Screening device for producing steel shots

Abstract

The utility model relates to the technical field of steel shot production, in particular to a screening device for producing steel shots, which comprises a fixed frame, a screening barrel is arranged above the fixed frame, a plurality of screening holes are formed in the lower half part of the screening barrel, a stirring mechanism is arranged in the screening barrel, and the stirring mechanism is connected with the screening barrel. Two supporting plates are symmetrically and fixedly mounted at the two ends of the screening barrel, supporting sliding grooves which are in limiting sliding connection with the supporting plates are symmetrically formed in the opposite inner sides of the fixing frame, a mounting box is fixedly mounted on the outer side of one end of the fixing frame, and a sliding rheostat is arranged in the mounting box. The stirring speed of the stirring blades is changed through the slide rheostat and the coupler, the purpose of changing the rotating speed of the stirring blades according to the weight of steel shots in the screening barrel is achieved, the screening quality of the steel shots is guaranteed, the possibility that the steel shots are damaged during screening is reduced, and the screening efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of steel shot production technology, specifically to a screening device for steel shot production. Background Technology

[0002] Screening is a crucial step in the production of steel shot, aiming to separate steel shot of different sizes to ensure its quality meets the requirements of subsequent applications. During screening, two methods are typically used to force the steel shot through the screen mesh: agitation and vibration. Both methods effectively help the steel shot fall through the screen mesh, but adjustments need to be made based on specific circumstances during actual operation.

[0003] Agitation is the mechanical process of stirring steel shot to ensure its uniform flow through the sieve and ultimately its passage through the sieve openings. However, different agitation speeds are required for different weight groups of steel shot. Lighter weight groups should use lower agitation speeds; excessive agitation can lead to overly violent collisions between the shot particles, especially small ones, which are prone to breakage or deformation, thus affecting the shot quality and particle size distribution. Heavier weight groups require appropriately higher agitation speeds. Insufficient agitation may prevent the shot from passing through the sieve openings smoothly, resulting in incomplete sieving and impacting subsequent processing, ultimately ensuring successful passage through the sieve. Utility Model Content

[0004] In view of the above-mentioned shortcomings of the existing technology, the present invention provides a screening device for steel shot production, which can effectively solve the problem that the screening effect is poor and the quality of steel shot is affected by different stirring speeds when screening steel shot with stirring assistance in the existing technology.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] This utility model provides a screening device for steel shot production, including a fixed frame, a screening barrel arranged above the fixed frame, a plurality of screening holes in the lower half of the screening barrel, a stirring mechanism arranged inside the screening barrel, two support plates symmetrically fixedly installed at both ends of the screening barrel, and support grooves symmetrically opened on opposite inner sides of the fixed frame, which are respectively limited and slidably connected to each support plate. A mounting box is fixedly installed on the outer side of one end of the fixed frame, and a sliding rheostat is arranged inside the mounting box. The sliding rheostat includes a sliding plate slidably installed on one side of the mounting box. The end of the sliding plate away from the mounting box moves through the side wall of the fixed frame and is fixedly connected to one of the support plates. The sliding rheostat is drivenly connected to the stirring mechanism. The sliding rheostat is electrically connected to a DC power supply and forms a transmission ratio circuit. During the sliding of the sliding plate toward the bottom wall of the support groove, the resistance of the sliding rheostat in the transmission ratio circuit decreases.

[0007] According to the above-mentioned steel shot production screening device, the stirring mechanism includes a motor fixedly installed on the outside of the screening barrel, and the motor is located at the end of the screening barrel near the sliding plate. A main rotating shaft is fixedly installed at the output end of the motor. The end of the main rotating shaft away from the motor movably passes through the side wall of the screening barrel and is fixedly connected to a coupling. A driven rotating shaft is fixedly connected at the output end of the coupling. Two connecting rings are fixedly installed on the outside of the driven rotating shaft, and stirring blades are fixedly installed between the two connecting rings.

[0008] According to the above-mentioned screening device for producing steel shot, the coupling is a magnetorheological fluid transmission, and the coupling is connected in the transmission ratio circuit and connected in series with the sliding rheostat.

[0009] According to the above-mentioned screening device for producing steel shot, a pair of sliding columns are fixedly installed inside the support chute. Each pair of sliding columns passes through the corresponding support plate and is slidably connected to it. A spring is fitted on the outside of the sliding column. The top end of the spring is fixedly connected to the bottom wall of the support plate, and the bottom end of the spring is fixedly connected to the inner bottom wall of the support chute.

[0010] According to the above-mentioned screening device for producing steel shot, the top of the screening barrel is fixedly connected to a feeding channel, and the top of the fixed frame is provided with a placement box, which is placed directly below the screening barrel.

[0011] According to the above-mentioned screening device for producing steel shot, two protective plates are symmetrically fixedly installed at both ends of the screening barrel, and the protective plates are inclined.

[0012] The technical solution provided by this utility model has the following advantages compared with the known prior art:

[0013] In this invention, when the motor drives the stirring blades to rotate via the main shaft, coupling, and driven by the shaft to screen and stir the steel shot inside the screening barrel, the sliding plate slides on the sliding rheostat, changing the current in the transmission ratio circuit, which in turn changes the magnetic field strength of the coupling. This achieves the purpose of changing the rotation speed of the stirring blades according to the weight of the steel shot inside the screening barrel, which not only ensures the screening quality of the steel shot and reduces the possibility of damage to the steel shot during screening, but also improves the screening efficiency. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0016] Figure 2 This is a schematic diagram of the front cross-sectional structure of the handle of this utility model;

[0017] Figure 3 This is a schematic diagram of the structure of the screening barrel, support plate and spring of this utility model;

[0018] Figure 4 This is a schematic diagram of the structure of the motor, the rotating shaft, and the stirring blades of this utility model.

[0019] Reference numerals in the attached drawings: 1. Fixed frame; 2. Screening barrel; 21. Screening hole; 3. Support plate; 31. Support chute; 4. Mounting box; 5. Sliding vane; 6. Motor; 7. Main shaft; 8. Coupling; 9. Driven shaft; 10. Connecting ring; 11. Stirring blade; 12. Sliding column; 13. Spring; 14. Feeding channel; 15. Placement box; 16. Protective plate. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0021] The present invention will be further described below with reference to the embodiments.

[0022] Example: Refer to Figures 1 to 4 A steel shot screening device includes a fixed frame 1, a screening barrel 2 mounted above the fixed frame 1, and a feed channel 14 fixedly connected to the top of the screening barrel 2. Steel shot to be screened is fed into the screening barrel 2 through the feed channel 14. A placement box 15 is mounted on the top of the fixed frame 1 and positioned directly below the screening barrel 2. The placement box 15 is used to hold the steel shot screened out by the screening barrel 2. The lower half of the screening barrel 2 has multiple screening holes 21. Two protective plates 16 are symmetrically fixedly mounted at both ends of the screening barrel 2, and the protective plates 16 are inclined to prevent the steel shot from falling into the placement box when screened out. The outside of the 15 guides the steel shot to fall smoothly into the inside of the placement box 15. The inside of the screening barrel 2 is equipped with a stirring mechanism. Two support plates 3 are symmetrically fixedly installed at both ends of the screening barrel 2. The inner sides of the fixing frame 1 are symmetrically provided with support grooves 31 that are respectively limited and slidably connected to each support plate 3. A pair of sliding columns 12 are fixedly installed inside the support grooves 31. Each pair of sliding columns 12 passes through the corresponding support plate 3 and is slidably connected to it. A spring 13 is fitted on the outside of the sliding column 12. The top end of the spring 13 is fixedly connected to the bottom wall of the support plate 3, and the bottom end of the spring 13 is fixedly connected to the inner bottom wall of the support groove 31. The spring 13 is used to support the screening barrel 2 through the support plates 3. The fixing frame 1 An installation box 4 is fixedly installed on the outer side of one end of the frame. A sliding rheostat is installed inside the installation box 4. The sliding rheostat includes a sliding plate 5 slidably installed on one side of the installation box 4. The end of the sliding plate 5 away from the installation box 4 movably passes through the side wall of the fixed frame 1 and is fixedly connected to one of the support plates 3. The sliding rheostat is connected to the stirring mechanism for transmission. The sliding rheostat is electrically connected to a DC power supply and forms a transmission ratio circuit. As the sliding plate 5 slides towards the bottom wall of the support groove 31, the resistance of the sliding rheostat in the transmission ratio circuit decreases. When steel shot is added to the screening barrel 2 through the feed channel 14, the spring 13 is compressed under the influence of the weight of the steel shot, and the support plate 3 will move along the support groove 31. As the internal structure slides downwards, the support plate 3 also slides relative to the sliding column 12. The sliding column 12 makes the support plate 3 slide more steadily. When the support plate 3 slides, it drives the sliding plate 5 to slide synchronously. When the sliding plate 5 slides downwards on the sliding rheostat, the resistance of the sliding rheostat in the transmission ratio circuit decreases and the current increases. The increase in current enhances the magnetic field strength of the stirring mechanism, thereby changing the stirring speed of the stirring mechanism. This achieves the purpose of changing the stirring speed according to the different weights of the steel shot, thus avoiding over-stirring or insufficient stirring force during stirring, improving the screening efficiency of the steel shot, and reducing the possibility of steel shot damage due to the mismatch between the stirring speed and the weight of the steel shot.

[0023] The stirring mechanism includes a motor 6 fixedly installed on the outside of the screening tank 2, with the motor 6 positioned at the end of the screening tank 2 closest to the sliding vane 5. A main shaft 7 is fixedly installed at the output end of the motor 6. The end of the main shaft 7 furthest from the motor 6 movably passes through the side wall of the screening tank 2 and is fixedly connected to a coupling 8. The coupling 8 is a magnetorheological fluid transmission type, connected in a transmission ratio circuit and in series with a sliding rheostat. A driven shaft 9 is fixedly connected to the output end of the coupling 8. Two connecting rings 10 are fixedly installed on the outside of the driven shaft 9, and stirring blades 11 are fixedly installed between the two connecting rings 10. When screening the steel shot inside the screening tank 2, the motor 6 drives the main shaft 7 to rotate, and the main shaft 7 then drives the driven shaft 9 to rotate via the coupling 8. As the driven shaft 9 rotates, it passes through… The connecting ring 10 drives the stirring blade 11 to rotate, thereby turning and stirring the steel shot inside the screening barrel 2. The resistance of the sliding rheostat in the transmission ratio circuit decreases, and the current increases. This increased current strengthens the magnetic field strength of the coupling 8. The coupling 8 contains magnetorheological fluid, a smart material that can significantly change its rheological properties under the influence of a magnetic field. As the magnetic field strength of the coupling 8 increases, the viscosity of the magnetorheological fluid is further enhanced, strengthening the connection between the main shaft 7 and the driven shaft 9. This increases the rotational speed of the driven shaft 9, allowing the stirring blade 11 to have different stirring speeds depending on the weight of the steel shot inside the screening barrel 2. This achieves the purpose of changing the stirring speed of the stirring blade 11 according to the weight of the steel shot.

[0024] The working principle of this utility model is as follows:

[0025] When steel shot is added into the screening barrel 2 through the feeding channel 14, the motor 6 drives the main shaft 7 to rotate. The main shaft 7 then drives the driven shaft 9 to rotate through the coupling 8. When the driven shaft 9 rotates, it drives the stirring blades 11 to rotate through the connecting ring 10 to tumble and stir the steel shot inside the screening barrel 2, allowing the steel shot inside the screening barrel 2 to fall into the placement box 15 through the screening hole 21. Under the influence of the weight of the steel shot, the spring 13 is compressed, and the support plate 3 slides down inside the support groove 31. At the same time, the support plate 3 also slides relative to the sliding column 12. The sliding column 12 makes the sliding of the support plate 3 more stable. When the support plate 3 slides, it drives the sliding plate 5 to slide synchronously. When the sliding plate 5 slides downward on the sliding rheostat, the resistance of the sliding rheostat in the transmission ratio circuit decreases, and the current increases. The increase in current enhances the magnetic field strength of coupling 8. Coupling 8 contains magnetorheological fluid, a smart material that can significantly change its rheological properties under the action of a magnetic field. As the magnetic field strength of coupling 8 increases, the viscosity of the magnetorheological fluid is further enhanced, which strengthens the connection between the main shaft 7 and the driven shaft 9. The rotational speed of the driven shaft 9 increases, and thus, when the weight of steel shot inside screening tank 2 is different, the stirring blade 11 can have different stirring speeds. This achieves the purpose of changing the stirring speed of stirring blade 11 according to the weight of steel shot, thereby avoiding over-stirring or insufficient stirring force when stirring blade 11 is stirring, improving the screening efficiency of steel shot, and reducing the possibility of steel shot damage due to the mismatch between stirring speed and steel shot weight.

[0026] 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 of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of this utility model.

Claims

1. A screening device for producing steel shot, characterized in that, The system includes a fixed frame (1), a screening barrel (2) is provided above the fixed frame (1), the lower half of the screening barrel (2) has multiple screening holes (21), a stirring mechanism is provided inside the screening barrel (2), two support plates (3) are symmetrically fixedly installed at both ends of the screening barrel (2), and support grooves (31) are symmetrically opened on the inner side of the fixed frame (1) and are respectively limited and slidably connected to each support plate (3). An installation box (4) is fixedly installed on the outer side of one end of the fixed frame (1). The internal part is equipped with a sliding rheostat, which includes a slider (5) that is slidably mounted on one side of the mounting box (4). The end of the slider (5) away from the mounting box (4) moves through the side wall of the fixed frame (1) and is fixedly connected to one of the support plates (3). The sliding rheostat is driven by the stirring mechanism. The sliding rheostat is electrically connected to a DC power supply and forms a transmission ratio circuit. During the sliding process of the slider (5) towards the bottom wall of the support groove (31), the resistance of the sliding rheostat in the transmission ratio circuit decreases.

2. The screening device for producing steel shot according to claim 1, characterized in that, The stirring mechanism includes a motor (6) fixedly installed on the outside of the screening barrel (2), and the motor (6) is located at one end of the screening barrel (2) near the sliding plate (5). The output end of the motor (6) is fixedly installed with a main rotating shaft (7). The end of the main rotating shaft (7) away from the motor (6) movably passes through the side wall of the screening barrel (2) and is fixedly connected to a coupling (8). The output end of the coupling (8) is fixedly connected to a driven rotating shaft (9). Two connecting rings (10) are fixedly installed on the outside of the driven rotating shaft (9). A stirring blade (11) is fixedly installed between the two connecting rings (10).

3. A screening device for producing steel shot according to claim 2, characterized in that, The coupling (8) is a magnetorheological fluid transmission, and the coupling (8) is connected in the transmission ratio circuit and connected in series with the sliding rheostat.

4. A screening device for producing steel shot according to claim 3, characterized in that, A pair of sliding columns (12) are fixedly installed inside the support groove (31). Each pair of sliding columns (12) passes through the corresponding support plate (3) and is slidably connected to it. A spring (13) is fitted on the outside of the sliding column (12). The top end of the spring (13) is fixedly connected to the bottom wall of the support plate (3), and the bottom end of the spring (13) is fixedly connected to the inner bottom wall of the support groove (31).

5. A screening device for producing steel shot according to claim 1, characterized in that, The top of the screening barrel (2) is fixedly connected to the feeding channel (14), and the top of the fixed frame (1) is provided with a placement box (15), which is placed directly below the screening barrel (2).

6. A screening device for producing steel shot according to claim 1, characterized in that, Two protective plates (16) are symmetrically fixed at both ends of the screening barrel (2), and the protective plates (16) are inclined.

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