A screening tool for coated sand regeneration treatment

Abstract

This utility model discloses a screening fixture for the regeneration of coated sand, belonging to the field of screening fixture technology. It includes a coated sand screening box, inside which are installed two linear screens. A uniform magnetic screening structure is located on the coated sand screening box. The uniform magnetic screening structure includes a drive motor, two conveying rollers, a conveyor belt, a limiting plate, a collection box, two gears, a magnetic suction cylinder, a rotating shaft, and a scraper. The two conveying rollers are rotatably connected inside the coated sand screening box. Through the cooperation of the limiting plate and the return plate, the sand is evenly distributed on the conveyor belt, avoiding "material concentration." Simultaneously, the drive motor drives the magnetic suction cylinder to rotate synchronously with the conveyor belt through gear transmission. The magnetic suction cylinder can perform comprehensive magnetic separation of the evenly conveyed sand, thereby reducing blind spots in magnetic separation. The scraper promptly scrapes the sand into the collection box, preventing metal particles from being adsorbed on the surface of the magnetic suction cylinder for a long time and being washed away by the high-speed sand flow, further improving the quality of magnetic separation.

Description

Technical Field

[0001] This utility model relates to the field of screening tooling technology, and in particular to a screening tooling for coated sand regeneration treatment. Background Technology

[0002] Coated sand, as an important molding material widely used in the foundry industry, directly affects the quality of castings and production efficiency. With the continuous development of the foundry industry, the consumption of coated sand is increasing day by day, and a large amount of waste coated sand is generated. Therefore, the recycling technology of coated sand has emerged. Through recycling, waste coated sand can be made to meet the standards for reuse again, realizing the recycling of resources, reducing production costs and reducing environmental pollution, and has significant economic and environmental benefits.

[0003] In existing screening equipment, screening and magnetic separation are usually two relatively independent processes, lacking an effective collaborative working mechanism. During the screening process, the coated sand is in a flowing state. If the magnetic separation device cannot be closely coordinated with the screening process, it cannot fully utilize the fluidity of the coated sand to improve the magnetic separation efficiency. Furthermore, since the magnetic separation device is fixed at a certain position in the screening equipment, when the coated sand passes through that position, only some sand particles can fully contact the magnetic separation device, resulting in a large number of ferromagnetic impurities not being adsorbed and continuing to remain in the coated sand, thus affecting the quality of the recycled coated sand. Utility Model Content

[0004] The purpose of this invention is to at least solve one of the technical problems existing in the prior art, and to provide a screening tool for the regeneration of coated sand. This tool addresses the issue that in existing screening tools, screening and magnetic separation are usually two relatively independent steps, lacking an effective collaborative working mechanism. During the screening process, the coated sand is in a flowing state, and if the magnetic separation device cannot be closely coordinated with the screening process, the fluidity of the coated sand cannot be fully utilized to improve the magnetic separation efficiency. Furthermore, since the magnetic separation device is fixed at a certain position in the screening equipment, when the coated sand passes through that position, only some sand particles can fully contact the magnetic separation device, resulting in a large number of ferromagnetic impurities not being adsorbed and remaining in the coated sand, thus affecting the quality of the regenerated coated sand.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a screening tool for coated sand regeneration treatment, comprising: The coated sand screening box contains two linear screens. Uniform magnetic sieve structure, located on the film-coated sand screening box; The uniform magnetic sieve structure includes a drive motor, two conveyor rollers, a conveyor belt, a limiting plate, and a collection box. The two conveyor rollers are rotatably connected inside the film-coated sand screening box, and both ends of the two conveyor rollers extend rotatably to the outside of the film-coated sand screening box. The drive motor is fixedly installed on one side of the film-coated sand screening box, and the output end of the drive motor is fixedly connected to the corresponding conveyor roller. The conveyor belt is sleeved on the outer surface of the two conveyor rollers. The limiting plate is fixedly connected inside the film-coated sand screening box and is located above the conveyor belt. An installation groove is opened on one side of the film-coated sand screening box, and the collection box is slidably installed inside the installation groove. The uniform magnetic separation structure also includes two gears, a magnetic suction cylinder, a rotating shaft, and a scraper. The rotating shaft is rotatably connected inside the coated sand screening box, and both ends of the rotating shaft extend to the outside of the coated sand screening box. The magnetic suction cylinder is fixedly sleeved on the outer surface of the rotating shaft and is located below the discharge end of the conveyor belt. The two gears are fixedly sleeved on the outer surfaces of the rotating shaft and the corresponding conveyor rollers, respectively. Both gears are located outside the coated sand screening box and are meshed. The scraper is fixedly connected to the inner bottom wall of the collection box, and the top of the scraper contacts the outer surface of the magnetic suction cylinder.

[0006] Preferably, a return plate is fixedly connected to the top of the limiting plate.

[0007] Preferably, the conveyor belt is located between two linear screens, with the feed end of the conveyor belt located below the discharge end of the linear screen above it, and the discharge end of the conveyor belt located above the feed end of the linear screen below it.

[0008] Preferably, the coated sand screening box has two discharge ports on one side, and the discharge ends of the two linear screens are fixedly connected to guide plates, with the two guide plates located inside the corresponding discharge ports.

[0009] Preferably, the coated sand screening box has a discharge port on one side with an inclined inner bottom wall.

[0010] Preferably, the control panel is installed on the side of the coated sand screening box away from the two discharge ports.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows: The screening tool for the coating sand regeneration process, through the cooperation of the limiting plate and the return plate, makes the sand evenly distributed on the conveyor belt, avoiding "material flow concentration". At the same time, the drive motor drives the magnetic suction cylinder to rotate synchronously with the conveyor belt through gear transmission. The magnetic suction cylinder can perform full-coverage magnetic separation on the evenly conveyed sand, thereby reducing the magnetic separation blind zone. The scraper promptly scrapes the sand into the collection box, preventing metal particles from being adsorbed on the surface of the magnetic suction cylinder for a long time and being washed away by the high-speed sand flow, further improving the quality of magnetic separation. Attached Figure Description

[0012] The present invention will be further described below with reference to the accompanying drawings and embodiments: Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram of the guide plate structure of this utility model; Figure 3 This is a schematic diagram of the cross-sectional structure of the film-coated sand screening box of this utility model; Figure 4 This is a schematic cross-sectional view of the collection box structure of this utility model; Figure 5 This is a schematic diagram of the internal structure of the linear screen of this utility model.

[0013] Reference numerals: 1. Coated sand screening box; 2. Control panel; 3. Drive motor; 4. Mounting chute; 5. Discharge port; 6. Gear; 7. Discharge outlet; 8. Guide plate; 9. Linear screen; 10. Conveyor belt; 11. Conveyor roller; 12. Magnetic suction cylinder; 13. Rotating shaft; 14. Scraper; 15. Collection box; 16. Return plate; 17. Limiting plate. Detailed Implementation

[0014] This section will describe in detail the specific embodiments of this utility model. Preferred embodiments of this utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, enabling a person to intuitively and vividly understand each technical feature and overall technical solution of this utility model. However, they should not be construed as limiting the scope of protection of this utility model. In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this utility model.

[0015] In the description of this utility model, terms such as greater than, less than, and exceeding are understood to exclude the stated number, while terms such as above, below, and within are understood to include the stated number. The use of "first" and "second" in the description is for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, the quantity of indicated technical features, or the order of the indicated technical features. In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installing," and "connecting" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of these terms in this utility model based on the specific content of the technical solution.

[0016] Please see Figure 1-5 This utility model provides a technical solution: a screening tool for coated sand regeneration treatment, comprising: The coated sand screening box 1 has two linear screens 9 installed inside it; Uniform magnetic sieve structure, located on the membrane sand screening box 1; The uniform magnetic sieve structure includes a drive motor 3, two conveyor rollers 11, a conveyor belt 10, a limiting plate 17, and a collection box 15. The two conveyor rollers 11 are rotatably connected inside the film-coated sand screening box 1, and both ends of the two conveyor rollers 11 extend rotatably to the outside of the film-coated sand screening box 1. The drive motor 3 is fixedly installed on one side of the film-coated sand screening box 1, and the output end of the drive motor 3 is fixedly connected to the corresponding conveyor roller 11. The conveyor belt 10 is driven and sleeved on the outer surface of the two conveyor rollers 11. The limiting plate 17 is fixedly connected inside the film-coated sand screening box 1 and is located above the conveyor belt 10. An installation groove 4 is opened on one side of the film-coated sand screening box 1, and the collection box 15 is slidably installed inside the installation groove 4.

[0017] The uniform magnetic separation structure also includes two gears 6, a magnetic suction cylinder 12, a rotating shaft 13, and a scraper 14. The rotating shaft 13 is rotatably connected inside the coated sand screening box 1, and both ends of the rotating shaft 13 extend rotatably to the outside of the coated sand screening box 1. The magnetic suction cylinder 12 is fixedly sleeved on the outer surface of the rotating shaft 13 and is located below the discharge end of the conveyor belt 10. The two gears 6 are respectively fixedly sleeved on the outer surfaces of the rotating shaft 13 and the corresponding conveying rollers 11. Both gears 6 are located outside the coated sand screening box 1 and are meshed. The scraper 14 is fixedly connected to the inner bottom wall of the collection box 15, and the top of the scraper 14 is in contact with the outer surface of the magnetic suction cylinder 12.

[0018] A return plate 16 is fixedly connected to the top of the limiting plate 17. The conveyor belt 10 is located between the two linear screens 9. The feed end of the conveyor belt 10 is located below the discharge end of the linear screen 9 above it, and the discharge end of the conveyor belt 10 is located above the feed end of the linear screen 9 below it. Two discharge ports 7 are opened on one side of the film-coated sand screening box 1. The discharge ends of the two linear screens 9 are fixedly connected to guide plates 8. The two guide plates 8 are located inside the corresponding discharge ports 7. A discharge port 5 with an inclined inner bottom wall is opened on one side of the film-coated sand screening box 1. A control panel 2 is installed on the side of the film-coated sand screening box 1 away from the two discharge ports 7.

[0019] Furthermore, when using the device, the staff put the recycled coated sand to be processed into the feed end of the coated sand screening box 1. The sand first falls into the upper linear screen 9. After the upper linear screen 9 is started, it performs initial classification of the sand, screening out the sand with the required particle size. Impurities with excessive particle size remain on the surface of the upper linear screen 9 and finally enter the corresponding guide plate 8 along the discharge end of the upper linear screen 9, and are discharged through the corresponding discharge port 7 on one side of the coated sand screening box 1, completing the initial impurity separation. After initial screening, the sand falls onto the conveyor belt 10 located between the two linear screens 9. At this time, the drive motor 3 is started, and the drive motor 3 drives the conveyor roller 11 fixedly connected to it to rotate. Since the conveyor belt 10 is driven by the outer surface of the two conveyor rollers 11, the conveyor rollers 11 rotate and drive the conveyor belt 10 to run at a uniform speed, so as to achieve stable conveying of the sand. During the process of conveying sand on the conveyor belt 10, the limiting plate 17 located above the conveyor belt 10 blocks the sand, preventing the sand from accumulating and forming a "material flow concentration area", so that the sand is evenly distributed along the width direction of the conveyor belt 10. At the same time, the return plate 16 on one side of the limiting plate 17 can guide the excessively accumulated sand back to the conveyor belt 10, further ensuring the uniformity of sand conveying and laying the foundation for subsequent uniform magnetic separation. The gear 6, which is fixedly sleeved with the conveyor roller 11, rotates with the conveyor roller 11. Since the gear 6 meshes with the gear 6 on the outer surface of the rotating shaft 13, the gear 6 drives the rotating shaft 13 to rotate synchronously. The magnetic suction cylinder 12, which is fixedly sleeved on the outer surface of the rotating shaft 13, rotates with the rotating shaft 13. When the sand material evenly distributed on the conveyor belt 10 is conveyed to the area below the magnetic suction cylinder 12, the magnetic field of the magnetic suction cylinder 12 adsorbs the metal impurities in the sand material, thereby separating the metal impurities from the sand material. Metal impurities adsorbed on the outer surface of the magnetic suction cylinder 12 rotate to the scraper plate 14. Since the scraper plate 14 is fixedly connected to the bottom wall of the collection box 15 and its top is in contact with the outer surface of the magnetic suction cylinder 12, the scraper plate 14 scrapes the metal impurities off the surface of the magnetic suction cylinder 12. The impurities fall into the collection box 15. The collection box 15 is slidably installed in the installation groove 4 on one side of the film-coated sand screening box 1. The staff can periodically remove the collection box 15 to clean the impurities. After magnetic separation, the sand falls from the conveyor belt 10 into the linear screen 9 below for secondary screening to further remove fine impurities. The sand that meets the requirements falls into the inner bottom wall of the film-coated sand screening box 1 after passing through the linear screen 9 below. It slides along the inclined surface to the discharge port 5 on one side of the film-coated sand screening box 1 and is discharged, completing the purification treatment of the recycled sand. The small amount of impurities generated by the secondary screening enters the corresponding guide plate 8 along the discharge end of the linear screen 9 below and is discharged through another discharge port 7.

[0020] By cooperating with the limiting plate 17 and the return plate 16, the sand is evenly distributed on the conveyor belt 10, avoiding "material concentration". At the same time, the drive motor 3 drives the magnetic suction cylinder 12 to rotate synchronously with the conveyor belt 10 through the gear 6. The magnetic suction cylinder 12 can perform full-coverage magnetic separation on the evenly conveyed sand, thereby reducing the magnetic separation blind zone. The scraper plate 14 scrapes the sand into the collection box 15 in time, preventing metal particles from being adsorbed on the surface of the magnetic suction cylinder 12 for a long time and being washed off by the high-speed sand flow, further improving the quality of magnetic separation.

[0021] Structural Description: Coated Sand Screening Box 1: As the core load-bearing and protective shell for the purification and treatment of recycled coated sand, it provides installation support space for all internal structures such as linear screen 9, conveyor belt 10, and magnetic suction cylinder 12; Control panel 2: Installed on the side of the film-coated sand screening box 1 away from the two discharge ports 7, it is used to individually or in conjunction with all electrically driven structures such as drive motor 3 and linear screen 9. It can realize operations such as equipment start-up, stop, and adjustment of operating parameters, and is the control core of equipment operation. Installation chute 4: It is opened on one side of the film-coated sand screening box 1, and the collection box 15 is slidably installed inside it. It provides a stable installation and sliding guide for the collection box 15, making it easy for the staff to regularly pull out the collection box 15 to clean the internal metal impurities. At the same time, it ensures the positional stability of the collection box 15 during equipment operation and ensures that the scraper 14 can continuously contact the outer surface of the magnetic suction cylinder 12. Discharge port 5: Located on one side of the film-coated sand screening box 1, at the lower end of the inclined surface of the bottom wall inside the box, it is used to discharge the recycled sand that meets the requirements after secondary screening. It is the final output channel of the purified sand, ensuring that the sand can smoothly leave the equipment after processing. Gear 6: There are two gears, which are fixedly sleeved on the outer surface of the rotating shaft 13 and the corresponding conveying roller 11, respectively. They are both located outside the film-coated sand screening box 1 and are meshed. Their function is to transmit the rotational power of the conveying roller 11 to the rotating shaft 13, so that the rotating shaft 13 can rotate synchronously with the conveying roller 11, thereby driving the magnetic suction cylinder 12 to rotate, so as to realize the coordinated and synchronous operation of the conveyor belt 10 conveying sand and the magnetic separation action of the magnetic suction cylinder 12. Discharge port 7: There are two in total, both located on one side of the film-coated sand screening box 1. Each discharge port 7 has a corresponding guide plate 8 inside. One of them is used to discharge the large-sized impurities left on the screen surface after the initial classification of the linear screen 9, and the other is used to discharge the small amount of fine impurities generated after the secondary screening. It is the discharge channel for various impurities separated by the equipment, and avoids the accumulation of impurities in the box. Guide plates 8: There are two in total, which are fixedly connected to the discharge ends of the two linear screens 9 respectively, and are located inside the corresponding discharge ports 7. Their function is to guide the impurities discharged from the discharge ends of the linear screens 9, so that the impurities can be accurately discharged from the film-coated sand screening box 1 through the discharge ports 7, preventing the impurities from scattering inside the box and ensuring the smooth discharge path of the impurities. Linear screen 9: There are two in total, both installed inside the film-coated sand screening box 1. One is located above the conveyor belt 10 and the other is located below the conveyor belt 10. This is existing equipment. For specific reference, please refer to the model: SZF series linear vibrating screen model SZF-520. Conveyor belt 10: The transmission sleeve is connected to the outer surface of the two conveyor rollers 11 and is located between the two linear screens 9. It runs at a constant speed under the drive of the conveyor rollers 11. It is used to receive the sand material under the upper linear screen 9 and to stably transport the sand material to the bottom of the magnetic suction cylinder 12 for magnetic separation. At the same time, under the action of the limiting plate 17 and the return plate 16, it ensures that the sand material is evenly distributed along the width direction, laying the foundation for subsequent uniform magnetic separation. It is the core carrier for the transmission of sand material inside the equipment. Conveyor rollers 11: There are two in total, both rotatably connected inside the film-coated sand screening box 1, with both ends extending rotatably to the outside of the box. One of them is fixedly connected to the output end of the drive motor 3, and the other is connected to the conveyor roller 11 through the conveyor belt 10. Its function is to rotate under the drive motor 3, providing support and transmission for the uniform operation of the conveyor belt 10. At the same time, it drives the rotating shaft 13 to rotate through the gear 6 fixed on the outer surface. It is a key transmission structure connecting the power source, the conveyor belt 10, and the rotating shaft 13. Magnetic suction cylinder 12: It is fixedly sleeved on the outer surface of the rotating shaft 13 and located above the conveyor belt 10. It rotates synchronously with the rotating shaft 13. When the sand material evenly distributed on the conveyor belt 10 is transported to its lower part, it uses its own magnetic field to adsorb metal impurities in the sand material, thereby separating the metal impurities from the sand material. It is the core execution structure of the equipment's magnetic separation function. Rotating shaft 13: Rotatably connected inside the film-coated sand screening box 1, with both ends extending to the outside of the box. A magnetic suction cylinder 12 and a gear 6 are fixedly sleeved on the outer surface. Under the transmission action of the gear 6, it rotates synchronously with the conveying roller 11, thereby driving the magnetic suction cylinder 12 to rotate, providing rotational support for the magnetic separation action of the magnetic suction cylinder 12, and is the key transmission component connecting the gear 6 and the magnetic suction cylinder 12. Scraper 14: Fixedly connected to the inner bottom wall of the collection box 15, with its top in close contact with the outer surface of the magnetic cylinder 12. When the magnetic cylinder 12 adsorbs metal impurities and rotates to its position, it can scrape the metal impurities off the surface of the magnetic cylinder 12, causing the impurities to fall into the collection box 15, thereby realizing the detachment and collection of metal impurities from the magnetic cylinder 12 and ensuring the continuous magnetic separation capability of the magnetic cylinder 12. Collection box 15: It is slidably installed inside the installation groove 4, and the scraper 14 is fixedly connected to the inner bottom wall. It is used to receive metal impurities scraped off from the magnetic suction cylinder 12 by the scraper 14. The staff can periodically pull it out for cleaning. It is a temporary storage structure for metal impurities to prevent metal impurities from contaminating the treated sand or falling into the equipment. Return plate 16: It is fixedly connected to the top (one side) of the limiting plate 17 and located above the conveyor belt 10. Its function is to guide the excessive sand material blocked by the limiting plate 17 back to the conveyor belt 10, further optimize the uniformity of sand material distribution on the conveyor belt 10, prevent sand material from affecting the subsequent magnetic separation effect due to local accumulation, and assist the limiting plate 17 in achieving uniform sand material transportation. Material limiting plate 17: It is fixedly connected inside the film-coated sand screening box 1 and located above the conveyor belt 10. During the process of conveying sand by the conveyor belt 10, it forms a barrier to prevent the sand from accumulating and forming a "material flow concentration area". It forces the sand to be evenly distributed along the width of the conveyor belt 10, laying the foundation for the subsequent uniform magnetic separation of the sand by the magnetic suction cylinder 12. It is the core barrier and diversion structure to ensure uniform conveying of sand.

[0022] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A screening fixture for coated sand regeneration, characterized in that, include: The film-coated sand screening box (1) has two linear screens (9) installed inside. A uniform magnetic sieve structure is located on the film-coated sand screening box (1); The uniform magnetic sieve structure includes a drive motor (3), two conveyor rollers (11), a conveyor belt (10), a limiting plate (17), and a collection box (15). The two conveyor rollers (11) are rotatably connected inside the film-coated sand screening box (1). Both ends of the two conveyor rollers (11) rotatably extend to the outside of the film-coated sand screening box (1). The drive motor (3) is fixedly installed on one side of the film-coated sand screening box (1). The output end of the drive motor (3) is fixedly connected to the corresponding conveyor roller (11). Among them, the conveyor belt (10) is driven and sleeved on the outer surface of the two conveyor rollers (11), the limiting plate (17) is fixedly connected to the inside of the film-coated sand screening box (1), the limiting plate (17) is located above the conveyor belt (10), the film-coated sand screening box (1) is provided with an installation groove (4) on one side, and the collection box (15) is slidably installed inside the installation groove (4); The uniform magnetic separation structure also includes two gears (6), a magnetic suction cylinder (12), a rotating shaft (13) and a scraper (14). The rotating shaft (13) is rotatably connected to the inside of the film-coated sand screening box (1). Both ends of the rotating shaft (13) extend to the outside of the film-coated sand screening box (1). The magnetic suction cylinder (12) is fixedly sleeved on the outer surface of the rotating shaft (13). The magnetic suction cylinder (12) is located below the discharge end of the conveyor belt (10). Two gears (6) are fixedly sleeved on the outer surfaces of the rotating shaft (13) and the corresponding conveying roller (11), respectively. Both gears (6) are located outside the film-coated sand screening box (1) and meshed. The scraper (14) is fixedly connected to the inner bottom wall of the collection box (15), and the top of the scraper (14) is in contact with the outer surface of the magnetic suction cylinder (12).

2. The screening tool for coated sand regeneration according to claim 1, characterized in that: The top of the limiting plate (17) is fixedly connected to the return plate (16).

3. The screening device for coated sand regeneration according to claim 1 or 2, characterized in that: The conveyor belt (10) is located between two linear screens (9), with the feed end of the conveyor belt (10) below the discharge end of the linear screen (9) above it and the discharge end of the conveyor belt (10) above the feed end of the linear screen (9) below it.

4. The screening tool for coated sand regeneration according to claim 1, characterized in that: The coated sand screening box (1) has two discharge ports (7) on one side. The discharge ends of the two linear screens (9) are fixedly connected to guide plates (8), and the two guide plates (8) are located inside the corresponding discharge ports (7).

5. The screening fixture for coated sand regeneration according to claim 1, characterized in that: The coated sand screening box (1) has a discharge port (5) with an inclined inner bottom wall on one side.

6. The screening fixture for coated sand regeneration according to claim 4, characterized in that: The control panel (2) is installed on the side of the coated sand screening box (1) away from the two discharge ports (7).

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