Mudflat shellfish harvesting screening shovel device and harvesting method

Abstract

The invention discloses a mud flat shellfish harvesting screening shovel device and a harvesting method. The mud flat shellfish harvesting screening shovel device comprises a supporting frame, a vibration screening shovel assembly, a first spiral rotating rolling brush, a vibration driving device, a soil breaking air knife and an air supply device, and the vibration screening shovel assembly comprises a first screening frame, screening strips and a soil penetrating shovel head; the first spiral rotating rolling brush is rotatably mounted in the supporting frame; the vibration driving device is used for driving the first screen frame to vibrate; the soil breaking air knife is used for carrying out intermittent soil breaking and pre-loosening on the unharvested mud flat substrate; the air supply device can supply an air source; in the harvesting operation, the soil breaking air knife can discharge high-pressure air at intervals and conduct intermittent soil breaking and pre-loosening on unharvested mud flat substrates, at the moment, the vibration driving device drives the first screen frame to vibrate, the first screen frame and the multiple screen bars screen the mud flat substrates, the soil breaking and pre-loosening substrates can reduce the resistance of the first screen frame, and the soil breaking and pre-loosening effect is improved. Therefore, the overall screening efficiency can be improved, and then the harvesting efficiency of the overall equipment is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of beach shellfish harvesting equipment, and in particular relates to a beach shellfish harvesting screening shovel device and a harvesting method. Background Art

[0002] Shellfish farming is one of the leading industries in China's fishery industry and has made great contributions to the development of China's fishery economy. As one of the main aquaculture economic shellfish, the four-cornered clam has a wide aquaculture area and a large output. The tidal flats are the main habitat of the four-cornered clam, and the tidal flat harvesting environment is very difficult. Harvesting operations are an important part of the four-cornered clam farming process. The harvesting method, efficiency, cost, effect and other factors of the four-cornered clam will directly affect the aquaculture output and income of the clam.

[0003] At present, the Chinese utility model patent publication number applied by our team in the early stage is CN218389436U, which discloses a tidal flat shellfish harvesting device with coordinated operation of brush and screen. The tidal flat shellfish harvesting device is composed of two vibrating screens. Two sets of eccentric devices respectively drive two screening frames to perform vibrating screening actions, which can not only separate shellfish, but also allow the shellfish on the bottom of the screening frame to be thrown backwards, thereby realizing the harvesting of shellfish. In addition, our team has also applied for a Chinese utility model patent with publication number CN221329915U in the early stage, which discloses a combine harvester for harvesting four-cornered clams on tidal flats, including a harvesting mechanism and a crawler traveling mechanism for harvesting four-cornered clams. The harvesting mechanism is arranged at the front end of the crawler traveling mechanism. The harvesting mechanism in the combine harvester is the brush-screen collaborative tidal flat shellfish harvesting device in publication number CN218389436U. The crawler traveling mechanism can drive the harvesting mechanism to harvest the four-cornered clams in the tidal flat bottom. However, during the harvesting process, because the harvesting shovel needs to go deep into the position where the tidal flat bottom is 50-100 mm thick, the resistance between the harvesting shovel and the tidal flat bottom is large, resulting in low efficiency of the overall screening process, which seriously affects the harvesting efficiency. Summary of the invention

[0004] The purpose of the present invention is to provide a shovel device and a method for harvesting tidal flat shellfish, aiming to solve the above-mentioned problems.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is as follows:

[0006] In a first aspect, the present application provides a shovel device for harvesting shellfish on a tidal flat, comprising:

[0007] Support frame;

[0008] A vibrating screen shovel assembly, comprising a first screen frame, a plurality of screen bars and a plurality of earth-entering shovel heads, wherein the first screen frame is rotatably mounted to the bottom of the support frame, a plurality of earth-entering shovel heads are installed at intervals on the first end of the first screen frame, and a plurality of screen bars are installed at intervals on the first screen frame;

[0009] A first spiral rotating roller brush is rotatably mounted inside the support frame, and the first spiral rotating roller brush is located on top of the plurality of sieve bars, and is used for transferring, cutting, and evacuating the tidal flat substrate and shellfish onto the plurality of sieve bars;

[0010] a vibration driving device, drivingly connected to the first screen frame, for driving the first screen frame to vibrate, so as to achieve vibration screening of the screen bars;

[0011] A soil-breaking air knife installed at the bottom of the first end of the first screen frame, used to discharge high-pressure gas at intervals and to perform soil-breaking and pre-loosening of unharvested tidal flat bottom materials at intervals, so as to reduce the resistance of the first screen frame;

[0012] The air supply device is connected with the air supply end of the soil-breaking air knife and is used for intermittently supplying the compressed air required for the soil-breaking air knife to break the soil.

[0013] In a possible implementation manner, a mounting plate is provided at the first end of the first screen frame, and the soil-breaking air knife is mounted to the bottom of the mounting plate;

[0014] A soil-breaking air supply cavity is provided inside the assembly plate, and a mounting interface for mounting the soil-breaking air knife is provided at the bottom of the assembly plate. The mounting interface is communicated with the soil-breaking air supply cavity, and the air supply end of the soil-breaking air knife is plugged into the mounting interface;

[0015] An air supply interface 1 connected to the ground-breaking air supply cavity is fixedly mounted on one side of the assembly plate. The air supply interface 1 is connected to the air supply device and is used to supply ground-breaking compressed air to the ground-breaking air knife.

[0016] In a possible implementation manner, a plurality of screen bar installation grooves are provided on one side surface of the assembly plate along the length direction, and the first end of each of the screen bars is plugged into the screen bar installation groove;

[0017] A blowing nozzle is installed at the bottom of each of the sieve bars, which can continuously output gas to the gaps formed by the broken tidal flat bottom material, so that the gas fills the gaps of the broken tidal flat bottom material to ensure the looseness of the tidal flat bottom material after breaking the soil;

[0018] Each of the sieve bars is provided with a blowing nozzle air supply cavity 1, and the inlet end of the blowing nozzle is connected to the blowing nozzle air supply cavity 1;

[0019] The interior of the assembly plate is provided with a second air supply cavity for a blowing nozzle, and the second air supply cavity for the blowing nozzle is connected to a plurality of the screen bar mounting grooves; a second air supply interface connected to the second air supply cavity for the blowing nozzle is fixedly installed on one side of the assembly plate, and the second air supply interface is connected to the air supply device, and is used for allowing the continuously output gas to be discharged along the second air supply cavity for the blowing nozzle, the screen bar mounting grooves, the first air supply cavity for the blowing nozzle and the blowing nozzle.

[0020] In a possible implementation manner, a mounting cover is fixedly mounted on the second end of each of the screen bars, a rotating screen bar is sealingly and rotatably mounted inside the mounting cover, and the rotating screen bar can rotate intermittently;

[0021] A rotating screen bar air supply cavity is provided inside the assembly plate, and the rotating screen bar air supply cavity is located on one side of the blowing nozzle air supply cavity 2, and an air supply interface 3 connected to the rotating screen bar air supply cavity is fixedly installed on one side of the assembly plate, and the air supply interface 3 is connected to the air supply device;

[0022] The rotating screen bar air supply cavity is connected with a plurality of ventilation pipes, each of which passes through the second air supply cavity of the blowing nozzle, the screen bar installation groove and the inner cavity of the screen bar and extends into the installation cover;

[0023] A nozzle is provided at the first end of the rotating screen bar, and the nozzle is rotatably mounted in the mounting cover through a bearing seal. The interior of the rotating screen bar is hollow, and the nozzle is communicated with the inner cavity of the rotating screen bar.

[0024] The inner cavity of the rotating screen bar is fixedly connected with a spiral blade, and the second end of the rotating screen bar is installed with a deflation one-way valve. The gas output from the ventilation pipe interval can flow along the spiral direction of the spiral blade and be discharged from the deflation one-way valve, which can drive the spiral blade and the rotating screen bar to rotate relative to the screen bar, so as to realize vibration-rotation linkage screening of shellfish and bottom sediment.

[0025] In a possible implementation, a plurality of the rotating screen bars are arranged in pairs, and the spiral directions of the two spiral blades in the two rotating screen bars in a pair are arranged in opposite directions;

[0026] When the gas in the ventilation pipe flows out along the spiral direction of the spiral blade, the two rotating screen bars can be rotated in opposite directions to achieve vibration-rotation linkage screening of shellfish and bottom sediment.

[0027] In a possible implementation manner, a longitudinal support plate is fixedly connected to the interior of the first screen frame, and a plurality of the screen bars are installed at intervals on the top surface of the support plate;

[0028] A plurality of the rotating screen bars are located on one side of the support plate, and a partition plate is provided between the rotating screen bars arranged in pairs, one end of the partition plate is fixedly connected to the support plate, and the partition plate is used to separate the rotating screen bars arranged in pairs. The shellfish and block bottom material screened by the screen bars for the first time can enter between the rotating screen bars arranged in pairs under the vibration of the first screen frame for a second vibration-rotation linkage screening.

[0029] In a possible implementation manner, a second vibrating screen is provided on one side of the bottom of the first screen frame, the second vibrating screen is rotated into the supporting frame, and the second vibrating screen is mounted on the bottom of the first screen frame;

[0030] A second spiral rotating brush is rotatably installed in the support frame, and the second spiral rotating brush is located on the top of the second vibrating screen, and is used to transfer, cut and evacuate the shellfish and block bottom material after the second vibration-rotation linkage screening to the second vibrating screen;

[0031] The vibration drive device is transmission-connected to the second vibration screen to drive the second vibration screen to vibrate, so as to achieve a third vibration screening of shellfish and blocky bottom matter after the second vibration-rotation linkage screening.

[0032] In a possible embodiment, a thread groove arranged along the length direction is opened on the outer peripheral surface of each of the rotating screen bars, and when the two rotating screen bars arranged in a pair rotate in opposite directions, they are used to drive the blocky bottom material and shellfish to move up and screen along the direction of the thread groove.

[0033] In a possible embodiment, a plurality of inclined slots are provided at intervals on the outer peripheral surface of each of the rotating screen bars, and the openings of the plurality of inclined slots are toward the second end of the rotating screen bar. When the ventilation pipe supplies air to the inner cavity of the rotating screen bar to drive the rotating screen bar to rotate at intervals, the air flow can be discharged along the inclined slots to push the blocky bottom material and shellfish between the two pairs of the rotating screen bars to move up along the length direction of the rotating screen bar and be screened.

[0034] In a possible embodiment, the air supply device includes a high-pressure air pump and a high-pressure air tank 1, the high-pressure air pump is connected to the high-pressure air tank 1 through a pipeline, and is used to supply air to the high-pressure air tank 1, the output end of the high-pressure air tank 1 is connected to a pulse solenoid valve through a pipeline, the output end of the pulse solenoid valve is installed with a conversion joint, and the air inlet of the air supply interface 1 is connected to the conversion joint through a connecting pipeline 1, and is used to intermittently provide high-pressure airflow to the earth-breaking air knife;

[0035] The air inlet of the air supply interface three is connected with the conversion joint through a connecting pipe two, and a pressure relief valve is installed on the connecting pipe two for intermittently providing low-pressure airflow to the inner cavity of the rotating screen bars so that a plurality of the rotating screen bars can intermittently rotate for screening.

[0036] In a possible implementation manner, the gas supply device further includes a second high-pressure gas tank, and the high-pressure gas pump is connected to the second high-pressure gas tank through a pipeline, so as to supply gas to the second high-pressure gas tank;

[0037] The air inlet of the air supply interface 2 is connected to the air outlet of the high-pressure gas tank 2 through a connecting pipeline 3, and a multi-stage pressure relief valve assembly is installed on the connecting pipeline 3 to continuously output a low-pressure airflow to the blowing nozzle.

[0038] In a second aspect, the present application further provides a method for harvesting tidal flat shellfish, the method comprising the tidal flat shellfish harvesting screening shovel device provided in the first aspect above; wherein the harvesting method comprises the following steps:

[0039] S1, installing the shovel device for collecting and screening shovelling shellfish on the beach to the driving device, and driving the shovel device for collecting and screening shovelling shellfish on the beach to move based on the driving device;

[0040] S2. Adjust the height of the first screen frame so that several shovel heads are buried in the bottom of the tidal flat to a depth of 30-100 mm;

[0041] S3, the air supply device drives the soil-breaking air knife to start at intervals, breaking and pre-loosening the unharvested mudflat bottom material in front of the shovel head, and the first spiral rotating roller brush transfers, cuts, and evacuates the soil-breaking and pre-loose mudflat bottom material and shellfish onto a plurality of screen bars;

[0042] S4, the blowing nozzle continuously outputs gas between the gaps formed by the pre-loose tidal flat bottom material after breaking the soil, so that the gas fills the gaps of the tidal flat bottom material, so that the tidal flat bottom material continues to be loose after breaking the soil. At the same time, a number of screen bars vibrate and screen the bottom material and shellfish, and the smaller block bottom material and juvenile shellfish are screened back to the surface of the tidal flat, and the block bottom material and shellfish are vibrated onto the rotating screen bars in pairs;

[0043] S5, the air supply device drives the paired rotating screen bars to rotate in opposite directions and start at intervals, and the shellfish and bottom material between the paired rotating screen bars are subjected to a second vibration-rotation linkage screening;

[0044] S6. During the rotation of the second spiral rotating roller brush, the shellfish and bulk bottom material after the second vibration-rotation linkage screening are transferred, cut and evacuated to the second vibration screen. The second vibration screen will perform a third vibration screening on the shellfish and bulk bottom material after the second vibration-rotation linkage screening, and transport the adult shellfish to the tail of the second vibration screen to obtain the shellfish harvest.

[0045] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0046] In the present invention, during the harvesting operation, the soil-breaking air knife can discharge high-pressure gas at intervals and perform intermittent soil breaking and pre-loosening of the unharvested tidal flat bottom. At this time, the vibration drive device drives the first screen frame to vibrate, and the first screen frame and a plurality of screen bars screen the tidal flat bottom. The soil-breaking and pre-loosening bottom can reduce the resistance of the first screen frame, thereby improving the overall screening efficiency, and then improving the harvesting efficiency of the overall equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] Figure 1 It is a structural schematic diagram of the present invention;

[0048] Figure 2 It is a schematic diagram of the installation structure of the first screen frame and the second vibrating screen in the present invention;

[0049] Figure 3 It is a structural schematic diagram of the vibrating screen shovel assembly in the present invention;

[0050] Figure 4 For the present invention Figure 3 The enlarged schematic diagram at A in the middle;

[0051] Figure 5 It is a schematic diagram of the separation of the screen bars and the rotating screen bars in the present invention;

[0052] Figure 6 A schematic diagram of the rotational orientation of two pairs of rotating screen bars in the present invention;

[0053] Figure 7 It is a schematic diagram of the gas supply pipeline of the gas supply device of the present invention;

[0054] Figure 8 It is a front view of two pairs of rotating screen bars in the present invention.

[0055] Markings in the figure:

[0056] 1. Support frame; 100. Vibration drive device;

[0057] 2. Vibrating screen shovel assembly; 201. first screen frame; 202. screen bars; 203. earth-entering shovel head; 204. second vibrating screen;

[0058] 200, a first spiral rotating roller brush;

[0059] 3. Soil-breaking air knife; 4. Assembly plate; 5. Soil-breaking air supply cavity; 6. Air supply interface one; 7. Screen bar installation groove; 8. Air blowing nozzle; 9. Air supply cavity one for air blowing nozzle; 10. Air supply cavity two for air blowing nozzle; 11. Air supply interface two; 12. Installation cover; 13. Rotating screen bars; 14. Rotating screen bar air supply cavity; 15. Ventilation pipe; 16. Connecting nozzle; 17. Air supply interface three; 18. Spiral blade; 19. Air relief one-way valve; 20. Support plate; 21. Spacer plate; 22. Second spiral rotating roller brush; 23. High-pressure air pump; 24. High-pressure gas tank one; 25. Pulse solenoid valve; 26. Conversion joint; 27. Connecting pipeline one; 28. Connecting pipeline two; 29. ​​Pressure relief valve; 30. High-pressure gas tank two; 31. Connecting pipeline three; 32. Threaded groove; 33. Oblique groove. DETAILED DESCRIPTION

[0060] In order to make the objectives, technical solutions and advantages of the present application clearer, the implementation methods of the present application will be further described in detail below in conjunction with the accompanying drawings.

[0061] use Figure 1 . Figure 1 It is a schematic diagram of the structure of the present invention. A shovel device for harvesting tidal flat shellfish is described. The shovel device for harvesting tidal flat shellfish can be used for harvesting shells, such as four-cornered clams, clams, razor clams and other shellfish. Alternatively, the shoal shellfish harvesting shovel device can also be used for harvesting tuber crops buried in the substrate, such as potatoes, sweet potatoes, peanuts and other crops. The following only describes the harvesting conditions and scenarios of shellfish, and other types of harvesting conditions are not described one by one.

[0062] The shovel device for collecting tidal flat shellfish can be installed in a combined harvester for collecting tidal flat clams disclosed in patent CN221329915U to achieve combined harvesting of shellfish. In addition, the shovel device for collecting tidal flat shellfish is a further improvement of patent publication number CN218389436U, and has the same structure and principle. If the structure and principle are not clearly described in the following description, please refer to the structure and principle in patent CN218389436U for details.

[0063] Reference Figure 1-Figure 3 As shown, the overall structure of the shovel device for collecting shellfish on the beach is described. Figure 1 It is a structural schematic diagram of the present invention. Figure 2 It is a schematic diagram of the installation structure of the first screen frame 201 and the second vibrating screen 204 in the present invention. Figure 3 It is a schematic structural diagram of the vibrating screen shovel assembly 2 in the present invention.

[0064] The shovel device for collecting tidal flat shellfish comprises a support frame 1, a vibrating shovel assembly 2, a first spiral rotating roller brush 200, a vibration driving device 100, a soil breaking air knife 3 and an air supply device, wherein:

[0065] The support frame 1 includes two connecting plates and a support rod body that are spaced apart. Both ends of the support rod body are fixedly mounted to the top of the two connecting plates to form a frame structure with a specific accommodating space, which can be used to install the vibrating screen shovel assembly 2, the first spiral rotating roller brush 200 and other components.

[0066] The vibrating screen shovel assembly 2 is mounted on the first end of the supporting frame 1 and is used for the first screening of the mudflat bottom and shellfish. The vibrating screen shovel assembly 2 includes a first screen frame 201, a plurality of screen bars 202 and a plurality of shovel heads 203. The first screen frame 201 can be rotatably mounted to the bottom of the supporting frame 1. The specific structure and principle of the rotatable mounting can be referred to patent CN218389436U for details.

[0067] A plurality of shovel heads 203 are installed at intervals on the first end of the first screen frame 201, and a plurality of screen bars 202 are installed at intervals on the first screen frame 201. When the position of the vibrating screen shovel assembly 2 is adjusted to move downward, the shovel heads 203 can be buried in a position where the tidal flat bottom is 50-100 mm thick.

[0068] The first spiral rotating roller brush 200 can be rotatably installed inside the supporting frame 1, and the first spiral rotating roller brush 200 is located on the top of several screen bars 202. Driving wheels are installed at both ends of the first spiral rotating roller brush 200, and the driving wheel chain is driven by a driving motor. The first spiral rotating roller brush 200 can be automatically rotated, and is used to transfer, cut, and evacuate the mudflat bottom and shellfish to several screen bars 202.

[0069] The vibration driving device 100 is connected to the first screen frame 201 by transmission, and is used to drive the first screen frame 201 to vibrate, so as to achieve vibration screening of the screen bars 202. The vibration driving device 100 includes a driving motor and a crank connecting rod mechanism 1, the driving motor drives the connecting rod in the crank connecting rod mechanism 1 to move back and forth, and the connecting rod drives the first screen frame 201 to vibrate. The connection structure and working principle between the vibration driving device 100 and the first screen frame 201 can be referred to patent CN218389436U for details.

[0070] The soil-breaking air knife 3 is installed at the bottom of the first end of the first screen frame 201. When the mudflat shellfish harvesting screen shovel device performs harvesting operations, the soil-breaking air knife 3 is located at the front end and buried in the mudflat bottom. Regarding the specific structure of the soil-breaking air knife 3, a one-way valve is installed on the air outlet of the soil-breaking air knife 3, which can be used for one-way discharge of high-pressure gas to prevent the mud in the mudflat bottom from clogging the soil-breaking air knife 3.

[0071] The air supply device is connected to the air supply end of the ground-breaking air knife 3 and is used for intermittently supplying the compressed air required by the ground-breaking air knife 3 to break the soil.

[0072] In this embodiment, during the harvesting operation, the soil-breaking air knife 3 and several earth-entering shovel heads 203 are buried in the tidal flat bottom. When the soil-breaking air knife 3 is started, the high-pressure gas can be discharged at intervals, and the unharvested tidal flat bottom can be pre-loosened at intervals. The duration of the interval can be pre-set according to the travel speed; at this time, the vibration drive device 100 drives the first screen frame 201 to vibrate, and the first screen frame 201 and several screen bars 202 screen the tidal flat bottom. The pre-loosened bottom can reduce the resistance of the first screen frame 201, thereby improving the overall screening efficiency, and then improving the harvesting efficiency of the overall equipment.

[0073] In some embodiments, Figure 4 shown. Figure 4 For the present invention Figure 3 In order to achieve the purpose of installing the soil-breaking air knife 3 on the first screen frame 201 , a mounting plate 4 is provided at the first end of the first screen frame 201 , and the soil-breaking air knife 3 is mounted to the bottom of the mounting plate 4 .

[0074] In order to realize the supply of air source to the ground-breaking air knife 3, a supply structure for supplying air to the ground-breaking air knife 3 is integrated on the assembly plate 4. Specifically, a ground-breaking air supply cavity 5 is provided inside the assembly plate 4, and a mounting interface for installing the ground-breaking air knife 3 is provided at the bottom of the assembly plate 4. The mounting interface is connected to the ground-breaking air supply cavity 5, and the air supply end of the ground-breaking air knife 3 is plugged into the mounting interface.

[0075] In order to supply air source to the inside of the ground-breaking air supply cavity 5, so as to realize the purpose of supplying air source to the ground-breaking air knife 3. An air supply interface 6 connected to the ground-breaking air supply cavity 5 is fixedly installed on one side of the assembly plate 4. The air supply interface 6 is connected to the air supply device. When the air supply device is started, it can be used to supply ground-breaking compressed air to the ground-breaking air knife 3 at intervals, so that the ground-breaking air knife 3 can achieve the purpose of pre-loosening the bottom of the mudflat.

[0076] In some embodiments, Figure 4-Figure 5 shown. Figure 4 For the present invention Figure 3 A is an enlarged schematic diagram. Figure 5 The figure is a schematic diagram of the disassembly of the screen bar 202 and the rotating screen bar 13 in the present invention. A plurality of screen bar installation grooves 7 are provided on one side surface of the assembly plate 4 along the length direction, and the first end of each screen bar 202 is plugged into the screen bar installation groove 7.

[0077] A blowing nozzle 8 is installed at the bottom of each screen bar 202, and a one-way valve is installed at the air outlet end of the blowing nozzle 8 to avoid backflow of sand. The number of the blowing nozzles 8 can be multiple, and the multiple blowing nozzles 8 can continuously output gas between the gaps formed by the broken tidal flat substrate, so that the gas fills the gaps in the broken tidal flat substrate, which can ensure the looseness of the tidal flat substrate after breaking the soil, and then when the first end part of the first screen frame 201 is subjected to vibration harvesting operation, the screening efficiency can be further improved.

[0078] In order to realize the supply of air source to several blowing nozzles 8. A blowing nozzle air supply cavity 9 is opened inside each screen bar 202, and the inlet end of the blowing nozzle 8 is connected to the blowing nozzle air supply cavity 9. A blowing nozzle air supply cavity 2 10 is arranged inside the assembly plate 4, and the blowing nozzle air supply cavity 2 10 is connected to several screen bar mounting grooves 7; a gas supply interface 2 11 connected to the blowing nozzle air supply cavity 2 10 is fixedly installed on one side of the assembly plate 4, and the gas supply interface 2 11 is connected to the air supply device. When the air supply device is started, the continuously output gas can be discharged along the blowing nozzle air supply cavity 2 10, the screen bar mounting groove 7, the blowing nozzle air supply cavity 9 and the blowing nozzle 8, thereby realizing the continuous output of gas from the blowing nozzle 8, filling the gaps in the broken mudflat bottom with gas, thereby ensuring the looseness of the mudflat bottom after breaking the ground.

[0079] In some embodiments, Figure 5-Figure 6 shown. Figure 5 It is a schematic diagram of the disassembly of the screen bars 202 and the rotating screen bars 13 in the present invention. Figure 6 The figure is a schematic diagram of the rotational orientation of the two paired rotating screening bars 13 in the present invention. The second ends of the plurality of screening bars 202 are provided with a second-stage rotating screening assembly for further screening the mudflat bottom material and shellfish after screening by the screening bars 202.

[0080] Specifically, the second end of each screen bar 202 is fixedly installed with a mounting cover 12, and the internal sealing rotation of the mounting cover 12 is rotatably installed with rotating screen bars 13. The rotating screen bars 13 can rotate at intervals. The rotating rotating screen bars 13 can perform vibration-rotation linkage screening on shellfish and bottom sediments, thereby further improving the screening efficiency.

[0081] In order to realize the automatic rotation function of the rotating screen bar 13 at intervals, a rotating screen bar air supply cavity 14 is provided inside the assembly plate 4, and the rotating screen bar air supply cavity 14 is located on one side of the blowing nozzle air supply cavity 2 10, and a gas supply interface 3 17 connected to the rotating screen bar air supply cavity 14 is fixedly installed on one side of the assembly plate 4, and the gas supply interface 3 17 is connected to the gas supply device.

[0082] The rotating screen bar air supply cavity 14 is connected to a plurality of ventilation pipes 15 , each ventilation pipe 15 penetrates the blowing nozzle air supply cavity 2 10 , the screen bar installation groove 7 and the inner cavity of the screen bar 202 and extends into the installation cover body 12 .

[0083] A nozzle 16 is provided at the first end of the rotating screen bar 13, and the nozzle 16 is rotatably mounted in the mounting cover 12 through a bearing seal. The interior of the rotating screen bar 13 is hollow, and the nozzle 16 is connected to the inner cavity of the rotating screen bar 13. A spiral blade 18 is fixedly connected to the inner cavity of the rotating screen bar 13, and a deflation one-way valve 19 is installed at the second end of the rotating screen bar 13.

[0084] When harvesting operations are being carried out, the screen bars 202 vibrate and screen the mudflat bottom material and shellfish. At this time, the air supply device supplies air source to the air supply interface 3 17 at intervals, and the air flow can be transmitted along the air supply interface 3 17, the rotating screen bar air supply cavity 14 and the ventilation pipe 15. The gas output from the ventilation pipe 15 at intervals can flow along the spiral direction of the spiral blade 18 and be discharged from the air release one-way valve 19, which can drive the spiral blade 18 and the rotating screen bar 13 to rotate relative to the screen bar 202, so as to realize vibration-rotation linkage screening of shellfish and bottom material.

[0085] In some embodiments, Figure 6 shown. Figure 6 The figure is a schematic diagram of the rotational orientation of the two pairs of rotating screen bars 13 in the present invention. In order to achieve the purpose of the rotating screen bars 13 to perform a stable second screening of the mudflat substrate and shellfish. A plurality of rotating screen bars 13 are arranged in pairs, and the spiral directions of the two spiral blades 18 in the two pairs of rotating screen bars 13 are arranged in opposite directions. When the gas in the vent pipe 15 flows out along the spiral direction of the spiral blade 18, the two rotating screen bars 13 can be rotated in opposite directions to achieve vibration-rotation linkage screening of shellfish and substrate.

[0086] Because the two pairs of rotating screen bars 13 rotate in opposite directions, and the rotating screen bars 13 adjacent to the paired rotating screen bars 13 rotate in the same direction, it is easy to cause the shellfish to be squeezed and crushed. In order to avoid the above situation, a partition plate 21 is provided between the rotating screen bars 13 arranged in pairs.

[0087] Regarding the installation structure of the partition plate 21, specifically, a longitudinal support plate 20 is fixedly connected inside the first screen frame 201, and a plurality of screen bars 202 are installed at intervals on the top surface of the support plate 20. A plurality of rotating screen bars 13 are located on one side of the support plate 20, and a partition plate 21 is arranged between the rotating screen bars 13 arranged in pairs, and one end of the partition plate 21 is fixedly connected to the support plate 20.

[0088] During harvesting operations, the partition plates 21 are used to separate the rotating screen bars 13 in pairs. The shellfish and block substrate screened out for the first time by the screen bars 202 can enter between the rotating screen bars 13 arranged in pairs under the vibration of the first screen frame 201 for a second vibration-rotation linkage screening. This can improve the screening efficiency on the one hand, and on the other hand, the partition plates 21 can prevent the shellfish from being squeezed and crushed during the rotation process.

[0089] In some embodiments, Figure 8 shown. Figure 8 It is a front view of two pairs of rotating screen bars 13 in the present invention. Because the first screen frame 201 is tilted as a whole, the mudflat substrate and shellfish are screened from a low place to a high place. In order to avoid the screened substrate and shellfish from moving slowly and stagnating upward. A thread groove 32 is provided on the outer peripheral surface of each rotating screen bar 13, and the thread groove 32 is arranged along the length direction of the rotating screen bar 13. The spiral directions of the thread grooves 32 on the two pairs of rotating screen bars 13 are oppositely arranged, and the rotation track direction of the thread groove 32 can be the same as the rotation direction of the rotating screen bar 13. When the screen bars 202 vibrate and screen the mudflat substrate and shellfish between the paired rotating screen bars 13, and the two paired rotating screen bars 13 rotate in opposite directions, the thread grooves 32 can drive the blocky substrate and shellfish to move up and be screened along the direction of the thread grooves 32. The thread grooves 32 can provide friction for the upward screening of the substrate and shellfish. On the one hand, it can prevent the screened substrate and shellfish from moving slowly and stagnating upwards. On the other hand, it is also beneficial to improve the screening efficiency.

[0090] In some embodiments, Figure 8 shown. Figure 8 The figure is a front view of two pairs of rotating screen bars 13 in the present invention. In order to further prevent the screened substrate and shellfish from moving slowly and stagnating upward, a plurality of inclined slots 33 are provided on the outer peripheral surface of each rotating screen bar 13 at intervals, and the openings of the plurality of inclined slots 33 face the second end of the rotating screen bar 13.

[0091] When the vent pipe 15 supplies air to the intervals in the inner cavity of the rotating screen bar 13, the spiral blades 18 drive the rotating screen bar 13 to rotate at intervals, thereby driving the rotating screen bar 13 to rotate at intervals. At this time, while the rotating screen bar 13 is rotating, the airflow in the inner cavity of the rotating screen bar 13 can be discharged along the inclined slot 33, and the airflow flowing toward the second end of the rotating screen bar 13 can push the block substrate and shellfish between the two pairs of rotating screen bars 13, so that the block substrate and shellfish can move up and be screened along the length direction of the rotating screen bar 13. In this embodiment, the airflow push of the inclined slot 33 and the friction drive of the threaded groove 32 can cooperate to push the substrate and shellfish to move upward for screening, further avoiding the situation where the screened substrate and shellfish move slowly and stagnate upward, effectively improving the screening efficiency, and thus improving the overall harvesting efficiency.

[0092] In some embodiments, Figure 2 shown. Figure 2 It is a schematic diagram of the installation structure of the first screen frame 201 and the second vibrating screen 204 in the present invention. In order to perform the third-level screening of the large pieces of bottom material and shellfish on the first screen frame 201 and the rotating screen bar 13, so as to ensure that the bottom material and juvenile shellfish are completely screened off and the adult shellfish are transported to the tail of the vibrating screen. A second vibrating screen 204 is provided on one side of the bottom of the first screen frame 201, and a strip screen column is integrated in the second vibrating screen 204. The second vibrating screen 204 rotates into the supporting frame 1, and the second vibrating screen 204 is mounted on the bottom of the first screen frame 201. For details of the installation structure and working principle of the second vibrating screen 204, please refer to patent CN218389436U;

[0093] A second spiral rotating brush 22 is rotatably mounted in the support frame 1, and the second spiral rotating brush 22 is located on the top of the second vibrating screen 204. The installation structure and principle of the second spiral rotating brush 22 are detailed in patent CN218389436U. The second spiral rotating brush 22 can be used to transfer, cut, and evacuate shellfish and blocky bottom materials after the second vibration-rotation linkage screening to the second vibrating screen 204.

[0094] The vibration drive device 100 is connected to the second vibration screen 204 by transmission. The vibration drive device 100 is also provided with a crank connecting rod mechanism 2. The driving motor drives the connecting rod in the crank connecting rod mechanism 2 to move back and forth, and the connecting rod drives the second vibration screen 204 to vibrate. The installation structure between the vibration drive device 100 and the second vibration screen 204 is detailed in patent CN218389436U. The vibration drive device 100 drives the second vibration screen 204 to vibrate through the crank connecting rod structure to achieve the third vibration screening after the second vibration-rotation linkage screening of shellfish and blocky bottom materials.

[0095] In some embodiments, Figure 7 shown. Figure 7 Schematic diagram of the air supply pipeline of the air supply device in the present invention. The air supply device includes a high-pressure air pump 23 and a high-pressure air tank 24. The high-pressure air pump 23 and the high-pressure air tank 24 can be installed on the travel drive device.

[0096] The high-pressure air pump 23 is connected to the high-pressure gas tank 24 through a pipeline, and is used to supply air to the high-pressure gas tank 24. The output end of the high-pressure gas tank 24 is connected with a pulse solenoid valve 25 through a pipeline, and the output end of the pulse solenoid valve 25 is installed with a conversion joint 26. The air inlet of the air supply interface 6 is connected with the conversion joint 26 through a connecting pipeline 27, and is used to intermittently provide high-pressure airflow to the ground-breaking air knife 3, so that the ground-breaking air knife 3 has the function of intermittent ground-breaking and pre-loosening.

[0097] The air inlet of the air supply interface three 17 is connected with the conversion joint 26 through the connecting pipe two 28, and a pressure relief valve 29 is installed on the connecting pipe two 28. The pressure relief valve 29 can provide high-pressure gas to the high-pressure air pump 23 for pressure relief, and is used to intermittently provide low-pressure airflow to the inner cavity of the rotating screen bars 13, so that a plurality of rotating screen bars 13 can intermittently rotate for screening.

[0098] In order to intelligently control the coordinated operation of the high-pressure air pump 23, the high-pressure gas tank 24 and the pulse solenoid valve 25, a PLC intelligent control system can be set on the tidal flat shellfish harvesting and screening shovel device to realize the above-mentioned intelligent control function.

[0099] In some embodiments, Figure 7 shown. Figure 7 Schematic diagram of the air supply pipeline of the air supply device in the present invention. In order to supply the air source to the blowing nozzle 8. The air supply device also includes a high-pressure gas tank 2 30, and the high-pressure air pump 23 is connected to the high-pressure gas tank 2 30 through a pipeline to supply air to the high-pressure gas tank 2 30.

[0100] The air inlet of the air supply interface 11 is connected with the air outlet of the high-pressure gas tank 30 through a connecting pipe 31. A multi-stage pressure relief valve assembly is installed on the connecting pipe 31. When the high-pressure gas tank 30 delivers high-pressure gas to the connecting pipe 31, the pressure is released by the multi-stage pressure relief valve assembly. The high-pressure gas tank 30 can be used to continuously output a low-pressure airflow to the blowing nozzle 8, so that the gas fills the gaps in the broken soil of the tidal flat bottom, thereby ensuring the looseness of the tidal flat bottom after breaking the soil.

[0101] The embodiment of the present invention also provides a method for harvesting tidal flat shellfish, which comprises the tidal flat shellfish harvesting screening shovel device described above. The harvesting method may specifically comprise the following steps:

[0102] S1. When performing harvesting operations, the shovel device for harvesting tidal flat shellfish is installed on the driving device, and the driving device is used to drive the shovel device for harvesting tidal flat shellfish to move, so as to achieve the purpose of mobile harvesting.

[0103] S2. Before the harvesting operation, the height of the first screen frame 201 is adjusted so that a plurality of shovel heads 203 are buried in the tidal flat substrate at a depth of 30-100 mm, so that the first screen frame 201 can dig out the tidal flat substrate and the shells in the substrate.

[0104] S3. During the vibration harvesting process of the first screen frame 201, the air supply device drives the soil-breaking air knife 3 to start at intervals, breaking and pre-loosening the unharvested mudflat bottom material in front of the shovel head 203, and the first spiral rotating roller brush 200 transfers, cuts and evacuates the pre-loosened mudflat bottom material and shellfish to a plurality of screen bars 202. On the one hand, it can improve the transmission, cutting and evacuation efficiency of the first spiral rotating roller brush 200, and on the other hand, it also improves the screening efficiency of the screen bars 202.

[0105] S4, after the tidal flat bottom is broken and pre-loosened, the air blowing nozzle 8 is started, and the air blowing nozzle 8 continuously outputs gas between the gaps formed by the broken and pre-loosened tidal flat bottom, so that the gas fills the gaps of the broken tidal flat bottom, so that the tidal flat bottom continues to be loose after breaking the soil to provide screening efficiency, and at the same time, a number of screen bars 202 vibrate and screen the bottom and shellfish, and sieve smaller block bottom and juvenile shellfish back to the surface of the tidal flat, and vibrate the block bottom and shellfish onto the rotating screen bars 13 in pairs.

[0106] S5. The air supply device drives the paired rotating screen bars 13 to rotate in opposite directions and start at intervals. The partition plates 21 are used to separate the paired rotating screen bars 13. The shellfish and block bottom matter screened out by the screen bars 202 for the first time can enter between the paired rotating screen bars 13 under the vibration of the first screen frame 201, and then the shellfish and bottom matter between the paired rotating screen bars 13 are subjected to a second vibration-rotation linkage screening.

[0107] S6. During the rotation of the second spiral rotating brush 22, the shellfish and bulk bottom material after the second vibration-rotation linkage screening are transferred, cut and evacuated to the second vibrating screen 204. The second vibrating screen 204 performs a third vibration screening on the shellfish and bulk bottom material after the second vibration-rotation linkage screening, and transports the adult shellfish to the tail of the second vibrating screen 204 to obtain the shellfish harvest.

[0108] In the description of the present invention, it should be noted that the terms "comprises", "includes" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or device including the element.

[0109] In addition, in the description of the present invention, the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limitations on the present invention.

[0110] On the other hand, it should be noted that, unless otherwise clearly specified and limited, the terms "provided on", "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

Claims

1. A shovel device for collecting shellfish on a beach, characterized in that: include: Support frame (1); A vibrating screen shovel assembly (2), comprising a first screen frame (201), a plurality of screen bars (202) and a plurality of earth-entering shovel heads (203), wherein the first screen frame (201) is rotatably mounted to the bottom of the support frame (1), a plurality of earth-entering shovel heads (203) are installed at intervals on the first end of the first screen frame (201), and a plurality of screen bars (202) are installed at intervals on the first screen frame (201); A first spiral rotating roller brush (200) is rotatably mounted inside the support frame (1), and the first spiral rotating roller brush (200) is located on top of the plurality of sieve bars (202) and is used for transferring, cutting and evacuating the tidal flat substrate and shellfish onto the plurality of sieve bars (202); a vibration driving device (100) drivingly connected to the first screen frame (201) and used for driving the first screen frame (201) to vibrate so as to achieve vibration screening of the screen bars (202); A soil-breaking air knife (3) is installed at the bottom of the first end of the first screen frame (201) and is used to discharge high-pressure gas at intervals and to perform soil-breaking and pre-loosening of unharvested tidal flat bottom materials at intervals, so as to reduce the resistance of the first screen frame (201); An air supply device is connected to the air supply end of the soil-breaking air knife (3) and is used for intermittently supplying the compressed air required for the soil-breaking air knife (3) to break the soil.

2. The shovel device for collecting and screening tidal flat shellfish according to claim 1, characterized in that: A mounting plate (4) is provided at the first end of the first screen frame (201), and the soil-breaking air knife (3) is mounted on the bottom of the mounting plate (4); A soil-breaking air supply cavity (5) is provided inside the assembly plate (4), and a mounting interface for mounting the soil-breaking air knife (3) is provided at the bottom of the assembly plate (4), the mounting interface is connected to the soil-breaking air supply cavity (5), and the air supply end of the soil-breaking air knife (3) is plugged into the mounting interface; An air supply interface (6) connected to the ground-breaking air supply cavity (5) is fixedly mounted on one side of the assembly plate (4); the air supply interface (6) is connected to the air supply device and is used to supply ground-breaking compressed air to the ground-breaking air knife (3).

3. The shovel device for collecting and screening tidal flat shellfish according to claim 2, characterized in that: A plurality of screen bar installation grooves (7) are provided on one side surface of the assembly plate (4) along the length direction, and the first end of each screen bar (202) is inserted into the screen bar installation groove (7); A blowing nozzle (8) is installed at the bottom of each of the sieve bars (202) to continuously output gas to the gaps formed by the broken tidal flat substrate, so that the gas fills the gaps in the broken tidal flat substrate to ensure the looseness of the tidal flat substrate after the soil is broken; Each of the sieve bars (202) is provided with a blowing nozzle air supply cavity (9) inside, and the inlet end of the blowing nozzle (8) is connected to the blowing nozzle air supply cavity (9); The assembly plate (4) is provided with a second air supply cavity (10) for the blowing nozzle inside, and the second air supply cavity (10) for the blowing nozzle is connected to a plurality of the screen bar mounting grooves (7); a second air supply interface (11) connected to the second air supply cavity (10) for the blowing nozzle is fixedly installed on one side of the assembly plate (4), and the second air supply interface (11) is connected to the air supply device, and is used to discharge the continuously output gas along the second air supply cavity (10) for the blowing nozzle, the screen bar mounting grooves (7), the first air supply cavity (9) for the blowing nozzle and the blowing nozzle (8).

4. The shovel device for collecting and screening tidal flat shellfish according to claim 3, characterized in that: A mounting cover (12) is fixedly mounted on the second end of each of the screen bars (202); a rotating screen bar (13) is sealingly and rotatably mounted inside the mounting cover (12); and the rotating screen bar (13) can rotate at intervals; A rotating screen bar air supply cavity (14) is provided inside the assembly plate (4), and the rotating screen bar air supply cavity (14) is located on one side of the blowing nozzle air supply cavity 2 (10); a third air supply interface (17) connected to the rotating screen bar air supply cavity (14) is fixedly installed on one side of the assembly plate (4), and the third air supply interface (17) is connected to the air supply device; The rotating screen bar air supply cavity (14) is connected to a plurality of ventilation pipes (15), each of the ventilation pipes (15) passes through the second air supply cavity (10) of the blowing nozzle, the screen bar installation groove (7) and the inner cavity of the screen bar (202) and extends into the installation cover (12); The first end of the rotating screen bar (13) is provided with a nozzle (16), and the nozzle (16) is rotatably mounted in the mounting cover (12) through a bearing seal, the interior of the rotating screen bar (13) is hollow, and the nozzle (16) is in communication with the inner cavity of the rotating screen bar (13); The inner cavity of the rotating screen bar (13) is fixedly connected with a spiral blade (18), and the second end of the rotating screen bar (13) is installed with a deflation one-way valve (19). The gas output from the ventilation pipe (15) at intervals can flow along the spiral direction of the spiral blade (18) and be discharged from the deflation one-way valve (19), which can drive the spiral blade (18) and the rotating screen bar (13) to rotate relative to the screen bar (202), so as to realize vibration-rotation linkage screening of shellfish and bottom sediment.

5. The shovel device for collecting and screening tidal flat shellfish according to claim 4, characterized in that: The plurality of rotating screen bars (13) are arranged in pairs, and the spiral directions of the two spiral blades (18) in the two rotating screen bars (13) in the pair are arranged in opposite directions; When the gas in the ventilation pipe (15) flows out along the spiral direction of the spiral blade (18), the two rotating screen bars (13) can be rotated in opposite directions to achieve vibration-rotation linkage screening of shellfish and bottom sediment.

6. The shovel device for collecting and screening tidal flat shellfish according to claim 5, characterized in that: A longitudinal support plate (20) is fixedly connected to the interior of the first screen frame (201), and a plurality of screen bars (202) are installed at intervals on the top surface of the support plate (20); A plurality of the rotating screen bars (13) are located on one side of the support plate (20), and a partition plate (21) is provided between the rotating screen bars (13) arranged in pairs. One end of the partition plate (21) is fixedly connected to the support plate (20), and the partition plate (21) is used to separate the rotating screen bars (13) arranged in pairs. The shellfish and block bottom material screened out by the screen bars (202) for the first time can enter between the rotating screen bars (13) arranged in pairs under the vibration of the first screen frame (201) for a second vibration-rotation linkage screening.

7. The shovel device for collecting and screening tidal flat shellfish according to any one of claims 4 to 6, characterized in that: A second vibrating screen (204) is provided on one side of the bottom of the first screen frame (201); the second vibrating screen (204) is rotated into the supporting frame (1), and the second vibrating screen (204) is mounted on the bottom of the first screen frame (201); A second spiral rotating brush (22) is rotatably installed in the support frame (1), and the second spiral rotating brush (22) is located on the top of the second vibrating screen (204) and is used to transfer, cut and evacuate the shellfish and blocky bottom materials after the second vibration-rotation linkage screening to the second vibrating screen (204); The vibration drive device (100) is transmission-connected to the second vibration screen (204) for driving the second vibration screen (204) to vibrate, so as to achieve a third vibration screening of shellfish and bulk substrates after a second vibration-rotation linkage screening.

8. The shovel device for collecting and screening tidal flat shellfish according to any one of claims 5 to 6, characterized in that: The outer peripheral surface of each of the rotating screen bars (13) is provided with thread grooves (32) arranged along the length direction; The spiral directions of the thread grooves (32) on the two paired rotating screen bars (13) are arranged in opposite directions; when the two paired rotating screen bars (13) rotate in opposite directions, they are used to drive the blocky bottom material and shellfish to move up along the direction of the thread grooves (32) and be screened.

9. The shovel device for collecting and screening tidal flat shellfish according to any one of claims 5 to 6, characterized in that: A plurality of inclined slots (33) are provided at intervals on the outer peripheral surface of each of the rotating screen bars (13), and the openings of the plurality of inclined slots (33) are oriented toward the second end of the rotating screen bar (13). When the ventilation pipe (15) supplies air to the inner cavity of the rotating screen bar (13) to drive the rotating screen bar (13) to rotate at intervals, the air flow can be discharged along the inclined slots (33) to push the blocky bottom material and shellfish located between the two paired rotating screen bars (13) to move up along the length direction of the rotating screen bar (13) and be screened.

10. A method for harvesting tidal flat shellfish, comprising the tidal flat shellfish harvesting screening shovel device according to claim 7, characterized in that: The harvesting method includes the following steps: S1, installing the shovel device for collecting and screening shovelling shellfish on the beach to the driving device, and driving the shovel device for collecting and screening shovelling shellfish on the beach to move based on the driving device; S2, adjusting the height of the first screen frame (201) so that a plurality of shovel heads (203) are buried in the bottom of the tidal flat to a depth of 30-100 mm; S3, the air supply device drives the soil-breaking air knife (3) to start at intervals, breaking and pre-loosening the unharvested mudflat bottom material in front of the shovel head (203), and the first spiral rotating roller brush (200) transfers, cuts, and evacuates the soil-breaking and pre-loose mudflat bottom material and shellfish onto a plurality of screen bars (202); S4, the blowing nozzle (8) continuously outputs gas between the gaps formed by the pre-loose tidal flat bottom material after breaking the soil, so that the gas fills the gaps in the tidal flat bottom material, so that the tidal flat bottom material continues to be loose after breaking the soil. At the same time, a plurality of screen bars (202) vibrate and screen the bottom material and shellfish, and the smaller block bottom material and juvenile shellfish are screened back to the surface of the tidal flat, and the block bottom material and shellfish are vibrated onto the rotating screen bars (13) in pairs; S5, the air supply device drives the paired rotating screen bars (13) to rotate in opposite directions and start at intervals, and the shellfish and bottom material between the paired rotating screen bars (13) are subjected to a second vibration-rotation linkage screening; S6. During the rotation of the second spiral rotating brush (22), the shellfish and bulk bottom material that have undergone the second vibration-rotation linkage screening are transferred, cut, and evacuated to the second vibrating screen (204). The second vibrating screen (204) performs a third vibration screening on the shellfish and bulk bottom material that have undergone the second vibration-rotation linkage screening, and transports the adult shellfish to the tail of the second vibrating screen (204) to obtain shellfish harvest.

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