Converter self-adaptive suspension structure

Abstract

The present invention discloses a self-adaptive suspension structure for a converter, comprising a vertical link mechanism connecting the lower edge of the support ring body with the lower half body of the converter, and a horizontal link mechanism connecting the upper edge of the support ring body with the upper half body of the converter, the horizontal link mechanism is located above the vertical link mechanism, the plane where the axis of the trunnion of the support ring body and the axis of the support ring body are located is the first reference plane, the symmetric center of each set of vertical link mechanisms is located in the radial area of ​​the first angle, the two planes forming the first angle are both overlapped with the axis of the support ring body, and the two planes form angles of 15° and 50° with the first reference plane respectively. The suspension structure of the present invention not only makes the converter tilting noise-free and more stable, and solves the static instability problem, but also favors the self-adaptive operation mode of the converter suspension link mechanism, improves the service life of the suspension link mechanism, eliminates the need for maintenance for a long time, realizes the interchangeability of the main parts of the link mechanism, and reduces the amount of equipment spare parts and equipment maintenance work.

Description

[Technical Field]

[0001] The present invention relates to the field of metallurgy, and in particular to a converter self-adaptive suspension structure. [Background technology]

[0002] The suspension system is one of the key components of a converter furnace. In practice, the support rings of the suspension system are positioned outside the furnace body using different types of suspension structures to provide support for the furnace body. During operation, a tilting moment is applied to the trunnion of the support ring, which transmits the moment to the furnace body. The support ring also absorbs various stresses and deformations that occur in the furnace body due to temperature changes.

[0003] However, the technical difficulty of the converter lower suspension support system is the horizontal support when the converter is in a non-vertical operating position, particularly the horizontal support structure and arrangement of the link mechanism and converter operation. When the converter tonnage is relatively large, this has a direct impact on the equipment operation safety and operating quality (whether the converter tilting is stable, whether there is impact, vibration, wear and tear, abnormal noise, and whether there is a safety margin for the converter equipment), and the number of link mechanisms installed and their locations on the converter equipment are the core technical concept of the horizontal support of the link mechanism.

[0004] According to theoretical analysis and engineering practice, no matter what suspension structure is adopted, when the converter is operating and tilting and rotating, starting and stopping in forward and reverse rotation, there are frequent impacts from huge braking inertia mechanical forces, and the equipment is deformed due to high thermal load. Therefore, "alternating dislocations" will occur between the furnace body and the support ring body, including "alternating dislocations" caused by the torsional action of the support ring itself when the converter tilts, and "alternating dislocations" caused by the equipment structure, motion inertia, and thermal expansion differences between the furnace body and the support ring body. Therefore, most suspension structures are designed to have a certain self-adaptive deformation ability to accommodate such alternating dislocations.

[0005] In the "tilting converter" of Patent Document 1, multiple link mechanisms are provided between the lower part of the support ring and the converter body. These link mechanisms are of two types: vertical link mechanisms and horizontal link mechanisms. Three sets of horizontal link mechanisms are provided. A link-type suspension for the swing rod 7 is provided in the center below the converter support ring, and one horizontal swing rod is provided at the weak section below the converter support ring where the trunnions on each side horizontally support the ring. In actual construction, it has been proven that if one horizontal swing rod is provided at the end of the trunnion on each side, it is not suitable for the operating mode of a large-tonnage converter. When the converter is in a vertical operating position with the throat facing upward, the load is mainly concentrated on the vertical link mechanisms, which can operate self-adaptively. However, when the converter is in a non-vertical operating position, the load is mainly concentrated on the horizontal link mechanisms, which can operate self-adaptively even with the load. However, finite element analysis and engineering practice demonstrated that, in both upright and inverted positions, the torsional force on the horizontal link mechanism was most pronounced at the attachment point below the support ring near the trunnion. This resulted in a significant increase in the "alternate displacement" at this location during the entire converter tilting and rotation process. The "alternate displacement" ranged from 7 to 13 mm, with actual measurements reaching a maximum of 15 mm. While the link mechanism itself could self-adaptively absorb some of the relative displacement, the large displacement at this location, combined with the alternating displacement shock, made it difficult for the horizontal link mechanism to absorb all of the relative displacement. This not only affected the operating principle, in which the two horizontal link force bars were only subjected to tensile pressure, but also impacted the horizontal link mechanism's operating life. Engineering practice also demonstrated that the horizontal support structure and layout of this tilting converter were inherent "weaknesses" in the design.

[0006] In Patent Document 2, "Layout Structure of Four-Link Suspension Device for Converter," four vertical link mechanisms are installed between the lower edge of the support ring and the converter casing, and a baffle mechanism is installed between the upper edge of the support ring and the converter casing. This vertical link mechanism also has a certain self-adaptive deformation ability. However, when a baffle mechanism is installed in a converter, no matter where the baffle mechanism is installed in the converter equipment, alternating elastic sliding will exist between the baffle on the converter casing and the support ring support seat, causing friction and wear. A gap will be formed between the baffle on the converter casing and the support ring support seat. When the converter brakes forward and backward due to the strong inertia of the converter, a strong impact and sound will be generated, and the baffle will even fall off due to the impact. This will inevitably pose a risk to the equipment and personal safety during the operation of the converter. Therefore, the baffle mechanism must be regularly maintained and the worn parts replaced. This is a fundamental "flaw" that is difficult to solve in the baffle mechanism itself. In the proposal disclosed in this patent, replaceable anti-friction pads are provided between the baffle and the support seat of the bearing ring, but this means that connecting members must be used to connect the anti-friction pads to the baffle or the support seat. Under the poor smelting conditions of converter steelmaking, such as high temperatures, dust, and spatter, it is very difficult to dismantle the connecting members one by one and replace the anti-friction pads in the narrow space between the baffle and the support seat. Furthermore, the connecting members are deformed, glued, and jammed in the high temperature, dust, and spatter environment, so they cannot be dismantled at all and must be cut off and replaced, which increases the maintenance costs and time of the equipment.

[0007] Furthermore, whether it is the link-type suspension system of the rocking rods 6 or 7 adopted in the "tilting converter" of Patent Document 1, or the system proposed in Patent Document 2, "Layout structure of four-point link suspension device for converter," in which a guide seat is provided to limit the movement of the converter casing along the trunnion axial direction, the suspension support system for the entire converter is complex, which not only brings about static instability but also is disadvantageous to the self-adaptive operation of the converter suspension system and increases the amount of maintenance work for the equipment, and does not need to be verified by actual construction application. [Prior art documents] [Patent documents]

[0008] [Patent Document 1] Chinese Patent Application No. 93117357.4 [Patent Document 2] Chinese Patent Application No. 201210291941.6 Summary of the Invention

[0009] In view of the shortcomings of the prior art, the object of the present invention is to provide a self-adaptive suspension structure for converter, which optimizes the number of link mechanisms installed and their locations in the converter equipment, adapts to the operating conditions of large-tonnage converters, improves the service life of the suspension structure, and reduces the equipment maintenance costs of the suspension structure.

[0010] To achieve the above and other related objects, the technical solution of the present invention is as follows:

[0011] The self-adaptive converter suspension structure includes a vertical link mechanism connecting the lower edge of the support ring body with the lower half body of the converter, and a horizontal link mechanism connecting the upper edge of the support ring body with the upper half body of the converter, the horizontal link mechanism being located above the vertical link mechanism, the plane on which the trunnion axis of the support ring body and the axis of the support ring body are located being a first reference plane, the symmetry centers of the vertical link mechanisms themselves are located in the radial region of a first angle, the two planes forming the first angle are all overlapped with the axis of the support ring body, and the two planes form angles of 15° and 50° with the first reference plane, respectively. Specifically, the horizontal link mechanism is located completely directly above the vertical link mechanism, and is oriented in a direction perpendicular to the first reference plane m connecting the axis of the trunnion of the support ring body and the axis of the support ring body. And up Below, the four sets of horizontal link mechanisms and the four sets of vertical link mechanisms are arranged.

[0012] Preferably, the centers of symmetry of the vertical link mechanisms themselves are all flush with the axis of the support ring body.

[0013] Preferably, the horizontal link mechanism has an installation position reference mark, which is located in the radial region of the second angle, and the plane on which the center of symmetry of the vertical link mechanism itself and the axis of the support ring body are located is used as the second reference plane, the installation position reference mark is located in the radial region of the second angle, and the two planes forming the first angle both overlap with the axis of the support ring body and form angles of -10° and 10° with the second reference plane, respectively, each of the vertical link mechanisms is arranged symmetrically with respect to the first reference plane, and each of the horizontal link mechanisms is arranged symmetrically with respect to the first reference plane.

[0014] Preferably, the horizontal link mechanism comprises: Installed in the upper half of the converter a first link seat; The support ring body is provided at the upper edge thereof. Second link seat and and horizontal links hingedly connected to the first link seat and the second link seat, The mounting position reference mark is displayed on the horizontal link.

[0015] Preferably, the mounting position reference mark is located at the center of the horizontal link.

[0016] Preferably, the mounting position reference mark is an identification hole provided in the horizontal link.

[0017] Preferably, the vertical link mechanism includes a third link seat, a vertical link, and a fourth link seat, the third link seat being installed on the lower half body of the converter, the fourth link seat being installed on the lower edge of the support ring body, and the third link seat and the fourth link seat being hingedly connected to the vertical link, respectively.

[0018] Preferably, the horizontal links in each of the horizontal link mechanisms and the vertical links in each of the vertical link mechanisms have the same shape and dimensions.

[0019] Preferably, the first link seat and the second link seat are rotatably connected to the horizontal link via a first joint bearing and a first hinge shaft, respectively, and the third link seat and the fourth link seat are rotatably connected to the vertical link via a second joint bearing and a second hinge shaft, respectively, and the first joint bearing and the second joint bearing have the same structure and dimensions, and the first hinge shaft and the second hinge shaft have the same structure and dimensions.

[0020] Preferably, the number of the vertical link mechanisms and the horizontal link mechanisms is four, and two sets of vertical link mechanisms and two sets of horizontal link mechanisms are respectively installed on both sides of the reference plane.

[0021] The self-adaptive suspension structure for converter furnaces according to the present invention does not produce abnormal noise when the converter is tilted during actual operation, and the operation is more stable. The link mechanism does not require adjustment, which not only solves the problem of static instability but also benefits the self-adaptive operating conditions of the converter suspension link mechanism, improves the service life of the suspension mechanism, makes the equipment maintenance-free for a long period of time, and the main parts of the horizontal and vertical link mechanisms can be replaced, reducing the variety of equipment parts and the amount of equipment maintenance work. [Brief explanation of the drawings]

[0022] [Figure 1] 1 is a schematic diagram showing an embodiment using a converter self-adaptive suspension structure according to the present invention; [Figure 2] FIG. 2 is a plan view of FIG. [Figure 3] This is a view from the K direction in Figure 2. [Figure 4] FIG. 2 is an enlarged view of part I in FIG. [Figure 5] FIG. 3 is an enlarged view of part II in FIG. 2. DETAILED DESCRIPTION OF THE INVENTION

[0023] Hereinafter, embodiments of the present invention will be described with reference to certain examples, and those skilled in the art will easily understand other advantages and effects of the present invention from the contents disclosed herein.

[0024] 1 to 3, the converter includes a furnace body 1 and a support ring 2, the support ring 2 has a support ring body 21 and a trunnion shaft 22 provided on the support ring body 21, and the self-adaptive suspension structure for a converter according to the present invention includes a vertical link mechanism 3 and a horizontal link mechanism 4, the vertical link mechanism 3 is connected between the lower edge of the support ring body 21 and the lower half furnace body of the converter 1, and the horizontal link mechanism 4 is connected between the upper edge of the support ring body 21 and the upper half furnace body of the converter 1, and each set of horizontal link mechanisms 4 is one set The first reference plane m is a plane on which the axis of the trunnion shaft 22 of the support ring body 21 and the axis of the support ring body 21 are located, and the center of symmetry of each set of vertical link mechanisms 3 itself is located in the radial area of ​​the first angle α, and both planes forming the first angle α overlap with the axis of the support ring body 21, and in the two planes, the first plane A and the first reference plane m form an angle of 15°, and the second plane B and the first reference plane m form an angle of 50°. Here, the 15° angle includes both clockwise and counterclockwise situations, and for the same set of vertical link mechanisms 3, the first plane A and the second plane B are located on the same side of the first reference plane m.

[0025] Here, the center of symmetry of the vertical link mechanism 3 itself essentially refers to the central plane n. Here, the term "corresponding to the horizontal link mechanism 4 above the vertical link mechanism 3" means that when the furnace body 1 is in a vertical position, the horizontal link mechanism 4 is located completely directly above the vertical link mechanism 3 or in a position slightly off-center from the top of the vertical link mechanism 3.

[0026] 1 to 3, there are eight link mechanisms in total, four horizontal link mechanisms 4 and four vertical link mechanisms 3. In actual implementation, the number of link mechanisms can be determined based on the actual tonnage of the converter, and eight links (four vertical link mechanisms and four horizontal link mechanisms) can be used, or more link mechanisms can be arranged as needed. For example, the horizontal link mechanism is positioned completely above the vertical link mechanism, and is aligned with a first reference plane m that connects the axis of the trunnion of the support ring body and the axis of the support ring body. And upBelow, the four sets of horizontal link mechanisms and the four sets of vertical link mechanisms are arranged.

[0027] 2, in some embodiments, the center of symmetry of each set of vertical link mechanisms 3 is flush with the axis of the support ring body 21. Of course, in actual implementation, the center of symmetry of the vertical link mechanisms 3 may not be flush with the support ring body 21, as long as it is in the radial area of ​​the first corner.

[0028] In some embodiments, the horizontal linkage 4 has an attachment position reference mark 401, which is located in the radial region of the second corner and is located at the center of symmetry of the vertical linkage 3 itself. (See Figure 2) The plane on which the axis of the support ring body 21 is located is the second reference plane n, and the mounting position reference mark 401 is located in the radial range of the second angle. The two planes forming the first angle both overlap with the axis of the support ring body 21 and form angles of -10° and 10° with the second reference plane n, respectively. That is, in Figure 2, the range of β is between -10° and 10°. Here, positive and negative values ​​of β represent counterclockwise and clockwise, respectively.

[0029] In this way, the horizontal link mechanism 4 can be positioned above the vertical link mechanism 3 without excessively coming off the vertical link mechanism 3, and a highly reliable two-point support structure with self-adaptive adjustment capability can be formed for each pair of the horizontal link mechanism 4 and the vertical link mechanism 3.

[0030] In some embodiments, the horizontal link mechanism 4 includes a first link seat 41, a horizontal link 42, and a second link seat 43, the first link seat 41 is disposed on the upper half furnace body of the converter 1, the second link seat 43 is disposed on the upper edge of the support ring body 21, the horizontal link 42 is hingedly connected to the first link seat 41 and the second link seat 43, respectively, and the mounting position reference mark 401 is on the horizontal link 42. For example, referring to FIGS. 2 and 5, the mounting position reference mark 401 may be an identification hole provided in the horizontal link 42. In actual implementation, the structure of the horizontal link mechanism 4 is different from that of the vertical link mechanism 3. The horizontal link mechanism 4 itself may not have a symmetrical structure, and therefore there is no central plane of symmetry. The horizontal link 42 of the horizontal link mechanism 4 is installed horizontally, and its specific installation position is difficult to determine. Therefore, installing the mounting position reference mark 401 on the horizontal link 42 is advantageous in determining the placement position of the horizontal link mechanism 4 and ensures that the horizontal link mechanism 4 is located in a relatively small area of ​​"alternating displacement."

[0031] In some embodiments, the mounting position reference mark 401 is located at the center of the horizontal link 42 .

[0032] In some embodiments, referring to Figures 1 and 4, the vertical link mechanism 3 includes a third link seat 31, a vertical link 32, and a fourth link seat 33, wherein the third link seat 31 is disposed on the lower half body of the converter 1, and the fourth link seat 33 is disposed on the lower edge of the ring body of the support ring body 21, and the third link seat 31 and the fourth link seat 33 are hingedly connected to the vertical link 32, respectively.

[0033] In some embodiments, the horizontal links 42 of each horizontal link mechanism 4 and the vertical links 32 of each vertical link mechanism 3 have the same shape and dimensions, so that the horizontal links 42 and the vertical links 32 are interchangeable, reducing the number of different parts, lowering the cost of spare parts for the equipment, and facilitating assembly.

[0034] In some embodiments, the first link seat 41 and the second link seat 43 are rotatably connected to the horizontal link 42 via a first joint bearing 44 and a first hinge shaft 45, respectively, and the third link seat 31 and the fourth link seat 33 are rotatably connected to the vertical link 32 via a second joint bearing 34 and a second hinge shaft 35, respectively, and the first joint bearing 44 and the second joint bearing 34 have the same structure and dimensions, and the first hinge shaft 45 and the second hinge shaft 35 have the same structure and dimensions. During assembly, the joint bearings and hinge shafts of the horizontal link mechanism 4 and the vertical link mechanism 3 can also be replaced, further reducing the number of parts, further lowering the cost of equipment parts, and further improving the agility of assembly.

[0035] In some embodiments, referring to Figures 1-2, symmetrical portions of each horizontal linkage are disposed on either side of a first reference plane m, and symmetrical portions of each vertical linkage are disposed on either side of a second reference plane n.

[0036] The advantageous effects of the present invention are as follows: 1. Through finite element analysis and extensive engineering work, it was found that this suspension structure installs the vertical link mechanism 3 in a predetermined angle region (here, the radial region of the first angle α) and the horizontal link mechanism 4 directly above the vertical link mechanism 3. The vertical link mechanism is the main mechanism for restraining the "alternating displacement" of the support surface of the horizontal link mechanism 4. Not only that, both the vertical link mechanism 3 and the horizontal link mechanism 4 are away from the position where the amount of cross displacement between the furnace body 1 and the support ring 2 is maximum (up to 15 mm), but the horizontal link mechanism 4 is located in the position range where the "alternating displacement" between the furnace body 1 and the support ring 2 is minimum (1 mm to 2 mm). This makes the mounting "base surface" of the horizontal link mechanism 4 more solid, the working conditions more ideal, and the working life longer, thereby realizing the optimization of the self-adaptive suspension structure layout of the lower suspension of the entire converter. The reason why the horizontal link support mechanism in Patent No. ZL93117357.4 is installed close to the bottom of the trunnion support ring is mainly because "the force generated by tilting is directed as directly as possible to the load trunnion, so that the support ring is maintained in a state of maximum stress-freeness." However, this location overlooks the fact that the entire support ring is subject to the maximum "alternating displacement" due to torsional action, and the operating conditions of the horizontal link are the most unfavorable. In fact, the rigidity and strength of the converter support ring and the entire trunnion equipment are far greater than those of the horizontal link mechanism. Relatively speaking, the rigidity and strength mechanical performance of the horizontal link mechanism installed here are very weak, so the optimal location for the horizontal link mechanism is to install it at a relatively small "alternating displacement" position between the converter equipment furnace body and the support ring.

[0037] 2. By omitting the link-type suspension of the swing rod 7 in Chinese Patent Application No. 93117357.4 and the guide seat that moves along the axial direction of the trunnion during the tilting process of the converter casing in Chinese Patent Application No. 201210291941.6, the horizontal support mechanism below the converter is simplified, the statically indeterminate problem that exists in the conventional suspension structure is resolved, and the self-adaptive mode of the converter suspension link mechanism is favorable, thereby reducing the amount of maintenance work required for the equipment.

[0038] 3. More importantly, the novel self-adaptive suspension structure for converters of the present invention utilizes a pair of horizontal linkages and vertical linkages to form a two-point support structure on both the upper and lower sides of the support ring. Compared with the system in Patent No. ZL93117357.4 in which horizontal linkages are installed below the trunnions on each side to form a single-point support, the suspension structure of the present invention is more applicable to the operating mode of large-tonnage converters.

[0039] 4. A simple and reliable converter under-suspension system with a perfect and optimal statically determined design between the support ring and converter casing, a flexible and strong connection between the support ring and converter casing, and each link distributes the load evenly and self-adapts to compensate for thermal deformation, allowing for high mechanical and thermal loads, long life, and harsh environments.

[0040] 5. The main components of the vertical link mechanism 3 and the horizontal link mechanism 4 in the suspension structure of the present invention, such as the vertical link 32, the horizontal link 42, the joint bearings 34, 44, and the hinge shafts 35, 45, are all replaceable, thereby significantly reducing the variety of spare parts for the vertical link mechanism 3 and the horizontal link mechanism 4, as well as the equipment maintenance costs and time.

[0041] 6. Compared with the baffle mechanism system, the link mechanism does not require adjustment work, and in the suspension structure of the present invention, both the horizontal link mechanism and the vertical link mechanism have the ability of self-adaptation, are not sensitive to environments lacking fat lubrication, and the tilting operation of the converter does not generate abnormal noise, and the working life is longer, making the equipment maintenance-free for a long period of time.

[0042] Those skilled in the art can modify or change the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or changes made by those with ordinary skill in the art without departing from the spirit and technical ideas disclosed by the present invention should be covered by the claims. [Explanation of symbols]

[0043] 1 Furnace body (converter) 2 support rings 21 Support ring body 22 Trunnion 3 Vertical link mechanism 31 Third Link Seat 32 Vertical Link 33 Fourth Link Seat 34 Second joint bearing 35 Second hinge axis 4 Horizontal link mechanism 41 First link seat 42 Horizontal Link 43 Second Link Seat 44 First joint bearing 45 First hinge axis 401 Mounting position reference mark

Claims

1. a vertical link mechanism connecting the lower edge of the support ring body and the lower half body of the converter; A self-adaptive converter suspension structure including a horizontal link mechanism connecting the upper edge of the support ring body and the upper half body of the converter, The horizontal link mechanism is located entirely above the vertical link mechanism, and The four sets of horizontal link mechanisms and the four sets of vertical link mechanisms are arranged symmetrically above and below a first reference plane m connecting the axis of the trunnion of the support ring body and the axis of the support ring body, The center of symmetry of the vertical link mechanism itself is located in the region between a first plane A and a second plane B, where the first plane A and the second plane B include the axis of the bearing ring body, the angle between the first plane A and the first reference plane m is an acute angle of 15°, and the angle between the first reference plane m and the second plane B is an acute angle of 50°; the horizontal link mechanism comprises a first link seat installed on the upper half body of the converter, a second link seat installed on the upper edge of the support ring body, a horizontal link hingedly connected to the first link seat and the second link seat, and an attachment position reference mark, wherein a second reference plane n is defined as a plane on which the center of symmetry of the vertical link mechanism itself and the axis of the support ring body are located, and an angle β formed by the second reference plane n and the attachment position reference mark on the horizontal link mechanism is an acute angle of -10° to 10°.

2. 2. The self-adaptive suspension structure for a converter furnace according to claim 1, wherein the symmetry centers of the vertical link mechanisms are all flush with the axis of the support ring body.

3. The self-adaptive suspension structure for a converter furnace according to claim 2, wherein the mounting position reference mark is displayed on the horizontal link.

4. The self-adaptive suspension structure for converter furnace according to claim 3, characterized in that the mounting position reference mark is located at the center of the horizontal link.

5. The self-adaptive suspension structure for converter furnace according to claim 4, wherein the mounting position reference mark is an identification hole provided on the horizontal link.

6. 3. The self-adaptive suspension structure of claim 2, wherein the vertical link mechanism comprises a third link seat installed on the lower half body of the converter, a vertical link, and a fourth link seat installed on the lower edge of the support ring body, and the third link seat and the fourth link seat are hingedly connected to the vertical link respectively.

7. 7. The converter self-adapting suspension structure according to claim 6, wherein the horizontal links in each of the horizontal link mechanisms and the vertical links in each of the vertical link mechanisms have the same shape and dimensions.

8. 8. The converter self-adaptive suspension structure according to claim 7, wherein the first link seat and the second link seat are rotatably connected to the horizontal link via a first joint bearing and a first hinge shaft, respectively, and the third link seat and the fourth link seat are rotatably connected to the vertical link via a second joint bearing and a second hinge shaft, respectively, and the first joint bearing and the second joint bearing have the same structure and dimension, and the first hinge shaft and the second hinge shaft have the same structure and dimension.

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