Smelting raw material particle size screening device

Abstract

The utility model provides a kind of smelting raw material particle size screening device, including the screen cylinder body being obliquely arranged in protective casing and the power drive assembly of driving screen cylinder body rotation, and the outer periphery of the inlet and outlet end of screen cylinder body is respectively fixed with circular-truncated-cone support ring, and protective casing front and rear sides are equipped with idler assembly and support ring cooperation support screen cylinder body rotation, reduce tire stress and improve screen cylinder body stability.Screen cylinder body is connected by several screen cylinder segments in turn, screen hole aperture increases gradually, and bottom is equipped with discharge hopper to realize material distribution.The anti-blocking vibration knocking mechanism is arranged on the protective casing, the screen cylinder segment is periodically knocked by rubber hammer head, and the screen hole is effectively prevented from blocking.The maintenance platform is provided with feeding hopper, discharge hopper and protective fence, and the operation is safe and convenient.Through the above structural design, the device can realize efficient, continuous and accurate classification screening of smelting raw materials, prolong the service life of power components, and reduce maintenance cost.

Description

Technical Field

[0001] This application relates to the field of raw material screening technology, specifically to a particle size screening device for smelting raw materials. Background Technology

[0002] Shaftless drum screens, a common type of grading and screening equipment, are widely used in industries such as metallurgy, building materials, and casting. The basic structure of this type of equipment involves supporting the screen cylinder at a certain angle on rollers, and driving the cylinder to rotate via a drive mechanism, thereby achieving the rolling, scattering, and screening of materials within the cylinder. Because it eliminates the need for a hollow main shaft running through the cylinder, shaftless drum screens can handle larger or easily entangled materials, and have certain application potential in the grading process of silicon-based multi-element alloys and silicon-based multi-element composite materials used in casting.

[0003] However, existing shaftless drum screens still have technical shortcomings when processing high-density, high-hardness, and sharply shaped silicon-based alloy materials. Specifically, the axial force of the drum is usually borne by lateral guide wheels or simple thrust rollers. Under heavy load and impact conditions, their axial restraint is insufficient, which can easily cause the drum to move erratically and generate frictional heat, thereby further aggravating the problems of drum deviation and instability. Summary of the Invention

[0004] The present invention aims to provide a particle size screening device for smelting raw materials, which solves the technical problem of insufficient axial constraint force of existing shaftless drum screens.

[0005] To address the aforementioned issues, this application provides a particle size screening device for smelting raw materials, comprising a screen cylinder, a protective housing, and a power drive assembly. The screen cylinder is inclinedly disposed within the protective housing, and the power drive assembly is used to drive the screen cylinder to rotate. The device is characterized in that: a support ring is fixed to the outer periphery of the feed end and discharge end of the screen cylinder, with the feed end of the screen cylinder considered forward and the discharge end considered backward. The support ring is frustum-shaped, and the outer diameter of its front end is larger than its outer diameter of its rear end. Two sets of roller assemblies are fixedly installed on both the front and rear sides of the protective housing. The two sets of roller assemblies are used to rotate and support the support rings at the front and rear ends of the screen cylinder. Each set of roller assemblies includes an arc-shaped roller frame with several rollers on it. All rollers are symmetrically arranged on the roller frame and are mounted on it by rotation. The rollers are frustum-shaped and the diameter of the front end is smaller than that of the rear end. The rollers are in contact with the corresponding support rings.

[0006] Furthermore, the smelting raw material particle size screening device also includes a maintenance platform, the protective housing is installed on the maintenance platform, the maintenance platform is provided with a protective railing around its outer perimeter, and several support legs are installed at the bottom of the maintenance platform.

[0007] Furthermore, the maintenance platform is equipped with a feed hopper and a waste discharge pipe. The feed hopper is connected to the feed end of the screen cylinder, and the waste discharge pipe is connected to the discharge end of the screen cylinder.

[0008] Furthermore, the screen cylinder body is composed of several screen cylinder sections connected in sequence, each screen cylinder section is evenly distributed with screen holes, and the screen hole diameter of the screen cylinder section located on the rear side is larger than the screen hole diameter of the screen cylinder section located on the front side. The bottom of the protective housing is provided with multiple sets of feeding hoppers, each of which is connected to a corresponding screen cylinder section.

[0009] Furthermore, the protective housing is also equipped with an anti-vibration and knocking mechanism.

[0010] Furthermore, the anti-blocking vibration mechanism includes a vibration motor and a rotating shaft. The rotating shaft is installed inside the protective housing through several sets of bearings and bearing seats, and the rotating shaft is located above the screen cylinder. The main shaft of the vibration motor is connected to one end of the rotating shaft through a coupling. Several sets of vibration components are provided on the rotating shaft, and the vibration components are provided one-to-one with each screen cylinder section.

[0011] Furthermore, each set of vibration components includes a fixed sleeve, which is fitted onto the rotating shaft and fixed by several bolts. At least one rubber belt is connected to the outer periphery of the fixed sleeve, and a rubber hammer is connected to the end of the rubber belt; the rubber hammer can contact the corresponding screen cylinder section.

[0012] Furthermore, the rubber hammer head is spherical or cylindrical.

[0013] Compared with the prior art, the technical advantages of this application are as follows: This invention solves the problems of cylinder movement, deviation, and frictional heating in existing shaftless drum screens when processing high-density, high-hardness, and sharp-particle raw materials. The combination of the rollers and support rings provides stable constraint and effectively enhances the axial and radial support force of the screen cylinder. Simultaneously, the cooperation between the rollers and support rings can share some of the stress on the tire-belt drive structure, reducing the risk of uneven tire wear and premature damage, extending the service life of the power drive components, and improving the operational stability of the equipment.

[0014] Furthermore, the screen cylinder is composed of multiple screen sections connected sequentially, with the screen aperture diameter decreasing progressively in each section. A corresponding feed hopper is located at the bottom, enabling efficient grading and screening of materials of different particle sizes. An anti-clogging vibration-damping mechanism is installed on the protective casing, with rubber hammers periodically striking the screen cylinder sections to effectively prevent screen clogging and ensure a continuous and stable screening process. The inclusion of a maintenance platform and guardrails enhances the safety and convenience of operation and maintenance. Through these designs, this device significantly improves screening efficiency and reliability, meeting the practical application requirements for particle size screening of smelting raw materials. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the particle size screening device for smelting raw materials; Figure 2 This is a schematic diagram of the smelting raw material particle size screening device after the maintenance platform has been removed. Figure 3 A schematic diagram showing the fit between the support ring and the support roller assembly; Figure 4 This is a schematic diagram of the internal structure of the protective casing; Figure 5 This is a schematic diagram of the vibration and knocking assembly.

[0016] Explanation of reference numerals in the attached figures: 1. Screen cylinder body; 2. Protective housing; 3. Power drive assembly; 4. Motor; 5. Reducer; 6. Long shaft; 7. Roller belt; 8. Tire; 9. Support ring; 10. Roller assembly; 11. Roller frame; 12. Roller; 13. Maintenance platform; 14. Guardrail; 15. Outriggers; 16. Feed hopper; 17. Waste discharge pipe; 18. Screen cylinder section; 19. Screen holes; 20. Discharge hopper; 22. Rotating shaft; 24. Bearing seat; 26. Vibration assembly; 27. Fixing sleeve; 28. Rubber belt; 29. ​​Rubber hammer; 30. Vibration motor. Detailed Implementation

[0017] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0018] Specific Embodiment 1 of the smelting raw material particle size screening device provided by this utility model: like Figure 1 and Figure 2 As shown, the smelting raw material particle size screening device includes a screen cylinder 1, a protective housing 2, and a power drive assembly 3. The screen cylinder 1 is inclinedly arranged inside the protective housing 2. The power drive assembly 3 is used to drive the screen cylinder 1 to rotate. The screen cylinder 1, the protective housing 2, and the power drive assembly 3 are all the main components of existing shaftless drum screens. The power drive assembly 3 includes a motor 4, a reducer 5, and two long shafts 6. The two long shafts 6 are symmetrically arranged on the left and right sides of the screen cylinder 1. Roller belts 7 are provided at both ends of the screen cylinder 1. Tires 8 are installed at both ends of the long shafts 6. The tires 8 are in contact with the roller belts 7 of the screen cylinder 1. The motor 4 drives the reducer 5, and the reducer 5 drives one of the long shafts 6 to rotate. The screen cylinder 1 can be driven to rotate by the friction between the tires 8 and the roller belts 7. All of the above structures are existing technologies.

[0019] Based on this, the support method of the screen cylinder 1 is improved in this embodiment. Support rings 9 are fixed on the outer periphery of the feed end and the discharge end of the screen cylinder 1, respectively. With the feed end of the screen cylinder 1 as the front and the discharge end as the rear, the support ring 9 is truncated cone in shape, and the outer diameter of the front end of the support ring 9 is larger than the outer diameter of its rear end.

[0020] Two sets of roller assemblies 10 are fixedly installed on both the front and rear sides of the protective housing 2. The two sets of roller assemblies 10 are used to rotate and support the support rings 9 at the front and rear ends of the screen cylinder 1, respectively. Each set of roller assemblies 10 includes an arc-shaped roller steel frame 11 (e.g., Figure 3 As shown, the support steel frame 11 is provided with several support rollers 12. All the support rollers 12 are symmetrically arranged on the support steel frame 11 from left to right, and the support rollers 12 are mounted on the support steel frame 11 by rotation. The support rollers 12 are also frustum-shaped, and their front end diameter is smaller than their rear end diameter. The support rollers 12 are in contact with the corresponding support rings 9, so as to form a stable limiting constraint on the screen cylinder 1 during rotation, so as to prevent the screen cylinder 1 from moving and deviating under heavy load and impact conditions, and improve the reliability and safety of operation.

[0021] In addition, through the limiting cooperation between the support roller 12 and the support ring 9, some of the axial and radial forces originally borne by the tire 8-roller 7 structure can be shared, thereby effectively reducing the stress and friction burden on the tire 8, reducing the risk of uneven wear and premature damage to the tire 8, extending the service life of the power drive components, and improving the overall operational stability of the machine.

[0022] In addition, the smelting raw material particle size screening device in this embodiment also includes a maintenance platform 13. The protective housing 2 is installed on the maintenance platform 13. The outer perimeter of the maintenance platform 13 is provided with a protective railing 14. Several support legs 15 are installed at the bottom of the maintenance platform 13 for overall support and stable installation.

[0023] The maintenance platform 13 is equipped with a feed hopper 16 and a waste discharge pipe 17. The feed hopper 16 is connected to the feed end of the screen cylinder 1, and the waste discharge pipe 17 is connected to the discharge end of the screen cylinder 1. This enables convenient feeding of raw materials and smooth discharge of waste, while providing a safe and reliable maintenance environment for operators.

[0024] Specific Embodiment 2 of the smelting raw material particle size screening device provided by this utility model: Based on Example 1, such as Figure 4 As shown, the screen cylinder 1 is composed of five screen cylinder sections 18 connected in sequence. Each screen cylinder section 18 has screen holes 19 evenly distributed on it. The screen hole diameter 19 of the screen cylinder section 18 located on the rear side is larger than the screen hole diameter 19 of the screen cylinder section 18 located on the front side, so as to realize step-by-step screening.

[0025] The bottom of the protective housing 2 is provided with five sets of feeding hoppers 20, which are respectively connected to the corresponding screen cylinder section 18 to receive and discharge undersize materials of different particle sizes, thereby realizing efficient grading and precise screening of raw materials and avoiding interference of large particles with the subsequent screening accuracy.

[0026] Specific embodiment 3 of the smelting raw material particle size screening device provided by this utility model: Based on Example 2, such as Figure 4 and Figure 5 As shown, the protective housing 2 is also equipped with an anti-blocking vibration mechanism. The anti-blocking vibration mechanism includes a vibration motor 30 and a rotating shaft 22. The rotating shaft 22 is installed inside the protective housing 2 through several sets of bearings and bearing seats 24, and the rotating shaft 22 is located above the screen cylinder 1. The main shaft of the vibration motor 30 is connected to one end of the rotating shaft 22 through a coupling. Several sets of vibration components 26 are provided on the rotating shaft 22, and the vibration components 26 are arranged one-to-one with each screen cylinder section 18.

[0027] Each set of vibration components 26 includes a fixing sleeve 27, which is fitted onto the rotating shaft 22 and fixed by several bolts. Three rubber bands 28 are connected to the outer periphery of the fixing sleeve 27, and a rubber hammer 29 is connected to the end of each rubber band 28. The rubber hammer 29 can contact the corresponding screen cylinder section 18.

[0028] During the screening operation, the vibrating motor 30 drives the rotating shaft 22 to rotate. As the shaft 22 rotates, the rubber hammer 29 contacts and strikes the corresponding screen cylinder section 18, promptly clearing any blockages in the screen holes 19 during screening. This prevents clogging caused by irregular or sharp material particles, ensuring the continuity and stability of the screening process. Preferably, the rubber hammer 29 can be spherical or cylindrical to balance striking force with protection of the screen cylinder 1.

[0029] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application 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 application.

Claims

1. A particle size screening device for smelting raw materials, comprising a screen cylinder (1), a protective housing (2), and a power drive assembly (3), wherein the screen cylinder (1) is inclinedly disposed within the protective housing (2), and the power drive assembly (3) is used to drive the screen cylinder (1) to rotate, characterized in that: The feed end and discharge end of the screen cylinder (1) are respectively fixed with support rings (9). With the feed end of the screen cylinder (1) as the front and the discharge end as the rear, the support ring (9) is truncated cone in shape, and the outer diameter of the front end of the support ring (9) is larger than the outer diameter of its rear end. Two sets of roller assemblies (10) are fixedly installed on the front and rear sides of the protective housing (2). The two sets of roller assemblies (10) are used to rotate and support the support rings (9) at the front and rear ends of the screen cylinder (1). Each set of roller assemblies (10) includes an arc-shaped roller frame (11). Several rollers (12) are provided on the roller frame (11). All rollers (12) are symmetrically arranged on the roller frame (11) from left to right. The rollers (12) are installed on the roller frame (11) by rotation. The rollers (12) are truncated cone-shaped. The diameter of the front end of the roller (12) is smaller than the diameter of the rear end. The rollers (12) are in contact with the corresponding support rings (9).

2. The particle size screening device for smelting raw materials according to claim 1, characterized in that: It also includes a maintenance platform (13), the protective housing (2) is installed on the maintenance platform (13), the outer perimeter of the maintenance platform (13) is provided with a protective railing (14), and the bottom of the maintenance platform (13) is equipped with several support legs (15).

3. The smelting raw material particle size screening device according to claim 2, characterized in that: The maintenance platform (13) is equipped with a feed hopper (16) and a waste discharge pipe (17). The feed hopper (16) is connected to the feed end of the screen cylinder (1), and the waste discharge pipe (17) is connected to the discharge end of the screen cylinder (1).

4. The particle size screening device for smelting raw materials according to claim 3, characterized in that: The sieve cylinder body (1) is composed of several sieve cylinder sections (18) connected in sequence. Each sieve cylinder section (18) has sieve holes (19) evenly distributed on it, and the sieve hole (19) diameter of the sieve cylinder section (18) located on the rear side is larger than the sieve hole (19) diameter of the sieve cylinder section (18) located on the front side. The bottom of the protective housing (2) is provided with multiple sets of feeding hoppers (20), and the feeding hoppers (20) are respectively connected to the corresponding screen cylinder sections (18).

5. The particle size screening device for smelting raw materials according to claim 4, characterized in that: The protective housing (2) is also equipped with an anti-vibration and knocking mechanism.

6. The particle size screening device for smelting raw materials according to claim 5, characterized in that: The anti-blocking vibration mechanism includes a vibration motor (30) and a rotating shaft (22). The rotating shaft (22) is installed in the protective housing (2) through several sets of bearings and bearing seats (24), and the rotating shaft (22) is located above the screen cylinder (1). The main shaft of the vibration motor (30) is connected to one end of the rotating shaft (22) through a coupling. Several sets of vibration components (26) are provided on the rotating shaft (22), and the vibration components (26) are provided one-to-one with each screen cylinder section (18).

7. The particle size screening device for smelting raw materials according to claim 6, characterized in that: Each set of vibration components (26) includes a fixed sleeve (27), which is fitted onto the rotating shaft (22) and fixed by several bolts. At least one rubber belt (28) is connected to the outer periphery of the fixed sleeve (27), and a rubber hammer (29) is connected to the end of the rubber belt (28). The rubber hammer (29) can contact the corresponding screen cylinder section (18).

8. The particle size screening device for smelting raw materials according to claim 7, characterized in that: The rubber hammer head (29) is spherical or cylindrical.

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