A nut processing floatation machine

Abstract

The present application relates to nut floatation technical field, and disclose a kind of floatation machine for nut processing, including floatation box, fixedly connected on the water inlet and water outlet of floatation box, the conveying mesh belt for conveying sinking nut is installed in the floatation box, the pusher for driving the reciprocating lifting of filter press plate is set in the present application, and filter press plate repeatedly rises and falls in the process of floatation, periodic downward pressure is exerted to nut and impurity floating on water surface, and full nut is re-immersed in water under the forced pushing of filter press plate due to surface wax layer hydrophobic or bubble adhesion, and fully contact with water body, accelerate surface wetting and bubble separation process, while the lifting movement of filter press plate forms local water flow disturbance in liquid surface area, help to separate high-quality nut from impurities, which originally adhered to branch and leaf impurities, to avoid the technical defects that high-quality fruit is misarranged with floating material, significantly improve the recovery rate of high-quality nut.

Description

Technical Field

[0001] This invention relates to the field of nut flotation technology, specifically to a flotation machine for nut processing. Background Technology

[0002] In the nut processing industry, flotation technology is widely used in the quality sorting and impurity removal of nuts due to its simple operation and low cost. The basic principle of flotation is as follows: the nuts to be processed are put into a flotation tank filled with clean water. Plump and high-quality nuts sink to the bottom of the tank due to their higher density, while empty shells, shriveled nuts, insect-damaged nuts, and light impurities such as branches and leaves float on the surface of the liquid due to their lower density. Operators separate and remove the floating objects using equipment such as nets, while the high-quality nuts that sink to the bottom are discharged and collected by the lifting mechanism, thereby achieving separation of superior and inferior products and preliminary purification.

[0003] In the prior art, in order to realize the continuous operation of the above flotation process, various flotation equipment with different structural forms have been developed. Typical equipment configuration usually includes flotation tank and conveyor belt. During operation, the nut material is put into the flotation tank and the stratification is completed under the combined action of gravity and buoyancy. The high-quality nuts that sink to the bottom are received by the horizontal section of the mesh belt and transported to the surface of the liquid along the inclined lifting section, while the inferior fruits and impurities that float are skimmed off.

[0004] However, the aforementioned equipment has significant limitations when processing nuts with naturally hydrophobic shells (such as pine nuts). The surface of pine nuts is covered with a dense waxy layer or a hydrophobic film. This film structure results in low surface tension, making it difficult for the surface to be fully wetted when immersed in water. The water film cannot spread effectively. Furthermore, small nuts like pine nuts are relatively light. Even if the kernels are plump and denser than water, the interfacial tension between the surface film and the water, coupled with the possibility of air bubbles adhering to the shell surface during immersion, causes pine nuts to remain on the surface for a considerable period due to the upward component of surface tension in the initial stage of flotation. This results in a floating state similar to empty or shriveled nuts. This phenomenon makes it difficult to distinguish between inferior nuts that need to be removed and high-quality nuts that are mistakenly floating due to the lack of surface wettability when retrieval of floating objects. Consequently, high-quality nuts are removed, resulting in a serious waste of high-quality fruits. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a flotation machine for nut processing, aiming to solve the problem of high-quality nuts being mistakenly floated due to the hydrophobic properties of the nut surface in existing flotation equipment.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a flotation machine for nut processing, comprising a flotation tank, an inlet and an outlet fixedly connected to the flotation tank, a conveyor belt for conveying sinking nuts installed inside the flotation tank, multiple rubber plates fixedly installed at equal intervals on the outer side of the conveyor belt, a fixed frame fixedly installed at the upper end of the flotation tank, a feeding assembly fixedly installed on the fixed frame, a filter press plate arranged above the flotation tank, pushers for controlling the lifting and lowering of the filter press plate arranged on both sides of the flotation tank, an agitator rotatably installed inside the flotation tank, a connecting member arranged between the pusher and the agitator, a collection box for collecting floating nuts arranged inside the flotation tank, a sealing member arranged on one side of the collection box, and the pusher, when controlling the lifting and lowering of the filter press plate, also driving the sealing member to close or open one side of the collection box.

[0007] Preferably, the pushing component includes an electric push rod fixedly installed on one side of the flotation tank, a connecting rod fixedly installed on the upper end of the electric push rod, sliding openings through both sides of the fixing frame, and sliding rods fixedly installed on both sides of the filter press plate and slidably connected to the corresponding sliding openings. The two sliding rods are fixedly connected to the connecting rods corresponding to the positions.

[0008] Preferably, the agitator includes a rotating shaft rotatably connected to the flotation tank, and a plurality of agitating plates are fixedly installed on the periphery of the rotating shaft.

[0009] Preferably, the connector includes a sawtooth block fixedly installed at the lower end of the connecting rod, and both ends of the rotating shaft penetrate the flotation tank and are fixedly installed with toothed rods that mesh with the sawtooth block.

[0010] Preferably, the feeding assembly includes a rectangular housing fixedly mounted on a fixed frame, with a feeding funnel fixedly connected to the upper end of the rectangular housing, an opening extending through the upper end of the filter plate, a filter screen being rotatably mounted in the opening via a spring shaft, and a connecting frame slidably disposed on the outer side of the rectangular housing and fixedly connected to the filter plate.

[0011] Preferably, the conveyor belt is horizontally positioned at one end and inclined at the other end within the flotation tank. A screen plate is fixedly installed on the flotation tank, and the screen plate is located on one side of the inclined section of the conveyor belt.

[0012] Preferably, the collection box includes an inclined plate fixedly installed on one side of the flotation box, and a baffle is fixedly installed on one side of the inclined plate. The inclined plate, the baffle, and the side wall of the flotation box form a collection cavity for collecting nuts and impurities that float during flotation. An inlet is provided at the upper end of the baffle.

[0013] Preferably, the lower end of the inclined plate has a connection port, a filter plate is fixedly installed in the connection port, a fixed housing communicating with the connection port is fixedly installed at the lower end of the inclined plate, and a pipe interface is fixedly connected to one side of the fixed housing.

[0014] Preferably, the sealing element includes a support rod fixedly installed at one end of the filter press plate, a sealing plate for sealing the liquid inlet is provided on one side of the baffle, the sealing plate is in sliding contact with one side of the baffle, the sealing plate is fixedly connected to the support rod, the sealing plate is divided into an upper plate and a lower plate, and there is a gap between the filter press plate and the sealing plate.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. This invention, by setting up a filter press plate and a driving component to reciprocate the lifting and lowering of the filter press plate, controls the repeated lifting and lowering of the filter press plate during the flotation process. This applies periodic downward pressure to the nuts and impurities floating on the water surface, causing plump nuts that have been mistakenly floating due to the hydrophobic surface wax layer or the adhesion of air bubbles to be forcibly pushed back into the water by the filter press plate. This allows them to fully contact the water and accelerates the surface wetting and air bubble removal process. At the same time, the lifting and lowering motion of the filter press plate creates local water flow disturbance in the liquid surface area, which helps to separate the high-quality nuts that were originally attached to branches and leaves from the impurities. This avoids the technical defect of high-quality nuts being mistakenly discharged with floating matter and significantly improves the recovery rate of high-quality nuts.

[0016] 2. This invention utilizes a linkage connector consisting of a serrated block and a toothed rod between the filter press plate and the agitator plate. During the lifting and lowering of the filter press plate driven by the electric actuator, the serrated block at the lower end of the connecting rod drives the toothed rod, which is fixedly connected to the rotating shaft, to reciprocate in both directions. This allows a single power source to simultaneously drive the filter press plate to perform a pressing action and the agitator plate to perform a rotating and turning action. During rotation, the agitator plate continuously turns over the nut accumulation layer deposited on the conveyor belt, effectively releasing inferior nuts, empty shells, and impurities mixed in with the high-quality nuts and causing them to float to the surface. At the same time, the reciprocating pressing of the filter press plate promptly pushes the high-quality nuts that have floated up again due to agitation back into the water. The timing and synergistic effect of these two actions achieve the technical effect of improving the efficiency of impurity release within the accumulation layer while effectively preventing the secondary floating of high-quality nuts.

[0017] 3. This invention features a collection box enclosed by an inclined plate, a baffle, and the side wall of the flotation chamber. An inlet located below the liquid surface is opened at the upper end of the baffle. A linkage seal consisting of a support rod and a sealing plate is installed between the filter press plate and the inlet. When the filter press plate is below the liquid surface during flotation, the upper plate of the sealing plate keeps the inlet sealed, preventing water flow disturbance during flotation from prematurely bringing in high-quality flakes that have not yet fully wetted and settled into the collection box. When flotation ends and the filter press plate rises above the liquid surface, the sealing plate moves upward to open the inlet, creating a natural hydraulic slope. Surface floating matter is then directed into the collection box by the water flow, achieving centralized and orderly collection of floating matter after flotation. Attached Figure Description

[0018] Figure 1This is a schematic diagram of the overall three-dimensional structure of the present invention; Figure 2 This is a schematic diagram of the overall three-dimensional cross-sectional structure of the present invention; Figure 3 for Figure 2 A magnified structural diagram of A in the middle; Figure 4 This is a schematic diagram of the connection structure between the pusher and the agitator of the present invention; Figure 5 for Figure 4 A magnified structural diagram of B in the diagram; Figure 6 This is a three-dimensional structural diagram of the filter press plate of the present invention.

[0019] In the diagram: 1. Flotation tank; 2. Conveyor belt; 3. Inlet; 4. Outlet; 5. Gel plate; 6. Screen plate; 7. Filter press plate; 8. Sealing plate; 9. Electric actuator; 10. Fixing frame; 11. Feed funnel; 12. Pipe interface; 13. Fixed shell; 14. Liquid inlet; 15. Baffle; 16. Filter plate; 17. Inclined plate; 18. Stirring plate; 19. Sliding port; 20. Support rod; 21. Connecting rod; 22. Sawtooth block; 23. Toothed rod; 24. Rotating shaft; 25. Opening; 26. Sliding rod; 27. Rectangular shell; 28. Connecting frame; 29. ​​Filter screen; 801. Upper plate; 802. Lower plate. Detailed Implementation

[0020] The embodiments of this disclosure will be further described in detail below with reference to the accompanying drawings and examples. The detailed description of the embodiments and the accompanying drawings are used to illustrate the principles of this disclosure by way of example, but should not be used to limit the scope of this disclosure. This disclosure can be implemented in many different forms and is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

[0021] Please see Figures 1-6A flotation machine for nut processing includes a flotation tank 1, an inlet 3 and an outlet 4 fixedly connected to the flotation tank 1 (the inlet 3 is connected to an external water injection device, and a water level detection device can be installed inside the flotation tank 1 to facilitate timely water replenishment through the inlet 3). A conveyor belt 2 for conveying sinking nuts is installed inside the flotation tank 1. One end of the conveyor belt 2 is horizontally positioned inside the flotation tank 1, and the other end is inclined. It should be noted that the conveyor belt 2 and its related control equipment in this solution adopt existing mature technologies; therefore, its specific structure and control principle will not be elaborated upon in this embodiment. Multiple rubber plates 5 are fixedly installed at equal intervals on the outer side of the conveyor belt 2. A fixing frame 10 is fixedly installed at the upper end of the flotation tank 1, and a feeding assembly is fixedly installed on the fixing frame 10. A filter press 7 is installed above the flotation tank 1, and control filter presses are installed on both sides of the flotation tank 1. The lifting and lowering pusher of plate 7 feeds nuts into flotation tank 1 via the feeding assembly. Most of the high-quality nuts sink to the water due to their higher density and accumulate on the horizontal section of conveyor belt 2. However, some high-quality nuts float on the water surface along with inferior nuts and impurities such as branches and leaves because their outer shells are not fully wetted by the water or because air bubbles are attached to their surface. At this time, the pusher is activated to drive the filter plate 7 to move up and down repeatedly, pressing the nuts and impurities floating on the liquid surface back into the water. During this reciprocating motion, the water flow is disturbed, which effectively breaks the air bubbles attached to the outer shells of the high-quality nuts, allowing their surface to fully contact the water and accelerate wetting and sinking. On the other hand, the pushing of the filter plate 7 also causes the nuts to sway slightly in the water, which helps to separate the high-quality nuts that were originally stuck with impurities and leaves from the debris, thereby reducing the probability of high-quality nuts being mistakenly discharged with floating matter and improving the purity of flotation separation and the recovery rate of high-quality nuts. This design also includes a rotatable agitator installed inside the flotation tank 1. The agitator and the pusher are linked and coordinated via a connector. The agitator includes a rotating shaft 24 rotatably connected to the flotation tank 1. Multiple agitator plates 18 are fixedly installed around the circumference of the rotating shaft 24. To actively agitate the high-quality flotation material accumulated on the conveyor belt 2, the rotating shaft 24 drives the agitator plates 18 to rotate, effectively breaking up the accumulated layer and preventing some inferior flotation material and impurities from being mixed in with and buried among the high-quality flotation material at the bottom, thus improving the purity of the bottom material. Simultaneously, to prevent rigid interference between the agitator plates 18 and the outer rubber plate 5 of the conveyor belt 2 during rotation, the rubber plate 5 is made of a deformable material. When the agitator plates 18 rotate to contact the rubber plate 5, the rubber plate 5 can elastically... The deformation and automatic reset after passing the agitator 18 ensure that the movement of the two does not interfere with each other, thus ensuring the safety and stability of the equipment operation (a screen plate 6 is fixedly installed on the flotation tank 1. The screen plate 6 is located on one side of the inclined section of the conveyor belt 2. The screen plate 6 is used to block the floating objects remaining on the liquid surface during material conveying, so as to prevent the inclined section of the conveyor belt 2 from carrying away the remaining floating objects when conveying materials). In addition, the feeding assembly includes a rectangular shell 27 fixedly installed on the fixed frame 10. The upper end of the rectangular shell 27 is fixedly connected to the feeding funnel 11. The rotating shaft 24 is set directly below the feeding funnel 11, so that when the material falls from the feeding funnel 11, it can fall directly into the area where the agitator 18 is located. With the help of the rotation of the agitator 18, the material is quickly dispersed and pushed to the surroundings. Based on the above structure, the present solution further provides a collection box in the flotation tank 1 for collecting floating nuts and impurities, and a sealing member is disposed on one side of the collection box. To realize the linkage control between the lifting motion of the filter press plate 7 and the opening / closing state of the collection box, the pushing member, while driving the filter press plate 7 to move up and down, further drives the sealing member through a transmission relationship to close or open one side of the collection box, so that the switching control of the collection passage can be completed without an additional power source. Specifically, the collection box includes an inclined plate 17 fixedly mounted on one side of the flotation tank 1, a baffle plate 15 is fixedly mounted on one side of the inclined plate 17, and the inclined plate 17, the baffle plate 15 and the side wall of the flotation tank 1 jointly enclose a collection cavity for temporarily storing the floating nuts and light impurities during the flotation process. To enable the floating objects to be orderly introduced into the collection cavity after the flotation is finished, the upper end of the baffle plate 15 is provided with a liquid inlet 14, and the liquid inlet 14 is always located below the liquid level during the flotation process, so that the floating objects on the liquid level can naturally flow to this area along with the surface water flow. When the flotation operation is completed and the filter press plate 7 is controlled to rise and separate from the water surface, the sealing member is driven to move upward along with the upward movement of the filter press plate 7, so that the liquid inlet 14 is gradually opened. At this time, since there is no liquid inside the collection box and the liquid level in the flotation tank 1 is at a higher position, the liquid level difference forms a natural hydraulic gradient, and the water flow carrying the floating objects flows from the high position to the low position and is concentrated in the area above the collection box, realizing the directional enrichment of the floating objects. In addition, to realize the smooth discharge of the water in the collection box, the lower end of the inclined plate 17 is provided with a connection port, and a filter plate 16 is fixedly installed in the connection port for intercepting solid impurities in the floating objects to prevent subsequent pipeline blockage. The lower end of the inclined plate 17 is also fixedly installed with a fixed shell 13 communicating with the connection port, and one side of the fixed shell 13 is fixedly communicated with a pipeline interface 12. The water flow entering the collection box is filtered by the filter plate 16, flows into the fixed shell 13 through the connection port, and then is discharged to the outside through the pipeline interface 12. The pipeline interface 12 and the water outlet 4 are connected to an external wastewater collection device through an external pipeline, so as to realize the centralized discharge and subsequent treatment of flotation wastewater. After that, the filter press plate 7 is controlled to move downwards, driving the sealing member to move downwards to continue sealing the liquid inlet 14 for the subsequent flotation work. At this time, there is no liquid in the collection box, which can be cleaned.

[0022] As the most preferred technical solution of the present invention, the pushing component includes an electric push rod 9 fixedly installed on one side of the flotation tank 1. A connecting rod 21 is fixedly installed on the upper end of the electric push rod 9. In order to achieve smooth guiding and lifting of the filter plate 7, sliding openings 19 are provided through both sides of the fixing frame 10. Sliding rods 26 that slide in cooperation with the corresponding sliding openings 19 are fixedly installed on both sides of the filter plate 7. The two sliding rods 26 are respectively fixedly connected to the connecting rods 21 at the corresponding positions, so that the filter plate 7 is driven by the electric push rod 9 to move stably along the direction of the sliding openings 19. To coordinate the lifting and lowering strokes of the filter press plate 7 with the agitation action, the connecting component includes a sawtooth block 22 fixedly installed at the lower end of the connecting rod 21. Simultaneously, both ends of the rotating shaft 24 penetrate the flotation chamber 1 and are fixedly equipped with toothed rods 23 that mesh with the sawtooth block 22. The rotating shaft 24 is rotatably connected to the flotation chamber 1 via oil-sealed bearings to ensure the sealing of the rotating parts and long-term operational reliability. During the downward movement of the filter press plate 7 controlled by the electric actuator 9, when the sawtooth block 22 descends with the connecting rod 21 to engage with the toothed rod 23... Once engaged, the electric actuator 9 drives the filter press plate 7 to move up and down repeatedly, while the sawtooth block 22 also moves up and down synchronously, thereby driving the toothed rod 23 to repeatedly rotate in both directions. The toothed rod 23 transmits power to the stirring plate 18 through the rotating shaft 24, causing it to continuously stir the nuts piled on the upper end of the conveyor belt 2. Through the above-mentioned linkage design, only a single electric actuator 9 is needed to simultaneously drive the lifting and compaction of the filter press plate 7 and the rotation and turning of the stirring plate 18. During the stirring process, some nuts may be stirred inside the pile. Because they fail to make sufficient contact with water, the nuts tend to float. At this time, due to the shielding of the liquid surface area by the filter press plate 7 and the repeated pressing action, the floating nuts will be pressed back into the water. In addition, the stirring plate 18 continuously turns the material, making the fruit layer constantly loose and turning, increasing the contact opportunity between the nuts and water, and promoting the detachment and wetting process of surface bubbles. Through the synergistic effect of the filter press plate 7 and the stirring plate 18, the active turning of the accumulated layer is achieved, and the problem of secondary floating of high-quality nuts caused by the turning of materials during the stirring process is effectively curbed.

[0023] As the most preferred technical solution of the present invention, the sealing element includes a support rod 20 fixedly installed at one end of the filter press plate 7, and a sealing plate 8 is provided on one side of the baffle 15 to seal the liquid inlet 14. The sealing plate 8 is in sliding contact with one side of the baffle 15 and is fixedly connected to the support rod 20. The sealing plate 8 is divided into an upper plate 801 and a lower plate 802. When the filter press plate 7 is repeatedly raised and lowered below the liquid surface, the upper plate 801 seals the liquid inlet 14, and the filter press plate 7 moves up and away from the liquid surface to collect floating matter. At this time, the liquid inlet 14 is opened. Then the filter press plate 7 is controlled to move down, but the filter press plate 7 is still above the liquid surface. The lower plate 802 seals the liquid inlet 14. At this time, the nut material can be poured in again.

[0024] As the most preferred technical solution of the present invention, the upper end of the filter plate 7 is provided with an opening 25, and a filter screen 29 is rotatably installed in the opening 25 through a spring shaft. A connecting frame 28 is slidably provided on the outside of the rectangular shell 27 and fixedly connected to the filter plate 7. When the material is poured in, it will push the filter screen 29 to rotate. When there is no continuous feeding of nuts, the filter screen 29 rotates back to its original position and closes the opening 25 to prevent material from being exposed from the opening 25 when the filter plate 7 moves down. When the upper plate 801 seals the liquid inlet 14, the connecting frame 28 is detached from the rectangular shell 27. When the lower plate 802 seals the liquid inlet 14 and the liquid inlet 14 is opened, the connecting frame 28 and the rectangular shell 27 are in a connected state.

[0025] During work: (a) Initial equipment phase Clean water is injected into the flotation tank 1 through the inlet 3 to the preset working liquid level, so that the liquid level is higher than the position of the inlet 14 opened at the upper end of the baffle 15. At this time, the lower plate 802 of the sealing plate 8 is in a state of sealing the inlet 14, and the filter press 7 is in the initial position (above the liquid level). At this time, the connecting frame 28 and the rectangular shell 27 are in a connected state. (II) Feeding and Flotation Stage Nuts (such as pine nuts) to be floated are poured into the feed funnel 11. The material slides down through the rectangular shell 27. When it passes the opening 25 at the top of the filter plate 7, the gravity of the material pushes the filter screen 29 to rotate around the spring shaft and open. The material falls into the water in the flotation tank 1 through the opening 25. When no material falls, the filter screen 29 automatically closes the opening 25 under the reset action of the spring shaft, preventing the material from being exposed from the opening 25 when the filter plate 7 moves down. The filter screen 29 automatically resets and closes after the material passes through, ensuring the integrity of the working surface of the filter plate 7 during the pressing process. After the material is put into the water, it begins to separate into layers under the combined action of gravity and buoyancy. The plump and high-quality nuts have a higher density and gradually sink, accumulating on the horizontal section of conveyor belt 2. Empty shells, shriveled nuts, insect-damaged nuts, and mixed branches and leaves float on the surface of the liquid due to their lower density. Some plump pine nuts, whose outer shells are covered with a waxy hydrophobic film or have attached air bubbles, are temporarily stuck on the water surface due to the combined action of interfacial tension and the buoyancy of the air bubbles, and are mixed with inferior floating matter. (III) Filter Pressing Stage Start the electric actuator 9, drive the connecting rod 21 to move the filter press plate 7 downward along the sliding mouth 19 on both sides of the fixed frame 10. Part of the filter press plate 7 is immersed below the liquid surface. The filter press plate 7 drives the connecting rod 21 to move downward through the sliding rod 26. The serrated block 22 fixed at the lower end of the connecting rod 21 moves downward synchronously with the connecting rod 21 until the serrated block 22 meshes with the toothed rod 23. The electric actuator 9 controls the filter press plate 7 to perform repeated lifting and lowering movements within the preset stroke range (when the serrated block 22 is within the stroke range of meshing with the toothed rod 23). This applies periodic downward pressure to the nuts and impurities floating on the liquid surface. During this process, the plump nuts that have been mistakenly floating due to the hydrophobic surface wax layer or the adhesion of air bubbles are forcibly pushed back into the water by the filter press plate 7, making full contact with the water and accelerating the surface wetting process. At the same time, the lifting and lowering movement of the filter press plate 7 creates local water flow disturbance in the liquid surface area, which helps to separate the high-quality nuts that were originally stuck with branches and leaves from the impurities. As the filter press plate 7 rises and falls repeatedly, the sawtooth block 22 drives the toothed rod 23 to repeatedly rotate in both directions. The toothed rod 23 transmits power to the stirring plate 18 through the rotating shaft 24. During the rotation, the stirring plate 18 continuously tumbles the nut accumulation layer deposited on the horizontal section of the conveyor belt 2, effectively releasing the inferior fruits, empty shells and impurities mixed in the high-quality fruit layer and causing them to float to the liquid surface. At the same time, the reciprocating downward pressure of the filter press plate 7 presses the high-quality fruits that have floated up again due to the stirring back into the water. The two work in sequence and alternately. Throughout the flotation process, the liquid inlet 14 is kept sealed by the upper plate 801 to prevent water flow disturbance during the flotation process from bringing high-quality fruits that have not yet been fully wetted and settled into the collection box in advance. (iv) High-quality fruit output stage Start the conveyor belt 2. Its horizontal section carries the high-quality nuts that have sunk and moves forward. Then, it gradually rises along the inclined section and leaves the liquid surface, conveying the high-quality nuts out of the flotation box 1. The screen plate 6 installed on one side of the inclined section of the conveyor belt 2 blocks the floating objects remaining on the liquid surface during the conveying process, preventing the floating objects from being carried out with the inclined section of the conveyor belt 2, and ensuring the purity of the output. (v) Floating debris collection stage After the high-quality fruit is discharged, the electric actuator 9 drives the filter plate 7 to rise, so that the filter plate 7 is completely separated from the liquid surface and is above the liquid surface. At the same time as the filter plate 7 rises, the support rod 20 drives the sealing plate 8 to slide upward along the surface of the baffle 15. The upper plate 801 moves upward accordingly, and the liquid inlet 14, which was originally closed by the upper plate 801, gradually opens. At this time, the collection box is an empty cavity with no liquid inside, while the liquid level in the flotation box 1 is higher than the bottom of the collection box. The difference in liquid level forms a natural hydraulic slope. The surface floating matter flows from high to low under the water flow and flows into the collection cavity formed by the inclined plate 17, the baffle 15 and the side wall of the flotation box 1 through the liquid inlet 14. The water flowing into the collection box flows downward under the action of gravity. When it passes through the filter plate 16 installed in the lower end of the inclined plate 17, the solid impurities (empty shells, shriveled fruits, branches and leaves, etc.) in the floating objects are intercepted by the filter plate 16 and remain in the collection box. The filtered water flows into the fixed shell 13 through the connection port, and then is discharged to the external wastewater collection equipment through the pipe interface 12. The natural hydraulic slope formed by the liquid level difference drives the floating objects to flow in a specific direction. The electric actuator 9 drives the filter press plate 7 to move downwards to a position above the liquid surface (without being immersed in water). The filter press plate 7 drives the sealing plate 8 to move downwards via the support rod 20. At this time, the lower plate 802 seals the liquid inlet 14, completing the sealing and reset of the collection box, and preparing for the next round of flotation operation. At this time, the floating solid impurities in the collection box sink to the bottom of the collection box, and can then be cleaned.

[0026] The technical principles of the present invention have been described above with reference to specific embodiments. These descriptions are merely for explaining the principles of the invention and should not be construed as limiting the scope of protection of the invention in any way. Based on this explanation, those skilled in the art can readily conceive of other specific embodiments of the invention without inventive effort, and these embodiments will all fall within the scope of protection of the claims of the present invention.

Claims

1. A flotation machine for nut processing, comprising a flotation tank (1), an inlet (3) and an outlet (4) fixedly connected to the flotation tank (1), characterized in that, The flotation box (1) is equipped with a conveyor belt (2) for conveying sinking nuts. Multiple rubber plates (5) are fixedly installed at equal intervals on the outer side of the conveyor belt (2). A fixed frame (10) is fixedly installed at the upper end of the flotation box (1). A feeding component is fixedly installed on the fixed frame (10). A filter press (7) is provided above the flotation box (1). Pushing components for controlling the lifting and lowering of the filter press (7) are provided on both sides of the flotation box (1). An agitator is rotatably installed inside the flotation box (1). A connecting component is provided between the pushing component and the agitator. A collection box for collecting floating nuts is provided inside the flotation box (1). A sealing component is provided on one side of the collection box. When the pushing component controls the lifting and lowering of the filter press (7), it is also used to drive the sealing component to close or open one side of the collection box.

2. The flotation machine for nut processing according to claim 1, characterized in that, The pusher includes an electric push rod (9) fixedly installed on one side of the flotation tank (1), a connecting rod (21) fixedly installed on the upper end of the electric push rod (9), and sliding openings (19) through both sides of the fixing frame (10). Slide rods (26) that are slidably connected to the corresponding sliding openings (19) are fixedly installed on both sides of the filter press plate (7). The two slide rods (26) are fixedly connected to the connecting rods (21) corresponding to the positions.

3. The flotation machine for nut processing according to claim 2, characterized in that, The agitator includes a rotating shaft (24) rotatably connected to the flotation tank (1), and a plurality of agitating plates (18) are fixedly installed on the circumference of the rotating shaft (24).

4. The flotation machine for nut processing according to claim 3, characterized in that, The connector includes a sawtooth block (22) fixedly installed at the lower end of the connecting rod (21), and both ends of the rotating shaft (24) penetrate the flotation tank (1) and are fixedly installed with a toothed rod (23) that meshes with the sawtooth block (22).

5. A flotation machine for nut processing according to claim 4, characterized in that, The feeding assembly includes a rectangular shell (27) fixedly installed on a fixed frame (10). The upper end of the rectangular shell (27) is fixedly connected to a feeding funnel (11). The upper end of the filter plate (7) has an opening (25) through which a filter screen (29) is rotatably installed via a spring shaft. The outer side of the rectangular shell (27) is slidably provided with a connecting frame (28) fixedly connected to the filter plate (7).

6. A flotation machine for nut processing according to claim 5, characterized in that, The conveyor belt (2) is located inside the flotation tank (1) with one end horizontal and the other end inclined. A screen plate (6) is fixedly installed on the flotation tank (1) and the screen plate (6) is located on one side of the inclined section of the conveyor belt (2).

7. A flotation machine for nut processing according to claim 6, characterized in that, The collection box includes an inclined plate (17) fixedly installed on one side of the flotation box (1). A baffle (15) is fixedly installed on one side of the inclined plate (17). The inclined plate (17), the baffle (15) and the side wall of the flotation box (1) form a collection cavity for collecting nuts and impurities that float during flotation. An inlet (14) is provided at the upper end of the baffle (15).

8. A flotation machine for nut processing according to claim 7, characterized in that, The inclined plate (17) has a connection port at its lower end, and a filter plate (16) is fixedly installed inside the connection port. A fixed housing (13) communicating with the connection port is fixedly installed at the lower end of the inclined plate (17), and a pipe interface (12) is fixedly connected to one side of the fixed housing (13).

9. A flotation machine for nut processing according to claim 8, characterized in that, The sealing element includes a support rod (20) fixedly installed at one end of the filter press plate (7). A sealing plate (8) is provided on one side of the baffle (15) to seal the liquid inlet (14). The sealing plate (8) slides in contact with one side of the baffle (15). The sealing plate (8) is fixedly connected to the support rod (20). The sealing plate (8) is divided into an upper plate (801) and a lower plate (802). There is a gap between the filter press plate (7) and the sealing plate (8).

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