CN219907751U - Centering and connecting device for furnace bottom and furnace body of movable furnace bottom converter - Google Patents

Abstract

The utility model discloses a centering and connecting device for a converter bottom and a converter body of a movable converter bottom, relates to the technical field of converter steelmaking equipment, and aims to solve the problem of difficulty in centering and connecting the converter bottom and the converter body; the utility model comprises a plurality of lower hanging brackets, a plurality of upper hanging brackets, a lifting assembly and a connecting assembly, wherein the lower hanging brackets correspond to the upper hanging brackets in number and position one by one, the lifting assembly comprises an upper pin shaft, a lower pin shaft and a steel wire rope, the length between the upper pin shaft and the lower pin shaft of the lifting assembly is larger than the sum of the distance from the lower end of a vertical groove to a furnace bottom flange in the vertical direction and the distance from the lower end of the horizontal part of a T-shaped groove to a furnace body flange in the vertical direction, the connecting assembly comprises a furnace bottom lifting pin and an inserting wedge, the lower part of the furnace bottom lifting pin is provided with a pin hole for inserting the inserting wedge, and the inserting wedge is provided with a plurality of locking holes for penetrating bolts so as to enable the inserting wedge and the furnace bottom lifting pin to be positioned in the horizontal direction; the utility model has simple structure, convenient use and low manufacturing cost, and can save the centering time and reduce the labor intensity.

Description

Centering and connecting device for furnace bottom and furnace body of movable furnace bottom converter

Technical Field

The utility model relates to the technical field of converter steelmaking equipment, in particular to a centering and connecting device for a converter bottom and a converter body of a movable converter bottom.

Background

The converter steelmaking has the advantages of high production efficiency, multiple varieties, good quality, high heat efficiency, good raw material adaptability, low consumption, low cost, low capital investment, high construction speed and the like, and is widely adopted by the domestic and foreign steel smelting industry, thereby becoming one of the main methods of modern steelmaking. Because the converter performs extremely complex and intense physical and chemical reactions and mechanical movements in the converting process, the converter lining is easily corroded and damaged in use under the influence of high temperature and severe conditions. When the working layer of the converter lining is corroded to the residual thickness of about 100mm, the lining is replaced, otherwise, the cost of maintaining the refractory material under the furnace condition is increased, and steel leakage accidents are extremely easy to occur. In general, a converter with the nominal volume smaller than 100t is built in a split type, namely, the furnace bottom and the furnace body are built separately, the standby furnace bottom can be built in advance before the furnace is stopped, and after the furnace body is built, the furnace bottom is connected with the furnace body, so that the furnace stopping building time can be shortened, and the operation rate of the converter is improved.

The traditional connection mode of the furnace bottom and the furnace body is that firstly, the built furnace bottom is arranged on a furnace bottom roof lifting tray; then, according to the marks made before the furnace bottom and the furnace body are disassembled, the furnace bottom is lifted up through the furnace bottom vehicle in a rotating way, so that the furnace bottom is centered with the furnace body hanger; and finally, firmly connecting the furnace bottom and the furnace body together through a furnace bottom pin to finish the connection work of the furnace bottom and the furnace body. However, in the actual production process, the connecting hanger of the furnace bottom and the furnace body cannot be quickly and accurately centered, so that the problems of long time consumption and low butt joint efficiency exist. In addition, the annular gap with the thickness of 20-30mm exists between the connected furnace bottom and the furnace body flange, so that the furnace bottom pin is frequently loosened in the later stage of the furnace service, and the furnace bottom pin must be fastened regularly; and in the furnace type control process, particularly when the furnace bottom height is lowered, the joint part has the risk of steel leakage. Thus, there is a need for a means for centering and connecting the bottom of a living hearth converter to the shaft that addresses this problem.

Disclosure of Invention

The utility model aims to provide a centering and connecting device for a furnace bottom and a furnace body of a converter with a movable furnace bottom, which aims to solve the problem of difficult centering and connecting of the furnace bottom and the furnace body.

In order to achieve the above purpose, the present utility model provides the following technical solutions: the centering device comprises a furnace bottom and a furnace body of a movable furnace bottom converter, wherein flanges are respectively and fixedly arranged at the upper end of the furnace bottom and the lower end of the furnace body, the centering device comprises a plurality of lower hangers which are positioned at the periphery of the furnace bottom and are fixedly arranged below the furnace bottom flanges, a plurality of upper hangers which are positioned at the periphery of the furnace body and are fixedly arranged above the furnace body flanges, and lifting assemblies, wherein the lower hangers and the upper hangers are in one-to-one correspondence in number and positions, the lifting assemblies comprise upper pin shafts, lower pin shafts and steel wire ropes for connecting the two pin shafts, a vertical groove with the open upper end and the open lower end is formed in one side of the lower hanger, the lower end of the vertical groove is used for horizontally clamping the lower pin shaft, a T-shaped groove with the open lower end is formed in one side of the upper hanger, which is far away from the furnace body, the horizontal part of the T-shaped groove is used for clamping the upper pin shafts, and the vertical groove of the T-shaped groove is used for passing through the steel wire ropes; the length between the upper pin shaft and the lower pin shaft of the lifting assembly is larger than the sum of the distance from the lower end of the vertical groove to the furnace bottom flange in the vertical direction and the distance from the lower end of the horizontal part of the T-shaped groove to the furnace body flange in the vertical direction.

Preferably, the two ends of the steel wire rope are provided with rings fixed by aluminum alloy pressing slings, and the two rings are respectively sleeved at the middle parts of the upper pin shaft and the lower pin shaft.

The utility model provides another technical scheme that: the utility model provides a live stove bottom converter bottom and furnace body connecting device, wherein stove bottom upper end and furnace body lower extreme have set firmly the flange respectively, including a plurality of lower cradles that are located the stove bottom periphery and set firmly in furnace bottom flange below, a plurality of last cradles that are located the furnace body periphery and set firmly in furnace body flange top, coupling assembling, the quantity and the position one-to-one of lower cradles and last cradles are the connection assembling includes stove bottom lifting pin and inserts the wedge, the pinhole that is used for inserting the wedge has been seted up to stove bottom lifting pin lower part, a plurality of locking hole has been seted up on the wedge for wear to establish the bolt in order to make insert wedge and stove bottom lifting pin location in the horizontal direction, the T-shaped groove that the lower extreme was opened has been seted up to the one side that the upper cradle kept away from the furnace body, the horizontal part of T-shaped groove is used for the card to establish stove bottom lifting pin end cap, the vertical groove that upper end that upper and lower extreme was opened has been seted up down, the vertical groove lower extreme is used for the card to establish the wedge with the wedge in order to make insert wedge and stove bottom lifting pin location in vertical direction, be used for passing through the straight-bar portion of lifting pin in the vertical groove and the T-shaped groove.

Preferably, the connecting assembly further comprises a locking clamping plate, wherein a long slot hole is formed in the locking clamping plate, a bolt penetrates through the long slot hole to fixedly connect the locking clamping plate with the insertion wedge, and one end of the locking clamping plate is propped against the furnace bottom lifting pin.

Preferably, the upper edges of the wedge and the pin hole are horizontal edges, the lower edges are oblique edges and have the same slope, and the locking hole is formed at one side close to the oblique edge of the wedge.

Preferably, in the above solutions, the lower end surface of the horizontal portion of the T-shaped groove is provided with a countersunk groove at the periphery of the upper end of the vertical portion, and the countersunk groove comprises a circular groove and a long groove, and the middle parts of the circular groove and the long groove are opposite to the upper end of the vertical portion of the T-shaped groove.

Preferably, in the above schemes, the lower hanger and the upper hanger are respectively welded and fixed with the bottom and the furnace body.

Compared with the prior art, the utility model has the beneficial effects that:

1. according to the centering device for the furnace bottom and the furnace body of the movable furnace bottom converter, the newly built furnace bottom and the furnace body are centered and aligned in a flexible connection mode, and meanwhile, the self weight of the newly built furnace bottom is utilized to realize the rapid and accurate centering and alignment of the furnace bottom and the furnace body, so that the service overhaul period of the furnace can be effectively saved. Compared with the conventional centering and aligning method, the centering and aligning time of the furnace bottom and the furnace body can be saved by 30-60 min.

2. This converter bottom of living stove converter and furnace body connecting device inserts the degree of depth of furnace bottom pin lower extreme locking slot through the adjustment and inserts the wedge, can effectively with stove bottom and furnace body firm in connection, simultaneously, inserts the wedge on the interval distribution locking hole, uses with locking cardboard and bolt cooperation, can prevent effectively that the wedge from loosening and droing, and then improves the steadiness that stove bottom and furnace body are connected, need not the timing fastening furnace bottom pin, effectively reduces intensity of labour.

3. The centering and connecting device for the converter bottom and the converter body of the movable converter bottom has the advantages of simple structure, convenient use and low manufacturing cost.

Drawings

FIG. 1 is a schematic diagram of a front view of a centering device according to the present utility model;

FIG. 2 is an enlarged view of FIG. 1 at A;

FIG. 3 is a schematic cross-sectional view of the upper hanger in the direction H-H in FIG. 2;

FIG. 4 is a schematic side view of the wire rope portion of the centering device of FIG. 1;

FIG. 5 is a schematic diagram of a front view of a connecting device according to the present utility model;

FIG. 6 is an enlarged view at B in FIG. 5;

FIG. 7 is a schematic cross-sectional view of the furnace bottom suspension pin of the connecting device of FIG. 5;

FIG. 8 is a schematic view of the insertion wedge of the connecting device of FIG. 5;

fig. 9 is a schematic structural view of a locking clip of the connecting device shown in fig. 5.

In the figure: 1. a furnace bottom; 2. a lower hanging bracket; 3. a hanging bracket is arranged; 31. a circular groove; 32. an elongated slot; 4. a furnace body; 5. a furnace bottom lifting pin; 6. inserting a wedge; 7. locking the clamping plate; 8. a bolt; 9. an upper pin shaft; 10. pressing a sling by using an aluminum alloy; 11. a wire rope; 12. a lower pin shaft; 13. a pin hole; 14. locking holes.

Detailed Description

As shown in fig. 1 and 2, a centering device for a furnace bottom and a furnace body of a living furnace bottom converter is provided, wherein flanges are respectively and fixedly arranged at the upper end of the furnace bottom 1 and the lower end of the furnace body 4, and the centering device comprises a plurality of lower hangers 2 which are positioned at the periphery of the furnace bottom 1 and fixedly arranged below the flanges of the furnace bottom 1, a plurality of upper hangers 3 which are positioned at the periphery of the furnace body 4 and fixedly arranged above the flanges of the furnace body 4, and lifting assemblies, the number and positions of the lower hangers 2 are in one-to-one correspondence with those of the upper hangers 3, the lifting assemblies comprise an upper pin 9, a lower pin 12 and a steel wire rope 11 for connecting the two pins, and referring to fig. 4, both ends of the steel wire rope 11 can be provided with rings fixed through aluminum alloy pressing slings 10, the two rings are respectively sleeved at the middle parts of the upper pin 9 and the lower pin 12, and other modes, such as circular ring-shaped steel wire ropes and hooks can be adopted, or the upper pin 9, the steel wire rope 11 and the lower pin 12 can be made into a whole. A vertical groove with the upper end and the lower end open is formed in one surface of the lower hanging bracket 2 far away from the furnace bottom 1, the lower end of the vertical groove is used for horizontally clamping a lower pin shaft 12, a T-shaped groove with the lower end open is formed in one surface of the upper hanging bracket 3 far away from the furnace body 4, the horizontal part of the T-shaped groove is used for clamping an upper pin shaft 9, and the vertical grooves of the vertical groove and the T-shaped groove are used for passing through a steel wire rope 11; the length between the upper pin shaft 9 and the lower pin shaft 12 of the lifting assembly is larger than the sum of the distance from the lower end of the vertical groove to the flange of the furnace bottom 1 in the vertical direction and the distance from the lower end of the horizontal part of the T-shaped groove to the flange of the furnace body 4 in the vertical direction.

As shown in fig. 5, a device for connecting the bottom of a living converter with a furnace body is provided, wherein flanges are respectively and fixedly arranged at the upper end of the furnace bottom 1 and the lower end of the furnace body 4, the device comprises a plurality of lower hangers 2 which are positioned at the periphery of the furnace bottom 1 and fixedly arranged below the flanges of the furnace bottom 1, a plurality of upper hangers 3 which are positioned at the periphery of the furnace body 4 and fixedly arranged above the flanges of the furnace body 4, and a connecting assembly, wherein the lower hangers 2 are in one-to-one correspondence with the number and the positions of the upper hangers 3, the connecting assembly comprises a furnace bottom hanger 5 and an inserting wedge 6, the lower part of the furnace bottom hanger 5 is provided with a pin hole 13 for inserting the inserting wedge 6, the inserting wedge 6 is provided with a plurality of locking holes 14 for penetrating through bolts 8 to enable the inserting wedge 6 to be positioned with the furnace bottom hanger 5 in the horizontal direction, one side of the upper hangers 3 away from the furnace body 4 is provided with a T-shaped groove, the horizontal part of the T-shaped groove is used for clamping the end cap of the furnace bottom hanger 5, one side of the lower hangers 2 away from the furnace bottom 1 is provided with a vertical groove through the upper end and the lower end of the upper hanger 3, the vertical groove is used for clamping the upper end of the inserting wedge 6 and the vertical groove 6 in the vertical groove of the vertical wedge 5 in the vertical groove passing through the vertical groove 5 and the vertical groove 5 in the vertical groove.

In a preferred embodiment, the connecting assembly further comprises a locking clamping plate 7, as shown in fig. 9, on which an elongated slot is formed, a bolt 8 passes through the elongated slot to fixedly connect the locking clamping plate 7 with the wedge 6, and one end of the locking clamping plate 7 abuts against the bottom lifting pin 5, as can be seen in fig. 6; if the locking clamping plate 7 is not adopted, the position of the locking hole 14 is located at one side of the inserted wedge 6 after the inserted wedge 6 is completely inserted into the pin hole 13 as far as possible, and the inserted wedge 6 and the furnace bottom lifting pin 5 are positioned by using the bolts 8.

The insert wedge 6 and the pin hole 13 may be further specifically configured such that the upper sides are both horizontal sides, the lower sides are both oblique sides and have the same slope, and referring to fig. 7 and 8, the locking hole 14 is formed at a side close to the oblique side of the insert wedge 6.

In order to facilitate positioning, in the centering device and the connecting device, the lower end face of the horizontal part of the T-shaped groove can be provided with a countersunk groove at the periphery of the upper end of the vertical part, the countersunk groove comprises a circular groove 31 and a long groove 32, the middle parts of the circular groove 31 and the long groove 32 are opposite to the upper end of the vertical part of the T-shaped groove, and in particular, referring to fig. 3, the long groove 32 is overlapped with the center of the circular groove 31, the long groove 32 is mainly used for positioning the upper pin shaft 9, the circular groove 31 is mainly used for positioning the end cap of the bottom lifting pin 5, and of course, the upper end of the bottom lifting pin 5 can be matched with the long groove 32, even no matching is needed, as long as the upper pin shaft 9 and the bottom lifting pin 5 can be prevented from falling out of the T-shaped groove.

Alternatively, the lower hanger 2 and the upper hanger 3 are welded and fixed to the bottom 1 and the shaft 4, respectively.

Examples:

after the off-line furnace bottom is built, lifting the newly built furnace bottom to a furnace bottom roof lifting disk by adopting a crown block, and enabling the center of the furnace bottom roof lifting disk to coincide with the center of the newly built furnace bottom to ensure centering;

the centering and aligning technical scheme of the furnace bottom and the furnace body is as follows: firstly, placing a built furnace bottom on a furnace bottom roof disc, enabling the center of the furnace bottom roof disc to coincide with the center of a newly built furnace bottom, and dragging a furnace bottom vehicle carrying the newly built furnace bottom 1 to the position right below a furnace body by adopting a slag vehicle; then, starting a hydraulic pump, lifting a top plate of the furnace bottom vehicle at a speed of 0.3-0.6 m/min (for example, 0.5 m/min) through the operation of a lifting hydraulic cylinder, when a newly built furnace bottom 1 flange on the top plate of the furnace bottom vehicle is contacted with a furnace body 4 flange, keeping the hydraulic pressure of the hydraulic cylinder to be 14-16 MPa (for example, 15 MPa), enabling an operator to center the furnace bottom 1 and the furnace body 4 to align the device along the circumference of the furnace bottom and the furnace body flange, hanging an upper pin 9 into the upper hanging bracket 3, and hanging a lower pin 12 into the lower hanging bracket 2 through four upper hanging brackets and lower hanging brackets which are connected in diameter in horizontal and vertical directions; then, the top plate of the furnace bottom car is lowered at the speed of 0.3-0.6 m/min (for example, 0.5 m/min), and the furnace bottom 1 and the upper and lower hangers of the furnace body 4 can be self-aligned due to self-weight; finally, lifting the top disk of the furnace bottom vehicle at a speed of 0.3-0.6 m/min (for example, 0.5 m/min), and when a newly built furnace bottom 1 flange on the top disk of the furnace bottom vehicle is contacted with a furnace body 4 flange, maintaining hydraulic pressure of a hydraulic cylinder to be 14-16 MPa (for example, 15 MPa), and removing the 4 furnace bottom and furnace body centering and aligning devices by operators to finish centering and aligning the furnace bottom 1 and the furnace body 4.

The technical scheme for connecting and fixing the furnace bottom and the furnace body is as follows: after centering and aligning the furnace bottom 1 and the furnace body 4, an operator hangs the upper end of a furnace bottom pin 5 into an upper hanging bracket 3 and the lower end of the furnace bottom pin 5 into a lower hanging bracket 2 along a plurality of upper hanging brackets and lower hanging brackets which are uniformly distributed along the circumferential directions of flanges of the furnace bottom 1 and the furnace body 4; secondly, inserting the wedge 6 into the pin hole 13 at the lower end of each furnace bottom pin 5, and adjusting the insertion depth of the wedge 6 to realize the connection and fixation of the furnace bottom 1 and the furnace body 4; then, the clamping plate 7 is fixed with the locking hole 14 through the bolt 8 to realize the insertion wedge 6, so that loosening and falling are prevented, and the connection stability of the furnace bottom 1 and the furnace body 4 is further affected; the gaps on the circumferences of the flanges of the furnace bottom 1 and the furnace body 4 are welded by adopting electric welding, so that the influence of the seam on the circumferences of the flanges of the furnace bottom and the furnace body after connection on the later use of lining bricks of the converter can be further prevented, and particularly, when the height of the furnace bottom is lowered, the steel leakage production accident at the position is avoided; finally, the top plate of the hearth car is lowered at a speed of 0.3-0.6 m/min (for example, 0.5 m/min), and the hearth car is moved out, so that the connection work of the hearth 1 and the furnace body 4 is completed.

The above is only a preferred embodiment of the present utility model, but the scope of the present utility model is not limited thereto, and any changes or substitutions easily contemplated by those skilled in the art within the technical scope of the present utility model should be covered by the present utility model. Therefore, the protection scope of the present utility model should be defined by the claims.

The present utility model is not described in detail in the present application, and is well known to those skilled in the art.

Claims (9)

1. The utility model provides a living stove bottom converter stove bottom and furnace body centering device, wherein stove bottom (1) upper end and furnace body (4) lower extreme have set firmly flange, its characterized in that respectively: the lifting device comprises a plurality of lower lifting frames (2) which are positioned on the periphery of a furnace bottom (1) and fixedly arranged below a flange of the furnace bottom (1), a plurality of upper lifting frames (3) which are positioned on the periphery of a furnace body (4) and fixedly arranged above the flange of the furnace body (4), and lifting components, wherein the lower lifting frames (2) correspond to the upper lifting frames (3) in number and position one by one, each lifting component comprises an upper pin shaft (9), a lower pin shaft (12) and a steel wire rope (11) for connecting the two pins, a vertical groove with the open upper end and the open lower end is formed in one surface of the lower lifting frames (2) which is far away from the furnace bottom (1), a T-shaped groove with the open lower end is formed in one surface of the upper lifting frames (3) which is far away from the furnace body (4) in a horizontal clamping manner, and the horizontal parts of the T-shaped grooves are used for clamping the upper pin shafts (9), and the vertical grooves of the T-shaped grooves are used for passing through the steel wire ropes (11); the length between the upper pin shaft (9) and the lower pin shaft (12) of the lifting assembly is larger than the sum of the distance from the lower end of the vertical groove to the flange of the furnace bottom (1) in the vertical direction and the distance from the lower end of the horizontal part of the T-shaped groove to the flange of the furnace body (4) in the vertical direction.

2. The living hearth furnace hearth and shaft centering apparatus as defined in claim 1, wherein: the two ends of the steel wire rope (11) are provided with rings fixed through aluminum alloy pressing slings (10), and the two rings are respectively sleeved at the middle parts of the upper pin shaft (9) and the lower pin shaft (12).

3. The living hearth furnace hearth and shaft centering apparatus of claim 1 or 2, wherein: the lower end face of the horizontal part of the T-shaped groove is provided with a countersunk groove at the periphery of the upper end of the vertical part, the countersunk groove comprises a circular groove (31) and a long groove (32), and the middle parts of the circular groove and the long groove are opposite to the upper end of the vertical part of the T-shaped groove.

4. The living hearth furnace hearth and shaft centering apparatus of claim 1 or 2, wherein: the lower hanging bracket (2) and the upper hanging bracket (3) are respectively welded and fixed with the furnace bottom (1) and the furnace body (4).

5. The utility model provides a living stove bottom converter stove bottom and furnace body connecting device, wherein stove bottom (1) upper end and furnace body (4) lower extreme have set firmly flange, its characterized in that respectively: including a plurality of lower gallows (2) that are located stove bottom (1) periphery and set firmly in stove bottom (1) flange below, a plurality of last gallows (3) that are located stove body (4) periphery and set firmly in stove body (4) flange top, coupling assembling, the quantity and the position one-to-one of gallows (2) and last gallows (3) down, coupling assembling includes stove bottom lifting pin (5) and inserts wedge (6), pinhole (13) that are used for inserting and establish wedge (6) are offered to stove bottom lifting pin (5) lower part, a plurality of locking hole (14) have been offered on inserting wedge (6) for wear to establish bolt (8) in order to make wedge (6) and stove bottom lifting pin (5) location in the horizontal direction, the T-shaped groove that the lower extreme was beaten through has been offered to the one side of going up gallows (3) and keeping away from stove body (4), the vertical groove that the upper and lower extreme was beaten through is offered to the one side that is used for the card to establish stove bottom lifting pin (5) end cap, the vertical groove lower extreme is used for the card to establish the vertical groove that inserts wedge (6) with the vertical wedge (5) in the vertical groove of the vertical position of wedge (5) in order to make the top of inserting wedge (6) and bottom lifting pin (5).

6. The connection device for the bottom and the body of a living bottom converter according to claim 5, wherein: the connecting assembly further comprises a locking clamping plate (7), a long slot hole is formed in the locking clamping plate, a bolt (8) penetrates through the long slot hole to fixedly connect the locking clamping plate (7) with the inserting wedge (6), and one end of the locking clamping plate (7) is tightly propped against the furnace bottom lifting pin (5).

7. The apparatus for connecting a living hearth furnace hearth to a shaft as set forth in claim 6 wherein: the upper edges of the inserting wedge (6) and the pin hole (13) are horizontal edges, the lower edges are oblique edges and have the same slope, and the locking hole (14) is formed at one side close to the oblique edge of the inserting wedge (6) and higher.

8. A living hearth furnace hearth and shaft connection as defined in any one of claims 5 to 7 wherein: the lower end face of the horizontal part of the T-shaped groove is provided with a countersunk groove at the periphery of the upper end of the vertical part, the countersunk groove comprises a circular groove (31) and a long groove (32), and the middle parts of the circular groove and the long groove are opposite to the upper end of the vertical part of the T-shaped groove.

9. A living hearth furnace hearth and shaft connection as defined in any one of claims 5 to 7 wherein: the lower hanging bracket (2) and the upper hanging bracket (3) are respectively welded and fixed with the furnace bottom (1) and the furnace body (4).