Annular lifting lug and lifting device for large blast furnace

Abstract

The utility model provides an annular lifting lug and a lifting device for a large blast furnace, the annular lifting lug is fixedly sleeved on a furnace shell to be lifted and comprises an upper annular plate, a lower annular plate and an annular rib plate; wherein the annular rib plate is connected between the upper annular plate and the lower annular plate, the upper annular plate is divided into at least two first lifting areas in the circumferential direction, the lower annular plate is divided into at least two second lifting areas in the circumferential direction, and the first lifting areas and the second lifting areas are in one-to-one correspondence up and down; and each first lifting area is matched with the corresponding second lifting area to be connected with an external lifting assembly. According to the utility model, the problems that the stability is poor and the shell of the blast furnace is easy to damage due to the scheme that four independent lifting lugs are respectively used for lifting the four sides of the blast furnace in the prior art can be solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to installation engineering technical field, more specifically, relate to a kind of annular lifting lug and lifting device for large blast furnace. BACKGROUND

[0002] At present, the reconstruction construction period of large blast furnace at home and abroad is basically shorter, and the construction period is tight. The blast furnace body directly affects the production time of the blast furnace system as the main line project of the blast furnace system transformation. Large blast furnace rapid repair is mostly offline prefabricated 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 lifting in sections, and the requirement for lifting ring is relatively low. 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 section lifting weight of large and super large blast furnace is generally 2000-3000 tons, and the bearing capacity of lifting lug is required to be higher.

[0004] However, the conventional lifting lug is mostly four independent lifting lugs for lifting four sides of the blast furnace, and the four lifting lugs are arranged in cross shape, the contact area of single lifting lug with furnace shell is small, and the stress in lifting process is concentrated; for some thin, small rigidity and heavy weight furnace shell, the lifting mode of four independent lifting lugs is not only poor in stability, but also causes deformation of the furnace shell to a certain extent, and even damages the furnace shell.

[0005] Therefore, a lifting lug is needed to complete stable lifting of furnace shell without deformation of furnace shell. SUMMARY

[0006] In view of the above problems, the utility model aims to provide a kind of annular lifting lug and lifting device for large blast furnace, to solve the problems of poor stability and easy damage to furnace shell of the existing scheme of four independent lifting lugs for lifting four sides of the blast furnace.

[0007] The annular lifting lug for large blast furnace provided by the utility model is used for fixing and sleeving on the furnace shell to be lifted, comprising upper ring plate, lower ring plate and annular rib plate; wherein the annular rib plate is connected between the upper ring plate and the lower ring plate, the upper ring plate is divided into at least two first lifting zones in the circumferential direction, the lower ring plate is divided into at least two second lifting zones in the circumferential direction, and the first lifting zone corresponds to the second lifting zone one by one; and each first lifting zone cooperates with the corresponding second lifting zone to be connected with the external lifting assembly.

[0008] Furthermore, a preferred structure is that at least one upper lifting point is provided in each first lifting zone, and at least one lower lifting point is provided in each second lifting zone, wherein the upper lifting point and the lower lifting point correspond one-to-one; and,

[0009] Each upper lifting point is connected to the corresponding lower lifting point and the steel strand in the lifting assembly.

[0010] Furthermore, in a preferred configuration, each upper lifting point of the upper ring plate is provided with an upper U-shaped groove, and each lower lifting point of the lower ring plate is provided with a lower U-shaped groove, with the upper U-shaped grooves and lower U-shaped grooves corresponding one-to-one; and...

[0011] The steel strands are threaded through each upper U-shaped groove and the corresponding lower U-shaped groove.

[0012] In addition, a preferred structure is that each lower U-shaped groove has an anchor plate fixed to the corresponding steel strand below it.

[0013] Furthermore, a preferred structure is that longitudinal stiffeners connect each first lifting zone to its corresponding second lifting zone.

[0014] Furthermore, in a preferred configuration, the longitudinal stiffeners include reinforced stiffeners disposed on both sides of the upper U-shaped groove.

[0015] Furthermore, in a preferred configuration, the upper and lower sides of the annular stiffener are welded to the upper annular plate and the lower annular plate, respectively; and / or,

[0016] The upper and lower sides of the longitudinal stiffener are respectively welded to the upper ring plate and the lower ring plate.

[0017] On the other hand, the present invention also provides a large blast furnace lifting device, including the aforementioned annular lifting lug for a large blast furnace and a lifting assembly connected to the annular lifting lug for a large blast furnace.

[0018] Furthermore, in a preferred configuration, the lifting assembly includes a hoist and steel strands connected below the hoist; wherein,

[0019] The steel strands are threaded through each upper U-shaped groove and the corresponding lower U-shaped groove.

[0020] In addition, a preferred structure includes anchor plates, which are fixedly connected to each steel strand at a position below the corresponding lower U-shaped groove.

[0021] Compared with the prior art, the annular lifting lug for large blast furnaces according to the present invention has the following beneficial effects:

[0022] By optimizing the structural form, the annular lifting lug is in complete contact with the entire furnace shell, increasing the stress-bearing area, effectively reducing stress concentration, and increasing the stability of the annular lifting lug during use. In addition, while ensuring uniform stress distribution, the annular lifting lug can also increase the rigidity of the thin-walled shell to a certain extent, effectively preventing shell deformation during the lifting process. Furthermore, by setting multiple lifting zones (including a first lifting zone and a second lifting zone) on the annular lifting lug, the lifting stability of the furnace shell can be improved by lifting the furnace shell through multiple lifting zones. Attached Figure Description

[0023] Other objects and results of this invention will become more apparent and readily understood with reference to the following description taken in conjunction with the accompanying drawings and the contents of the claims, and with a more complete understanding of this invention.

[0024] In the attached diagram:

[0025] Figure 1 A perspective view of an annular lifting lug for a large blast furnace provided for an embodiment of this utility model;

[0026] Figure 2 A connection diagram of the annular lifting lug and furnace shell for a large blast furnace provided for an embodiment of this utility model;

[0027] Figure 3 A partially enlarged view of the annular lifting lug for a large blast furnace provided for an embodiment of this utility model;

[0028] Figure 4 A partial side view of an annular lifting lug for a large blast furnace, provided for an embodiment of this utility model;

[0029] Figure 5 An illustration showing the effect of the annular lifting lug for a large blast furnace in actual use, as provided in the embodiments of this utility model;

[0030] Figure 6 The diagram shows the effect of removing the furnace frame during actual use of the annular lifting lug for a large blast furnace, as provided in the embodiments of this utility model.

[0031] Attached reference numerals: 1. Upper ring plate; 2. Lower ring plate; 3. Upper U-shaped groove; 4. Longitudinal stiffener; 5. Annular stiffener; 6. Densified stiffener; 7. Lower U-shaped groove; 9. Steel strand; 10. Annular lifting lug; 20. Furnace shell; 30. Anchor plate; 50. Hoist; 60. Lifting beam; 70. Furnace frame.

[0032] In all the accompanying drawings, the same reference numerals indicate similar or corresponding features or functions. Detailed Implementation

[0033] In the following description, numerous specific details are set forth for illustrative purposes and to provide a thorough understanding of one or more embodiments. However, it will be apparent that these embodiments may also be implemented without these specific details. In other instances, well-known structures and devices are shown in block diagram form for ease of description of one or more embodiments.

[0034] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model; the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance; furthermore, unless otherwise explicitly specified and limited, the terms "installed," "connected," and "joined" should be interpreted broadly, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0035] Figure 1 The illustration shows a three-dimensional structure of annular lifting lugs for large blast furnaces provided by an embodiment of the present invention. Figure 2 The diagram illustrates the connection relationship between the annular lifting lug and the furnace shell of a large blast furnace according to an embodiment of the present invention. Figure 3 The diagram shows a partially enlarged structure of the annular lifting lug for a large blast furnace provided by an embodiment of the present invention. Figure 4 This illustration shows a partial side view of an annular lifting lug for a large blast furnace, according to an embodiment of the present invention. Figure 5 The illustration shows the practical application effect of the annular lifting lug for a large blast furnace provided by the embodiments of this utility model. Figure 6 The illustration shows the effect of removing the furnace frame in actual use of the annular lifting lug provided by the embodiment of the present invention for a large blast furnace.

[0036] Combination Figures 1 to 6As can be seen, the annular lifting lug 10 for large blast furnaces provided by this utility model is used to be fitted onto the furnace shell 20 to be lifted. It includes an upper ring plate 1 and a lower ring plate 2 that are symmetrical and both have annular structures. In order to achieve a stable connection between the upper ring plate 1 and the lower ring plate 2, an annular rib plate 5 is connected between the upper ring plate 1 and the lower ring plate 2. The upper side of the annular rib plate 5 is connected to the upper ring plate 1, and the lower side of the annular rib plate 5 is connected to the lower ring plate 2.

[0037] The entire annular lifting lug 10 is divided into at least two lifting zones in the circumferential direction, namely: the upper ring plate 1 is divided into at least two first lifting zones in the circumferential direction, and the lower ring plate 2 is divided into at least two second lifting zones in the circumferential direction. The first lifting zones and the second lifting zones correspond one-to-one. Furthermore, each first lifting zone is connected to the external lifting assembly in conjunction with the corresponding second lifting zone. The lifting assembly, in conjunction with the annular lifting lug 10 for large blast furnaces provided by this utility model, enables the lifting of the furnace shell 20 to be lifted.

[0038] In one specific embodiment of this utility model, at least one upper lifting point is provided in each first lifting zone, and at least one lower lifting point is provided in each second lifting zone. The upper lifting points and lower lifting points correspond one-to-one. Furthermore, each upper lifting point is connected to the steel strand 9 in the lifting assembly in conjunction with the corresponding lower lifting point, so as to realize the connection between the lifting assembly and the annular lifting lug 10 for large blast furnaces provided by this utility model.

[0039] Furthermore, to achieve the connection between the lifting points (including upper and lower lifting points) and the steel strands 9, each upper lifting point of the upper ring plate 1 is provided with an upper U-shaped groove 3, and each lower lifting point of the lower ring plate 2 is provided with a lower U-shaped groove 7. The upper U-shaped grooves 3 and the lower U-shaped grooves 7 correspond one-to-one. In addition, each upper U-shaped groove 3 and the corresponding lower U-shaped groove 7 is penetrated by a steel strand 9, and each lower U-shaped groove 7 is provided with an anchor plate 30 fixed to the corresponding steel strand 9 below it, so as to achieve a stable connection between the lifting assembly and the annular lifting lug 10 for large blast furnaces provided by this utility model.

[0040] In another specific embodiment of this utility model, to improve the support stability of the annular lifting lug 10 for large blast furnaces provided by this utility model, longitudinal stiffening plates 4 can be connected between each first lifting zone and the corresponding second lifting zone, thereby reinforcing the entire annular lifting lug 10. Further, the longitudinal stiffening plates 4 include ordinary stiffening plates and reinforced stiffening plates 6 arranged on both sides of the upper U-shaped slot 3 (i.e., the lower U-shaped slot 7), wherein the reinforced stiffening plates 6 are composed of multiple layers of ordinary stiffening plates; by setting the reinforced stiffening plates 6, the strength of the annular lifting lug 10 for large blast furnaces provided by this utility model at the positions on both sides of the upper U-shaped slot 3 (i.e., the lower U-shaped slot 7) is further improved.

[0041] To achieve the connection between the annular stiffening plate 5 and the longitudinal stiffening plate 4, the upper and lower sides of the annular stiffening plate 5 can be welded to the upper ring plate 1 and the lower ring plate 2 respectively, and the upper and lower sides of the longitudinal stiffening plate 4 can also be welded to the upper ring plate 1 and the lower ring plate 2 respectively.

[0042] On the other hand, in order to achieve the complete lifting of the entire furnace shell 20 to be lifted, the present invention also provides a large blast furnace lifting device, which includes an annular lifting lug 10 for a large blast furnace provided by the present invention and a lifting assembly connected to the annular lifting lug 10 for a large blast furnace.

[0043] Specifically, the lifting assembly may include an anchor plate 30, a hoist 50, and steel strands 9 connected below the hoist 50; wherein, steel strands 9 pass through each upper U-shaped slot 3 and the corresponding lower U-shaped slot 7; and an anchor plate 30 is fixedly connected to each steel strand 9 at the position below the corresponding lower U-shaped slot 7.

[0044] The following details the fabrication, installation, and lifting process of the annular lifting lug 10 for large blast furnaces provided by this utility model.

[0045] When manufacturing the annular lifting lug 10, it is necessary to first fabricate an upper ring plate 1 and a lower ring plate 2 of corresponding diameter using steel plates, based on the diameter of the lifting section of the furnace shell 20 to be lifted. The manufactured annular lifting lug 10 can be divided into multiple lifting zones (corresponding to the upper lifting zone on the upper ring plate 1 and the lower lifting zone on the lower ring plate 2), such as... Figure 1 The four lifting zones shown are arranged in a cross shape, and each lifting zone has multiple lifting points, such as... Figure 1 As shown, three lifting points are set. The upper ring plate 1 and the lower ring plate 2 have a U-shaped groove at each lifting point, forming an upper U-shaped groove 3 and a lower U-shaped groove 7, which are used to install the steel strand 9 and the anchor plate 30.

[0046] A longitudinal stiffener 4 and annular stiffener 5 are installed between the upper ring plate 1 and the lower ring plate 2. The upper and lower sides of the longitudinal stiffener 4 and the annular stiffener 5 are welded to the upper ring plate 1 and the lower ring plate 2 to increase the structural stability of the entire annular lifting lug 10. For the U-shaped slots (including the upper U-shaped slot 3 and the lower U-shaped slot 7), reinforced stiffener 6 (belonging to the longitudinal stiffener 4) needs to be installed on both sides. The upper and lower sides of the reinforced stiffener 6 are welded to the upper ring plate 1 and the lower ring plate 2 to increase the strength of the lifting point.

[0047] During installation, the annular lifting lug 10 is placed on the pre-set lifting belt of the blast furnace shell 20 and fixed, ensuring complete contact between the annular lifting lug 10 and the furnace shell 20. The upper ring plate 1, lower ring plate 2, and longitudinal stiffening plate 4 are all welded to the furnace shell 20, forming a rigid whole with the annular lifting lug 10.

[0048] During the installation of anchor plate 30, first lower the steel strand 9 to a suitable height, and then install the steel strand 9 from the outside of the annular lifting lug along the U-shaped groove inward. Anchor plate 30 is installed from the bottom of lower ring plate 2 and locked with steel strand 9; anchor plate 30 serves as a support point for lifting and contacts the bottom of lower ring plate 2 without welding.

[0049] During blast furnace hoisting, the hoisting beam 60 is installed on top of the furnace frame 70, and multiple units (such as...) are simultaneously hoisted... Figure 5 and Figure 6 The 12 hoists 50 shown are installed one by one at the designated position on the lifting beam 60; the blast furnace shell 20 is connected to the hoist 50 on the furnace top through annular lifting lugs, anchor plates 30, and steel strands 9. The hoist 50 executes the command of locking-lifting-locking-resetting-locking again and lifting again, and lifts the furnace shell 20 to the required height through repeated actions; after the furnace shell 20 is lifted and installed, the steel strands 9 together with the anchor plates 30 are taken out outward along the U-shaped groove.

[0050] As can be seen from the above specific embodiments, the annular lifting lug for large blast furnaces provided by this utility model has at least the following advantages:

[0051] 1. Compared with conventional independent lifting lugs, the annular lifting lug adopts an integral structure design; the annular lifting lug is in complete contact with the furnace shell, increasing the stress-bearing area, effectively reducing stress concentration problems, and increasing the stability of the lifting lug during use.

[0052] 2. In some applications of lifting thin-walled shells, the annular lifting lugs not only ensure uniform force distribution but also increase the rigidity of the thin-walled shell to a certain extent. The annular lifting lugs and the shell being lifted form a rigid whole, effectively preventing deformation during the lifting process.

[0053] 3. The ring-shaped lifting lugs are divided into multiple lifting areas, with multiple lifting points set in each lifting area. Each lifting point adopts a U-shaped groove design, which facilitates the installation and removal of steel strands and anchor plates, and can significantly improve construction efficiency.

[0054] 4. The annular lifting lug for large blast furnaces provided by this utility model improves the performance of the lifting lug simply by optimizing the structural form. It does not require the use of special materials, is highly practical and stable, and has great promotional value.

[0055] As referred above Figures 1 to 6An annular lifting lug and lifting device for a large blast furnace 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 annular lifting lug and lifting device for a large blast furnace 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 ring-shaped lifting lug for a large blast furnace, characterized in that, For fixing and sleeved on the furnace shell to be lifted, it includes an upper ring plate, a lower ring plate, and an annular stiffening plate; wherein, the annular stiffening plate is connected between the upper ring plate and the lower ring plate, the upper ring plate is divided into at least two first lifting zones in the circumferential direction, and the lower ring plate is divided into at least two second lifting zones in the circumferential direction, the first lifting zones and the second lifting zones correspond one-to-one; and each first lifting zone is connected to an external lifting component in conjunction with the corresponding second lifting zone.

2. The annular lifting lug for a large blast furnace as described in claim 1, characterized in that, Each first lifting zone has at least one upward lifting point, and each second lifting zone has at least one downward lifting point, with the upward lifting point and the downward lifting point corresponding one-to-one; and... Each upper lifting point is connected to the corresponding lower lifting point and the steel strand in the lifting assembly.

3. The annular lifting lug for a large blast furnace as described in claim 2, characterized in that, An upper U-shaped groove is formed at each upper lifting point of the upper ring plate, and a lower U-shaped groove is formed at each lower lifting point of the lower ring plate. The upper U-shaped grooves and the lower U-shaped grooves correspond one-to-one. The steel strands are threaded through each upper U-shaped groove and the corresponding lower U-shaped groove.

4. The annular lifting lug for a large blast furnace as described in claim 3, characterized in that, An anchor plate is installed below each lower U-shaped groove to fix the corresponding steel strand.

5. The annular lifting lug for a large blast furnace as described in claim 4, characterized in that, Longitudinal stiffeners connect each first lifting zone to its corresponding second lifting zone.

6. The annular lifting lug for a large blast furnace as described in claim 5, characterized in that, The longitudinal stiffeners include reinforced stiffeners disposed on both sides of the upper U-shaped groove.

7. The annular lifting lug for a large blast furnace as described in claim 5, characterized in that, The upper and lower sides of the annular stiffening plate are respectively welded to the upper annular plate and the lower annular plate; and / or, The upper and lower sides of the longitudinal stiffener are respectively welded to the upper ring plate and the lower ring plate.

8. A large blast furnace hoisting device, characterized in that, Includes an annular lifting lug for a large blast furnace as described in any one of claims 1 to 7, and a lifting assembly connected to the annular lifting lug for the large blast furnace.

9. The large blast furnace hoisting device as described in claim 8, characterized in that, The lifting assembly includes a hoist and steel strands connected below the hoist; wherein, The steel strands pass through each upper U-shaped groove and the corresponding lower U-shaped groove.

10. The large blast furnace hoisting device as described in claim 9, characterized in that, It also includes anchor plates, which are fixedly connected to each steel strand at the position below the corresponding lower U-shaped groove.

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