A seafood harvesting boat

Abstract

The present invention relates to the field of ship technology, and specifically to a seafood harvesting ship, comprising a daughter ship, wherein a rope cutting device and a receiving device are suspended on the daughter ship, wherein the rope cutting device is provided with two cutting knife assemblies for cutting the two ends of a culture rope respectively, and the two sets of cutting knife assemblies are arranged on the left and right sides of the daughter ship respectively, and the receiving device is used to receive the culture rope and the seafood connected to the culture rope that are cut and dropped by the rope cutting device, and the receiving device is detachably connected to the daughter ship; and further comprising a lifting device, wherein the lifting device is used to lift the receiving device out of the water surface so as to facilitate the transfer of the culture rope and the seafood in the receiving device. When the daughter ship travels to a preset water area, the two cutting knife assemblies cut the two ends of the culture rope, and the receiving device receives the cut culture rope and the seafood, and the daughter ship travels under the lifting device again, and the lifting device lifts the receiving device from underwater so as to unload the seafood, thereby realizing underwater mechanized harvesting, improving harvesting efficiency and reducing the phenomenon of seafood falling due to the culture rope being pulled out of the water surface.

Description

Technical Field

[0001] The present invention relates to the technical field of ships, and in particular to a marine product harvesting ship. Background Art

[0002] There are many kinds of seafood, and there are also many ways to cultivate them artificially. Harvesting ships are usually used to harvest seafood after it matures. With the development of technology, the harvesting of seafood has a tendency to be mechanized. Horizontal rope cultivation is a way of artificially cultivating seafood. It is widely used in the artificial cultivation of shellfish seafood such as oysters and scallops, as well as algae seafood such as kelp and laver. When harvesting, the seedling rope (i.e., cultivation rope) is generally cut off and then transported to the water (on the ship, on the shore, etc.) to remove the seafood from the cultivation rope. The following uses oysters as an example to explain the cultivation and harvesting methods:

[0003] At sea, horizontal rope oyster farming needs to be carried out on the sea surface with less waves and currents. Figure 1 As shown, it generally includes two main ropes and multiple farming ropes connected to the two main ropes at both ends. The main rope farming length is about 120m, the spacing is about 2m, the main ropes are anchored to the seabed at both ends, and each main rope is suspended by multiple buoys. The distance between the main rope and the sea surface is about 0.3m. The length of the farming rope is about 4m, the diameter is about 3mm, and the spacing between each farming rope is about 35cm. With the expansion of the scale of offshore horizontal rope oyster farming, a marine ranch built with multiple main ropes has a large workload of oyster harvesting and requires the cooperation of multiple people. With the aging of the aquaculture industry practitioners, facing the high-intensity oyster harvesting work, there is an urgent need for mechanized harvesting devices to replace manual work and reduce labor costs. Mechanized seafood harvesting has become a hot topic in the industry.

[0004] Utility model patent CN222224379U discloses a catamaran aquaculture harvesting platform, which is suitable for oyster harvesting and seedling hanging, aquaculture cage cleaning, scallop harvesting and seedling hanging, abalone feeding and harvesting, and seedling hanging. The harvesting platform includes two left and right hulls and a farming lifting mechanism and a rope cutter arranged between the two hulls. The rope cutter is a gantry arranged above the hull, far above the water surface. The aquaculture rope is lifted out of the water and pulled to the position of the rope cutter, and then the aquaculture rope is cut off, and then the cut aquaculture rope is harvested. This harvesting method requires the aquaculture rope to be pulled out of the water. In the process of pulling the aquaculture rope, the seafood hanging on the aquaculture rope is easy to fall into the sea, which is more suitable for seafood cultured in aquaculture cages. For seafood cultured directly on the rope, there is a risk that the seafood is easy to fall into the sea. Therefore, there is currently no reliable harvesting ship for reliably and efficiently harvesting seafood cultured directly on the rope. Summary of the invention

[0005] The object of the present invention is to provide a seafood harvesting boat, which solves the problem that the existing harvesting boats cannot reliably harvest the seafood cultured on the rope by cutting the rope underwater and receiving the culture rope underwater.

[0006] To achieve the above object, the technical solution of the present invention includes:

[0007] A seafood harvesting boat comprises a daughter boat, wherein the daughter boat is suspended with a rope cutting device and a receiving device, wherein the rope cutting device is provided with two cutting knife assemblies for cutting two ends of a culture rope respectively, and two groups of the cutting knife assemblies are arranged on the left and right sides of the daughter boat respectively, and the receiving device is used to receive the culture rope and the seafood connected to the culture rope that are cut and dropped by the rope cutting device, and the receiving device is detachably connected to the daughter boat; and further comprises a lifting device, wherein the lifting device is used to lift the receiving device out of the water surface so as to transfer the culture rope and the seafood in the receiving device; the operation process of harvesting seafood comprises:

[0008] The daughter boat with the rope cutting device and the receiving device suspended thereon travels to the aquaculture area where the marine products are to be harvested, the two cutting knife assemblies of the rope cutting device simultaneously cut the two ends of the aquaculture rope, and the receiving device receives the cut aquaculture rope; as the daughter boat travels along the spaced arrangement direction of the aquaculture ropes, the rope cutting device cuts the aquaculture ropes in sequence, and the cut aquaculture ropes fall into the receiving device in sequence; the daughter boat travels to the area where the lifting device is located, the lifting device is connected to the receiving device, the receiving device and the daughter boat are separated, the daughter boat unloaded from the receiving device travels away from the area where the lifting device is located, the lifting device lifts the receiving device to a preset height above the water surface, so as to prepare for the transfer of the aquaculture ropes and the marine products in the receiving device; after the aquaculture ropes and the marine products in the receiving device are emptied, the lifting device lowers the receiving device to below the water surface, the daughter boat travels to the area where the lifting device is located, and the lifting device installs the receiving device on the daughter boat, so as to prepare for the next harvesting operation.

[0009] In one embodiment, the receiving device includes a pallet assembly, two connecting rods and two groups of hanging assemblies, the pallet assembly and the hanging assembly are respectively connected to the two ends of the connecting rod, and the two connecting rods are respectively connected to the left and right sides of the pallet assembly; the lifting device is installed on a mother ship, and the lifting device includes two pallet lifting mechanisms, each of which is arranged corresponding to one of the hanging assemblies; the daughter ship is connected to a first clamping assembly, and each of the connecting rods of the receiving device is connected to a second clamping assembly, and the first clamping assembly and the second clamping assembly form a detachable clamping relationship; the lifting device lifts and lowers the receiving device by connecting to the hanging assembly, and as the receiving device is lifted or lowered, the first clamping assembly and the second clamping assembly are separated or clamped, so that the receiving device and the daughter ship are separated or connected.

[0010] In one embodiment, the first clamping assembly includes a support arm connected to the hull of the sub-boat and protruding to one side thereof, and two guide plates connected to the support arm, and the two guide plates are used to clamp on both sides of the connecting rod; the second clamping assembly includes a hook member arranged on one side of the connecting rod, and the hook member is provided with an opening, and the hook member is used to be hooked to the support arm through the opening, so that the receiving device is clamped by the two guide plates by means of the connecting rod and the hook member is hooked to the support arm and is suspended on the sub-boat.

[0011] In one embodiment, the mother ship includes a seafood stacking area and a lifting area distributed along the front and rear of the hull. The lifting area is provided with an open stern slot for the docking of the daughter ship. The pallet lifting mechanism is installed on the left and right sides of the stern open slot so that the pallet lifting mechanism can perform lifting operations on the receiving device located at the stern open slot.

[0012] In one embodiment, the tray assembly includes a tray and a baffle surrounding the outside of the tray, the baffles located on the left and right sides of the tray are movable baffles, and the baffles located on the front and rear sides of the tray are fixed baffles. The lower end of the movable baffle is hinged to the tray, and the upper end of the movable baffle is connected to a flexible connector, which extends to the upper end of the connecting rod. The movable baffle is flipped relative to the tray by lifting and lowering the flexible connector, thereby selectively extending the width of the tray in the left and right directions.

[0013] In one embodiment, the receiving device includes a tray assembly and two connecting rods, the two connecting rods are respectively connected to the left and right sides of the tray assembly, and the two cutter assemblies of the rope cutting device are respectively connected to one of the connecting rods; the cutter assembly includes a suspension rod, a first guide plate and a cutter, the first guide plate is connected to the lower end of the suspension rod, the first guide plate is provided with a rope cutting groove, the cutter is located in the rope cutting groove for cutting the breeding rope, and the front end of the first guide plate is provided with a guide portion extending outward.

[0014] In one embodiment, a second guide plate is disposed on the first guide plate, a limiting groove for accommodating the breeding rope is formed between the first guide plate and the second guide plate, and the cutting knife spans the limiting groove.

[0015] In one embodiment, the cutter assembly is connected to the connecting rod through a cross connection assembly, and the cross connection assembly includes a first slide rod sleeve and a second slide rod sleeve that are perpendicular to each other. The first slide rod sleeve has a first slide rod in the sliding sleeve, and the second slide rod sleeve has a second slide rod in the sliding sleeve. The first slide rod sleeve forms a relatively fixed connection relationship with the connecting rod, the second slide rod sleeve is fixedly connected to the first slide rod, and the upper end of the suspension rod of the cutter assembly is fixedly connected to the second slide rod.

[0016] In one embodiment, the daughter boat is driven by a hydrodynamic device, which includes a water pump and a water pipe group. The water pipe group includes a water inlet pipe and multiple water outlet pipes. The water inlet pipe is connected to the water pump and the water inlet of the water inlet pipe is arranged at the bottom of the daughter boat. The water outlet pipes include a front water outlet pipe, a rear water outlet pipe, a left front water outlet pipe, a right front water outlet pipe, a left rear water outlet pipe and a right rear water outlet pipe. The front water outlet pipe and the rear water outlet pipe are respectively connected to two water outlets of a front and rear control valve, the left front water outlet pipe and the right front water outlet pipe are respectively connected to two water outlets of a left and right front control valve, the left rear water outlet pipe and the right rear water outlet pipe are respectively connected to two water outlets of a left and right rear control valve, the water inlets of the front and rear control valves, the left and right front control valves and the left and right rear control valves are all connected to the water outlet of the water pump, and each control valve is a three-way valve, so that the two water outlet pipes connected to the same control valve are closed at the same time or one of them is selectively discharged.

[0017] In one embodiment, the daughter boat is provided with a position indicating rod, which is fixedly connected to the hull of the daughter boat, and both ends of the position indicating rod correspond to the cutter assembly to facilitate observation of the left-right position of the cutter assembly located underwater.

[0018] The beneficial effects of the present invention are:

[0019] 1. The present invention suspends a rope cutting device and a receiving device on a sub-boat, and the sub-boat carries the rope cutting device and the receiving device to the waters where the seafood to be harvested is located, and uses two cutting knife components of the rope cutting device to cut off the two ends of the aquaculture rope to separate it from the main rope, and then uses the receiving device to receive the cut aquaculture rope and the seafood growing on the aquaculture rope, and then drives the sub-boat to the area where the lifting device is located, and uses the lifting device to lift the receiving device from underwater to facilitate unloading of the aquaculture rope and seafood in the receiving device, thereby completing the underwater harvesting of seafood; and then uses the lifting device to sink the receiving device underwater again, and reinstalls the receiving device on the sub-boat to prepare for the next underwater harvesting operation, thereby realizing underwater mechanized harvesting, improving harvesting efficiency and reducing the phenomenon of seafood falling due to the aquaculture rope being pulled out of the water.

[0020] 2. The hanging assembly and the second clamping assembly are both arranged at the upper end of the connecting rod. The lifting device can lift the receiving device and also detach the receiving device from or install it on the daughter boat by applying force on the hanging assembly. The seafood on the receiving device can be transferred from underwater to the surface of the water by utilizing the lifting of the lifting device and the movement of the daughter boat on the water surface, which simplifies the operation process and mechanical structure and facilitates control.

[0021] 3. The two cutter assemblies are respectively arranged corresponding to the two connecting rods, which can ensure that the two cutter assemblies are kept on both sides of the daughter boat hull and facilitate the adjustment of the position of the cutter assemblies.

[0022] 4. The guide portion on the first guide plate can increase the distance between the front ends of the two first guide plates, so as to bring the aquaculture rope floating underwater into the space between the two cutter assemblies as much as possible, thereby improving the reliability of cutting; and the limiting groove formed by the first guide plate and the second guide plate plays a role in limiting the aquaculture rope from the left and right sides, thereby further improving the reliability of cutting.

[0023] 5. The cross connection assembly and the movable baffle can reduce the overall width of the daughter boat, the rope cutting device and the receiving device to prevent the daughter boat from colliding with the rope cutting device and the receiving device when entering the open slot at the stern. The cross connection assembly can also increase the distance between the two cutter assemblies, so that the cutting position of the cutter assembly is closer to the two ends of the farming rope. The movable baffle can increase the width of the tray and play a blocking role, which is convenient for receiving the farming rope and seafood and preventing the received farming rope or seafood from falling under the action of the water flow.

[0024] 6. The daughter boat is driven by a hydrodynamic device, and the water discharge from the corresponding outlet pipe can realize the forward, backward, turning and sideways movement of the daughter boat. The hydrodynamic device relies on a water pump and multiple three-way valves to adjust the water volume and water outlet position. Compared with traditional propellers, it will not hook on ropes such as aquaculture ropes or harvesting nets, and there is no need to set up steering rudders and other devices, so the direction control is simpler.

[0025] 7. The docking method of mother-and-daughter ships is adopted to avoid carrying too many complex control systems on the daughter ships, modularize the entire process of seafood harvesting, and further carry advanced control methods of unmanned boat technology to achieve fully automated harvesting or an operation mode in which harvesting can be carried out by only one person. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 Schematic diagram of oyster farming according to an embodiment of the present invention.

[0027] Figure 2 2 is a structural diagram of a harvesting boat according to an embodiment of the present invention, in which the flexible connecting parts are omitted.

[0028] Figure 3 It is a structural diagram of the connection between the mother ship, the lifting device and the cargo lifting crane mechanism according to an embodiment of the present invention.

[0029] Figure 4 It is a connection structure diagram of a daughter ship, a rope cutting device and a receiving device according to an embodiment of the present invention.

[0030] Figure 5 It is a left view of the daughter boat, the rope cutting device and the receiving device according to an embodiment of the present invention, in which the flexible connecting member is omitted.

[0031] Figure 6 It is a top view of the daughter boat, the rope cutting device and the receiving device according to an embodiment of the present invention.

[0032] Figure 7 The sub-ship of the embodiment of the present invention is a three-dimensional Figure 1 .

[0033] Figure 8 The sub-ship of the embodiment of the present invention is a three-dimensional Figure 2 .

[0034] Fig. 9 It is a structural diagram of the connection between the rope cutting device and the receiving device according to an embodiment of the present invention.

[0035] Fig.10 It is a diagram of the movable baffle of the receiving device in the embodiment of the present invention in the folded state.

[0036] Fig.11 This is a diagram of the movable baffle of the receiving device in an embodiment of the present invention in an open state.

[0037] Fig.12 The cutter assembly of the embodiment of the present invention is a three-dimensional Figure 1 .

[0038] Fig.13 The cutter assembly of the embodiment of the present invention is a three-dimensional Figure 2 .

[0039] Fig.14It is a schematic diagram of a hydrodynamic device of a daughter ship according to an embodiment of the present invention.

[0040] Fig.15 This is a working state diagram of a daughter boat harvesting oysters according to an embodiment of the present invention, in which the flexible connector is omitted.

[0041] Fig.16 This is a diagram of a mother ship in an embodiment of the present invention when lifting a rope cutting device and a receiving device in a low position, in which the flexible connecting member is omitted.

[0042] Fig.17 It is a state diagram of a mother ship in an embodiment of the present invention when lifting a rope cutting device and a receiving device in a high position.

[0043] Wherein: 1 daughter boat, 11 first clamping assembly, 111 support arm, 112 guide plate, 12 hydrodynamic device, 120 water pipe group, 121 water pump, 122 water inlet pipe, 123 water outlet pipe, 1231 front water outlet pipe, 1232 rear water outlet pipe, 1233 left front water outlet pipe, 1234 right front water outlet pipe, 1235 left rear water outlet pipe, 1236 right rear water outlet pipe, 124 front and rear control valves, 125 left and right front control valves, 126 left and right rear control valves, 13 position indicating rod, 14 vertical rod;

[0044] 2 mother ship, 201 seafood storage area, 202 lifting area, 203 stern open slot;

[0045] 3 rope cutting device, 30 cutter assembly, 31 suspension rod, 32 first guide plate, 321 rope cutting groove, 322 guide part, 33 cutter, 34 wire cutting motor, 35 second guide plate, 36 limit groove, 37 cross connection assembly, 371 first slide rod sleeve, 372 second slide rod sleeve, 373 first slide rod, 374 second slide rod;

[0046] 4 receiving device, 41 tray assembly, 411 tray, 412 movable baffle, 413 fixed baffle, 414 flexible connector, 42 connecting rod, 43 hanging assembly, 431 boom clamp, 432 boom locking block, 433 boom hole, 44 second clamp assembly, 441 hook;

[0047] 5 lifting device, 50 pallet lifting mechanism, 51 column, 52 rack, 53 gear, 54 lifting motor, 55 lifting slide block, 56 lifting arm;

[0048] 6 cargo hoisting mechanism, 61 track, 62 crane;

[0049] 100 main ropes, 200 breeding ropes, 300 buoys, 400 oysters. DETAILED DESCRIPTION

[0050] To further illustrate the various embodiments, the present invention provides drawings. These drawings are part of the disclosure of the present invention, which are mainly used to illustrate the embodiments and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, a person of ordinary skill in the art should be able to understand other possible implementations and advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0051] The present invention discloses a seafood harvesting boat. The harvested seafood refers to the seafood cultured by horizontal ropes, which can be shellfish seafood such as oysters and scallops or algae seafood such as kelp and laver. The seafood in this embodiment is oysters. The culture conditions of this embodiment refer to Figure 1 As shown, it includes two main ropes 100 and multiple culture ropes 200 with two ends connecting the two main ropes 100. The main ropes 100 are about 120m long and about 2m apart. Both ends of the main ropes 100 are anchored on the seabed. Each main rope 100 is suspended by multiple buoys 300. The main rope 100 is about 0.3m away from the sea surface. The culture ropes 200 are about 4m long and about 3mm in diameter. The spacing between each culture rope 200 is about 35cm. Multiple oysters 400 are grown on the culture ropes 200 at intervals.

[0052] See also Figures 1 to 7 As shown, the seafood harvesting ship includes a daughter ship 1 and a mother ship 2. The bow of the daughter ship 1 is defined as the front, the stern is defined as the rear, the width direction of the hull of the daughter ship 1 is the left-right direction, and the direction between the above-water part and the underwater part of the daughter ship 1 is the up-down direction.

[0053] The daughter boat 1 is suspended with a rope cutting device 3 and a receiving device 4. The rope cutting device 3 is provided with two cutting knife assemblies 30 for cutting the two ends of the culture rope 200 respectively. The two sets of cutting knife assemblies 30 are arranged on the left and right sides of the daughter boat 1 respectively. The receiving device 4 is used to receive the culture rope 200 cut by the rope cutting device 3 and the oysters 400 connected to the culture rope 200. The receiving device 4 is detachably connected to the daughter boat 1. The receiving device 4 includes a tray assembly 41, two connecting rods 42 and two sets of hanging assemblies 43. The tray assembly 41 and the hanging assembly 43 are respectively connected to the two ends of the connecting rod 42, and the two connecting rods 42 are respectively connected to the left and right sides of the tray assembly 41. A first clamping assembly 11 is respectively provided on the left and right sides of the hull of the daughter boat 1. Each connecting rod 42 of the receiving device 4 is respectively connected to a second clamping assembly 44. The first clamping assembly 11 and the second clamping assembly 44 form a detachable clamping relationship.

[0054] The mother ship 2 includes a seafood stacking area 201 and a lifting area 202 distributed along the front and rear of the hull. The lifting area 202 is provided with a stern open slot 203 for the daughter ship 1 to dock. A tray lifting mechanism 50 is installed on the left and right sides of the stern open slot 203 respectively. The two tray lifting mechanisms 50 cooperate to form a lifting device 5. The lifting device 5 is used to remove the receiving device 4 from the daughter ship 1 and lift it out of the water to facilitate the transfer of the culture rope 200 and oysters 400 in the receiving device 4. Each tray lifting mechanism 50 corresponds to a hanging assembly 43. The tray lifting mechanism 50 of the lifting device 5 lifts and lowers the receiving device 4 by connecting to the hanging assembly 43. As the receiving device 4 is lifted or lowered, the first clamping assembly 11 and the second clamping assembly 44 are separated or clamped, so that the receiving device 4 and the daughter ship 1 are separated or connected. The pallet lifting mechanism 50 is disposed on the left and right sides of the stern open slot 203 so that the pallet lifting mechanism 50 can perform hoisting operations on the receiving device 4 located at the stern open slot 203 .

[0055] The operation process of harvesting oysters 400 in this embodiment includes:

[0056] The daughter boat 1 with the rope cutting device 3 and the receiving device 4 suspended thereon travels to the culture area where the oysters are to be harvested, and the two cutting blade assemblies 30 of the rope cutting device 3 simultaneously cut the two ends of the culture rope 200, and the receiving device 4 receives the cut culture rope 200 and the oysters 400 growing on the culture rope 200. As the daughter boat 1 travels along the spaced arrangement direction of the culture ropes 200 (i.e. the extension direction of the main rope 100), the rope cutting device 3 cuts the culture ropes 200 in sequence, and the cut culture ropes 200 fall onto the tray assembly 41 of the receiving device 4 in sequence. The daughter boat 1 travels to the area where the lifting device 5 is located - in this embodiment, it is the stern open slot 203 - the lifting device 5 removes the receiving device 4 from the daughter boat 1, the first clamping assembly 11 and the second clamping assembly 44 are separated, the daughter boat 1 with the receiving device 4 removed travels away from the stern open slot 203, and the lifting device 5 lifts the receiving device 4 to a preset height above the water surface in preparation for transferring the cultivation ropes 200 and oysters 400 in the receiving device 4. After the cultivation ropes 200 and oysters 400 in the receiving device 4 are emptied, the lifting device 5 lowers the receiving device 4 to below the water surface, the daughter boat 1 travels to the stern open slot 203, and the lifting device 5 installs the receiving device 4 on the daughter boat 1, at which time the first clamping assembly 11 and the second clamping assembly 44 are clamped in preparation for the next harvesting operation.

[0057] The present invention suspends a rope cutting device 3 and a receiving device 4 on a sub-boat 1, and the sub-boat 1 carries the rope cutting device 3 and the receiving device 4 to the waters where the seafood to be harvested is located, and uses two cutting knife components 30 of the rope cutting device 3 to cut off the two ends of the culture rope 200 to separate it from the main rope 100, and then uses the receiving device 4 to receive the cut culture rope 200 and the seafood such as oysters 400 grown on the culture rope, and then drives the sub-boat 1 to the stern open groove 203, and uses the lifting device 5 to lift the receiving device 4 from underwater to facilitate unloading of the culture rope 200 and oysters 400 in the receiving device 4, thereby completing the underwater harvesting of the seafood; and then uses the lifting device 5 to sink the receiving device 4 again until the tray component 41 enters the water, and installs the receiving device 4 on the sub-boat 1 to prepare for the next underwater harvesting operation, thereby realizing underwater mechanized harvesting, improving the harvesting efficiency and reducing the phenomenon of seafood falling due to the culture rope being pulled out of the water.

[0058] In addition, the hanging assembly 43 and the second clamping assembly 44 in this embodiment are both arranged at the upper end of the connecting rod 42. The lifting device 5 can lift the receiving device 4 and also detach or install the receiving device 4 on the daughter boat 1 by applying force on the hanging assembly 43. Thus, the oysters 400 on the receiving device 4 can be transferred from underwater to the surface of the water by the lifting of the lifting device 5 and the movement of the daughter boat 1 on the water surface, which simplifies the operation process and mechanical structure and facilitates control. In other embodiments, the disassembly and assembly between the receiving device 4 and the daughter boat 1 can also be achieved by means other than the lifting device, such as the screw connection between the upper end of the connecting rod 42 and the side of the daughter boat 1. When it is necessary to separate the daughter boat 1 and the receiving device 4, the lifting device 5 pulls the hanging assembly 43 to prevent the receiving device 4 from sinking directly in the water after the daughter boat 1 and the receiving device 4 are separated, and then the screw connection between the upper end of the connecting rod 42 and the side of the daughter boat 1 is released, and the daughter boat 1 drives away from the stern open slot 203, and the lifting device 5 lifts the receiving device 4 upwards.

[0059] The lifting device 5 of this embodiment is arranged on the mother ship 2, so as to facilitate the movement of the harvesting ship (including the daughter ship 1 and the mother ship 2) along with the harvesting sea area. In other embodiments, the lifting device 5 can be arranged on a fixed platform to improve the stability of the lifting device 5.

[0060] In this embodiment, the mother ship 2 is provided with a stern open slot 203 to facilitate the lifting operation of the lifting device 5, and can also increase the strength of the two-tray lifting mechanism 50 of the lifting device 5, thereby increasing the weight of oysters harvested in a single harvest, reducing the number of harvests and improving the harvesting efficiency. In other embodiments, the stern open slot 203 may not be provided, but the lifting device 5 may be extended to the rear side of the hull of the mother ship 2 in a cantilever manner. The mother ship 2 designed in this way is closer to a conventional ship in the prior art, that is, a lifting device 5 (such as a winch mechanism) can be added to a conventional ship to cooperate with the daughter ship to lift and store oysters 400.

[0061] The seafood stacking area 201 of the mother ship 2 is provided with a placement slot for stacking the cut culture ropes 200 and oysters 400, and cargo lifting and driving mechanisms 6 are provided on both sides of the placement slot, which include a track 61 extending along the front and rear direction of the mother ship hull and a crane 62 movably arranged on the track 61, and the crane 62 is used to transport the culture ropes 200 and oysters 400 shipped by the receiving device 4 from the lifting area 202 to the seafood stacking area 201. In addition, in order to facilitate the transportation of oysters 400, a net bag can be laid on the tray assembly 41, wherein the laying and fixing methods of the net bag are conventional technologies in the field and will not be repeated here.

[0062] See also Figure 3 As shown, the tray lifting mechanism 50 includes a column 51 extending up and down, a rack 52 fixedly connected to the column 51 is provided on the column 51, the rack 52 is meshed and transmission-connected with a gear 53, the gear 53 is connected to the output shaft of a lifting motor 54, the lifting motor 54 is fixedly connected to a lifting slider 55, the lifting slider 55 extends to the side where the stern open slot 203 is located to form a suspension arm 56, and the tray lifting mechanism 50 is connected to the hanging assembly 43 through the suspension arm 56 to drive the receiving device 4 to rise and fall. The output shaft of the lifting motor 54 rotates to drive the gear 53 to rotate, and under the meshing transmission of the gear and rack, the gear 53, the lifting motor 54, the lifting slider 55 and the suspension arm 56 move up and down along the extension direction of the rack 52, thereby driving the receiving device 4 to rise and fall. In other embodiments, the lifting motor 54 and the gear 53 may be fixed in the up and down directions, and the boom 56 may be relatively fixedly connected to the rack 52, so that the rack 52 and the boom 56 are lifted and lowered by the rotation of the lifting motor 54 and the gear 53, thereby driving the receiving device 4 to lift and lower.

[0063] See also Figures 9 to 11 As shown, the hanging assembly 43 includes a boom holder 431 fixedly arranged at the upper end of the connecting rod 42, a boom lock block 432 is bolted to the boom holder 431, and a groove for accommodating the boom 56 is provided on the upper surface of the boom holder 431. When the boom holder 431 and the boom lock block 432 are locked and connected, a boom hole 433 is formed at the groove. Through the threaded connection between the boom holder 431 and the boom lock block 432, the boom hole 433 can be opened to facilitate the boom 56 to enter and exit the boom hole 433. When the receiving device 4 is hoisted, the boom holder 431 and the boom lock block 432 are locked to ensure that the receiving device 4 is reliably hoisted. The side walls of the boom 56 and the boom hole 433 match to form a anti-rotation fit, that is, the side walls of the boom 56 and the boom hole 433 are both non-circular structures. The boom 56 and the boom hole 433 of this embodiment are both rectangular structures, which prevent the boom 56 and the boom hole 433 from rotating relative to each other, thereby preventing the receiving device from tipping over due to unexpected rotation.

[0064] The pallet lifting mechanism 50 and the hanging assembly 43 of this embodiment are connected by a laterally extending suspension arm 56. In other embodiments, the pallet lifting mechanism 50 can also be formed by a winch. Specifically, a winch motor is arranged at the upper end of the column 51, the output end of the winch motor is connected to a rope or chain and a hook is arranged at the lower end of the rope or chain, and a hook hole for the hook is arranged at the upper end of the connecting rod 42, thereby forming a connection between the pallet lifting mechanism 50 and the receiving device 4. The rotation of the winch motor can drive the receiving device 4 to rise and fall. Of course, when the winch is used to lift the receiving device, the receiving device may tip over due to the change in the center of gravity of the receiving device. An anti-tip mechanism should be provided. For example, the hooking position is adjustable in the front and rear directions, or the winch prevents the receiving device from tipping over by hooking a slider with a suspension arm 56. At this time, the slider is arranged inside the column to slide up and down. It can be seen that the cooperation between the rectangular structure of the suspension arm 56 and the suspension arm hole 433 in this embodiment can prevent the receiving device from tipping over, thereby preventing the oysters in the tray assembly 41 from falling off during the lifting process.

[0065] In addition, in addition to setting up two opposing tray lifting mechanisms 50, it is also possible to set up only one lifting motor above the two hanging components 43 and pull the two hanging components 43 through two ropes or chains, so as to achieve the lifting and lowering of the receiving device 4. Similarly, in the scheme in which the lifting motor and the two ropes or chains cooperate to pull the two hanging components 43, attention should also be paid to the anti-rollover of the receiving device. The specific method can be to set the connection point between the rope or chain and the hanging component to be movable forward and backward, or to add other anti-rollover structures, which will not be repeated here.

[0066] See also Figures 7 to 10As shown, the first clamping assembly 11 includes a support arm 111 connected to the hull of the daughter boat 1 and protruding to one side thereof, and two guide plates 112 connected to the support arm 111, and the two guide plates 112 are used to clamp on both sides of the connecting rod 42. The second clamping assembly 44 includes a hook member 441 arranged on one side of the connecting rod 42, and the hook member 441 is provided with an opening, and the hook member 441 is used to be clamped on the support arm 111 through the opening, so that the receiving device 4 is clamped by the two guide plates 112 by the connecting rod 42 and the hook member 441 is clamped on the support arm 111 and is suspended on the daughter boat 1. The hook member 441 in this embodiment is a right-angle plate member, and its opening is facing downward, and the support arm 111 is a rectangular rod, so that the support arm 111 is detached from the opening of the hook member 441 when the receiving device 4 is hoisted upward by the lifting device 5 as a whole. In other embodiments, the hook member 441 may also be a polygonal plate member whose inner wall is other polygonal shapes (such as a triangle or trapezoid whose width gradually increases from top to bottom). As long as the support arm 111 can be detached from the opening of the hook member 441 and the support arm 111 can enter the hook member 441 from the opening of the hook member 441 as the supporting device 4 moves, the disassembly and assembly of the two can be achieved.

[0067] In order to facilitate the hook member 441 and the support arm 111 to form a snap connection, the connecting rod 42 is inserted into the guide groove between the two guide pieces 112, so that the connecting rod 42 is restricted between the two guide pieces 112, so that the hook member 441 and the support arm 111 form a vertical alignment, so that the hook member 441 can be hooked on the support arm 111 to form a snap connection during the subsequent descending process of the hook member 441. The guide piece 112 of this embodiment is a thick piece with an obtuse bend, and the bending angles of the two guide pieces 112 are respectively oriented in directions away from each other, thereby forming a guide groove with a guiding function, which can guide the connecting rod 42 so that the two can be quickly and accurately connected. The hook member 441 and the support arm 111 can also be positioned in the left-right direction and the initial positioning in the front-back direction by the connecting rod 42 being located in the guide groove, thereby reducing the relative position deviation of the hook member 441 and the support arm 111, and facilitating the snap connection of the hook member 441 and the support arm 111. In addition, in order for the hook member 441 to be hooked to the support arm 111 smoothly, there should be a certain gap between the guide groove formed by the two guide plates 112 and the connecting rod 42 so that the connecting rod 42 can slide up and down in the guide groove.

[0068] In order to facilitate the engagement between the hook member 441 and the support arm 111, the opening of the hook member 441 is set relatively large. However, there will inevitably be some fluctuations when the daughter ship sails on the sea, and there is a risk that the hook member 441 and the support arm 111 will be disengaged, which will cause the receiving device 4 to be separated from the daughter ship 1. Therefore, a locking pin is also provided between the support arm 111 and the hook member 441 to ensure the reliability of the connection between the daughter ship 1 and the receiving device 4. When it is necessary to separate the daughter ship 1 and the receiving device 4, the operator removes the locking pin in advance.

[0069] See also Figure 10 to Figure 11 As shown, the tray assembly 41 includes a tray 411 and a baffle surrounding the outside of the tray, the baffles located on the left and right sides of the tray 411 are movable baffles 412, and the baffles located on the front and rear sides of the tray are fixed baffles 413. The lower end of the movable baffle 412 is hinged to the tray 411, and the upper end of the movable baffle 412 is connected to a flexible connector 414, which extends to the upper end of the connecting rod 42. The movable baffle 412 is flipped relative to the tray 411 by the lifting and lowering of the flexible connector, thereby selectively extending the width of the tray 411 in the left and right directions. During the voyage of the sub-ship 1, the baffles around the tray 411 can prevent the cultivation ropes 200 and oysters 400 on the tray assembly 41 from falling under the action of the water flow. The left and right baffles are set as movable baffles because there are multiple rows of main ropes in the farm, both ends of which extend toward the sea and are fastened to the seabed, and both ends of the cultivation ropes 200 are connected to two adjacent main ropes. During the cutting of a row of cultivation ropes 200, the vibration may cause the oysters in the adjacent surroundings to fall, so the baffles are appropriately extended to maximize the oysters and reduce the number of oysters falling into the sea. However, the unfolded baffles cannot enter or exit between the two sets of main ropes, so it is necessary to enter and then open, and then fold and drive out of the two main ropes. In addition, when the tray assembly 41 is being lifted or lowered, the tray lifting mechanism 50 is set on both sides of the tray assembly 41, and the movable baffles 412 rotate and fold in the direction of the tray 411 during the lifting process to prevent the tray assembly 41 from interfering with the tray lifting mechanism 50.

[0070] The flexible connector 414 connecting the movable baffle 412 can be a rope or a chain. In order to prevent the rope or chain from drifting around under the action of the waves and affecting the harvesting operation, such as causing the movable baffle 412 to flip unexpectedly, a plurality of limiting rings are arranged at intervals on the side of the connecting rod 42, and the flexible connector 414 is inserted into the limiting rings, and its upper end is fixed to the topmost limiting ring, such as being tied to the topmost limiting ring.

[0071] In other embodiments, no baffles may be provided around the tray 411, or all baffles may be provided as fixed baffles or movable baffles.

[0072] See also Fig. 9 , Fig.12 and Fig.13As shown, the two cutter assemblies 30 of the rope cutting device 3 are respectively connected to a connecting rod 42. The cutter assembly 30 includes a suspension rod 31, a first guide plate 32 and a cutter 33. The first guide plate 32 is connected to the lower end of the suspension rod 31. The first guide plate 32 is provided with a rope cutting groove 321. The cutter 33 is located in the rope cutting groove 321 for cutting the aquaculture rope 200. The cutter 33 is a circular sawtooth knife, which is driven to rotate by a cutting motor 34. The cutting motor 34 is arranged at the upper end of the suspension rod 31. The cutter 33 can also be a linear sawtooth knife, which cuts the aquaculture rope 200 by linear reciprocating movement. Since the cutter assembly 30 of this embodiment is connected to the receiving device 4, the electrical connection between the cutting motor 34 and the power supply device must be disconnected during the process of hoisting the receiving device 4. In this embodiment, the cutting motor 34 is arranged at the upper end of the suspension rod 31, which is closer to the daughter ship 1 than being arranged near the cutter 33, so as to be connected to the power supply device on the daughter ship 1, and it is convenient for the operator to connect the cutting motor 34 to the power supply device. The cutting motor 34 is out of the water, which is conducive to the waterproofing of the motor.

[0073] The front end of the first guide plate 32 is provided with a guide portion 322 extending outward. Since oysters are cultured at sea, the culture rope 200 fluctuates to a certain extent under the action of waves, and it is difficult to see underwater, so it is possible that both ends of the culture rope 200 cannot be completely gathered between the two first guide plates 32. Therefore, the guide portion 322 on the first guide plate 32 can increase the distance between the front ends of the two first guide plates 32, and bring the culture rope 200 floating underwater between the two cutter assemblies 30 as much as possible, thereby improving the reliability of cutting.

[0074] The first guide plate 32 is provided with a second guide plate 35, and a limiting groove 36 for accommodating the aquaculture rope 200 is formed between the first guide plate 32 and the second guide plate 35, and the cutter 33 spans the limiting groove 36. Under the action of the waves, the aquaculture rope 200 may also move along the area between the two first guide plates 32, and the limiting groove 36 formed by the first guide plate 32 and the second guide plate 35 plays a role in limiting the aquaculture rope 200 from the left and right sides. The cutter 33 spans the limiting groove 36 to ensure that the aquaculture rope 200 located in the limiting groove 36 is reliably cut, further improving the reliability of cutting.

[0075] The second guide plate 35 of this embodiment is much smaller than the first guide plate 32. This is because the first guide plate 32 plays the main role of guiding and limiting. When the culture rope is limited between the two first guide plates 32, due to the certain weight of the oysters 400 and other seafood, the culture rope 200 basically presents a falling shape, so the movement range is small. The second guide plate 35 only needs to cooperate with the first guide plate 32 to limit the culture rope close to the cutter 33, so it does not need to be set too large. In addition, if the second guide plate 35 is also set to be very large and the front end extends to the vicinity of the guide part 322 of the first guide plate 32, it will cause the space left for the culture rope 200 at the front end of the first guide plate 32 to be too small, and the culture rope may pass between the two second guide plates 35.

[0076] According to different breeding scales, the length of the breeding rope 200 will also vary to a certain extent, and the intervals between the main ropes 100 will also vary. For this reason, in this embodiment, the cutter assembly 30 is set to be adjustable up and down, left and right relative to the hull of the daughter boat. The specific adjustment method is: the cutter assembly 30 is connected to the connecting rod 42 through the cross connection assembly 37, and more specifically, it is connected to the boom holder 431 fixedly set at the upper end of the connecting rod 42. Therefore, the cutter assembly 30 is indirectly connected to the connecting rod 42 through the cross connection assembly 37 and the boom holder 431. In other embodiments, the cutter assembly 30 can also be connected to the connecting rod 42 only through the cross connection assembly 37.

[0077] The cross connection assembly 37 includes a first slide rod sleeve 371 and a second slide rod sleeve 372 that are perpendicular to each other. The first slide rod sleeve 371 is provided with a first slide rod 373 in a sliding sleeve, and the second slide rod sleeve 372 is provided with a second slide rod 374 in a sliding sleeve. The first slide rod sleeve 371 forms a relatively fixed connection relationship with the connecting rod 42 through the suspension arm bracket 431, the second slide rod sleeve 372 is fixedly connected to the first slide rod 373, and the upper end of the suspension rod 31 of the cutter assembly 30 is fixedly connected to the second slide rod 374. The first slide bar sleeve 371 extends in the up-down direction, and the second slide bar sleeve 372 extends in the left-right direction. A fixing bolt is provided between the first slide bar 373 and the first slide bar sleeve 371. The first slide bar 373 is provided with a plurality of adjustment holes spaced apart in the up-down direction. The relative position of the first slide bar 373 and the first slide bar sleeve 371 is adjusted by connecting any of the adjustment holes with the fixing bolt. Accordingly, a fixing bolt is also provided between the second slide bar 374 and the second slide bar sleeve 372, and the second slide bar 374 is provided with a plurality of adjustment holes spaced apart in the left-right direction. The position of the cutter assembly 30 is adjusted by moving the first slide bar 373 and the second slide bar 374. In other embodiments, the positions of the two cutter assemblies 30 may also be adjusted by a rocker mechanism.

[0078] The two cutter assemblies 30 of the above embodiment are respectively arranged corresponding to the two connecting rods 42, which can ensure that the two cutter assemblies 30 are kept on both sides of the daughter boat hull and facilitate the adjustment of the position of the cutter assemblies 30, and on the other hand, the cutter assemblies 30 are lifted up and out of the water surface for easy maintenance. In other embodiments, the two cutter assemblies 30 of the rope cutting device 3 can also be connected to the daughter boat 1 to reduce the lifting burden of the lifting device 5.

[0079] See also Figure 7 , Figure 8 and Fig.14 As shown, the daughter boat 1 is driven by a hydrodynamic device 12, which includes a water pump 121 and a water pipe group 120. The water pipe group 120 includes a water inlet pipe 122 and a plurality of water outlet pipes 123. The water inlet pipe 122 is connected to the water pump 121 and the water inlet of the water inlet pipe 122 is arranged at the bottom of the daughter boat 1. The water outlet pipes include a front water outlet pipe 1231, a rear water outlet pipe 1232, a left front water outlet pipe 1233, a right front water outlet pipe 1234, a left rear water outlet pipe 1235 and a right rear water outlet pipe 1236. The front water outlet pipe 1231 and the rear water outlet pipe 1232 are respectively The left front water outlet pipe 1233 and the right front water outlet pipe 1234 are respectively connected to the two water outlets of a left and right front control valve 125, the left rear water outlet pipe 1235 and the right rear water outlet pipe 1236 are respectively connected to the two water outlets of a left and right rear control valve 126, the water inlets of the front and rear control valves 124, the left and right front control valves 125 and the left and right rear control valves 126 are all connected to the water outlet of the water pump 121, and each control valve is a three-way valve, so that the two water outlet pipes 123 connected to the same control valve are closed at the same time or one of them is selected to discharge water. Each control valve in this embodiment is a water volume control valve, which can also control the water volume of the water outlet pipe connected to its water outlet. The water pump 121 in this embodiment is a variable frequency water pump.

[0080] The water outlets of the front water outlet pipe 1231, the rear water outlet pipe 1232, the left front water outlet pipe 1233, the right front water outlet pipe 1234, the left rear water outlet pipe 1235 and the right rear water outlet pipe 1236 are arranged around the side of the hull, and the water outlet from the corresponding water outlet pushes the hull to move in the opposite direction of the water outlet.

[0081] The process of the hydrodynamic device 12 controlling the movement of the sub-boat 1 includes: the water pump 121 pumps water from the water inlet at the bottom of the boat, and the pumped water is respectively controlled by the front and rear control valves 124, the left and right front control valves 125, and the left and right rear control valves 126 to control the water output of the corresponding water outlet pipes. When only the left and right front control valves 125 are manipulated, the bow can be pushed to turn left or right; when only the left and right rear control valves 126 are manipulated, the stern can be pushed to turn left or right; when only the front and rear control valves 124 are manipulated, the sub-boat 1 can move forward or backward. If the left and right front control valves 125 and the left and right rear control valves 126 are operated to the same side at the same time, the sub-boat 1 will shift sideways. By changing the speed of the water pump 121, the displacement of the pump can be changed, thereby increasing or decreasing the force of the water pushing the hull to move.

[0082] In other embodiments, propellers can also be used to control the navigation of the sub-ship, and a rudder for controlling the steering of the hull should also be equipped. Compared with the use of propellers and rudders to control the navigation of the hull, the hydrodynamic propulsion method used in this embodiment has the following advantages: making the propulsion structure simple and easy to control the hull; secondly, avoiding the deflection caused by the propeller pushing the ship, which requires the use of a pressure rudder to correct the course; thirdly, if a single propeller is used for propulsion, it is impossible to achieve in-situ rotation and sideways movement, and the posture of the ship needs to be adjusted during travel, which is not conducive to the control of the ship during harvesting operations; finally, in the breeding area, the propeller is prone to the risk of being entangled by ropes.

[0083] See also Figure 7 and Fig.15 As shown, since the culture rope 200 and the cutter assembly 30 being cut are both operated underwater, it is not conducive for the operator to observe the relative position of the culture rope 200 and the cutter assembly 30, nor is it conducive to accurate cutting. Only the buoy 300 floats on the water surface. For this reason, the daughter boat 1 is provided with a position indicating rod 13, which is fixedly connected to the hull of the daughter boat 1 through a vertical rod 14, and the two ends of the position indicating rod 13 correspond to the cutter assembly 30. Preferably, the position indicating rod 13 extends along the left and right directions, and its length is equal to the spacing between the two cutter assemblies 30, so that the two ends of the position indicating rod 13 are flush with the cutter assembly 30 in the vertical direction, so as to facilitate the observation of the position of the cutter assembly 30 located underwater in the left and right direction. In other embodiments, it is also feasible that the length of the position indicating rod 13 is slightly smaller than the spacing between the two cutter assemblies 30, which can not only play the role of indicating, but also prevent the position indicating rod 13 from interfering with the tray lifting mechanism 50 when the daughter boat 1 travels to the stern open slot 203.

[0084] See also Figure 2 and Figures 15 to 17 As shown, the workflow of the present invention is as follows:

[0085] The process takes the state where the rope cutting device 3 and the receiving device 4 are hung on the lifting device 5 as the initial state. At this time, the oysters 400 from the previous harvesting operation process have been unloaded and stored in the seafood storage area 201.

[0086] Lay the net bag flat on the pallet 411 and tie it up briefly, then lower the rope cutting device 3 and the receiving device 4 hung on the boom 56 of the pallet lifting mechanism 50 until the hook 441 of the receiving device 4 is slightly higher than the support arm 111 of the daughter boat 1. Start the generator to power the daughter boat, start the water pump 121, drive the daughter boat 1 into the stern open slot 203 in the mother ship 2 by manipulating each control valve, and insert the connecting rod 42 between the guide pieces 112 until the connecting rod 42 abuts against the bottom of the limit slot between the guide pieces 112, stopping the daughter boat 1. The pallet lifting mechanism 50 continues to descend until the hook 441 is engaged with the support arm 111 of the daughter boat 1, and then tighten the bolt or safety pin at the hook 441. At this time, the two cutter assemblies 30 are in an inwardly retracted state (i.e., the position closest to the hull of the daughter boat 1 in the left and right directions), and the movable baffle 412 of the pallet assembly 41 is also in a retracted state. Release the arm lock block 432 of taking off the left and right wings, and raise the arm 56 to a height. Then, the daughter ship 1 moves backwards away from the mother ship 2.

[0087] The sub-boat 1 enters the breeding area to be harvested, carefully drives in between the two main ropes 100, and adjusts the position of the sub-boat with the help of the relative positions of the position indicating rod 13 and the float 300. When the sub-boat 1 is adjusted to be in the middle of the two main ropes 100 and before reaching the position of the first breeding rope 200, loosen the flexible connector 414 connected to the movable baffle 412, lift the movable baffle 412 of the tray assembly 41 to the appropriate position and then fix it. Then lift the cutter assemblies 30 of the left and right wings to the appropriate position and fix them with locking pins or bolts. Connect the tangent motor 34 to the sub-boat cable, start the tangent motors 34 of the left and right wings, and operate the control valves to keep the sub-boat 1 moving slowly along the middle of the two main ropes 100. During the movement of the sub-boat 1, the branch rope suspended between the two main ropes 100 will gradually slide up along the first guide plate 32 of the left and right wing cutter assemblies 30, and slide towards the limit groove 36 under the guidance of the second guide plate 35, and finally cut off the two ends of the culture rope 200 under the high-speed rotation of the cutter 33, and the culture rope 200 with oyster strings will sink into the tray 411 located below. As the sub-boat 1 continues to move slowly, strings of oyster strings are harvested. When the sub-boat 1 harvests the oysters on the last culture rope 200, the upper end of the flexible connector 414 tied to the left and right wing baffles is pulled up to close the two wing movable baffles 412 of the receiving device. The power supply of the left and right wing tangent motors 34 is stopped, and the connection with the sub-boat cable is disconnected. Then the two wing cutter assemblies 30 are retracted and fixed with locking pins. Then, after carefully driving out between the two main ropes 100, drive into the stern open slot 203 in the mother ship 2. Carefully operate, the daughter ship 1 is parked at a position where the boom 56 of the two tray lifting mechanisms 50 can be buckled into the boom hole 433 respectively.

[0088] Operate the two pallet lifting mechanisms 50 of the lifting device 5, lower the arm 56 and place it in the arm hole 433, cover the arm lock block 432, tighten it with bolts, and remove the safety pin or bolt on the hook 441. Operate the two pallet lifting mechanisms 50 to make the arms 56 of the two wings rise synchronously until the hooks 441 of the left and right wings leave the left and right support arms 111 of the daughter ship, and then stop the pallet lifting mechanisms 50. After the daughter ship 1 is operated to reverse and drive out of the mother ship 2, continue to operate the two pallet lifting mechanisms 50 to rise synchronously, and stop when the receiving device 4 is lifted until the pallet 41 is exposed to an appropriate height above the water surface.

[0089] The cargo lifting mechanism 6 is operated to move and lower the lifting hook of the crane 62, so that the lifting hook is placed above the pallet 411 to facilitate the lifting position of the net bag to lift the oysters. After hanging the ropes at the four corners of the net bag, the net bag and the oysters therein are lifted off the pallet 411 and moved to the seafood stacking area 201. After briefly cleaning the pallet, an empty flat net bag is laid on the pallet and the four corners of the net bag are tied and fixed.

[0090] Although the present invention has been specifically shown and described in conjunction with the preferred embodiments, those skilled in the art should understand that the remaining undescribed portions are prior art, and that various changes made to the present invention in form and detail without departing from the spirit and scope of the present invention as defined in the appended claims shall fall within the scope of protection of the present invention.

Claims

1. A seafood harvesting vessel, characterized in that: The invention comprises a daughter boat, wherein the daughter boat is suspended with a rope cutting device and a receiving device, wherein the rope cutting device is provided with two cutting knife assemblies for cutting the two ends of the aquaculture rope respectively, and the two sets of the cutting knife assemblies are arranged on the left and right sides of the daughter boat respectively, and the receiving device is used to receive the aquaculture rope and the seafood connected to the aquaculture rope that are cut by the rope cutting device and fall off, and the receiving device is detachably connected to the daughter boat; and further comprises a lifting device, wherein the lifting device is used to lift the receiving device out of the water surface so as to transfer the aquaculture rope and the seafood in the receiving device; The process of harvesting seafood includes: The daughter boat with the rope cutting device and the receiving device suspended thereon travels to the aquaculture area where the marine products are to be harvested, the two cutting knife assemblies of the rope cutting device simultaneously cut the two ends of the aquaculture rope, and the receiving device receives the cut aquaculture rope; as the daughter boat travels along the spaced arrangement direction of the aquaculture ropes, the rope cutting device cuts the aquaculture ropes in sequence, and the cut aquaculture ropes fall into the receiving device in sequence; the daughter boat travels to the area where the lifting device is located, the lifting device is connected to the receiving device, the receiving device and the daughter boat are separated, the daughter boat unloaded from the receiving device travels away from the area where the lifting device is located, the lifting device lifts the receiving device to a preset height above the water surface, so as to prepare for the transfer of the aquaculture ropes and the marine products in the receiving device; after the aquaculture ropes and the marine products in the receiving device are emptied, the lifting device lowers the receiving device to below the water surface, the daughter boat travels to the area where the lifting device is located, and the lifting device installs the receiving device on the daughter boat, so as to prepare for the next harvesting operation.

2. A marine product harvesting vessel according to claim 1, characterized in that: The receiving device includes a pallet assembly, two connecting rods and two groups of hanging assemblies, the pallet assembly and the hanging assembly are respectively connected to the two ends of the connecting rod, and the two connecting rods are respectively connected to the left and right sides of the pallet assembly; the lifting device is installed on a mother ship, and the lifting device includes two pallet lifting mechanisms, each of which is arranged corresponding to one of the hanging assemblies; the daughter ship is connected with a first clamping assembly, and each of the connecting rods of the receiving device is connected with a second clamping assembly, and the first clamping assembly and the second clamping assembly form a detachable clamping relationship; the lifting device lifts and lowers the receiving device by connecting to the hanging assembly, and as the receiving device is lifted or lowered, the first clamping assembly and the second clamping assembly are separated or clamped, so that the receiving device and the daughter ship are separated or connected.

3. A marine product harvesting vessel according to claim 2, characterized in that: The first clamping assembly includes a support arm connected to the hull of the sub-boat and protruding to one side thereof, and two guide plates connected to the support arm, the two guide plates are used to clamp on both sides of the connecting rod; the second clamping assembly includes a hook member arranged on one side of the connecting rod, the hook member is provided with an opening, the hook member is used to be hooked to the support arm through the opening, so that the receiving device is clamped by the two guide plates with the help of the connecting rod and the hook member is hooked to the support arm and is suspended on the sub-boat.

4. A marine product harvesting vessel according to claim 2, characterized in that: The mother ship includes a seafood stacking area and a lifting area distributed along the front and rear of the hull. The lifting area is provided with an open stern slot for the daughter ship to dock. The pallet lifting mechanism is installed on the left and right sides of the stern open slot so that the pallet lifting mechanism can perform lifting operations on the receiving device located at the stern open slot.

5. The marine product harvesting vessel according to claim 2, characterized in that: The tray assembly includes a tray and a baffle surrounding the outside of the tray, the baffles located on the left and right sides of the tray are movable baffles, and the baffles located on the front and rear sides of the tray are fixed baffles. The lower end of the movable baffle is hinged to the tray, and the upper end of the movable baffle is connected to a flexible connector, which extends to the upper end of the connecting rod. The movable baffle is flipped relative to the tray by lifting and lowering the flexible connector, thereby selectively extending the width of the tray in the left and right directions.

6. The marine product harvesting vessel according to claim 1, characterized in that: The receiving device includes a tray assembly and two connecting rods, the two connecting rods are respectively connected to the left and right sides of the tray assembly, and the two cutter assemblies of the rope cutting device are respectively connected to one of the connecting rods; the cutter assembly includes a suspension rod, a first guide plate and a cutter, the first guide plate is connected to the lower end of the suspension rod, the first guide plate is provided with a rope cutting groove, the cutter is located in the rope cutting groove for cutting the breeding rope, and the front end of the first guide plate is provided with a guide portion extending outward.

7. A marine product harvesting vessel according to claim 6, characterized in that: A second guide plate is disposed on the first guide plate, a limiting groove for accommodating the breeding rope is formed between the first guide plate and the second guide plate, and the cutting knife spans the limiting groove.

8. The marine product harvesting vessel according to claim 6, characterized in that: The cutter assembly is connected to the connecting rod through a cross connection assembly, and the cross connection assembly includes a first sliding rod sleeve and a second sliding rod sleeve that are perpendicular to each other. The first sliding rod sleeve is provided with a first sliding rod in a sliding sleeve, and the second sliding rod sleeve is provided with a second sliding rod in a sliding sleeve. The first sliding rod sleeve forms a relatively fixed connection relationship with the connecting rod, the second sliding rod sleeve is fixedly connected to the first sliding rod, and the upper end of the suspension rod of the cutter assembly is fixedly connected to the second sliding rod.

9. The marine product harvesting vessel according to claim 1, characterized in that: The sub-boat is driven by a hydrodynamic device, which includes a water pump and a water pipe group. The water pipe group includes a water inlet pipe and a plurality of water outlet pipes. The water inlet pipe is connected to the water pump and the water inlet of the water inlet pipe is arranged at the bottom of the sub-boat. The water outlet pipes include a front water outlet pipe, a rear water outlet pipe, a left front water outlet pipe, a right front water outlet pipe, a left rear water outlet pipe and a right rear water outlet pipe. The front water outlet pipe and the rear water outlet pipe are respectively connected to two water outlets of a front and rear control valve, the left front water outlet pipe and the right front water outlet pipe are respectively connected to two water outlets of a left and right front control valve, the left rear water outlet pipe and the right rear water outlet pipe are respectively connected to two water outlets of a left and right rear control valve, the water inlets of the front and rear control valves, the left and right front control valves and the left and right rear control valves are all connected to the water outlet of the water pump, and each control valve is a three-way valve, so that the two water outlet pipes connected to the same control valve are closed at the same time or one of them is selected to discharge water.

10. The marine product harvesting vessel according to claim 1, characterized in that: The daughter boat is provided with a position indicating rod, which is fixedly connected to the hull of the daughter boat, and the two ends of the position indicating rod correspond to the cutter assembly, so as to facilitate the observation of the position of the cutter assembly located underwater in the left and right directions.

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