Large blast furnace combined type lifting beam and lifting device

Abstract

The utility model provides a combined type lifting beam of a large blast furnace. The combined type lifting beam comprises a lifting girder assembly erected at the top of a furnace body frame and a lifting small beam fixed on the lifting girder assembly, wherein the lifting girder assembly is of a rectangular structure, the small lifting beams are connected between the two adjacent edges of the lifting girder, and the middle of each small lifting beam is connected with the large blast furnace to be lifted through the lifting assembly. The combined type lifting beam of the large blast furnace can solve the problems that an existing lifting beam of the large blast furnace is low in bearing capacity and large in manufacturing and installation difficulty.

Description

TECHNICAL FIELD

[0001] The utility model relates to installation engineering technical field, more specifically, relate to a large -scale blast furnace combined type lifting beam and lifting device. BACKGROUND

[0002] At present, the reconstruction construction period of large-scale blast furnace at home and abroad is basically shorter, and the construction period is nervous. The blast furnace body as the main line engineering of the blast furnace system reconstruction directly influences the commissioning time of the blast furnace system. The large-scale blast furnace rapid repair is the construction mode of offline prefabrication assembly, integral segmented pushing and lifting installation, which can greatly shorten the construction period in this technology.

[0003] For small and medium-sized blast furnace, the weight is smaller when segmented lifting, and the requirement of lifting beam is relatively lower. However, for some large and super large blast furnace, the volume of furnace shell increases, the number of furnace body accessories increases, and the lifting weight of furnace body also increases significantly. The single segment lifting weight of large and super large blast furnace is generally 2000-3000 tons, and the bearing capacity and rigidity of lifting beam are required higher.

[0004] However, the conventional lifting beam is generally single-layer structure, and for the increase of lifting weight, the bearing capacity can only be improved by increasing the cross section of the cross beam, which leads to the increase of the volume of the lifting beam, and brings certain difficulty to the production and installation.

[0005] Therefore, a lifting beam structure with large lifting weight and convenient production and installation is needed. UTILITY MODEL CONTENTS

[0006] In view of the above problems, the utility model aims at providing a large-scale blast furnace combined type lifting beam and lifting device to solve the problems of low bearing capacity and large production and installation difficulty of the existing large-scale blast furnace lifting beam.

[0007] The utility model provides a large-scale blast furnace combined type lifting beam, which comprises a lifting girder assembly arranged on the top of the furnace body frame and a lifting small beam fixed on the lifting girder assembly.

[0008] The lifting girder assembly is in rectangular structure, the lifting small beam is connected between the adjacent two sides of the lifting girder, and the middle part of each lifting small beam is connected with the large-scale blast furnace to be lifted through a lifting assembly.

[0009] In addition, preferably, the lifting girder assembly comprises two first girders arranged in parallel, and a second girder is connected between the two corresponding ends of the two first girders.

[0010] In addition, preferably, the length of the first girder is greater than the length of the second girder.

[0011] In addition, preferably, a first reinforcing rib is arranged in the middle of each first large beam, a second reinforcing rib is arranged in the middle of each lifting small beam, and a third reinforcing rib is arranged in the middle of each second large beam.

[0012] In addition, preferably, at least two first reinforcing ribs are arranged in the middle of each first large beam and are uniformly distributed in the middle of each first large beam; at least two second reinforcing ribs are arranged in the middle of each lifting small beam and are uniformly distributed in the middle of each lifting small beam; and at least two third reinforcing ribs are arranged in the middle of each second large beam and are uniformly distributed in the middle of each second large beam.

[0013] In addition, preferably, each lifting small beam is fixed to the top of the lifting large beam assembly and is connected between adjacent first large beams and second large beams.

[0014] In addition, preferably, a through hole is formed in the middle of each lifting small beam, and the steel strand in the lifting assembly penetrates through the corresponding through hole.

[0015] In addition, preferably, at least two through holes are formed in the middle of each lifting small beam, and

[0016] The through holes are uniformly distributed in the middle of each lifting small beam.

[0017] In another aspect, the utility model also provides a large blast furnace lifting device, which comprises the large blast furnace combined lifting beam and the lifting assembly connected to the large blast furnace combined lifting beam.

[0018] In addition, preferably, the lifting assembly comprises a lifting machine arranged on each lifting small beam, and a steel strand is connected to each lifting machine and penetrates through the corresponding through hole.

[0019] The lower end of each steel strand is connected to the large blast furnace to be lifted through a lifting lug and an anchor plate.

[0020] Compared with the prior art, the large blast furnace combined lifting beam according to the utility model has the following beneficial effects:

[0021] By optimizing the structure, a large-small beam combined double-layer lifting beam structure is designed, the position of the large-small beam (including the lifting large beam assembly and the lifting small beam) is reasonably arranged, the stress position of the entire lifting beam is adjusted, the working capacity of the entire lifting beam can be significantly improved, the cross section of the entire lifting beam can be reduced, and the weight of the entire lifting beam can be reduced to a certain extent; the performance of the lifting beam is improved, the manufacturing and installation difficulty of the entire lifting beam is reduced, and the stability and construction efficiency are improved. BRIEF DESCRIPTION OF DRAWINGS

[0022] Other objects and results of the present application will become more fully understood from the following description taken in conjunction with the accompanying drawings, and by the claims. It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application, as claimed.

[0023] In the drawings:

[0024] Figure 1 A perspective view of a large blast furnace combined lifting beam is provided for an embodiment of the present application;

[0025] Figure 2 An efficiency diagram of a large blast furnace combined lifting beam in actual use is provided for an embodiment of the present application;

[0026] Figure 3 A stress state diagram of a main beam of a conventional lifting beam;

[0027] Figure 4 A stress state diagram of a main beam of a large blast furnace combined lifting beam is provided for an embodiment of the present application;

[0028] Figure 5 A bending moment comparison diagram of a main beam of a conventional lifting beam and a main beam of a large blast furnace combined lifting beam provided for an embodiment of the present application;

[0029] Figure 6 An effect diagram of a large blast furnace combined lifting beam in actual use removing a furnace body frame is provided for an embodiment of the present application.

[0030] Reference signs: lifting large beam assembly 10, lifting small beam assembly 20, first large beam 1, second large beam 2, first reinforcing rib 3, lifting small beam 4, through hole 5, second reinforcing rib 6, hoist 7, furnace body frame 8, steel strand 91, lifting lug 92, anchor plate 93, large blast furnace to be lifted 94.

[0031] The same reference signs in all the drawings indicate similar or corresponding features or functions. DETAILED DESCRIPTION

[0032] In the following description, for purposes of explanation and to provide a complete understanding of one or more embodiments, numerous specific details are set forth. It is apparent, however, to one skilled in the art that these embodiments, like any other construction and device, can be practiced without some or all of these specific details. In other instances, well-known structures and devices are shown in block diagram form to avoid obscuring the underlying principles of the one or more embodiments.

[0033] In the description of the utility model, it is necessary to explain that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model; the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance; in addition, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, and it can be the communication inside two elements. For ordinary skilled persons in the art, the specific meaning of the above-mentioned terms in the utility model can be understood according to the specific circumstances.

[0034] Figure 1 The embodiment of the utility model provides the three-dimensional structure of large blast furnace combined type lifting beam, Figure 2 The embodiment of the utility model provides the effect of large blast furnace combined type lifting beam in actual use, Figure 3 The stress state of the main beam of the conventional lifting beam is shown, Figure 4 The stress state of the main beam of the large blast furnace combined type lifting beam provided by the embodiment of the utility model is shown, Figure 5 The bending moment comparison relationship of the main beam of the conventional lifting beam and the main beam of the large blast furnace combined type lifting beam provided by the embodiment of the utility model is shown, Figure 6 The effect of removing the furnace body frame of the large blast furnace combined type lifting beam provided by the embodiment of the utility model in actual use is shown.

[0035] Combined Figures 1 to 6 It can be known that the large blast furnace combined type lifting beam provided by the utility model comprises a lifting girder assembly 10 (as a main beam) erected on the top of the furnace body frame 8 and a lifting small beam assembly 10 fixed on the lifting girder assembly 10, and the lifting small beam assembly 20 comprises a plurality of lifting small beams 4.

[0036] It needs to be explained that, since the beam of the furnace body frame 8 at the top of the furnace body frame 8 is in a rectangular structure, in order to realize the stable support of the large blast furnace combined lifting beam and the beam of the furnace body frame 8 provided by the utility model, the lifting girder assembly 10 also needs to be arranged in a rectangular structure, and the lifting girder assembly 10 needs to be arranged on the beam of the furnace body frame 8 after being rotated by 45°; the adjacent two sides of the lifting girder are connected with the lifting small beams 4, the middle part of each lifting small beam 4 is connected with the lifting assembly, and each lifting small beam 4 is connected with the large blast furnace 94 to be lifted through the lifting assembly, so that the lifting of the large blast furnace 94 to be lifted is realized.

[0037] In one specific embodiment of the utility model, in order to realize the manufacturing of the lifting girder assembly 10, the lifting girder assembly 10 can include two first girders 1 arranged in parallel, and the second girder 2 is connected between the two corresponding ends of the two first girders 1, so as to form the lifting girder assembly 10 in a rectangular structure. It needs to be explained that the length of the first girder 1 needs to be slightly larger than the length of the second girder 2, so as to ensure that the manufactured lifting girder assembly 10 is in a rectangular structure, and is convenient for being matched with the beam of the furnace body frame 8.

[0038] In addition, in order to improve the support stability of the first girder 1, the first reinforcing rib 3 can be arranged in the middle part of each first girder 1; in order to improve the support stability of the first lower beam, the second reinforcing rib 6 can be arranged in the middle part of each lifting small beam 4; and in order to improve the support stability of the second girder 2, the third reinforcing rib (not marked in the figure) can be arranged in the middle part of each second girder 2. It needs to be explained that, in order to ensure that the reinforcing rib can provide the required support strength, under normal circumstances, the first reinforcing rib 3 is arranged with multiple roots (at least two roots) in the middle part of each first girder 1, and the first reinforcing rib 3 is uniformly distributed in the middle part of each first girder 1; the second reinforcing rib 6 is arranged with multiple roots (at least two roots) in the middle part of each lifting small beam 4, and the second reinforcing rib 6 is uniformly distributed in the middle part of each lifting small beam 4; and the third reinforcing rib is arranged with multiple roots (at least two roots) in the middle part of each second girder 2, and the third reinforcing rib is uniformly distributed in the middle part of each second girder 2.

[0039] For the lifting small beam assembly 20, in order to ensure the connection stability of each lifting small beam 4 and the lifting girder assembly 10, each lifting small beam 4 can be fixed at the top of the lifting girder assembly 10 and connected between the adjacent first girder 1 and the second girder 2.

[0040] Furthermore, to ensure compatibility between each lifting beam 4 and its corresponding lifting assembly, through holes 5 are provided in the middle of each lifting beam 4. The steel strands 91 in the lifting assembly pass through the corresponding through holes 5 and connect to the side wall of the large blast furnace 94 to be lifted below. Moreover, to further improve lifting stability, multiple (at least two) through holes 5 are provided in the middle of each lifting beam 4; and the through holes 5 are evenly distributed in the middle of each lifting beam 4, with a steel strand 91, whose lower end is connected to the large blast furnace 94 to be lifted, passing through each through hole 5.

[0041] On the other hand, in order to lift the large blast furnace 94 to be lifted, this utility model also provides a large blast furnace lifting device. The device includes a large blast furnace combined lifting beam provided by this utility model and a lifting component connected to the large blast furnace combined lifting beam. The large blast furnace combined lifting beam, together with the lifting component, lifts the large blast furnace 94 to be lifted.

[0042] Specifically, the lifting assembly may include a hoist 7 mounted on each lifting beam 4, with steel strands 91 connected to each hoist 7. Each steel strand 91 passes through a through hole 5 on the corresponding lifting beam 4, and the lower end of each steel strand 91 is connected to the large blast furnace 94 to be lifted via a lifting lug 92 and an anchor plate 93. During operation, the large blast furnace 94 can be lifted by controlling the lifting force of each hoist 7. It should be noted that the specific implementation of connecting the lower end of each steel strand 91 to the large blast furnace 94 via the lifting lug 92 and anchor plate 93 is a common technical means in the field and is widely described in the prior art; therefore, it will not be elaborated here.

[0043] The following details the specific manufacturing, arrangement, and usage process of the large blast furnace combined lifting beam provided by this utility model.

[0044] In the fabrication of the combined lifting beam for a large blast furnace, two box-shaped lifting beams are made of steel plates as the first main beam 1, and two more box-shaped lifting beams are made of steel plates as the second main beam 2. The first main beam 1 and the second main beam 2 have the same cross-section; the first main beam 1 is a long beam, and the second main beam 2 is a short beam. The first main beam 1 and the second main beam 2 form a rectangular lifting beam assembly 10, with the two second main beams 2 serving as connecting beams between the two first main beams 1. Furthermore, multiple reinforcing ribs are evenly distributed in the middle sections of both the first main beam 1 and the second main beam 2 to increase their structural stability.

[0045] Four box-shaped beams made of steel plates are used as lifting beams 4. According to the pre-set dimensions of the furnace shell lifting lugs 92 and the specifications of the hoist 7, a certain number (e.g., 3) of through holes 5 are opened on each lifting beam 4 for installing the hoist 7 and the steel strands 91. Second reinforcing ribs 6 are arranged on both sides of each through hole 5 to increase the structural stability of the lifting beam 4. The lifting beam assembly 20 (composed of four lifting beams 4) is also a rectangular structure and is installed above the lifting beam assembly 10.

[0046] For optimizing the beam bending moment, such as Figures 3 to 5 As shown, based on the structural characteristics of the combined lifting beam and the conventional lifting beam, the bending moment optimization effect of the lifting beam is analyzed. Specifically, the conventional lifting beam lacks the lifting girders 4, has a relatively long main lifting beam, and the stress point is at the mid-span, resulting in a large bending moment. The combined lifting beam provided by this invention includes lifting girder assembly 20 and main lifting beam assembly 10. The lifting girders 4 are shorter, thus resulting in a smaller bending moment. Due to the presence of the lifting girders 4, the stress point of the main lifting beam assembly 10 shifts from the mid-span to the support points on both sides, significantly reducing the bending moment of the main lifting beam assembly 10. Furthermore, the bending moment experienced by the main lifting beam assembly 10 is only 58.6% of that of the conventional lifting beam, improving performance by approximately 170%.

[0047] During the arrangement of the lifting beams, the first main beam 1 and the second main beam 2 are installed one by one above the top frame beam of the furnace body frame 8. The first main beam 1 and the second main beam 2 are assembled into a rectangular frame, which is rotated 45° from the top frame beam of the furnace body frame 8. The lifting sub-beams 4 are installed one by one above the lifting main beam assembly 10. The lifting sub-beams 4 are assembled into a rectangular frame, which is rotated 45° from the lifting main beam assembly 10. Finally, as needed, multiple (e.g., 12) hydraulic lifting machines 7 are installed one by one above the lifting sub-beams 4, aligned with the corresponding through holes 5. The steel strands 91 pass through the corresponding through holes 5 to complete the installation.

[0048] During blast furnace hoisting, the blast furnace body is connected to each hoist 7 via lifting lugs 92, steel strands 91, and anchor plates 93. Each hoist 7 executes the command of locking-hoisting-locking-resetting-locking again-hoisting again, and through repeated actions, the blast furnace is hoisted to the required height.

[0049] As can be seen from the above specific embodiments, the large blast furnace combined lifting beam provided by this utility model has at least the following advantages:

[0050] 1. By rationally combining the lifting beam assembly with the lifting sub-beam, the structural form of the lifting beam can be optimized, the bending moment borne by the lifting beam can be significantly reduced, the performance of the lifting beam can be greatly improved, and the stability of the blast furnace lifting process can be guaranteed.

[0051] 2. Compared with conventional single-layer lifting beams, under the same lifting load, this utility model can achieve a smaller cross-section of the beam, thus achieving a certain degree of weight reduction, making it easier to manufacture and install, significantly improving construction efficiency, and saving time and costs.

[0052] 3. In some space-constrained scenarios, large-volume lifting beams are difficult to install; the large blast furnace combined lifting beam provided by this utility model has the advantage of being lightweight compared to conventional lifting beams, and the large and small lifting beams can be flexibly disassembled and assembled, and can still be arranged in some specific scenarios, thus improving the application range of lifting beams.

[0053] 4. The large blast furnace combined lifting beam provided by this utility model improves the performance of the lifting beam by optimizing the structural form, without the need for special materials. It is highly practical, stable, and has great promotional value.

[0054] As per the above reference Figures 1 to 6 A large blast furnace combined lifting beam and lifting device according to the present invention have been described by way of example. However, those skilled in the art should understand that various modifications can be made to the large blast furnace combined lifting beam and lifting device proposed in the present invention without departing from the scope of the present invention. Therefore, the scope of protection of the present invention should be determined by the contents of the appended claims.

Claims

1. A large blast furnace combined lifting beam, characterized in that, This includes a lifting beam assembly mounted on top of the furnace frame and lifting sub-beams fixed to the lifting beam assembly; wherein, The lifting beam assembly has a rectangular structure, and the lifting sub-beams are connected between adjacent sides of the lifting beam. The middle of each lifting sub-beam is connected to the large blast furnace to be lifted via the lifting assembly.

2. The large blast furnace combined lifting beam as described in claim 1, characterized in that, The lifting beam assembly includes two parallel first beams, with a second beam connected between each of the two corresponding ends of the two first beams.

3. The large blast furnace combined lifting beam as described in claim 2, characterized in that, The length of the first beam is greater than the length of the second beam.

4. The large blast furnace combined lifting beam as described in claim 3, characterized in that, A first reinforcing rib is arranged in the middle of each first main beam, a second reinforcing rib is arranged in the middle of each lifting beam, and a third reinforcing rib is arranged in the middle of each second main beam.

5. The large blast furnace combined lifting beam as described in claim 4, characterized in that, At least two of the first reinforcing ribs are arranged in the middle of each first beam, and the first reinforcing ribs are evenly distributed in the middle of each first beam. At least two of the second reinforcing ribs are arranged in the middle of each lifting beam, and the second reinforcing ribs are evenly distributed in the middle of each lifting beam. At least two third reinforcing ribs are arranged in the middle of each second beam, and the third reinforcing ribs are evenly distributed in the middle of each second beam.

6. The large blast furnace combined lifting beam as described in claim 1, characterized in that, Each lifting beam is fixed to the top of the lifting beam assembly and connected between the adjacent first and second beams.

7. The large blast furnace combined lifting beam as described in claim 1, characterized in that, Each lifting beam has a through hole in the middle, and the steel strands in the lifting assembly pass through the corresponding through holes.

8. The large blast furnace combined lifting beam as described in claim 7, characterized in that, At least two through holes are provided in the middle of each lifting beam; and, The through holes are evenly distributed in the middle of each lifting beam.

9. A large blast furnace hoisting device, characterized in that, It includes the large blast furnace combined lifting beam as described in any one of claims 1 to 8 and the lifting assembly connected to the large blast furnace combined lifting beam.

10. The large blast furnace hoisting device as described in claim 9, characterized in that, The lifting assembly includes a lifting machine mounted on each lifting beam, with steel strands connected to each lifting machine, and each steel strand passing through a corresponding through hole in each lifting beam; and... The lower ends of each steel strand are connected to the large blast furnace to be lifted via lifting lugs and anchor plates.

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