Hopper for converter steelmaking

Abstract

The invention discloses a hopper for converter steelmaking, relates to the technical field of converter steelmaking, and aims to solve the problem that components of molten steel fluctuate due to the fact that an existing hopper cannot perform quantitative blanking. A mounting frame is arranged on the right side outside the hopper body, a quantitative discharging mechanism is arranged on the mounting frame, and the outside is further connected with a top plate which is connected with a bottom plate through a connecting rod. The quantitative discharging mechanism comprises a vibrating screen assembly and a discharging baffle. The vibrating screen assembly is composed of a screen plate, a cam set, a motor, a first spring and the like and can filter large-particle raw materials. The discharging baffle rotates at a constant speed through a motor, a driving wheel, a driven wheel and belt transmission, and quantitative discharging is achieved. A sealing mechanism is arranged at the top of the top plate, comprises an extension ring, a sliding cover, a sliding clamping rod, a spring II and the like and is used for sealing the top of the hopper. The blanking amount can be accurately controlled, the stability of molten steel components is guaranteed, impurities can be filtered, and sealing is reliable.

Description

Technical Field

[0001] The invention relates to the technical field of converter steelmaking, in particular to a hopper for converter steelmaking. Background Art

[0002] Converter steelmaking hoppers are used to store bulk raw materials such as iron ore, scrap steel, lime, and dolomite. After being transported from mines and scrap steel recycling yards to the steel mill, these raw materials are temporarily stored in the hoppers, awaiting their addition to the converter for steelmaking. The hoppers can be used to sort and store raw materials according to their type and characteristics, facilitating subsequent proportional access.

[0003] In the prior art, the upper part of some hoppers is a silo, which is used to store various materials required for steelmaking, such as ferroalloys, slag-forming agents, deoxidizers, etc. The silo has a certain volume and shape design, which can store a certain amount of materials according to production needs and ensure the stability and fluidity of the materials in the silo.

[0004] During the steelmaking process, the addition of various alloying elements and additives must be precisely controlled to achieve the desired steel grade's composition. If the hopper fails to deliver the material in a quantitative manner, the amount of alloying elements added will fluctuate, causing significant fluctuations in the molten steel's composition. This makes it difficult to meet the precise composition standards for different steel grades, affecting the uniformity of the steel's performance. To address these issues, a hopper for converter steelmaking has been proposed. Summary of the Invention

[0005] The object of the present invention is to provide a hopper for converter steelmaking to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned object, the present invention provides the following technical solution: a hopper for converter steelmaking, comprising a hopper body, a mounting frame fixedly connected to the right side of the exterior of the hopper body, a quantitative discharge mechanism mounted on the mounting frame, a top plate fixedly connected to the exterior of the hopper body, a plurality of connecting rods fixedly connected to the bottom of the top plate, and the other ends of all the connecting rods fixedly connected to the bottom plate;

[0007] The quantitative unloading mechanism includes a vibrating screen assembly and a unloading baffle. The vibrating screen assembly is used to filter large-particle raw materials. The unloading baffle is located below the vibrating screen assembly near the discharge port. The unloading baffle rotates at a constant speed to achieve quantitative unloading.

[0008] Preferably, the vibrating screen assembly includes a sieve plate arranged in the hopper body, and a cam group is arranged below the sieve plate. The cam group is fixed in series through a rotating shaft and driven to rotate by a motor fixed on the mounting frame. The cam group hits the bottom of the sieve plate when rotating, and the sieve plate is elastically connected to the hopper body.

[0009] Preferably, a fixed plate is fixedly connected to the inside of the hopper body, the fixed plate and the sieve plate are connected in series and limited by a sliding rod, a spring is sleeved on the sliding rod, and the spring is located between the fixed plate and the sieve plate.

[0010] Preferably, the unloading baffle is fixed by a connecting shaft, the end of the connecting shaft passes through the hopper body and is fixedly installed with a driven wheel, the driving wheel is installed at the motor drive end, and the driving wheel and the driven wheel are driven by a belt.

[0011] Preferably, a sealing mechanism is installed on the top of the top plate, and the sealing mechanism is used to seal the top of the hopper body.

[0012] Preferably, the sealing mechanism includes an extension ring fixed on the top plate, a sliding groove is provided at the bottom of the inner wall of the extension ring, two semicircular sliding covers are inserted into the sliding groove, the two semicircular sliding covers are paired to form a full circle, each sliding cover can slide out from the opening provided in the side wall of the extension ring, and a sliding rod is provided at the opening of the extension ring to prevent the sliding cover from moving.

[0013] Preferably, a cavity is provided in the extension ring, the sliding card rod passes through the cavity, a second spring is provided in the cavity, the second spring is sleeved on the sliding card rod and rests on the upper limit plate of the sliding card rod.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. Achieve precise quantitative feeding to ensure stable composition of molten steel

[0016] This invention utilizes a fixed-feed mechanism with a feed baffle that cooperates with the transmission structure (driving pulley, driven pulley, and belt). A motor drives the feed baffle to rotate at a constant speed, periodically opening and closing the discharge port. This allows precise control of the amount of raw material falling per unit time. This effectively addresses the problem of fluctuating molten steel composition caused by unstable feed rates in existing technologies, ensuring that the amounts of alloying elements and additives added meet the composition requirements of the target steel grade, thereby improving the uniformity of steel properties.

[0017] 2. Filter large particles of raw materials to improve the quality of raw materials

[0018] The vibrating screen assembly, driven by a motor and a cam assembly, produces a continuous up-and-down vibration in the screen plate, which, in conjunction with the elastic action of spring 1, efficiently screens the raw materials. Small particles that meet the required particle size pass through the screen holes, while larger impurities are intercepted. This prevents large particles from entering the converter and affecting steelmaking reaction efficiency or steel quality, ensuring the particle size consistency of the input raw materials.

[0019] 3. Reliable sealing to protect the raw material storage environment

[0020] The top sealing mechanism, with two semicircular sliding covers working in conjunction with the slide grooves of the extension ring, allows for flexible opening and closing of the hopper top. A sliding latch, activated by a second spring, stably blocks the movement of the sliding cover, ensuring a secure seal. This effectively prevents moisture, contamination, or scattering of raw materials during storage, ensuring raw material purity and storage stability, while reducing waste and quality risks.

[0021] 4. Integrated drive design reduces energy consumption and maintenance costs

[0022] The cam group of the vibrating screen assembly and the transmission structure of the discharge baffle share the same motor drive, which reduces the number of power components and reduces the energy consumption of the equipment. At the same time, the connection structure of each component is simple (such as belt drive, spring elastic connection, etc.), which facilitates daily inspection and maintenance and extends the service life of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a three-dimensional schematic diagram of a converter steelmaking hopper proposed by the present invention;

[0024] Figure 2 This is a schematic diagram of the internal structure of a converter steelmaking hopper proposed by the present invention;

[0025] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0026] Figure 4 This is a schematic structural diagram of a sliding cover in a converter steelmaking hopper proposed by the present invention;

[0027] Figure 5 for Figure 4 Enlarged view of point B in the middle.

[0028] In the figure: 1. Hopper body; 2. Mounting frame; 3. Motor; 4. Driving wheel; 5. Connecting shaft; 6. Unloading baffle; 7. Driven wheel; 8. Belt; 9. Cam assembly; 10. Screen plate; 11. Fixed plate; 12. Sliding rod; 13. Spring 1; 14. Top plate; 15. Connecting rod; 16. Bottom plate; 17. Extension ring; 18. Sliding cover; 19. Opening; 20. Sliding clamping rod; 21. Cavity; 22. Limiting plate; 23. Spring 2. DETAILED DESCRIPTION

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the implementation regulations described are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0030] The present invention discloses a hopper for converter steelmaking, which includes a hopper body 1, which serves as the main body for storing and processing raw materials; a mounting frame 2 is fixedly connected to the right side of the outside of the hopper body 1, which is used to carry the driving components of the quantitative feeding mechanism; a top plate 14 is also fixedly connected to the outside of the hopper body 1, and the bottom of the top plate 14 is fixedly connected to the bottom plate 16 through multiple evenly distributed connecting rods 15, forming a stable support structure to enhance the stability of the entire hopper.

[0031] like Figure 2 As shown, the quantitative discharge mechanism is the core part of the hopper, which is used to realize the screening and quantitative feeding of raw materials, including a vibrating screen component and a discharge baffle 6.

[0032] The vibrating screen assembly is used to filter large particles of impurities in the raw materials to ensure that the particle size of the raw materials fed into the converter meets the requirements. Its specific structure includes:

[0033] Sieve plate 10: It is horizontally arranged inside the hopper body 1, with evenly distributed sieve holes on its surface. The aperture is designed according to the particle size requirements of the raw materials and is used to carry and screen the raw materials.

[0034] Cam group 9: It is composed of multiple cams of the same specifications connected in series through a rotating shaft and is horizontally arranged just below the sieve plate 10. The end of the rotating shaft of the cam group 9 is connected to the output end of the motor 3 fixed on the mounting frame 2 and is driven to rotate by the motor 3;

[0035] like Figure 3 As described, an elastic connection structure is provided between the sieve plate 10 and the hopper body 1, specifically as follows: a horizontal fixed plate 11 is fixed inside the hopper body 1, the fixed plate 11 is located above the sieve plate 10, and the two are connected in series through a plurality of vertical sliding rods 12, the top of the sliding rod 12 is fixed to the fixed plate 11, and the bottom end passes through the sieve plate 10, and the two ends of the sliding rod 12 form a limit to prevent the sieve plate 10 from falling off, and a spring 13 is provided on the sliding rod 12, and the two ends of the spring 13 respectively abut against the bottom of the fixed plate 11 and the top of the sieve plate 10, so that the sieve plate 10 and the hopper body 1 form an elastic connection.

[0036] When the motor 3 is started, the cam assembly 9 rotates synchronously with the shaft. During the rotation, the raised portion of the cam periodically hits the bottom of the sieve plate 10, forcing the sieve plate 10 to move upward. At the same time, the spring 13 is compressed due to the upward movement of the sieve plate 10, generating a downward elastic force. When the raised portion of the cam leaves the sieve plate 10, the elastic force of the spring 13 drives the sieve plate 10 to reset downward. In this cycle, the sieve plate 10 produces continuous up and down vibrations. During the vibration, the raw materials fall through the sieve holes. The raw materials that meet the particle size requirements, while the large particles of impurities are intercepted on the sieve plate 10, thus achieving the screening of the raw materials.

[0037] The discharge baffle 6 is located below the vibrating screen assembly and at the discharge port of the hopper body 1, and is used to control the amount of raw materials fed after screening. The specific implementation method is as follows:

[0038] Transmission structure: The center of the unloading baffle 6 is fixedly connected to the connecting shaft 5, which passes horizontally through the side wall of the hopper body 1, and a driven wheel 7 is fixedly installed on its protruding end; the driving end of the motor 3 is also fixedly installed with a driving wheel 4, and a transmission connection is formed between the driving wheel 4 and the driven wheel 7 through a belt 8.

[0039] Quantitative feeding principle: When motor 3 is operating, driving pulley 4 rotates at a constant speed along with the motor output. This, in turn, drives driven pulley 7 via belt 8, which in turn drives connecting shaft 5 and discharge baffle 6 to rotate at a constant speed. Because the dimensions of discharge baffle 6 match the discharge opening, its rotation periodically "opens" and "closes" the discharge opening. When the baffle is misaligned with the discharge opening, the material falls; when the baffle covers the discharge opening, the material stops falling. By controlling the speed of motor 3, the rotation speed of discharge baffle 6 can be precisely controlled, thereby achieving stable control of the amount of material delivered per unit time and achieving quantitative feeding.

[0040] like Figure 4 and 5 As shown, a sealing mechanism is provided on the top of the hopper to seal the top opening 19 of the hopper body 1 to prevent the raw materials from getting wet or foreign matter from entering. The specific structure and operation are as follows:

[0041] The sealing mechanism includes an extension ring 17 fixed to the top plate 14. The extension ring 17 is coaxial with the top opening 19 of the hopper body 1, and an annular slide groove is provided at the bottom of its inner wall; two semicircular sliding covers 18 are inserted into the slide groove, and the edges of the two sliding covers 18 are adapted to the slide groove and can slide along the slide groove. When the two are fully pushed in, they can be spliced ​​into a complete circle, which just covers the top opening 19 of the hopper.

[0042] Openings 19 are respectively provided on the side walls of the extension ring 17 at positions corresponding to the two sliding covers 18, and the sliding covers 18 can slide out from the openings 19 to open the hopper; a cavity 21 is provided inside the extension ring 17 at a position corresponding to the opening 19, and a sliding clamping rod 20 passes horizontally through the cavity 21, one end of which can be extended to the opening 19 to block the sliding cover 18, and the other end is located outside the extension ring 17 for easy operation; a limit plate 22 is fixed on the sliding clamping rod 20, and a spring 23 is also provided in the cavity 21. The spring 23 is sleeved on the sliding clamping rod 20, and its two ends respectively abut the inner wall of the cavity 21 and the limit plate 22, so that the sliding clamping rod 20 keeps blocking the sliding cover 18 under normal conditions.

[0043] When in use, the sliding card rod 20 is pulled outward, the limit plate 22 compresses the spring 23, and the end of the card rod is separated from the opening 19, and the two sliding covers 18 can be slid out from the opening 19, and the top of the hopper is opened for feeding; after the feeding is completed, the sliding covers 18 are pushed back into the slide groove and spliced ​​into a circle, the sliding card rod 20 is released, and the spring 23 is reset to push the card rod to block the sliding cover 18 again to achieve sealing.

[0044] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A hopper for converter steelmaking, comprising a hopper body (1), characterized in that: The right side of the exterior of the hopper body (1) is fixedly connected to a mounting frame (2), a quantitative discharge mechanism is installed on the mounting frame (2), the exterior of the hopper body (1) is fixedly connected to a top plate (14), the bottom of the top plate (14) is fixedly connected to a plurality of connecting rods (15), and the other ends of all the connecting rods (15) are fixedly connected to a bottom plate (16); The quantitative unloading mechanism comprises a vibrating screen assembly and a unloading baffle (6). The vibrating screen assembly is used to filter large-particle raw materials. The unloading baffle (6) is located below the vibrating screen assembly near the discharge port. The unloading baffle (6) rotates at a constant speed to achieve quantitative unloading.

2. The converter steelmaking hopper according to claim 1, characterized in that: The vibrating screen assembly includes a screen plate (10) arranged in a hopper body (1), a cam group (9) arranged below the screen plate (10), the cam group (9) being fixed in series via a rotating shaft and driven to rotate by a motor (3) fixed on a mounting frame (2), the cam group (9) hitting the bottom of the screen plate (10) when rotating, and the screen plate (10) being elastically connected to the hopper body (1).

3. The converter steelmaking hopper according to claim 2, characterized in that: A fixed plate (11) is fixedly connected to the interior of the hopper body (1), and the fixed plate (11) and the sieve plate (10) are connected in series and limited by a sliding rod (12). A spring (13) is sleeved on the sliding rod (12), and the spring (13) is located between the fixed plate (11) and the sieve plate (10).

4. The converter steelmaking hopper according to claim 1, characterized in that: The unloading baffle (6) is fixed by a connecting shaft (5), the end of the connecting shaft (5) passes through the hopper body (1) and is fixedly installed with a driven wheel (7), the driving end of the motor (3) is installed with a driving wheel (4), and the driving wheel (4) and the driven wheel (7) are driven by a belt (8).

5. The converter steelmaking hopper according to claim 1, characterized in that: A sealing mechanism is installed on the top of the top plate (14), and the sealing mechanism is used to seal the top of the hopper body (1).

6. The converter steelmaking hopper according to claim 5, characterized in that: The sealing mechanism includes an extension ring (17) fixed on the top plate (14), a slide groove is provided at the bottom of the inner wall of the extension ring (17), two semicircular sliding covers (18) are inserted into the slide groove, and the two semicircular sliding covers (18) are paired to form a full circle, each sliding cover (18) can slide out from an opening (19) provided on the side wall of the extension ring (17), and a sliding clamping rod (20) is provided at the opening of the extension ring (17) for preventing the sliding cover (18) from moving.

7. The converter steelmaking hopper according to claim 6, characterized in that: A cavity (21) is provided in the extension ring (17), the sliding clamping rod (20) passes through the cavity (21), a second spring (23) is provided in the cavity (21), and the second spring (23) is sleeved on the sliding clamping rod (20) and abuts against the upper limit plate (22) of the sliding clamping rod (20).

Images