A pre-melting dosing device

Abstract

The present application relates to the technical fields of weighing and batching, in particular to a quantitative batching device before smelting, comprising a placing table, a plurality of weighing scales are installed on the placing table, a plurality of discharge boxes are assembled on the weighing scales, an installation support is fixedly connected to the placing table, three storage tanks are installed on the installation support, and a plurality of signboards are fixedly connected to the installation support, the device is provided with a guide plate capable of reciprocating and swinging at 0° to 60°, the feeding mode of traditional equipment is abandoned, and the qualified blocky batching after screening can be uniformly spread to the whole area of the discharge box through the reciprocating swing of the guide plate, the phenomenon of concentrated falling and local stacking of materials can be effectively avoided, the load bias of the weighing scale caused by stacking can be improved, the stress state of each detection point can be balanced, the measurement drift and numerical fluctuation caused by uneven stress can be reduced, the stability of weighing detection can be significantly improved, and a reliable batching measurement basis is provided for the forging and smelting process.

Description

Technical Field

[0001] This invention relates to the field of weighing and batching technology, specifically to a quantitative batching device before smelting. Background Technology

[0002] In the forging and smelting production process, the steel matrix and alloy materials such as ferrosilicon and ferromanganese are first put into the smelting furnace and melted at high temperature to form a molten steel with a composition that meets the process requirements. The molten steel is then cast into a metal billet, and pressure is applied to the high-temperature billet to complete the forging process and obtain the target forging product.

[0003] In the forging and smelting process, it is necessary to complete the quantitative weighing of various alloy materials such as ferrosilicon and ferromanganese according to the process ratio. The accuracy of the weighing directly determines the compositional stability and finished product quality of the workpiece after smelting. Most traditional batching equipment does not have a dedicated powder screening and removal structure. Fine powders such as ferrosilicon and ferromanganese mixed in the batching will enter the weighing station along with the blocky batching. On the one hand, the light powder is easy to cause the weighing value to be falsely high, resulting in measurement error. On the other hand, after the powder enters the smelting furnace with the blocky material, it is easy to be blown away by the high temperature flue gas in the furnace, reducing the actual recovery rate of alloy elements, and also generating oxide inclusions, increasing the probability of defects in the workpiece. Meanwhile, most existing material conveying mechanisms use a fixed guide for direct material drop. After the materials fall naturally, they tend to accumulate in a single location in the discharge box, causing uneven loading on the weighing scale and uneven force distribution at various detection points. This leads to metering drift and reduced weighing repeatability. In addition, powder flying during the batching and discharging process easily adheres to and accumulates on the inner wall of the storage tank. Over time, this accumulation can cause moisture absorption and caking, reducing the discharge flow cross-section and causing malfunctions such as jamming, blockage, and poor discharge. Existing equipment lacks an active cleaning structure for the powder accumulation on the inner wall of the storage tank, requiring manual disassembly and cleaning, which is cumbersome and affects the continuous operation of the batching process. Summary of the Invention

[0004] The purpose of this invention is to provide a quantitative batching device before smelting, in order to solve the problem that most traditional batching equipment mentioned in the background art does not have a dedicated powder screening and removal structure. Fine powders such as ferrosilicon and ferromanganese mixed in the batching will enter the weighing station along with the block batching. On the one hand, the light powder is easy to cause the weighing value to be falsely high, resulting in measurement error. On the other hand, after the powder enters the smelting furnace with the block material, it is easily blown away by the high temperature flue gas in the furnace, reducing the actual recovery rate of alloying elements, and will also produce oxide inclusions, increasing the probability of defects in the workpiece.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a quantitative batching device before smelting, comprising a placement platform, on which multiple weighing scales are installed, each weighing scale being equipped with a feeding box, a mounting bracket fixedly connected to the placement platform, three storage tanks mounted on the mounting bracket, multiple identification plates fixedly connected to the mounting bracket, a screening and equalization mechanism and a batching and cleaning mechanism being provided inside the storage tanks, the screening and equalization mechanism including a discharge port connected to the bottom of the storage tanks, a proportional solenoid valve being provided inside the discharge port, a conveying channel being fixedly connected to the discharge port, a vibrating plate being slidably connected inside the conveying channel, multiple sieve holes being opened on the vibrating plate, and a guide plate being rotatably connected to the end of the conveying channel.

[0006] Preferably, a plurality of tension springs are fixedly connected to the outer wall of the vibrating plate, and the ends of the plurality of tension springs away from the vibrating plate are fixedly connected to the inner wall of the material conveying channel. A top plate is fixedly connected to the outer wall of the vibrating plate.

[0007] Preferably, a bottom box is fixedly connected to the bottom of the material conveying channel, a second motor is fixedly connected to the outer wall of the bottom box, a transmission rod is fixedly connected to the output end of the second motor, a fan is fixedly connected to the end of the transmission rod away from the second motor, a driven rod is fixedly connected to the outer wall of the fan, and a cam is fixedly connected to the outer wall of the driven rod, with the cam located directly below the top plate.

[0008] Preferably, a sealing box is fixedly connected to the outer wall of the bottom box, a reciprocating screw is rotatably connected inside the sealing box, a reducer is installed between the reciprocating screw and the driven rod, a collar is threaded onto the outer wall of the reciprocating screw, a push plate is fixedly connected to the collar, the push plate slides through to the outside of the sealing box, and a rotating shaft is rotatably connected to the end of the push plate away from the collar, the rotating shaft is fixedly connected to the outer wall of the guide plate.

[0009] Preferably, the ingredient cleaning mechanism includes a horizontal plate fixedly connected to the outer wall of the storage tank, a first motor fixedly connected to the outer wall of the horizontal plate, and a vertical rod fixedly connected to the output end of the first motor.

[0010] Preferably, scrapers are fixedly connected to both sides of the vertical rod, and the scrapers slide in contact with the inner wall of the storage tank.

[0011] Preferably, the bottom box has multiple exhaust ports and an opening / closing door.

[0012] Preferably, a sealing element is installed inside the material conveying channel, and the other end of the sealing element is connected to the vibrating plate.

[0013] Compared with the prior art, the beneficial effects of the present invention are: 1. This device, by incorporating components such as a vibrating plate and a bottom box, can screen out fine powders during the batching and conveying process. The powder is then collected inside the bottom box under negative pressure, preventing it from flying around, improving the workshop working environment, and reducing dust safety hazards. Screening and removing powder not only prevents lightweight powder from entering the discharge box and causing inaccurate weighing, eliminating metering interference from powder and ensuring accurate weighing results, but also prevents powder from entering the smelting furnace and being damaged by high-temperature flue gas, reducing alloy element loss, minimizing steel oxidation and inclusion defects, stabilizing the batch composition, and improving the batch quality of forging products.

[0014] 2. This device is equipped with a guide plate that can reciprocate and oscillate from 0° to 60°, abandoning the traditional method of fixed-point vertical material feeding. The qualified blocky materials after screening can be evenly spread to the entire area of ​​the feeding box by the reciprocating oscillation of the guide plate, effectively avoiding the phenomenon of concentrated material falling and local material accumulation. It can improve the unbalanced load of the weighing scale caused by material accumulation, balance the stress state of each detection point, reduce the metering drift and numerical fluctuation caused by uneven stress, significantly improve the stability of weighing detection, and provide a reliable basis for batching and metering for the forging and smelting process.

[0015] 3. This device, by setting up components such as scrapers and vertical rods, can continuously scrape off the powder adhering to the inner wall of the storage tank through the rotation of the scraper, avoiding the powder from absorbing moisture and caking on the inner wall of the storage tank, preventing material jamming, blockage, and poor material discharge caused by the reduction of the discharge flow cross section, and ensuring the continuity of the entire batching process. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a side view of the present invention; Figure 3 This is a schematic diagram of the internal structure of the storage tank of the present invention; Figure 4 This is a schematic diagram of the material conveying channel structure of the present invention; Figure 5 This is a schematic diagram of the internal structure of the bottom box of the present invention; Figure 6 This is a schematic diagram of the planar structure of the present invention; Figure 7 This is a schematic diagram of the bottom box structure of the present invention; Figure 8 This is a schematic diagram of the cross-sectional structure of the material conveying channel of the present invention. Figure 1 ; Figure 9 This is a schematic diagram of the cross-sectional structure of the material conveying channel of the present invention. Figure 2 ; Figure 10 This is a schematic diagram of the external structure of the material conveying channel of the present invention.

[0017] In the attached diagram, the components represented by each number are as follows: 1. Placement platform; 2. Mounting bracket; 3. Storage tank; 4. Weighing scale; 5. Discharge box; 6. Guide plate; 7. Horizontal plate; 8. First motor; 9. Scraper; 10. Vertical rod; 11. Discharge port; 12. Conveying channel; 13. Base box; 14. Screen hole; 15. Vibrating plate; 16. Second motor; 17. Transmission rod; 18. Fan; 19. Driven rod; 20. Cam; 21. Sealing box; 22. Reducer; 23. Push plate; 24. Rotating shaft; 25. Reciprocating screw; 26. Tension spring; 27. Collar; 28. Exhaust port; 29. ​​Seal; 30. Top plate; 31. Identification plate; 32. Opening door. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] Example 1: Please refer to Figures 1-10 A quantitative batching device before smelting includes a placement platform 1, on which multiple weighing scales 4 are installed, and each weighing scale 4 is equipped with a feeding box 5. A mounting bracket 2 is fixedly connected to the placement platform 1, and three storage tanks 3 are installed on the mounting bracket 2. Multiple identification plates 31 are fixedly connected to the mounting bracket 2. The storage tanks 3 are equipped with a screening and equalization mechanism and a batching and cleaning mechanism. The screening and equalization mechanism includes a discharge port 11 connected to the bottom of the storage tank 3. A proportional solenoid valve is installed inside the discharge port 11. A conveying channel 12 is fixedly connected to the discharge port 11. A vibrating plate 15 is slidably connected inside the conveying channel 12. Multiple sieve holes 14 are opened on the vibrating plate 15. A guide plate 6 is rotatably connected to the end of the conveying channel 12.

[0020] Multiple tension springs 26 are fixedly connected to the outer wall of the vibrating plate 15. The ends of the multiple tension springs 26 away from the vibrating plate 15 are fixedly connected to the inner wall of the material conveying channel 12. A top plate 30 is fixedly connected to the outer wall of the vibrating plate 15.

[0021] A bottom box 13 is fixedly connected to the bottom of the material conveying channel 12. A second motor 16 is fixedly connected to the outer wall of the bottom box 13. A transmission rod 17 is fixedly connected to the output end of the second motor 16. A fan 18 is fixedly connected to the end of the transmission rod 17 away from the second motor 16. A driven rod 19 is fixedly connected to the outer wall of the fan 18. A cam 20 is fixedly connected to the outer wall of the driven rod 19. The cam 20 is located directly below the top plate 30.

[0022] A sealing box 21 is fixedly connected to the outer wall of the bottom box 13. A reciprocating screw 25 is rotatably connected inside the sealing box 21. A reducer 22 is installed between the reciprocating screw 25 and the driven rod 19. A collar 27 is threaded onto the outer wall of the reciprocating screw 25. A push plate 23 is fixedly connected to the collar 27. The push plate 23 slides through to the outside of the sealing box 21. A rotating shaft 24 is rotatably connected to the end of the push plate 23 away from the collar 27. The rotating shaft 24 is fixedly connected to the outer wall of the guide plate 6.

[0023] In this embodiment, before use, the operator can pre-fill the three sets of storage tanks 3 with alloy materials such as ferrosilicon and ferromanganese required for forging and smelting, and mark the material type and category inside each storage tank 3 on the surface of each identification plate 31. This achieves classified and zoned storage of materials, making it easy for operators to quickly and intuitively distinguish between different types of materials, effectively avoiding the problems of mis-taking, mis-matching, and misuse caused by human identification errors. After the materials are filled and stored, the operator places the material receiving box 5 stably on the detection station of the weighing scale 4, completing the precise positioning of the material receiving component and preparing for subsequent automated quantitative batching operations. After the preparation work is completed, when it is necessary to take materials for proportioning operations, the operator can open the proportional solenoid valve inside the discharge port 11. After the proportional solenoid valve is activated, the ingredients stored inside the storage tank 3 will fall steadily under their own weight and accurately fall onto the surface of the vibrating plate 15 inside the conveying channel 12 through the discharge port 11. During the synchronous process of the feeding operation, the operator can start the second motor 16, which drives the transmission rod 17 to rotate continuously. During the rotation of the transmission rod 17, the fan 18 and the driven rod 19 rotate synchronously on the same axis. As the driven rod 19 drives the cam 20 to rotate continuously, when the protruding structure of the cam 20 contacts the bottom of the top plate 30, it can push the top plate 30 upward, thereby driving the vibrating plate 15 to overcome the elastic tension of multiple sets of tension springs 26 and move upward as a whole. When the protruding structure of the cam 20 rotates away from the top plate 30 with the driven rod 19, the vibrating plate 15 moves upward in multiple... Under the reset force of the tension spring 26, the plate quickly moves downward to reset. The intermittent pushing action of the cam 20, combined with the elastic reset of the tension spring 26, causes the vibrating plate 15 to form continuous and stable high-frequency reciprocating vibration within the conveying channel 12. During the vibration of the vibrating plate 15, multiple evenly distributed screen holes 14 on the plate surface dynamically vibrate and screen the falling materials, effectively removing mixed powder. Simultaneously with the vibrating screening operation, the continuously rotating fan 18 creates a stable negative pressure suction inside the bottom box 13. Fine powder screened by the screen holes 14 quickly passes through the screen holes 14 under negative pressure and enters the bottom box 13 for centralized collection and storage, preventing the fine powder from scattering and flying during screening, and reducing equipment malfunctions caused by dust accumulation. To mitigate safety hazards in production, this device precisely screens out substandard ultrafine powders, preventing inflated weighing caused by lightweight powders falling into the discharge box 5. It also eliminates metering interference from powder adulteration, ensuring the authenticity and accuracy of weighing data for each batch. Taking ferrosilicon powder as an example, this device can pre-screen out mixed fine ferrosilicon powder, preventing it from entering the melting furnace with qualified lumpy materials. This also prevents the ferrosilicon powder from being carried away and lost by high-temperature flue gas during high-temperature smelting, effectively reducing silicon loss, increasing the actual recovery rate of alloying elements, and preventing the actual silicon content in the molten steel from deviating from the preset process ratio. Simultaneously, it avoids oxide inclusion defects generated by high-temperature oxidation of powders, significantly reducing quality problems such as slag inclusions and porosity in forgings, stabilizing the composition of smelting batches, and reducing batch composition fluctuations.This ensures comprehensive consistency in batch quality and production stability for subsequent forging products.

[0024] Referring to the above principle, when the driven rod 19 drives the cam 20 to rotate, the reducer 22 will slow down the reciprocating screw 25 (this is existing technology and will not be elaborated further). When the reciprocating screw 25 rotates slowly, it can drive the collar 27 to make a smooth and slow reciprocating linear motion along the axis of the reciprocating screw 25. During the reciprocating movement, the collar 27 is continuously pushed by the pusher plate 23, which drives the guide plate 6 to achieve regular reciprocating tumbling and oscillating from 0° to 60°. The qualified blocky material after being screened and impurity removed by the vibrating plate 15 can rely on the dynamic movement of the guide plate 6. The material is stably conveyed to the inside of the discharge box 5 by a change in tilt angle, and finally the weighing scale 4 completes the accurate weighing and collection. The feeding method of the guide plate 6 continuously swinging back and forth changes the concentrated material falling mode of vertical free fall. It can evenly distribute and convey the ingredients to the entire range of the discharge box 5, effectively avoiding the problem of concentrated material falling and local accumulation, improving the weighing load problem caused by single-point material accumulation, balancing the force state of each detection point of the weighing scale 4, avoiding defects such as measurement drift and numerical fluctuation caused by uneven force, and improving the stability, repeatability and accuracy of the weighing detection of the weighing scale 4.

[0025] Example 2: Please refer to Figures 1-10 The batching and cleaning mechanism includes a horizontal plate 7 fixedly connected to the outer wall of the storage tank 3, a first motor 8 fixedly connected to the outer wall of the horizontal plate 7, and a vertical rod 10 fixedly connected to the output end of the first motor 8.

[0026] Scrapers 9 are fixedly connected to both sides of the vertical rod 10, and the scrapers 9 slide in contact with the inner wall of the storage tank 3.

[0027] The bottom box 13 has multiple exhaust ports 28 and an opening and closing door 32.

[0028] The material conveying channel 12 is equipped with a seal 29, and the other end of the seal 29 is connected to the vibrating plate 15.

[0029] In this embodiment, as the ingredients are continuously fed into the feeding box 5, the weighing scale 4 collects the material weight data in real time and feeds it back to the built-in PLC controller to achieve closed-loop precise material control. When the weight of the ingredients inside the feeding box 5 reaches 80% of the preset weight, the PLC controller automatically adjusts the opening of the proportional solenoid valve inside the discharge port 11 to slightly reduce the material flow area and decrease the material conveying flow rate. When the weight of the ingredients further reaches 90% of the preset weight, the controller fine-tunes the opening of the proportional solenoid valve again to further slow down the feeding speed, adopting a graded feeding logic of gradually reducing the speed. The material continues to be fed until the weight reaches the target. At this point, the proportional solenoid valve inside the discharge port 11 is completely closed, and the second motor 16 stops running simultaneously (this is existing technology and will not be elaborated further). This graded feeding mode can achieve high-flow-rate and rapid feeding in the early stage of batching, improving the efficiency of batching operations. In the late stage of batching, low-speed micro-feeding can prevent overshoot and ensure the high-precision quantitative batching requirements. After multiple discharge boxes 5 have completed accurate batching and accurate weighing operations, the qualified batched materials can be uniformly put into the smelting process to ensure the basic accuracy of materials in subsequent smelting and forging production.

[0030] When storing forging materials such as ferrosilicon and ferromanganese in storage tank 3, the materials themselves inevitably contain fine powder. During the continuous feeding process at the discharge port 11, the airflow of the falling material will carry the fine powder flying and scattering inside storage tank 3, causing a large amount of powder to continuously adhere and accumulate on the inner wall surface of storage tank 3. The powder adhering to the inner wall of storage tank 3 is very easy to absorb moisture from the workshop air and become damp and caking, which greatly reduces the material flow cross section inside storage tank 3, frequently causing equipment failures such as material jamming, blockage, and poor material feeding, seriously affecting continuous batching operations. When it is necessary to clean the powder adhering to the inner wall of storage tank 3, the first motor 8 can be started, which drives the vertical rod 10 to rotate, thereby driving the scraper 9 to rotate synchronously inside storage tank 3, scraping and cleaning the accumulated powder adhering to the inner wall of storage tank 3 at high speed, and timely removal of residual powder can prevent the powder from absorbing moisture and caking.

[0031] It should be noted that the material conveying channel 12 is designed with a small inclination angle. When the material is discharged from the outlet 11 into the material conveying channel 12, the material can only be conveyed in an orderly manner by the continuous vibration excitation of the vibrating plate 15. The material has weak self-flow power and strong static retention. Once the material is stopped from the outlet 11 and the vibrating plate 15 stops vibrating, the material remaining in the material conveying channel 12 will lose its flow power and remain stably inside the material conveying channel 12. It will not continue to slide into the discharge box 5 due to inertia, thus preventing the weighing overshoot caused by the delayed discharge of residual material and effectively ensuring the accuracy and stability of each batch weighing.

[0032] It should be noted that the sealing element 29 is made of aging-resistant, highly elastic rubber corrugated expansion sleeve material, which has excellent adaptive deformation performance. During the high-frequency vibration operation of the vibrating plate 15, the sealing element 29 can follow the reciprocating movement of the vibrating plate 15 to complete adaptive expansion and contraction, always maintaining the airtightness of the connection between the material conveying channel 12 and the bottom box 13, ensuring that the negative pressure suction inside the bottom box 13 can draw the powder through the screen holes 14, ensuring the stability and reliability of powder screening and collection. At the same time, when the screened powder accumulated inside the bottom box 13 reaches a certain capacity, the powder accumulation can be cleaned by flipping and opening the opening and closing door 32. The operation is convenient and can empty the accumulated powder in time, ensuring the long-term continuous and stable operation of the equipment.

Claims

1. A pre-melting quantitative batching device, comprising a placement platform (1), characterized in that: Multiple weighing scales (4) are installed on the placement platform (1), and each of the multiple weighing scales (4) is equipped with a feeding box (5). An installation bracket (2) is fixedly connected to the placement platform (1), and three storage tanks (3) are installed on the installation bracket (2). Multiple identification plates (31) are fixedly connected to the installation bracket (2). A screening and equalization mechanism and a batching and cleaning mechanism are provided inside the storage tank (3). The screening and equalization mechanism includes a discharge port (11) connected to the bottom of the storage tank (3). A proportional solenoid valve is provided inside the discharge port (11). A conveying channel (12) is fixedly connected to the discharge port (11). A vibrating plate (15) is slidably connected inside the conveying channel (12). Multiple sieve holes (14) are opened on the vibrating plate (15). A guide plate (6) is rotatably connected to the end of the conveying channel (12).

2. The quantitative batching device before smelting according to claim 1, characterized in that: Multiple tension springs (26) are fixedly connected to the outer wall of the vibrating plate (15). The ends of the multiple tension springs (26) away from the vibrating plate (15) are fixedly connected to the inner wall of the material conveying channel (12). A top plate (30) is fixedly connected to the outer wall of the vibrating plate (15).

3. The quantitative batching device before smelting according to claim 1, characterized in that: The bottom of the material conveying channel (12) is fixedly connected to a bottom box (13), and a second motor (16) is fixedly connected to the outer wall of the bottom box (13). A transmission rod (17) is fixedly connected to the output end of the second motor (16). A fan (18) is fixedly connected to the end of the transmission rod (17) away from the second motor (16). A driven rod (19) is fixedly connected to the outer wall of the fan (18). A cam (20) is fixedly connected to the outer wall of the driven rod (19). The cam (20) is located directly below the top plate (30).

4. The quantitative batching device before smelting according to claim 3, characterized in that: A sealing box (21) is fixedly connected to the outer wall of the bottom box (13). A reciprocating screw (25) is rotatably connected inside the sealing box (21). A reducer (22) is installed between the reciprocating screw (25) and the driven rod (19). A collar (27) is threaded onto the outer wall of the reciprocating screw (25). A push plate (23) is fixedly connected to the collar (27). The push plate (23) slides through to the outside of the sealing box (21). A rotating shaft (24) is rotatably connected to the end of the push plate (23) away from the collar (27). The rotating shaft (24) is fixedly connected to the outer wall of the guide plate (6).

5. The quantitative batching device before smelting according to claim 1, characterized in that: The mixing and cleaning mechanism includes a horizontal plate (7) fixedly connected to the outer wall of the storage tank (3), a first motor (8) fixedly connected to the outer wall of the horizontal plate (7), and a vertical rod (10) fixedly connected to the output end of the first motor (8).

6. The quantitative batching device before smelting according to claim 5, characterized in that: Both sides of the vertical rod (10) are fixedly connected to scrapers (9), and the scrapers (9) slide in contact with the inner wall of the storage tank (3).

7. The quantitative batching device before smelting according to claim 3, characterized in that: The bottom box (13) is provided with multiple exhaust ports (28) and an opening and closing door (32).

8. The quantitative batching device before smelting according to claim 1, characterized in that: The material conveying channel (12) is equipped with a sealing element (29), and the other end of the sealing element (29) is connected to the vibrating plate (15).

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