Sand-iron separating device for foundry

Abstract

The application provides a casting sand-iron separation device and relates to the technical field of casting. The device comprises a screening cylinder and a driving mechanism. One end of the screening cylinder is provided with a feeding hopper. The feeding hopper is in communication with a conveying channel. A conveying belt is arranged in the conveying channel. A magnetic strip is arranged in the conveying channel. A rotary drum is arranged in the screening cylinder. A magnetic separation cylinder is rotatably connected to the rotary drum. The outer side of the magnetic separation cylinder is wrapped with a magnet. The magnet is provided with a notch. A plurality of inclined sand turning plates and clumped material turning plates are arranged on the inner wall of the screening cylinder at intervals. In the process of movement of the casting old sand in the screening cylinder, the preliminary magnetic separation of iron filings, the dispersion of clumped materials, the re-magnetic separation of iron filings in the dispersed clumped materials, and the separation of sand and clumped materials are simultaneously performed in the screening cylinder, thereby improving the quality of the regenerated sand and the separation efficiency.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of casting, in particular to a sand-iron separation device for casting. BACKGROUND

[0002] Casting is a method of obtaining a part or a blank by pouring liquid metal into a casting cavity adapted to the shape of the part and allowing it to cool and solidify. Sand casting is a commonly used casting method that uses casting sand as a mold material, and the cast material is usually a metal that is originally solid but heated to a liquid state. The process generally includes molding, molding, smelting, pouring, cooling, and demolding. During the molding process, fine sand is usually sprayed around the model to fill the gap between the model and the sand. During the demolding stage, the old casting sand on the casting needs to be cleaned, and the old casting sand can be reused after screening.

[0003] During the sand casting process of cast iron parts, due to the flow, pouring, cooling and demolding of molten iron, some fine iron materials may enter the gaps of the sand mold along with the flow of the metal liquid, or adhere to the old sand during demolding, resulting in the presence of iron slag, iron filings and other metal substances in the old casting sand after casting. Therefore, the old casting sand usually contains sand, fine sand, iron filings and clumps, and a magnetic separation device is generally used to separate the iron filings in the old casting sand to reduce the impact of iron filings on the quality of the castings during repeated use. Then, a crushing mechanism is used to crush the clumps, and finally, the crushed sand is screened.

[0004] For example, the patent document with publication number CN221018541U discloses a casting sand recycling and processing device. The device realizes rough screening of the casting sand through a large particle screening mechanism, adsorbs the iron filings through a magnet strip, screens out the large foreign matter and iron filings in the casting sand, realizes a certain degree of preliminary screening, and realizes the crushing of the clumped casting sand in the casting sand through the roller pressing treatment of the casting sand screened through the large particle screening mechanism, so that the casting sand can reduce clumping. Then, the treated casting sand is screened through a shaking screen mechanism, so that the used casting sand can be reused after treatment.

[0005] However, in casting, molten iron and casting sand come into contact, and the casting sand contains a binder. After casting, the binder remains between the sand, causing the sand to clump, resulting in some iron filings, iron slag and casting sand sticking together, and also causing the clumped sand to wrap the iron filings. In the process of recycling the casting sand, the above-mentioned casting sand recycling and processing device screens the clumped material again after crushing, which causes the iron filings and sand in the clumped material to be mixed together. To separate the iron filings in the clumped material, the crushed sand needs to be magnetically separated again, affecting the separation efficiency of the sand and the iron filings. Summary of the Invention

[0006] In view of this, the present invention provides a sand-iron separation device for casting, which solves the technical problem of low separation efficiency caused by the need for multiple screenings and magnetic separations of old casting sand in the prior art.

[0007] To solve the above-mentioned technical problems, the present invention provides a sand-iron separation device for casting, including a screening cylinder and a driving mechanism for driving the screening cylinder to rotate. One end of the screening cylinder is provided with a feeding hopper, which is connected to a conveying channel that enters the interior of the screening cylinder. A conveyor belt is provided in the conveying channel, and multiple push plates are spaced apart on the outer surface of the conveyor belt. A magnetic strip is installed at the end of the conveying channel away from the feeding hopper and between the upper and lower inner surfaces of the conveyor belt.

[0008] A rotating drum is installed inside the screening cylinder, and a magnetic separator is rotatably connected inside the rotating drum. The magnetic separator is wrapped with magnets on the outside, and the magnets have notches near the conveyor belt and along the axis of the rotating drum.

[0009] The inner wall of the screening cylinder is provided with multiple sand flaps at intervals, and the side near the sand flaps is provided with multiple agglomerated material flaps at intervals. The surfaces of the agglomerated material flaps and the sand flaps can intersect with the axial direction of the screening cylinder. The two ends of the screening cylinder are the sand outlet and the agglomerated material outlet, respectively.

[0010] By adopting the above technical solution, under the pushing action of the pusher plate on the conveyor belt, the foundry sand moves along the conveyor channel. The iron filings in the foundry sand are attracted by the magnetic strip and then conveyed with the conveyor belt and output from the top of the conveyor belt, realizing the primary separation of iron filings. The sand and agglomerated material that are not attracted by the magnetic strip fall into the screening cylinder and rotate with the screening cylinder. During the rotation, the agglomerated material collides with each other and also with the sand flap and agglomerated material flap. In this process, the agglomerated material is broken up, and the iron filings inside the agglomerated material are separated out. Then, they fall onto the rotating drum, are attracted by the magnet, and rotate synchronously with the rotating drum. When the iron filings rotate to the part of the rotating drum near the notch, the iron filings fall onto the conveyor belt and are output from the top of the conveyor belt, realizing the secondary separation of iron filings. At the same time, under the flipping of the agglomerated material flap and the sand flap, the sand and agglomerated material are discharged from the sand outlet and the agglomerated material outlet respectively, realizing the separation of sand, iron filings and agglomerated material, and improving the separation efficiency.

[0011] Preferably, the outer side of the screening cylinder is provided with a shell, and multiple fine sand flaps are spaced apart on the inner wall of the shell. The surface of the fine sand flaps can intersect with the axial direction of the shell. The side wall of the screening cylinder is provided with a screen hole, and the lower part of the shell is provided with a fine sand outlet.

[0012] By adopting the above technical solution, the fine sand in the screening cylinder falls into the cavity between the screening cylinder and the shell through the first screen hole, and then is output from the fine sand outlet, thus realizing the separation of fine sand and sand.

[0013] Preferably, the lump material turning plate comprises a plurality of strip-shaped turning plates, and gaps are left between the plurality of turning plates to allow sand to pass through.

[0014] By adopting the above technical scheme, the gaps between the turning plates allow the sand to pass through, and the sand is close to the sand turning plate and moves to the sand outlet under the turning action of the sand turning plate, while the lump material that is not broken up cannot pass through the gaps between the turning plates and moves to the lump material outlet under the turning action of the lump material turning plate, thereby realizing the separation of the sand and the lump material.

[0015] Preferably, a plurality of blocking strips are arranged at intervals on the circumferential side of the rotating drum.

[0016] By adopting the above technical scheme, under the adsorption of the magnet, the rotating drum adsorbs the iron filings on the circumferential side, and the blocking strips can reduce the impact of the lump material on the iron filings on the rotating drum.

[0017] Preferably, a sieve plate is arranged at the end of the screening drum away from the feeding hopper, the sieve plate is provided with sieve holes two, the inner diameter of the sieve holes two is greater than the inner diameter of the sieve holes one, and the two ends of the screening drum are both provided with conical limiting rings, and the inner walls of the limiting rings are obliquely provided with guide plates.

[0018] By adopting the above technical scheme, the sand in the screening drum passes through the sieve plate, enters the limiting ring, and is output from the sand outlet under the guidance of the guide plate, and the lump material enters the limiting ring at the other end of the screening drum and is output from the lump material outlet under the guidance of the guide plate.

[0019] Preferably, a support frame is arranged on the outside of the screening drum, and the conveying channel is located below the rotating drum, the conveying channel comprises a side plate one connected with the support frame, a side plate two connected with the feeding hopper, and a bottom plate arranged below the two side plates, and a feeding port is arranged at the end of the bottom plate away from the feeding hopper.

[0020] By adopting the above technical scheme, the iron filings in the foundry sand are adsorbed by the magnet and are conveyed along the conveying belt, and the sand and the lump material that are not adsorbed fall into the screening drum from the feeding port, thereby realizing secondary separation of the iron filings adhered to the lump material.

[0021] Preferably, the upper end of the side plate one is obliquely provided with an elastic baffle.

[0022] By adopting the above technical scheme, the elastic baffle is conducive to the smooth falling of the iron filings on the rotating drum into the conveying belt and the conveying along the conveying belt.

[0023] Preferably, two rotating rollers are rotatably connected between the side plate one and the side plate two, the conveying belt is in transmission connection with the two rotating rollers, and a conveying belt motor that can drive the rotating rollers to rotate is installed on the support frame.

[0024] By adopting the technical scheme, the conveying belt motor drives the rotating roller to rotate, thereby driving the conveying belt to rotate, and the input of the foundry old sand and the output of the iron filings are realized.

[0025] Preferably, the magnetic separation cylinder is fixedly installed with support plates at two ends, support rods are connected between the support plates and the support frame, the support plates are rotationally connected with the sieve plates, a ring-shaped connecting plate is installed at an end of the rotating drum away from the feeding hopper, and the connecting plate is fixedly connected with the sieve plate.

[0026] By adopting the technical scheme, the driving mechanism drives the screening drum to rotate, the screening drum drives the rotating drum to synchronously rotate through the connecting plate, and the secondary separation of the iron filings in the caked material is realized.

[0027] Preferably, the driving mechanism comprises a driving motor arranged on the support frame, a belt pulley installed on an output shaft of the driving motor, and a synchronous belt connected between the belt pulley and the shell, and the support frame is provided with rollers for supporting the shell.

[0028] By adopting the technical scheme, the driving motor drives the belt pulley to rotate, the belt pulley drives the synchronous belt and the shell to rotate, thereby driving the screening drum and the rotating drum to rotate, and the rollers are beneficial to increasing the stability of the shell in the rotating process.

[0029] The beneficial effects of the above technical scheme of the present application are as follows:

[0030] 1. In the process of movement of the foundry old sand in the screening drum, the preliminary magnetic separation of the iron filings, the dispersion of the caked material, the re-magnetic separation of the iron filings in the dispersed caked material, and the separation of the sand and the caked material are synchronously performed in the screening drum, thereby improving the quality of the regenerated sand and the separation efficiency.

[0031] 2. The fine sand in the foundry old sand falls into the cavity between the screening drum and the shell through the sieve hole one of the screening drum, and is then output from the fine sand outlet, and the sand is discharged from the sand outlet through the sieve hole two of the screening drum, thereby realizing the separation of the fine sand and the sand and being beneficial to improving the recycling rate of the foundry old sand. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 FIG. 1 is a structural schematic view of a foundry sand and iron separation device of the present application;

[0033] Figure 2 FIG. 2 is a side view of the foundry sand and iron separation device of the present application;

[0034] Figure 3 FIG. 3 is an axial sectional view of the foundry sand and iron separation device of the present application;

[0035] Figure 4 FIG. 4 is an enlarged view of position A in FIG. 1; Figure 3

[0036] Figure 5 ​for Figure 3 Enlarged view of point B in the middle;

[0037] Figure 6 This is a radial sectional view of the casting sand-iron separation device of the present invention;

[0038] Figure 7 This is a schematic diagram of the structure of the rotating drum and conveying channel of the present invention.

[0039] In the diagram: 1. Screening cylinder; 11. Screen hole one; 12. Screen plate; 121. Screen hole two; 13. Sand flap; 14. Lumped material flap; 141. Flipping plate; 15. Limiting ring; 151. Guide plate; 16. Sand outlet; 17. Lumped material outlet; 2. Drive mechanism; 21. Drive motor; 22. Pulley; 23. Synchronous belt; 3. Support frame; 31. Feed hopper; 32. Conveying channel; 321. Side plate one; 322. Bottom plate; 3 23. Side plate 2; 324. Feed inlet; 325. Elastic baffle; 33. Rotating roller; 34. Conveyor belt; 341. Push plate; 342. Iron filings outlet; 35. Magnetic strip; 36. Conveyor belt motor; 37. Roller; 4. Housing; 41. Fine sand flap; 42. Fine sand outlet; 43. Partition; 5. Rotary drum; 51. Connecting plate; 52. Baffle bar; 6. Magnetic separator; 61. Support plate; 62. Support rod; 63. Magnet; 631. Notch. Detailed Implementation

[0040] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the following will be described in conjunction with the embodiments of the present invention. Figures 1-7 The technical solutions of the embodiments of the present invention will be clearly and completely described.

[0041] Example

[0042] This embodiment provides a sand-iron separation device for casting, such as... Figure 1 As shown, it includes a screening cylinder 1 and a drive mechanism 2 for driving the screening cylinder 1 to rotate.

[0043] like Figure 1 and Figure 2 As shown, the screening cylinder 1 is rotatably mounted on the support frame 3. The support frame 3 has a feed hopper 31 at one end of the screening cylinder 1. The feed hopper 31 is connected to the conveying channel 32 that enters the interior of the screening cylinder 1. The length direction of the conveying channel 32 is parallel to the axial direction of the screening cylinder 1.

[0044] like Figure 2 and Figure 6 As shown, the conveying channel 32 includes a side plate 321 connected to the support frame 3, a side plate 323 connected to the feed hopper 31, and a bottom plate 322 disposed below the two side plates. The surfaces of the side plate 321 and the side plate 323 are parallel, and a feed inlet 324 is provided on the bottom plate 322 at the end away from the feed hopper 31.

[0045] As shown in Figure 4 and Figure 6 , two rotating rollers 33 are rotatably connected between the side plate one 321 and the side plate two 323, the axes of the two rotating rollers 33 are parallel and perpendicular to the axis of the screening drum 1. One rotating roller 33 is located on the side plate two 323 close to the feeding hopper 31, as shown in Figure 5 , the other rotating roller 33 is located on the side plate two 323 close to the feeding port 324.

[0046] As shown in Figure 2 and Figure 4 , a conveying belt 34 is drivingly connected between the two rotating rollers 33, and a conveying belt motor 36 capable of driving the rotating roller 33 to rotate is installed on the support frame 3.

[0047] As shown in Figure 2 and Figure 4 , the conveying belt 34 has an outer surface and an inner surface, a plurality of push plates 341 are arranged on the outer surface of the conveying belt 34 at intervals, the surface of the conveying belt 34 is perpendicular to the surface of the push plate 341, and the lower end surface of the push plate 341 abuts against the bottom plate 322. The foundry sand entering from the feeding hopper 31 falls onto the conveying channel 32, and under the pushing action of the push plate 341 on the conveying belt 34, the foundry sand travels along the conveying channel 32.

[0048] As shown in Figure 3 and Figure 5 , a magnetic strip 35 is installed between the side plate one 321 and the side plate two 323 of the conveying channel 32, the magnetic strip 35 is located between the upper and lower inner surfaces of the conveying belt 34 and close to one end of the feeding port 324, and the position above the conveying belt 34 close to the feeding hopper 31 is the iron filings outlet 342.

[0049] As shown in Figure 4 and Figure 5 , the foundry sand gradually travels to the end close to the feeding port 324, the iron filings in the foundry sand are attracted by the magnetic strip 35 and then conveyed by the conveying belt 34, can move from below the conveying belt 34 to above the conveying belt 34, and then continue to be conveyed by the conveying belt 34 and discharged from the iron filings outlet 342, realizing the first separation of iron filings. The sand and clumps that are not attracted by the magnetic strip 35 fall into the screening drum 1 through the feeding port 324.

[0050] As shown in Figure 3 , a shell 4 that rotates synchronously with the screening drum 1 is arranged on the outside of the screening drum 1, the axis of the shell 4 is collinear with the axis of the screening drum 1, a cavity is left between the shell 4 and the screening drum 1, and a sieve hole one 11 is arranged on the side wall of the screening drum 1. The two ends of the shell 4 and the two ends of the screening drum 1 are connected by a partition plate 43.

[0051] As shown in Figure 3As shown in the drawings, the inner wall of the shell 4 is provided with a plurality of inclined fine sand turning plates 41 in the axial direction of the shell 4, and the circumferential side of the inner wall of the shell 4 is uniformly distributed with a plurality of fine sand turning plates 41, that is, the inner wall of the shell 4 is provided with a plurality of rows of fine sand turning plates 41 in the axial direction of the shell 4. The plate surface of the fine sand turning plate 41 can intersect the axial direction of the shell 4, and in the process of following the shell 4 during the rotation of the fine sand between the shell 4 and the screening drum 1, the fine sand turning plate 41 can turn the fine sand to move along the axial direction of the shell 4.

[0052] As shown in the drawings, Figure 3 and Figure 4 The circumferential side of the shell 4 is uniformly distributed with a plurality of fine sand outlets 42 near the feed hopper 31, the fine sand turning plate 41 can turn the fine sand to move in the direction close to the fine sand outlet 42, and make the fine sand discharge from the fine sand outlet 42, realize the separation of fine sand.

[0053] As shown in the drawings, Figure 3 The inside of the screening drum 1 is fixedly connected with a rotating drum 5, the inside of the rotating drum 5 is rotatably connected with a magnetic separation cylinder 6, and the axial lines of the screening drum 1, the rotating drum 5 and the magnetic separation cylinder 6 are collinear.

[0054] As shown in the drawings, Figure 3 and Figure 5 The connection mode of the screening drum 1, the rotating drum 5 and the magnetic separation cylinder 6 is that the two ends of the magnetic separation cylinder 6 are fixedly installed with support plates 61, the diameter of the support plate 61 is greater than the outer diameter of the magnetic separation cylinder 6, the part near the feed port 324 in the screening drum 1 is provided with a sieve plate 12, the sieve plate 12 is annular, the support plate 61 is installed in the inside of the sieve plate 12 and is rotatably connected with the sieve plate 12, and the support plate 61 is connected with the support frame 3 through a support rod 62; the end of the rotating drum 5 away from the feed hopper 31 is installed with an annular connecting plate 51, and the connecting plate 51 is fixedly connected with the sieve plate 12.

[0055] As shown in the drawings, Figure 5 and Figure 6 The edge of the support plate 61 is rotatably connected with the inner wall of the rotating drum 5, and since the diameter of the support plate 61 is greater than the outer diameter of the magnetic separation cylinder 6, a gap is left between the magnetic separation cylinder 6 of the rotating drum 5, which is used for installing a magnet 63, the magnet 63 is fixedly arranged on the outside of the magnetic separation cylinder 6, the magnet 63 is arc-shaped, and the lower part of the magnet 63 is provided with a notch 631 in the axial direction of the rotating drum 5.

[0056] As shown in the drawings, Figure 6 and Figure 7 The conveying channel 32 is located below the rotating drum 5, so that the notch 631 is located above the conveying belt 34, and the upper end of the side plate one 321 is obliquely provided with an elastic baffle 325. The elastic baffle 325 is beneficial to the iron filings on the rotating drum 5 to fall smoothly onto the conveying belt 34 and be conveyed along with the conveying belt 34.

[0057] As shown in the drawings, Figure 6 andFigure 7 As shown, the sand and agglomerated material that are not attracted by the magnetic strip 35 fall into the screening cylinder 1 and rotate with the screening cylinder 1. During the rotation, the agglomerated material collides with each other and is broken up. The iron filings inside the agglomerated material are separated. Under the attraction of the magnet 63, the iron filings fall onto the side of the rotating cylinder 5 and then rotate synchronously with the rotating cylinder 5. When the iron filings rotate with the rotating cylinder 5 to the part near the notch 631, the magnet 63 loses its attraction to the iron filings. The iron filings fall onto the conveyor belt 34 below the notch 631 and are output from the iron filings outlet 342, realizing the secondary separation of the broken iron filings.

[0058] like Figure 6 As shown, multiple baffles 52 are spaced apart on the circumference of the rotating drum 5, and the length direction of the baffles 52 is parallel to the axis of the rotating drum 5. The baffles 52 can reduce the impact of agglomerated material in the screening drum 1 on the iron filings on the rotating drum 5, thereby reducing the amount of iron filings falling off the rotating drum 5.

[0059] like Figure 3 As shown, multiple inclined sand flaps 13 are spaced apart on the inner wall of the screening cylinder 1 along the axial direction of the screening cylinder 1. Multiple inclined agglomerated material flaps 14 are spaced apart on the side near the sand flaps 13 along the axial direction of the screening cylinder 1. Multiple sand flaps 13 and multiple agglomerated material flaps 14 are evenly distributed around the periphery of the screening cylinder 1. That is, multiple rows of sand flaps 13 and multiple rows of agglomerated material flaps 14 are provided on the inner wall of the screening cylinder 1 along the axial direction of the screening cylinder 1.

[0060] like Figure 3 and Figure 4 As shown, the sand flap 13 and the agglomerated material flap 14 are inclined in opposite directions. That is, along the axis of the screening cylinder 1, from one end of the feed hopper 31 to one end of the feed inlet 324, the agglomerated material flap 14 is inclined upward and the sand flap 13 is inclined downward.

[0061] like Figure 3 As shown, the agglomerated material flap 14 includes multiple strip-shaped flaps 141, with gaps between the multiple flaps 141 to allow sand to pass through.

[0062] like Figure 2 and 3 As shown, the sieve plate 12 has a second sieve hole 121, the inner diameter of which is larger than the inner diameter of the first sieve hole 11. The end of the screening cylinder 1 near the feed hopper 31 is the agglomerated material outlet 17, and the other end of the screening cylinder 1, that is, the end near the sieve plate 12, is the sand outlet 16. Both ends of the screening cylinder 1 are provided with a frustum-shaped limiting ring 15, and the inner wall of the limiting ring 15 is inclined with a guide plate 151.

[0063] like Figure 3As shown, the gap between the turnover plates 141 can make the sand pass through, so that the sand is located between the sand turnover plate 13 and the clump turnover plate 14, and is moved to the sieve plate 12 under the turnover effect of the sand turnover plate 13, and enters the limiting ring 15 at one end of the screening cylinder 1 through the sieve hole two 121, and is output from the sand outlet 16 under the guiding effect of the guide plate 151; while the clumps that are not broken up cannot pass through the gap between the turnover plates 141, and enter the limiting ring 15 at the other end of the screening cylinder 1 under the turnover effect of the clump turnover plate 14, and are output from the clump outlet 17 under the guiding effect of the guide plate 151, so as to realize the separation of the sand and the clumps. At the same time, the sand turnover plate 13 or the clump turnover plate 14 can also collide with the clumps, which is beneficial to the breaking up of the clumps, so as to be beneficial to the iron scraps in the clumps being attracted by the magnet 63.

[0064] As shown in Figure 1 , the driving mechanism 2 comprises a driving motor 21, a pulley 22 and a synchronous belt 23.

[0065] As shown in Figure 1 , the driving motor 21 is installed on the support frame 3 at one side of the shell 4, the pulley 22 is installed on the output shaft of the driving motor 21, the synchronous belt 23 is drivingly connected between the pulley 22 and the shell 4, and the support frame 3 is rotatably installed with a roller 37 for supporting the shell 4, which is beneficial to increasing the stability of the shell 4 in the rotating process.

[0066] As shown in Figure 1 and Figure 3 , the driving motor 21 drives the pulley 22 to rotate, the pulley 22 drives the synchronous belt 23 and the shell 4 to rotate, so as to drive the screening cylinder 1 and the rotating drum 5 to rotate.

[0067] The implementation principle of the casting sand and iron separation device of the embodiment is as follows:

[0068] The casting old sand is poured into the feeding hopper 31, and the casting old sand falls onto the conveying channel 32 and is pushed along the conveying channel 32 under the pushing effect of the push plate 341 on the conveying belt 34;

[0069] When the casting old sand gradually travels to one end close to the feeding port 324, the iron scraps in the casting old sand are attracted by the magnetic strip 35 and then conveyed by the conveying belt 34, can move from the lower part of the conveying belt 34 to the upper part of the conveying belt 34, and then continue to be conveyed by the conveying belt 34 and discharged from the iron scrap outlet 342, so as to realize the first separation of the iron scraps;

[0070] The fine sand, sand and clumps that are not attracted by the magnetic strip 35 fall into the screening cylinder 1 through the feeding port 324 and rotate with the screening cylinder 1;

[0071] The fine sand falls into the cavity between the screening cylinder 1 and the shell 4 through the sieve hole 11 on the side wall of the screening cylinder 1 and rotates with the shell 4, the fine sand turning plate 41 can turn the fine sand to move towards the fine sand outlet 42, and the fine sand is discharged from the fine sand outlet 42, realizing the separation of the fine sand;

[0072] The agglomerates collide with each other or with the sand turning plate 13 and the agglomerate turning plate 14 during rotation, and the agglomerates are broken in the process, and the iron filings in the agglomerates are separated out, and the iron filings fall on the side of the rotating drum 5 under the adsorption of the magnet 63, and then synchronously rotate with the rotating drum 5, when the iron filings rotate with the rotating drum 5 to the position close to the gap 631, the magnet 63 loses the adsorption of the iron filings, and the iron filings fall to the conveying belt 34 below the gap 631 and are output from the iron filings outlet 342, realizing the secondary separation of the iron filings;

[0073] The sand and the agglomerates not adsorbed by the magnet 63 continue to rotate with the screening cylinder 1, the sand turning plate 13 can turn the sand to move towards the sand outlet 16, and the sand is discharged from the sand outlet 16, realizing the separation of the sand; the agglomerate turning plate 14 can turn the agglomerates to move towards the agglomerate outlet 17, and the agglomerates are discharged from the agglomerate outlet 17, realizing the separation of the agglomerates.

[0074] In addition, it should be noted that in the description of the present application, unless otherwise specified and limited, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication between two elements.

Claims

1. A sand-iron separation device for foundries, comprising a screening drum (1) and a drive mechanism (2) that drives the rotation of the screening drum (1), characterized in that: One end of the screening cylinder (1) is provided with a feeding hopper (31), the feeding hopper (31) is communicated with a conveying channel (32) leading into the inside of the screening cylinder (1), the conveying channel (32) is provided with a conveying belt (34), the outer surface of the conveying belt (34) is provided with a plurality of push plates (341) at intervals, one end of the conveying channel (32) away from the feeding hopper (31) and between the upper and lower inner surfaces of the conveying belt (34) is provided with a magnetic stripe (35); The screening cylinder (1) is provided with a rotating cylinder (5), the rotating cylinder (5) is rotatably connected with a magnetic separation cylinder (6), the outer side of the magnetic separation cylinder (6) is wrapped with a magnet (63), the magnet (63) is provided with a notch (631) near the conveying belt (34) and along the axis direction of the rotating cylinder (5); The inner wall of the screening cylinder (1) is provided with a plurality of sand turning plates (13) at intervals, one side close to the sand turning plates (13) is provided with a plurality of agglomerated material turning plates (14) at intervals, the plate surface of the agglomerated material turning plates (14) and the sand turning plates (13) can be perpendicular to the axial direction of the screening cylinder (1); the two ends of the screening cylinder (1) are respectively a sand outlet (16) and an agglomerated material outlet (17).

2. The sand-iron separation apparatus for foundry use according to claim 1, characterized by: The outer side of the screening cylinder (1) is provided with a shell (4), the inner wall of the shell (4) is provided with a plurality of fine sand turning plates (41) at intervals, the plate surface of the fine sand turning plates (41) can be perpendicular to the axial direction of the shell (4), the side wall of the screening cylinder (1) is provided with a sieve hole one (11), the circumferential side of the shell (4) is uniformly provided with a plurality of fine sand outlets (42).

3. The sand-iron separation apparatus for foundry use according to claim 2, characterized by: The agglomerated material turning plate (14) comprises a plurality of strip-shaped turning plates (141), and a gap is left between the plurality of turning plates (141) to allow sand to pass through.

4. The sand-iron separation apparatus for foundry use according to claim 3, characterized by: The circumferential side of the rotating cylinder (5) is provided with a plurality of blocking strips (52) at intervals.

5. The sand-iron separation apparatus for foundry use according to claim 4, characterized by: One end of the screening cylinder (1) away from the feeding hopper (31) is provided with a sieve plate (12), the sieve plate (12) is provided with a sieve hole two (121), the inner diameter of the sieve hole two (121) is larger than the inner diameter of the sieve hole one (11), the two ends of the screening cylinder (1) are provided with a conical limiting ring (15), and the inner wall of the limiting ring (15) is obliquely provided with a guide plate (151).

6. The sand-iron separation apparatus for foundry use according to claim 5, characterized by: The outer side of the screening cylinder (1) is provided with a support frame (3), the conveying channel (32) is located below the rotating cylinder (5), the conveying channel (32) comprises a side plate one (321) connected with the support frame (3), a side plate two (323) connected with the feeding hopper (31), and a bottom plate (322) arranged below the two side plates, and the bottom plate (322) is provided with a feeding port (324) away from the feeding hopper (31).

7. The sand-iron separation apparatus for foundry sand according to claim 6, characterized in that: The upper end of the side plate one (321) is obliquely provided with an elastic baffle (325).

8. The sand-iron separation apparatus for foundry use according to claim 7, characterized by: The side plate one (321) and the side plate two (323) are rotatably connected with two rotating rollers (33), the conveying belt (34) is in transmission connection between the two rotating rollers (33), and the support frame (3) is provided with a conveying belt motor (36) capable of driving the rotating roller (33) to rotate.

9. The sand-iron separation apparatus for foundry sand according to claim 8, characterized by: Both ends of the magnetic separation cylinder (6) are fixedly provided with support plates (61), support rods (62) are connected between the support plates (61) and the support frame (3), the support plates (61) are rotationally connected with the sieve plates (12), a ring-shaped connecting plate (51) is installed on the rotary drum (5) away from the feeding hopper (31), and the connecting plate (51) is fixedly connected with the sieve plate (12).

10. The sand-iron separation apparatus for foundry sand according to claim 9, characterized in that: The driving mechanism (2) comprises a driving motor (21) arranged on the support frame (3), a belt pulley (22) mounted on an output shaft of the driving motor (21), and a synchronous belt (23) connected between the belt pulley (22) and the shell (4), and the support frame (3) is provided with a roller (37) for supporting the shell (4).

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