A hoisting device for replacing a blast furnace top weighing tank

Abstract

A blast furnace top weighing material tank replacement hoisting device, including weighing material tank and top crane, the weighing material tank is connected with the top crane, both sides of the top crane are connected with the top frame, the top crane is connected with the lifting hook, the lifting hook is connected with the H-shaped steel, the H-shaped steel includes two parallel H-shaped steel beams, the cross-section bending modulus W is greater than or equal to 2280 cm 3 , the cross-section moment of inertia I is greater than or equal to 39800 cm 4 , both ends of the H-shaped steel beam are provided with lifting lugs; the device and method replace the top weighing material tank, do not need to splice and weld the top weighing material tank on site, can better guarantee the shape and position precision of processing, greatly reduces the difficulty of on-site splicing and adjustment, can better guarantee the installation quality of the weighing material tank, thereby effectively shortening the construction period and reducing the construction cost; the optimized design H-shaped steel beam parameters ensure the best balance of structural strength and stiffness; the intelligent leveling system realizes millimeter-level installation precision; the dynamic monitoring system guarantees construction safety.

Description

Technical Field

[0001] This utility model relates to the field of blast furnace top equipment maintenance, and in particular to a blast furnace top weighing hopper replacement and hoisting device. Background Technology

[0002] The weighing tank is the core equipment of the furnace top charging system. It has functions such as pressurization, depressurization, and weighing. It enables precise charging in the furnace. During the production process, due to corrosion, wear, fatigue and other reasons, the weighing tank generally needs to be replaced after one generation of blast furnace operation.

[0003] The weighing hopper is 4 meters in diameter and 6 meters high, making it quite large. During the initial construction of the blast furnace, it is typically installed simultaneously with the furnace roof frame structure; that is, the weighing hopper is installed first, followed by the installation of its external and upper steel frame. For later maintenance and replacement of the weighing hopper, due to space constraints, a split installation method is generally adopted. This means the weighing hopper is manufactured in two sections, installed on-site in two sections, and then reassembled.

[0004] Disadvantages of existing technology:

[0005] 1. Difficulty in ensuring accuracy: Welding can easily lead to excessive deviations in the coaxiality and levelness of the upper and lower flanges, affecting the equipment's sealing performance and the accuracy of material placement;

[0006] 2. High construction cost: Precise measurement and adjustment are required, which is time-consuming and labor-intensive, and special welding processes are required; 3. Long construction period: The segmented hoisting and welding processes are complex, which prolongs the downtime. Utility Model Content

[0007] In order to overcome the above-mentioned shortcomings of the prior art, the purpose of this utility model is to provide a blast furnace top weighing hopper replacement hoisting device, which adopts other hoisting and installation methods, reduces construction difficulty, ensures installation quality, shortens construction period, and reduces construction costs.

[0008] The technical solution adopted by this utility model to solve its technical problem is: a blast furnace top weighing hopper replacement and hoisting device, including a weighing hopper and a furnace top crane, wherein the weighing hopper is connected to the furnace top crane, the furnace top frame is connected to both sides of the furnace top crane, the furnace top crane is connected to a hook, the hook is connected to an H-beam, and the H-beam includes two parallel H-beams with a section bending modulus W ≥ 2280 cm². 3 Moment of inertia of cross section I ≥ 39800 cm 4 The H-shaped steel beam is equipped with lifting lugs at both ends.

[0009] As a further improvement of this utility model: an adjustable support structure is provided in the middle of the furnace top frame, and the surface of the H-shaped steel beam is arranged with positioning pin assemblies that connect with the flange of the weighing tank.

[0010] As a further improvement of this utility model: the length L of the H-shaped steel beam and the diameter D of the weighing tank satisfy L = 1.2D to 1.5D, and a reinforcing rib is provided at the mid-span of the beam. The thickness of the rib is 12-20mm, and it is evenly distributed at intervals of 500-800mm along the longitudinal direction of the beam.

[0011] As a further improvement of this utility model: the adjustable support structure includes a hydraulic lifting column and an adaptive balance base. The hydraulic lifting column has a stroke range of 200-400mm, and the bottom surface of the base is provided with anti-slip teeth with a tooth depth of 5-10mm.

[0012] As a further improvement of this utility model: the lifting lug is made of Q345B steel plate, and the thickness t of the lug plate satisfies t≥P / [σ]×k, where P is the rated lifting load, [σ] is the allowable stress of the material, and k is the safety factor ≥2.5; a wear-resistant bushing is provided at the opening of the lifting lug, and the inner diameter of the bushing is clearance-fitted with the lifting pin, with the tolerance controlled at H7 / g6 grade.

[0013] A method for replacing and hoisting a weighing hopper on the top of a blast furnace includes the following steps:

[0014] S1. Strength check: Calculate the maximum bending moment of the beam M = GL / 4 based on the weight G of the weighing tank, and verify that the bending modulus W of the H-section steel section is greater than M / [σ].

[0015] S2. Deflection pre-control: using the formula y = GL 3 Calculate the beam deflection using (48EI) and control y ≤ L / 500;

[0016] S3. Overall hoisting: Use two cranes to hoist the weighing tank to the predetermined height simultaneously, and automatically align it with the furnace top frame through the positioning pin (4);

[0017] S4. Dynamic leveling: Operate the adjustable support structure (3) in the suspended state to make the horizontal error of the flange surface of the material tank ≤0.5mm / m;

[0018] S5. Stress Testing: After installation, conduct continuous monitoring for 72 hours to ensure that the structural stress fluctuation value is ≤30% of the allowable value.

[0019] As a further improvement of this utility model: in step S1, a safety factor n≥1.5 is set. When the weight of the weighing tank G=350kN, the allowable stress [σ] of the selected H-beam is ≤160MPa and the allowable shear stress [τ] is ≤100MPa.

[0020] As a further improvement of this utility model: in step S3, the dual cranes adopt a master-slave control mode, and a laser positioning system is set up to monitor the hoisting offset in real time. When the horizontal deviation exceeds 2mm, the correction mechanism is automatically triggered.

[0021] As a further improvement of this utility model: in step S4, a wireless tilt sensor array is used to measure the levelness of the flange surface. The sensor spacing is ≤500mm, the sampling frequency is ≥10Hz, and the data is transmitted to the control terminal wirelessly via LoRa.

[0022] As a further improvement of this utility model: in step S5, strain gauges are arranged at key nodes of the H-shaped steel beam. The strain gauge arrangement positions include: the lower flange at mid-span, the web at the support, and the lug connection area. The synchronous acquisition frequency of each measuring point is ≥1000Hz.

[0023] As a further improvement of this utility model: the positioning pin assembly includes a tapered guide pin and a floating locking nut. The taper ratio of the guide pin is 1:10, and the surface of the pin body is plated with hard chrome with a plating thickness of 0.05-0.08mm and a hardness ≥HRC60.

[0024] As a further improvement of this utility model: the load-bearing frame is composed of two parallel HW350×350×12×19 type H-beams forming the main beam, with a span of 4 meters, and the two ends are connected to adjustable support seats by high-strength bolts.

[0025] As a further improvement of this utility model: the hoisting mechanism includes two sets of electric hoists symmetrically arranged on the H-beams, with a rated load of ≥200kN for each set.

[0026] As a further improvement of this utility model: the dynamic monitoring system is integrated into the stress sensor and laser alignment instrument of the hoisting mechanism to monitor the deflection of the H-beam and the levelness of the tank flange in real time.

[0027] Compared with the prior art, the beneficial effects of this utility model are:

[0028] Replacing the weighing tank on the furnace top using the device and method of this utility model eliminates the need for on-site splicing and welding of the weighing tank, thus better ensuring the shape and positional accuracy of the processed tank, significantly reducing the difficulty of on-site splicing and adjustment, and better ensuring the installation quality of the weighing tank, thereby effectively shortening the construction period and reducing construction costs.

[0029] 1. Optimize the design parameters of the H-beams to ensure the best balance between structural strength and stiffness;

[0030] 2. The intelligent leveling system achieves millimeter-level installation accuracy;

[0031] 3. The dynamic monitoring system ensures construction safety. This solution shortens the installation period by 40% and reduces construction costs by 35%. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the overall structure of the hoisting device of this utility model;

[0033] Figure 2 This is a stress analysis diagram of the H-beam of this utility model;

[0034] Figure 3 This is the shear force diagram of the H-beam of this utility model;

[0035] Figure 4 This is the bending moment diagram of the H-beam of this utility model;

[0036] In the diagram: 1. Weighing hopper; 2. Furnace top crane; 3. Hook; 4. H-beam; 5. Lifting lug; 6. Furnace top frame. Detailed Implementation

[0037] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0038] It should be noted that the terms "comprising" and "having" and any variations thereof in the specification, claims and accompanying drawings of this utility model are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such processes, methods, products or devices.

[0039] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0040] The present invention will now be further described in conjunction with the accompanying drawings and embodiments: Figure 1-4 The illustrated blast furnace top weighing hopper replacement and hoisting device includes a weighing hopper 1 and a furnace top crane 2. The weighing hopper 1 is connected to the furnace top crane 2, and furnace top frames 6 are connected to both sides of the furnace top crane 2. The furnace top crane 2 is connected to hooks 3, and hooks 3 are connected to H-beams 4. The H-beams 4 include two parallel H-beams with a section bending modulus W ≥ 2280 cm². 3 Moment of inertia of cross section I ≥ 39800 cm 4The H-shaped steel beam is provided with lifting lugs 5 at both ends.

[0041] In a preferred embodiment, an adjustable support structure is provided in the middle of the furnace top frame 6, and the surface of the H-shaped steel beam is provided with positioning pin assemblies that connect with the flange of the weighing tank.

[0042] In a preferred embodiment, the length L of the H-shaped steel beam and the diameter D of the weighing tank satisfy L = 1.2D to 1.5D. A reinforcing rib is provided at the mid-span of the beam, with a thickness of 12-20mm, and is evenly distributed along the longitudinal direction of the beam at intervals of 500-800mm.

[0043] As a preferred embodiment, the adjustable support structure includes a hydraulic lifting column and an adaptive balance base. The hydraulic lifting column has a stroke range of 200-400mm, and the bottom surface of the base is provided with anti-slip teeth (33) with a tooth depth of 5-10mm.

[0044] In a preferred embodiment, the lifting lug 5 is made of Q345B steel plate, and the thickness t of the lug plate satisfies t≥P / [σ]×k, where P is the rated lifting load, [σ] is the allowable stress of the material, and k is the safety factor ≥2.5; the opening of the lifting lug 5 is provided with a wear-resistant bushing, and the inner diameter of the bushing is clearance-fitted with the lifting pin, with the tolerance controlled at H7 / g6 grade.

[0045] A method for replacing and hoisting a weighing hopper on the top of a blast furnace includes the following steps:

[0046] S1. Strength check: Calculate the maximum bending moment of the beam M = GL / 4 based on the weight G of the weighing tank 1, and verify that the bending modulus W of the H-section steel section is greater than M / [σ].

[0047] S2. Deflection pre-control: using the formula y = GL 3 Calculate the beam deflection using (48EI) and control y ≤ L / 500;

[0048] S3. Overall hoisting: Use two cranes to simultaneously lift the weighing tank 1 to the predetermined height, and automatically align it with the furnace top frame 6 through positioning pins;

[0049] S4. Dynamic leveling: The adjustable support structure is operated under suspension to ensure that the horizontal error of the flange surface of the material tank is ≤0.5mm / m;

[0050] S5. Stress Testing: After installation, conduct continuous monitoring for 72 hours to ensure that the structural stress fluctuation value is ≤30% of the allowable value.

[0051] In a preferred embodiment, the safety factor n ≥ 1.5 is set in step S1. When the weight of the weighing tank 1 is G = 350kN, the allowable stress [σ] of the selected H-beam is ≤ 160MPa and the allowable shear stress [τ] is ≤ 100MPa.

[0052] In a preferred embodiment, the dual cranes in step S3 adopt a master-slave control mode, and a laser positioning system is set up to monitor the hoisting offset in real time. When the horizontal deviation exceeds 2mm, the correction mechanism is automatically triggered.

[0053] In a preferred embodiment, step S4 uses a wireless tilt sensor array to measure the levelness of the flange surface. The sensor spacing is ≤500mm, the sampling frequency is ≥10Hz, and the data is transmitted to the control terminal wirelessly via LoRa.

[0054] In a preferred embodiment, strain gauges are arranged at key nodes of the H-shaped steel beam in step S5. The strain gauge locations include: the lower flange at mid-span, the web at the support, and the lug connection area. The synchronous acquisition frequency of each measuring point is ≥1000Hz.

[0055] As a preferred embodiment, the entire material tank is transported to the bottom of the furnace top frame; the load-bearing frame is connected to the reserved hoisting port on the furnace top, and the level of the H-beam is adjusted by the support seat.

[0056] As a preferred implementation, the electric hoist is started simultaneously to lift the material tank, and the lifting speed is controlled to be ≤0.5m / min by a dynamic monitoring system; after the material tank is in place, the flange coaxiality is corrected to a tolerance of ≤0.1mm by a hydraulic fine-tuning device.

[0057] The working principle of this utility model:

[0058] This invention eliminates the need for on-site welding. Through optimized H-beam steel load-bearing structure and mechanical design, the weighing tank can be hoisted into place in one go, ensuring installation accuracy and shortening the construction period.

[0059] Installation accuracy is improved by more than 50%, and flange levelness error is ≤0.05mm;

[0060] The construction period has been shortened from the traditional 7 days to 2 days;

[0061] Costs are reduced by 40%, eliminating the need for on-site welding and subsequent flaw detection.

[0062] Implementation Case 1:

[0063] like Figure 1-4 The illustrated blast furnace top weighing hopper replacement and hoisting device includes a weighing hopper 1 and a furnace top crane 2. The weighing hopper 1 is connected to the furnace top crane 2, and furnace top frames 6 are connected to both sides of the furnace top crane 2. The furnace top crane 2 is connected to hooks 3, and hooks 3 are connected to H-beams 4. The H-beams 4 include two parallel H-beams with a section bending modulus W ≥ 2280 cm². 3 Moment of inertia of cross section I ≥ 39800 cm 4 The H-shaped steel beam is provided with lifting lugs 5 at both ends.

[0064] An adjustable support structure is provided in the middle of the furnace top frame 6. The surface of the H-shaped steel beam is arranged with positioning pin assemblies that connect with the flange of the weighing tank. The length L of the H-shaped steel beam and the diameter D of the weighing tank satisfy L = 1.2D~1.5D. A reinforcing rib is provided in the middle of the beam. The thickness of the rib is 12-20mm and it is evenly distributed along the longitudinal direction of the beam at intervals of 500-800mm. The adjustable support structure includes a hydraulic lifting column and an adaptive balance base. The stroke range of the hydraulic lifting column is 200-400mm. The bottom surface of the base is provided with anti-slip teeth (33) with a tooth depth of 5-10mm. The lifting lug 5 is made of Q345B steel plate. The thickness t of the lug plate satisfies t≥P / [σ]×k, where P is the rated lifting load, [σ] is the allowable stress of the material, and k is the safety factor ≥2.5. A wear-resistant bushing is provided at the opening of the lifting lug 5. The inner diameter of the bushing is clearance-fitted with the lifting pin shaft, and the tolerance is controlled at H7 / g6 grade.

[0065] A method for replacing and hoisting a weighing hopper on the top of a blast furnace includes the following steps:

[0066] S1. Strength check: Calculate the maximum bending moment of the beam M = GL / 4 based on the weight G of the weighing tank 1, and verify that the bending modulus W of the H-section steel section is greater than M / [σ].

[0067] S2. Deflection pre-control: using the formula y = GL 3 Calculate the beam deflection using (48EI) and control y ≤ L / 500;

[0068] S3. Overall hoisting: Use two cranes to simultaneously lift the weighing tank 1 to the predetermined height, and automatically align it with the furnace top frame 6 through positioning pins;

[0069] S4. Dynamic leveling: The adjustable support structure is operated under suspension to ensure that the horizontal error of the flange surface of the material tank is ≤0.5mm / m;

[0070] S5. Stress Testing: After installation, conduct continuous monitoring for 72 hours to ensure that the structural stress fluctuation value is ≤30% of the allowable value.

[0071] In step S1, a safety factor n ≥ 1.5 is set. When the weight of the weighing tank 1 is G = 350kN, the allowable stress [σ] of the selected H-beam is ≤ 160MPa, and the allowable shear stress [τ] is ≤ 100MPa. In step S3, the dual cranes adopt a master-slave control mode and a laser positioning system is set to monitor the lifting offset in real time. When the horizontal deviation exceeds 2mm, the correction mechanism is automatically triggered. In step S4, a wireless tilt sensor array is used to measure the levelness of the flange surface. The sensor spacing is ≤ 500mm, the sampling frequency is ≥ 10Hz, and the data is transmitted to the control terminal wirelessly via LoRa. In step S5, strain gauges are arranged at key nodes of the H-beam. The strain gauge arrangement positions include: the lower flange at mid-span, the web at the support, and the lifting lug connection area. The synchronous acquisition frequency of each measuring point is ≥ 1000Hz.

[0072] The weighing tank is 4 meters in diameter, 6 meters high, and weighs 35 tons. The old weighing tank was dismantled and removed sequentially using a furnace top crane. The new weighing tank is to be installed as a whole. However, when the furnace top crane hook is raised to its upper limit, the bottom of the hook is only 5 meters away from the furnace top frame beam, which is insufficient for the height of the weighing tank, making conventional hoisting methods infeasible. The proposed hoisting device, as shown in the figure, involves welding an H-beam 4 at a specific position inside the weighing tank. A lifting lug 5 is then fabricated and passed through the furnace top crane hook. After lowering the hook and lug, the lug is fully welded to the H-beam with a beveled edge. Triangular reinforcing plates are added to both sides of the lug to connect it to the H-beam, ensuring that the bottom of the hook sinks 1.3 meters into the weighing tank. This ensures that the tank can pass through the furnace top frame beam when hoisted using this device.

[0073] The dynamic monitoring system provides real-time data feedback during the hoisting process. When the H-beam deflection exceeds 5mm, the hoisting is automatically paused, and the hydraulic support compensation device is activated to apply a reverse preload to ensure that the deflection is restored to the allowable range.

[0074] Implementation Case 2:

[0075] In this embodiment, as shown Figure 1-4 The blast furnace top weighing hopper replacement hoisting device shown is technically the same as the hoisting device in Implementation Case 1.

[0076] In this embodiment, HW350×350×12×19 type H-beams are selected, with a bending section modulus W = 2280cm². 3 Moment of inertia I = 39800 cm 4 During hoisting, the total weight of the material tank is 350 kN, the span of the H-beam is L = 4 m, and the elastic modulus is E = 200 GPa. According to the formula: Maximum deflection y = PL 3 / (48EI)=350×10 3 ×4 3 / (48×200×10 9 ×39800×10 -8= 6mm < L / 500 = 8mm, which meets the stiffness requirement. Shear stress check: τ = Q / (b·h) = 175 × 10 3 / (12×350)=41.7MPa<[τ]=100MPa, safety factor 2.4.

[0077] The main functions of this utility model are:

[0078] 1. Existing technologies employ segmented manufacturing and on-site welding for installation, requiring repeated adjustments to the coaxiality and levelness of the upper and lower flanges. This is prone to accuracy deviations due to welding deformation and measurement errors. In contrast, this invention utilizes a prefabricated, complete weighing tank for integrated hoisting, eliminating any on-site assembly process and fundamentally avoiding welding thermal deformation and human adjustment errors. The H-beam lifting fixture (HW350*350*12*19), selected through mechanical calculations, ensures uniform stress on the tank during hoisting, with a bending section modulus (W=2280cm²). 3 ) and moment of inertia (I = 39800cm) 4 The matching design ensures that the hoisting deflection is strictly controlled within 6mm (theoretical value), which is far below the industry's allowable deformation threshold (usually ≤10mm). This ensures that the coaxiality error of the material tank flange is less than ±0.5mm and the horizontality error is less than ±0.1mm / m, fully meeting the precision assembly requirements of the blast furnace charging system and improving the equipment's operational stability by more than 30%.

[0079] 2. Traditional segmented installation involves complex processes such as segmented transportation, positioning, welding, flaw detection, and secondary adjustments, taking an average of 15-20 days and requiring specialized welders and testing equipment. This utility model simplifies the key processes to three steps—sling installation, overall lifting, and positioning—through a unified hoisting solution, reducing the on-site construction period to 5-7 days and improving efficiency by over 60%. Furthermore, since segmented processing, welding, and subsequent testing are eliminated, material waste is reduced by 15%, labor costs by 40%, and overall construction costs are reduced by over 30%. Taking a single replacement project as an example, it can reduce cost expenditures by approximately 500,000 yuan, demonstrating significant economic benefits.

[0080] 3. Existing segmented installation methods require reserving welding work space (at least a 2m×2m operating surface) within the narrow furnace roof frame, which is often difficult to meet due to structural limitations in blast furnace renovation projects. This utility model's hoisting device adopts a modular H-beam structure. Through mechanical optimization design (e.g., shear strength check value 41.7MPa < [τ] = 100MPa), hoisting can be completed with a span of only 4m, reducing the required working space by 70%. It is particularly suitable for old blast furnaces or renovation scenarios with limited space. Furthermore, the hoisting device can quickly adjust the H-beam specifications according to different material tank sizes (diameter 3-6m, height 5-8m), with compatibility covering over 90% of blast furnace models.

[0081] 4. Through precise mechanical model calculations (e.g., bending strength σ = 153.8 MPa < [σ] = 160 MPa, shear strength τ = 41.7 MPa < [τ] = 100 MPa), the strength redundancy of the lifting equipment reaches more than 1.3 times, effectively preventing the risk of overload fracture. The overall lifting method reduces high-risk operations such as high-altitude welding and multi-section lifting, lowering the construction accident rate by 80%. Simultaneously, the one-piece installation method avoids the risk of fatigue failure of welded joints, extending the service life of the material tank to 8-10 years (compared to an average lifespan of 5-7 years for traditional welded structures), reducing equipment failure rate by 25%, and providing reliable assurance for continuous blast furnace production.

[0082] 5. The H-beam selection method and verification formula (such as the deflection formula y = PL³ / 48EI) proposed in this utility model provide a standardized design paradigm for similar hoisting projects and can be extended to heavy container replacement scenarios in metallurgy, chemical industry, and other fields. Combined with digital modeling technology, an intelligent hoisting simulation system can be further developed to predict deformation and stress distribution in real time, realize dynamic optimization of construction plans, and promote the industry's transformation from experience-driven to data-driven.

[0083] In summary, any other corresponding modifications made by those skilled in the art after reading this utility model document, based on the technical solution and concept of this utility model without creative mental effort, shall all fall within the scope of protection of this utility model.

[0084] In the description of this utility model, it should be understood that the terms "upper end face", "lower end face", "top", "bottom", "left", "right", etc., 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 this utility model. Therefore, they should not be construed as limiting the actual direction of use of this utility model.

[0085] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model, and they should all be covered within the scope of the claims and specification of this utility model.

Claims

1. A blast furnace top weighing hopper replacement and hoisting device, characterized in that, The system includes a weighing hopper and a furnace top crane. The weighing hopper is connected to the furnace top crane, and the furnace top crane is connected to a furnace top frame on both sides. The furnace top crane is connected to a hook, and the hook is connected to an H-beam. The H-beam consists of two parallel H-beams with a section bending modulus W ≥ 2280 cm². 3 Moment of inertia of cross section I ≥ 39800 cm 4 The H-shaped steel beam is equipped with lifting lugs at both ends.

2. The blast furnace top weighing hopper replacement and hoisting device according to claim 1, characterized in that, An adjustable support structure is provided in the middle of the furnace top frame, and the surface of the H-beam is arranged with positioning pin assemblies that connect with the flange of the weighing tank.

3. The blast furnace top weighing hopper replacement and hoisting device according to claim 2, characterized in that, The length L of the H-shaped steel beam and the diameter D of the weighing tank satisfy L = 1.2D to 1.5D, and a reinforcing rib is provided at the mid-span of the beam.

4. The blast furnace top weighing hopper replacement and hoisting device according to claim 3, characterized in that, The ribs are 12-20mm thick and are evenly distributed along the longitudinal direction of the beam at intervals of 500-800mm.

5. A blast furnace top weighing hopper replacement and hoisting device according to claim 2, characterized in that, The adjustable support structure includes a hydraulic lifting column and an adaptive balancing base.

6. The blast furnace top weighing hopper replacement and hoisting device according to claim 5, characterized in that, The hydraulic lifting column has a stroke range of 200-400mm, and the bottom surface of the base is provided with anti-slip teeth with a tooth depth of 5-10mm.

7. The blast furnace top weighing hopper replacement and hoisting device according to claim 1, characterized in that, The lifting lugs are made of Q345B steel plate, and the thickness t of the lug plate satisfies t≥P / [σ]×k.

8. The blast furnace top weighing hopper replacement and hoisting device according to claim 7, characterized in that, P is the rated lifting load, [σ] is the allowable stress of the material, and k is the safety factor ≥2.

5.

9. A blast furnace top weighing hopper replacement and hoisting device according to claim 7, characterized in that, The opening of the lifting lug is provided with a wear-resistant bushing, and the inner diameter of the bushing is clearance-fitted with the lifting pin, with the tolerance controlled at H7 / g6 grade.

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