A waste sand crushing and recycling device

Abstract

The present application relates to the field of waste sand treatment, and particularly relates to a waste sand crushing and recycling device, which comprises a base plate, a recycling bin, a shunt frame, a crushing bin, a crushing frame, a middle shaft, a crushing motor, a synchronous wheel, a synchronous belt and a supporting leg; the present application solves the problem that the traditional waste sand crushing and processing method is difficult to actively separate the waste sand with different sizes, and the repetitive operation is easy to occur in the crushing process, and the surrounding wrapping of small particle waste sand also reduces the self-decomposition rate and decomposition effect of large particle waste sand block, thereby reducing the efficiency of waste sand crushing and the overall smoothness of the waste sand crushing device during operation, and the problem that the waste sand in the stacking state is difficult to be actively turned over and decomposed and peeled off is solved, and the decomposition and crushing cycle of the waste sand is increased.

Description

Technical Field

[0001] This invention relates to the field of waste sand treatment, specifically a waste sand crushing and recycling device. Background Technology

[0002] Sand casting is a casting method that produces castings in sand molds. Steel, iron, and most non-ferrous alloy castings can be obtained using sand casting. Because the molding materials used in sand casting are inexpensive and readily available, and the mold manufacturing is simple, it is suitable for single-piece production, batch production, and mass production of castings, and has long been a fundamental process in casting production.

[0003] The basic raw materials for making sand molds are foundry sand and molding sand binders. The most commonly used foundry sand is silica sand. When the high-temperature performance of silica sand cannot meet the requirements, special sands such as zircon sand, chromite sand, and corundum sand are used. To ensure that the sand molds and cores have sufficient strength and do not deform or break during handling, assembly, and pouring of molten metal, molding sand binders are generally added during casting to bind the loose sand particles together. The most widely used molding sand binder is clay; various drying or semi-drying oils, water-soluble silicates or phosphates, and various synthetic resins can also be used as molding sand binders.

[0004] After sand casting is completed, the foundry sand needs to be peeled off from the surface of the casting. This peeled-off foundry sand is considered waste sand. Through crushing, screening, incineration, and cooling, the waste sand can be transformed into reusable "new sand." This regenerated "new sand" has lower loss on ignition, lower gas generation, and a lower coefficient of expansion, which can improve the casting yield and reduce the foundry's production costs. At the same time, the reuse of waste sand can significantly reduce the amount of new sand used, saving logistics costs. Furthermore, recycling waste sand can reduce the development of silica sand resources, significantly reduce foundry waste sand emissions, and mitigate pollution to soil, air, and water. However, the following problems often arise during the waste sand recycling and crushing process:

[0005] (1) During the process of waste sand crushing, the particle size of the waste sand is different. Traditional waste sand crushing methods are difficult to actively disperse and isolate waste sand of different sizes. This can easily cause repetitive operations during the crushing process. Furthermore, the surrounding and wrapping of small particles of waste sand also reduces the self-decomposition rate and decomposition effect of large particles of waste sand, thus reducing the efficiency of waste sand crushing and the overall smoothness of the waste sand crushing device during operation.

[0006] (2) During the waste sand crushing operation, it is difficult to actively turn over and decompose the waste sand in the pile state, which easily leads to incomplete decomposition of waste sand blocks and increases the decomposition and crushing cycle of waste sand. Summary of the Invention

[0007] This invention provides a waste sand crushing and recycling device to solve the technical problem that during the decomposition and crushing process of waste sand, the large volume of sand blocks is reduced by the external compression due to the encapsulation of fine sand particles, which in turn reduces the self-flow or turning ability of the waste sand in the pile state, easily leading to incomplete decomposition of waste sand and a longer crushing cycle.

[0008] The present invention adopts the following technical solution: a waste sand crushing and recycling device, comprising a base plate, a recycling bin, a diverter, a crushing bin, a crushing frame, a center shaft, a crushing motor, a synchronous pulley, a synchronous belt, and support feet. Support feet are evenly installed on the lower end of the base plate, and a recycling bin is fixedly installed in the middle of the upper end of the base plate. Both the upper and lower ends of the recycling bin are open structures. A diverter is fixedly installed on the upper inner side of the base plate. Crushing bins are symmetrically installed on the left and right sides of the middle of the recycling bin. Center shafts are installed at both the front and rear ends of the crushing bins by a rotating fit. A crushing frame is installed between the center shafts. A crushing motor is fixedly installed on the side wall of the recycling bin through a motor mount. Synchronous pulleys are fixedly installed on the output shaft of the crushing motor and the end of the center shaft, and the synchronous pulleys are connected by a synchronous belt drive.

[0009] The recycling bin has oscillating slide rods installed around its inner perimeter via a sliding fit. These slide rods are connected to the inner wall of the recycling bin via oscillating springs. An oscillating plate is installed at the upper end of each slide rod. The oscillating plate has downwardly extending trumpet-shaped crushing grooves evenly distributed in the middle. An oscillating shaft is fixedly installed at the lower part of the recycling bin via bearings. One end of the oscillating shaft is connected to the output shaft of the crushing motor via a coupling. Both ends of the oscillating shaft are equipped with oscillating cams via key connections, and the oscillating cams abut against the lower end face of the oscillating plate. Multiple extrusion plates are evenly installed on the inner side of the recycling bin, and all extrusion plates are located above the oscillating plate.

[0010] Preferably, the inner wall of the lower end of the compaction groove is uniformly provided with compaction teeth, and the compaction teeth located on both sides of the groove opening are staggered vertically. The extrusion plate is located directly above the compaction groove, and the thickness of the extrusion plate is less than the vertical distance between the compaction teeth on the front and rear sides of the compaction groove.

[0011] Preferably, the upper end of the diversion frame is a cylindrical structure, and the lower part of the cylinder has a fan-shaped slot with an obtuse angle. A screening screen is symmetrically installed on the left and right sides of the fan-shaped slot of the diversion frame by means of rotational engagement. The screening screen is inclined. The upper end of the screening screen is connected to the diversion frame through a screening spring. The lower end of the screening screen abuts against the side wall of the crushing chamber. Multiple baffles are installed between the crushing chambers on the left and right sides of the recovery chamber. The baffles are horizontally set and penetrate the screening screen.

[0012] Preferably, the recycling bin has open structures at both the top and bottom, and the upper opening of the recycling bin is located at the lower end of the inclined position of the screening screen.

[0013] Preferably, the crushing rack has a cylindrical structure, and multiple sets of arc-shaped rings are symmetrically installed on the left and right sides along the axial direction in the middle of the crushing rack. There is an acute angle notch between the upper ends of the arc-shaped rings in the same set. The inner wall of the arc-shaped rings is uniformly provided with helical teeth, and the helical teeth on the two arc-shaped rings in the same set have opposite helical directions.

[0014] Preferably, the left and right sidewalls of the crushing chamber are provided with multiple sets of clearance grooves, and a material discharge slot is provided between each pair of adjacent arc-shaped rings. The clearance grooves and material discharge slots correspond one-to-one. A set of crushing slide rods are installed at the upper and lower ends of the clearance grooves by sliding fit. A crushing shaft is installed between the crushing slide rods in the same set by sliding fit. The crushing shaft is connected to the crushing slide rods by crushing springs. A displacement rod is installed between the multiple sets of crushing slide rods. The displacement rods are located on the left and right sides of the crushing chamber, and the displacement rods are connected to the outer wall of the crushing chamber by tension springs.

[0015] Preferably, both ends of the crushing chamber are equipped with crushing slip rings by sliding fit. The crushing slip rings are coaxial with the crushing frame and are located on the left and right sides of the end of the crushing chamber. The crushing slip rings are fixedly connected to the end of the shifting rod. The end of the center shaft is equipped with a lever by key connection. The end of the lever is equipped with a roller by rotation fit, and the roller rolls against the side wall of the crushing slip ring.

[0016] Preferably, the inner radius of the crushing slip ring is smaller than the vertical distance between the end roller of the lever and the center axis of the middle shaft.

[0017] Preferably, the crushing shafts are all located in the material discharge slots between two adjacent arc-shaped rings, and the sidewalls of the crushing shafts are uniformly inserted with piercing teeth along their axial direction, and the piercing teeth are staggered vertically along the exposed length of the sidewalls of the crushing shafts.

[0018] Preferably, the piercing teeth are all installed at an angle on the side wall of the crushing shaft, and the piercing teeth on the left and right sides of the crushing frame are tilted in opposite directions.

[0019] The beneficial effects of this invention are:

[0020] (1) The waste sand crushing and recycling device of the present invention can disperse and isolate the centrally transported waste sand through the centrally arranged diversion frame and the inclined screening screen. At the same time, the vibration effect of the screening screen can accelerate the rate of small particles of waste sand from the waste sand block. The active screening and isolation of small particles of waste sand can accelerate the efficiency of subsequent waste sand block decomposition and crushing operations, avoid repeated operations, and improve the overall smoothness of the device operation.

[0021] (2) The waste sand crushing and recycling device of the present invention can actively overturn the accumulated waste sand by rotating the arc-shaped ring circumferentially. By intermittently moving the crushing axis of the arc-shaped ring closer and further away from the arc-shaped ring on both sides, the waste sand accumulated in the inner cavity of the arc-shaped ring can be twisted left and right in the horizontal direction, thereby causing cracks and faults in the lumps of waste sand. Combined with the subsequent spiral scraping action between the spiral teeth and the waste sand, the volume of the waste sand itself can be in a rolling state during the flow process, and the outer layer of the waste sand block is continuously squeezed and peeled, increasing the contact compression and friction between waste sand. The friction strength is increased, improving the decomposition and crushing efficiency of waste sand and enhancing the synchronization of waste sand crushing treatment at each level. The inclined piercing teeth allow the waste sand to be subjected to double compression and decomposition during the rotation of the arc ring. At the same time, the varying lengths of the piercing teeth enhance the engagement and interlocking of the waste sand with the piercing teeth during circumferential rotation, further enhancing the decomposition and crushing effect of the waste sand. The elastic connection between the crushing spring and the tension spring provides the crushing shaft with a certain degree of freedom in the horizontal or vertical direction, enhancing the vibration effect of the piercing teeth during the waste sand decomposition process and reducing the probability of blockage when waste sand particles flow.

[0022] (3) The waste sand crushing and recycling device of the present invention can enhance the blocking effect and blocking volume of waste sand particles by multiple rolling grooves arranged at intervals. The vibration of the oscillating plate can prevent the accumulation and blockage of waste sand particles, and can also improve the distribution range and thickness of waste sand particles on the oscillating plate. Through the squeezing of the extrusion plate and the blocking effect of the rolling teeth, the waste sand particles can be further decomposed and crushed during the falling process, and the volume of the decomposed and crushed waste sand particles is within the preset range. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the overall structure of a preferred embodiment of a waste sand crushing and recycling device provided by the present invention;

[0025] Figure 2 For the present invention Figure 1 A top-down view;

[0026] Figure 3 For the present invention Figure 2 A schematic cross-sectional view along the AA direction;

[0027] Figure 4 For the present invention Figure 3 Enlarged view of point C;

[0028] Figure 5 For the present invention Figure 3 Enlarged diagram of point D;

[0029] Figure 6 For the present invention Figure 2 BB-direction sectional view;

[0030] Figure 7 For the present invention Figure 6 Enlarged view of point E;

[0031] Figure 8 This is a partial three-dimensional structural cross-sectional view of the present invention;

[0032] Figure 9 This is a schematic diagram showing the positional relationship between the screening screen and the crushing chamber of the present invention;

[0033] Figure 10 This is a schematic diagram showing the position and connection relationship between the screening mesh and the diverter frame of the present invention;

[0034] Figure 11 This is a schematic diagram showing the positional relationship between the crushing chamber, the central shaft, and the crushing slip ring of the present invention;

[0035] Figure 12 This is a schematic diagram showing the positional relationship between the crushing frame, the arc-shaped ring, and the crushing shaft of the present invention.

[0036] Figure 13 This is a schematic diagram showing the positional relationship between the vibrating plate, the rolling groove, and the extrusion plate of the present invention.

[0037] In the diagram: 1. Base plate; 2. Recycling bin; 3. Diverter; 4. Crushing bin; 5. Crushing rack; 6. Center shaft; 7. Crushing motor; 8. Synchronous pulley; 9. Synchronous belt; 10. Support foot; 21. Vibrating slide bar; 22. Vibrating spring; 211. Vibrating plate; 212. Crushing groove; 23. Vibrating shaft; 231. Vibrating cam; 24. Extrusion plate; 213. Crushing teeth; 31. Screening screen; 32. Screening spring; 41. Divider bar; 51. Arc ring; 511. Spiral teeth; 42. Clearance groove; 421. Crushing slide bar; 422. Crushing shaft; 423. Crushing spring; 424. Displacement rod; 425. Tension spring; 426. Stamping teeth; 43. Crushing slip ring; 61. Toggle lever; 611. Roller. Detailed Implementation

[0038] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0039] An embodiment of the present invention is described below. Figure 1 , Figure 2 and Figure 3 A waste sand crushing and recycling device includes a base plate 1, a recycling bin 2, a diverter 3, a crushing bin 4, a crushing frame 5, a center shaft 6, a crushing motor 7, a synchronous pulley 8, a synchronous belt 9, and support feet 10. Support feet 10 are evenly installed on the lower end of the base plate 1. The recycling bin 2 is fixedly installed in the middle of the upper end of the base plate 1. Both the upper and lower ends of the recycling bin 2 are open structures. The diverter 3 is fixedly installed on the upper inner side of the base plate 1. The crushing bins 4 are symmetrically installed on the left and right sides of the middle of the recycling bin 2. The center shaft 6 is installed at both the front and rear ends of the crushing bin 4 by a rotatable fit. The crushing frame 5 is installed between the center shafts 6. The crushing motor 7 is fixedly installed on the side wall of the recycling bin 2 through a motor mount. The output shaft of the crushing motor 7 and the end of the center shaft 6 are both fixedly installed with synchronous pulleys 8, and the synchronous pulleys 8 are connected by a synchronous belt 9.

[0040] As one embodiment of the present invention, see [reference]. Figure 3 , Figure 8 , Figure 9 , Figure 10 and Figure 11 The upper end of the diversion frame 3 is a cylindrical structure, and the lower part of the cylinder has a fan-shaped slot with an obtuse angle. A screening screen 31 is symmetrically installed on the left and right sides of the fan-shaped slot of the diversion frame 3 by means of rotational engagement. The screening screen 31 is inclined, and the upper end of the screening screen 31 is connected to the diversion frame 3 by a pin. The upper end of the screening screen 31 is connected to the diversion frame 3 by a screening spring 32. The lower end of the screening screen 31 abuts against the side wall of the crushing chamber 4. Multiple baffles 41 are installed between the crushing chambers 4 on the left and right sides of the recovery chamber 2. The baffles 41 are horizontally set and pass through the screening screen 31. The upper and lower ends of the recovery chamber 2 are open structures, and the upper opening of the recovery chamber 2 is located at the lower end of the inclined position of the screening screen 31.

[0041] In practice, the crushing motor 7 is first started, driving the connected synchronous pulley 8 to rotate. This, in turn, is driven by the synchronous belt 9, which in turn drives two other synchronous pulleys 8 to rotate. These synchronous pulleys 8 then drive the central shaft 6 to rotate, which in turn drives the crushing frame 5 to rotate within the crushing chamber 4. Afterward, the foundry waste sand to be crushed is transported to the upper opening of the recycling chamber 2 by personnel or existing conveying equipment. Subsequently, under gravity, the waste sand falls into the recycling chamber 2. During its fall, the waste sand is diverted by the baffles at the upper end of the diversion frame 3, and then... The waste sand is dispersed on both sides of the recycling bin 2 and rolls downward under the inclined guidance of the screening screen 31. At this time, due to the different weights of the waste sand and the different falling positions, the screening screen 31 oscillates and swings within a certain angle under the impact of the falling waste sand and the elastic connection of the screening spring 32. During the rolling of the waste sand, some waste sand particles smaller than the diameter of the screen groove of the screening screen 31 pass through the screening screen 31 and fall to the position below the baffle bar 41. The oscillation of the screening screen 31 can accelerate the separation rate of small waste sand particles, while avoiding the blockage of the screening screen 31 caused by medium and large waste sand particles.

[0042] As one embodiment of the present invention, see [reference]. Figure 4 , Figure 7 , Figure 11 and Figure 12The crushing frame 5 is a cylindrical structure. Multiple sets of arc-shaped rings 51 are symmetrically installed along the axis in the middle of the crushing frame 5. An acute-angle notch is provided between the upper ends of the same set of arc-shaped rings 51. Spiral teeth 511 are evenly distributed on the inner wall of the arc-shaped rings 51, and the spiral directions of the spiral teeth 511 on two arc-shaped rings 51 in the same set are opposite. Multiple sets of clearance grooves 42 are provided on the left and right side walls of the crushing chamber 4. A material discharge slot is provided between adjacent sets of arc-shaped rings 51, and the clearance groove 42 and the material discharge slot... Each slot corresponds to a crushing slide bar 42. The upper and lower ends of the slot are fitted with a set of crushing slide bars 421 via a sliding fit. Crushing shafts 422 are fitted together within the same set of crushing slide bars 421 via a sliding fit. The crushing shafts 422 are connected to the crushing slide bars 421 via crushing springs 423. A shifting rod 424 is fitted together between multiple sets of crushing slide bars 421. The shifting rods 424 are located on the left and right sides of the crushing chamber 4, and are connected to the crushing chamber 4 via tension springs 425. The outer walls are connected, and both ends of the crushing chamber 4 are equipped with crushing slip rings 43 by sliding fit. The crushing slip rings 43 are coaxial with the crushing frame 5 and are located on the left and right sides of the end of the crushing chamber 4. The crushing slip rings 43 are fixedly connected to the end of the shifting rod 424. The end of the center shaft 6 is equipped with a lever 61 by key connection. The end of the lever 61 is equipped with a roller 611 by rotational fit, and the roller 611 rolls against the side wall of the crushing slip ring 43. Above, the inner radius of the crushing slip ring 43 is smaller than the vertical distance between the roller 611 at the end of the lever 61 and the center axis of the middle shaft 6. The crushing shafts 422 are all located in the material discharge slots between two adjacent arc-shaped rings 51. The side walls of the crushing shafts 422 are evenly inserted with piercing teeth 426 along their axial direction. The piercing teeth 426 are all installed at an angle on the side walls of the crushing shafts 422. The exposed length of the piercing teeth 426 on the side walls of the crushing shafts 422 is staggered vertically, and the piercing teeth 426 on the left and right sides of the crushing frame 5 are tilted in opposite directions.

[0043] In actual operation, as the crushing frame 5 rotates along with the central shaft 6, it further drives multiple sets of arc-shaped rings 51 to rotate synchronously. Subsequently, after the waste sand slides from the bottom of the screening screen 31 into the crushing chamber 4, it gradually accumulates at the top of the crushing chamber 4. Then, when the upper notch of the arc-shaped ring 51 rotates to the upper position of the crushing chamber 4, the waste sand falls into the cavity surrounded by the arc-shaped ring 51. Subsequently, the waste sand in the cavity rotates synchronously with the arc-shaped ring 51. The spiral teeth 511 set on the inner wall of the arc-shaped ring 51 can lift the waste sand and follow the arc-shaped ring 51. The rotation is synchronized, and the outer layer of waste sand is continuously squeezed and scraped by the spiral conveyor, so that the volume of the waste sand is continuously reduced during the rotation. The scraped waste sand particles then pass through the drop trough between the arc rings 51 and finally fall from the lower opening of the crushing chamber 4. When the upper notch of the arc ring 51 rotates to the upper opening of the crushing chamber 4 again, the waste sand accumulated in the crushing chamber 4 falls again and fills the hollow area in the cavity of the arc ring 51. This process is repeated to carry out intermittent conveying and crushing of waste sand.

[0044] In the initial position, the displacement rod 424 is attached to the side wall of the crushing chamber 4 under the tension of the tension spring 425. The attachment of the displacement rod 424 causes the crushing slide rod 421 to extend to the inner side of the crushing chamber 4. At this time, the crushing shaft 422 approaches the axis of the crushing frame 5 under the pushing action of the crushing slide rod 421. As the waste sand fills the arc-shaped ring 51 around the cavity, the middle part of the crushing shaft 422 is gradually buried in the waste sand. Subsequently, as the crushing frame 5 drives the arc-shaped ring 51 and the waste sand inside the arc-shaped ring 51 to rotate, the crushing shaft 422 remains in a vertical state. During the circumferential rotation of the waste sand... Upon contact with the tip of the 426, the waste sand block begins to break apart. The inclined 426 causes the waste sand to be subjected to double compression and decomposition as it rotates with the arc ring 51. At the same time, the varying lengths of the 426 enhance the engagement and interlocking of the waste sand with the 426 during circumferential rotation, further enhancing the decomposition and crushing effect of the waste sand. The elastic connection of the crushing spring 423 provides the crushing shaft 422 with a certain degree of freedom for vibration, while also enhancing the vibration effect of the 426 during the decomposition of waste sand and reducing the probability of waste sand particles getting stuck.

[0045] As the central shaft 6 drives the crushing frame 5 to rotate, it further drives the lever 61 to rotate. The lever 61 drives the roller 611 to rotate circumferentially. When the roller 611 rotates to the position of the crushing slip ring 43, the squeezing and pushing action of the roller 611 causes the crushing slip ring 43 to gradually move away from the center of the crushing frame 5. The crushing slip ring 43 drives the shifting rod 424 away from the outer wall of the crushing chamber 4. The shifting rod 424 further pulls the crushing slide rod 421 away from the inner side of the crushing chamber 4. The crushing slide rod 421 drives the crushing shaft 422 and the chuck teeth 426 to move away from the axis of the crushing frame 5. After that, the distance between the crushing shafts 422 on the left and right sides of the crushing frame 5 increases. The waste sand particles that were previously clamped then begin to collapse and move towards the crushing frame 5. The bottom slides down, further hollowing out the upper notch of the arc ring 51. Then, when the upper notch of the arc ring 51 rotates to the upper position of the crushing chamber 4, the waste sand accumulated in the crushing chamber 4 falls down and fills the cavity inside the arc ring 51. When the roller 611 rotates to the predetermined position and disengages from the crushing slip ring 43, the crushing shaft 422 returns to the center area of ​​the crushing frame 5 under the tension of the tension spring 425. During the resetting process, the waste sand is squeezed and crushed. This process is repeated. During one rotation of the lever 61, the crushing shafts 422 on the left and right sides of the crushing frame 5 can each perform a crushing operation. Combined with the decomposition of waste sand when the arc ring 51 rotates, the crushing efficiency of the waste sand can be further improved.

[0046] As one embodiment of the present invention, see [reference]. Figure 3 , Figure 5 , Figure 6 , Figure 8 and Figure 13 The recycling bin 2 has oscillating slide rods 21 installed around its inner perimeter via a sliding fit. These slide rods 21 are connected to the inner wall of the recycling bin 2 via oscillating springs 22. An oscillating plate 211 is installed at the upper end of each slide rod 21. The oscillating plate 211 has downwardly extending trumpet-shaped crushing grooves 212 evenly distributed in its center. An oscillating shaft 23 is fixedly installed at the lower part of the recycling bin 2 via bearings. One end of the oscillating shaft 23 is connected to the output shaft of the crushing motor 7 via a coupling. Both ends of the oscillating shaft 23 are connected by keys. An oscillating cam 231 is installed and abuts against the lower end face of the oscillating plate 211. Multiple extrusion plates 24 are evenly installed on the inner side of the recovery chamber 2, and the extrusion plates 24 are all located above the oscillating plate 211. The lower inner wall of the crushing groove 212 is evenly provided with crushing teeth 213, and the crushing teeth 213 located on both sides of the groove opening of the crushing groove 212 are staggered vertically. The extrusion plate 24 is located directly above the crushing groove 212, and the thickness of the extrusion plate 24 is less than the vertical distance between the crushing teeth 213 on the front and rear sides of the crushing groove 212.

[0047] In practice, as the decomposed and crushed waste sand falls from the bottom of the screening screen 31 or the crushing chamber 4, it eventually falls onto the upper surface of the vibrating plate 211 and gradually accumulates. A portion of the waste sand that falls onto the upper surface of the vibrating plate 211 slides directly into the compaction trough 212. Subsequently, waste sand within a predetermined volume range passes through the compaction trough 212 and falls out of the device through the lower opening of the recovery chamber 2. Afterward, it is collected or transferred by workers using existing collection boxes or conveying equipment. Waste sand particles exceeding the predetermined volume range accumulate on the upper surface of the vibrating plate 211 and in the compaction trough 212. When the crushing motor 7 is running, it further drives the oscillating shaft 23 to rotate. The oscillating shaft 23 drives the oscillating cam 231 to rotate. During the rotation, the oscillating cam 231 slides against the lower end face of the oscillating plate 211, causing the oscillating plate 211 to move up and down in the recycling bin 2. The oscillating slide bar 21 can limit the movement path of the oscillating plate 211, and the elastic force of the oscillating spring 22 keeps the oscillating plate 211 against the side wall of the oscillating cam 231. During the upward movement of the oscillating plate 211, it further drives the waste sand particles accumulated on the upper surface to move upward synchronously.

[0048] When the vibrating plate 211 moves to the predetermined height position, the lower end of the extrusion plate 24 begins to enter the upper end of the trumpet-shaped opening of the compaction trough 212. Then, during the further upward movement of the vibrating plate 211, the lower end of the extrusion plate 24 enters the inner side of the compaction trough 212, and through extrusion, pushes the waste sand particles accumulated in the compaction trough 212 downwards. The compaction teeth 213 set on the inner wall of the opening of the compaction trough 212 can further separate the waste sand particles and decompose and break them down until the lower end of the extrusion plate 24 completely passes through the compaction trough 212. Afterwards, the vibrating cam 2... 31. Rotation reset: Under the elastic reset action of the oscillating spring 22, the oscillating plate 211 begins to reset, and drives the accumulated waste sand particles to reset synchronously downward. When the oscillating plate 211 is reset to the initial position, the vibration action when the oscillating plate 211 contacts the inner wall of the recycling bin 2 causes the waste sand accumulated on the upper surface of the oscillating plate 211 to gradually disperse and slide into the crushing trough 212. This process is repeated. Through the continuous rotation of the oscillating cam 231, the oscillating plate 211 is intermittently moved up and down, further carrying out the intermittent pushing and decomposition crushing operation of the waste sand particles.

[0049] During work:

[0050] Step 1: First, start the crushing motor 7. The crushing motor 7 drives the connected synchronous pulley 8 to rotate, which in turn drives two other synchronous pulleys 8 through the transmission connection of the synchronous belt 9. The synchronous pulleys 8 drive the central shaft 6 to rotate, which in turn drives the crushing frame 5 to rotate within the crushing chamber 4. Then, the foundry waste sand to be crushed is transported to the upper opening of the recycling chamber 2 by personnel or existing conveying equipment. Subsequently, under the action of gravity, the waste sand falls into the interior of the recycling chamber 2. During the falling process, the waste sand is dispersed to both sides of the recovery bin 2 by the diversion action of the upper baffle of the diversion frame 3, and rolls down under the inclined guidance of the screening screen 31. At this time, due to the different weights of the waste sand and the different falling positions, the screening screen 31 oscillates and swings within a certain angle under the impact of the falling waste sand and the elastic connection of the screening spring 32. During the rolling of the waste sand, some waste sand particles smaller than the diameter of the screen groove of the screening screen 31 pass through the screening screen 31 and fall to the position below the baffle bar 41.

[0051] Step 2: As the crushing frame 5 rotates along with the central shaft 6, it further drives multiple sets of arc-shaped rings 51 to rotate synchronously. Subsequently, after the waste sand slides from the bottom of the screening screen 31 into the crushing chamber 4, it gradually accumulates at the top of the crushing chamber 4. Then, when the upper notch of the arc-shaped ring 51 rotates to the upper position of the crushing chamber 4, the waste sand falls into the cavity surrounded by the arc-shaped ring 51. Subsequently, the waste sand in the cavity rotates synchronously with the arc-shaped ring 51. The spiral teeth 511 set on the inner wall of the arc-shaped ring 51 can lift the waste sand to follow the rotation of the arc-shaped ring 51. The synchronization of the movement, while the spiral conveyor continuously squeezes and scrapes the outer layer of waste sand, causing the volume of the waste sand to shrink continuously during the rotation. The scraped-off waste sand particles then pass through the drop trough between the arc rings 51 and finally fall from the lower opening of the crushing chamber 4. When the upper notch of the arc ring 51 rotates to the upper opening of the crushing chamber 4 again, the waste sand accumulated in the crushing chamber 4 falls again and fills the hollow area in the cavity of the arc ring 51. This process is repeated to carry out intermittent conveying and crushing of waste sand.

[0052] Step 3: In the initial position, the displacement rod 424 is attached to the side wall of the crushing chamber 4 under the tension of the tension spring 425. The attachment of the displacement rod 424 causes the crushing slide rod 421 to extend to the inside of the crushing chamber 4. At this time, the crushing shaft 422 is pushed by the crushing slide rod 421 and approaches the axis of the crushing frame 5. As the waste sand fills the arc ring 51 around the cavity, the middle part of the crushing shaft 422 is gradually buried in the waste sand. Subsequently, as the crushing frame 5 drives the arc ring 51 and the waste sand in the arc ring 51 to rotate, the crushing shaft 422 is always in a vertical state. When the waste sand contacts the tip of the piercing tooth 426 during the circumferential rotation, the waste sand block itself begins to split and break.

[0053] Step 4: As the central shaft 6 drives the crushing frame 5 to rotate, it further drives the lever 61 to rotate. The lever 61 drives the roller 611 to rotate circumferentially. When the roller 611 rotates to the position of the crushing slip ring 43, the squeezing and pushing action of the roller 611 causes the crushing slip ring 43 to gradually move away from the center of the crushing frame 5. The crushing slip ring 43 drives the shifting rod 424 away from the outer wall of the crushing chamber 4. The shifting rod 424 further pulls the crushing slide rod 421 away from the inner side of the crushing chamber 4. The crushing slide rod 421 drives the crushing shaft 422 and the chuck teeth 426 to move away from the axis of the crushing frame 5. After that, the distance between the crushing shafts 422 on the left and right sides of the crushing frame 5 increases. The waste sand particles that were previously clamped then begin to collapse and move towards the crushing frame. The bottom of the ring 51 slides down, further hollowing out the upper notch of the arc ring 51. Then, when the upper notch of the arc ring 51 rotates to the upper position of the crushing chamber 4, the waste sand accumulated in the crushing chamber 4 falls down and fills the cavity inside the arc ring 51. When the roller 611 rotates to the predetermined position and disengages from the crushing slip ring 43, the crushing shaft 422 returns to the center area of ​​the crushing frame 5 under the tension of the tension spring 425. During the resetting process, the waste sand is squeezed and crushed. This process is repeated. During one rotation of the lever 61, the crushing shafts 422 on the left and right sides of the crushing frame 5 can perform a crushing operation once. Combined with the decomposition of the waste sand when the arc ring 51 rotates, the crushing efficiency of the waste sand can be further improved.

[0054] Step 5: As the decomposed and crushed waste sand falls from the bottom of the screening screen 31 or the crushing chamber 4, the waste sand eventually falls onto the upper surface of the vibrating plate 211 and gradually accumulates. A portion of the waste sand falling onto the upper surface of the vibrating plate 211 slides directly into the crushing trough 212. Subsequently, waste sand within a predetermined volume range passes through the crushing trough 212 and falls out of the device through the lower opening of the recovery chamber 2. Afterwards, it is collected or transferred by workers using existing collection boxes or conveying equipment. Waste sand particles exceeding the predetermined volume range accumulate on the upper surface of the vibrating plate 211 and in the crushing trough 212. During operation, the crushing motor 7 further drives the oscillating shaft 23 to rotate, which in turn drives the oscillating cam 231 to rotate. During rotation, the oscillating cam 231 slides against the lower end face of the oscillating plate 211, causing the oscillating plate 211 to move up and down within the recycling bin 2. The oscillating slide bar 21 limits the movement path of the oscillating plate 211, and the elastic force of the oscillating spring 22 keeps the oscillating plate 211 against the side wall of the oscillating cam 231. During the upward movement of the oscillating plate 211, the waste sand particles accumulated on the upper surface are driven to move upward synchronously.

[0055] When the vibrating plate 211 moves to the predetermined height position, the lower end of the extrusion plate 24 begins to enter the upper end of the trumpet-shaped opening of the compaction trough 212. Then, during the further upward movement of the vibrating plate 211, the lower end of the extrusion plate 24 enters the inner side of the compaction trough 212, and through extrusion, pushes the waste sand particles accumulated in the compaction trough 212 downwards. The compaction teeth 213 set on the inner wall of the opening of the compaction trough 212 can further separate the waste sand particles and decompose and break them down until the lower end of the extrusion plate 24 completely passes through the compaction trough 212. Afterwards, the vibrating cam 2... 31. Rotation reset: Under the elastic reset action of the oscillating spring 22, the oscillating plate 211 begins to reset, and drives the accumulated waste sand particles to reset synchronously downward. When the oscillating plate 211 is reset to the initial position, the vibration action when the oscillating plate 211 contacts the inner wall of the recycling bin 2 causes the waste sand accumulated on the upper surface of the oscillating plate 211 to gradually disperse and slide into the crushing trough 212. This process is repeated. Through the continuous rotation of the oscillating cam 231, the oscillating plate 211 is intermittently moved up and down, further carrying out the intermittent pushing and decomposition crushing operation of the waste sand particles.

[0056] The foregoing has shown and described 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 embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of protection claimed by the present invention. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A waste sand crushing and recycling device, comprising a base plate (1), a recycling bin (2), a shunt frame (3), a crushing bin (4), a crushing frame (5), a middle shaft (6), a crushing motor (7), a synchronous wheel (8), a synchronous belt (9) and a supporting foot (10), characterized in that: The lower end of the substrate (1) is uniformly provided with supporting feet (10), the upper end of the substrate (1) is fixedly provided with a recycling bin (2), the upper and lower ends of the recycling bin (2) are open structures, the inner side of the substrate (1) is fixedly provided with a shunt frame (3), the middle part of the recycling bin (2) is symmetrically provided with a crushing bin (4), the front and rear ends of the crushing bin (4) are fixedly provided with a middle shaft (6) through a rotating fit, the middle shaft (6) is jointly provided with a crushing frame (5), the side wall of the recycling bin (2) is fixedly provided with a crushing motor (7) through a motor base, the output shaft of the crushing motor (7) and the end of the middle shaft (6) are fixedly provided with synchronous wheels (8), and the synchronous wheels (8) are drivingly connected through a synchronous belt (9). The inner side of the recycling bin (2) is uniformly provided with oscillating slide rods (21) through a sliding fit, the oscillating slide rods (21) are connected with the inner wall of the recycling bin (2) through oscillating springs (22), the upper end of the oscillating slide rod (21) is jointly provided with an oscillating plate (211), the middle part of the oscillating plate (211) is uniformly provided with trumpet-shaped rolling grooves (212) extending downward, the lower part of the recycling bin (2) is fixedly provided with an oscillating rotating shaft (23) through a bearing, one end of the oscillating rotating shaft (23) is connected with the output shaft of the crushing motor (7) through a shaft coupling, the two ends of the oscillating rotating shaft (23) are provided with oscillating cams (231) through a key connection, the oscillating cams (231) abut against the lower end face of the oscillating plate (211), and the inner side of the recycling bin (2) is uniformly provided with a plurality of extrusion plates (24), and the extrusion plates (24) are located above the oscillating plate (211). The crushing frame (5) is a cylindrical structure, a plurality of groups of arc-shaped rings (51) are symmetrically provided on the middle part of the crushing frame (5) along the axial direction, the upper ends of the arc-shaped rings (51) in the same group are provided with notches with an acute included angle, the inner wall of the arc-shaped ring (51) is uniformly provided with helical teeth (511), and the helical directions of the helical teeth (511) on the two arc-shaped rings (51) in the same group are opposite. The left and right side walls of the crushing bin (4) are provided with a plurality of groups of displacement sliding grooves (42), a blanking notch is arranged between the two adjacent groups of arc-shaped rings (51), the displacement sliding grooves (42) correspond to the blanking notches one by one, a group of crushing slide rods (421) are jointly provided in the grooves of the displacement sliding grooves (42) through a sliding fit, the crushing slide rods (421) in the same group are jointly provided with a crushing shaft (422) through a sliding fit, the side wall of the crushing shaft (422) is uniformly inserted with a click (426) along the axial direction, the crushing shaft (422) is connected with the crushing slide rod (421) through a crushing spring (423), a plurality of groups of crushing slide rods (421) are jointly provided with a displacement rod (424), the displacement rod (424) is located on the left and right sides of the crushing bin (4), and the displacement rod (424) is connected with the outer wall of the crushing bin (4) through a tension spring (425).

2. The device for crushing and recycling waste sand according to claim 1, characterized in that: The lower end inner wall of the rolling groove (212) is uniformly provided with rolling teeth (213), the rolling teeth (213) located at both sides of the groove opening of the rolling groove (212) are vertically staggered, the extrusion plate (24) is located directly above the rolling groove (212), and the thickness of the extrusion plate (24) is less than the vertical distance between the front and rear rolling teeth (213) in the rolling groove (212).

3. The device for crushing and recycling waste sand according to claim 1, characterized in that: The upper end of the shunt frame (3) is a cylindrical structure, and the lower part of the cylinder is provided with a scallop-shaped slot with an obtuse angle, the shunt frame (3) is symmetrically installed with a screening net (31) on both sides through rotating cooperation at the position of the scallop-shaped slot, the screening net (31) is inclined, the upper end of the screening net (31) is connected with the shunt frame (3) through a screening spring (32), the lower end of the screening net (31) abuts against the side wall of the crushing bin (4), a plurality of partition rods (41) are installed between the crushing bins (4) on the left and right sides of the recovery bin (2), the partition rods (41) are horizontally arranged and penetrate the screening net (31).

4. The device for crushing and recycling waste sand according to claim 3, characterized in that: The upper end opening position of the recovery bin (2) is located below the inclined position of the screening net (31).

5. The device for crushing and recycling waste sand according to claim 1, characterized in that: The crushing bin (4) is provided with a crushing sliding ring (43) at each of the front and rear ends through sliding cooperation, the crushing sliding ring (43) is coaxial with the crushing frame (5), the crushing sliding ring (43) is located on the left and right sides of the end of the crushing bin (4), and the end of the crushing sliding ring (43) is fixedly connected with the end of the displacement rod (424), the end of the middle shaft (6) is provided with a lever (61) through key connection, the end of the lever (61) is provided with a roller (611) through rotating cooperation, and the roller (611) rolls against the side wall of the crushing sliding ring (43).

6. A device for crushing and recycling waste sand according to claim 5, characterized in that: The inner wall radius of the crushing sliding ring (43) is less than the vertical distance between the end roller (611) of the lever (61) and the axis of the middle shaft (6).

7. The device for crushing and recycling waste sand according to claim 1, characterized in that: The crushing shafts (422) are located in the material falling grooves between the adjacent two arc-shaped rings (51), and the exposed lengths of the pawls (426) on the side walls of the crushing shafts (422) are vertically staggered.

8. A device for crushing and recycling waste sand according to claim 7, characterized in that: The pawls (426) are inclinedly installed on the side walls of the crushing shafts (422), and the inclined directions of the pawls (426) on the left and right sides of the crushing frame (5) are opposite.

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