An integrated device for screening, magnetic separation, cleaning and weighing of foundry sand

Abstract

The present invention provides an integrated device for screening, magnetic separation, cleaning and weighing of foundry sand, and relates to the technical field of foundry sand processing devices. The integrated device for screening, magnetic separation, cleaning and weighing of foundry sand comprises a bracket and a conveyor belt, wherein the conveyor belt is arranged inside the bracket, a screening machine is fixedly connected to one side of the top of the bracket, a magnetic suction platform is arranged inside the bracket, an electromagnet is fixedly connected inside the magnetic suction platform, a fixed frame is fixedly connected to the outside of the magnetic suction platform, and support shafts are fixedly connected to both sides of the fixed frame, a screw rod is arranged inside the bracket, a moving seat is threadedly connected to the outside of the screw rod, a moving rod is fixedly connected to the top of the moving seat, a guide rod is fixedly connected to the bottom of one side of the fixed frame, and the guide rod passes through the moving rod and is slidably connected to the moving rod. The integrated device for screening, magnetic separation, cleaning and weighing of foundry sand is convenient for sorting, automatic unloading, and subsequent unloading is convenient, without manual transmission, thereby improving work efficiency.

Description

Technical Field

[0001] The invention relates to a processing device, in particular to a foundry sand screening, magnetic separation, cleaning and weighing integrated device, belonging to the technical field of foundry sand processing devices. Background Art

[0002] The foundry industry is a basic industry in the manufacturing industry, and the development of various industries is inseparable from castings. From automobiles, machine tools, agricultural machinery, metallurgical mining equipment to aviation, aerospace, defense industries, and even construction hardware, household appliances and other industries, a large number of castings are needed every year. The foundry industry is a resource-intensive industry, consuming a large amount of energy and various raw and auxiliary materials every year. Foundry sand is one of the auxiliary materials with a large consumption. When sand casting is carried out, it is necessary to use foundry sand to make sand molds and sand cores, and it becomes old sand after pouring. If these old sands are recycled and reused, the casting cost can be greatly reduced and the amount of foundry sand can be reduced. Foundry sand, also known as Baozhu sand, fused ceramsite sand, and bauxite ceramsite sand. Foundry sand is made of high-quality bauxite as raw material, and is made through calcination, electric melting, granulation, screening and other ceramsite sand processes.

[0003] Under high temperature, most of the foundry sand breaks up into fine sand particles, but some of it is still in block shape. Most of the waste sand is attached with invalid or unexpired binders and cannot be directly used for secondary molding. If it cannot be effectively recycled, the molding sand can only be used once, and a large amount of industrial waste is discarded every year, causing waste of resources and environmental pollution. Magnetic separation devices are usually installed in recycling systems. The current magnetic separation devices are usually in the form of conveyor belts and long-plate magnetic blocks. The magnetic impurities in the molding sand have a great adverse effect on the casting operation and product quality. After magnetic separation, the magnetic impurities need to be recovered manually. However, manual recovery requires high human resource consumption, high labor intensity for workers, and a long time, which needs to be improved. Summary of the invention

[0004] 1. Technical issues to be resolved

[0005] The purpose of the present invention is to provide an integrated device for screening, magnetic separation, cleaning and weighing of foundry sand in order to solve the above-mentioned problems, so as to solve the problem that the magnetic separation device in the prior art is usually in the form of a conveyor belt and a long plate magnetic suction block, and the magnetic impurities in the molding sand have a great adverse effect on the casting operation and product quality. After magnetic separation, the magnetic impurities need to be recovered manually, but the manual recovery requires high human resource consumption, high labor intensity for workers, and a long time consumption.

[0006] (II) Technical solution

[0007] To achieve the above objectives, the present invention is implemented through the following technical solutions: a foundry sand screening, magnetic separation, cleaning, weighing integrated device, including a bracket and a conveyor belt, the conveyor belt is arranged inside the bracket, a screening machine is fixedly connected to one side of the top of the bracket, the screening machine is arranged on the top of the conveyor belt, a magnetic suction platform is arranged inside the bracket, an electromagnet is fixedly connected inside the magnetic suction platform, a fixed frame is fixedly connected to the outside of the magnetic suction platform, support shafts are fixedly connected on both sides of the fixed frame, and the two support shafts are rotatably connected to the bracket, a screw rod is arranged inside the bracket, a moving seat is threadedly connected to the outside of the screw rod, a moving rod is fixedly connected to the top of the moving seat, a guide rod is fixedly connected to the bottom of one side of the fixed frame, and the guide rod passes through the moving rod and is slidably connected to the moving rod.

[0008] Preferably, two fixing blocks are fixedly connected to the bottom end of the bracket, and both ends of the screw rod respectively pass through the two fixing blocks and are rotatably connected to the two fixing blocks, which is beneficial to supporting the screw rod.

[0009] Preferably, a limiting rod is fixedly connected between the two fixed blocks, and the limiting rod passes through the moving seat and is slidably connected to the moving seat, which is beneficial to limiting the moving seat and improving the stability of the moving seat.

[0010] Preferably, the bracket is provided with a first conveyor belt and a second conveyor belt, and the first conveyor belt and the second conveyor belt are respectively provided on both sides of the magnetic suction platform, which is beneficial to the transmission of the weighed casting sand and facilitates sorting. The first conveyor belt is provided with two first transmission rollers, and the first transmission rollers are rotatably connected to the bracket. The first conveyor belt is sleeved on the outside of the first transmission roller, so that the first transmission roller rotates to drive the first conveyor belt for transmission. The second conveyor belt is provided with two second transmission rollers, and the two second transmission rollers are rotatably connected to the bracket, which is beneficial to the transmission of the second conveyor belt.

[0011] Preferably, a fixing sleeve is fixedly connected to both sides of the bracket, a rotating rod is rotatably connected to the inside of the fixing sleeve, a first bevel gear is fixedly connected to the bottom end of the rotating rod and the outside of the screw rod, the two first bevel gears are meshed and connected, and the first bevel gears are driven to rotate by the rotation of the screw rod.

[0012] Preferably, the top ends of the two rotating rods are fixedly connected with a second bevel gear, the outer sides of one of the first transmission roller and the second transmission roller are fixedly connected with a one-way bearing, and the outer side of the one-way bearing is fixedly connected with a third bevel gear for easy transmission.

[0013] Preferably, a forward and reverse motor is fixedly connected inside the bracket, the output end of the forward and reverse motor is fixedly connected to the screw rod, and the forward and reverse motor and the magnetic suction platform are both controlled by a computer for easy control.

[0014] Preferably, electronic scales are fixedly connected to both sides of the bracket, and the two electronic scales are respectively arranged on one side of the bottom of the first conveyor belt and the second conveyor belt to facilitate weighing.

[0015] Preferably, a cleaning device and a drying device are arranged above the first conveyor belt and the second conveyor belt, the cleaning device comprises a water pump, a water pipe and a plurality of nozzles, one end of the water pipe is connected to the water pump, and the other end is connected to the plurality of nozzles, the nozzles are used to spray water to clean the materials on the first conveyor belt and the second conveyor belt; the drying device is an electric heating tube or a resistance wire; water-permeable holes are opened on the surfaces of the first conveyor belt and the second conveyor belt, the aperture of the water-permeable holes is smaller than the size of the casting sand, and a water-absorbing layer is arranged on the inner surface of the first conveyor belt and the second conveyor belt, the water-absorbing layer is closely attached to the inner surface of the first conveyor belt and the second conveyor belt, and a sponge block is also arranged inside the first conveyor belt and the second conveyor belt; the water sprayed by the nozzle cleans the casting sand, and then the water enters the inside of the first conveyor belt and the second conveyor belt through the water-permeable holes on the first conveyor belt and the second conveyor belt, and then is absorbed by the water-absorbing layer on the inner surface of the first conveyor belt and the second conveyor belt and the sponge block inside the first conveyor belt and the second conveyor belt, so as to cooperate with the drying device to dry the casting sand, and also prevent water from flowing into the motor and the electronic scale below to cause damage. A level detector is arranged on the outer surface of the fixing frame, and the level detector is used to detect the level of the fixing frame. The level detector is electrically connected to the forward and reverse motors, and both are controlled by a computer; when the fixing frame tilts to the left and right successively, and the two materials fall into two electronic scales for weighing and recovery, the forward and reverse motors control the rotation of the lead screw to restore the fixing frame to its initial state. In order to ensure that the bottom of the fixing frame is in a horizontal state, a level detector is arranged on the outer surface of the fixing frame, and the level detector is used to detect the level of the fixing frame. The staff can control the operation of the forward and reverse motors through the computer, thereby fine-tuning the level of the fixing frame to ensure that the fixing frame no longer tilts. The bottom of the fixed frame is hollow, and a plurality of balancing weight balls are arranged inside the bottom of the fixed frame. The balancing weight balls move freely inside the fixed frame and gather to the lower side as the fixed frame deflects. When the forward and reverse motors drive the fixed frame and the magnetic suction platform to deflect and tilt toward one side of the conveyor belt to dump materials, the fixed frame and the magnetic suction platform may shake, which may easily cause uneven distribution of casting sand or magnetic particles on the conveyor belt or even spill outside the conveyor belt. By arranging a plurality of balancing weight balls inside the bottom of the fixed frame, when the fixed frame and the magnetic suction platform deflect and tilt to one side, the balancing weight balls slide to the lower side inside the fixed frame and gather together, which helps to make the fixed frame and the magnetic suction platform more stable and reduce shaking, so that the casting sand and magnetic particles are evenly scattered on the first conveyor belt and the second conveyor belt respectively, avoiding the problem of spilling outside the conveyor belt.

[0016] Preferably, two L-shaped rods are symmetrically and detachably provided on the moving rod, and a brush is fixedly connected to the other end of the L-shaped rod, and the two brushes are respectively tightly arranged on the lower surfaces of the first conveyor belt and the second conveyor belt, and the brushes are detachably provided, and a casting sand collection box and a magnetic particle collection box are respectively provided under the brushes; after the first conveyor belt and the second conveyor belt have been working for a period of time, some casting sand and magnetic particles will remain on the surfaces of the first conveyor belt and the second conveyor belt, respectively, which are not easy to remove, and by symmetrically and detachably providing the two L-shaped rods on the moving rod, when the moving rod moves left or right on the screw rod along with the moving seat, the L-shaped rod moves together with the moving rod, and the brush arranged on the other end of the L-shaped rod will scrape the casting sand and magnetic particles remaining on the lower surfaces of the first conveyor belt and the second conveyor belt, and collect them into the casting sand collection box and the magnetic particle collection box, respectively, thereby maintaining the surface cleanliness of the first conveyor belt and the second conveyor belt.

[0017] Alternatively, two L-shaped rods are symmetrically and detachably arranged on the moving rod, and a group of air nozzles are fixedly connected to the other end of the L-shaped rod, and the air nozzles are connected to an external air source. The two groups of air nozzles are respectively close to the lower surfaces of the first conveyor belt and the second conveyor belt and are used to spray air to the lower surfaces of the first conveyor belt and the second conveyor belt, and the air nozzles are detachably arranged, and a casting sand collection box and a magnetic particle collection box are respectively arranged below the air nozzles; when the moving rod moves left or right on the screw rod along with the moving seat, the L-shaped rod moves together with the moving rod, and the air nozzles arranged on the other end of the L-shaped rod will spray air to the lower surfaces of the first conveyor belt and the second conveyor belt, and the high-pressure gas blows off the casting sand and magnetic particles remaining thereon, and collects them in the casting sand collection box and the magnetic particle collection box, respectively, so as to maintain the surface cleanliness of the first conveyor belt and the second conveyor belt.

[0018] Preferably, the electromagnet is configured as a plurality of spaced-apart strip electromagnets inside the magnetic suction platform, and the plurality of strip electromagnets can be individually controlled to be powered on and off, thereby adjusting the number of energized strip electromagnets; when the conveyor belt conveys the screened foundry sand and magnetic particles to the top of the magnetic suction platform for magnetic separation, if there are many magnetic particles in the foundry sand, since the magnetic particles are firmly adsorbed on the top of the magnetic suction platform by the electromagnet, even if the magnetic suction platform is tilted, the non-magnetic foundry sand may not all fall to the second conveyor belt due to the obstruction of the magnetic particles, which will cause the magnetic suction platform to tilt in the opposite direction after the electromagnet is powered off, and the remaining non-magnetic foundry sand will be mixed with the magnetic particles and all fall to the first conveyor belt, i.e., the magnetic separation effect is poor; by designing the electromagnet as a plurality of spaced-apart strip electromagnets When the magnet and the bar electromagnet perform magnetic separation on the foundry sand, the magnetic particles are attracted by the electromagnet and are distributed in rows on the top of the magnetic suction platform. In this way, when the magnetic suction platform is tilted to one side, the non-magnetic foundry sand will fall from the area between the multiple rows of magnetic particles to the second conveyor belt without being blocked by the magnetic particles. When the electromagnet is powered off, the magnetic suction platform is tilted in the opposite direction, and the magnetic particles slide to the first conveyor belt, which will no longer be mixed with non-magnetic foundry sand, and the magnetic separation effect is improved. In addition, since the power on and off of the multiple bar electromagnets can be controlled individually, the spacing between the rows of magnetic particles when the magnetic particles are adsorbed on the top of the magnetic suction platform can be changed by adjusting the number of energized bar electromagnets to adapt to the magnetic separation of foundry sand with different magnetic particle contents or different sand particle sizes.

[0019] The present invention provides an integrated device for screening, magnetic separation, cleaning and weighing of foundry sand, which has the following beneficial effects:

[0020] 1. The integrated device for screening, magnetic separation, cleaning and weighing of foundry sand screens the foundry sand through a screening machine, discharges the screened material to the top of the conveyor belt, enables the conveyor belt to transmit the foundry sand, and enables the foundry sand to fall on the top of the magnetic suction platform for sorting. The forward and reverse motors send signals to start the forward and reverse motors in a forward direction, and the forward and reverse motors drive the screw rod to rotate forward, so that the screw rod rotates to drive the moving seat to move, so that the moving seat drives the moving rod to move to the left, and the moving rod drives the guide rod to move, thereby deflecting the fixed frame, so that the top of the magnetic suction platform tilts toward the second conveyor belt, and the non-magnetic sand on the top of the magnetic suction platform slides to the top of the second conveyor belt. At the same time, the rotation of the screw rod drives the first bevel gear to rotate, the first bevel gear drives the rotating rod to rotate, and the rotating rod drives the second bevel gear to rotate, and the second bevel gear drives the third bevel gear to rotate, thereby driving the second transmission roller to rotate, so that the second transmission roller rotates to drive the second conveyor belt to move, thereby transporting the foundry sand on the top of the second conveyor belt backward, so that the foundry sand falls from the top of the second conveyor belt, which is convenient for automatic unloading and subsequent unloading.

[0021] 2. The foundry sand screening, magnetic separation, cleaning and weighing integrated device controls the forward and reverse motors to start in reverse, so that the forward and reverse motors drive the lead screw to reverse, so that the lead screw drives the moving seat to move in the opposite direction, so that the moving seat drives the moving rod and the guide rod to move, and the magnetic suction platform is deflected. The electromagnet is powered off by the PLC control, so that the lead screw drives another first bevel gear and the rotating rod to rotate, and finally drives the second bevel gear and the third bevel gear to rotate, so that it drives the first transmission roller to rotate, and the first transmission roller drives the first conveyor belt to move, so as to facilitate the recovery of magnetic particles with high recovery value. At the same time, the two materials fall into two electronic scales for weighing, which is convenient for recycling. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 is a side cross-sectional view of the present invention;

[0024] Figure 3 For the present invention Figure 2 A magnified view of the structure of part A;

[0025] Figure 4 is a schematic structural diagram of the third bevel gear of the present invention;

[0026] Figure 5 It is a top view schematic diagram of the magnetic attraction platform and the magnet of the present invention.

[0027] In the figure: 1. bracket; 2. conveyor belt; 3. support shaft; 4. fixed frame; 5. magnetic platform; 6. screw; 7. moving seat; 8. moving rod; 9. guide rod; 10. fixed block; 11. limit rod; 12. first conveyor belt; 13. second conveyor belt; 14. fixed sleeve; 15. rotating rod; 16. first bevel gear; 17. second bevel gear; 18. first transmission roller; 19. second transmission roller; 20. forward and reverse motor; 21. third bevel gear; 22. one-way bearing; 23. electromagnet; 24. electronic scale; 25. screening machine. DETAILED DESCRIPTION

[0028] The embodiment of the present invention provides a foundry sand screening, magnetic separation, cleaning and weighing integrated device.

[0029] See also Figure 1 , Figure 2 , Figure 3 and Figure 4, including a bracket 1 and a conveyor belt 2, the conveyor belt 2 is arranged inside the bracket 1, a screening machine 25 is fixedly connected to one side of the top of the bracket 1, the screening machine 25 is arranged on the top of the conveyor belt 2, a magnetic platform 5 is arranged inside the bracket 1, an electromagnet 23 is fixedly connected inside the magnetic platform 5, a fixing frame 4 is fixedly connected to the outside of the magnetic platform 5, support shafts 3 are fixedly connected on both sides of the fixing frame 4, and the two support shafts 3 are rotatably connected to the bracket 1, a screw rod 6 is arranged inside the bracket 1, a forward and reverse motor 20 is fixedly connected inside the bracket 1, the output end of the forward and reverse motor 20 is fixedly connected to the screw rod 6, and the forward and reverse motor 20 and the magnetic platform 5 are both controlled by a computer for easy control.

[0030] A moving seat 7 is threadedly connected to the outer side of the screw rod 6, and a moving rod 8 is fixedly connected to the top of the moving seat 7. A guide rod 9 is fixedly connected to the bottom of one side of the fixed frame 4. The guide rod 9 penetrates the moving rod 8 and is slidably connected to the moving rod 8. Two fixed blocks 10 are fixedly connected to the bottom end of the inside of the bracket 1. Both ends of the screw rod 6 respectively penetrate the two fixed blocks 10 and are rotatably connected to the two fixed blocks 10, which is beneficial to supporting the screw rod 6. A limiting rod 11 is fixedly connected between the two fixed blocks 10. The limiting rod 11 penetrates the moving seat 7 and is slidably connected to the moving seat 7, which is beneficial to limiting the moving seat 7 and improving the stability of the moving seat 7.

[0031] A first conveyor belt 12 and a second conveyor belt 13 are arranged inside the bracket 1. The first conveyor belt 12 and the second conveyor belt 13 are respectively arranged on both sides of the magnetic suction platform 5, which is conducive to the transmission of the weighed casting sand and is convenient for sorting. Two first transmission rollers 18 are arranged inside the first conveyor belt 12. The first transmission rollers 18 are rotatably connected to the bracket 1. The first conveyor belt 12 is sleeved on the outside of the first transmission roller 18, so that the first transmission roller 18 rotates to drive the first conveyor belt 12 for transmission. Two second transmission rollers 19 are arranged inside the second conveyor belt 13. The two second transmission rollers 19 are both rotatably connected to the bracket 1, which is conducive to the transmission of the second conveyor belt 13.

[0032] A fixed sleeve 14 is fixedly connected to both sides of the bracket 1, and a rotating rod 15 is rotatably connected to the inside of the fixed sleeve 14. A first bevel gear 16 is fixedly connected to the bottom end of the rotating rod 15 and the outside of the screw rod 6. The two first bevel gears 16 are meshingly connected, and the first bevel gear 16 is driven to rotate by the rotation of the screw rod 6. The tops of the two rotating rods 15 are fixedly connected to the second bevel gear 17, and one of the first transmission rollers 18 and the second transmission roller 19 is fixedly connected to the outside of a one-way bearing 22, and the outside of the one-way bearing 22 is fixedly connected to the third bevel gear 21 for easy transmission. Electronic scales 24 are fixedly connected to both sides of the bracket 1, and the two electronic scales 24 are respectively arranged on one side of the bottom of the first conveyor belt 12 and the second conveyor belt 13 for easy weighing.

[0033] In another embodiment, a cleaning device and a drying device are arranged above the first conveyor belt 12 and the second conveyor belt 13, the cleaning device comprises a water pump, a water pipe and a plurality of nozzles, one end of the water pipe is connected to the water pump, and the other end is connected to the plurality of nozzles, the nozzles are used to spray water to clean the materials on the first conveyor belt 12 and the second conveyor belt 13; the drying device is an electric heating tube or a resistance wire; the surface of the first conveyor belt 12 and the second conveyor belt 13 is provided with water-permeable holes, the aperture of the water-permeable holes is smaller than the size of the casting sand, and the inner surface of the first conveyor belt 12 and the second conveyor belt 13 is provided with a water-absorbing layer The water-absorbing layer is in close contact with the inner surfaces of the first conveyor belt 12 and the second conveyor belt 13, and sponge blocks are also arranged inside the first conveyor belt 12 and the second conveyor belt 13; a level detector is arranged on the outer surface of the fixed frame 4, and the level detector is used to detect the levelness of the fixed frame 4. The level detector is electrically connected to the forward and reverse motors 20, and both are controlled by a computer; the bottom of the fixed frame 4 is hollow, and a plurality of counterweight balls are arranged inside the bottom of the fixed frame 4. The counterweight balls move freely inside the fixed frame 4 and gather to the lower side as the fixed frame 4 deflects.

[0034] In another embodiment, two L-shaped rods are symmetrically and detachably provided on the moving rod 8, and a brush is fixedly connected to the other end of the L-shaped rod, and the two brushes are respectively tightly arranged on the lower surface of the first conveyor belt 12 and the second conveyor belt 13, and the brush is detachably provided, and a casting sand collection box and a magnetic particle collection box are respectively provided under the brush; after the first conveyor belt 12 and the second conveyor belt 13 have been working for a period of time, some casting sand and magnetic particles will remain on the surfaces of the first conveyor belt 12 and the second conveyor belt 13, respectively, which are not easy to remove, by symmetrically and detachably providing two L-shaped rods on the moving rod 8, when the moving rod 8 moves left or right on the screw rod with the moving seat, the L-shaped rod moves with the moving rod 8, and the brush arranged on the other end of the L-shaped rod will scrape off the casting sand and magnetic particles remaining on the lower surfaces of the first conveyor belt 12 and the second conveyor belt 13, and collect them into the casting sand collection box and the magnetic particle collection box, respectively, so as to maintain the surface cleanliness of the first conveyor belt 12 and the second conveyor belt 13.

[0035] In another embodiment, two L-shaped rods are symmetrically and detachably provided on the moving rod 8, and a group of air nozzles are fixedly connected to the other end of the L-shaped rod, and the air nozzles are connected to an external air source. The two groups of air nozzles are respectively close to the lower surfaces of the first conveyor belt 12 and the second conveyor belt 13 and are used to spray air to the lower surfaces of the first conveyor belt 12 and the second conveyor belt 13, and the air nozzles are detachably provided, and a casting sand collection box and a magnetic particle collection box are respectively provided below the air nozzles; when the moving rod 8 moves left or right on the screw rod along with the moving seat, the L-shaped rod moves together with the moving rod 8, and the air nozzles provided on the other end of the L-shaped rod will spray air to the lower surfaces of the first conveyor belt 12 and the second conveyor belt 13, and the high-pressure gas blows off the casting sand and magnetic particles remaining thereon, and collects them in the casting sand collection box and the magnetic particle collection box, respectively, so as to maintain the surface cleanliness of the first conveyor belt 12 and the second conveyor belt 13.

[0036] In another embodiment, the electromagnet 23 is configured as a plurality of spaced-apart strip electromagnets 23 inside the magnetic suction platform 5, and the plurality of strip electromagnets 23 can be individually controlled to be powered on and off, thereby adjusting the number of energized strip electromagnets 23; when the conveyor belt conveys the screened foundry sand and magnetic particles to the top of the magnetic suction platform 5 for magnetic separation, if there are many magnetic particles in the foundry sand, since the magnetic particles are firmly adsorbed on the top of the magnetic suction platform 5 by the electromagnet 23, even if the magnetic suction platform 5 is tilted, due to the obstruction of the magnetic particles, the non-magnetic foundry sand may not all fall to the second conveyor belt 13, which will cause the magnetic suction platform 5 to tilt in the opposite direction after the electromagnet 23 is powered off, and the remaining non-magnetic foundry sand will be mixed with the magnetic particles and all fall to the first conveyor belt 12, that is, the magnetic separation effect is poor; by designing the electromagnet 23 as a plurality of spaced-apart strip electromagnets 23 The bar electromagnet 23, when the bar electromagnet 23 performs magnetic separation on the foundry sand, the magnetic particles are attracted by the electromagnet 23 and are spaced in rows on the top of the magnetic suction platform 5. In this way, when the magnetic suction platform 5 is tilted to one side, the non-magnetic foundry sand will fall from the area between the multiple rows of magnetic particles to the second conveyor belt 13 without being blocked by the magnetic particles. When the electromagnet 23 is powered off, the magnetic suction platform 5 is tilted in the opposite direction, and the magnetic particles slide to the first conveyor belt 12, in which the non-magnetic foundry sand will no longer be mixed, and the magnetic separation effect is improved. In addition, since the power on and off of the multiple bar electromagnets 23 can be controlled individually, the spacing between the rows of magnetic particles when the magnetic particles are adsorbed on the top of the magnetic suction platform 5 can be changed by adjusting the number of energized bar electromagnets 23, so as to adapt to the magnetic separation of foundry sands with different magnetic particle contents or different sand particle sizes.

[0037] Specifically, the foundry sand is screened by the screening machine 25, and the screened material is discharged to the top of the conveyor belt 2, so that the conveyor belt 2 transmits the foundry sand, and the foundry sand falls on the top of the magnetic suction platform 5 for sorting, and the forward and reverse motor 20 sends a signal to start the forward and reverse motor 20 in the forward direction, and the forward and reverse motor 20 drives the screw rod 6 to rotate in the forward direction, so that the screw rod 6 rotates to drive the moving seat 7 to move, so that the moving seat 7 drives the moving rod 8 to move to the left, and the moving rod 8 drives the guide rod 9 to move, so that the fixed frame 4 is deflected, so that the top of the magnetic suction platform 5 is tilted toward the second conveyor belt 13, and the magnetic The non-magnetic sand on the top of the suction platform 5 slides to the top of the second conveyor belt 13. At the same time, the screw 6 rotates to drive the first bevel gear 16 to rotate, and the first bevel gear 16 drives the rotating rod 15 to rotate, and the rotating rod 15 drives the second bevel gear 17 to rotate, and the second bevel gear 17 drives the third bevel gear 21 to rotate, thereby driving the second transmission roller 19 to rotate, and the second transmission roller 19 rotates to drive the second conveyor belt 13 to move, thereby transporting the casting sand on the top of the second conveyor belt 13 backward, and making the casting sand fall from the top of the second conveyor belt 13, which is convenient for automatic unloading and subsequent unloading.

[0038] The forward and reverse motor 20 is controlled to start in reverse, so that the forward and reverse motor 20 drives the lead screw 6 to reverse, so that the lead screw 6 drives the moving seat 7 to move in the opposite direction, so that the moving seat 7 drives the moving rod 8 and the guide rod 9 to move, so that the magnetic suction platform 5 is deflected, and the electromagnet 23 is controlled to be powered off through the PLC, so that the lead screw 6 drives another first bevel gear 16 and the rotating rod 15 to rotate, and finally drives the second bevel gear 17 and the third bevel gear 21 to rotate, so that it drives the first transmission roller 18 to rotate, and the first transmission roller 18 drives the first conveyor belt 12 to move, so as to facilitate the recovery of magnetic particles with high recovery value. At the same time, the two materials fall into two electronic scales 24 for weighing, which is convenient for recycling.

[0039] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art 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 to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A foundry sand screening, magnetic separation, cleaning and weighing integrated device, comprising a support (1) and a conveyor belt (2), wherein the conveyor belt (2) is arranged inside the support (1), characterized in that: A screening machine (25) is fixedly connected to one side of the top of the support (1), and the screening machine (25) is arranged on the top of the conveyor belt (2). A magnetic platform (5) is arranged inside the support (1), and an electromagnet (23) is fixedly connected inside the magnetic platform (5). A fixed frame (4) is fixedly connected to the outside of the magnetic platform (5), and support shafts (3) are fixedly connected to both sides of the fixed frame (4). Both support shafts (3) are rotatably connected to the support (1). A screw rod (6) is arranged inside the support (1), and a movable seat (7) is threadedly connected to the outside of the screw rod (6). A movable rod (8) is fixedly connected to the top of the movable seat (7), and a guide rod (9) is fixedly connected to the bottom of one side of the fixed frame (4), and the guide rod (9) passes through the movable rod (8) and is slidably connected to the movable rod (8). The support (1) is provided with a first conveyor belt (12) and a second conveyor belt (13), the first conveyor belt (12) and the second conveyor belt (13) are respectively arranged on both sides of the magnetic suction platform (5), the first conveyor belt (12) is provided with two first transmission rollers (18), the first transmission rollers (18) are rotatably connected to the support (1), the first conveyor belt (12) is sleeved on the outside of the first transmission roller (18), the second conveyor belt (13) is provided with two second transmission rollers (19), both of the two second transmission rollers (19) are rotatably connected to the support (1); A forward and reverse motor (20) is fixedly connected inside the bracket (1); an output end of the forward and reverse motor (20) is fixedly connected to a screw rod (6); and both the forward and reverse motor (20) and the magnetic attraction platform (5) are controlled by a computer; A cleaning device and a drying device are arranged above the first conveyor belt (12) and the second conveyor belt (13), the cleaning device comprising a water pump, a water pipe and a plurality of nozzles, one end of the water pipe is connected to the water pump, and the other end is connected to the plurality of nozzles, the nozzles are used to spray water to clean the materials on the first conveyor belt (12) and the second conveyor belt (13); the drying device is an electric heating tube or a resistance wire; the first conveyor belt (12) and the second conveyor belt (13) are provided with water-permeable holes on their surfaces, the aperture of the water-permeable holes is smaller than the size of the casting sand, and a water-absorbing layer is arranged on the inner surface of the first conveyor belt (12) and the second conveyor belt (13), the water-absorbing layer is tightly The first conveyor belt (12) and the second conveyor belt (13) are attached to the inner surface, and the first conveyor belt (12) and the second conveyor belt (13) are also provided with a sponge block inside; a level detector is provided on the outer surface of the fixed frame (4), and the level detector is used to detect the levelness of the fixed frame (4); the level detector is electrically connected to the forward and reverse motors (20), and both are controlled by a computer; the bottom of the fixed frame (4) is hollow, and a plurality of counterweight balls are provided inside the bottom of the fixed frame (4), and the counterweight balls move freely inside the fixed frame (4) and gather to the lower side as the fixed frame (4) deflects.

2. The integrated device for screening, magnetic separation, cleaning and weighing of foundry sand according to claim 1, characterized in that: The bottom end of the interior of the bracket (1) is fixedly connected to two fixing blocks (10), and the two ends of the screw rod (6) respectively penetrate the two fixing blocks (10) and are rotatably connected to the two fixing blocks (10).

3. The integrated device for screening, magnetic separation, cleaning and weighing of foundry sand according to claim 2, characterized in that: A limiting rod (11) is fixedly connected between the two fixed blocks (10), and the limiting rod (11) passes through the movable seat (7) and is slidably connected to the movable seat (7).

4. The integrated device for screening, magnetic separation, cleaning and weighing of foundry sand according to claim 3, characterized in that: Both sides of the bracket (1) are fixedly connected to a fixing sleeve (14), a rotating rod (15) is rotatably connected to the inside of the fixing sleeve (14), a first bevel gear (16) is fixedly connected to the bottom end of the rotating rod (15) and the outside of the screw rod (6), and the two first bevel gears (16) are meshingly connected.

5. The integrated device for screening, magnetic separation, cleaning and weighing of foundry sand according to claim 4, characterized in that: The top ends of the two rotating rods (15) are fixedly connected to a second bevel gear (17), the outer sides of one of the first transmission roller (18) and the second transmission roller (19) are fixedly connected to a one-way bearing (22), and the outer sides of the one-way bearing (22) are fixedly connected to a third bevel gear (21).

6. The integrated device for screening, magnetic separation, cleaning and weighing of foundry sand according to claim 5, characterized in that: Electronic scales (24) are fixedly connected to both sides of the interior of the bracket (1), and the two electronic scales (24) are respectively arranged on one side of the bottom of the first conveyor belt (12) and the second conveyor belt (13).

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