JPH10140224A - Lance device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lance device which can easily execute the centering work and the changing work of the lance and also, can prevent the promotion of dropping and heat deformation of the lance caused by the vibration during refining operation. SOLUTION: This lance device is provided with a lance fitting angle adjusting means for changing the fitting angle of the lance by fitting the lance as radiating state to the center and ascending/descending at least two of receiving members 50-52 fitting a first - a third supporting legs 15, an oxygen supplying hole connecting part 66 and cooling water supplying and draining hole connecting parts 67, 68 for executing the seal with each end part of the oxygen supplying tube 16 and the cooling water supplying and draining tubes 17, 18 by oppositely arranged to each end part of the oxygen supplying tube 16 and the cooling water supplying and draining tubes 17, 18, and descending with the dead wt. of the lance.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to, for example, a lance device used for a converter facility in a steel mill of an ironworks.
More specifically, the present invention relates to a lance device capable of quickly performing a lance replacement operation and a lance tube centering operation without requiring any labor or labor.

[0002]

2. Description of the Related Art Conventionally, in a converter steelmaking method in which steelmaking raw materials such as blast furnace molten iron and iron scrap are made in a converter (for example, an upper-blowing converter or an upper-bottom-blowing converter), steelmaking raw materials in the converter are used. As a device for blowing oxygen for blowing acid, a lance device which normally holds and moves up and down a lance is widely used.

[0003] Incidentally, since the lance blows oxygen in close proximity to the high-temperature steelmaking raw material, it is necessary to take into account thermal deformation and erosion caused by thermal radiation and the like of the high-temperature steelmaking raw material. Although it has a structure in which a refractory is further coated around a core metal provided with a cooling water passage through which cooling water passes around the passage, it still depends on the high temperature steelmaking raw material of about 1400 ° C. or more and its heat radiation. Therefore, there has been a problem that the core metal is warped and the refractory is damaged or melted due to the heat deformation.

Accordingly, for example, Japanese Patent Application Laid-Open No. 5-271742 discloses
Japanese Patent Application Laid-Open Publication No. H11-163873 proposes a well-known technique in which an oxygen passage and a cooling water passage can be connected / separated between a lance and an elevating platform that moves up and down while holding the lance.
After performing refining operations for about 0 minutes several times to replace refractory materials having a relatively fast progressing rate of deterioration, and after performing the refining operations for several tens more times (for example, about once a week)
Or, when it becomes difficult for the lance to pass through the lance insertion opening of the converter equipment due to thermal deformation, the core metal is replaced.

[0005]

However, the conventional lance device still has the following problems to be solved. That is, in the conventional lance device, a flange is provided at each end of the oxygen supply pipe of the core metal of the lance, and the cooling water supply and discharge pipes on the inlet side and the outlet side, and the oxygen supply pipe of the lift table, and A flange is also provided at each end of the cooling water supply and discharge pipes, and each of the pipes is detachable by a pair of half-shaped couplings in a state where the flanges are abutted. In addition, there has been a problem that the work of attaching and detaching a plurality of bolts and nuts for fastening a pair of half-split couplings is troublesome, resulting in poor workability.

Further, there is a problem that this troublesome replacement work must be performed frequently, which is very troublesome. Also,
When the lance is mounted on the lance mounting portion of the lift table, the flanges must be in a state of abutting each other, and there is a problem that severe positioning work in the height direction (hereinafter, referred to as the vertical direction) and the horizontal direction is required. .

[0007] By the way, in the normal operation, if the refractory of the lance does not melt or break, and only the core metal undergoes thermal deformation, the refining operation is continued until the lance does not pass through the lance insertion port. Only the centering of the lance is performed to reduce the number of replacements. That is, the lance tube 92 is
In the case of warping as shown by the two-dot chain line, the supporting legs 96 provided on both sides of the lance tube 92 according to the warping direction (hereinafter, referred to as the misalignment direction) and the amount of warpage (hereinafter, referred to as the misalignment amount). 13, one or a plurality of shims 94 are appropriately sandwiched in the gaps between the table and the elevating table 93 to adjust the mounting angle thereof.
As shown by the middle and solid lines, the apparent outer diameter (φ2) including the warp of the lance tube 92 is changed to the inner diameter (φ1) of the lance insertion port 95.
Put in.

However, since the misalignment direction and the misalignment amount are not constant, the shim 94 to be inserted into the lower portion of the support leg 96 must be adjusted while visually checking the misalignment direction and the misalignment amount one by one (see FIG. 1). 13), which is very troublesome and inferior in workability. The misalignment direction and misalignment amount of the lance 92 are collectively referred to as “lance attachment angle” as described above.

Further, as shown in FIG.
Is only fixed to the lance mounting portion 93a of the elevating table 93 using the wedge 94a, so that during the refining operation, vibration occurs due to acid supply or water passing through the lance 92,
There has been a problem that the wedge 94a may be loosened and the lance 92 may swing, or in the worst case, the lance 92 may fall from the elevator 93. In addition, due to the vibration of the lance 92, there is a problem in that the core metal that has been subjected to the heat load due to the high-temperature steelmaking raw material is easily bent, and it is necessary to replace it more frequently.

Therefore, the lance mounting portion 93a of the lift 93
Although a method of restraining the lance tube by driving a suitable wedge into the lance tube has also been proposed, there was a problem that a sufficient effect could not be obtained, for example, the degree of freedom was reduced and vibration could not be absorbed. The present invention has been made in view of such circumstances, and it is possible to easily perform centering work and replacement work of a lance, and also to prevent lance swing and thermal deformation due to vibration during refining operation. It is an object of the present invention to provide a lance device which can be used.

[0011]

According to the present invention, there is provided a semiconductor device comprising:
The described lance device has first to third lances formed around the upper part.
A lance having a U-shaped notch provided with a lance having a supporting leg, an oxygen supply pipe bent upward and facing downward at an off-axis position, and a cooling water supply and discharge pipe. A lance device which is detachably supported on a lift table, wherein the lance is radially mounted around the lance, and the mounting angle of the lance is changed by lifting and lowering at least two receiving members on which the respective legs are mounted. Lance mounting angle adjusting means, the oxygen supply pipe, and the cooling water supply, at each end of the discharge pipe, respectively, is disposed facing each other,
By lowering by the weight of the lance, there are provided an oxygen supply pipe, an oxygen supply port connection for sealing with each end of the cooling water supply and discharge pipes, and a cooling water supply and discharge port connection. doing.

The lance device according to a second aspect of the present invention is the lance device according to the first aspect, wherein the oxygen supply port connection portion and the cooling water supply / discharge port connection portion include the oxygen supply port connection portion, The cooling water supply and discharge port connection, the oxygen supply pipe, and each end of the cooling water supply and discharge pipe,
Each has a clamp mechanism for clamping. The lance device according to a third aspect is the lance device according to the first or second aspect, wherein each of the receiving members has a groove-shaped receiving seat, and the groove side portion advances and retreats in a horizontal direction, and A cotter is provided with advance / retreat driving means that fits into a lateral hole formed in a side portion and fixes the corresponding leg.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described with reference to the accompanying drawings to provide an understanding of the present invention. As shown in FIGS. 1 and 2, a lance device 10 according to an embodiment of the present invention includes a lance 11
And an elevating table 12 that holds and moves the lance 11 up and down. Hereinafter, these will be described in detail. First, with reference to FIG. 1 and FIG. 2, a converter facility using the lance device 10 according to the present embodiment and a state of attachment to the converter facility will be described.

As shown in FIGS. 1 and 2, in a building (not shown), a converter (for example, a top-blowing converter or an upper-bottom-blowing converter) 20 is disposed so as to be tiltable about a support shaft (not shown). Has been established. Above the rear part (right side in FIG. 2) of the converter 20, a pair of columns 21 are erected at parallel intervals, and between the columns 21, a gate-shaped elevating table 12 in front view is provided.
It is arranged so as to be able to move up and down by a pair of winches 22 which is an example of a lifting means described later.

As shown in FIGS. 2 and 6, the lifting platform 12 has a substantially rectangular horizontal platform section 12a extending forward (toward the converter side in the figure). The flat base portion 12a is formed with a lance mounting portion 12b formed of a U-shaped cutout in a plan view from the front end central portion toward the rear end side. The lance 11 is inserted and held in the lance mounting portion 12b.

The lance 11, as shown in FIG.
A traveling carriage 24 traversing a rail 23 horizontally arranged above the pair of columns 21 is suspended and transported from a storage room or a repair shop (not shown) to the vicinity of the upper portion between the columns 21, and is moved into the above-described building. The overhead traveling crane installed is suspended and inserted into the lance mounting portion 12b.

As shown in FIG. 2, a pair of winches 22 is disposed on the deck behind the columns 21. The wire ropes 26 fed from the wire drums 22a of the winches 22 are connected to the respective winches. A pair of guide sheaves 27 disposed above the front of the rail 22, a pair of ceiling sheaves 29 disposed on a support 28 below the rail 23, and a support 35 on the horizontal base 12a. A pair of sheaves 3
6 (see FIG. 6) are sequentially wound and then fixed to the lower portion of the support portion 28.

As shown in FIG. 1 and FIG. 6, a pair of guide rails 34, 34a are disposed along each of the columns 21 on the opposing inner surfaces of each of the columns 21. On both rear corners of the opposing horizontal platform 12a,
A pair of guide rollers 33, 33a that roll on the respective guide rails 34, 34a are respectively mounted. Therefore, when the wire drums 22a are synchronously rotated and the elevating table 12 is moved up and down, even if the lance 1 caused by acid supply or water flow is used.
Even if the first vibration occurs, the swinging motion of the lift 12 can be prevented.

As shown in FIGS. 1 and 2, the converter 2
Above 0, a dust collecting hood 30 that can be raised and lowered by a lifting means (not shown) is provided. The dust collecting hood 30 has a flue 3 communicating with an exhaust gas device (not shown).
1 is formed so that high-temperature gas exhausted from the converter 20 can be sent and processed. The flue 31 communicating with the dust collecting hood 30 has a lance 11
A lance insertion port 32 for inserting the lance is formed.

Next, the configuration of each part of the lance device 10 according to the present embodiment, which is preferably used in the above-described converter equipment, will be described in detail. First, the lance 11 will be described with reference to FIGS. As shown in FIG.
The lower part is made of a good heat conductive material such as copper or copper alloy,
A refractory (not shown) is provided around the lower end of the cored bar 14 composed of a long tubular member having a triple structure in which the cooling water passage 14b is formed substantially coaxially around the oxygen passage 14a at the axis thereof. A lance tube 13 having a well-known structure formed by coating is provided.

The upper part of the lance tube 13 is shown in FIGS.
As shown in FIG. 1, three legs (or referred to as first to third legs) 1 each of which has a round bar shape (see FIGS. 7 and 8).
5 are radially arranged horizontally in plan view. As shown in FIGS. 3 to 6, each of the legs 15 has a square rod-shaped base 15 a (see FIGS. 7 and 11) close to the lance tube 13.
While sandwiched between a pair of upper and lower disk-shaped support plates 37a,
A plurality of trapezoidal ribs 37 are fixedly arranged on the upper surface of a disk-shaped small-diameter support plate 37b provided on the upper support plate 37a by radially attaching a plurality of trapezoidal ribs 37 in plan view.

As shown in FIGS. 3 to 7, around the upper part of the lance tube 13, a hook portion 38 is attached to a peripheral edge portion facing 180 °, and the hook portion 38 is hooked to the hook portion 38. On the upper part of the support portion 39, a lance 1 is provided by a winch (not shown) provided on the traveling carriage 24 or a hoist type winch 25.
A hook 40 for suspending the hook 1 is attached. As shown in FIGS. 3 to 5, an oxygen supply pipe 16 is connected to the oxygen passage 14 a of the lance pipe 13.
Discharge pipes 17 and 18 are connected.

The oxygen supply pipe 16 and the cooling water supply / discharge pipes 17 and 18 are bent as shown in FIGS. 3 to 5, respectively, and have an oxygen supply port 16a at one end thereof and a cooling water supply / discharge port 17a. , 18a are respectively directed to an oxygen supply port connection portion 66 and a cooling water supply / discharge port connection portion 67, 68 described later at an off-axis position of the lance tube 13 (see FIG. 9). As shown in FIGS. 9 and 10, the oxygen supply pipe 16 and the cooling water supply / discharge ports 67 and 68 are provided at the ends of the oxygen supply pipe 16 and the cooling water supply / discharge pipes 17 and 18, respectively. Connection fittings 19 to be connected to are connected respectively.

Here, a specific configuration of the connection fitting 19 of the oxygen supply pipe 16 will be described in detail with reference to FIGS. 9 and 10. FIG. The cooling water supply and discharge pipes 17, 1
8 have the same configuration, and therefore the description thereof will be omitted, and each component will be denoted by the same reference numeral.

As shown in FIGS. 9 and 10, a flange 41 is connected to the end of the oxygen supply pipe 16, and a cylindrical flange is attached to the lower end surface of the flange 41 by fastening means 42 such as bolts. 43 are fastened. A cylindrical support member 44 extending downward is attached to an outer peripheral portion of the flange 43 by fastening means such as a bolt (not shown). A cylindrical sliding cylinder 45 is disposed below the flange 43 so as to be slidable up and down in the support member 44 by a coil spring 46 hung in the flange 43 and the sliding cylinder 45. Have been. At the lower ends of the sliding cylinder 45 and the support member 44, a taper fitting 47 whose inside is enlarged and opened downward is attached, and the respective axes of the oxygen supply pipe 16 and the oxygen supply port connection part 66 are attached. Even if there is a slight deviation, the connection can be made smoothly by utilizing the tapered surface whose diameter increases downward.

Further, a large-diameter flange 4 for hooking a clamp claw 83 described later is provided around the lower portion of the support member 44.
A cylindrical spacer guide 49 extending downward is attached to the outer peripheral portion of the large-diameter flange 48 by fastening means such as bolts (not shown).

Next, the elevator 12 holding the lance 11 having the above-described configuration will be described in detail with reference to FIGS. The lance mounting portion 12b of the lift 12
As shown in FIGS. 6 to 8, around the center of the lance 11, to support each support leg 15 of the lance 11,
Three groove-shaped receiving members (or first to first) radially in plan view
50-52).
In addition, as shown in FIG. 7, in order to change the mounting angle of the lance 11 in which the supporting legs 15 are supported by the receiving members 50 to 52, the lower portions of the first and second receiving members 50 and 51 are different from each other. Two lance mounting angle adjusting means (also referred to as first and second lance mounting angle adjusting means) 61 for raising and lowering the receiving members 50 and 51 are provided.

Here, with reference to FIGS. 6 and 7, specific configurations of the receiving member 50 and the lance mounting angle adjusting means 61 will be described in detail. The other receiving member 51 and the corresponding lance mounting angle adjusting means 61
Since they also have the same configuration, the description will be omitted, and each unit will be denoted by the same reference numeral. As shown in FIG.
An opening 12c is formed in a predetermined portion of the hollow horizontal base 12a (that is, in the trajectory of each support leg 15 indicated by a broken line in FIG. 6). A bracket 53 having a horizontal shaft 53a is placed on the horizontal base 12a so as to surround the opening 12c.

The horizontal shaft 53a of the bracket 53 has
A generally U-shaped bracket 54 in cross section is rotatably hung, and a lower end of the bracket 54 is sandwiched by a central portion of the bracket 54.
5 is rotatably disposed. And this seat 5
A lateral hole 55a is opened in one side wall of the cylindrical guide 5 and a cylindrical guide 5 is formed substantially coaxially with the lateral hole 55a outside the side wall.
Further, a cylinder 57 that uses nitrogen gas as a fluid, which is an example of advance / retreat driving means, is horizontally arranged on the guide 56.

The rod 57 of the cylinder 57
A taper-like cotter 58 is attached to the tip end of a. Accordingly, by horizontally moving the rod 57a of the cylinder 57, the cotter 58 at the tip of the rod 57a can fix the support leg 15 inserted into the groove of the receiving seat 55 through the lateral hole 55a.

The lower surface of the tip of the cotter 58 is a concave curved surface having a radius of curvature substantially equal to the radius of the support leg 15 so that the support leg 15 in the receiving seat 55 can be firmly fixed. . Also, as shown in FIG. 7, brackets 53, 5 and 5 are provided in the hollow portion of the horizontal base portion 12a.
Screw jack 5 that moves up and down receiving seat 55 through
A lance mounting angle adjusting means 61 comprising a gear 9 and a geared motor 60 with a brake for driving the screw jack 59 is provided.

The rod 59 of the screw jack 59
The enlarged diameter portion at the end of “a” is firmly fixed to the bracket 54 by a holding member 62 disposed at the lower end of the bracket 54. Therefore, even if the lance 11 vibrates due to acid supply or water flow, swinging can be prevented. In FIG. 7, reference numeral 63 denotes a limit switch for limiting an operation range, which is installed on a bracket 64 installed in the horizontal platform 12a. Next, referring to FIG.
The receiving member 52 will be described. The same components as those of the other receiving members 50 and 51 described above are denoted by the same reference numerals and description thereof will be omitted.

As shown in the figure, the receiving member 52 is provided on a horizontal shaft 65a of a bracket 65 disposed on a predetermined portion of the horizontal base portion 12a by a fastening means such as a bolt. Are rotatably disposed. Therefore, by raising and lowering the first and second receiving members 50 and 51, the third support leg 15 can easily adjust the mounting angle of the lance 11 about the horizontal shaft 65a. Further, as shown in FIGS. 6, 9 and 10, on one side (upper side in FIG. 6) of the horizontal base portion 12a, an oxygen supply pipe 16 of the lance 11 and cooling water supply and discharge pipes 17 and 18 are provided. ,
An oxygen supply port connection 66 and a cooling water supply / discharge port connection 67, 68 connected to each other are arranged in parallel.

Here, the specific structure of the above-described oxygen supply port connecting portion 66 will be described in detail with reference to FIGS. 9 and 10. FIG. Since the cooling water supply / discharge port connecting portions 67 and 68 have the same configuration, description thereof will be omitted, and each portion will be denoted by the same reference numeral. As shown in FIG. 9, a fixed pipe 69 is inserted into an opening 12d formed on one side of the horizontal base section 12a.
Are connected, and a short pipe 71 is connected to the upper end of the flexible tube 70. As shown in FIG. 10, a flange 72 is provided at the upper end of the short pipe 71, and the upper end of the flange 72 is in contact with the sliding cylinder 45 by fastening means 73 such as bolts. A cylindrical cylinder 74 is mounted. A large-diameter flange 75 that contacts the spacer guide 49 is provided on the outer peripheral portion of the cylinder 74.

At the lower end of the large-diameter flange 75, a flange 77 for engaging a bracket 82 of a clamp mechanism 81 described later is provided. At the lower end of the flange 77, a short pipe 71 and a flexible tube are provided. A cylindrical cylinder 76 surrounding a part of 70 is provided.
As shown in FIGS. 9 and 10, a cylindrical small-diameter cylinder 78 surrounding most of the flexible tube 70 is provided at the upper end of a flange 79 provided at the lower end of the flexible tube 70. Have been. The cylinders 76 and 78 are arranged with a predetermined gap in the radial direction, with a predetermined gap therebetween in the upper and lower directions,
The inner peripheral surface of the opposed cylinder 76 and the cylinder 78
Sliding members 80 made of metal such as iron or polyamide or the like are disposed in close contact with each other on the outer peripheral surfaces of the members to fill the gaps.

Therefore, when the oxygen supply pipe 16 and the oxygen supply port connecting portion 66 are connected, the weight of the lance 11 causes
Even if the upper portion of the oxygen supply port connection portion 66 sinks (that is, even if the flexible tube 70 shrinks), there is no danger of oxygen leaking vigorously. Further, a pair of clamp mechanisms 81 are provided on the outer peripheral surface of
Are arranged. Here, the above-described clamp mechanism 81
Will be described in detail with reference to FIGS. 6, 9, and 10. FIG. As shown in FIGS. 9 and 10, a vertically elongated bracket 82 is disposed on the outer peripheral surface of the cylinder 76 with its upper end abutting on the flange 77. Above the bracket 82, a hook-shaped clamp claw 83 is provided so as to be rotatable around an upper pivot 82a.

On the other hand, below the bracket 82, a cylinder 84 using nitrogen gas as a working fluid is disposed so as to be rotatable about a lower pivot 82b. The distal end of the rod 84a of the cylinder 84 is connected to the rear end of the clamp claw 83 by a pivot 82c. Therefore, by driving the cylinder 84, the cylinder 84 can be freely moved to a non-clamp state shown by a two-dot chain line or a clamp state shown by a solid line in FIG.

9 and 10, reference numeral 85 denotes a cover such as a bellows for covering the rod 84a of the cylinder 84, and reference numeral 86 in FIGS.
It is a cushioning material such as rubber laid on 2a. Further, as shown in FIGS. 6, 11 and 12, a device for automatically fixing the lance 11 is broken at a peripheral portion 180 ° opposite to the axis of the lance 11 on the horizontal base 12a. In this case, a pair of lance fixing means 8 for temporarily fixing the lance 11
7 are provided.

Here, the lance fixing means 87 will be described in detail. As shown in FIG.
A notch 88 having a substantially rectangular shape in a plan view is formed at a predetermined portion of the pair of support plates 37a. On the other hand, this notch 8
A long rod-shaped bracket 89 is provided upright at a predetermined portion of the horizontal base portion 12a facing the upper surface 8. This bracket 89
Is formed with an opening 89a into which the wedge 90 is fitted, so that when the lance 11 is inserted and held in the elevating platform 12, as shown in FIG. Can be fixed.

Next, a method of using the lance device 10 according to the present embodiment having the above-described configuration will be described. First, as shown in FIG. 2, the respective wire drums 22a of a pair of winches 22 installed on the deck behind the columns 21 are synchronously rotated, and the wire ropes 26 fed from the respective wire drums 22a are wound / wound. By returning, the horizontal platform 12a of the elevating platform 12 is moved to the working deck 91.
(See FIG. 6). Next, the lance 11 suspended and transported by the traveling carriage 24 from a storage room or a repair shop (not shown) to the upper part of the support 21 is suspended and inserted into the lance mounting portion 12b of the lifting platform 12 by the hoist type winch 25.

At this time, each leg 15 and each receiving member 50-5
The alignment can be performed only by hanging and inserting while checking the position of No. 2 (that is, without checking the positions of the connection fittings 19 and the connection portions 66 to 68). Further, since the taper fitting 47 is attached to each of the connection fittings 19, even if the axis of each of the connection fittings 19 and the axis of each of the connection portions 66 to 68 are slightly displaced, they are coaxial. Can be matched. Then, when the lance 11 is completely inserted, the flexible tube 70 and the coil spring 46 slightly sink downward (that is, are compressed), so that the connection can be made with good sealing properties alone.

Next, the cylinder 57 is driven to fix each support leg 15 with the cotter 58, and the cylinder 84 is fixed.
Is driven to clamp the connection fittings 19 and the connection portions 66 to 68, and then adjust the first and second receiving members 50 and 51 while visually checking the positional relationship between the lance insertion port 32 and the lance tube 13. Perform centering. Thereby, swinging of the lance 11 due to acid supply or water flow during the refining operation can be reliably prevented. Then, after this work is completed, at the time of refining start, each winch 22 is driven to move down the elevator 12.
At this time, when the elevator 12 or the lance tube 13 is lowered to a predetermined position, a hole cone (not shown) of the lance insertion port 32 is opened, and the lance pipe 13 is further moved to the lance insertion port 32.
Via the hot metal in the converter 20.

Then, from an oxygen supply device (not shown), the oxygen supply port connecting portion 66 and the oxygen supply pipe 16 are successively provided.
Oxygen is blown into the converter 20 to make steel. Then, when the smelting operation is completed after a predetermined time has elapsed, the operation is substantially reverse to that described above, and the lance tube 13 is raised. During this time, the cooling water circulation device (not shown) returns to the cooling water circulation device again via the cooling water supply port connection 67, the cooling water supply 17, the cooling water passage 14b, the cooling water discharge pipe 18, and the cooling water discharge connection 68. It goes without saying that the cooling water is circulated to prevent the lance 11 from being melted or damaged.

The embodiment of the present invention has been described above.
The present invention is not limited to these embodiments, and all changes in conditions without departing from the gist are within the scope of the present invention. For example, in the present embodiment, the oxygen supply port 16a, the cooling water supply,
Although the heights are substantially the same up to a and 18a, it is possible to make the heights different. In addition, although each support leg 15 of the lance 11 is provided horizontally from the lance 11, it is also possible to attach the lance 11 slightly obliquely. The rod 59a of the screw jack 59 of the lance mounting angle adjusting means 61
It is also possible to provide a convex curved surface seat at the tip of. In addition,
In the embodiment (FIG. 9), the present invention is applied to a case where the oxygen supply pipe 16 is replaced with a cooling water discharge pipe and the cooling water discharge pipe 18 is replaced with an oxygen supply pipe.

[0045]

As is apparent from the above description, in the lance device according to the first to third aspects, for example, the mounting angle of the lance (in other words, the lance The inclination angle of the lance can be easily changed, and as a result, the centering operation of the lance tube can be easily performed. Therefore, conventionally,
Since it is not necessary to insert one or several shims in the gap between the lance mounting portion of the elevating table and the lance tube in accordance with the misalignment direction and the misalignment amount of the lance tube with respect to the lance insertion port, the work can be eliminated. Performance can be improved.

In particular, in the lance device according to the second aspect, the oxygen supply port and the cooling water supply / discharge port and the oxygen supply port connection section and the cooling water supply / discharge port connection section are closely connected by the weight of the lance. In addition, since a clamp mechanism is provided, more reliable connection can be performed.
In the lance device according to the third aspect, since each leg is fixed by the cotter, the lance is prevented from dropping,
Workability and safety can be improved.

[Brief description of the drawings]

FIG. 1 is an explanatory view of a lance device according to an embodiment of the present invention and a converter facility that preferably uses the lance device.

FIG. 2 is an explanatory view of the lance device and converter equipment.

FIG. 3 is a front view showing the entire configuration of the lance.

FIG. 4 is a side view of a main part of the lance.

FIG. 5 is a plan view of a lance.

FIG. 6 is a plan view showing the entire configuration of the elevator.

FIG. 7 is a cross-sectional view showing a configuration of first and second receiving members and a first lance mounting angle adjusting unit.

FIG. 8 is a side view of a third receiving member.

FIG. 9 is an explanatory diagram showing the entire configuration of the elevator.

FIG. 10 is a sectional view of a main part of an oxygen supply pipe and an oxygen supply port connection part.

FIG. 11 is a plan view of a main part of the elevator.

FIG. 12A is a side view of a main part of the lance fixing means. (B) is a front view of a main part of the lance fixing means.

FIG. 13 is an explanatory diagram of a centering operation of a lance device according to a conventional example.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 Lance apparatus 11 Lance 12 Elevating stand 12a Horizontal stand part 12b Lance mounting part 12c Opening 12d Opening 13 Lance pipe 14 Core 14a Oxygen passage 14b Cooling water passage 15 Support 15a Base 16 Oxygen supply pipe 16a Oxygen supply port 17 Cooling water Supply pipe 17a Cooling water supply port 18 Cooling water discharge pipe 18a Cooling water discharge port 19 Connection fitting 20 Converter 21 Support 22 Winch (elevating means) 22a Wire drum 23 Rail 24 Traveling trolley 25 Hoist winch 26 Wire rope 27 Guide sheave 28 Supporting part 29 Ceiling sheave 30 Dust collection hood 31 Flue 32 Lance insertion opening 33 Guide roller 33a Guide roller 34 Guide rail 34a Guide rail 35 Supporting part 36 Sheave 37 Trapezoidal rib 37a Support plate 37b Small diameter support plate 38 Hook part 39 Holding portion 40 Hook 41 Flange 42 Fastening means 43 Flange 44 Support member 45 Sliding cylinder 46 Coil spring 47 Taper fitting 48 Large diameter flange 49 Spacer guide 50 First receiving member (receiving member) 51 Second receiving member (Receiving member) 52) Third receiving member (receiving member) 53 Bracket 53a Horizontal axis 54 Bracket 55 Receiving seat 55a Side hole 56 Guide 57 Cylinder (reciprocating drive means) 57a Rod 58 Cotter 59 Screw jack 59a Rod 60 Geared motor with brake 61 Lance mounting angle Adjusting means 62 Hold down 63 Limit switch 64 Bracket 65 Bracket 65a Horizontal axis 66 Oxygen supply port connection (connection) 67 Cooling water supply port connection (connection) 68 Cooling water outlet connection (connection 69 Fixed piping 70 Flexible tube 71 Piping 72 Flange 73 Fastening means 74 Cylinder 75 Flange 76 Cylinder 77 Flange 78 Cylinder 79 Flange 80 Sliding material 81 Clamp mechanism 82 Bracket 82a Upper pivot 82b Lower pivot 82c Axis 83 Clamp claw 84 Cylinder 84a Rod 85 Cover 86 cushioning material 87 lance fixing means 88 notch 89 bracket 89a opening 90 wedge 91 work deck

Continued on the front page (72) Inventor Takeshi Tsukahara 1-1, Tobata-cho, Tobata-ku, Kitakyushu-shi, Fukuoka New Nippon Steel Corporation Yawata Works (72) Inventor Takaaki Mine 1, Tobihata-cho, Tobata-ku, Kitakyushu, Fukuoka No. 1 Inside Nippon Steel Corporation Yawata Works (72) Inventor Toyoharu Suenaga 1-1, Tsukiji-cho, Yawatanishi-ku, Kitakyushu-shi, Fukuoka Prefecture Inside Takada Industries Co., Ltd. (72) Inventor Akito Beppu, Yawata-nishi-ku, Kitakyushu-shi, Fukuoka 1-1, Tsukiji-cho, Takada Kogyosho Co., Ltd. (72) Inventor Koichi Ono 1-1, Tsukiji-cho, Yawatanishi-ku, Kitakyushu-city, Fukuoka Prefecture In-house Takada Kogyosho Co., Ltd. No. 1 in Takada Kogyosho

Claims (3)

[Claims] A first support leg formed around the upper portion; an oxygen supply tube bent at the upper portion and facing downward at an off-axis position; and a cooling water supply and discharge tube. A lance device for detachably supporting a lance on a lifting platform having a lance mounting portion formed of a U-shaped notch, wherein the lance is radially mounted around the lance and a receiving member to which each of the legs is mounted. By moving at least two up and down, the lance mounting angle adjusting means for changing the mounting angle of the lance, and at each end of the oxygen supply pipe, and the cooling water supply and discharge pipe, respectively, are disposed facing each other, By lowering by the weight of the lance, there are provided an oxygen supply pipe, an oxygen supply port connection for sealing with each end of the cooling water supply and discharge pipes, and a cooling water supply and discharge port connection. Doing things Lance apparatus according to claim. 2. The oxygen supply port connection section and the cooling water supply and discharge port connection section include the oxygen supply port connection section and the cooling water supply and discharge port connection section, the oxygen supply pipe, and The lance device according to claim 1, further comprising a clamp mechanism that clamps each end of the cooling water supply and discharge pipes. 3. Each of the receiving members has a groove-shaped receiving seat, and moves in a horizontal direction in a groove side portion thereof, and fits into a lateral hole formed in the groove side portion to correspond to each of the supporting legs. 3. The lance device according to claim 1, further comprising a cotter provided with an advance / retreat driving means for fixing the lance.