Screening device for casting sand

Abstract

The utility model provides a screening device for casting sand, which belongs to the technical field of casting raw material processing, and comprises a sand tank, a screening mechanism for removing impurities from the sand is arranged on one side of the sand tank, the screening mechanism comprises a screening box, the bottom of the screening box is connected with a material guide pipe, and a material supply assembly, a magnetic separation assembly and a screening assembly are fixedly arranged on the screening box; the feeding assembly comprises a relay box arranged on the top of the screening box, and the relay box is connected with a vacuum pump used for conveying sand and a spiral conveying module. According to the device, multi-stage treatment work can be carried out on sand through a plurality of assemblies, metal and non-metal impurities in the sand can be effectively removed, the purity of the sand is improved, harm of dust to operators can be reduced through closed conveying, the electromagnetic module can be adjusted, and the service life of the sand is prolonged. The filter plate is convenient to replace and clean, so that the downtime is shortened, and the working efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of casting raw material processing technology, specifically to a screening device for casting sand. Background Technology

[0002] In the modern foundry industry, the quality of the sand directly affects the final quality of the castings. To ensure high precision and good surface quality of the castings, the sand must undergo rigorous screening and processing to remove impurities such as metal shavings, dust, and other non-metallic particles.

[0003] Existing screening equipment typically employs a single screening method, such as a vibrating screen or a rotary screen. While these devices can separate large particles to some extent, they are ineffective at removing fine metal shavings and non-metallic impurities. Furthermore, traditional screening equipment easily generates dust during processing, polluting the working environment and increasing health risks for operators. Utility Model Content

[0004] In view of this, the present invention provides a screening device for casting sand, which can not only perform multi-stage processing of sand through multiple components to effectively remove metal and non-metal impurities and improve the purity of sand, but also reduce the harm of dust to operators through closed conveying, and reduce downtime and improve work efficiency through the adjustability of electromagnetic module and easy replacement and cleaning of filter plate.

[0005] To solve the above-mentioned technical problems, this utility model provides a screening device for casting sand, including a sand trough, a screening mechanism for removing impurities from the sand on one side of the sand trough, the screening mechanism including a screening box, a guide pipe connected to the bottom of the screening box, and a feeding component, a magnetic separation component and a screening component fixed on the screening box.

[0006] The feeding assembly includes a relay box located at the top of the screening box, on which a vacuum pump for conveying sand and a screw conveyor module are respectively connected; the magnetic separation assembly includes a crossbeam located inside the screening box, on which an electromagnetic module is slidably mounted; the screening assembly includes a filter plate located inside the screening box.

[0007] An integrated screening device is composed of a feeding component, a magnetic separation component, and a screening component. By processing the sand material through each component, impurities in the sand material can be effectively removed, which improves screening efficiency, reduces manual intervention, and ensures the purity of the sand material.

[0008] A material conveying pipe is provided on one side of the relay box, and the tail end of the material conveying pipe is set in the sand trough.

[0009] The sand trough is connected to the relay box via a conveying pipe to ensure that the sand can be smoothly transported from the sand trough to the screening box. The closed transmission reduces dust generation and improves the working environment, while also reducing material handling time and labor intensity.

[0010] The screw conveyor module includes a discharge pipe installed on the relay box and a connecting plate installed on the screening box. The discharge pipe is connected between the connecting plate and the relay box. A rotating shaft is installed inside the discharge pipe. One end of the rotating shaft is rotatably installed on the side wall of the connecting plate, and the other end passes through the relay box body. A driven gear is sleeved on the tail end of the rotating shaft, and a screw is sleeved on the rotating shaft.

[0011] The screw conveyor module uses a rotating shaft and screw to evenly transport sand into the screening box, preventing sand from accumulating in the relay box, and is suitable for conveying sand of different particle sizes.

[0012] A drive motor for driving the rotating shaft is fixed on one side of the relay box. A drive gear is connected to the end of the output shaft of the drive motor, and a chain is connected between the drive gear and the driven gear.

[0013] Power is provided by a drive motor, which drives the drive gear to rotate, thereby controlling the chain drive device to rotate. This causes the auger on the shaft to transport the sand, ensuring smooth sand transport and facilitating replacement and maintenance when damaged.

[0014] Several support columns are provided on the crossbeam. The electromagnetic module is slidably mounted on the support columns. The electromagnetic module includes a magnetic plate. A baffle is connected to the end of the magnetic plate. An electromagnetic generator is provided on the baffle. The electromagnetic generator is connected to the magnetic plate through a magnetic wire.

[0015] The electromagnetic module adsorbs metallic impurities in the sand, improving the purity of the sand. At the same time, the sliding electromagnetic module can be pulled out to clean the impurities on the magnetic plate when there are too many impurities.

[0016] Handles are symmetrically arranged on the baffle. This facilitates the movement and adjustment of the electromagnetic module by the operator, increases safety during operation, prevents hand injuries, and allows for adjustment of the electromagnetic module's position as needed to optimize the magnetic separation effect.

[0017] The filter plate is mounted inside the screening box by several fixing blocks, and a pull ring is provided on one side of the filter plate. An opening for replacing the filter plate is provided on the side wall of the screening box.

[0018] The filter plates can be easily disassembled and replaced using pull rings, and can be cleaned, maintained, and replaced through openings. This extends their service life, reduces downtime, and improves production efficiency.

[0019] In summary, compared with the prior art, this application includes at least one of the following beneficial technical effects:

[0020] 1. The sand is evenly conveyed into the screening box by a vacuum pump and a screw conveyor module, ensuring that the sand enters the screening box evenly. Then, the metal impurities in the sand are adsorbed and removed by electromagnetic action. Finally, non-metallic impurities are further screened out by a filter plate, which improves the purity of the sand, improves the production quality of castings, reduces defects, and increases the yield.

[0021] 2. By using relay boxes, vacuum pumps and screw conveyor modules in combination, the dust diffusion is reduced through closed conveying, which not only improves the working environment and reduces the health risks of operators, but also ensures the continuous conveying of sand from the sand trough to the screening box, thereby improving production efficiency.

[0022] 3. The rotary conveyor module uses a rotating shaft and screw to evenly transport sand into the screening box, ensuring uniform distribution of sand, preventing accumulation, and guaranteeing the stability and uniformity of the screening process. At the same time, the use of chain drive reduces mechanical wear and improves the stability and durability of the system.

[0023] 4. The handle on the baffle allows the operator to adjust the position of the electromagnetic module, optimizing the magnetic separation effect. At the same time, the pull ring on the filter plate and the opening on the screening box make the disassembly and replacement of the filter plate more convenient and quick, reducing downtime and improving production efficiency. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of the screening device for casting sand of this utility model;

[0025] Figure 2 This is a front view of the present invention;

[0026] Figure 3 This is the right view of the present invention;

[0027] Figure 4 This is the left view of the present invention;

[0028] Figure 5 This is a schematic diagram of the internal structure of this utility model.

[0029] Explanation of reference numerals in the attached drawings: 1. Sand trough; 2. Screening mechanism; 21. Screening box; 22. Guide pipe; 23. Feeding assembly; 231. Relay box; 232. Vacuum pump; 233. Conveying pipe; 234. Screw conveyor module; 2341. Connecting plate; 2342. Discharge pipe; 2343. Rotating shaft; 2344. Screw; 2345. Driven gear; 2346. Drive motor; 2347. Drive gear; 2348. Chain; 24. Magnetic separation assembly; 241. Crossbeam; 242. Support column; 243. Magnetic plate; 244. Baffle; 245. Electromagnetic generator; 246. Magnetic wire; 247. Handle; 25. Screening assembly; 251. Fixing block; 252. Filter plate; 253. Pull ring. Detailed Implementation

[0030] Appendix to the embodiments of this utility model Figure 1-5 The technical solutions of the embodiments of this utility model are clearly and completely described herein. 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 described embodiments of this utility model are within the protection scope of this utility model.

[0031] like Figure 1-5 As shown: This embodiment provides a screening device for casting sand, including a sand trough 1. A screening mechanism 2 for removing impurities from the sand is provided on one side of the sand trough 1. The screening mechanism 2 includes a screening box 21. A guide pipe 22 is connected to the bottom of the screening box 21. A feeding component 23, a magnetic separation component 24 and a screening component 25 are fixed on the screening box 21.

[0032] The feeding assembly 23 includes a relay box 231 disposed on the top of the screening box 21, and a vacuum pump 232 for conveying sand and a screw conveyor module 234 are respectively connected to the relay box 231; the magnetic separation assembly 24 includes a crossbeam 241 disposed inside the screening box 21, and an electromagnetic module is slidably disposed on the crossbeam 241; the screening assembly 25 includes a filter plate 252 disposed inside the screening box 21.

[0033] An integrated screening device is formed by the feeding component 23, the magnetic separation component 24 and the screening component 25. By processing the sand material through each component, impurities in the sand material can be effectively removed, which improves screening efficiency, reduces manual intervention and ensures the purity of the sand material.

[0034] A conveying pipe 233 is provided on one side of the relay box 231, and the tail end of the conveying pipe 233 is set in the sand trough 1.

[0035] The sand trough 1 is connected to the relay box 231 through the conveying pipe 233 to ensure that the sand can be smoothly conveyed from the sand trough 1 to the screening box 21. Through the closed transmission, dust generation is reduced and the working environment is improved, while the material handling time and labor intensity are reduced.

[0036] The screw conveyor module 234 includes a discharge pipe 2342 disposed on a relay box 231 and a connecting plate 2341 disposed on a screening box 21. The discharge pipe 2342 is connected between the connecting plate 2341 and the relay box 231. A rotating shaft 2343 is rotatably disposed inside the discharge pipe 2342. One end of the rotating shaft 2343 is rotatably disposed on the side wall of the connecting plate 2341, and the other end passes through the body of the relay box 231. A driven gear 2345 is sleeved on the tail end of the rotating shaft 2343, and a screw 2344 is sleeved on the rotating shaft 2343.

[0037] The screw conveyor module 234 uses a rotating shaft 2343 and a screw 2344 to uniformly convey sand into the screening box 21, preventing sand from accumulating in the relay box 231, and is suitable for conveying sand of different particle sizes.

[0038] A drive motor 2346 for driving the rotating shaft 2343 to rotate is fixed on one side of the relay box 231. A drive gear 2347 is connected to the end of the output shaft of the drive motor 2346. A chain 2348 is connected between the drive gear 2347 and the driven gear 2345.

[0039] Power is provided by drive motor 2346, which drives drive gear 2347 to rotate, thereby controlling chain 2348 to drive device to rotate, so that spiral body 2344 on shaft 2343 conveys sand material, ensuring smooth conveying of sand material, and facilitating replacement and maintenance when damaged.

[0040] A number of support columns 242 are provided on the crossbeam 241. The electromagnetic module is slidably mounted on the support columns 242. The electromagnetic module includes a magnetic plate 243. A baffle 244 is connected to the end of the magnetic plate 243. An electromagnetic generator 245 is provided on the baffle 244. The electromagnetic generator 245 is connected to the magnetic plate 243 through a magnetic wire 246.

[0041] The electromagnetic module adsorbs metallic impurities in the sand, improving the purity of the sand. At the same time, the sliding electromagnetic module can be pulled out to clean the impurities on the magnetic plate 243 when there are too many impurities.

[0042] Handles 247 are symmetrically provided on the baffle 244. This facilitates the operator in moving and adjusting the position of the electromagnetic module, increases safety during operation, prevents hand injuries, and allows for adjustment of the electromagnetic module's position as needed to optimize the magnetic separation effect.

[0043] The filter plate 252 is mounted in the screening box 21 by several fixing blocks 251, and a pull ring 253 is provided on one side of the filter plate 252. An opening for replacing the filter plate 252 is provided on the side wall of the screening box 21.

[0044] The filter plate 252 can be disassembled and quickly replaced by pull ring 253, and it can be cleaned, maintained and replaced through the opening. This not only extends its service life, but also reduces downtime and improves production efficiency.

[0045] The method of using this utility model is as follows: First, place the sand to be processed in the sand trough 1. Then, adjust the position of the electromagnetic module in the screening box 21 and start the electromagnetic generator 245 to generate a magnetic field on the magnetic plate 243. Then, start the vacuum pump 232 and use the conveying pipe 233 to suck the sand into the relay box 231. Then, start the screw conveyor module 234 and drive the motor 2346 to drive the rotating shaft 2343 to rotate through the chain 2348 transmission system. The screw 2344 evenly conveys the sand from the discharge pipe 2342 into the screening box 21. When the sand enters the screening box 21, it first passes through the magnetic plate 243 to adsorb the metal impurities in the sand. Then, it rolls down the inclined surface of the magnetic plate 243 onto the filter plate 252 to filter the non-metallic impurities in the sand. The screened pure sand is discharged through the guide pipe 22 at the bottom of the screening box 21 and collected in a designated container.

[0046] Furthermore, it should be noted that, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0047] The above description is the preferred embodiment of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications should also be considered within the protection scope of this utility model.

Claims

1. A screening device for foundry sand, comprising a sand tank (1), characterized in that: One side of the sand groove (1) is provided with a screening mechanism (2) for removing impurities from the sand, the screening mechanism (2) comprises a screening box (21), the bottom of the screening box (21) is connected with a material guide pipe (22), a feeding assembly (23), a magnetic separation assembly (24) and a screening assembly (25) are fixedly arranged on the screening box (21). The feeding assembly (23) comprises a relay box (231) arranged on the top of the screening box (21), a vacuum pump (232) and a screw conveying module (234) for conveying sand are respectively connected to the relay box (231); the magnetic separation assembly (24) comprises a cross beam (241) arranged in the screening box (21), an electromagnetic module is slidably arranged on the cross beam (241); the screening assembly (25) comprises a filter plate (252) arranged in the screening box (21).

2. A screening device for foundry sand as claimed in claim 1, characterized in that: One side of the relay box (231) is provided with a material conveying pipe (233), the tail end of the material conveying pipe (233) is arranged in the sand groove (1).

3. A screening device for foundry sand as claimed in claim 1, characterized in that: The screw conveying module (234) comprises a discharge pipe (2342) arranged on the relay box (231) and a connecting plate (2341) arranged on the screening box (21), the discharge pipe (2342) is connected between the connecting plate (2341) and the relay box (231), a rotating shaft (2343) is rotatably arranged in the discharge pipe (2342), one end of the rotating shaft (2343) is rotatably arranged on the side wall of the connecting plate (2341), the other end of the rotating shaft (2343) penetrates the box body of the relay box (231), a driven gear (2345) is arranged on the tail end of the rotating shaft, and a spiral body (2344) is arranged on the rotating shaft (2343).

4. A screening device for foundry sand as claimed in claim 3, characterized in that: One side of the relay box (231) is fixedly provided with a driving motor (2346) for driving the rotating shaft (2343) to rotate, a driving gear (2347) is connected to the output shaft end of the driving motor (2346), and a chain (2348) is connected between the driving gear (2347) and the driven gear (2345).

5. A screening device for foundry sand as claimed in claim 1, characterized in that: A plurality of support columns (242) are arranged on the cross beam (241), the electromagnetic module is slidably arranged on the support columns (242), the electromagnetic module comprises a magnetic plate (243), an end of the magnetic plate (243) is connected with a baffle (244), an electromagnetic generator (245) is arranged on the baffle (244), and the electromagnetic generator (245) and the magnetic plate (243) are connected through a magnetic conduction wire (246).

6. A screening device for foundry sand as claimed in claim 5, characterized in that: Symmetrical handles (247) are arranged on the baffle (244).

7. A screening device for foundry sand as claimed in claim 1, characterized in that: The filter plate (252) is arranged in the screening box (21) through a plurality of fixing blocks (251), one side of the filter plate (252) is provided with a pull ring (253), and an opening is formed in the side wall of the screening box (21) for replacing the filter plate (252).

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