JPH0638105Y2 - Converter furnace body support device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a converter furnace body supporting device for supporting a furnace body of a converter on a trunnion ring.

[Conventional technology]

Conventionally, in this type of converter furnace body supporting device, it is possible to withstand long-term use and reliably support the furnace body, thermal expansion of the furnace body due to thermal influence during refining, and unevenness of the furnace body resulting from long-term use. It is necessary to be able to absorb the aged deformation so that unreasonable force other than the load of the furnace body does not act on the support mechanism, and also to support surely and stably even when the furnace body is tilted, and it is inserted and arranged in the trunnion ring. A supporting flange is provided on the outer peripheral portion of the converter furnace body above the trunnion ring, and a connecting and supporting mechanism is provided between the supporting flange and the trunnion ring (for example, JP-B-53-45163 and JP-A-58-71320). (See the official gazette).

The converter furnace body support device described in JP-B-53-45163 discloses a support bolt boss having a boss at one end of a screw shaft, which is pin-coupled to an upper portion of a trunnion ring, and which is attached to the screw shaft of the support bolt. The upper and lower spherical slide bodies that clamp the support flange provided on the outer peripheral portion of the furnace body are tightened.

The converter furnace body supporting device described in JP-A-58-71320 is provided with a convex spherical seat in the opposing direction on the lower flange upper surface of the trunnion ring and the supporting flange lower surface provided on the outer peripheral portion of the furnace body. In addition, a concave spherical seat is provided on the lower surface of the lower flange and the upper surface of the support flange of the trunnion ring, and a cylindrical support member penetrating the upper flange of the trunnion ring is interposed between the convex spherical seat and the convex spherical surface. A seat, a concave spherical seat, a support flange, and a support member, and support bolts penetrating them through in a loosely fitted state, and end fixing hardware attached to the ends of the respective support bolts to make a spherical sliding contact with the concave spherical seat. It clamps and is joined by.

[Problems to be solved by the device]

In the former converter furnace body support device, when the support flange moves in the pin axis direction due to the deformation of the furnace body, the support bolt slides on the pin by the gap between the support flange and the pin support device (bracket) to deform the furnace body. Although it can be absorbed, the gap cannot be made too large due to the problem of the strength of the pin, so that the movement amount of the support flange is limited, and the absorption capacity for the deformation of the furnace body is not sufficient. It is difficult to absorb the furnace body deformation in directions other than the circumferential direction and the axial direction of the pin. Further, when the boss hole of the support bolt and the pin are slidingly worn, there is play. If this backlash (excessive gap) occurs, the furnace body moves inside the trunnion ring when the furnace body and the trunnion ring are tilted, causing an impact, which not only makes workers uneasy, but also from the support surface of supporting strength. There was an inconvenience that it was not desirable.

In the latter converter furnace body support device, the support member sandwiched between the convex spherical seats is cylindrical and long in the vertical direction, and there is a risk of buckling when the load of the furnace body acts, and Since the inclination angle of the supporting member becomes large due to the relative displacement in the horizontal direction between the contact sliding surfaces of the end and the convex spherical seat, there is a problem in the supporting surface of the supporting strength of the furnace body. Further, since the supporting member penetrates the upper flange of the trunnion ring, the supporting member is not tilted largely due to the size of the penetrating portion, and there is a possibility that the absorption capacity for the deformation of the furnace body may not be sufficient. there were.

[Purpose of device]

This invention is based on the finding that the spherical sliding mechanism is vertically stacked in four stages, so that even if the supporting member between the convex spherical seats is short, it is possible to effectively cope with the movement of the supporting flange due to the deformation of the furnace body. This is to solve the problem of the latter converter furnace body supporting device, and an object thereof is to improve durability while maintaining smoothness of deformation absorption.

[Means for Solving the Problems] As shown in the drawings, the present invention provides a support flange 5 on an outer peripheral portion of a converter furnace body 4 inserted and arranged in a trunnion ring 1 above the trunnion ring 1, and supports the support flange 5. In the converter furnace body supporting device for supporting the furnace body 4 on the trunnion ring 1 via the flange 5, the trunnion ring 1
The pedestal 10 is provided on the upper part of the
Convex spherical seats 11A and 11B are provided in the opposite direction to the lower surface of the support flange 5 provided on the outer peripheral portion of the base, and concave spherical seats 12A and 12B are provided to the lower surface of the pedestal 10 and the upper surface of the support flange 5 to provide the convex surface. A support block 13 whose upper and lower surfaces are concave spherical surfaces is interposed between the spherical spherical seats 11A and 11B, and the convex spherical seats 11A and 11B are provided.
B, concave spherical seats 12A, 12B, support flange 5, pedestal 10, and support block 13 are loosely fitted and penetrated through these support bolts.
14 and end fixing hardware 15A, 15B that is attached to the ends of the respective support bolts 14 and is in spherical contact with the concave spherical seats 12A, 12B.
It is characterized in that they are squeezed and joined by means of and, and the above-mentioned object is achieved by such a constitution.

〔Example〕

 An embodiment of the present invention will be described below with reference to the drawings.

In the figure, 1 is a trunnion ring, and this trunnion ring 1
A pair of trunnion shafts 2 are provided so as to project outward on an axis line that is perpendicular to the center line. The trunnion ring 1 is supported by the bearing 3 via the trunnion shaft 2.
Is tiltable.

Reference numeral 4 denotes a converter furnace body which is coaxially inserted and arranged in the trunnion ring 1, and a support flange 5 is provided on an outer peripheral portion of the furnace body 4 above the trunnion ring 1. In the embodiment, the space between the support flange 5 and the trunnion ring 1 is 30 in the directions opposite to each other from the trunnion axis in a plan view.
Connections are made at three positions of 90 ° and 90 ° by a support connection mechanism 6 described later.

The furnace body 4 is provided with a pair of tilting brackets 7 projecting above and below the trunnion axis with the trunnion ring 1 interposed therebetween.
A gap 8 is provided between the trunnion ring 1 and
Stoppers 9 facing the circumferential direction of the trunnion ring 1 are provided on the upper and lower surfaces with the tilting bracket 7 interposed therebetween, and these stoppers 9 can move the furnace body 4 in a direction perpendicular to the trunnion axis when tilting. Further, the tilting bracket 7 allows the tilting torque to be transmitted to the furnace body 4 via the support flange 5.

The supporting and connecting mechanism 6 is provided with an inverted U-shaped pedestal 10 in a side view on the upper part of the trunnion ring 1 by means of end legs 10a.
Convex convex spherical seats 11A and 11B are provided on the upper surface of the support flange 5 and the lower surface of the support flange 5, and the lower surface of the pedestal 10 and the support flange 5 are provided.
The concave spherical seats 12A and 12B are provided on the upper surface of the
Between A and 11B, a support block 13 whose upper and lower surfaces are concave spherical surfaces
And the convex spherical seats 11A and 11B, the concave spherical seats 12A and 12B, the support flange 5, the pedestal 10 and the support block 13 through which these are loosely fitted, and the support bolts 14 and 14 respectively. The concave spherical seats 12A, 1 attached to the ends
The end fixing metal parts 15A and 15B, which are in spherical contact with the spherical surface 2B, are sandwiched and bonded.

The upper and lower surfaces of the support block 13 slidably contact the convex spherical seats 11A and 11B, and the sliding surface 16 of the support block 13 and the convex spherical seat 11A is located above the axial center line of the support bolt 14. The support block 13 and the sliding surface 17 of the convex spherical seat 11B are formed into a spherical surface having a spherical center, and the spherical surface having a spherical center at the lower position on the axial center line of the support bolt 14.

The sliding surface 18 of the concave spherical seat 12A and the end fixing hardware 15A is formed as a spherical surface concentric with the sliding surface 16, and the sliding surface 19 of the concave spherical seat 11B and the end fixing hardware 15B slides as described above. It is formed as a spherical surface concentric with the surface 17.

The support bolt 5, the pedestal 10, the convex spherical seats 11A and 11B, the concave spherical seats 12A and 12B, and the support block 13 are provided at the central portions thereof with support bolts having openings larger in diameter than the support bolts 14 formed therein. 14 is loosely fitted, and a gap 2 is
0, 21, 22, 23, 24, 25, 26 are provided.

In the above configuration, when the furnace body 4 is upright, the furnace body load is supported by the trunnion ring 1 via the support flange 5, the convex spherical seat 11A, the support block 13, the convex spherical seat 11B, and the pedestal 10, Tilt bracket 7A and trunnion ring 1
Since there is a gap 8 therebetween, the trunnion ring 1 is not supported via the upper tilting bracket 7A.

When the furnace body 4 is tilted, the furnace body load and the tilting moment are distributed and supported by the support flange 5 and the tilting bracket 7 in accordance with the tilting angle.

When the furnace body 4 is inverted, the load of the furnace body is such that the support bolt 14 has a tensile force, the support flange 5, the concave spherical seat 12A, the end fixing hardware 15, the support bolt 14, the end fixing hardware 15B, and the concave spherical seat 12B. The trunnion ring 1 is supported via the pedestal 10, and the trunnion ring 1 is not supported via the lower tilting bracket 7B because there is a gap 8 between the lower tilting bracket 7B and the trunnion ring 1.

When the furnace body 4 is deformed non-uniformly due to the heat effect during refining and aged use, or when the furnace body 4 and the trunnion ring 1 are mutually non-uniformly deformed, the support flange 5 is pushed to the top of the trunnion ring 1. It moves parallel to the pedestal 10 provided, and the upper portion of the support bolt 14 is pushed by the support flange 5. Therefore, the support bolt 14 has the support flange 5 in which it is loosely fitted, the pedestal 10, the convex spherical seats 11A and 11B, the concave spherical seats 12A and 12B, and the clearances 20 and 21 in the support block 13.
After moving for 22, 23, 24, 25, and 26 minutes, and the movement is blocked by each opening wall, convex spherical seat 11A and support block 1
3, the concave spherical seat 12A and the end fixing hardware 15A are sliding surfaces 16 and 1, respectively.
8, and the concave spherical seat 12B and the end fixing hardware 15B, the convex spherical seat 11B and the support block 13 slide on the sliding surfaces 17 and 19, respectively. Therefore, regardless of the direction of the furnace body deformation, the support bolt
As shown in FIG. 5, 14 is inclined toward the pushing direction side by the angle θ to absorb the non-uniform deformation of the furnace body 4, and the supporting and connecting mechanism 6
There is no unreasonable force other than the load on the furnace body, and the gaps 20, 21, 22, 23, which exist between the support bolt 14 and each member,
The inclination angle θ of the support bolt 14 is reduced by 24, 25 and 26. Moreover, the support block 13 interposed between the convex spherical seats 11A and 11B is short in the vertical direction and does not cause the problem of buckling, and the support flange 5 connected by the support connecting mechanism 6 is used.
And the distance between the trunnion ring 1 (interval l shown in Fig. 5)
Becomes smaller. Therefore, even if the convex spherical seats 11A and 11B are largely displaced in the horizontal direction, the influence of the displacement is small, so that the load of the furnace body is more reliably supported.

When wear occurs between the members of the support connecting mechanism 6 (sliding surfaces 16, 17, 18, 19), looseness due to wear can be easily removed by retightening the upper and lower end fixing hardware 15A, 15B.

In the embodiment, the convex spherical seats 11A and 11B and the concave spherical seat 12 are used.
A and 12B are fixed to the support flange 5 and the pedestal 10, respectively, but a ring is integrally provided on the support flange 5 and the pedestal 10, and convex spherical seats 11A, 11B and a concave spherical seat are provided in the ring.
The same effect can be obtained by fitting and locking 12A and 12B.

[Effect of device]

As described above, according to the present invention, the support is provided by stacking the spherical slide mechanisms of four stages in total, two stages each on the furnace body side (support flange side) and the trunnion ring side (pedestal side) via the support blocks short in the vertical direction. Since the support flange and the trunnion ring are connected by the connecting mechanism and the connecting distance is shortened, a connecting structure with high rigidity can be obtained. Further, even if the support flange is relatively displaced with respect to the trunnion ring, the inclination angle of the support bolt can be reduced by the gap existing between the support bolt and each member, so that the furnace body load can be reliably supported. In addition, it is possible to smoothly and largely absorb the non-uniform deformation of the furnace body and the non-uniform deformation of the furnace body and trunnion due to the influence of heat during refining and long-term use, and the durability can be improved.

[Brief description of drawings]

1 and 2 are a plan view and a right side view showing an embodiment of the present invention, FIG. 3 is a sectional view taken along the line A to FIG. 1 showing an essential part of the embodiment, and FIG. FIG. 3 is an enlarged detailed view of FIG. 3, and FIG. 1 ... Trunnion ring, 4 ... Furnace body, 5 ... Support flange, 6 ... Support coupling mechanism, 7 ... Tilt bracket, 9 ... Stopper, 10 ... Stand, 11A, 11B ... Convex shape Spherical seat, 12A, 12B …… Concave spherical seat, 13 …… Support block, 14 …… Support bolt, 15A, 15B …… End fixing hardware, 16,17,18,19 …… Sliding surface, 8,20 , 21, 22, 23, 24,
25, 26 …… Gap.

Claims (1)

[Scope of utility model registration request] 1. A converter furnace in which a supporting flange is provided on an outer peripheral portion of a converter furnace body inserted and arranged in a trunnion ring above a trunnion ring, and the furnace body is supported on the trunnion ring via the supporting flange. In the body supporting device, a pedestal is provided on the upper part of the trunnion ring, and a convex spherical seat is provided in a facing direction on an upper surface of the pedestal and a lower surface of a support flange provided on the outer peripheral portion of the furnace body, and a lower surface of the pedestal. And a concave spherical seat on the upper surface of the support flange, and between the convex spherical seat, a support block whose upper and lower surfaces are concave spherical surfaces is interposed, and the convex spherical seat, concave spherical seat, support flange,
The pedestal and the support block are clamped and joined by the support bolts that are loosely fitted through the support bolts and the end-fixing hardware that is attached to the ends of the support bolts and that is in spherical contact with the concave spherical seat. Characteristic converter furnace body support device.