Longan fruit fresh fruit soaking, shaking sand and drying integrated equipment and application method

Abstract

The application is a longan fresh fruit soaking, sand shaking, skin rubbing and drying integrated equipment and application method, which comprises a rack, a driving mechanism, a rotating barrel, an automatic sand adding mechanism, an automatic water injecting mechanism and a drying mechanism installed on the rack; the drying mechanism is arranged inside the rotating barrel and dries the longan fresh fruit inside the rotating barrel in time; the soaking, sand shaking, skin rubbing and drying three processes are combined and completed in sequence in one equipment, which greatly reduces labor, work and auxiliary time, improves productivity and economic benefits; and the drying process is completed under the condition of rotating and tumbling of the longan fresh fruit; compared with the longan fresh fruit layer-by-layer spreading type drying method, the longan fresh fruit is heated more uniformly, the heat efficiency is higher, and the drying quality is better; under the control of the PLC, the hot air flow and temperature precision adjusted by the hot air blower and the proportional flow valve are high, the adaptability to the drying process is strong, and the inside of the rotating barrel is entirely paved with silica gel plates, which can resist and preserve heat during the working process.

Description

Technical Field

[0001] This invention relates to the fields of soaking, shaking and rubbing, and drying of fresh longan fruit, specifically to an integrated device and application method for soaking, shaking and rubbing, and drying of fresh longan fruit. Background Technology

[0002] Dried longan is a popular and nutritious food with a large consumer market throughout my country. Fresh longan ripens in the hot summer, has a short harvest period, and is not very durable, leading to high sales pressure and volatile prices. Compared to fresh longan, dried longan can be stored for a longer time, is easier to transport, expands the sales reach, and can be processed into various high-value-added products, further increasing farmers' income. Currently, there are few dried longan processing enterprises in my country, and they are mostly small-scale, scattered in longan-producing areas such as Guangdong, Guangxi, and Fujian. Processing is still largely done by individual, decentralized farmers, resulting in a disorganized and haphazard approach. The amount processed varies depending on the sales of fresh longan; less is processed when sales are good, and more is processed when sales are poor.

[0003] The processing steps for dried longan are: fruit selection, cutting, soaking, rubbing off sand and peeling, drying, yellowing, grading, and packaging. Soaking and rubbing off sand and peeling are preliminary steps for drying fresh longan. Their functions are to soften the peel and remove surface impurities, remove surface wax to increase the capillary channels for water evaporation, and powder the surface of the fruit, providing the prerequisites and guarantees for efficient drying to produce high-quality, excellent-looking dried longan.

[0004] Currently, the soaking and washing, and sand-sanding / peeling processes still largely rely on traditional bamboo-woven shaking baskets, entirely dependent on manual labor. The drying process is mostly carried out in rack-type drying rooms, resulting in serious problems such as outdated production equipment, difficulty in controlling processes and technical standards, low efficiency, and high costs. These issues significantly hinder technological progress and industry development in longan drying. To address these problems, we provide an integrated device and application method for soaking, sand-sanding / peeling, and drying fresh longan fruit. Summary of the Invention

[0005] The purpose of this invention is to provide an integrated device and application method for soaking, shaking, rubbing, and drying fresh longan fruit to solve the above-mentioned technical problems.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an integrated device for soaking, shaking, rubbing and drying fresh longan fruit, comprising a frame, on which a drive mechanism, a rotating barrel, an automatic sand-adding mechanism, an automatic water-injecting mechanism and a drying mechanism are installed;

[0007] The drive mechanism is connected to the rotating barrel, and the drive mechanism drives the rotating barrel to rotate at regular intervals;

[0008] The rotating barrel is used to receive fresh longan fruit and drive the fresh longan fruit to rotate.

[0009] The automatic sand-adding mechanism is located above the rotating barrel and adds sand into the rotating barrel at regular intervals;

[0010] The automatic water injection mechanism is located on one side of the rotating barrel and injects water into the rotating barrel at regular intervals;

[0011] The drying mechanism is installed inside the rotating drum and dries the fresh longan fruit inside the rotating drum at regular intervals. One end of the drying mechanism extends out of the rotating drum and is connected to an external hot air blower.

[0012] Preferably, the drying mechanism includes a hollow drying tube, which is rotatably connected to the opposite side walls of the rotating barrel. One end of the drying tube passes through the side wall of the rotating barrel and is connected to a hot air blower. The outer wall of the drying tube is provided with several sets of air jet holes, which are located in the center inside the rotating barrel.

[0013] Preferably, a proportional flow valve is provided between the drying pipe and the hot air blower.

[0014] Preferably, the inner walls of the rotating barrel are symmetrically provided with silicone heat insulation plates at opposite ends, and a number of silicone sanding and rubbing reinforcing strips are provided at equal angles along the axial direction of the inner wall of the cylindrical surface of the rotating barrel. The cross-sectional shape of the silicone sanding and rubbing reinforcing strips is rectangular, and the two corners of the silicone sanding and rubbing reinforcing strips away from the inner wall of the rotating barrel are provided with 45-degree chamfers.

[0015] Preferably, the outer wall of the rotating barrel has a longan fruit inlet, the longan fruit inlet is equipped with a barrel cover assembly, the outer wall of the rotating barrel has a sand inlet that cooperates with the automatic sand adding mechanism, fixed shafts are symmetrically fixed to opposite ends of the rotating barrel, a first bearing with a seat is installed on the frame, and the fixed shaft is rotatably connected to the first bearing with a seat.

[0016] Preferably, the drive mechanism includes a drive motor, a reducer, a drive sprocket, a driven sprocket, and a chain. The reducer is mounted on a frame, the input shaft of the reducer is connected to the drive motor, the output shaft of the reducer is connected to the drive sprocket, the driven sprocket is mounted on the outer wall of a fixed shaft, and the drive sprocket and the driven sprocket are connected by a chain drive.

[0017] Preferably, the automatic sand-adding mechanism includes two sets of second bearings with seats, which are symmetrically mounted on the frame. A hollow rotating shaft is rotatably connected between the two sets of second bearings. A sand-collecting port is opened at the top of the rotating shaft. A rotary cylinder is fixedly connected to the frame. The rotary cylinder is connected to one end of the rotating shaft through a coupling and a connecting shaft.

[0018] Preferably, the automatic water injection mechanism includes a water pump and a water tank. The water tank is placed on a frame, and the water pump is installed on top of the water tank. The water pump is connected to the water tank and is connected to a water hose. A telescopic cylinder is installed on the frame, and a water inlet block is fixedly connected to the telescopic end of the telescopic cylinder. One end of the water hose is connected to the water inlet block. A leak-proof rubber block is installed on the side of the water inlet block near the rotating barrel by bolts. A water inlet pipe assembly that fits tightly with the leak-proof rubber block is provided on the side wall of the rotating barrel.

[0019] Preferably, the water inlet pipe assembly includes four sets of guide screws, with a limiting disc fixed to the outer wall of the four sets of guide screws, and a water inlet pipe slidably connected through the inner cavity of the limiting disc, with one end of the water inlet pipe penetrating the side wall of the rotating barrel.

[0020] A method for applying an integrated device for soaking, washing, rinsing, and drying fresh longan fruit, the method comprising the following steps:

[0021] S1: Power on and set operating parameters, check if the rotating barrel, automatic sand adding mechanism and automatic water injection mechanism are in their original positions;

[0022] S2: Add fresh longan fruit into the rotating barrel and add a fixed amount of sand into the automatic sand-adding mechanism;

[0023] S3: Water immersion: Water is automatically injected into the rotating tank, and the tank is soaked for a specified time.

[0024] S4: After soaking, start the drive mechanism to rotate the rotating barrel structure 180 degrees to drain the water into the water tank. After draining, the rotating barrel rotates 180 degrees to return to its original position.

[0025] S5: Adding sand: The automatic sand adding mechanism rotates 180 degrees to add sand into the rotating barrel. After the sand adding is completed, the automatic sand adding mechanism returns to its original position.

[0026] S6: Shaking and Scrubbing: Start the drive mechanism to drive the rotating barrel to rotate at the set frequency and time to shake and scrub the skin for the set time;

[0027] S7: Drying: After the sand-scraping process is completed, start the hot air blower, proportional flow valve and drive mechanism to drive the rotating drum to rotate intermittently while receiving hot air spray. The humid exhaust gas is discharged from the sand inlet and the drying process continues until the set time is reached.

[0028] S8: Stop and unload: Open the lid of the rotating barrel structure, unload the dried longan and let it fall into the discharge hopper assembly with screen holes, separate the sand and dried longan and put it into baskets, complete the washing, shaking and wiping of fresh longan fruit and drying, and wait for the next cycle.

[0029] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0030] This invention combines the three processes of soaking, washing, rubbing, and drying into a single machine, significantly reducing labor, working and auxiliary time, and improving productivity and economic benefits. Furthermore, the drying process is completed while the longan fruit is rotating and tumbling, resulting in more even heating, higher thermal efficiency, and better drying quality compared to the layer-by-layer drying method. Under PLC control, the hot air flow and temperature are precisely regulated by the hot air blower and proportional flow valve, ensuring high compatibility with the drying process. Additionally, the entire inner side of the drum is lined with silicone mats, providing both heat resistance and insulation during operation. Attached Figure Description

[0031] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0032] Figure 1 This is a front view structural diagram of the present invention;

[0033] Figure 2 This is a side view of the structure of the present invention;

[0034] Figure 3 for Figure 1 Enlarged schematic diagram of the structure at point A under water injection conditions;

[0035] Figure 4 for Figure 1 Enlarged schematic diagram of the structure at point A in the unwatered state;

[0036] Figure 5 for Figure 1 Enlarged structural diagram at point B;

[0037] Figure 6 This is a schematic diagram of the rotating shaft in this invention;

[0038] Figure 7 This is a schematic diagram of the rotating barrel structure in this invention;

[0039] Figure 8 for Figure 7 Enlarged structural diagram at point C;

[0040] Figure 9 This is a side view of the rotating barrel structure in this invention.

[0041] Figure 10 for Figure 9 Enlarged structural diagram at point D;

[0042] Figure 11 This is a structural diagram of the drying tube in this invention.

[0043] The attached diagram lists the components represented by each number as follows:

[0044] 1. Frame; 2. Drive mechanism; 21. Drive motor; 22. Reducer; 23. Drive sprocket; 24. Driven sprocket; 25. Chain; 3. Rotating barrel; 31. Barrel lid assembly; 32. Sand inlet; 33. Fixed shaft; 34. First bearing with seat; 4. Automatic sand adding mechanism; 41. Second bearing with seat; 42. Rotating shaft; 43. Rotary cylinder; 44. L-shaped bracket; 45. Coupling; 46. Connecting shaft; 5. Automatic water injection mechanism; 1. Water pump; 52. Water tank; 53. Water hose; 54. Telescopic cylinder; 55. Water inlet block; 56. Leak-proof rubber block; 57. Water inlet pipe assembly; 571. Guide screw; 572. Limiting plate; 573. Water inlet pipe; 574. Spring; 6. Drying mechanism; 61. Drying pipe; 62. Air jet; 7. Hot air blower; 8. Proportional flow valve; 9. Silicone heat insulation board; 10. Silicone sanding and rubbing reinforcing strip; 11. Electrical control box; 12. Discharge hopper assembly. Detailed Implementation

[0045] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0046] Please see Figure 1-11 The present invention provides a technical solution: an integrated equipment for soaking, shaking, rubbing and drying fresh longan fruit, including a frame 1, on which a drive mechanism 2, a rotating barrel 3, an automatic sand adding mechanism 4, an automatic water injection mechanism 5 and a drying mechanism 6 are installed;

[0047] The drive mechanism 2 is connected to the rotating barrel 3, and the drive mechanism 2 drives the rotating barrel 3 to rotate at regular intervals;

[0048] The rotating barrel 3 is used to receive fresh longan fruit and drive the fresh longan fruit to rotate;

[0049] An automatic sand-adding mechanism 4 is installed above the rotating barrel 3 and adds sand into the rotating barrel 3 at regular intervals;

[0050] An automatic water injection mechanism 5 is installed on one side of the rotating tank 3 and injects water into the rotating tank 3 at regular intervals;

[0051] The drying mechanism 6 is installed inside the rotating drum 3 and dries the fresh longan fruit inside the rotating drum 3 at regular intervals. One end of the drying mechanism 6 extends out of the rotating drum 3 and is connected to the external hot air blower 7.

[0052] Specifically, the drying mechanism 6 includes a hollow drying tube 61, which is rotatably connected to the opposite side walls of the rotating barrel 3. One end of the drying tube 61 passes through the side wall of the rotating barrel 3 and is connected to the hot air blower 7. Several sets of air jet holes 62 are opened on the outer wall of the drying tube 61, and the air jet holes 62 are located in the center inside the rotating barrel 3. The drying tube and the longan fruit inside the rotating barrel rotate relative to each other, so that when the rotating barrel rotates, the air jet holes on the drying tube can blow hot air into the longan fruit inside the rotating barrel from all directions, thereby efficiently drying the longan fruit inside the rotating barrel.

[0053] Specifically, a proportional flow valve 8 is installed between the drying pipe 61 and the hot air blower 7, and the hot air blower and the proportional flow valve adjust the required hot air flow rate, temperature and shut-off time.

[0054] Specifically, silicone heat insulation plates 9 are symmetrically arranged on the inner walls of opposite ends of the rotating barrel 3. Several silicone sand-scraping reinforcing strips 10 are arranged at equal angles along the axial direction of the inner wall of the cylindrical surface of the rotating barrel 3. The cross-sectional shape of the silicone sand-scraping reinforcing strips 10 is rectangular. The two corners of the silicone sand-scraping reinforcing strips 10 away from the inner wall of the rotating barrel 3 are chamfered at 45 degrees. The silicone heat insulation plates and silicone sand-scraping reinforcing strips can effectively reduce the heat dissipation from the barrel wall of the rotating barrel. The cross-sectional shape of the silicone sand-scraping reinforcing strips is rectangular. The two corners of the silicone sand-scraping reinforcing strips away from the inner wall of the rotating barrel 31 are chamfered at 45 degrees. The 45-degree chamfer of the silicone sand-scraping reinforcing strips can increase the friction of the longan fruit during sand-scraping and reduce the rotation speed of the longan fruit in the rotating barrel, thereby avoiding damage to the longan fruit due to excessive centrifugal impact.

[0055] Specifically, the outer wall of the rotating barrel 3 has a longan fruit inlet, and the longan fruit inlet is equipped with a barrel cover assembly 31. The outer wall of the rotating barrel 3 has a sand inlet 32 ​​that cooperates with the automatic sand adding mechanism 4. Fixed shafts 33 are symmetrically fixed at opposite ends of the rotating barrel 3. A first bearing 34 with a seat is installed on the frame 1. The fixed shaft 33 is rotatably connected to the first bearing 34 with a seat. The sand inlet on the rotating barrel can also be used as a drainage hole and an exhaust hole.

[0056] Specifically, the drive mechanism 2 includes a drive motor 21, a reducer 22, a drive sprocket 23, a driven sprocket 24, and a chain 25. The reducer 22 is mounted on the frame 1. The input shaft of the reducer 22 is connected to the drive motor 21, and the output shaft of the reducer 22 is connected to the drive sprocket 23. The driven sprocket 24 is mounted on the outer wall of the fixed shaft 33. The drive sprocket 23 and the driven sprocket 24 are connected by a chain 25.

[0057] Specifically, the automatic sand-adding mechanism 4 includes two sets of second bearings 41, which are symmetrically mounted on the frame 1. A hollow rotating shaft 42 is rotatably connected between the two sets of second bearings 41. A sand-collecting port is opened at the top of the rotating shaft 42. A rotary cylinder 43 is fixedly connected to the frame 1. The rotary cylinder 43 is connected to one end of the rotating shaft 42 through a coupling 45 and a connecting shaft 46.

[0058] Specifically, the automatic water filling mechanism 5 includes a water pump 51 and a water tank 52. The water tank 52 is placed on the frame 1, and the water pump 51 is installed on top of the water tank 52 and connected to the water tank 52. The water pump 51 is connected to a water hose 53. A telescopic cylinder 54 is installed on the frame 1. A water inlet block 55 is fixedly connected to the telescopic end of the telescopic cylinder 54. One end of the water hose 53 is connected to the water inlet block 55. A leak-proof rubber block 56 is installed on the side of the water inlet block 55 near the rotating barrel 3 by bolts. A water inlet pipe assembly 57 is provided on the side wall of the rotating barrel 3, which is in close contact with the leak-proof rubber block 56. The telescopic cylinder can push the water inlet block to move, so that the water inlet block contacts the water inlet pipe assembly, thereby realizing automatic water filling.

[0059] Specifically, the water inlet pipe assembly 57 includes four sets of guide screws 571. A limiting disk 572 is fixedly connected to the outer wall of the four sets of guide screws 571. A water inlet pipe 573 is slidably connected through the inner cavity of the limiting disk 572. One end of the water inlet pipe 573 passes through the side wall of the rotating barrel 3. The limiting effect of the guide screws and the limiting disk enables the water inlet pipe to move in a straight line, so as not to deviate.

[0060] A method for applying an integrated device for soaking, washing, rubbing, and drying fresh longan fruit, the method comprising the following steps:

[0061] S1: Power on and set the operating parameters, and check whether the rotating barrel 3, the automatic sand adding mechanism 4, and the automatic water injection mechanism 5 are in their original positions;

[0062] S2: Add fresh longan fruit into the rotating barrel 3 and add a certain amount of sand into the automatic sand adding mechanism 4;

[0063] S3: Water immersion: Water is injected into the rotating tank 3 through the automatic water injection mechanism 5, and the tank is soaked for a specified time;

[0064] S4: After soaking, start the drive mechanism 2 to drive the rotating barrel structure 3 to rotate 180 degrees to drain the water and enter the water tank. After draining, the rotating barrel 3 rotates 180 degrees to return to its original position.

[0065] S5: Adding sand: The automatic sand adding mechanism 4 rotates 180 degrees to add sand into the rotating barrel 3. After the sand adding is completed, the automatic sand adding mechanism 4 returns to its original position.

[0066] S6: Shaking and rubbing: Start the drive mechanism 2 to drive the rotating barrel 3 to rotate at the set frequency and time to shake and rub the skin for the set time;

[0067] S7: Drying: After the sand-scraping process is completed, start the hot air blower 7, the proportional flow valve 8 and the drive mechanism 2 to drive the rotating drum 3 to rotate intermittently while receiving hot air spray. The humid exhaust gas is discharged from the sand inlet and the drying process continues until the set time is reached.

[0068] S8: Stop and unload: Open the lid of the rotating barrel structure 3, unload the dried longan and let it fall into the discharge hopper assembly with screen holes, separate the sand and dried longan and put it into a basket, complete the washing, shaking and wiping of fresh longan fruit and drying, and wait for the next cycle.

[0069] A specific embodiment of the present invention is applied as follows:

[0070] Please refer to Figure 1 and Figure 2 As shown: A device integrating washing, shaking, rubbing, and drying of fresh longan fruit includes a frame 1. The frame 1 is equipped with a drive mechanism 2, a rotating drum 3, an automatic sand-adding mechanism 4, an automatic water-injecting mechanism 5, and a drying mechanism 6. The drive mechanism 2 is connected to the rotating drum 3 and drives the rotating drum 3 to rotate periodically. The rotating drum 3 is used to receive and rotate the fresh longan fruit. The automatic sand-adding mechanism 4 is located above the rotating drum 3 and adds sand to the rotating drum 3 periodically. The automatic water-injecting mechanism 5 is located on one side of the rotating drum 3 and injects water into the rotating drum 3 periodically. The drying mechanism 6 is located inside the rotating drum 3 and dries the fresh longan fruit inside the rotating drum 3 periodically. One end of the drying mechanism 6 extends out of the rotating drum 3 and is connected to an external hot air blower 7.

[0071] Please refer to Figure 1 and Figure 11 As shown: The drying mechanism 6 includes a hollow drying tube 61, which is rotatably connected to the opposite side walls of the rotating barrel 3. One end of the drying tube 61 passes through the side wall of the rotating barrel 3 and is connected to the hot air blower 7. Several sets of air jet holes 62 are opened on the outer wall of the drying tube 61, and the air jet holes 62 are located in the center inside the rotating barrel 3. The drying tube and the longan fruit inside the rotating barrel rotate relative to each other, so that when the rotating barrel rotates, the air jet holes on the drying tube can blow hot air into the rotating barrel from all directions, thereby efficiently drying the longan fruit inside the rotating barrel. A proportional flow valve 8 is provided between the drying tube 61 and the hot air blower 7. The hot air blower and the proportional flow valve adjust the required flow rate, temperature and shut-off time of the hot air.

[0072] Please refer to Figure 2 , Figure 7 , Figure 8 , Figure 9 and Figure 10As shown: The outer wall of the rotating barrel 3 has a longan fruit inlet, which is equipped with a barrel cover assembly 31. The outer wall of the rotating barrel 3 has a sand inlet 32 ​​that cooperates with the automatic sand adding mechanism 4. Fixed shafts 33 are symmetrically fixed at opposite ends of the rotating barrel 3. A first bearing 34 with a seat is installed on the frame 1. The fixed shafts 33 and the first bearing 34 with a seat are rotatably connected. The sand inlet on the rotating barrel can also be used as a drainage hole and an exhaust hole. The opening size of the sand inlet 32 ​​gradually decreases from the outer wall of the rotating barrel 3 to the inner wall of the rotating barrel 3, and the opening size of the inner wall of the sand inlet 32 ​​is 3-5mm. Several sets of silicone sand-scraping reinforcing strips 10 are fixed at equal angles along the axial direction of the rotating barrel 3 on the inner wall of the cylindrical surface of the rotating barrel 3. The cross-sectional shape of the silicone sand-scraping reinforcing strips 10 is rectangular. The silicone sand-scraping reinforcing strips 10 have 45-degree chamfers at the two corners away from the inner wall of the rotating barrel 3. The 45-degree chamfers of the adjacent silicone sand-scraping reinforcing strips 10 can increase the friction of the longan fruit during sand-scraping and reduce the rotation speed of the longan fruit in the rotating barrel 3, thereby avoiding damage to the longan fruit due to excessive centrifugal impact. In addition, there are gaps at both ends of the silicone sand-scraping reinforcing strips 10 and the two ends of the rotating barrel 3, and there is a gap between two adjacent sets of silicone sand-scraping reinforcing strips 10. The gap size is 1-2mm, so that during the drainage process, the soaking water accumulated at the chamfer of the lower reinforcing strips can be completely discharged through the gap, thereby making the soaking water drain more thoroughly. At the same time, silicone heat insulation plates 9 are symmetrically arranged on the inner walls of the rotating barrel 3 at opposite ends, which can effectively reduce the heat loss from the barrel wall to the outside.

[0073] Please refer to Figure 1 and Figure 2 As shown: The drive mechanism 2 includes a drive motor 21, a reducer 22, a drive sprocket 23, a driven sprocket 24, and a chain 25. The reducer 22 is mounted on the frame 1. The input shaft of the reducer 22 is connected to the drive motor 21, and the output shaft of the reducer 22 is connected to the drive sprocket 23. The driven sprocket 24 is mounted on the outer wall of the fixed shaft 33. The drive sprocket 23 and the driven sprocket 24 are connected by a chain 25.

[0074] Please refer to Figure 1 , Figure 5 and Figure 6 As shown: The automatic sand-adding mechanism 4 includes two sets of second bearings 41 with seats. The two sets of second bearings 41 are symmetrically mounted on the frame 1. A hollow rotating shaft 42 is rotatably connected between the two sets of second bearings 41. A sand-collecting port is opened at the top of the rotating shaft 42. A rotary cylinder 43 is fixedly connected to the frame 1. The rotary cylinder 43 is connected to one end of the rotating shaft 42 through a coupling 45 and a connecting shaft 46.

[0075] Please refer to Figure 1 , Figure 2 , Figure 3 and Figure 4As shown: The automatic water filling mechanism 5 includes a water pump 51 and a water tank 52. The water tank 52 is placed on the frame 1, and the water pump 51 is installed on the top of the water tank 52. The water pump 51 is connected to the water tank 52 and is connected to a water hose 53. A telescopic cylinder 54 is installed on the frame 1. A water inlet block 55 is fixedly connected to the telescopic end of the telescopic cylinder 54. One end of the water hose 53 is connected to the water inlet block 55. A leak-proof rubber block 56 is installed on the side of the water inlet block 55 near the rotating barrel 3 by bolts. A water inlet pipe assembly 57 is provided on the side wall of the rotating barrel 3, which is in close contact with the leak-proof rubber block 56. The telescopic cylinder can push the water inlet block to slide, so that the water inlet block contacts the water inlet pipe assembly, thereby realizing automatic water filling.

[0076] Please refer to Figure 8 As shown: The water inlet pipe assembly 57 includes four sets of guide screws 571. A limiting disk 572 is fixedly connected to the outer wall of the four sets of guide screws 571. A water inlet pipe 573 is slidably connected through the inner cavity of the limiting disk 572. One end of the water inlet pipe 573 passes through the side wall of the rotating barrel 3. The limiting effect of the guide screws and the limiting disk enables the water inlet pipe to move in a straight line, so as not to deviate.

[0077] Please refer to Figure 8 As shown: A limiting sleeve is fixed to the outer wall of the water inlet pipe 573, and a spring 574 is sleeved on the outer wall of the water inlet pipe 573. The spring 574 is located between the limiting sleeve and the side wall of the rotating barrel 3, so that the water inlet pipe can automatically reset under the action of the spring's restoring force after water is filled.

[0078] Please refer to Figure 8 As shown: The water inlet pipe 573 has a water inlet on its side wall and the end of the water inlet pipe 573 is a sealed structure. The rotating barrel 3 has an insertion interface on its side wall that matches the end of the water inlet pipe 573, so that when the end of the water inlet pipe is removed from the inside of the rotating barrel and is flush with the inner side of the barrel wall, the end of the water inlet pipe can play the role of sealing the rotating barrel structure.

[0079] Please refer to Figure 8 As shown: Two nuts are screwed onto the outer wall of the guide screw 571, and the limiting plate 572 is set between the two nuts to lock and fix the limiting plate, ensuring the stability of the limiting plate;

[0080] Please refer to Figure 1 As shown: An electrical control box 11 is installed on one side of the frame 1 via a connecting rod. The electrical control box 11 is electrically connected to the drive mechanism 2, the automatic sand adding mechanism 4, the automatic water injection mechanism 5, and the drying mechanism 6, respectively. The automatic control and efficient production of batch production are achieved through the control system in the electrical control box.

[0081] Please refer to Figure 1As shown: A set of discharge hopper assemblies 12 is installed on the frame 1. The discharge hopper assembly 12 is located below the rotating barrel 3. The discharge hopper assembly 12 is provided with screen holes, so as to separate sand and dried longan and put them into baskets.

[0082] The equipment is automatically controlled by the PLC inside the electrical control box 11 during use.

[0083] 1) Power on and set the operating parameters, and check whether the sand inlet 32, the rotary cylinder 43 and the telescopic cylinder 54 of the rotating barrel 3 are in their original positions;

[0084] 2) Open the barrel cover assembly 31 of the longan inlet of the rotating barrel 3, then pour an appropriate amount of fresh longan fruit into the rotating barrel 3, and then add a certain amount of sand into the rotating shaft 42 through the sand inlet;

[0085] 3) Water immersion: The controller in the electrical control box 11 controls the telescopic cylinder 54 to start working. The piston rod of the telescopic cylinder 54 drives the water inlet block 55 and the anti-leakage rubber block 56 to extend from their original positions and press against the water inlet pipe 573. The water inlet pipe 573 moves along the limit plate 572 to start compressing the spring 574 and inserting into the side wall of the rotating barrel 3. Then the water pump 51 starts working, pumping water through the water hose 53 into the water inlet block 55 and the anti-leakage rubber block 56 and into the water inlet pipe 573, thereby injecting water into the rotating barrel 3. After injecting water for a predetermined period of time, the water pump 51 is turned off, and the telescopic cylinder 54 retracts the water inlet block 55 and the anti-leakage rubber block 56 to their original positions, so that the water inlet pipe 573 returns to its original position under the restoring force of the spring 574.

[0086] 4) Pouring water: After soaking for a period of time, start the drive motor 21. The drive motor 21 rotates and drives the drive sprocket 23 to rotate after being reduced by the reducer 22. This drives the rotating barrel 3 to rotate 180 degrees through the chain 25 and the driven sprocket 24, thereby draining the soaking water into the water tank 52. After the drainage is completed, the drive motor 21 drives the rotating barrel 3 to return to its original position.

[0087] 5) Adding sand: Start the rotary cylinder 43, which drives the rotating shaft 42 to rotate 180 degrees, thereby pouring the fine sand in the rotating shaft 42 into the rotating barrel 3 through the sand inlet 32; after the sand is added, the rotary cylinder 43 drives the rotating shaft 32 back to its original position, completing the sand adding operation;

[0088] 6) Shaking and rubbing: After sanding is completed, the drive motor 21 is started. The drive motor 21 drives the active sprocket 23 to rotate through the reducer 22, and drives the driven sprocket 24 to rotate through the chain 25. This drives the rotating barrel 3 to rotate at the set frequency and time to shake and rub the longan. During the shaking and rubbing process, the friction between the silicone shaking and rubbing reinforcing strip 10 and the gap inside the rotating barrel 3 is enhanced, making the longan fruit turn more quickly and thoroughly, thus improving the shaking and rubbing effect of the longan.

[0089] 7) Drying: After the sand shaking and rubbing is completed, start the hot air blower 7, the proportional flow valve 8 and the drive mechanism 2. The drive motor 21 drives the rotating barrel 3 to rotate intermittently while receiving hot air spray. The humid exhaust gas is discharged from the sand inlet and the drying is carried out until the set time.

[0090] The drying process is as follows: The hot air blower starts working upon receiving an instruction. Under the control of the PLC, the hot air blower 7 and the proportional flow valve 8 adjust the required hot air flow rate, temperature, and off-time. After the hot air blower is operating normally, the proportional flow valve 8 opens, and hot air at the predetermined flow rate and temperature is input into the drying pipe 61 through the connecting pipe. This causes the rotating drum 3 to rotate intermittently while receiving hot air jets. Moist exhaust gas is discharged through the sand inlet (water inlet / outlet). The rotation speed and time of the drum, as well as the predetermined flow rate and temperature of the hot air, are automatically controlled by the PLC according to the planned drying parameter curve. When the drying time is up, the hot air blower stops working, the drum stops rotating, and the drying process is complete.

[0091] 8) Stop and unload: After drying, rotate the longan inlet of the rotating barrel 3 to the top of the discharge hopper assembly 12, and then open the barrel cover assembly 31 of the rotating barrel 3 to discharge the dried longan and sand onto the discharge hopper assembly 12. The discharge hopper assembly 12 is set at a downward tilt angle and has sieve holes to separate the sand and dried longan and pack them into baskets, thus completing the washing, shaking and wiping of the fresh longan fruit and drying.

[0092] In the description of this invention, it should be understood that the terms "coaxial," "bottom," "one end," "top," "middle," "other end," "upper," "side," "top," "inner," "front," "center," "both ends," etc., indicate the orientation or positional relationship based on the drawings, and are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0093] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "setting," "connection," "fixing," "screw connection," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0094] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that variations may 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. A device integrating soaking, washing, rinsing, and drying of fresh longan fruit, characterized in that: It includes a frame (1), on which a drive mechanism (2), a rotating barrel (3), an automatic sand adding mechanism (4), an automatic water injection mechanism (5), and a drying mechanism (6) are installed; The drive mechanism (2) is connected to the rotating barrel (3), and the drive mechanism (2) drives the rotating barrel (3) to rotate at regular intervals; The rotating barrel (3) is used to receive fresh longan fruit and drive the fresh longan fruit to rotate; The automatic sand-adding mechanism (4) is located above the rotating barrel (3) and adds sand into the rotating barrel (3) at regular intervals; The automatic water injection mechanism (5) is located on one side of the rotating barrel (3) and injects water into the rotating barrel (3) at regular intervals; The drying mechanism (6) is set inside the rotating barrel (3) and dries the fresh longan fruit inside the rotating barrel (3) at regular intervals. One end of the drying mechanism (6) extends out of the rotating barrel (3) and is connected to an external hot air blower (7). The drying mechanism (6) includes a hollow drying tube (61), which is rotatably connected to the opposite side walls of the rotating barrel (3). One end of the drying tube (61) passes through the side wall of the rotating barrel (3) and is connected to the hot air blower (7). The outer wall of the drying tube (61) is provided with several sets of air jet holes (62), and the air jet holes (62) are located in the center inside the rotating barrel (3). The outer wall of the rotating barrel (3) is provided with a longan fruit inlet, and the longan fruit inlet is provided with a barrel cover assembly (31). The outer wall of the rotating barrel (3) is provided with a sand inlet (32) that cooperates with the automatic sand adding mechanism (4). The sand inlet (32) can also be used as a drainage hole and an exhaust hole. The opening size of the sand inlet (32) gradually decreases from the outer wall of the rotating barrel (3) to the inner wall of the rotating barrel (3). The rotating barrel (3) is symmetrically fixed with fixed shafts (33) at opposite ends. The frame (1) is equipped with a first seated bearing (34). The fixed shaft (33) is rotatably connected to the first seated bearing (34). The automatic sand-adding mechanism (4) includes two sets of second bearings (41), which are symmetrically mounted on the frame (1). A hollow rotating shaft (42) is rotatably connected between the two sets of second bearings (41). A sand-collecting port is opened at the top of the rotating shaft (42). A rotary cylinder (43) is fixed on the frame (1). The rotary cylinder (43) is connected to one end of the rotating shaft (42) through a coupling (45) and a connecting shaft (46).

2. The integrated equipment for soaking, shaking, rubbing, and drying fresh longan fruit according to claim 1, characterized in that: A proportional flow valve (8) is provided between the drying pipe (61) and the hot air blower (7).

3. The integrated equipment for soaking, shaking, rubbing, and drying fresh longan fruit according to claim 1, characterized in that: The rotating barrel (3) is symmetrically provided with silicone heat insulation plates (9) on the inner walls at opposite ends. Several silicone sanding and rubbing reinforcing strips (10) are provided at equal angles in the circumferential direction of the inner wall of the cylindrical surface of the rotating barrel (3). The cross-sectional shape of the silicone sanding and rubbing reinforcing strips (10) is rectangular. The two corners of the silicone sanding and rubbing reinforcing strips (10) away from the inner wall of the rotating barrel (3) are provided with 45-degree chamfers.

4. The integrated equipment for soaking, shaking, rubbing, and drying fresh longan fruit according to claim 1, characterized in that: The drive mechanism (2) includes a drive motor (21), a reducer (22), a drive sprocket (23), a driven sprocket (24), and a chain (25). The reducer (22) is mounted on the frame (1). The input shaft of the reducer (22) is connected to the drive motor (21), and the output shaft of the reducer (22) is connected to the drive sprocket (23). The driven sprocket (24) is mounted on the outer wall of the fixed shaft (33). The drive sprocket (23) and the driven sprocket (24) are connected by a chain (25).

5. The integrated equipment for soaking, shaking, rubbing, and drying fresh longan fruit according to claim 1, characterized in that: The automatic water injection mechanism (5) includes a water pump (51) and a water tank (52). The water tank (52) is placed on the frame (1). The water pump (51) is installed on the top of the water tank (52). The water pump (51) is connected to the water tank (52). The water pump (51) is connected to a water hose (53). A telescopic cylinder (54) is installed on the frame (1). A water inlet block (55) is fixedly connected to the telescopic end of the telescopic cylinder (54). One end of the water hose (53) is connected to the water inlet block (55). A leak-proof rubber block (56) is installed on the side of the water inlet block (55) near the rotating barrel (3) by bolts. A water inlet pipe assembly (57) is provided on the side wall of the rotating barrel (3) and is in close contact with the leak-proof rubber block (56).

6. The integrated equipment for soaking, shaking, rubbing, and drying fresh longan fruit according to claim 5, characterized in that: The water inlet pipe assembly (57) includes four sets of guide screws (571), and a limiting disk (572) is fixedly connected to the outer wall of the four sets of guide screws (571). The inner cavity of the limiting disk (572) is slidably connected to the water inlet pipe (573), and one end of the water inlet pipe (573) passes through the side wall of the rotating barrel (3).

7. The method of applying the integrated equipment for soaking, shaking, rubbing, and drying fresh longan fruit according to any one of claims 1-6, characterized in that: The application method includes the following steps: S1: Power on and set the operating parameters, and check whether the rotating barrel (3), automatic sand adding mechanism (4) and automatic water injection mechanism (5) are in their original positions; S2: Add fresh longan fruit into the rotating barrel (3) and add a certain amount of sand into the automatic sand adding mechanism (4); S3: Water immersion: Water is injected into the rotating barrel (3) through the automatic water injection mechanism (5) and soaked for a specified time; S4: After soaking, start the drive mechanism (2) to drive the rotating barrel (3) to rotate 180 degrees to drain the water and enter the water tank. After draining, the rotating barrel (3) rotates 180 degrees to return to its original position. S5: Add sand: The automatic sand adding mechanism (4) rotates 180 degrees to add sand into the rotating barrel (3). After the sand adding is completed, the automatic sand adding mechanism (4) returns to its original position. S6: Shaking and rubbing: Start the drive mechanism (2) to drive the rotating barrel (3) to rotate at the set frequency and time to shake and rub the skin for the set time; S7: Drying: After the sand-scraping process is completed, start the hot air blower (7), the proportional flow valve (8) and the drive mechanism (2) to drive the rotating barrel (3) to rotate intermittently while receiving hot air spray. The humid exhaust gas is discharged from the sand inlet and the drying process continues until the set time is reached. S8: Stop and unload: Open the lid of the rotating barrel (3), unload the dried longan and drop it into the discharge hopper assembly with screen holes, separate the sand and dried longan and put it into a basket, complete the washing, shaking and wiping of fresh longan fruit and drying, and wait for the next cycle.

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