A filterable autonomous underwater shellfish harvester

Abstract

The present invention discloses a selectable self-filtering underwater shellfish harvester, which includes a water pump device, a shellfish harvesting device, a shellfish cleaning device and a generator. The shellfish harvesting device includes a shellfish lifting mechanism composed of a shellfish lifter and a shellfish lifting bin, a shellfish warning mechanism and a replaceable mud filtering mechanism respectively connected to the shellfish lifting mechanism, and a shellfish collecting bin connected to the replaceable mud filtering mechanism; the shellfish cleaning device includes a spiral cleaning bin, a transmission mechanism connected to one side of the spiral cleaning bin and a water replenishing mechanism on the other side. The underwater shellfish harvester of the present invention can separate mud and shellfish by relying on the underwater shellfish harvesting device and return the shellfish seedlings to their original positions; its spiral cleaning bin and the underwater shellfish harvesting device are closely cooperated, greatly improving the speed of harvesting shellfish, and the sediment content and breakage rate are also lower. The present invention can be applied not only to shellfish harvesting in ponds and tidal flats, but also to harvesting shellfish at a depth of about 10 meters in shallow seas.

Description

Technical Field

[0001] The present invention belongs to the technical field of aquatic product harvesting mechanical devices, and particularly relates to a selectable and self-filtering underwater shellfish harvester. Background Art

[0002] China's ocean area is about 3 million square kilometers, and the tidal flat area is more than 2.17 million hectares, ranking among the top in the world in terms of occupied area. China's aquatic product output mainly comes from aquaculture, which is one of the fastest-growing and most stable industries in China's agricultural structure. Aquaculture has made important contributions to solving the problem of difficult access to seafood for urban and rural residents in China, increasing the supply of high-quality animal protein, improving the national nutrition and health level, and ensuring China's food security.

[0003] In terms of product output, shellfish products account for a relatively large proportion in China's marine aquaculture, accounting for about 70% of the total national aquatic product output in recent years. At present, shellfish are mainly harvested through three methods: manual harvesting, fishing boat fishing, and mechanical shellfish suction. The traditional manual harvesting method is time-consuming and laborious. The harvesters directly screen the shellfish, throwing away or putting back into the water for continued cultivation the damaged, immature, and empty-shelled shellfish. This operation method requires a large amount of manual participation, with high labor intensity, low production efficiency, poor working conditions, and being greatly affected by the ebb and flow of the sea; Fishing boat fishing is to tow the shellfish in the sediment by trawling. This method has relatively high requirements for the water area environment, requiring conditions such as a flat bottom without obstacles, small wind waves and tides, and the fishing net is a flexible object, which is very easy to deform, ultimately affecting the harvesting of shellfish; The mechanical shellfish suction method will suck up shellfish of all sizes without discrimination, which is not conducive to the continuity of marine organisms. At the same time, the harvested shellfish will carry a large amount of sediment and impurities, and need to be secondarily screened and filtered on the boat, and the breakage rate of shellfish is also high.

[0004] In recent years, with the lightweight, intelligent, and environmentally friendly development of China's heavy industry, it has also provided various feasible paths for the underwater operation methods in the fishing industry, making the underwater operation machinery continuously move towards the direction of intelligent fishing. Therefore, it is imperative to develop a shellfish harvesting machine with high automation and little damage to the geographical environment and ecological continuity. Summary of the Invention

[0005] In view of the deficiencies of the prior art, the present invention provides a selectable and self-filtering underwater shellfish harvester. The underwater shellfish harvester is not affected by tides and shellfish varieties, achieves the effect of separating mud from shellfish while harvesting shellfish, integrates multiple functions of harvesting, filtering, screening, and cleaning, and has high mechanical operation efficiency.

[0006] To achieve the above-mentioned invention purpose, the present invention is implemented by adopting the following technical solutions:

[0007] The present invention provides a selectable and self-filtering underwater shellfish harvester, including:

[0008] Generator; water pump device for water supply;

[0009] Characterized in that it further includes a shellfish harvesting device, connected to the water pump device, which includes:

[0010] Shellfish warning mechanism, used to stimulate the shellfish in the mud to close their mouths, thereby reducing the breakage rate during shellfish harvesting;

[0011] Shellfish lifting mechanism, connected to the shellfish warning mechanism, which includes: a shellfish lifting bin, the bottom surface of which is provided with an unobstructed shovel plate for collecting the mud-shellfish mixture;

[0012] Shellfish lifter, fixedly installed in the shellfish lifting bin, one side of which is provided with a high-pressure water inlet connected to the water pump device, and the other side is provided with a shellfish lifting nozzle for spraying up the mud-shellfish mixture and a shellfish conveying nozzle for conveying the mud-shellfish mixture;

[0013] Replaceable mud filtering mechanism, connected to the shellfish lifting bin, and grid nets for filtering sediment and shellfish smaller than the harvesting specification are provided on its perimeter and bottom surface;

[0014] Shellfish collecting bin, connected to the replaceable mud filtering mechanism on one side, and provided with a drainage part for conveying the shellfish to the shellfish cleaning device on the other side;

[0015] Shellfish cleaning device, connected to the shellfish harvesting device, which includes:

[0016] Spiral cleaning bin, the inside of which is provided with centrifugal blades for shellfish cleaning and adjustable side plates that are in clearance fit with the centrifugal blades;

[0017] Shellfish feeding port, arranged on one side of the spiral cleaning bin, connected to the drainage part, which includes a shellfish inlet cavity and a water inlet cavity, and is provided with a pressure gauge for detecting water pressure thereon;

[0018] Water replenishing mechanism, installed on the shellfish feeding port, including: a water replenishing port connected between the upper part of the water inlet cavity and the water pump device, and a impurity removing and sewage discharging port arranged at the lower part of the water inlet cavity;

[0019] Transmission mechanism, arranged on the other side of the spiral cleaning bin, including: a power output wheel, which is connected to the centrifugal blades through a coupling and is also connected to the generator through a transmission belt for power transmission;

[0020] Shellfish discharge port, connected to the spiral cleaning bin, for conveying the cleaned shellfish.

[0021] Further, the shellfish warning mechanism is of steel frame structure, including: a warning bin and a rubber buffer belt installed at the end of the warning bin; the warning bin is provided with a bottom plate except for the bottom surface, and openings are provided on other surfaces for giving the shellfish that close their mouths under stimulation a stress buffer time to completely close their mouths; the rubber buffer belt is a convex rubber belt for stimulating the shellfish to close their mouths.

[0022] Further, one side of the shellfish lifting bin is connected to the warning bin, and a grooved baffle matching the high-pressure water inlet of the shellfish lifter is provided on this side, the opposite side is connected to the replaceable mud filtering mechanism, and baffles and positioning grooves connected to the baffles are provided on its two vertical sides; positioning shoulders are provided at both ends of the shellfish lifter, and it is fixedly connected to the positioning grooves through the positioning shoulders.

[0023] Further, the shellfish lifting nozzles and the shellfish conveying nozzles are arranged at equal distances; the number of the shellfish lifting nozzles is 3 to 10; the number of the shellfish conveying nozzles is 40 - 100.

[0024] Further, the inner diameter of the shellfish lifting nozzle is 10 mm to 20 mm, and the opening direction of its nozzle faces the unobstructed shovel plate of the shellfish lifting bin; the inner diameter of the shellfish conveying nozzle is 2 mm to 8 mm, and the opening direction of its nozzle faces the replaceable mud filtering mechanism.

[0025] Further, the shellfish feeding port is of double-layer structure, its internal space is a shellfish inlet cavity, which is connected to the drainage part through a shellfish conveying pipe for conveying shellfish into the spiral cleaning bin; its external space is a water inlet cavity for cooperating with the water replenishing mechanism to supplement pressure water to the spiral cleaning bin.

[0026] Further, the adjustable side plate is installed on the inner side surface of the spiral cleaning bin and is connected to a sealing fine-tuning bolt arranged on the spiral cleaning bin for adjusting the adjustable side plate; the number of the sealing fine-tuning bolts is 4 to 10.

[0027] Further, the water pump device includes two water pumps; the water outlet of the first water pump is connected to the high-pressure water inlet through a high-pressure water conveying pipe for providing high-pressure water for the shellfish lifter; the water outlet of the second water pump is connected to the water replenishing port through a water replenishing conveying pipe for providing pressure water for the spiral cleaning bin; the water inlets of the water pump device are all communicated with seawater.

[0028] Further, the generator, the shellfish cleaning device and the water pump device are all fixed on the hull, and the shellfish harvesting device is fixed at the lower part of the hull and travels synchronously with the hull.

[0029] The present invention also provides a method for harvesting shellfish by the self-filtering underwater shellfish harvester as described above, including the following steps:

[0030] (1)Provide power: Turn on the generator to provide power for the self-filtering underwater shellfish harvester.

[0031] (2)Supplement pressurized water: Turn on the water pump device, adjust the passing water pressure of the shell lifter, and supplement pressurized water for the shell lifter and the spiral cleaning bin.

[0032] (3)Collect shellfish: The shellfish warning mechanism stimulates the shellfish to close their shells; the unobstructed shovel plate of the shell lifting bin shovels up the mud and shellfish mixture and enters the shell lifting bin; the shell lifting nozzle sprays up the mud and shellfish mixture, and the shell conveying nozzle conveys the sprayed mud and shellfish mixture to the replaceable mud filtering mechanism for filtering, and under the power of the generator, the filtered shellfish are conveyed to the shell collecting bin.

[0033] (4)Clean and collect shellfish: Convey the shellfish in the shell collecting bin to the shell inlet cavity of the shell feeding port through the shell conveying pipe; under the action of the water pump device, pressurized water is being supplemented in the water inlet cavity; then the pressurized water and the shellfish enter the spiral cleaning bin for cleaning synchronously, and the cleaned shellfish are output from the shell outlet, and the clean shellfish are collected and packaged.

[0034] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0035] The screenable self-filtering underwater shellfish harvester of the present invention can separate mud and shellfish by relying on the underwater shellfish harvesting device, and return the shellfish seedlings to their original positions; its spiral cleaning bin can further remove impurities such as sediment while collecting shellfish; its spiral cleaning bin and the underwater shellfish harvesting device are closely coordinated, greatly improving the speed of harvesting shellfish, and the sediment content and breakage rate are also lower. The device of the present invention can not only be applicable to shellfish harvesting in ponds and tidal flats, but also catch shellfish at a depth of about 10 meters in shallow sea waters. And compared with the current mainstream fishing operation methods, the advantages of this screenable self-filtering underwater shellfish harvester are as follows:

[0036] (1)Wide application range, capable of working in various waters such as ponds, tidal flats, and shallow sea water areas, with strong adaptability.

[0037] (2)Extremely high production efficiency. The "S"-shaped single-blade structure can generate strong thrust at a relatively low rotational speed, greatly improving the efficiency of harvesting shellfish and reducing the work intensity of the harvesters. And for different waters, the efficiency of harvesting shellfish can be changed by adjusting the turbine rotational speed, with good economic benefits.

[0038] (3)Good structural optimization. By adjusting the equipment structure of the shellfish harvester, the shellfish seedlings can be left in their original growth environment, and only the mature shellfish are caught, which is beneficial to the continuity of the development of marine organisms.

[0039] (4) High yield rate. The shellfish harvested by the self-filtering underwater shellfish harvester with screening function have much less sediment compared with those harvested by the same type of shellfish harvester, and basically do not need secondary filtration and cleaning and can be directly packaged. At the same time, the breakage rate of the harvested shellfish is also relatively low.

[0040] (5) Little impact on the environment. Different from the large-scale damage to the geographical environment by methods such as drag shovel shellfish harvesters, the present invention has little damage to the original natural environment and high feasibility. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 It is a front perspective view of the self-filtering underwater shellfish harvester.

[0042] Figure 2 It is a rear perspective view of the self-filtering underwater shellfish harvester.

[0043] Figure 3 It is a three-dimensional structure diagram of the shellfish harvesting device.

[0044] Figure 4 It is a three-dimensional structure diagram of the shell lifting device.

[0045] Figure 5 It is a three-dimensional structure diagram of the spiral cleaning bin.

[0046] In the figure: 1 hull, 2 generator, 3 water pump device, 4 high-pressure water delivery pipe, 5 rubber buffer belt, 6 warning bin, 7 shell lifting device, 8 shell lifting bin, 9 replaceable mud filtering mechanism, 10 shell collecting bin, 11 shellfish conveying pipe, 12 water replenishing mechanism, 13 spiral cleaning bin, 14 water replenishing delivery pipe, 15 power input wheel, 16 transmission belt, 17 power output wheel, 18 positioning lock, 19 positioning pin, 20 bolt gasket set, 21 shellfish delivery nozzle, 22 shell lifting nozzle, 23 positioning shoulder, 24 high-pressure water inlet, 25 sealing fine-tuning bolt, 26 pressure gauge, 27 shellfish feeding port, 28 water replenishing port, 29 impurity removing and sewage discharging port, 30 coupling, 31 shellfish discharging port. DETAILED DESCRIPTION OF THE INVENTION

[0047] The technical solutions of the present invention will be further described in detail in combination with the following specific examples. In the present invention, for the convenience of better describing the self-filtering underwater shellfish harvester with screening function, the Figure 1 shown direction is set as the "front direction" of the underwater shellfish harvester, that is, the forward direction, and the Figure 2The direction shown is set as the "backward" direction of the underwater shellfish harvester. It should be noted that in the description of the present invention, the terms indicating the direction or positional relationship such as "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. are based on the direction or positional relationship shown in the drawings. This is only for convenience of description and does not indicate or imply that the device or component must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0048] Embodiment 1

[0049] The present invention provides a screenable autonomous filtering underwater shellfish harvester, as Figures 1 - 5 shown, including:

[0050] A shellfish harvesting device, fixed to the lower part of the hull 1, moving synchronously with the hull 1, so that it can directly carry out the screening work of shellfish underwater or in shallow waters, etc.

[0051] A shellfish cleaning device, fixed on the floating hull 1, connected to the shellfish harvesting device through a shellfish conveying pipe 11, and used for cleaning the shellfish collected by the shellfish harvesting device.

[0052] A water pump device 3, fixed on the floating hull 1, respectively connected to the shellfish cleaning device and the shellfish harvesting device through a conveying pipe, and used for supplying water to the above two devices.

[0053] A generator 2, fixed on the floating hull 1, connected to the shellfish cleaning device through a transmission belt 16, and used for providing power for the autonomous filtering underwater shellfish harvester.

[0054] Specifically, the shellfish harvesting device includes a shellfish warning mechanism, a shellfish lifting mechanism, a replaceable mud filtering mechanism 9 and a shellfish collection bin 10.

[0055] The shellfish warning mechanism, in order to have a strong bearing capacity, the overall structure is selected as a steel frame structure, which specifically includes: a rubber buffer belt 5 and a warning bin 6.

[0056] The warning bin 6 has openings on five of its surfaces except for the bottom surface which is provided with a bottom plate. Its tail end (right side) is an arc surface tangent to the ground, and the rubber buffer belt 5 is installed on this arc surface. The rubber buffer belt 5 is selected as a relatively soft convex rubber belt, which is used to overcome the unevenness of the seabed during forward movement, so that the warning bin 6 can break through smoothly when encountering an obstacle, and generate a certain vibration effect, stimulating the shellfish inside and outside the shellfish harvesting device to close their mouths, thereby preventing damage to the shellfish during the harvesting process and reducing the shellfish breakage rate.

[0057] When the shellfish harvesting device collects shellfish, the relatively soft protruding rubber belt on the rubber buffer belt 5 generates a certain vibration, which will stimulate the shellfish with open mouths in the bottom mud, causing the shellfish to close their mouths instantly when they feel the vibration. At this time, the hull and the shellfish harvester continue to operate. The warning bin 6 passes above the shellfish, giving the incompletely closed shellfish a certain stress buffer time to completely close their mouths, thereby reducing the breakage rate during shellfish harvesting.

[0058] The shellfish lifting mechanism is connected to the warning bin 6 and includes a shellfish lifter 7 and a shellfish lifting bin 8.

[0059] The shellfish lifting bin 8 has its right side (tail end) connected to the left side (head end) of the warning bin 6, and a slotted baffle is provided. The slot on the slotted baffle cooperates with the high-pressure water inlet 24 of the shellfish lifter 7 to fix the shellfish lifter 7. Its left side (head end) is connected to the replaceable mud filtering mechanism 9. A baffle and a positioning groove connected to the baffle are provided on the front and back of the shellfish lifting bin 8 respectively. The positioning groove cooperates with the positioning shoulder 23 on the shellfish lifter 7 to fix the shellfish lifter 7. The bottom surface of the shellfish lifting bin 8 is provided with an unobstructed shovel plate for collecting the mud-shellfish mixture in the water or on the shoal.

[0060] The shellfish lifter 7 is fixed inside the shellfish lifting bin 8 and is a cylindrical hollow tube that can conduct water. Its water pressure can be adjusted according to the needs of different shellfish. The two ends of the shellfish lifter 7 are provided with positioning shoulders 23, and it is fixedly connected to the positioning groove of the shellfish lifting bin 8 through the positioning shoulders 23 and the bolt gasket group 20.

[0061] A total of 4 shellfish lifting nozzles 22 are provided, which are installed side by side at equal distances under the shellfish lifter 7. The nozzle opening direction faces the unobstructed shovel plate of the shellfish lifting bin 8 and is used to spray up the mud-shellfish mixture in the shellfish lifting bin 8.

[0062] A total of 69 shellfish conveying nozzles 21 are provided, which are installed side by side at equal distances on the side of the shellfish lifter 7. The nozzle opening direction faces the replaceable mud filtering mechanism 9 and is used to convey the shellfish containing a small amount of sediment sprayed up by the shellfish lifting nozzles 22 to the replaceable mud filtering mechanism 9.

[0063] The inner diameter of the shellfish lifting nozzle 22 is about 15 mm; the inner diameter of the shellfish conveying nozzle 21 is about 5 mm; the shellfish lifting nozzle 22 and the shellfish conveying nozzle 21 form a certain angle, and this angle can be adjusted according to the actual operation situation, as long as it meets the requirement that the shellfish lifting nozzle 22 sprays up the mud-shellfish mixture and the shellfish conveying nozzle 21 conveys the sprayed shellfish to the replaceable mud filtering mechanism 9. The number of the shellfish lifting nozzles 22 and the shellfish conveying nozzles 21 can also be adjusted according to the actual situation.

[0064] The high-pressure water inlet 24 is set at the middle position of the shellfish lifter 7, opposite to the shellfish conveying nozzle 21. It is a high-density plastic pipe and can also be replaced by other available pipes for conveying high-pressure water into the shellfish lifter 7.

[0065] The replaceable filter mud mechanism 9 has a trapezoidal longitudinal section with a right angle on the right side. Grille nets with equal spacing are provided on its four front, back, upper and lower surfaces for screening shellfish of different specifications and filtering the sediment of shellfish. It can harvest large-volume shellfish while filtering small-volume shellfish and sediment back into the water or the shallows. The mesh size of the grille net can be adjusted and replaced according to the shellfish harvesting requirements. The replaceable filter mud mechanism 9 is connected to the shell lifting bin 8 and the shell collecting bin 10 through positioning pins 19 and positioning latches 18.

[0066] Specifically, there are 4 positioning pins 19 in total, all of which are vertical pins. They are arranged at the four corners of the front and back surfaces of the replaceable filter mud mechanism 9 for fixedly connecting the replaceable filter mud mechanism 9 with the shell collecting bin 10 and the shell lifting bin 8.

[0067] There are 5 positioning latches 18 in total, all of which are arranged on the upper surface of the replaceable filter mud mechanism 9. Among them, 3 positioning latches 18 are arranged on its upper right for connecting the shell lifting bin 8; the other two positioning latches 18 are arranged on the upper left for connecting the shell collecting bin 10.

[0068] The shell collecting bin 10 is connected to the replaceable filter mud mechanism 9 on its right side (tail end), and a drainage part is provided on its left side (head). The drainage part is a tubular structure with an arc shape for conveying the collected shellfish to the shellfish cleaning device. The drainage part of the shell collecting bin 10 is connected to the shellfish feeding port 27 of the shellfish cleaning device through a shellfish conveying pipe 11. The shellfish conveying pipe 11 is a high-density plastic hose, and other available hoses can also be replaced as long as they can play the role of conveying shellfish.

[0069] The shellfish cleaning device is connected to the shellfish harvesting device and includes a spiral cleaning bin 13, a water replenishing mechanism 12 and a transmission mechanism.

[0070] The spiral cleaning bin 13 is shaped like a snail and includes centrifugal blades and adjustable side plates. It can increase the pressure while ensuring the stable water pressure in the cavity and convey and clean the shellfish through the cooperation with the centrifugal blades.

[0071] The centrifugal blades are arranged inside the spiral cleaning bin 13 and are single blades shaped like an "S". They maintain a certain clearance fit with the adjustable side plates, so that the centrifugal blades can provide a large thrust at a relatively slow rotation speed for cleaning the shellfish.

[0072] The adjustable side plates are arranged in the front inside the spiral cleaning bin 13 and can be adjusted empirically according to the size of the shellfish to prevent the shellfish from being damaged during the cleaning process. There are 6 sealing and fine-tuning bolts 25 in total on the spiral cleaning bin 13 around the shellfish feeding port 27, which are connected to the adjustable side plates inside the spiral cleaning bin 13 for fine-tuning the position of the adjustable side plates.

[0073] The shellfish feed inlet 27 is set at the central position in front of the spiral cleaning bin 13. The shellfish feed inlet 27 has a double-layer structure. The inner space (shellfish inlet chamber) is connected to the drainage part of the shellfish collection bin 10 through the shellfish conveying pipe 11, and cooperates with the shellfish harvesting device to convey shellfish into the spiral cleaning bin 13 for cleaning; the outer space (water inlet chamber) cooperates with the water replenishing mechanism 12 to replenish pressurized water to the spiral cleaning bin 13 for shellfish cleaning; the size of the water inlet chamber can be adjusted according to the water pressure. Two pressure gauges 26 are provided on the shellfish feed inlet 27, both of which are vacuum pressure gauges; the first pressure gauge is installed on the front side of the shellfish feed inlet 27 for detecting the water pressure of the shellfish feed inlet 27; the second pressure gauge is installed on the rear side of the shellfish feed inlet 27 for detecting the water pressure after water replenishment.

[0074] The water replenishing mechanism 12 is installed on the shellfish feed inlet 27 and includes a water replenishing port 28 and a impurity removing and sewage draining port 29.

[0075] The lower end of the water replenishing port 28 is connected to the water inlet chamber of the shellfish feed inlet 27, and the upper end is connected to the water pump device 3 through the water replenishing conveying pipe 14 for replenishing pressurized water for cleaning shellfish to the spiral cleaning bin 13.

[0076] The impurity removing and sewage draining port 29 has its upper end connected to the water inlet chamber of the shellfish feed inlet 27 and its lower end communicating with the outside air for impurity removal and sewage draining.

[0077] The transmission mechanism is set behind the spiral cleaning bin 13 and includes a coupling 30 and a power output wheel 17.

[0078] The central axis of the power output wheel 17 is connected to the centrifugal blades in the spiral cleaning bin 13 through the coupling 30. By rotating the power output wheel 17, the torque is transmitted to the coupling 30, and then the centrifugal blades are driven to rotate, realizing the process of conveying shellfish onto the ship. The outside of the power output wheel 17 is connected to the power input wheel 15 of the generator 2 through the transmission belt 16 to realize power transmission.

[0079] The shellfish discharge port 31 is set at the left end of the spiral cleaning bin 13 for conveying the cleaned shellfish onto the ship.

[0080] The water pump device 3 includes two water pumps, the first water pump and the second water pump. The water outlet of the first water pump is connected to the high-pressure water inlet 24 through the high-pressure water conveying pipe 4 for providing high-pressure water for the shell lifting device 7; the water outlet of the second water pump is connected to the water replenishing port 28 through the water replenishing conveying pipe 14 for providing pressurized water for the water replenishing mechanism 12 and the spiral cleaning bin 13; the water inlets of both water pumps communicate with seawater.

[0081] Embodiment 2

[0082] A shellfish harvesting method using the selectable self-filtering underwater shellfish harvester in Embodiment 1 includes the following steps:

[0083] (1) Provide power: Turn on the generator 2 to drive the power input wheel 15 and the power output wheel 17 to work, and then drive the centrifugal blades in the spiral cleaning bin 13 through the coupling 30 to provide power for the spiral cleaning bin 13;

[0084] (2) Supplement pressure water: Turn on the water pump device 3, adjust the water pressure passing through the oyster opener 7, use the first water pump to supplement high-pressure water for the oyster opener 7, use the second water pump to supplement pressure water for the spiral cleaning bin 13, and drive the oyster opener 7 and the water replenishing mechanism 12 to operate;

[0085] (3) Collect shellfish: The hull 1 starts to move forward, and the rubber buffer belt 5 generates a certain vibration, which will stimulate the shellfish with open mouths in the bottom mud. The shellfish are stimulated to close their mouths. The hull 1 continues to move forward. The warning bin 6 passes above the shellfish, giving the shellfish that have not completely closed their mouths a certain stress buffer time to completely close their mouths; Under the power supply of the generator 2, a certain suction force will be generated in the shellfish collection bin 10 and the oyster collection bin 8. The oyster collection bin 8 uses the unobstructed shovel plate to shovel up the mud-shellfish mixture and collect it into the oyster collection bin 8; The oyster nozzle 22 sprays up the mud-shellfish mixture, and the shellfish conveying nozzle 21 uses the high-pressure water jet force to transport the sprayed shellfish to the replaceable mud filtering mechanism 9; After the replaceable mud filtering mechanism 9 filters the sediment and the smaller-sized shellfish, with the power provided by the generator 2 for the shellfish cleaning device, the shellfish are transported to the shellfish collection bin 10;

[0086] (4) Clean and collect shellfish: The shellfish in the shellfish collection bin 10 are transported to the shellfish inlet cavity of the shellfish feed port 27 through the shellfish conveying pipe 11. At this time, under the action of the second water pump, the water replenishing port 28 is continuously supplementing pressure water into the water inlet cavity; Then the water and the shellfish enter the spiral cleaning bin 13 synchronously. Under the rotation of the centrifugal blades, the shellfish are cleaned, and the cleaned shellfish are output from the shellfish discharge port 31, and the clean shellfish can be collected and bagged.

[0087] The self-filtering underwater shellfish harvester with screening function of the present invention, through the mutual cooperation of the shellfish harvesting device and the shellfish cleaning device, enables the underwater shellfish harvester to directly screen the shells underwater or in shallow waters. Compared with screening on the water surface, it can not only reduce the buoyancy required for floating, but also greatly facilitate the use of personnel and reduce labor.

[0088] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; Although the present invention has been described in detail with reference to the foregoing embodiments, for those of ordinary skill in the art, it is still possible to modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features; And these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions required to be protected by the present invention.

Claims

1. A sieveable autonomous filtering underwater shellfish harvester, comprising: A generator; A water pump device for supplying water; Characterized in that it further comprises a shellfish harvesting device, connected to the water pump device, which includes: A shellfish warning mechanism for stimulating shellfish in the mud to close their mouths, thereby reducing the breakage rate during shellfish harvesting; The shellfish warning mechanism is of a steel frame structure, including: a warning bin and a rubber buffer belt installed at the end of the warning bin; the warning bin is provided with a bottom plate except for the bottom surface, and openings are provided on other surfaces to give the shellfish that are stimulated to close their mouths a stress buffer time to completely close their mouths; the rubber buffer belt is a convex rubber belt for stimulating shellfish to close their mouths; A shellfish lifting mechanism, connected to the shellfish warning mechanism, which includes: a shellfish lifting bin, the bottom surface of which is provided with an unobstructed shovel plate for collecting the mud-shellfish mixture; A shellfish lifter, fixedly installed in the shellfish lifting bin, with a high-pressure water inlet connected to the water pump device on one side, a shellfish lifting nozzle for spraying up the mud-shellfish mixture and a shellfish conveying nozzle for conveying the mud-shellfish mixture on the other side; A replaceable mud filtering mechanism, connected to the shellfish lifting bin, with grid nets for filtering sediment and shellfish smaller than the harvesting specification provided on its four sides and bottom surface; the longitudinal section of the replaceable mud filtering mechanism is a trapezoid with a right angle on the right side, and grid nets with equal spacing are provided on its front, back, upper and lower four surfaces, and the mesh size of the grid nets can be adjusted and replaced according to the shellfish harvesting requirements; the replaceable mud filtering mechanism is connected to the shellfish lifting bin and the shellfish collecting bin through positioning pins and positioning latches; A shellfish collecting bin, connected to the replaceable mud filtering mechanism on one side, and provided with a drainage part for conveying shellfish to the shellfish cleaning device on the other side; A shellfish cleaning device, connected to the shellfish harvesting device, which includes: A spiral cleaning bin, inside which there are centrifugal blades for shellfish cleaning and adjustable side plates that are in clearance fit with the centrifugal blades; The adjustable side plates are installed on the inner side surface of the spiral cleaning bin and are connected to the sealing fine-tuning bolts provided on the spiral cleaning bin for adjusting the adjustable side plates; the number of the sealing fine-tuning bolts is 4 to 10; A shellfish feeding port, provided on one side of the spiral cleaning bin and connected to the drainage part, which includes a shellfish inlet cavity and a water inlet cavity, and is provided with a pressure gauge for detecting water pressure thereon; A water replenishing mechanism, installed on the shellfish feeding port, including: a water replenishing port connected between the upper part of the water inlet cavity and the water pump device, and a impurity removing and sewage draining port provided at the lower part of the water inlet cavity; A transmission mechanism, provided on the other side of the spiral cleaning bin, including: a power output wheel, which is connected to the centrifugal blades through a coupling and is also connected to the generator through a transmission belt for power transmission; A shellfish discharge port, connected to the spiral cleaning bin, for conveying the cleaned shellfish.

2. The self-filtering underwater shellfish harvester according to claim 1, wherein, One side of the shellfish lifting bin is connected to the warning bin, and a grooved baffle matching the high-pressure water inlet of the shellfish lifter is provided on this side, the opposite side is connected to the replaceable mud filtering mechanism, and baffles and positioning grooves connected to the baffles are provided on its two vertical sides; positioning shoulders are provided at both ends of the shellfish lifter, and it is fixedly connected to the positioning grooves through the positioning shoulders.

3. The self-filtering underwater shellfish harvester according to claim 1, wherein The shell-lifting nozzles and the shell-conveying nozzles are arranged at equal distances; the number of the shell-lifting nozzles is 3 to 10; the number of the shell-conveying nozzles is 40 to 100.

4. The self-filtering underwater shellfish harvester according to claim 3, wherein, The inner diameter of the shell-lifting nozzles is 10 mm to 20 mm, and the nozzle opening direction faces the unobstructed spade plate of the shell-lifting bin; the inner diameter of the shell-conveying nozzles is 2 mm to 8 mm, and the nozzle opening direction faces the replaceable mud-filtering mechanism.

5. The self-filtering underwater shellfish harvester according to claim 1, wherein The shell feeding port has a double-layer structure. Its internal space is a shell inlet cavity, which is connected to the diversion part through a shell conveying pipe and is used for conveying shells into the spiral cleaning bin; its external space is a water inlet cavity, which is used to cooperate with the water replenishing mechanism to replenish pressurized water into the spiral cleaning bin.

6. The self-filtering underwater shellfish harvester according to claim 1, wherein The water pump device includes two water pumps; the water outlet of the first water pump is connected to the high-pressure water inlet through a high-pressure water conveying pipe and is used to provide high-pressure water for the shell-lifter; the water outlet of the second water pump is connected to the water replenishing port through a water replenishing conveying pipe and is used to provide pressurized water for the spiral cleaning bin; the water inlets of the water pump device are all communicated with seawater.

7. The self-filtering underwater shellfish harvester according to claim 1, characterized in that, The generator, the shell cleaning device and the water pump device are all fixed on the hull, and the shell harvesting device is fixed at the lower part of the hull and travels synchronously with the hull.

8. A method for harvesting shellfish using the self-filtering underwater shellfish harvester according to any one of claims 1-6, characterized in that, It includes the following steps: (1) Provide power: Turn on the generator to provide power for the self-filtering underwater shell harvester. (2) Supplement pressurized water: Turn on the water pump device and adjust the passing water pressure of the shell-lifter to supplement pressurized water for the shell-lifter and the spiral cleaning bin. (3) Collect shells: The shell warning mechanism stimulates the shells to close their mouths; the unobstructed spade plate of the shell-lifting bin shovels up the mud-shell mixture and enters the shell-lifting bin; the shell-lifting nozzles spray up the mud-shell mixture, and the shell-conveying nozzles convey the sprayed mud-shell mixture to the replaceable mud-filtering mechanism for filtering, and under the power of the generator, the filtered shells are conveyed to the shell collection bin. (4) Clean and collect shells: Convey the shells in the shell collection bin to the shell inlet cavity of the shell feeding port through a shell conveying pipe; under the action of the water pump device, pressurized water is being replenished in the water inlet cavity; then the pressurized water and the shells enter the spiral cleaning bin for cleaning synchronously, and the cleaned shells are output from the shell outlet, and the clean shells are collected and packaged.

Images