Waste sand recovery device for casting processing

Abstract

The invention relates to the technical field of molding sand recycling and processing, in particular to a waste sand recycling device for casting processing, which comprises a screening device for screening waste sand and a feeding mechanism for conveying casting sand screened to be qualified, and a tank body communicated with the feeding mechanism is vertically arranged on one side of the screening device. The interior of the tank body is rotationally connected with a rotating shaft which is vertically arranged; through the synergistic effect of the feeding mechanism, the magnetic separation structure and the transmission structure, the treatment efficiency can be automatically adjusted according to the feeding amount of waste sand; when the feeding amount is increased, the magnetic separation structure moves downwards due to the weight of materials, then the transmission structure is triggered to drive the magnetic separation structure to rotate, and the processing capacity is improved; when the feeding amount is further increased, redundant materials can be distributed to other magnetic separation structures to be treated, it is ensured that the device can efficiently cope with different feeding amounts all the time, and the problem that a traditional device is insufficient in treatment capacity or idles due to the feeding amount change is solved.

Description

Technical Field

[0001] The invention relates to the technical field of molding sand recovery processing, and in particular to a waste sand recovery device for casting processing. Background Art

[0002] In the production process of the foundry industry, a large amount of waste sand is generated. If these waste sands cannot be effectively treated and recycled, on the one hand, it will cause a huge waste of resources, and on the other hand, random discharge will cause serious pollution to the ecological environment;

[0003] At present, the waste sand recovery devices on the market adopt fixed processing parameters. When the feed rate changes, either the processing capacity is insufficient, resulting in a backlog of waste sand, affecting the production progress; or the equipment runs idle, causing energy waste and equipment loss. Although some devices can be adjusted manually, they cannot match the changes in feed rate in real time and accurately. There are problems such as adjustment lag and inaccuracy, which makes it difficult to meet the needs of efficient and energy-saving production. Therefore, a waste sand recovery device for casting processing is proposed to facilitate automatic adjustment of the waste sand processing efficiency according to the feed rate of waste sand, avoid high energy consumption operation, and at the same time, reduce unnecessary wear of equipment and extend the service life of equipment. Summary of the invention

[0004] In response to the problems in the prior art, the present invention provides a waste sand recovery device for casting processing, which is convenient for automatically adjusting the waste sand processing efficiency according to the feed amount of waste sand, avoiding high energy consumption operation, and at the same time, reducing unnecessary wear of equipment and extending the service life of equipment.

[0005] The technical solution adopted by the present invention to solve its technical problems is a waste sand recovery device for casting processing, including a screening device for screening waste sand, and a feeding mechanism for conveying the screened qualified casting sand, a tank body connected to the feeding mechanism is vertically arranged on one side of the screening device, a vertically arranged rotating shaft is rotatably connected inside the tank body, a plurality of groups of magnetic separation structures are slidably connected to the rotating shaft from bottom to top, a discharging structure is arranged below each group of the magnetic separation structures, and a transmission structure for automatic switching and the transmission effect of the rotating shaft is arranged at the bottom of the magnetic separation structure.

[0006] Specifically, the magnetic separation structure includes a conical drum that is larger at the top and smaller at the bottom. The rotating shaft passes through the axis of the conical drum and is slidably connected to the conical drum. The upper edge of the conical drum is rotatably connected to a mounting ring. An arc-shaped magnetic plate is provided under the conical drum. The arc-shaped magnetic plate is fixedly connected to the inner wall of the tank body through a connecting rod. A discharge port is provided through the inner bottom of the conical drum.

[0007] Specifically, the feeding mechanism is connected to a side close to the tank body with several groups of obliquely arranged connecting pipes, and the several groups of connecting pipes are respectively located above the corresponding conical rotating drums. The lower surface of the mounting ring is circumferentially distributed with several groups of supporting structures, and the supporting structure includes a sliding tube, and a vertically arranged sliding rod is provided in the sliding tube. The sliding rod is fixedly connected to the inner wall of the sliding tube through a spring, and the outer side of the sliding tube is fixedly connected to the inner wall of the tank body through a connecting piece, and the upper end of the sliding rod is fixedly connected to the mounting ring.

[0008] Specifically, the discharging structure includes a first discharging cylinder and a second discharging cylinder arranged in an arc shape, the upper surfaces of the first discharging cylinder and the second discharging cylinder are both provided with an arc groove, the first discharging cylinder is located below the arc-shaped magnetic attraction plate, and the outer sides of the first discharging cylinder and the second discharging cylinder are fixedly connected to the inner wall of the tank body through a support rod;

[0009] The bottom of the first discharging barrel is connected to a first discharging pipe arranged obliquely, a first discharging pipe arranged vertically is arranged on the outside of the tank body, one end of the first discharging pipe passes through the tank body and is connected to the inside of the first discharging pipe; the bottom of the second discharging barrel is connected to a second discharging pipe arranged obliquely, a second discharging pipe arranged vertically is arranged on the outside of the tank body, one end of the second discharging pipe passes through the tank body and is connected to the inside of the second discharging pipe.

[0010] Specifically, the transmission structure includes several groups of rotating seats fixedly connected to the rotating shaft, the rotating seat is located above the discharging structure, the upper surface of the rotating seat is provided with a polygonal groove, the upper surface of the tank body is fixedly connected to a driving motor, and the output end of the driving motor is fixedly connected to the upper end of the rotating shaft; the transmission structure also includes a polygonal clamping block fixedly connected to the lower surface of the conical rotating drum, and the clamping block is clamped with the clamping groove after the conical rotating drum moves downward.

[0011] Specifically, a material discharge adjustment structure is provided at one end of the connecting pipe away from the feeding pipe, and the material discharge adjustment structure includes a baffle fixedly arranged above the feeding pipe, and the upper end of the baffle is fixedly connected to a horizontally arranged cross plate, and the cross plate is fixedly connected to the lower end of the slide rod.

[0012] By adopting the above technical solution, when the conical drum moves downward, it drives the sliding rod to move downward, and the sliding rod is connected to the baffle, which in turn drives the baffle to move downward. After the baffle moves downward, the discharge amount of a group of connecting pipes located below is reduced to adapt to the change in the amount of waste sand input, thereby avoiding blockage or untimely treatment in subsequent separation and discharge links due to excessive sand input, and further ensuring the treatment effect of the waste sand.

[0013] Specifically, the screening device includes a feed funnel with an upward opening, the lower part of the feed funnel is connected to an electric screening machine, and one side of the electric screening machine is connected to a collection box through a pipeline.

[0014] Specifically, the feeding mechanism includes a vertically arranged feeding pipe, an electric spiral feeding shaft is arranged in the feeding pipe, and the lower end of the feeding pipe is communicated with the inside of the collecting box.

[0015] Specifically, the bottom of the tank body is fixedly connected with support legs, and reinforcement members are fixedly connected between a plurality of groups of the support legs.

[0016] Beneficial effects of the present invention:

[0017] (1) The waste sand recovery device for casting processing described in the present invention can automatically adjust the processing efficiency according to the feed amount of waste sand through the coordinated action of the feeding mechanism, the magnetic separation structure and the transmission structure; when the feed amount increases, the magnetic separation structure will move downward due to the weight of the material, thereby triggering the transmission structure to drive it to rotate, thereby improving the processing capacity; when the feed amount further increases, the excess material will be distributed to other magnetic separation structures for processing, ensuring that the device can always efficiently cope with different feed amounts, thereby avoiding the problem of insufficient processing capacity or equipment idling due to changes in feed amount in traditional devices.

[0018] (2) The waste sand recovery device for casting processing described in the present invention relies on a transmission structure and a magnetic separation structure, so that during the magnetic separation process, as the feed amount increases, the magnetic separation structure can not only rotate to improve the contact degree between the magnetically affinitive material and the arc-shaped magnetic suction plate and enhance the adsorption effect, but also automatically adjust the distance with the arc-shaped magnetic suction plate to increase the adsorption force, further improve the magnetic separation efficiency, and ensure the high purity of the recovered sand.

[0019] (3) In the waste sand recovery device for casting processing described in the present invention, non-magnetic material is used as the molding sand required for casting and is discharged from the first discharge pipe. It can be accurately separated from magnetic impurities to ensure the purity of the recovered sand, which can be directly used in casting production to improve the quality of casting products; magnetic material is discharged from the second discharge pipe, which is convenient for centralized collection and realizes the recycling of resources. Magnetic material and non-magnetic material are discharged separately, making the magnetic separation process clearer and more orderly. There is no need to take into account the discharge of materials of different properties during the discharge process, thereby improving the magnetic separation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0021] Figure 1 is an axonometric view of the present invention;

[0022] Figure 2 It is a partial cross-sectional view of the tank body and the feeding pipe of the present invention;

[0023] Figure 3 for Figure 2 A magnified image of area A;

[0024] Figure 4 It is a schematic diagram of the cross-sectional structure of the tank body of the present invention;

[0025] Figure 5 for Figure 4 A magnified view of area B;

[0026] Figure 6 It is a schematic diagram of the internal structure of the tank body of the present invention;

[0027] Figure 7 for Figure 6 A magnified view of region C;

[0028] Figure 8 It is a schematic diagram of the structure of the conical drum of the present invention;

[0029] In the figure: 1. tank body; 2. rotating shaft; 3. conical rotating drum; 4. mounting ring; 5. arc-shaped magnetic plate; 6. connecting rod; 7. discharge port; 8. connecting pipe; 9. sliding pipe; 10. sliding rod; 11. spring; 12. first discharge barrel; 13. second discharge barrel; 14. arc-shaped slot; 15. supporting rod; 16. first discharge pipe; 17. first discharge pipe; 18. second discharge pipe; 19. second discharge pipe; 20. rotating seat; 21. slot; 22. driving motor; 23. block; 24. baffle; 25. cross plate; 26. feeding funnel; 27. electric screening machine; 28. collecting box; 29. ​​feeding pipe; 30. electric spiral feeding shaft; 31. supporting leg; 32. reinforcement. DETAILED DESCRIPTION

[0030] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0031] In order to automatically adjust the waste sand processing efficiency according to the feed amount of waste sand, avoid high energy consumption operation, and at the same time reduce unnecessary wear of equipment and extend the service life of equipment, as an embodiment of the present invention, Figure 1 , Figure 2 , Figure 3 As shown, a waste sand recovery device for casting processing described in the present invention includes a screening device for screening waste sand, and a feeding mechanism for conveying the screened qualified casting sand, a tank body 1 connected to the feeding mechanism is vertically arranged on one side of the screening device, a vertically arranged rotating shaft 2 is rotatably connected inside the tank body 1, a plurality of groups of magnetic separation structures are slidably connected to the rotating shaft 2 from bottom to top, a discharging structure is arranged below each group of the magnetic separation structures, and a transmission structure which automatically switches the transmission effect with the rotating shaft 2 is arranged at the bottom of the magnetic separation structure.

[0032] When in use, the waste sand is transported to the screening device, and the screening device is used to perform preliminary processing on the waste sand to separate large particles of impurities. The waste sand after preliminary screening enters the feeding mechanism, and the feeding mechanism is used to transport the waste sand to the tank body 1. At the same time, the waste sand falls on the magnetic separation structure located at the bottom of the tank body 1. The magnetic separation structure is used to absorb the magnetically affinitive materials in the waste sand, while the non-magnetically affinitive materials are discharged through the discharging structure, thereby ensuring the purity of the recovered sand.

[0033] When the amount of magnetically responsive materials adsorbed on the magnetic separation structure at the bottom of the tank body 1 reaches a certain amount, the weight of the waste sand together with the weight of the waste sand can drive the magnetic separation structure to move downward, and the transmission structure can drive the magnetic separation structure to rotate. When the magnetic separation structure rotates, the waste sand treatment efficiency can be improved, and the waste sand treatment effect can be ensured; correspondingly, if the waste sand conveying amount of the feeding mechanism is small, and the amount of magnetically responsive materials adsorbed on the magnetic separation structure is small, the magnetic separation structure will not move downward, thereby reducing the frequent up and down movement of the magnetic separation structure and reducing the energy consumption of the rotation of the rotating shaft 2;

[0034] When the feeding mechanism further increases the conveying capacity of waste sand, the magnetic separation structure located at the bottom of the tank body 1 cannot meet the processing needs. The feeding mechanism is used to transport part of the material to another group of magnetic separation structures. At the same time, the weight of the waste sand is used to drive the magnetic separation structure to move downward. At the same time, the transmission structure is used to drive the magnetic separation structure to rotate, thereby improving the processing efficiency of the magnetic separation structure for waste sand. At the same time, it is convenient to automatically adjust the processing efficiency of waste sand according to the feed amount of waste sand, avoid high energy consumption operation, reduce unnecessary wear of equipment, and extend the service life of equipment.

[0035] In order to improve the purity of waste sand recovery, for example, Figure 2 , Figure 3 , Figure 5 , Figure 7 , Figure 8 As shown, the present invention also includes that the magnetic separation structure includes a conical drum 3 which is larger at the top and smaller at the bottom, the rotating shaft 2 passes through the axis of the conical drum 3 and is slidably connected to the conical drum 3, the upper edge of the conical drum 3 is rotatably connected with a mounting ring 4, an arc-shaped magnetic attraction plate 5 is provided below the conical drum 3, the arc-shaped magnetic attraction plate 5 is fixedly connected to the inner wall of the tank body 1 through a connecting rod 6, and a discharge port 7 is provided through the inner bottom of the conical drum 3.

[0036] When in use, the waste sand is transported to the conical drum 3 at the bottom of the tank body 1 by means of the feeding mechanism, and the waste sand falls into the conical drum 3. At this time, the arc-shaped magnetic suction plate 5 fixed on the outside of the conical drum 3 begins to absorb the magnetically affinitive materials in the waste sand. The magnetically affinitive materials are adsorbed on the inner wall of the conical drum 3, while the non-magnetically affinitive materials are discharged and fall from the discharge port 7 at the bottom of the inner side of the conical drum 3, thereby realizing the preliminary separation of the magnetically affinitive materials and the non-magneticly affinitive materials, and effectively improving the purity of the recovered waste sand;

[0037] When the feeding mechanism increases the conveying amount of waste sand, the weight of the waste sand increases and drives the conical drum 3 to move downward. During the downward movement of the conical drum 3, the transmission structure at the bottom thereof is triggered, thereby driving the conical drum 3 to rotate. When the conical drum 3 rotates to a certain position, the magnetically-affinity materials adsorbed on the conical drum 3 are discharged through the discharge port 7, thereby ensuring that the magnetically-affinity materials in the waste sand are adsorbed and processed, so that the contact between the magnetically-affinity materials and the arc-shaped magnetic absorption plate 5 is more sufficient, further enhancing the adsorption effect of the magnetically-affinity materials and improving the separation efficiency.

[0038] It should be pointed out that in the initial state of the conical drum 3 described in the present invention, the distance between the arc-shaped magnetic attraction plate 5 and the conical drum 3 is relatively large. At this time, the arc-shaped magnetic attraction plate 5 generates a relatively small magnetic attraction force, but can meet a smaller amount of materials; when the conveying amount of waste sand is increased, the increase in the weight of the waste sand drives the conical drum 3 to move downward. At this time, the distance between the conical drum 3 and the arc-shaped magnetic attraction plate 5 is reduced, thereby increasing the adsorption force of the arc-shaped magnetic attraction plate 5 and improving the magnetic separation efficiency of the waste sand.

[0039] In order to ensure the stability of the conical drum 3, for example, Figure 2 , Figure 3 , Figure 4 , Figure 5 As shown, the present invention also includes that the feeding mechanism is connected to a side close to the tank body 1 with a plurality of groups of obliquely arranged connecting pipes 8, and the plurality of connecting pipes 8 are respectively located above the corresponding conical rotating drums 3, and the lower surface of the mounting ring 4 is circumferentially distributed with a plurality of groups of supporting structures, and the supporting structure includes a sliding tube 9, and a vertically arranged sliding rod 10 is provided in the sliding tube 9, and the sliding rod 10 is fixedly connected to the inner wall of the sliding tube 9 through a spring 11, and the outer side of the sliding tube 9 is fixedly connected to the inner wall of the tank body 1 through a connecting piece, and the upper end of the sliding rod 10 is fixedly connected to the mounting ring 4.

[0040] When in use, the waste sand is transported to the conical drum 3 at the bottom of the tank body 1 by means of the connecting pipe 8, and the magnetically affinitive materials in the waste sand are adsorbed and separated by the magnetic attraction force generated by the arc-shaped magnetic attraction plate 5, so that the magnetically affinitive materials are adsorbed on the inner wall of the conical drum 3, thereby ensuring the treatment effect of the waste sand; when the amount of waste sand transported by the connection is increased, the amount of waste sand entering the conical drum 3 at the bottom of the tank body 1 is increased, and the weight of the waste sand is used to drive the conical drum 3 to move downward, and when the conical drum 3 moves downward, it drives the mounting ring 4 and the slide rod 10 to move downward. When the conical drum 3 moves downward to a certain position, the transmission structure drives the conical drum 3 to rotate, so that the contact between the magnetically affinitive materials and the arc-shaped magnetic attraction plate 5 is more complete, thereby further enhancing the adsorption effect of the magnetically affinitive materials;

[0041] When the conical drum 3 moves downward due to the weight of waste sand or vibrates during rotation, the slide rod 10 can slide up and down in the slide tube 9, and the spring 11 plays a role of buffering and resetting, so that the conical drum 3 always remains stable during operation, avoiding the adsorption and separation effect of the magnetically affinity material being affected by shaking or displacement.

[0042] For example, Figure 2 , Figure 3 , Figure 6 , Figure 7 , Figure 8 As shown, the present invention also includes that the discharging structure includes a first discharging cylinder 12 and a second discharging cylinder 13 arranged in an arc shape, and the upper surfaces of the first discharging cylinder 12 and the second discharging cylinder 13 are both provided with an arc groove 14, and the first discharging cylinder 12 is located below the arc magnetic attraction plate 5, and the outer sides of the first discharging cylinder 12 and the second discharging cylinder 13 are fixedly connected to the inner wall of the tank body 1 through a support rod 15;

[0043] The bottom of the first discharge barrel 12 is connected to a first discharge pipe 16 which is arranged obliquely, and a first discharge pipe 17 which is arranged vertically is provided on the outside of the tank body 1. One end of the first discharge pipe 16 passes through the tank body 1 and is connected to the inside of the first discharge pipe 17. The bottom of the second discharge barrel 13 is connected to a second discharge pipe 18 which is arranged obliquely, and a second discharge pipe 19 which is arranged vertically is provided on the outside of the tank body 1. One end of the second discharge pipe 18 passes through the tank body 1 and is connected to the inside of the second discharge pipe 19.

[0044] When in use, when waste sand falls into the rotating conical drum 3, the magnetically affinitive materials in the waste sand are adsorbed on the inner wall of the conical drum 3 by the arc-shaped magnetic suction plate, and the non-magnetically affinitive materials fall directly into the first discharge drum 12 under the action of gravity. The first discharge drum 12 is convenient for collecting the non-magnetically affinitive materials through the arc-shaped slot 14, and the first discharge pipe 16 flows into the first discharge pipe 17 vertically arranged outside the tank body 1. A collection container can be placed under the first discharge pipe 17 to collect the non-magneticly affinitive materials that have completed magnetic separation;

[0045] When the conical drum 3 rotates to a certain position by means of the transmission structure, the magnetically affinitive materials adsorbed on the conical drum 3 are separated from the arc-shaped magnetic attraction plate 5, and then the magnetically affinitive materials fall down from the conical drum 3, are discharged through the discharge port 7, and fall into the second discharge drum 13. At the same time, the separated magnetically affinitive materials are discharged through the second discharge pipe 18 and the second discharge pipe 19. A corresponding collection container is placed under the second discharge pipe 19 to collect the separated magnetically affinitive materials.

[0046] In order to facilitate the rotation of the conical drum 3, for example, Figure 2 , Figure 3 , Figure 8 As shown, the present invention also includes that the transmission structure includes a plurality of groups of rotating seats 20 fixedly connected to the rotating shaft 2, the rotating seat 20 is located above the discharging structure, the upper surface of the rotating seat 20 is provided with a polygonal groove 21, the upper surface of the tank body 1 is fixedly connected to a driving motor 22, and the output end of the driving motor 22 is fixedly connected to the upper end of the rotating shaft 2; the transmission structure also includes a polygonal block 23 fixedly connected to the lower surface of the conical drum 3, and the block 23 is engaged with the groove 21 after the conical drum 3 moves downward.

[0047] During use, when the feed amount of waste sand increases, the weight of the waste sand drives the conical drum 3 to move downward. During the downward movement of the conical drum 3, the block 23 at its bottom engages with the slot 21 on the rotating seat 20, and the driving motor 22 drives the rotating shaft 2 to rotate. The rotation of the rotating shaft 2 drives the conical drum 3 to rotate. When the conical drum 3 rotates, the magnetically affinitive materials in the waste sand are more fully contacted with the arc-shaped magnetic suction plate, thereby improving the separation efficiency of the magnetically affinitive materials in the waste sand.

[0048] In order to further ensure the treatment effect of waste sand, for example, Figure 4 , Figure 5 As shown, the present invention also includes that the end of the connecting pipe 8 away from the feeding pipe 29 is provided with a material discharge adjustment structure, and the material discharge adjustment structure includes a baffle 24 fixedly arranged above the feeding pipe 29, and the upper end of the baffle 24 is fixedly connected to a horizontally arranged cross plate 25, and the cross plate 25 is fixedly connected to the lower end of the slide rod 10.

[0049] During use, when the conical drum 3 moves downward, it drives the slide bar 10 downward, and the slide bar 10 is connected to the baffle 24, which in turn drives the baffle 24 downward. After the baffle 24 moves downward, the discharge amount of a group of connecting pipes 8 located below is reduced to adapt to the change in the amount of waste sand input, thereby avoiding blockage or untimely treatment in subsequent separation and discharge links due to excessive sand input, and further ensuring the treatment effect of the waste sand.

[0050] For example, Figure 1As shown, the present invention also includes that the screening device includes a feed hopper 26 opening upward, the lower part of the feed hopper 26 is connected to an electric screening machine 27, and one side of the electric screening machine 27 is connected to a collection box 28 through a pipeline.

[0051] When in use, the feed funnel 26 with its opening upward is used to conveniently dump the waste sand generated by the casting process, thereby improving the convenience and efficiency of feeding. The feed funnel 26 is connected to the electric screening machine 27, so that the waste sand can directly enter the screening link. The electric screening machine 27 uses vibration, screens and other methods to accurately perform preliminary screening of the waste sand, effectively separate large particles of impurities, and provide more satisfactory raw materials for subsequent processes such as magnetic separation. At the same time, the screened waste sand enters the aggregate box 28 through a pipeline. When the waste sand in the aggregate box 28 reaches a certain amount, the feeding mechanism can be started to transport the waste sand to the next processing link.

[0052] For example, Figure 1 , Figure 2 , Figure 4 As shown, the present invention also includes that the feeding mechanism includes a vertically arranged feeding pipe 29 , an electric spiral feeding shaft 30 is arranged in the feeding pipe 29 , and the lower end of the feeding pipe 29 is connected to the inside of the collecting box 28 .

[0053] When in use, when the waste sand in the collection box 28 reaches a certain amount, the electric screw feeding shaft 30 is used to transport the material in the collection box 28 to the feeding pipe 29. When the material moves up to a certain position, the material enters the tank body 1 through the connecting pipe 8 and falls into the conical drum 3 located at the bottom of the tank body 1, and is magnetically separated by the conical drum 3.

[0054] When the conveying efficiency of the electric screw feeding shaft 30 is improved, one group of conical drums 3 cannot meet the separation requirements, and the discharge efficiency of the connecting pipe 8 located below is insufficient. Part of the material continues to move upward and enters another group of conical drums 3 through another group of feeding pipes 29 above, so as to automatically adjust the waste sand processing efficiency according to the feed amount of waste sand, avoid high energy consumption operation, and reduce unnecessary wear of the equipment.

[0055] For example, Figure 1 As shown, the present invention also includes that the bottom of the tank body 1 is fixedly connected with support legs 31 , and reinforcement members 32 are fixedly connected between a plurality of groups of the support legs 31 .

[0056] When in use, the overall stability of the tank body 1 can be ensured by relying on the supporting legs 31 and the reinforcing members 32 .

[0057] When the present invention is used, the waste sand generated by the casting process is poured into the feed funnel 26 with an upward opening, and the waste sand enters the electric screening machine 27 connected to the feed funnel 26. The electric screening machine 27 uses vibration, screens, etc. to perform preliminary screening on the waste sand to separate large particles of impurities. The waste sand after preliminary screening enters the collection box 28 through a pipeline;

[0058] When the waste sand in the collecting box 28 reaches a certain amount, the feeding mechanism is started, and the electric screw feeding shaft 30 in the feeding mechanism conveys the waste sand in the collecting box 28 to the feeding pipe 29. As the waste sand moves upward, after reaching a certain position, the waste sand enters the tank body 1 through the obliquely arranged connecting pipe 8 connected to the feeding mechanism near the side of the tank body 1, and falls on the conical rotating drum 3 located at the bottom of the tank body 1.

[0059] When the waste sand falls into the lowermost conical drum 3, the arc-shaped magnetic suction plate 5 fixed on the outer side of the conical drum 3 begins to absorb the magnetically affinitive materials in the waste sand. The magnetically affinitive materials are absorbed on the inner wall of the conical drum 3, while the non-magnetically affinitive materials are discharged from the discharge port 7 at the inner bottom of the conical drum 3 and fall into the first discharge drum 12 arranged in an arc shape. The upper surface of the first discharge drum 12 is provided with an arc-shaped slot 14 for facilitating the collection of the non-magnetically affinitive materials. The non-magnetically affinitive materials flow into the first discharge pipe 17 vertically arranged on the outer side of the tank body 1 through the first discharge pipe 16 obliquely arranged at the bottom of the first discharge drum 12. A collecting container is placed under the first discharge pipe 17 to collect the non-magnetically affinitive materials that have been magnetically separated. These non-magnetically affinitive materials can be used as the molding sand required for casting and directly used in production;

[0060] When the feeding mechanism increases the conveying amount of waste sand, the weight of the waste sand increases, driving the lowest conical drum 3 to move downward. When the conical drum 3 moves downward, the distance between the conical drum 3 and the arc-shaped magnetic suction plate 5 decreases, thereby increasing the adsorption force of the arc-shaped magnetic suction plate 5 and improving the magnetic separation efficiency of the waste sand.

[0061] During the downward movement of the conical drum 3, the block 23 at the bottom thereof is correspondingly engaged with the slot 21 of the rotating seat 20 on the rotating shaft 2, and the driving motor 22 drives the rotating shaft 2 to rotate, thereby driving the conical drum 3 to rotate. When the conical drum 3 rotates to a certain position, the magnetic affinity material adsorbed on the conical drum 3 is separated from the arc-shaped magnetic attraction plate 5, and the magnetic affinity material falls from the conical drum 3, is discharged through the discharge port 7, and falls into the second discharge drum 13, and at the same time, is discharged by the second discharge pipe 18 and the second discharge pipe 19. A corresponding collection container is placed under the second discharge pipe 19 to collect the separated magnetic affinity material. The rotation of the conical drum 3 makes the magnetic affinity material contact with the arc-shaped magnetic attraction plate 5 more fully, thereby enhancing the adsorption effect of the magnetic affinity material and improving the processing efficiency.

[0062] When the feeding mechanism further increases the conveying capacity of waste sand, the lowest conical drum 3 cannot meet the processing requirements, and part of the material will enter another group of conical drums 3 through another group of connecting pipes 8. Relying on the weight of the waste sand, the group of conical drums 3 is driven to move downward. At the same time, its bottom clamping block 23 is engaged with the clamping groove 21 of the rotating seat 20, driving the conical drum 3 to rotate, thereby improving the processing efficiency; at the same time, the downward movement of the conical drum 3 drives the mounting ring 4 and the sliding rod 10 to move downward. The sliding rod 10 is connected to the baffle 24, thereby driving the baffle 24 to move downward, reducing the discharge amount of the group of connecting pipes 8 located below, so as to adapt to the changes in the waste sand feed amount, to adapt to the changes in the waste sand feed amount, to avoid blockage or untimely processing in the subsequent separation and discharging links due to excessive sand feed, and to further ensure the treatment effect of the waste sand.

[0063] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of the present invention is defined by the attached claims and their equivalents.

Claims

1. A waste sand recovery device for casting processing, characterized in that: The invention comprises a screening device for screening waste sand and a feeding mechanism for conveying foundry sand that has passed the screening. A tank body (1) connected to the feeding mechanism is vertically arranged on one side of the screening device. A vertically arranged rotating shaft (2) is rotatably connected inside the tank body (1). A plurality of groups of magnetic separation structures are slidably connected to the rotating shaft (2) from bottom to top. A discharging structure is arranged below each group of the magnetic separation structures. A transmission structure that automatically switches the transmission effect with the rotating shaft (2) is arranged at the bottom of the magnetic separation structure.

2. A waste sand recovery device for casting processing according to claim 1, characterized in that: The magnetic separation structure comprises a conical drum (3) which is larger at the top and smaller at the bottom. The rotating shaft (2) passes through the axis of the conical drum (3) and is slidably connected to the conical drum (3). The upper edge of the conical drum (3) is rotatably connected to a mounting ring (4). An arc-shaped magnetic attraction plate (5) is provided below the conical drum (3). The arc-shaped magnetic attraction plate (5) is fixedly connected to the inner wall of the tank body (1) through a connecting rod (6). The inner bottom of the conical drum (3) is provided with a plurality of groups of discharge ports (7) which are arranged through the conical drum.

3. A waste sand recovery device for casting processing according to claim 2, characterized in that: The feeding mechanism is connected to a side of the tank body (1) with a plurality of groups of obliquely arranged connecting pipes (8), and the plurality of groups of connecting pipes (8) are respectively located above the corresponding conical rotating drums (3). The lower surface of the mounting ring (4) is circumferentially distributed with a plurality of groups of supporting structures, and the supporting structure comprises a sliding tube (9), and a vertically arranged sliding rod (10) is arranged inside the sliding tube (9). The sliding rod (10) is fixedly connected to the inner wall of the sliding tube (9) through a spring (11), and the outer side of the sliding tube (9) is fixedly connected to the inner wall of the tank body (1) through a connecting piece, and the upper end of the sliding rod (10) is fixedly connected to the mounting ring (4).

4. A waste sand recovery device for casting processing according to claim 3, characterized in that: The discharging structure comprises a first discharging cylinder (12) and a second discharging cylinder (13) which are arranged in an arc shape, and the upper surfaces of the first discharging cylinder (12) and the second discharging cylinder (13) are both provided with an arc-shaped slot (14), and the first discharging cylinder (12) is located below the arc-shaped magnetic attraction plate (5), and the outer sides of the first discharging cylinder (12) and the second discharging cylinder (13) are both fixedly connected to the inner wall of the tank body (1) through a support rod (15); The bottom of the first discharge barrel (12) is connected to a first discharge pipe (16) which is arranged obliquely, and a first discharge pipe (17) which is arranged vertically is arranged on the outside of the tank body (1), and one end of the first discharge pipe (16) passes through the tank body (1) and is connected to the inside of the first discharge pipe (17); the bottom of the second discharge barrel (13) is connected to a second discharge pipe (18) which is arranged obliquely, and a second discharge pipe (19) which is arranged vertically is arranged on the outside of the tank body (1), and one end of the second discharge pipe (18) passes through the tank body (1) and is connected to the inside of the second discharge pipe (19).

5. A waste sand recovery device for casting processing according to claim 4, characterized in that: The transmission structure comprises a plurality of groups of rotating seats (20) fixedly connected to the rotating shaft (2), the rotating seats (20) being located above the discharging structure, the upper surface of the rotating seats (20) being provided with a polygonal clamping groove (21), the upper surface of the tank body (1) being fixedly connected to a driving motor (22), the output end of the driving motor (22) being fixedly connected to the upper end of the rotating shaft (2); the transmission structure further comprises a polygonal clamping block (23) fixedly connected to the lower surface of the conical rotating drum (3), the clamping block (23) being clamped with the clamping groove (21) after the conical rotating drum (3) moves downward.

6. A waste sand recovery device for casting processing according to claim 5, characterized in that: A material discharge adjustment structure is provided at one end of the connecting pipe (8) away from the feeding pipe (29), and the material discharge adjustment structure includes a baffle (24) fixedly arranged above the feeding pipe (29), and the upper end of the baffle (24) is fixedly connected to a horizontally arranged cross plate (25), and the cross plate (25) is fixedly connected to the lower end of the slide rod (10).

7. A waste sand recovery device for casting processing according to claim 6, characterized in that: The screening device comprises a feeding funnel (26) opening upward, the lower part of the feeding funnel (26) is connected to an electric screening machine (27), and one side of the electric screening machine (27) is connected to a collecting box (28) through a pipeline.

8. The waste sand recovery device for casting processing according to claim 7, characterized in that: The feeding mechanism comprises a vertically arranged feeding pipe (29), an electric screw feeding shaft (30) is arranged inside the feeding pipe (29), and the lower end of the feeding pipe (29) is communicated with the inside of the collecting box (28).

9. A waste sand recovery device for casting processing according to claim 8, characterized in that: The bottom of the tank body (1) is fixedly connected with a support leg (31), and a plurality of groups of the support legs (31) are fixedly connected with a reinforcement member (32).

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