JP4176036B2 - Lower tank or dip tube centering device - Google Patents

Description

The present invention relates to, for example, a lower tank or a dip pipe (hereinafter sometimes simply referred to as a “connecting pipe”) disposed at a lower part of a vacuum tank for degassing in a molten steel secondary refining process performed in a steel mill in an ironworks. It is an object of the present invention to provide a centering device for a lower tank or a dip tube that can speed up the work and reduce the human load and also improve the safety of replacement.

As shown in Patent Document 1, in the molten steel secondary refining process at the steelworks, the lower tank of the vacuum degassing apparatus and the dip tube connected thereto are periodically replaced. In this case, in order to ensure the degree of vacuum of the entire vacuum degassing tank, it is necessary to align the lower tank to be attached and the dip tube and then attach the vacuum tank.
Conventionally, for example, the exchange base for the lower tank is composed of an inner and outer double base, and the inner base is supported by a hanging ring, and this inner base is supported in any horizontal direction using a manually operated jack. So that it can be moved to the center of the vacuum chamber. In addition, the replacement cart has no centering function, and a cart with centering rollers prepared separately is used.

JP-A-8-225825

However, when moving the above pedestal using a jack, if the moving direction is slightly different, it is necessary to adjust by re-jacking or to increase the number of jacks, which requires labor There was a problem.
Furthermore, since the lower tank and the dip tube are heavy objects, it has been a heavy labor for the operator to move them even a short distance.

The present invention has been made in view of such circumstances, and provides a centering device for a lower tank or a dip tube capable of improving work efficiency, reducing human load, and ensuring safety. Objective.

The centering device of the lower tank or dip tube according to claim 1 that meets the above-mentioned purpose is a centering device of a connecting pipe comprising a lower tank or dip tube attached to a lower position of a vacuum tank used for secondary refining,
A carriage movable to a position directly below the mounting flange of the vacuum chamber;
A lifting platform that moves up and down on the carriage by lifting means;
A slide table that is movably mounted on the lifting platform in four directions, front, back, left, and right, and that can hold the connecting pipe attached to a lower position of the vacuum chamber in an upright state;
Lateral movement means capable of moving the slide table in the front-rear and left-right directions.
In this case, the moving distance of the slide table is sufficient if there is a distance of misalignment of the lower tank or the dip tube, for example, about 10 to 20 cm. For example, the present invention is also applied to a case where the inching movement is performed within a range of several millimeters, preferably 4 to 10 mm.

Further, the lower tub or dip tube centering device according to claim 2 is the lower tub or dip tube centering device according to claim 1, wherein the slide table is mounted on the lifting platform, the upper rail, and the upper rail. Four cross slide guides (each having a sliding part that slides and moves the upper and lower rails arranged between the upper and lower rails orthogonal to each other and near each corner of the slide table ( It is attached via an orthogonal linear slide guide.

The lower tank or dip tube centering device according to claim 3 is the lower tub or dip tube centering device according to claim 1 or 2, wherein projecting pieces are provided on the front, rear, left and right of the lower portion of the slide table. The lateral movement means includes four hydraulic cylinders that respectively press the protruding pieces.

The lower tank or dip tube centering device according to claim 4 is the lower tub or dip tube centering device according to claims 1 to 3, wherein the lifting platform is provided with a work stage, The moving means is operated by an operation switch.

The centering device for the lower tub or dip tube according to any one of claims 1 to 4, wherein the slide table on which the connecting pipe made of the lower tub or dip tube is mounted or can be moved back and forth and left and right by the lateral movement means. Therefore, when the position of the connecting pipe is not a regular position, the lateral movement means is driven to move the slide table so that the centering can be performed. As a result, it is possible to perform the lateral movement work of the connecting pipe, which has conventionally been performed manually, with a machine, the human load is reduced, and the work efficiency is improved.

In particular, the centering device for the lower tank or dip tube according to claim 2 is characterized in that the slide table is disposed on the lifting platform, the upper rail, the lower rail orthogonal to the upper rail, and the upper and lower rails disposed between the upper and lower rails. Since it is attached via four cross slide guides each having a sliding portion for sliding movement of the rail, the slide table on which the connecting pipe is mounted can be freely moved in the horizontal direction.
Since the four cross slide guides are provided in the vicinity of the corner of the slide table, the stability of the slide table is good.

In particular, in the centering device for the lower tank or dip tube according to claim 3, projecting pieces are provided on the front, rear, left and right of the lower part of the slide table, and the lateral movement means includes four hydraulic cylinders that respectively press the projecting pieces. Since it is provided, the configuration is simple, and the slide table can be moved in any horizontal direction. By closing the four hydraulic cylinders, the movement of the slide table is locked, and the work can be performed safely.

In the centering device for the lower tank or dip tube according to claim 4, since the work stage is provided on the lifting platform, an operator on the work stage can connect the mounted connecting pipe and the vacuum tank. The slide table can be inched by an operation switch for operating the lateral movement means while looking at the lower position.

Next, embodiments of the present invention will be described with reference to the accompanying drawings for understanding of the present invention.
Here, FIG. 1 is a front sectional view of a centering device for a lower tank or dip tube according to an embodiment of the present invention, FIG. 2 is a sectional side view, and FIG. 3 is a perspective view showing an operating state of a slide table, FIG. 4 is an explanatory diagram of the cross slide guide.

As shown in FIGS. 1 and 2, the centering device 10 for the lower tank or the dip tube according to the embodiment of the present invention is movable to a position directly below the mounting flange 12 of the vacuum tank 11 used for secondary refining. A carriage 13, a lifting platform 15 that moves up and down on the carriage 13 by four lifting means 14, and a slide table that is placed on the lifting platform 15 so as to be movable in four directions, front and rear (B direction) and left and right (A direction). 16. These will be described in detail below.

The carriage 13 has wheels 17 on the front, rear, left and right, and can run on the rail 18. A drive source for the carriage 13 may be provided, or another traction or press carriage, or in some cases, manually driven. In addition, it is preferable to provide a brake device in order to temporarily stop after stopping at a predetermined position.
Four lifting means 14 are provided in the vicinity of the four corners of the carriage 13, and a lifting platform 15 is provided at the upper end thereof. The lifting means 14 is an electric cylinder driven by a motor 19 in this embodiment, but may be a hydraulic cylinder. In addition, it has the cover case 20 for protecting the vertical elastic device of the raising / lowering means 14.

On the upper part of the four elevating means 14, there is an elevating stand 15 having a peripheral horizontal connecting member 21 and a plurality of beam members (not shown) for connecting the inside of the rectangular frame-like horizontal connecting member 21 in a cross beam shape. Is provided. A work stage 23 on which an operator can be placed is provided around the lifting platform 15 via an auxiliary member 22.
As shown in FIG. 3, a rectangular slide table 16 is provided on the lifting platform 15 in plan view via four cross slide guides 24 to 27. As shown in FIG. 4, the cross slide guide 24 (same for 25 to 27) is linearly traveling between an upper rail 28 and a lower rail 29 that are orthogonal rails, and between the upper rail 28 and the lower rail 29. It consists of the sliding part 30 provided with the bearing. The four cross slide guides 24 to 27 are provided in the vicinity of the inside of the corner portion of the slide table 16 so that the front, rear, left, and right directions coincide with each other. The upper rail 28 is fixed to the slide table 16, and the lower rail 29 is fixed to the lifting platform 15.

As shown in FIGS. 1 and 2, four projecting pieces 31 to 34 are provided on the front, rear, left and right of the lower portion of the slide table 16. And the hydraulic cylinders 35-38 which comprise the lateral movement means which each presses this protrusion piece 31-34 from the outside are provided through the support member 46. As shown in FIG.
When the slide table 16 is moved, all the hydraulic cylinder rods are lowered to the last retracted position, and the hydraulic oil is supplied only to the hydraulic cylinder to be driven. Can be moved (inching) in a predetermined direction. After the movement of the slide table 16 is finished, the hydraulic cylinders 35 to 38 press the corresponding protruding pieces 31 to 34 respectively, and if necessary, the hydraulic cylinders 35 to 38 are pressed. The movement of the slide table 16 can be locked by closing the valve.

Therefore, the moving distance of the slide table 16 that can be moved by the hydraulic cylinders 35 to 38 is the maximum misalignment distances a and b of the connecting tube 39 made of the lower tank or the dip pipe with respect to the axial center of the vacuum tank 11 shown in FIGS. Is sufficient.
The protrusion and stop of the hydraulic cylinders 35 to 38 are performed by operating a pendant switch 40 which is an example of an operation switch while visually confirming the misalignment amounts a and b.

On the slide table 16, a mounting table 41 on which the connecting pipe 39 is placed is provided. The mounting table 41 is provided with four hanging objects 42 around it, and further has a positioning hole 44 into which four protrusions 43 protruding on the slide table 16 are fitted. The mounting table 41 is separated from the slide table 16 when the connecting pipe 39 made of a lower tank or dip pipe placed in an upright state on the mounting table 41 is carried by a crane or the like. The mounting table 41 is placed at the position.
Reference numeral 45 denotes a compression coil spring provided on the mounting table 41. When the mounting flange 12 of the vacuum chamber 11 is not installed horizontally, the connecting pipe 39 is attached by using an elevating operation and spring deflection. The flange 12 is crimped without a gap.

Next, a method of using the lower tank or dip tube centering device 10 according to an embodiment of the present invention and its operation will be described.
A connecting tube 39 to be mounted on the mounting table 41 is mounted, and the mounting table 41 on which the connecting tube 39 is mounted is placed on a predetermined position of the slide table 16 using a crane. At this time, the slide table 16 is supported by the four hydraulic cylinders 35 to 38 so as not to move.
Next, the carriage 13 is caused to travel, and the connecting pipe 39 is disposed immediately below the mounting flange 12 of the vacuum chamber 11. And the raising / lowering means 14 is operated, the raising / lowering stand 15 is raised, and the connection pipe 39 and the attachment flange 12 are aligned. Here, when the position of the connecting pipe 39 does not coincide with the mounting flange 12, the pendant switch 40 is operated to extend one or two of the hydraulic cylinders 35 to 38 and press the corresponding protruding pieces 31 to 34. Then, the slide table 16 is moved. This centering operation may be repeated.
As a result, the connecting pipe 39 (in this case, the lower tank) and the mounting flange 12 of the vacuum tank 11 are aligned, so that the opposing flange is bolted.

If the angular positions of the opposing flanges do not match, a turntable can be further arranged on the slide table 16.
The same procedure is used when fixing the dip tube to the vacuum chamber 11 to which the lower tank is attached.
The present invention is not limited to the above-described embodiment, and can be modified without changing the gist of the present invention.

It is a front sectional view of the centering device of a lower tub or a dip tube concerning one embodiment of the present invention. FIG. It is a perspective view which shows the operation | movement condition of a slide table. It is explanatory drawing of a cross slide guide.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10: Center apparatus of a lower tank or a dip tube, 11: Vacuum tank, 12: Mounting flange, 13: Carriage, 14: Lifting means, 15: Lifting stand, 16: Slide table, 17: Wheel, 18: Rail, 19 : Motor, 20: Cover case, 21: Horizontal coupling member, 22: Auxiliary member, 23: Work stage, 24-27: Cross slide guide, 28: Upper rail, 29: Lower rail, 30: Sliding part, 31- 34: protruding piece, 35-38: hydraulic cylinder, 39: connecting pipe (lower tank or dip pipe), 40: pendant switch, 41: mounting table, 42: hanging hardware, 43: protrusion, 44: positioning hole, 45: Compression coil spring, 46: support member

Claims (4)

A connecting pipe centering device consisting of a lower tank or dip pipe attached to a lower position of a vacuum tank used for secondary refining,
A carriage movable to a position directly below the mounting flange of the vacuum chamber;
A lifting platform that moves up and down on the carriage by lifting means;
A slide table that is movably mounted on the lifting platform in four directions, front, back, left, and right, and that can hold the connecting pipe attached to a lower position of the vacuum chamber in an upright state;
A centering device for a lower tank or a dip tube, comprising: a lateral movement means capable of moving the slide table in the front-rear and left-right directions. 2. The lower tank or the dip tube centering device according to claim 1, wherein the slide table is arranged on the elevator base on the upper rail, the lower rail perpendicular to the upper rail, and the upper and lower rails arranged between the upper and lower rails. A lower tank or a core of a dip tube, each having a sliding portion that slides on a rail and being attached via four cross slide guides provided in the vicinity of each corner of the slide table Alignment device. The lower tank or dip tube centering device according to any one of claims 1 and 2, wherein projecting pieces are provided on the front, rear, left, and right of the lower part of the slide table, and the lateral movement means is configured so that the projecting pieces are respectively provided. A centering device for a lower tank or a dip tube, comprising four hydraulic cylinders to be pressed. 4. The lower tank or dip tube centering device according to claim 1, wherein a work stage is provided on the lifting platform, and the operation of the lateral movement means is performed by an operation switch. A lower tank or dip tube centering device characterized.

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