanging device of the present invention, a crane or the like is used when placing the new impeller 1 in the installing region M of the exchanging device. However, the guide plate 4b is formed with an inclined wall 5, and the installing region M is Since the charging port is enlarged in a tapered shape, there is an advantage that the impeller 1 can be easily arranged in the installation area M.

  In addition, since the misalignment can be adjusted by moving the first slider 3 and the second slider 4 respectively, and the horizontality can be adjusted by appropriately tilting the second slider 4, Accurate centering can be performed in a short time.

  When the base 2 of the exchange device is fixed and installed at a fixed location, the center of the installation area M is preferably located on a line through which the axis of the rotary drive shaft 9e passes. This is because at this time, it is only necessary to move at least one of the first slider 3 and the second slider 4 very slightly when centering, and the centering operation becomes easier.

  The first slider 3 and the second slider 4 can be moved using a power source, but may be moved manually. In this case, the structure of the apparatus is further simplified and made compact. It is possible to reduce the equipment cost.

  When the first slider 3 and the second slider 4 are moved manually, a moving mechanism is configured by applying a screw rod and a nut that engages with the screw rod, and either the screw rod or the nut is controlled by the handle. The first slider 3 and the second slider 4 are moved by rotating one of them. In this case, by integrating the direction of the handle in one direction with a miter gear or the like, it is possible to ensure safety and simplify the work. In particular, the centering of the impeller 1 requires adjustment of several millimeters. However, in a moving mechanism employing screw rods and nuts, adjustments in millimeters can be made by appropriately selecting the lead (corner) of the screw rod. Yes.

  In the present invention, the impeller exchange device is fixed and the mechanical stirring type desulfurization equipment 9 is movable. However, the mechanical stirring type desulfurization equipment 9 is fixed and the hot metal desulfurization process is performed in a fixed place. In this case, the base 2 may be provided with a moving mechanism so that the exchange device itself can be moved, and this point is not limited.

  As a result of investigating the time required for the centering operation of the impeller, it took about 21 minutes in the past, but when the exchange device according to the present invention was applied, the centering could be completed in about 2 minutes.

  According to the present invention, it is possible to provide an impeller exchanging device capable of simplifying the structure and reducing the size and exchanging the impeller in a short time with accurate centering.

DESCRIPTION OF SYMBOLS 1 Impeller 1a Shaft 1b Rotary blade 1c Flange joint 2 Base 3 First slider 3a Track 3b Wheel 4 Second slider 4a Top plate 4b Guide plate 4c Track 4d Wheel 5 Inclined wall 6 Tilt means 6a Rod 7 Window hole 8 Track 9 Mechanical stirring desulfurization equipment 9a Moving carriage 9b Frame 9c Inner frame 9d Drive source 9e Rotation drive shaft 9f Flange joint 10 Hot metal holding container 11 Impeller place 12 Hot metal charging device

Claims (4)

An impeller exchanging device for exchanging an impeller that is detachably suspended from a rotary drive shaft of a mechanical stirring type desulfurization equipment via a flange joint with a new impeller,
A base that can be disposed directly under the rotation drive shaft, a first slider that is placed on the base and movable in front and rear of the base, and a first slider that is placed on the first slider and that is placed on the first slider; A second slider that can move in a direction that intersects and a direction that intersects,
The second slider has a top plate whose upper surface is the mounting surface of the impeller, and a new impeller that is disposed on the top surface of the top plate in a standing posture and should be exchanged inside the top plate in cooperation with the top plate. Consisting of at least four guide plates that demarcate the installation area of
The impeller exchange device for a mechanical stirring desulfurization facility, wherein the guide plate has an inclined wall that gradually expands an area of the installation area toward an upper open end of the guide plate.   The said 2nd slider has a tilting means which tilts itself to at least one of the front and back, and right and left with the impeller installed in the installation space, and adjusts the level of the impeller. The impeller exchange device for the described mechanical stirring desulfurization equipment.   The impeller exchange device for a mechanical stirring desulfurization facility according to claim 1 or 2, wherein the guide plate has a window hole having a top plate of the second slider as a lowermost side.   The impeller of the mechanical stirring desulfurization equipment according to any one of claims 1 to 3, wherein the base has a moving mechanism that can move toward a position directly below a rotation drive shaft of the mechanical stirring desulfurization equipment. Exchange equipment.

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