JP3512960B2 - Lance device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lance device used for converter equipment in a steelmaking plant of a steel mill, for example.
More specifically, the present invention relates to a lance device that can quickly perform lance replacement work and lance tube centering work without labor and labor.

[0002]

2. Description of the Related Art Conventionally, in a converter steelmaking method for manufacturing steelmaking raw materials such as blast furnace hot metal and iron scraps in a converter (for example, a top-blown converter or a bottom-blown converter), the steelmaking raw materials in the converter are A lance device that normally holds a lance and moves up and down is widely used as a device for injecting oxygen for blowing acid.

By the way, since this lance blows oxygen in the vicinity of the high temperature steelmaking raw material, oxygen which normally passes oxygen is taken into consideration in consideration of thermal deformation, melting loss, etc. due to heat radiation of the high temperature steelmaking raw material. Although the structure is such that a refractory material is further coated on the periphery of a core bar provided with a cooling water passage for passing cooling water around the passage, it is still dependent on the high temperature steelmaking raw material of about 1400 ° C or higher and its heat radiation. As a result, there is a problem in that the core bar warps due to thermal deformation and the refractory is damaged or melted due to the thermal deformation.

Therefore, for example, Japanese Patent Laid-Open No. 5-271742
Japanese Patent Laid-Open Publication No. 2003-242242 proposes a well-known technique in which an oxygen passage and a cooling water passage can be connected / disconnected between a lance and an elevating / lowering table that holds and raises / lowers the lance.
After refining the refractory having a relatively high deterioration progress rate by performing refining operation for about 0 minutes several times, and further performing the refining operation several tens times (for example, about once a week).
Alternatively, the core bar is replaced when it becomes difficult for the lance to pass through the lance insertion port of the converter equipment due to thermal deformation.

[0005]

However, the above-mentioned 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 inlet and outlet of the cooling water supply and discharge pipes, and the oxygen supply pipe of the lifting table, and A flange is also provided at each end of the cooling water supply and discharge pipes, and each pipe can be attached and detached by a pair of half split couplings with the flanges abutting each other. In addition, there is a problem in that the work of attaching and detaching a plurality of bolts and nuts for fastening a pair of half-divided couplings is troublesome and the workability is poor.

Further, there has been a problem that this troublesome replacement work has to be carried out frequently, which is very troublesome. Also,
When the lance was attached to the lance mounting part of the lift, the flanges had to be in a state of being abutted against each other, and there was a problem that a severe positioning work in the height direction (hereinafter, referred to as the vertical direction) and the horizontal direction was required. .

By the way, during normal operation, when the lance refractory is not melted or damaged, and only the core metal is thermally deformed, the lance is not passed through the lance insertion port until every refining operation. Only the lance centering work is performed to reduce the number of replacement work. That is, the lance tube 92 is shown in FIG.
When warped as indicated by a two-dot chain line in the middle, the supporting legs 96 provided on both sides of the lance tube 92 according to the warp direction (hereinafter, referred to as a center deviation direction) and the amount of warp (hereinafter, referred to as a center deviation amount). And one or a plurality of shims 94 are appropriately sandwiched in the gaps between the lift table 93 and the lift table 93, and the mounting angle thereof is adjusted.
As shown by the middle and solid lines, the apparent outer diameter (φ2) including the warp of the lance tube 92 is the inner diameter (φ1) of the lance insertion port 95.
It is stored inside.

However, since the misalignment direction and the misalignment amount are not constant, the shim 94 to be inserted into the lower portion of the supporting leg 96 must be adjusted while visually confirming the misalignment direction and the misalignment amount (see FIG. 13), there is a problem that it is very troublesome and inferior in workability. The misalignment direction and the misalignment amount of the lance 92 are collectively referred to as the "lance mounting angle" as described above.

Further, as shown in FIG.
Is only fixed to the lance mounting portion 93a of the lift table 93 by using the wedge 94a, so during the refining operation, vibration is generated due to the supply of acid or water to the lance 92,
There is a problem that the wedge 94a may loosen and the lance 92 may swing, or in the worst case, the lance 92 may drop from the lift table 93. Further, due to the vibration of the lance 92, the core metal subjected to the heat load due to the high-temperature steel-making raw material is easily bent, and it is necessary to replace the core metal more frequently.

Therefore, the lance mounting portion 93a of the lifting table 93
Although a method of hitting a suitable wedge to restrain the lance tube has been proposed, on the contrary, there is a problem in that the degree of freedom is reduced and vibration cannot be absorbed, so that a sufficient effect cannot be obtained. The present invention has been made in view of such circumstances, and it is possible to easily perform centering work and replacement work of the lance, and prevent vibration of the lance and promotion of thermal deformation due to vibration during refining operation. An object of the present invention is to provide a lance device that can be used.

[0011]

A method according to the above-mentioned object.
The described lance device has first to third parts formed around the upper part.
And a lance provided with an oxygen supply pipe bent downward at an off-axis position and a cooling water supply / discharge pipe, and a lance mounting portion made of a U-shaped cutout. A lance device detachably supported on a lift table, the mount angle of the lance being changed by lifting and lowering at least two receiving members that are radially mounted around the lance and on which the supporting legs are mounted. Lance mounting angle adjusting means, the oxygen supply pipe, and at each end of the cooling water supply, discharge pipe, are arranged to face each other,
It has an oxygen supply pipe and an oxygen supply port connection part that seals with each end of the cooling water supply and discharge pipe by descending due to the weight of the lance, and a cooling water supply and discharge port connection part. is doing.

A lance device according to a second aspect 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 are the oxygen supply port connection portion, and The cooling water supply / discharge port connection part, and the oxygen supply pipe, and the cooling water supply / discharge pipe end portions,
Each has a clamping 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 portions are advanced and retracted in the horizontal direction to form the groove. The cotter is provided with a forward / backward drive means that is fitted into a lateral hole formed in the side portion and fixes the corresponding support leg.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION Next, referring to the attached drawings, an embodiment in which the present invention is embodied will be described to provide an understanding of the present invention. As shown in FIGS. 1 and 2, the lance device 10 according to the embodiment of the present invention includes a lance 11
And a lifting table 12 that holds the lance 11 and moves up and down. These will be described in detail below. First, with reference to FIG. 1 and FIG. 2, a converter equipment using the lance device 10 according to the present embodiment and a mounting state to the converter equipment will be described.

As shown in FIGS. 1 and 2, a converter (for example, a top blowing converter or a bottom blowing converter) 20 is tiltably arranged around a spindle (not shown) in a building (not shown). It is set up. Above the rear part of the converter 20 (on the right side in FIG. 2), a pair of support columns 21 are erected at parallel intervals, and between the support columns 21, an elevation table 12 in a front view gate shape is formed.
A pair of winches 22, which are an example of an elevating means described later, are arranged so as to be able to move up and down.

As shown in FIGS. 2 and 6, the lift table 12 has a horizontal base portion 12a, which is substantially rectangular in a plan view and extends forward (toward the converter side in the drawing), formed on the upper portion thereof. The flat base portion 12a is formed with a lance mounting portion 12b which is a U-shaped notch in plan view from the center portion of the front end toward the rear end side. The lance 11 is inserted and held in the lance mounting portion 12b.

The lance 11 is, as shown in FIG.
By a traveling carriage 24 traversing a rail 23 horizontally arranged above the pair of support columns 21, it is suspended and transported from a storage or repair shop (not shown) to the vicinity of the upper part between the support columns 21 while being transported inside the building. It is adapted to be suspended and attached to the lance mounting portion 12b by the installed overhead traveling crane.

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

Further, as shown in FIGS. 1 and 6, a pair of guide rails 34 and 34a are provided along the respective support columns 21 on the inner surface sides of the respective support columns 21 facing each other. At the two corners on the rear side of the facing horizontal base 12a,
A pair of guide rollers 33, 33a rolling on the respective guide rails 34, 34a are attached. Therefore, when the wire drums 22a are synchronously rotated to move up and down the elevating table 12, even if the lance 1 is caused by acid feeding or water passing.
Even if the vibration of No. 1 occurs, the rocking of the lift 12 can be prevented.

As shown in FIGS. 1 and 2, the converter 2
A dust collecting hood 30 that can be moved up and down by a not-shown elevating means is disposed above 0. The dust collecting hood 30 has a flue 3 communicating with an exhaust gas device (not shown).
1 is formed so that the high temperature gas exhausted from the converter 20 can be fed and processed. The lance 11 is connected to the smoke passage 31 communicating with the dust collecting hood 30.
Is formed with a lance insertion opening 32.

Next, the configuration of each part of the lance device 10 according to the present embodiment, which is preferably used in the converter equipment described above, will be described in detail. First, the lance 11 will be described with reference to FIGS. As shown in FIG. 3, the lance 11
The lower part is made of a good heat conductive material such as copper or copper alloy,
A refractory material (not shown) is provided around the lower end portion of the cored bar 14 made 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 center of the shaft. A lance tube 13 having a well-known structure formed by coating is provided.

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

As shown in FIGS. 3 to 7, around the upper portion of the lance tube 13, a hooking portion 38 is attached to the peripheral portions facing each other by 180 ° and hooked on the hooking portion 38. A winch (not shown) or a hoist type winch 25 provided on the traveling carriage 24 is provided on the upper portion of the support portion 39 to secure the lance 1.
A hook 40 for suspending 1 is attached. Further, as shown in FIGS. 3 to 5, an oxygen supply pipe 16 is connected to the oxygen passage 14a of the lance pipe 13, and cooling water is supplied to the inlet side and the outlet side of the cooling water passage 14b, respectively.
The discharge pipes 17 and 18 are connected.

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

Here, a specific structure of the connecting fitting 19 of the oxygen supply pipe 16 will be described in detail with reference to FIGS. 9 and 10. In addition, cooling water supply and discharge pipes 17, 1
Since the connection metal fittings 19 of No. 8 also have the same configuration, the description thereof will be omitted and the respective parts will be denoted by the same reference numerals.

As shown in FIGS. 9 and 10, a flange 41 is connected to the end of the oxygen supply pipe 16, and the lower end surface of the flange 41 is formed into a cylindrical flange by fastening means 42 such as bolts. 43 is fastened. A cylindrical support member 44 extending downward is attached to the outer peripheral portion of the flange 43 by fastening means such as bolts (not shown). Further, below the flange 43, a cylindrical sliding cylinder 45 is disposed so as to be slidable up and down in the support member 44 by a coil spring 46 hooked in the flange 43 and the sliding cylinder 45. Has been done. Further, at the lower ends of the sliding cylinder 45 and the support member 44, a tapered metal fitting 47 whose inside is expanded and opened downward is attached, and each axial center of the oxygen supply pipe 16 and the oxygen supply port connection portion 66. Even if there is a slight deviation, the taper surface that expands downward can be used to connect smoothly.

Further, a large-diameter flange 4 is provided around the lower portion of the support member 44 for retaining a clamp claw 83 which will be described later.
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, with reference to FIGS. 6 to 12, the elevating table 12 for holding the lance 11 having the above-described structure will be described in detail. Lance mounting portion 12b of the lifting table 12
As shown in FIG. 6 to FIG. 8, the supporting legs 15 of the lance 11 are supported around the periphery of the lance 11.
The three groove-shaped receiving members (or the first to the first radial) in a plan view
The third receiving members) 50 to 52 are provided.
Further, as shown in FIG. 7, in the lower portions of the first and second receiving members 50 and 51, the mounting angles of the lances 11 in which the supporting legs 15 are supported by the receiving members 50 to 52 are changed. Two lance mounting angle adjusting means (or first and second lance mounting angle adjusting means) 61 for raising and lowering the receiving members 50, 51 are provided.

Now, with reference to FIG. 6 and FIG. 7, the specific configurations of the above-mentioned receiving member 50 and lance mounting angle adjusting means 61 will be described in detail. Incidentally, another receiving member 51 and a lance mounting angle adjusting means 61 corresponding thereto.
Also have the same configuration, the description thereof 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 portion 12a (that is, in the locus of each supporting leg 15 shown by a broken line in FIG. 6). A bracket 53 having a horizontal shaft 53a is mounted on the horizontal base 12a so as to surround the opening 12c.

On the horizontal shaft 53a of the bracket 53,
A bracket 54 having a substantially U-shaped cross section is rotatably suspended, and a lower end portion of the bracket 54 is sandwiched by a central portion of the bracket 54. The groove-shaped receiving seat 5 for receiving the supporting leg 15 is provided.
5 is rotatably arranged. And this seat 5
A lateral hole 55a is opened in one side wall of the tubular guide 5, and a tubular guide 5 is provided on the outside of the side wall thereof substantially coaxially with the lateral hole 55a.
6 is provided, and a cylinder 57 that uses nitrogen gas as a fluid, which is an example of advancing / retreating driving means, is horizontally arranged on the guide 56.

The rod 57 of this cylinder 57
A tapered cotter 58 is attached to the tip of a. Therefore, by horizontally moving the rod 57a of the cylinder 57 forward and backward, the cotter 58 at the tip of the rod 57a can pass through the lateral hole 55a and fix the support leg 15 inserted in the groove of the receiving seat 55.

The lower surface of the tip of the cotter 58 is a concave curved surface having a radius of curvature substantially the same as the radius of the supporting leg 15, so that the supporting leg 15 in the receiving seat 55 can be firmly fixed. . Further, as shown in FIG. 7, the brackets 53, 5 are provided in the cavity of the horizontal base 12a.
Screw jack 5 that raises and lowers the receiving seat 55 via 4
9 and a lance mounting angle adjusting means 61 including a geared motor 60 with a brake for driving the screw jack 59.

The rod 59 of this screw jack 59
The enlarged diameter portion at the tip of a is firmly fixed to the bracket 54 by a pressing fitting 62 arranged at the lower end of the bracket 54. Therefore, even if the lance 11 vibrates due to the acid supply or the water flow, the oscillation can be prevented. In FIG. 7, reference numeral 63 is a limit switch installed on a bracket 64 installed in the horizontal base 12a for restricting an operation range. Next, referring to FIG. 8, the remaining third
The receiving member 52 will be described. The same components as those of the other receiving members 50 and 51 described above are designated by the same reference numerals and description thereof will be omitted.

As shown in the drawing, the receiving member 52 is provided with a groove-shaped receiving seat 55 on the horizontal shaft 65a of the bracket 65 which is arranged at a predetermined portion of the horizontal base portion 12a by fastening means such as bolts. Is rotatably arranged. Therefore, the third support leg 15 can easily adjust the mounting angle of the lance 11 about the horizontal shaft 65a by moving up and down the first and second receiving members 50 and 51. Further, as shown in FIGS. 6, 9 and 10, the oxygen supply pipe 16 of the lance 11 and the cooling water supply / discharge pipes 17, 18 are provided on one side (the upper side in FIG. 6) of the horizontal base portion 12a. ,
An oxygen supply port connection portion 66 and a cooling water supply / discharge port connection portions 67 and 68, which are connected to each other, are arranged in parallel.

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

At the lower end of the large-diameter flange 75, a flange 77 for locking a bracket 82 of a clamp mechanism 81, which will be described later, is arranged. At the lower end of the flange 77, a short pipe 71 and a flexible tube are provided. A cylindrical cylinder 76 that surrounds a part of 70 is provided.
Further, as shown in FIGS. 9 and 10, at the upper end of the flange 79 provided at the lower end of the flexible tube 70, a cylindrical small-diameter cylinder 78 that surrounds most of the flexible tube 70 is provided. Has been done. The cylinders 76 and 78 are arranged with a predetermined gap in the upper and lower directions with a proper gap in the radial direction.
The inner peripheral surface of the opposing cylinder 76 and the cylinder 78
Sliding members 80 made of a metal such as iron or polyamide or the like are arranged in close contact with each other on the outer peripheral surfaces of the above so as to fill the gap.

Therefore, when the oxygen supply pipe 16 and the oxygen supply port connection 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, the flexible tube 70 shrinks), there is no risk of oxygen leaking vigorously. In addition, on the outer peripheral surface of the cylinder 76, a pair of clamp mechanisms 81 are provided at the peripheral portions facing each other by 180 °.
Is provided. Here, the above-mentioned clamp mechanism 81
This will be described in detail with reference to FIGS. 6, 9, and 10. As shown in FIGS. 9 and 10, on the outer peripheral surface of the cylinder 76, a vertically long and slender bracket 82 is arranged with its upper end abutting on the flange 77. A hook-shaped clamp claw 83 is disposed on the upper portion of the bracket 82 so as to be rotatable around the upper pivot 82a.

On the other hand, below the bracket 82, a cylinder 84 using nitrogen gas as a working fluid is arranged rotatably around a lower pivot 82b. The tip of the rod 84a of the cylinder 84 is connected to the rear end of the clamp claw 83 by the pivot 82c. Therefore, by driving the cylinder 84, the cylinder 84 can be freely moved to the unclamped state shown by the chain double-dashed line in FIG. 10 or the clamped state shown by the solid line in FIG.

9 and 10, reference numeral 85 is a cover such as a bellows that covers the rod 84a of the cylinder 84, and reference numeral 86 in FIGS. 6 to 9, 11, and 12 is the horizontal base portion 1.
It is a cushioning material such as rubber laid on 2a. In addition, as shown in FIGS. 6, 11, and 12, a device for automatically fixing the lance 11 has failed at the peripheral edge portions facing each other by 180 ° about the axis of the lance 11 on the horizontal base portion 12a. In this case, a pair of lance fixing means 8 for temporarily fixing the lance 11
7 are provided.

Here, the above-mentioned lance fixing means 87 will be described in detail. As shown in FIG. 12, the lance 11
A notch 88 having a substantially rectangular shape in plan view is formed in a predetermined portion of the pair of support plates 37a. On the other hand, this cutout 8
A long rod-shaped bracket 89 is erected on a predetermined portion of the horizontal base portion 12 a facing the position 8. This bracket 89
An opening 89a into which the wedge 90 is fitted is formed in this, so that when the lance 11 is inserted and held in the lifting table 12, as shown in FIG. Can be fixed.

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

At this time, each supporting leg 15 and each receiving member 50 to 5
It is possible to perform the alignment only by suspending and inserting while confirming the position of 2 (that is, without confirming the positions of the connecting fittings 19 and the connecting portions 66 to 68). Further, since the taper fitting 47 is attached to each connecting fitting 19, even if the axis of each connecting fitting 19 and the axis of each connecting portion 66 to 68 are slightly deviated from each other, they are coaxial with each other. You can make adjustments. Then, when the lance 11 is completely inserted, the flexible tube 70 and the coil spring 46 are slightly depressed (i.e., compressed) downward, so that the connection can be achieved with a good sealing property.

Next, the cylinder 57 is driven to fix each supporting leg 15 with the cotter 58, and the cylinder 84
After the connection fitting 19 and the connection parts 66 to 68 are clamped by driving, the first and second receiving members 50 and 51 are adjusted while observing the positional relationship between the lance insertion port 32 and the lance tube 13. Center it. As a result, it is possible to reliably prevent the lance 11 from swinging due to the acid supply or the water supply during the refining operation. Then, after this work is finished, each winch 22 is driven to lower the lift 12 at the start of refining.
At this time, when the lift 12 or the lance tube 13 descends to a predetermined position, a hole cone (not shown) of the lance insertion port 32 is opened, and the lance tube 13 is further connected to the lance insertion port 32.
And is brought close to the hot metal in the converter 20 via.

Then, from an oxygen supply device (not shown), through the oxygen supply port connection portion 66 and the oxygen supply pipe 16,
Oxygen is blown into the converter 20 to make steel. Then, when the refining operation is completed after a predetermined time has passed, the lance pipe 13 is moved up by performing an operation substantially opposite to the above. During this time, the cooling water circulation device (not shown) returns to the cooling water circulation device via the cooling water supply port connection portion 67, the cooling water supply 17, the cooling water passage 14b, the cooling water discharge pipe 18, and the cooling water discharge port connection portion 68. It goes without saying that the cooling water is circulated to prevent melting damage of the lance 11 and the like.

The embodiment of the present invention has been described above.
The present invention is not limited to these embodiments, and changes in conditions and the like without departing from the spirit are all within the scope of application of the present invention. For example, in the present embodiment, the oxygen supply port 16a and the cooling water supply / discharge port 17 are arranged from the upper surface of the lift table.
The heights up to a and 18a are almost the same, but the heights can be different. Further, although each support leg 15 of the lance 11 is provided horizontally from the lance 11, it is also possible to attach the support legs 15 at an angle. Further, 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 the. In addition,
The present invention is applicable when the oxygen supply pipe 16 is replaced with the cooling water discharge pipe and the cooling water discharge pipe 18 is replaced with the oxygen supply pipe in the above-described embodiment (FIG. 9).

[0045]

As is apparent from the above description, in the lance device according to the first to third aspects, the mounting angle of the lance (in other words, with respect to the lance insertion port) is raised by elevating at least two receiving members, for example. The inclination angle of the lance) can be easily changed, and as a result, the lance tube can be easily centered. Therefore, conventionally,
Since it is not necessary to insert one or several shims appropriately in the gap between the lance mounting portion of the lift table and the lance tube in accordance with the direction and the amount of misalignment of the lance tube with respect to the lance insertion port, the work can be omitted. It is possible to improve the sex.

Particularly, in the lance device according to the second aspect, the oxygen supply port and the cooling water supply / exhaust port are closely connected to the oxygen supply port connection part and the cooling water supply / exhaust port connection part by the weight of the lance. In addition, since the clamp mechanism is provided, more reliable connection can be performed.
In the lance device according to claim 3, since each supporting leg is fixed by the cotter, the lance is prevented from falling,
Workability and safety can be improved.

[Brief description of drawings]

FIG. 1 is an explanatory view of a lance device according to an embodiment of the present invention and a converter equipment suitably using the lance device.

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

FIG. 3 is a front view showing the overall structure of a lance.

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

FIG. 5 is a plan view of a lance.

FIG. 6 is a plan view showing the overall structure of a lifting table.

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

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

FIG. 9 is an explanatory diagram showing an overall configuration of a lifting table.

FIG. 10 is a cross-sectional view of essential parts of an oxygen supply pipe and an oxygen supply port connection portion.

FIG. 11 is a plan view of a main part of a lift table.

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

FIG. 13 is an explanatory diagram of centering work of the lance device according to the conventional example.

[Explanation of symbols]

10 Lance device 11 Lance 12 Elevating table 12a Horizontal table part 12b Lance mounting part 12c Opening part 12d Opening part 13 Lance tube 14 Core bar 14a Oxygen passage 14b Cooling water passage 15 Supporting leg 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 Column 22 Winch (elevating means) 22a Wire drum 23 Rail 24 Traveling vehicle 25 Hoist winch 26 Wire rope 27 Guide sheave 28 Support part 29 Ceiling sheave 30 Dust collection hood 31 Flue 32 Lance insertion port 33 Guide roller 33a Guide roller 34 Guide rail 34a Guide rail 35 Support part 36 Sheave 37 Trapezoidal rib 37a Support plate 37b Small diameter support plate 38 Hook part 39 Support part 40 foot 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 shaft 54 bracket 55 receiving seat 55a lateral hole 56 guide 57 cylinder (advancing / retreating drive means) 57a rod 58 cotter 59 screw jack 59a rod 60 brake geared motor 61 lance mounting angle adjusting means 62 presser foot Metal fitting 63 Limit switch 64 Bracket 65 Bracket 65a Horizontal shaft 66 Oxygen supply port connection part (connection part) 67 Cooling water supply port connection part (connection part) 68 Cooling water discharge port connection part (connection part) 69 Fixed piping 70 Frame Sibble 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 Pivot 83 Clamp claw 84 Cylinder 84a Rod 85 Cover 86 Buffer material 87 Lance fixing means 88 Notch 89 Bracket 89a Opening 90 Wedge 91 Working deck

─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Takeshi Tsukahara 1-1, Tobata-cho, Tobata-ku, Kitakyushu City, Fukuoka Prefecture Nippon Steel Co., Ltd. Inside Yawata Works (72) Inventor Takaaki Mine Tobata-ku, Tobata-ku, Fukuoka Prefecture No. 1 in Machi Nippon Steel Co., Ltd., Yawata Works (72) Inventor, Toyoharu Suenaga No. 1, Tsukiji-cho, Yawatanishi-ku, Kitakyushu, Fukuoka (72) Takata Industry Co., Ltd. Takata Industry Co., Ltd. 1-1 Tsukiji-cho, Hachiman-nishi-ku, Yokohama (72) Inventor Koichi Ono 1-1 Tsukiji-machi 1-1, Tsukiji-machi, Kitakyushu, Kitakyushu, Fukuoka (72) Inventor Tetsuo Karaki Yawata, Kitakyushu, Fukuoka Takada Industry Co., Ltd. 1-1 Tsukiji-cho, Nishi-ku (58) Fields investigated (Int.Cl. ⁷ , DB name) F27D 7/02 C21C 5/46 101

Claims (3)

(57) [Claims] 1. A first to a third support leg formed on the periphery of the upper portion, an oxygen supply pipe bent at the upper portion and directed downward at an off-axis position, and a cooling water supply / discharge pipe. A lance device for removably supporting a lance on an elevator having a lance mounting portion made of a U-shaped cutout, the lance device being mounted radially around the lance and having the supporting legs mounted thereon. Lance mounting angle adjusting means for changing the mounting angle of the lance by raising and lowering at least two, and the oxygen supply pipe and the cooling water supply and discharge pipes, respectively, are arranged to face each other, It has an oxygen supply pipe and an oxygen supply port connection part that seals with each end of the cooling water supply and discharge pipe by descending due to the weight of the lance, and a cooling water supply and discharge port connection part. Doing things Lance apparatus according to claim. 2. The oxygen supply port connection part and the cooling water supply / discharge port connection part are the oxygen supply port connection part, the cooling water supply / discharge port connection part, the oxygen supply pipe, and the oxygen supply pipe. The lance device according to claim 1, further comprising a clamp mechanism for clamping each end of the cooling water supply and discharge pipes. 3. Each of the receiving members has a groove-shaped receiving seat, and the groove side portions are moved forward and backward in the horizontal direction, and are fitted into the lateral holes formed in the groove side portions, so as to correspond to the corresponding support legs. The lance device according to claim 1 or 2, further comprising a cotter having an advancing / retreating drive means for fixing the lance.