Foundry waste sand regeneration and reuse integrated treatment equipment

Abstract

The invention relates to the field of casting recovery, and discloses casting waste sand regeneration and reuse integrated treatment equipment which comprises a partition bearing mechanism located on a bottom rack and used for continuously receiving to-be-treated casting waste sand in a partition mode in cooperation with a horizontal feeding hopper and a motor conduction piece. Meanwhile, an independent waste sand treatment area and an impurity removal area which are circumferentially distributed inside are formed; the center gear matched with the standing tank and the standing material bearing tank are used for making rotary contact with the casting waste sand and conducting refining treatment. And the auxiliary iron removal mechanism is located on the bottom frame and is matched with the standing gear ring, the side edge groove and the opposite stripping plate of the standing tank to be used for conducting iron removal operation on waste sand in the refining process. Through rotary driving of the partition bearing mechanism and accurate alignment of the horizontal feeding hopper, intermittent quantitative feeding of casting waste sand is achieved, the periodic material receiving design of the standing material bearing tank ensures continuous circulation of the waste sand in dynamic operation, and the no-load waiting period of traditional batch treatment is avoided.

Description

Technical Field

[0001] This invention relates to the field of foundry recycling technology, specifically to an integrated treatment equipment for the recycling and reuse of foundry waste sand. Background Technology

[0002] Sand casting is a casting method that produces castings in sand molds. Due to its advantages such as high molding efficiency, short production cycle, and the availability and low cost of molding sand, it remains a commonly used process in casting production. It mainly involves using molding sand to create a mold cavity, then pouring the casting into the mold. After casting, the part is removed, and the waste sand in the sand box is emptied, allowing the sand box to be recycled. The waste sand removed after casting often contains binders, sand lumps, and molten metal slag, and is therefore often discarded, leading to resource waste and increased production costs. To reduce production costs, it is often necessary to separate and recycle the used waste sand for reuse.

[0003] Traditional foundry waste sand recycling processes suffer from systemic defects such as fragmented processes, incomplete iron removal, waste of heat energy, uneven crushing, large space occupation, and insufficient removal of residues. Static magnetic separation has a low capture rate of deep iron powder, and residual impurities cause secondary pollution. Single crushing methods are prone to polarization of particle size. Multiple equipment layouts occupy a large area and are complex to operate. Uneven heating in traditional thermal regeneration leads to carbonization and deposition of residues. These shortcomings seriously restrict the quality of regenerated sand and the economic efficiency of the process. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides an integrated treatment equipment for the recycling and reuse of foundry waste sand, which solves the problems of traditional foundry waste sand recycling processes such as fragmented processes, incomplete static magnetic separation for iron removal, uneven particle size due to single crushing, and uneven heating during thermal regeneration.

[0005] To achieve the above objectives, the present invention provides the following technical solution: an integrated treatment device for the recycling and reuse of foundry waste sand, comprising: The bottom frame is used to fix the structure of the integrated treatment equipment for the recycling and reuse of foundry waste sand. The settling tank is located on the bottom frame and supports all the foundry waste sand recycling structures in an inclined manner; The horizontal feed hopper is located on the settling tank and is used to input foundry waste sand to be treated; The embedded tank is located on the settling tank and works in conjunction with the settling tank to receive the refined and iron-removed foundry waste sand and perform heat treatment; The motor drive unit is located on the settling tank and is used to generate the driving torque for the entire waste sand rotation process; The partitioned support mechanism is located on the bottom frame and works with the horizontal feed hopper and motor transmission components to continuously receive foundry waste sand to be processed in a partitioned manner, while forming an independent waste sand processing area and a waste discharge area distributed in an internal circle. The auxiliary refining mechanism is located on the bottom frame and works with the central gear of the settling tank and the settling material tank to rotate and contact the foundry waste sand and perform refining treatment. The auxiliary iron removal mechanism is located on the bottom frame and works with the stationary toothed ring, side groove and opposing stripping plate of the stationary tank to remove iron from the waste sand during the refining process, while also separating it. The centralized hot drying unit is located on the bottom frame and is used in conjunction with the static material receiving tank to heat the iron-removed and refined waste sand.

[0006] Preferably, the settling tank is fixed to the top of the base frame in an inclined manner, and the inclined bottom end is an open structure. The settling gear ring and the central gear structure are fixed to the top of the settling tank in an inclined state and are in a coaxial state. The horizontal feed hopper is fixed to the inclined top surface of the settling tank. The inner tank is embedded and fixed inside the settling tank and protrudes along the open structure of the settling tank. At the same time, heating elements are arranged circumferentially on the side wall of the inner tank. The motor conductor is located at the end of the settling tank away from the inner tank. The partitioned bearing mechanism is embedded in the settling tank and close to the horizontal feed hopper. The bottom of the side wall of the settling tank is provided with a slag discharge trough and is placed between the partitioned bearing mechanism and the inner tank to discharge the iron powder slag separated by the partitioned bearing mechanism. The auxiliary refining mechanism consists of multiple sets and is arranged circumferentially in the partitioned bearing mechanism. The auxiliary iron removal mechanism is also arranged circumferentially in the partitioned bearing mechanism. The centralized heat drying mechanism is embedded in the inner tank.

[0007] Preferably, the partitioned bearing mechanism includes an inner nested tank and a stationary material receiving tank. The inner nested tank is embedded and rotated on the inner wall of the stationary tank, and the stationary material receiving tanks are circumferentially distributed and fixed inside the inner nested tank to serve as the initial bearing structure for waste sand. Adjacent stationary material receiving tanks form a slag discharge area with the inner wall of the inner nested tank. The contact surfaces of the stationary material receiving tank and the inner nested tank are jointly provided with a feeding channel, and the output port of the horizontal feeding hopper is located on the displacement trajectory line of all feeding channels.

[0008] Preferably, the auxiliary refining mechanism includes an embedded sleeve shaft, which is embedded and rotates within each set of inner nested tanks, extends out of the inner nested tanks, and enters the settling tank. It also circumferentially surrounds the central gear of the settling tank. The portion of the embedded sleeve shaft extending into the inner nested tank is relatively fixed with crushing blades, which are located at both ends inside the inner nested tank. Refining blades are fixedly distributed circumferentially between the crushing blades.

[0009] Preferably, the auxiliary iron removal mechanism includes a sealing roller, which is embedded in the outer wall of the stationary material receiving tank and adheres to the feed channel on the outside of the stationary material receiving tank. A magnetic sleeve is sleeved on the outside of the sealing roller, and the inner side of the sealing roller and the magnetic sleeve are simultaneously embedded into the stationary material receiving tank along the feed channel. The end of the opposing stripping plate adheres to the surface of the magnetic sleeve to form a scraping state.

[0010] Preferably, the centralized heating mechanism includes an embedded filter tube, which is embedded and rotated inside an embedded tank. The embedded filter tube extends to the inner end of the embedded tank and is fixed with a docking plate. The docking plate is provided with circumferentially distributed through holes corresponding to the number of stationary material receiving tanks, and is docked and fixed with the corresponding stationary material receiving tanks. The docking plate also closes the inner port of the embedded tank. A spiral conveying channel is fixed around the outside of the embedded filter tube and is attached to the inner wall of the embedded tank.

[0011] Preferably, the side grooves are distributed on both sides of the stationary material receiving tank, and drive the interior of the stationary material receiving tank to communicate with the slag discharge area of ​​the inner nested tank. The opposing peeling plate is a V-shaped blade structure and is fixed at the center of the slag discharge area of ​​the inner nested tank.

[0012] Preferably, one end of the embedded sleeve shaft extending into the settling tank is fixed with a traction gear, and all traction gears are meshed around the central gear key of the settling tank.

[0013] Preferably, one end of the sealing roller extends out of the inner nested tank and circumferentially surrounds the inside of the stationary toothed ring of the stationary tank, and a second traction gear is fixed at this end, which meshes around the inner toothed key of the stationary toothed ring of the stationary tank.

[0014] Preferably, the outer output end of the embedded filter tube is provided with an adsorption fan.

[0015] This invention provides an integrated treatment device for the recycling and reuse of foundry waste sand. It has the following beneficial effects: 1. This invention has continuous and efficient processing capabilities: The equipment achieves intermittent quantitative feeding of foundry waste sand through the rotation drive of the partitioned bearing mechanism and the precise alignment of the horizontal feeding hopper. The periodic receiving design of the static receiving tank ensures that the waste sand continues to flow in dynamic operation, avoiding the idle waiting period of traditional batch processing. The planetary motion system driven by the motor transmission component simultaneously completes multiple processes such as crushing, iron removal, and heat drying, significantly shortening the single processing cycle. The material is automatically transferred under the combined force of gravity and mechanical force, without the need for manual intervention during transfer, greatly increasing the processing capacity per unit time.

[0016] 2. This invention has the effect of deep refining and homogenization of pulverization: The auxiliary refining mechanism, through the meshing of the traction gear and the central gear, forces the crushing blades and refining blades to rotate at high speed in the opposite direction to the revolution. This differential motion mode forms a high-intensity shearing field and grinding field in the stationary material receiving tank. The sand blocks are repeatedly impacted by the multi-stage blades in the centrifugal tumbling. The material tumbling over the entire area caused by the revolution ensures that there are no dead corners in the pulverization. The three-dimensional layout of the blade edge realizes the progressive treatment from coarse crushing to fine grinding. The waste sand particles reach a highly uniform ultra-fine state, providing ideal raw materials for subsequent iron removal and regeneration.

[0017] 3. This invention features dynamic magnetic separation and precise impurity separation: Under the drive of the second traction gear, the magnetic sleeve of the auxiliary iron removal mechanism forms a rotating magnetic field in the stationary material receiving tank. After the iron powder impurities are attracted to the surface of the magnetic sleeve, they migrate directionally to the side groove with the revolution. The opposing peeling plate in the slag discharge area scrapes off the iron powder on the surface of the magnetic sleeve with a V-shaped cutting edge. The peeling action is strictly synchronized with the rotation of the magnetic sleeve. The inclined slag discharge channel uses its own weight to realize the automatic sliding of the slag. This design ensures that the iron powder impurities are removed in real time during the crushing process, avoiding secondary pollution of the regenerated sand. Attached Figure Description

[0018] Figure 1 This is a three-dimensional schematic diagram of the main body of the present invention. Figure 1 ; Figure 2 This is a three-dimensional schematic diagram of the main body of the present invention. Figure 2 ; Figure 3 This is a schematic diagram of the static tank structure assembly of the present invention; Figure 4 This is a schematic diagram of the internal structure assembly of the settling tank of the present invention; Figure 5 This is a schematic cross-sectional view of the static tank structure of the present invention; Figure 6 This is a schematic diagram of the partitioned bearing mechanism of the present invention; Figure 7 This is a schematic cross-sectional view of the partitioned bearing mechanism structure of the present invention. Figure 1 ; Figure 8 This is a schematic cross-sectional view of the partitioned bearing mechanism structure of the present invention. Figure 2 ; Figure 9 This is a schematic diagram of the auxiliary refinement mechanism structure of the present invention; Figure 10 This is a schematic diagram of the auxiliary iron removal mechanism of the present invention; Figure 11 This is a schematic diagram of the structural combination of the partitioned bearing mechanism and the centralized heating mechanism of the present invention; Figure 12 This is a cross-sectional schematic diagram of the centralized hot drying mechanism of the present invention.

[0019] The components include: 1. Base frame; 2. Static tank; 3. Horizontal feed hopper; 4. Embedded tank; 5. Motor transmission component; 6. Zoned bearing mechanism; 7. Auxiliary refining mechanism; 8. Auxiliary iron removal mechanism; 9. Centralized heating and drying mechanism; 61. Inner nested tank; 62. Static material receiving tank; 63. Feed channel; 64. Side groove; 65. Opposite stripping plate; 71. Embedded sleeve shaft; 72. Crushing blade; 73. Refining blade; 74. Traction gear one; 81. Sealing roller; 82. Magnetic sleeve; 83. Traction gear two; 91. Embedded filter tube; 92. Connecting plate; 93. Spiral conveyor channel; 94. Adsorption fan component. Detailed Implementation

[0020] The technical solutions in 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.

[0021] Please see the appendix Figure 1 -Appendix Figure 2 This invention provides an integrated treatment equipment for the recycling and reuse of foundry waste sand, including: a base frame 1 for fixing the structure of the integrated treatment equipment for the recycling and reuse of foundry waste sand. The base frame 1 provides a stable static bearing platform. The frame is rigidly connected to the ground to form a torsional mechanical frame. The tilt load of the static tank 2 is distributed to the ground through the truss structure of the base frame 1, eliminating the dynamic eccentric torque generated by the rotating mechanism during equipment operation. The geometric design of the base frame 1 ensures that the tilt angle of the static tank 2 is constant, making gravity the core driving force for material conveying. The internal reinforcing rib layout compensates for the eccentric mass distribution of the partitioned bearing mechanism 6, suppressing the resonance risk caused by rotational inertia. The metal material of the base frame 1 is selected to take into account both corrosion resistance and fatigue strength to cope with the high temperature and high humidity environment of foundry waste sand treatment. Please see the appendix Figure 1 -Appendix Figure 3The settling tank 2 is located on the base frame 1 and supports all the foundry waste sand recycling structures in an inclined manner. The settling tank 2 is fixed to the top of the base frame 1 in an inclined manner, and the inclined bottom end is an open structure. The settling gear ring and the central gear structure are fixed to the top of the settling tank 2 in an inclined state and are in a coaxial state. The bottom of the side wall of the settling tank 2 is provided with a slag discharge trough, which is placed between the partitioned bearing mechanism 6 and the inner tank 4 to discharge the iron powder slag separated by the partitioned bearing mechanism 6. The settling tank 2 constitutes the main processing chamber of the equipment, and its inclined installation forms a fixed The stationary gear ring at the top of the tank and the central gear form a fixed reference surface for the planetary transmission system, which provides reverse rotation driving force for the auxiliary refining mechanism 7 and the auxiliary iron removal mechanism 8. The open structure at the inclined bottom, together with the slag discharge trough, forms a dedicated discharge path for iron powder slag. The tilt angle is used to achieve the sliding of slag material by its own weight. The mirror treatment of the inner wall of the tank reduces material adhesion, while the wedge design of the slag discharge trough prevents iron powder backflow. The sealed cavity of the stationary tank 2 isolates external pollution, and at the same time, the airflow direction is controlled by the guide ribs on the inner wall to ensure concentrated extraction of hot gas. Please see the appendix Figure 3 -Appendix Figure 4 The horizontal feed hopper 3 is located on the settling tank 2 and is used to input the foundry waste sand to be processed. The horizontal feed hopper 3 is fixed on the inclined top surface of the settling tank 2. The horizontal feed hopper 3 realizes the continuous quantitative supply of waste sand. Its horizontal inlet design eliminates the dead corner of material accumulation. The outlet end is precisely aligned with the rotation trajectory line of the feed channel 63. Under the action of gravity, the waste sand forms a vertical column of material. The flow is accelerated through the conical contraction section of the hopper body. When the feed channel 63 rotates to the bottom of the hopper opening, the material column is instantly injected into the settling tank 62. The feeding sequence is controlled by the rotation speed of the partition bearing mechanism 6 to achieve equal filling of each settling tank 62. Please see the appendix Figure 3 -Appendix Figure 4 The embedded tank 4 is located on the settling tank 2 and works with the settling tank 2 to receive the refined iron removal foundry waste sand and perform heat treatment. The embedded tank 4 is embedded and fixed inside the settling tank 2 and protrudes along the open structure of the settling tank 2. At the same time, heating elements are distributed around the side wall of the embedded tank 4. As the core container for heat treatment, the embedded tank 4 generates a radial heat radiation field through its circumferentially distributed heating elements. The tank wall is made of thermally conductive composite material, which efficiently transfers energy to the contact material through heat conduction. The sandwich structure of the embedded tank 4 forms an insulation cavity to reduce heat loss. The tight design of the spiral conveyor channel 93 with the tank wall maximizes the thermal contact area. The temperature gradient inside the tank changes along the axial direction to achieve a step-by-step heating of the waste sand. Please see the appendix Figure 4 The motor transmission component 5 is located on the settling tank 2 and is used to generate the driving torque for the entire waste sand rotation process. The motor transmission component 5 is set at the end of the settling tank 2 away from the inner tank 4. The motor transmission component 5 outputs controllable torque to drive the planetary transmission system. Its frequency conversion speed regulation module precisely controls the angular velocity of the partition bearing mechanism 6 to match the processing requirements of waste sand with different particle sizes. Please see the appendix Figure 6 -Appendix Figure 8 The partitioned bearing mechanism 6 is located on the bottom frame 1. Together with the horizontal feed hopper 3 and the motor transmission component 5, it is used to continuously receive the foundry waste sand to be processed in a partitioned manner. At the same time, it forms an independent waste sand processing area and a waste discharge area distributed in an internal circle. The partitioned bearing mechanism 6 is embedded in the settling tank 2 and close to the horizontal feed hopper 3. The partitioned bearing mechanism 6 constitutes a dynamic processing unit. The inner nested tank 61 acts as a revolution carrier to drive the settling tank 62 to make planetary motion. The independent cavity of each settling tank 62 realizes the partitioned isolation treatment of waste sand. The slag discharge area between adjacent tanks forms a dedicated channel for magnetic impurities. The rotation trajectory of the feed channel 63 and the horizontal feed hopper 3 form a spatiotemporal intersection to realize discrete quantitative feeding. The tilt angle design of the mechanism makes the refined waste sand migrate to the docking plate 92 under the coupling of centrifugal force and gravity. Please see the appendix Figure 7 -Appendix Figure 8 The partitioned support mechanism 6 includes an inner nested tank 61 and a stationary receiving tank 62. The inner nested tank 61 is embedded and rotated within the inner wall of the stationary tank 2, and the stationary receiving tanks 62 are circumferentially distributed and fixed within the inner nested tank 61 to serve as the initial support structure for waste sand. Adjacent stationary receiving tanks 62 form a slag discharge area with the inner wall of the inner nested tank 61. The contact surfaces of the stationary receiving tanks 62 and the inner nested tank 61 are jointly provided with feed channels 63. The output port of the horizontal feed hopper 3 is located in all feed channels. On the displacement trajectory line of 63, the inner wall of the nested tank 61 forms a magnetic powder guiding surface, and its low friction coating promotes the sliding of iron powder. The wear-resistant lining of the stationary material receiving tank 62 resists the mechanical wear of the crushing blades 72. The arc-shaped design of the tank bottom optimizes the material flow trajectory. The inclined structure of the feed channel 63 accelerates the injection of waste sand. Its opening and closing state is automatically controlled by the rotation phase. The gradually expanding cross section of the slag discharge area reduces the probability of iron powder accumulation. The V-shaped cutting edge of the opposing stripping plate 65 realizes the full circumferential scraping of the magnetic sleeve 82. Please see the appendix Figure 7 -Appendix Figure 8 Side grooves 64 are distributed on both sides of the stationary material receiving tank 62, and drive the interior of the stationary material receiving tank 62 to connect with the slag discharge area of ​​the inner nested tank 61. The opposing stripping plate 65 has a V-shaped blade structure and is fixed in the center of the slag discharge area of ​​the inner nested tank 61. The side grooves 64 serve as magnetic powder transfer channels, and their elongated openings are distributed along the axial direction of the stationary material receiving tank 62 to form a continuous discharge interface. The size design of the groove ensures the balance between the iron powder throughput and the sand retention rate. The elastic pre-tightening structure of the opposing stripping plate 65 maintains a constant contact pressure with the magnetic suction sleeve 82. Its V-shaped double blade achieves bidirectional scraping. The polytetrafluoroethylene coating on the surface of the stripping plate reduces iron powder adhesion. The scraping angle is set so that the iron powder falls accurately into the slag discharge area.

[0022] Please see the appendix Figure 8 -Appendix Figure 9The auxiliary refining mechanism 7 is located on the bottom frame 1. It works with the central gear of the stationary tank 2 and the stationary material receiving tank 62 to rotate and contact the foundry waste sand and perform refining treatment. The auxiliary refining mechanism 7 consists of multiple sets, which are arranged in a circumferential distribution within the partitioned bearing mechanism 6. The auxiliary refining mechanism 7 generates high-intensity shearing force through planetary differential motion. The meshing transmission ratio between the traction gear 74 and the central gear is set to -2:1, so that the crushing blade 72 obtains a reverse angular velocity twice that of the revolution. The axe-shaped cutting edge of the crushing blade 72 splits and crushes the sand block. The wolf tooth structure of the refining blade 73 achieves particle grinding. The blade spacing decreases radially to form a progressive crushing intensity gradient. The material is ultra-finely processed under the coupling action of the centrifugal force of revolution and the impact force of the blade. Please see the appendix Figure 8 - Appendix Figure 9 The auxiliary refining mechanism 7 includes an embedded sleeve shaft 71, which is embedded and rotates within each set of inner nested tanks 61, extends out of the inner nested tanks 61 and enters the settling tank 2, and circumferentially surrounds the central gear of the settling tank 2. The portion of the embedded sleeve shaft 71 extending into the inner nested tank 61 is relatively fixed with crushing blades 72, which are located at both ends inside the inner nested tank 61. Refining blades 73 are fixedly distributed circumferentially between the crushing blades 72. The embedded sleeve shaft 71 serves as the torque transmission hub, and its hollow structure reduces rotational inertia. The spiral arrangement of the crushing blades 72 generates axial material flow to prevent bottom deposition. The serrated edges of the refining blades 73 generate high-frequency micro-cutting. The hard alloy weld overlay on the blade surface extends the wear resistance life. The sleeve shaft bearing system adopts a labyrinth seal to prevent iron powder intrusion. The blade angle adjustable design adapts to waste sand of different hardness. The dynamic balance module suppresses high-speed rotational vibration. Please see the appendix Figure 9 One end of the embedded sleeve shaft 71 extending into the settling tank 2 is fixed with a traction gear 74, and all traction gears 74 are meshed around the central gear key of the settling tank 2. The traction gear 74 converts the revolution energy of the planetary carrier into its own rotation energy. Its tooth profile parameters are optimized for high torque conditions, and the tooth surface nitriding treatment improves the resistance to pitting corrosion. The phase synchronization design of the gear set ensures that the crushing intensity is equal in each settling tank 62. The lubrication oil circuit is integrated into the gear web to achieve continuous lubrication at the meshing point. The overload shear pin disconnects the transmission chain when a metal foreign object enters, protecting the core gear system.

[0023] Please see the appendix Figure 9 - Appendix Figure 10The auxiliary iron removal mechanism 8 is located on the bottom frame 1. It works with the stationary toothed ring, side groove 64 and opposing stripping plate 65 of the stationary tank 2 to remove iron from the waste sand during the refining process. At the same time, it separates the waste sand. The auxiliary iron removal mechanism 8 is also set in the partitioned bearing mechanism 6 in a circumferentially distributed form. The auxiliary iron removal mechanism 8 realizes the dynamic adsorption and stripping of iron powder. The rotation of the sealing roller 81 drives the magnetic suction sleeve 82 to form a moving magnetic field. Its surface magnetic flux density gradient design realizes selective adsorption. The neodymium iron boron permanent magnet array of the magnetic suction sleeve 82 generates a radial magnetic field. Non-magnetic sand particles are separated under the action of centrifugal force, while iron powder is captured by magnetic force. The alternating arrangement of magnetic poles enhances the magnetic field stirring effect and prevents iron powder from agglomerating. The ceramic bearing of the sealing roller 81 is resistant to high temperature environment. Please see the appendix Figure 9 -Appendix Figure 10 The auxiliary iron removal mechanism 8 includes a sealing roller 81, which is embedded in the outer wall of the stationary material receiving tank 62 and adheres to the feed channel 63 on the outside of the stationary material receiving tank 62. A magnetic sleeve 82 is sleeved on the outside of the sealing roller 81, and the inner sides of the sealing roller 81 and the magnetic sleeve 82 are simultaneously embedded in the stationary material receiving tank 62 along the feed channel 63. The end of the opposing peeling plate 65 adheres to the surface of the magnetic sleeve 82 to form a scraping state. The cam surface of the sealing roller 81 forms a dynamic seal with the feed channel 63 to prevent sand leakage. The magnetic sleeve 82 adopts a multi-layer composite structure. The outer stainless steel sheath ensures wear resistance, the inner magnetic cavity maintains constant temperature, the array design of the magnetic sleeve 82 enhances the magnetic field strength of the working surface, the back magnetic field cancellation technology reduces magnetic interference, and the rotating magnetic field causes the iron powder to be oriented along the magnetic lines of force, improving the adsorption efficiency. Please see the appendix Figure 10 One end of the sealing roller 81 extends out of the inner nested tank 61 and surrounds the inside of the stationary toothed ring of the stationary tank 2. A traction gear 83 is fixed at this end. The traction gear 83 meshes around the inner tooth key of the stationary toothed ring of the stationary tank 2. The traction gear 83 obtains a precise speed ratio through the meshing of the stationary toothed ring. Its dual-module tooth profile is adapted to large center distance transmission. The tooth tip trimming reduces impact noise. The axial floating design of the gear compensates for installation errors. The magnetic encoder monitors the speed phase in real time. The speed matching between the transmission system and the magnetic sleeve 82 ensures the synchronization of the iron powder adsorption-stripping cycle. The forced air cooling system of the gearbox maintains thermal balance.

[0024] Please see the appendix Figure 11 -Appendix Figure 12The centralized heating mechanism 9 is located on the bottom frame 1 and works with the static material receiving tank 62 to heat the iron-removed and refined waste sand. The centralized heating mechanism 9 is embedded in the inner tank 4. The centralized heating mechanism 9 realizes the spiral propulsion thermal regeneration of the material. The porous structure of the inner filter tube 91 forms a hot air infiltration channel. Its pore size distribution meets the requirements of airflow and sand particle retention. The rotating sealing interface of the docking plate 92 adopts a labyrinth-type air seal to reduce heat leakage. The variable pitch design of the spiral conveyor 93 extends the residence time in the high temperature zone. The aluminum coating layer on the blade surface enhances the heat reflection efficiency. The temperature field forms a three-stage distribution of preheating-main heating-slow cooling along the axial direction. Please see the appendix Figure 11 -Appendix Figure 12 The centralized hot drying mechanism 9 includes an embedded filter tube 91, which is embedded and rotated inside the embedded tank 4. The embedded filter tube 91 extends to the inner end of the embedded tank 4 and is fixed with a docking plate 92. The docking plate 92 is provided with circumferentially distributed through holes corresponding to the number of stationary material receiving tanks 62, and is fixed to the corresponding stationary material receiving tanks 62. The docking plate 92 also closes the inner port of the embedded tank 4. A spiral conveying channel 93 is fixed around the outside of the embedded filter tube 91 and is attached to the inner wall of the embedded tank 4. The sintered metal filter element of the embedded filter tube 91 realizes gas-solid separation, and its gradient pore structure realizes graded filtration. The ribbon blades of the spiral conveying channel 93 form a thin material layer thermal contact with the tank wall. The open structure of the blades promotes the penetration of hot air. The material undergoes continuous tumbling during spiral propulsion, realizing three-dimensional uniform heating. Please see the appendix Figure 12 An adsorption fan 94 is installed at the outer output end of the embedded filter tube 91. The adsorption fan 94 establishes a negative pressure driven heat exchange system. Its variable frequency centrifugal fan generates adjustable suction force, and the venturi flow meter accurately controls the exhaust rate. The hot air is converted into turbulent flow in the micropores of the filter tube through the laminar flow transition section, which enhances the pollutant carrying capacity. The cyclone separator is designed to capture dust in the front, and the condensation module recovers volatile organic compounds.

[0025] Based on the above technical solution, embodiments of the present invention also provide a working principle for an integrated treatment device for the recycling and reuse of foundry waste sand, including the following: Initial feed and intermittent quantitative receiving The foundry waste sand to be processed is first fed into the equipment through a horizontal feed hopper 3, which is fixedly installed on top of an inclined settling tank 2. A partitioned support mechanism 6 is located inside the settling tank 2 and is driven to rotate continuously by a motor drive 5. The partitioned support mechanism 6 consists of a large inner tank 61 and multiple smaller settling tanks 62 evenly distributed within it. Adjacent settling tanks 62, together with the inner wall of the inner inner tank 61, form a slag discharge area. Each settling tank 62 has a feed channel 63 at its contact surface with the inner inner tank 61. The output port of the horizontal feed hopper 3 is precisely aligned with the rotation trajectory of these feed channels 63. When the motor drive 5 drives the partitioned support mechanism 6 to rotate... The inner nested tank 61 and its internal stationary receiving tank 62 rotate as a whole. As they rotate, the feed channels 63 on each stationary receiving tank 62 pass under the output port of the horizontal feed hopper 3 in sequence. During the brief moment when the feed channel 63 aligns with the output port of the horizontal feed hopper 3, the waste sand falls into the feed channel 63 by gravity and enters the corresponding stationary receiving tank 62. Due to the continuous rotation of the partitioned bearing mechanism 6, this alignment is intermittent. Therefore, the process of each stationary receiving tank 62 receiving waste sand is intermittent and quantitative. Once the feed channel 63 rotates away from under the horizontal feed hopper 3, the feeding stops until the feed channel 63 of the next stationary receiving tank 62 rotates into place. Waste sand crushing and refining treatment The stationary receiving tank 62, which receives a fixed amount of waste sand, moves with the rotation of the partitioned bearing mechanism 6. Inside the stationary receiving tank 62, an auxiliary refining mechanism 7 is installed. The auxiliary refining mechanism 7 mainly includes an embedded sleeve shaft 71, crushing blades 72, and refining blades 73. The embedded sleeve shaft 71 is embedded in and rotatably connected to the stationary receiving tank 62, i.e., the small tank body. One end of the sleeve shaft extends out of the inner nested tank 61 and enters the stationary tank 2. Inside the stationary tank 2, a traction gear 74 is fixed to the extended end. All the traction gears 74 surround and mesh with the central gear fixed to the inner wall of the stationary tank 2. When the partitioned bearing mechanism 6 is driven to rotate by the motor transmission component 5, the entire mechanism, including the stationary receiving tank 62 and the auxiliary refining mechanism 7 inside it, revolves around the central axis of the stationary tank 2, i.e., in a circle. Displacement occurs because the traction gear 74 meshes with the stationary central gear. The revolution of the partitioned bearing mechanism 6 forces the traction gear 74 to rotate. Since the central gear is fixed, this meshing relationship causes the rotation direction of the traction gear 74 to be opposite to the revolution direction of the partitioned bearing mechanism 6. The reverse rotation of the traction gear 74 drives the embedded sleeve shaft 71 to rotate in the opposite direction within the stationary material receiving tank 62 at its installation position. The crushing blades 72 fixed on the embedded sleeve shaft 71, located at both ends inside the stationary material receiving tank 62, and the refining blades 73, circumferentially distributed between the two crushing blades 72, also rotate in the opposite direction at high speed. At the same time, the stationary material receiving tank 62 itself also revolves with the partitioned bearing mechanism 6. Therefore, the waste sand material in the stationary material receiving tank 62 is subjected to the combined effect of the two movements: Revolutionary motion: The circumferential displacement of the stationary material receiving tank 62 causes the waste sand to continuously tumble and mix inside the tank; Reverse rotation refining: The high-speed reverse rotation of the crushing blades 72 and refining blades 73 exerts strong impact, shearing and grinding forces on the tumbling waste sand. The crushing blade 72 is mainly responsible for initially breaking down and crushing larger sand blocks or clumps, while the refining blade 73 is responsible for further grinding, making the waste sand particles smaller and more uniform. The material tumbling caused by the revolution ensures that all sand particles can be fully exposed within the range of action of the rotating blades, while the high-speed reverse rotation of the blades provides powerful crushing energy. The combination of these two movements forces the waste sand in the stationary receiving tank 62 to be fully crushed and refined during the movement. Simultaneous adsorption and separation of ferromagnetic impurities While the waste sand is being crushed and refined, the separation of ferromagnetic impurities, mainly iron powder and iron filings, is also carried out simultaneously. This function is accomplished by the auxiliary iron removal mechanism 8, which is also installed on each stationary material receiving tank 62. The auxiliary iron removal mechanism 8 mainly includes a sealing roller 81 and a magnetic sleeve 82. The sealing roller 81 is embedded in the outer wall of the stationary material receiving tank 62 and fits along the feed channel 63 on the outside of the stationary material receiving tank 62 to provide a sealing effect. The magnetic sleeve 82 is sleeved on the outside of the sealing roller 81. The inner parts of the sealing roller 81 and the magnetic sleeve 82 are simultaneously embedded into the interior of the stationary material receiving tank 62 along the feed channel 63, so that their magnetic surfaces can contact the material inside the tank. One end of the sealing roller 81 also extends out of the inner nested tank 61. The material enters the settling tank 2, where a traction gear 83 is fixed. All traction gears 83 surround and mesh with the inner teeth of the settling gear ring fixed to the inner wall of the settling tank 2. Since the sealing roller 81 is fixed to the settling support tank 62, it will revolve and move in a circular motion with the settling support tank 62. At the same time, the traction gears 83 mesh with the stationary settling gear ring. The revolution of the partitioned support mechanism 6 will force the traction gears 83 to rotate, thereby driving the sealing roller 81 and the magnetic sleeve 82 sleeved on it to rotate inside the settling support tank 62. The rotating magnetic sleeve 82 has a magnetic surface. When it rotates inside the settling support tank 62, it will attract the ferromagnetic material that has been crushed and exposed in the waste sand. Iron powder impurities are attracted to the magnetic sleeve 82 as it rotates within the settling tank 62 and as the settling tank 62 revolves. The iron powder impurities adsorbed on the surface of the magnetic sleeve 82 are gradually drawn and moved towards the outer wall of the settling tank 62, closer to the inner nested tank 61. Side grooves 64 are distributed on both sides of the settling tank 62, connecting the interior of the settling tank 62 with the slag discharge area of ​​the inner nested tank 61. When the iron powder impurities adsorbed by the magnetic sleeve 82 rotate and move to the tank wall and pass through the side grooves 64, they are transferred from the interior of the settling tank 62 to the slag discharge area of ​​the inner nested tank 61. At the center of the slag discharge area, a fixedly installed opposing stripping plate 65 is positioned. 65 is a V-shaped blade structure, the end of which is precisely attached to the outer surface of the magnetic sleeve 82 on one side of the slag discharge area. When the magnetic sleeve 82 carries iron powder impurities and rotates past the opposing stripping plate 65, the cutting edge of the opposing stripping plate 65 scrapes off the iron powder impurities adsorbed on the surface of the magnetic sleeve 82. The scraped iron powder impurities fall into the slag discharge area. Since the entire partition bearing mechanism 6 is in an inclined state, which is determined by the inclined installation of the settling tank 2, and the bottom of the side wall of the settling tank 2 is provided with a slag discharge trough, which is located between the partition bearing mechanism 6 and the inner tank 4, the iron powder slag that falls into the slag discharge area moves down along the inclined slag discharge area under the action of gravity, and is finally discharged out of the equipment through the slag discharge trough at the bottom of the settling tank 2. Refine the transfer and heat treatment of waste sand after iron removal After crushing, refining, and iron impurity separation, the waste sand material, mainly composed of sand particles, remains in the stationary receiving tank 62. As the partitioned bearing mechanism 6 continues to rotate, each stationary receiving tank 62 eventually moves to a position where it docks with the centralized heating mechanism 9. The centralized heating mechanism 9 is installed inside the embedded tank 4 and mainly consists of an embedded filter tube 91, a docking plate 92, a spiral conveyor channel 93, and an adsorption fan component 94. The embedded filter tube 91 is rotatably embedded into the embedded tank 4, and the docking plate 92 is fixed at one end of the filter tube 91 that extends into the inner side of the embedded tank 4 near the partitioned bearing mechanism 6. The docking plate 92 has circumferentially distributed through holes, the number and position of which correspond one-to-one with the stationary material receiving tank 62. When the partitioned bearing mechanism 6 rotates to a specific angle, the discharge port of the stationary material receiving tank 62 aligns with the corresponding through holes on the docking plate 92 and they are fixed together. At this time, the docking plate 92 also closes the inner port of the embedded tank 4. After the stationary material receiving tank 62 is docked with the docking plate 92, the processed waste sand in the stationary material receiving tank 62 falls into the inlet end of the embedded filter tube 91 through the through holes of the docking plate 92 under the action of gravity, and is concentrated for heat drying. Mechanism 9 is fixed to the stationary material receiving tank 62 via its connecting structure docking plate 92 and rotates together with the partitioned bearing mechanism 6. After the waste sand enters the embedded filter tube 91, the heat treatment begins: a spiral conveyor channel 93 is fixed around the outer wall of the embedded filter tube 91 and is tightly attached to the inner wall of the embedded tank 4. As the centralized heat treatment mechanism 9 rotates with the partitioned bearing mechanism 6, the embedded filter tube 91 and the spiral conveyor channel 93 rotate together. The waste sand falling into the embedded filter tube 91 is captured by the rotating spiral conveyor channel 93. The spiral structure of the spiral conveyor channel 93 removes the waste sand. The sand is conveyed from the inside to the outside along the length of the embedded filter tube 91. During this conveying process, the waste sand is continuously picked up, thrown, and turned over by the spiral blades. Heating elements are installed around the inner circumference of the side wall of the embedded tank 4. The rotating spiral conveyor 93 continuously conveys the waste sand to its edge, which is in close contact with the inner wall of the embedded tank 4. Therefore, the waste sand is in constant contact with the inner wall of the embedded tank 4 during the conveying and turning process. When in contact, the heat generated by the heating elements in the wall of the embedded tank 4 is directly conducted to the waste sand through the tank wall to heat it. Thorough heating: The waste sand material undergoes the entire conveying path from the inlet end to the outlet end within the spiral conveyor 93. In this relatively long path, the waste sand material is repeatedly turned over and stirred, and continuously and thoroughly contacted with the heated tank wall. This heating process effectively bakes the surface of the waste sand particles, removing the residual binders, organic matter or other contaminants attached to them. Hot air discharge: During the hot drying process, the hot air generated by heating contains volatile pollutants that need to be discharged. The embedded filter tube 91 itself has a breathable filter tube structure. At the outer output end of the centralized hot drying mechanism 9, away from the docking plate 92, an adsorption fan 94 is provided. The adsorption fan 94 generates a negative pressure suction force. This suction force acts on the inside of the embedded filter tube 91 to form a negative pressure environment. The hot air generated by the hot drying passes through the tube wall of the embedded filter tube 91 and is drawn into the cavity channel inside the embedded filter tube 91. Under the action of negative pressure, this hot air is drawn away by the adsorption fan 94 along the cavity channel inside the embedded filter tube 91 and discharged outside the equipment. Regenerated sand discharge: After being thoroughly heated and having its surface residue removed, the regenerated sand is conveyed by the spiral conveyor 93 and finally reaches the outer output end of the embedded filter tube 91. Since the entire equipment is in an inclined state, the regenerated sand can be collected by gravity or subsequent conveying equipment after being discharged at the output end, thus completing the entire regeneration process.

[0026] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An integrated treatment equipment for recycling and reusing foundry waste sand, characterized in that, include: The bottom frame (1) is used to fix the structure of the integrated treatment equipment for the recycling and reuse of foundry waste sand. The settling tank (2) is located on the bottom frame (1) and supports all the foundry waste sand recycling structures in an inclined manner; The horizontal feed hopper (3) is located on the settling tank (2) and is used to input the foundry waste sand to be processed; The embedded tank (4) is located on the settling tank (2) and is used in conjunction with the settling tank (2) to receive the refined iron removal casting waste sand and perform heat treatment; The motor drive component (5) is located on the settling tank (2) and is used to generate the driving torque for the entire waste sand rotation process; The partitioned bearing mechanism (6) is located on the bottom frame (1), and works with the horizontal feed hopper (3) and motor transmission component (5) to continuously receive the foundry waste sand to be processed in a partitioned manner, while forming an independent waste sand processing area and a waste discharge area distributed in the internal circumference. The auxiliary refining mechanism (7) is located on the bottom frame (1) and works with the central gear of the stationary tank (2) and the stationary material receiving tank (62) to rotate and contact the foundry waste sand and perform refining treatment. The auxiliary iron removal mechanism (8) is located on the bottom frame (1) and works with the stationary toothed ring, side groove (64) and opposing stripping plate (65) of the stationary tank (2) to remove iron from the waste sand during the refining process and separate it at the same time. The centralized heating unit (9) is located on the bottom frame (1) and is used in conjunction with the static material receiving tank (62) to heat the iron-removed and refined waste sand.

2. The integrated treatment equipment for recycling and reusing foundry waste sand according to claim 1, characterized in that, The settling tank (2) is fixed to the top of the base frame (1) in an inclined manner, and the inclined bottom end is an open structure. The settling gear ring and the central gear structure are fixed to the top of the settling tank (2) in an inclined state and are in a coaxial state. The horizontal feed hopper (3) is fixed to the inclined top surface of the settling tank (2). The inner tank (4) is embedded and fixed inside the settling tank (2) and protrudes along the open structure of the settling tank (2). At the same time, heating elements are distributed circumferentially on the side wall of the inner tank (4). The motor conductor (5) is located at the end of the settling tank (2) away from the inner tank (4). The partitioned bearing mechanism (6) is embedded in the settling tank (2) and close to the horizontal feed hopper (3). The bottom of the side wall of the settling tank (2) is provided with a slag discharge trough, which is placed between the partitioned bearing mechanism (6) and the inner tank (4) to discharge the iron powder slag separated by the partitioned bearing mechanism (6). The auxiliary refining mechanism (7) consists of multiple sets, which are arranged in a circumferential distribution in the partitioned bearing mechanism (6). The auxiliary iron removal mechanism (8) is also arranged in a circumferential distribution in the partitioned bearing mechanism (6). The centralized heat drying mechanism (9) is embedded in the inner tank (4).

3. The integrated treatment equipment for recycling and reusing foundry waste sand according to claim 1, characterized in that, The partitioned bearing mechanism (6) includes an inner nested tank (61) and a stationary material receiving tank (62). The inner nested tank (61) is embedded and rotated on the inner wall of the stationary tank (2), and the stationary material receiving tank (62) is circumferentially distributed and fixed inside the inner nested tank (61) to serve as the initial bearing structure for waste sand. The adjacent stationary material receiving tanks (62) and the inner wall of the inner nested tank (61) form a slag discharge area. The contact surfaces of the stationary material receiving tank (62) and the inner nested tank (61) are jointly provided with a feed channel (63). The output port of the horizontal feed hopper (3) is placed on the displacement trajectory line of all feed channels (63).

4. The integrated treatment equipment for recycling and reusing foundry waste sand according to claim 1, characterized in that, The auxiliary refining mechanism (7) includes an embedded sleeve shaft (71) which is embedded and rotated in each set of inner nested tanks (61), while extending out of the inner nested tanks (61) and entering into the stationary tank (2), while circumferentially surrounding the central gear of the stationary tank (2), and the portion of the embedded sleeve shaft (71) extending into the inner nested tank (61) is relatively fixed with crushing blades (72), while located at both ends inside the inner nested tank (61), and refining blades (73) are fixedly distributed circumferentially between the crushing blades (72).

5. The integrated treatment equipment for recycling and reusing foundry waste sand according to claim 1, characterized in that, The auxiliary iron removal mechanism (8) includes a sealing roller (81), which is embedded in the outer wall of the stationary material receiving tank (62) and attached to the feed channel (63) on the outside of the stationary material receiving tank (62). A magnetic sleeve (82) is sleeved on the outside of the sealing roller (81), and the inner side of the sealing roller (81) and the magnetic sleeve (82) are simultaneously embedded in the stationary material receiving tank (62) along the feed channel (63). The end of the opposing stripping plate (65) is attached to the surface of the magnetic sleeve (82) to form a scraping state.

6. The integrated treatment equipment for recycling and reusing foundry waste sand according to claim 1, characterized in that, The centralized heating mechanism (9) includes an embedded filter tube (91), which is embedded and rotated inside the embedded tank (4). The embedded filter tube (91) extends to the inner end of the embedded tank (4) and is fixed with a docking plate (92). The docking plate (92) is provided with circumferentially distributed through holes corresponding to the number of stationary material receiving tanks (62), and is fixed to the corresponding stationary material receiving tanks (62). The docking plate (92) also closes the inner port of the embedded tank (4). The outer side of the embedded filter tube (91) is surrounded and fixed with a spiral conveying channel (93), and the spiral conveying channel (93) is attached to the inner wall of the embedded tank (4).

7. The integrated treatment equipment for recycling and reusing foundry waste sand according to claim 3, characterized in that, The side grooves (64) are distributed on both sides of the stationary material receiving tank (62) and drive the interior of the stationary material receiving tank (62) to communicate with the slag discharge area of ​​the inner nested tank (61). The opposing peeling plate (65) is a V-shaped blade structure and is fixed at the center of the slag discharge area of ​​the inner nested tank (61).

8. The integrated treatment equipment for recycling and reusing foundry waste sand according to claim 4, characterized in that, The embedded sleeve shaft (71) extends into the settling tank (2) and is fixed with a traction gear (74) at one end, and all traction gears (74) are meshed around the central gear key of the settling tank (2).

9. The integrated treatment equipment for recycling and reusing foundry waste sand according to claim 5, characterized in that, One end of the sealing roller (81) extends out of the inner nested tank (61) and surrounds the inside of the stationary toothed ring of the stationary tank (2). A traction gear two (83) is fixed at this end, and the traction gear two (83) meshes around the inner toothed key of the stationary toothed ring of the stationary tank (2).

10. The integrated treatment equipment for recycling and reusing foundry waste sand according to claim 6, characterized in that, An adsorption fan (94) is provided at the outer output end of the embedded filter tube (91).

Images