Magnetic separation device for foundry sand recovery

Abstract

The utility model discloses a magnetic separation device for foundry sand recovery, which comprises a recovery box, the top of the recovery box is communicated with a sand feeding hopper, the communicated part of the sand feeding hopper and the recovery box is connected with a crushing roller through a bearing seat, and the upper surface of the recovery box is fixedly provided with a first motor; according to the waste sand screening device, the first motor is started to drive the crushing roller fixed to the output end of the first motor to rotate, so that cakes in waste sand are crushed in the stage of penetrating through the gap between the sand feeding hopper and the crushing roller and then fall into the screening barrel, and then the second motor is started to drive the transmission rod fixed to the output end of the second motor to rotate; according to the magnetic separation device, a plurality of sand overturning plates arranged on the surface of a transmission rod are promoted to overturn crushed waste sand, so that particles meeting the particle size requirement of a filter screen fall onto an inclined plate after being separated from a screening barrel, and magnetic substances are absorbed by an electromagnet mounted in a V-shaped cover until molding sand is guided out through a sand discharging nozzle. Crushing treatment of cakes in waste sand can be achieved, and therefore the molding sand recovery rate and the magnetic separation efficiency are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to foundry process production equipment technical field especially relates to casting sand recycling is with magnetic separation device. BACKGROUND

[0002] Sand in casting is used to make the material of the model. Sand is generally mixed by casting sand, sand binder and auxiliary materials such as modeling materials according to certain proportion. Sand can be divided into clay sand, water glass sand, cement sand, resin sand and so on according to the binder used. Among them, sand is mostly scattered into fine sand particles under the action of high temperature in metal casting, but part of it is in block shape, and the waste sand is mostly attached with invalid or non-invalid binder, which cannot be directly used for secondary modeling. If it cannot be effectively recycled, sand can only be used once, and a large amount of industrial waste is discarded every year, causing resource waste and environmental pollution.

[0003] After searching, the publication number CN214382913U discloses a kind of for casting sand recycling magnetic separation device, including tower-shaped magnetic separation bin, magnetic separation bin top is equipped with feed hopper near side wall position, feed hopper below is equipped with the material distribution component that can evenly spread along bin wall, magnetic separation bin outer side wall is equipped with controllable magnetic attraction cover that can be opened and closed, magnetic attraction cover is cylindrical and barrel top is lower than material distribution component, magnetic separation bin bottom edge is equipped with multiple supporting legs, and magnetic separation bin bottom middle position is equipped with discharge port. The sand to be treated is in dispersed form in the magnetic separation bin, the mutual block is small, and the sand is evenly spread by the material distribution component and close to the inner side wall of the magnetic separation bin, the magnetic material in the sand can be attracted by the peripheral magnetic attraction cover, the magnetic selection quality and efficiency are significantly improved, the adverse effects of magnetic material on modeling and product quality are avoided, and the device has great popularization value and broad application prospect.

[0004] However, the above-mentioned casting sand recycling magnetic separation device does not have a crushing structure, and the clumps in the waste sand contain some magnetic substances and intact sand particles, which results in low casting sand recovery rate and incomplete absorption of magnetic substances. Since the sand and impurities are not separated and discharged, the final recovered sand needs to be screened and processed.

[0005] Therefore, a casting sand recycling magnetic separation device is proposed, which has high sand recovery rate and good impurity removal effect, thereby solving the problems in the above background technology. Utility model content

[0006] The utility model relates to foundry process production equipment technical field especially relates to casting sand recycling is with magnetic separation device.

[0007] In order to achieve the above object, the utility model discloses the following technical scheme: casting sand recovery is with magnetic separation device, including the recovery box, the top of recovery box is connected with the sand inlet hopper, and the sand inlet hopper is communicated with the recovery box and is connected with the crushing roller through the bearing seat, the first motor is fixedly installed on the recovery box upper surface, and the first motor output is fixedly connected with the crushing roller through the shaft coupling, the screen drum is welded in the recovery box, and the both ends of screen drum are welded with the communicating mouth, the communicating mouth of screen drum top end is communicated with the sand inlet hopper, and the communicating mouth of screen drum bottom end is welded with the filter screen in, the second motor is fixedly installed on the recovery box outer wall surface corresponding screen drum, and the second motor output is fixedly connected with the transmission rod, and the transmission rod extends to the part of screen drum inboard and is installed with a plurality of sanding plates, the left side of screen drum upper part is provided with the side opening, and the periphery of side opening is welded with the impurity removal shell, the lower portion of screen drum is welded with the inclined plate, and the edge of inclined plate top surface is welded with two edge baffle plates, the V-shaped cover is welded between two edge baffle plates, and the electromagnet is fixedly installed in the V-shaped cover inboard, the impurity removal spout is arranged through the impurity removal shell on the left side of recovery box, and the sand outlet is arranged on the right side of recovery box corresponding the inclined plate.

[0008] As further description of the above technical scheme: the left side of recovery box upper portion is fixed with the cylinder, and the piston rod of cylinder is fixedly connected with the circular arc plate, and the circular arc plate extends to the inboard of screen drum side opening.

[0009] As further description of the above technical scheme: the upper end and the lower end of impurity removal shell are provided with the inclined portion, and the inclined portion of impurity removal shell lower end is provided with the opening communicated with the impurity removal spout.

[0010] As further description of the above technical scheme: the left and right sides of recovery box bottom are welded with the supporting leg.

[0011] As further description of the above technical scheme: the V-shaped cover and the electromagnet are provided with multiple groups, and the multiple groups of V-shaped cover and electromagnet are parallelly arranged about the inclined plate.

[0012] As further description of the above technical scheme: the cross section of V-shaped cover is inverted V-shaped structure, and the mounting plate matched with the electromagnet is welded in the inboard of V-shaped cover.

[0013] As further description of the above technical scheme: the cross section of filter screen is circular arc structure, and the arc structure of filter screen is matched with the rotation track of sanding plate.

[0014] The utility model has the advantages of:

[0015] The utility model discloses a first motor is started with the rotation of the fixed broken roll of output end, promotes the caking in the waste sand to be broken in the sand inlet and broken roll gap stage, falls into the sieve tube again, then the rotation of the fixed transmission rod of output end of second motor is started with, promotes the sand turning plate of setting of a plurality of transmission rod surfaces to the waste sand after breaking and makes, the particle that meets the particle size requirement of filter screen falls into the inclined plate after the sieve tube, and the absorption of magnetic material is realized to the electromagnet of installing in V type cover, until the sand is guided from the sand nozzle, compared with prior art magnetic separation device, can realize the broken processing of caking in waste sand, thereby improving sand recovery rate and magnetic separation efficiency, simultaneously, through the side opening of the left side of sieve tube upper portion that the circular arc plate is started with cylinder and is brought away, promotes the blocky binder and blocky metal that accumulated in the sieve tube under the action of sand turning plate and is guided into the impurity removal shell from the side opening, makes the blocky binder and blocky metal be guided from the impurity removal nozzle, on the one hand, the separation of sand and impurity is convenient, on the other hand, makes the sieve tube be completely emptied, is favorable for the processing of subsequent waste sand. BRIEF DESCRIPTION OF DRAWINGS

[0016] Fig. 1 It is structure schematic diagram for the utility model casting sand recycling magnetic separation device;

[0017] Fig. 2 It is internal structure schematic diagram for the utility model casting sand recycling magnetic separation device;

[0018] Fig. 3 It is inclined plate structure schematic diagram for the utility model casting sand recycling magnetic separation device.

[0019] LEGEND:

[0020] 1, recycling box;2, sand inlet;3, first motor;4, broken roll;5, second motor;6, impurity removal nozzle;7, cylinder;8, support leg;9, sand nozzle;10, sieve tube;11, communication nozzle;12, transmission rod;13, sand turning plate;14, filter screen;15, inclined plate;16, V type cover;17, electromagnet;18, side opening;19, circular arc plate;20, impurity removal shell;21, edge baffle. DETAILED DESCRIPTION

[0021] The technical scheme in the embodiments of the utility model will be apparently and completely described below with the drawings in the embodiments of the utility model, and apparently, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor belong to the range of protection of the utility model.

[0022] According to the embodiments of the utility model, the casting sand recycling magnetic separation device is provided.

[0023] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments, such as... Figs. 1-3 As shown, the magnetic separator for recovering foundry sand according to an embodiment of the present invention includes a recovery box 1. A sand inlet hopper 2 is connected to the top of the recovery box 1, and a crushing roller 4 is connected to the connection between the sand inlet hopper 2 and the recovery box 1 via a bearing seat. A first motor 3 is fixedly installed on the upper surface of the recovery box 1, and the output end of the first motor 3 is fixedly connected to the crushing roller 4 via a coupling. A screening cylinder 10 is welded inside the recovery box 1, and connecting nozzles 11 are welded to both ends of the screening cylinder 10. A connecting nozzle 11 is connected to the top of the screening cylinder 10. The nozzle 11 is connected to the sand inlet hopper 2, and a filter screen 14 is welded inside the nozzle 11 at the bottom of the screening cylinder 10. A second motor 5 is fixedly installed on the outer wall of the recovery box 1 corresponding to the screening cylinder 10, and a transmission rod 12 is fixedly connected to the output end of the second motor 5. Several sand-turning plates 13 are installed around the part of the transmission rod 12 extending to the inner side of the screening cylinder 10. A side opening 18 is opened on the upper left side of the screening cylinder 10, and a debris discharge shell 20 is welded around the periphery of the side opening 18. An inclined plate is welded to the bottom of the screening cylinder 10. 15, and two edge baffles 21 are welded to the edge of the top surface of the inclined plate 15. A V-shaped cover 16 is welded between the two edge baffles 21. An electromagnet 17 is fixedly installed inside the V-shaped cover 16. A discharge nozzle 6 is provided on the left side of the recycling box 1 through the discharge shell 20. A sand discharge nozzle 9 is provided on the right side of the recycling box 1 corresponding to the inclined plate 15. The surface of the crushing roller 4 is provided with several crushing cone teeth to crush the lumps in the waste sand. In this patent, we only use the first motor 3, the second motor 5, the cylinder 7, and the electromagnet 17 without improving their structure and function. For those skilled in the art, their setting method, installation method, and electrical connection method can be adjusted and operated according to the requirements of their instruction manual. They will not be described in detail here. The first motor 3, the second motor 5, the cylinder 7, and the electromagnet 17 are all provided with their matching control switches. The installation position of the control switches is selected according to the actual use requirements to facilitate the operation and control by the operator.

[0024] In one embodiment, a cylinder 7 is inserted and fixed on the upper left side of the recycling box 1, and an arc plate 19 is fixed to the piston rod of the cylinder 7. The arc plate 19 extends to the inside of the side opening 18 of the screening cylinder 10. By starting the cylinder 7, the arc plate 19 is driven to disengage from the side opening 18 on the upper left side of the screening cylinder 10, so that the blocky adhesive and blocky metal accumulated in the screening cylinder 10 are guided into the impurity discharge shell 20 through the side opening 18 under the action of the sand turning plate 13, so that the blocky adhesive and blocky metal are discharged from the impurity discharge nozzle 6. The arc plate 19 can fill the gap of the side opening 18 so that the impurities in the screening cylinder 10 can be removed when the sand discharge nozzle 9 no longer discharges molding sand.

[0025] In one embodiment, the upper end and the lower end of the impurity removal shell 20 are provided with inclined portions, and the inclined portion of the lower end of the impurity removal shell 20 is provided with an opening communicated with the impurity removal nozzle 6. The inclined portion is arranged to facilitate the discharge of the blocky binder and the blocky metal, and facilitate the sorting and recycling of the blocky metal.

[0026] In one embodiment, the left and right sides of the bottom of the recycling box 1 are welded with support legs 8. The support legs 8 are arranged to improve the support effect of the recycling box 1.

[0027] In one embodiment, the V-shaped cover 16 and the electromagnet 17 are provided in multiple groups, and the multiple groups of V-shaped cover 16 and electromagnet 17 are arranged in parallel with respect to the inclined plate 15. The multiple groups of V-shaped cover 16 and electromagnet 17 are arranged to improve the degree of absorption of magnetic substances.

[0028] In one embodiment, the V-shaped cover 16 has an inverted V-shaped cross section, and the inner side of the V-shaped cover 16 is welded with a mounting plate matched with the electromagnet 17. The mounting plate is arranged to facilitate the installation of the electromagnet 17.

[0029] In one embodiment, the filter screen 14 has a circular arc cross section, and the arc structure of the filter screen 14 is matched with the rotation track of the sand turning plate 13. The circular arc filter screen 14 is arranged to avoid interference with the rotation of the sand turning plate 13, and facilitate the filtering of the sand.

[0030] Working principle:

[0031] In use, first, the casting waste sand is put into the sand inlet hopper 2. The first motor 3 is started to drive the fixed broken roller 4 at the output end to rotate, so that the clumps in the waste sand are broken when passing through the gap between the sand inlet hopper 2 and the broken roller 4, and then fall into the screening cylinder 10. Then, the second motor 5 is started to drive the fixed transmission rod 12 at the output end to rotate, so that the plurality of sand turning plates 13 arranged on the surface of the transmission rod 12 turn the broken waste sand, so that the particles meeting the particle size requirement of the filter screen 14 fall onto the inclined plate 15 after being separated from the screening cylinder 10. Then, the electromagnet 17 installed in the V-shaped cover 16 is started to absorb the magnetic substances on the inclined plate 15, and the sand is discharged from the sand discharge nozzle 9. When the sand discharge nozzle 9 no longer discharges sand, the circular arc plate 19 is driven by the cylinder 7 to separate from the side opening 18 formed on the upper left side of the screening cylinder 10, so that the blocky binder and the blocky metal accumulated in the screening cylinder 10 are guided into the impurity removal shell 20 through the side opening 18 under the action of the sand turning plate 13, and then the blocky binder and the blocky metal are discharged from the impurity removal nozzle 6.

[0032] Finally, it should be noted that: the above only for the preferred embodiments of the present application, and is not intended to limit the present application, although the foregoing embodiments of the present application has been described in detail, for the skilled in the art, it still can be modified, or for part of the technical features of the equivalent replacement, the spirit and principles of the present application, made any modification, equivalent replacement, improvement, etc., should be included within the scope of the present application.

Claims

1. A magnetic separation device for recycling molding sand for foundry use, comprising a recycling tank (1), characterized in that: The top of the recycling box (1) is communicated with a sand inlet hopper (2), and the sand inlet hopper (2) is connected with the recycling box (1) through a bearing seat and is connected with a crushing roller (4), a first motor (3) is fixedly installed on the upper surface of the recycling box (1), and the output end of the first motor (3) is fixedly connected with the crushing roller (4) through a shaft coupling, a screening cylinder (10) is welded in the recycling box (1), and the two ends of the screening cylinder (10) are both welded with a communication nozzle (11), the communication nozzle (11) at the top end of the screening cylinder (10) is communicated with the sand inlet hopper (2), and the communication nozzle (11) at the bottom end of the screening cylinder (10) is welded with a filter screen (14) in it, a second motor (5) is fixedly installed on the outer wall surface of the recycling box (1) and corresponds to the screening cylinder (10), the output end of the second motor (5) is fixedly connected with a transmission rod (12), and the part of the transmission rod (12) extending to the inside of the screening cylinder (10) is surrounded by a plurality of sand turning plates (13), a side opening (18) is formed in the upper left side of the screening cylinder (10), and a tramp removal shell (20) is welded on the periphery of the side opening (18), an inclined plate (15) is welded below the screening cylinder (10), two edge baffles (21) are welded on the top surface edge of the inclined plate (15), a V-shaped cover (16) is welded between the two edge baffles (21), and an electromagnet (17) is fixedly installed on the inside of the V-shaped cover (16), a tramp removal nozzle (6) is arranged through the tramp removal shell (20) on the left side of the recycling box (1), and a sand discharge nozzle (9) is arranged on the right side of the recycling box (1) and corresponds to the inclined plate (15).

2. The magnetic separation device for molding sand recycling according to claim 1, characterized in that: A gas cylinder (7) is fixedly inserted on the upper left side of the recycling box (1), and a circular arc plate (19) is fixedly connected with the piston rod of the gas cylinder (7), and the circular arc plate (19) extends to the inside of the side opening (18) of the screening cylinder (10).

3. The magnetic separation device for molding sand recycling according to claim 1, characterized in that: The upper end and the lower end of the tramp removal shell (20) are both provided with inclined portions, and the inclined portion of the lower end of the tramp removal shell (20) is provided with an opening communicated with the tramp removal nozzle (6).

4. The magnetic casting sand reclaiming device according to claim 1, characterized in that: The left and right sides of the bottom of the recycling box (1) are both welded with a supporting leg (8).

5. The magnetic separation device for molding sand recycling according to claim 1, characterized in that: The V-shaped cover (16) and the electromagnet (17) are provided with multiple groups, and the multiple groups of V-shaped covers (16) and electromagnets (17) are arranged in parallel with respect to the inclined plate (15).

6. The magnetic casting sand reclaiming device according to claim 1, characterized in that: The V-shaped cover (16) is in an inverted V-shaped structure in cross section, and an installation plate matched with the electromagnet (17) is welded on the inside of the V-shaped cover (16).

7. The magnetic casting sand reclaiming device according to claim 1, characterized in that: The filter screen (14) is in a circular arc structure in cross section, and the arc structure of the filter screen (14) is matched with the rotation track of the sand turning plate (13).

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