919 results about "Shellfish" patented technology

The invention discloses a method for detecting the biological enrichment microplastic degree of bivalve mollusks in a deep sea extreme environment. According to the method, biocenosis is sampled to acquire a community structure representing a biological bed layer, then morphological characterization statistics is carried out to classify age stage data of shellfish individuals, a multivariate factor analysis method is used to obtain the shellfish individuals with the largest contribution degree in each classification age stage, then tissue-divided micro-plastic extraction is carried out, and the classification age stage data of the shellfish individuals with the largest contribution degree is obtained. The method comprises the following steps: reducing the form of seabed micro-plastics, carrying out process identification on full-size micro-plastics, tracing the duration of adsorbing the micro-plastics by each shellfish monomer by virtue of a carbon-14 dating method, and constructing a seabed shellfish dynamic enrichment curve by splicing the life of each shellfish; and finally amplifying to the whole shellfish bed layer to deduce the microplastic enrichment rate and historical accumulation amount of the whole extreme ecosystem. The method provides a scientific basis and a technical support for formulating an effective marine environment protection strategy and clarifying a marine micro-plastic source-sink relationship.

A pneumatically controlled aquaculture apparatus is provided. The apparatus has a lift vessel that lifts containers holding shellfish out of the water when the lift vessel is floating in order to allow air desiccation to prevent bio-fouling of the equipment and shellfish. The apparatus has a floatation control tank positioned above the containers holding shellfish in a centered position of the apparatus. The apparatus also has a suspension buoy for suspending the apparatus in the water column. The apparatus may be deployed in two different suspended positions with either the floatation control tank or the suspension buoy floating on the water surface and the containers holding shellfish suspended below the surface. The apparatus may also be deployed in a submerged position in which the apparatus is resting on the water bottom.

The invention discloses a combined mudflat shellfish catching device and method. The combined mudflat shellfish catching device is mainly composed of a rack, a walking module, a catching module, a leaked sand cleaning module and a conveying module. The walking modules are installed on the two sides of the rack and responsible for walking and steering of the rack. The catching module comprises a roller soil breaker and a rolling shovel picker, and the roller soil breaker passively rotates along with advancing of the device and is used for pre-loosening soil; the rolling shovel picker actively and reversely rotates to shovel shellfish and surface sandy soil; the leaked sand cleaning module is composed of a vibration cleaning sieve, a planar four-bar mechanism and a vibration motor, screening and cleaning actions are driven by the vibration motor, and shellfish and sandy soil are subjected to hydraulic scouring by a cleaning nozzle; the conveying module comprises a hollow transverse conveying belt and an inclined conveying belt, the transverse conveying belt filters damaged or unqualified shellfish, and the inclined conveying belt lifts qualified shellfish to a rear collecting area. According to the device, the functions of soil loosening, picking, screening, cleaning and conveying are achieved through modular design, and the device is suitable for efficient catching operation of mud flat shellfishes.

The present invention aims to discover a new function of a composition comprising a combination of nicotinamide mononucleotide (NMN) and a food additive reducing agent derived from shellfish and natural zeolite, and to provide a use based on the new function. [Solution] The cell activator contains nicotinamide mononucleotide (NMN) and a food additive reducing agent obtained by adding baked shell powder obtained by pulverizing baked shells and baked zeolite powder obtained by pulverizing baked natural zeolite to water, subjecting them to a heat treatment in the water, and drying them.

The present invention relates to the field of offshore wind power generation, and specifically to an offshore wind power generation device, which includes a floating platform and a wind power generation component arranged at the upper end of the floating platform. A plurality of traction components for pulling the floating platform are arranged below the floating platform, and the traction component includes an L-shaped frame fixed to the lower end of the floating platform, a traction rope is slidably connected to the L-shaped frame, and one end of the traction rope is fixed to the seabed; a circular plate is arranged below the floating platform, and a lifting component for lifting the circular plate and a guide component for guiding the circular plate during the lifting process are arranged on the floating platform; an annular plate is provided on the outer surface of the traction rope, and a cleaning component for cleaning shellfish attached to the surface of the traction rope is provided at the lower end of the annular plate. During the power generation operation, the offshore wind power generation device of the present invention automatically scrapes and cleans the shellfish on the surface of the traction rope through the cleaning component, so as to prevent the shellfish on the surface of the traction rope from affecting the stable power generation operation of the offshore wind power generation device.

The invention relates to the technical field of marine ecology, in particular to an offshore wind power and marine ranch blue carbon synergistic effect optimization and scheduling control system which comprises a blue carbon dynamic monitoring module, a cross-time scale optimization module, an energy directional scheduling module, an ecological parameter compensation module and a synergistic effect feedback module. Wherein the blue carbon dynamic monitoring module is used for collecting an algae photosynthetic carbon sequestration rate, a shellfish calcification carbon sequestration rate, a seabed sediment carbon sequestration amount and environmental parameters in real time; the cross-time-scale optimization module is used for carrying out space-time alignment and generating a collaborative optimization strategy; and the energy directional scheduling module is used for dividing the electric energy output by the wind turbine generator according to priorities. According to the method, a blue carbon-wind power integrated collaborative optimization and scheduling mechanism is constructed, accurate alignment and dynamic regulation and control of different time scale carbon sink processes and wind power output are realized, and the collaborative capability of energy utilization efficiency and ecological carbon sink benefits is improved.

The invention relates to the technical field of shellfish breeding, in particular to a rapid microalgae breeding method for shellfish breeding based on a photobioreactor and a cement pool. The method comprises the following steps: firstly, optimizing a photobioreactor structure and an illumination layout, controlling a culture environment by matching with a multi-parameter regulation and control system, breeding microalgae seeds with high resistance and high carbon sequestration capacity, culturing to a preset density, and partially harvesting and inoculating into a cement pond, after partial harvest, the photobioreactor realizes continuous culture by supplementing disinfected seawater and nutritive salt; the harvested high-density microalgae are inoculated into a cement pond, nutritive salt is supplemented in a doubled mode, air and carbon dioxide mixed gas is used for continuous aerated culture, and the microalgae are promoted to rapidly reach the index growth period and used for being directly fed to shellfish larvae; according to the rapid microalgae breeding method for shellfish seedling culture, the yield and quality of microalgae are both considered, the success rate and productivity of aquatic seedling culture are effectively improved, the production cost and the labor intensity of workers are reduced, and the method is suitable for large-scale popularization.

The invention relates to the technical field of biological coast evaluation, in particular to a shellfish reef artificial biological coast construction effect evaluation method and a shellfish reef artificial biological coast construction effect evaluation system. According to the expected construction requirement of the shellfish reef artificial biological coast, multiple capture channels are obtained through evolution tensor decomposition in the dynamic evolution simulation model, the capture channels are used for evaluating and analyzing the construction effect of the target biological coast, and the current revetment inhabiting effect, revetment development capacity and shellfish reef life quality of the target biological coast are obtained; fitting and evaluating the inhabitation effect of the current revetment, the development capability of the revetment and the life quality of the shellfish reef through polar coordinates of a multi-dimensional evaluation polar map frame, and performing standard grade judgment to generate a construction effect evaluation result of the artificial biological coast of the shellfish reef. According to the method, a shellfish reef construction effect quantitative evaluation system taking the revetment inhabiting effect, the revetment development capability and the shellfish reef life quality as three dimensions can be constructed, and the rationality and scientificity of shellfish reef artificial biological coast construction effect evaluation are improved.

The invention discloses a shellfish carbon sequestration speed quantitative estimation method based on a neural network model, and belongs to the technical field of environmental science and ecology, and the method comprises the steps: obtaining water quality parameter data, building a water quality monitoring data set based on the water quality parameter data, and carrying out the preprocessing; performing data alignment on the shellfish growth data and the preprocessed water quality monitoring data set to obtain a time sequence data set; training a long-short term memory neural network model based on the time sequence data set, obtaining a predicted value of the pH value of the water body in a preset time period through the trained model and monitoring data obtained in real time, and calculating the release rate of carbonate ions, a carbon sequestration speed estimated value is obtained by combining the net absorption amount of carbon dioxide in the shellfish growth process in unit time; and calculating the total carbon sequestration amount of the shellfish in the whole water body based on the carbon sequestration speed estimated value. According to the method, accurate estimation of the carbon sequestration amount of the shellfish culture water body is realized through a method of combining high-precision sensing monitoring and a deep learning model.

The sand rake of the present invention includes: a filter body, having an open filtering space and a plurality of filtering holes distributed across all sides thereof, a front side of the filter body being formed as an inclined surface and having a top edge with a plurality of teeth, while a bottom side of the filter body being formed as a flat surface; a support component, disposed in the filtering space of the filter body; and a handle, disposed at a rear side of the filter body. Accordingly, by using the specially-structured filter body of the sand rake, it replaces the user's hand in collecting shellfish organisms, increasing the harvest yield and enhancing safety during use.

The invention relates to an aquaculture technology, in particular to a method for promoting growth of crassostrea gigas larvae and increasing the survival rate of the larvae, which comprises chitosan oligosaccharide treatment, namely soaking crassostrea gigas shell top larvae in culture seawater containing chitosan oligosaccharide. Compared with a control group, the growth speed of the larvae soaked with the chitosan oligosaccharide is remarkably increased, and the survival rate of the larvae in the chitosan oligosaccharide group after bacterial incubation is also remarkably increased. The chitosan oligosaccharide is proved to be capable of promoting the growth of the crassostrea gigas larvae and improving the bacterial infection resistance of the crassostrea gigas larvae, is safe and non-toxic, and has application potentials in multiple aspects of improving the growth performance of the larvae, enhancing the immunity of the larvae, improving the culture efficiency and the like and a wide market prospect in shellfish fry production. The method provided by the invention can effectively promote the growth of the crassostrea gigas larvae, improve the survival rate of the crassostrea gigas larvae under infection of common bacteria and reduce the production cost, and has important practical significance for promoting the development of the oyster breeding industry.

The utility model discloses a conical disc centrifugal shellfish seeding device, which relates to the field of fishery machinery and comprises a support frame, a material containing device and a rotatable centrifugal turntable are mounted on the support frame, the centrifugal turntable is in an inverted conical shape, a blanking port is arranged on the material containing device, and the centrifugal turntable is positioned below the blanking port; a plurality of material stirring blades are installed on the centrifugal rotating disc and arranged at intervals in the circumferential direction of the centrifugal rotating disc, the outer ends of the material stirring blades can be adjusted in an inclined mode upwards or downwards, and the material stirring blades can be adjusted in an inclined mode towards the two sides relative to the radius of the centrifugal rotating disc. The device can be used on a ship in a shallow sea or on a mud flat vehicle, is simple to operate, greatly increases the seeding breadth, improves the seeding uniformity, effectively improves the seeding efficiency, reduces the breakage rate of the spats, saves the labor cost, and improves the utilization efficiency of the spats and the mud flat.

The invention discloses a method for inducing ostrea rivularis triploid, and relates to the technical field of shellfish genetic breeding. The specific preparation method comprises the following steps: firstly, obtaining egg liquid and seminal fluid from gonads of female and male ostrea rivularis individuals, cleaning and curing the egg liquid, and adding the seminal fluid into the egg liquid after cleaning to obtain a fertilized egg solution; when the proportion of the first polar bodies in the eggs of the fertilized egg solution is 30-50%, adding an inducer into the fertilized egg solution for induction and cleaning to obtain induced fertilized eggs; and finally, hatching and screening the induced fertilized eggs to obtain D-shaped larvae, and culturing to obtain the crassostrea rivularis triploid population. The method for inducing the crassostrea rivularis triploid is high in triploid induction rate, high in final hatching rate, capable of stably surviving and good in application prospect.

The invention relates to the technical field of biological fouling prevention and treatment of water delivery pipelines, in particular to a multi-channel array ultraviolet advanced oxidation viscapula fouling prevention and treatment device for a water delivery pipeline, which comprises a front double-channel basket type filter used for filtering adult viscapula in a target risk pipeline in a single channel and switching to a standby channel when blockage reaches a limit value; the array ultraviolet water distribution pipe is used for distributing water flow in a balanced manner to prolong the total killing duration; the oxidant auxiliary cleaning module is used for feeding an environment-friendly medicament; the array ultraviolet killing tube is used for directly killing larvae and adult shellfishes of the macrobrachium nipponense through ultraviolet rays, and removing the larvae and byssus proteins of the macrobrachium nipponense attached to the tube through an ultraviolet activation environment-friendly medicament; the numerical control system is used for controlling the flow speed of the ultraviolet water distribution pipe, starting and stopping of the ultraviolet killing pipe and the putting amount of the oxidant auxiliary cleaning module. Therefore, the problem that it is difficult to conduct comprehensive, efficient, non-stop maintenance and environment-friendly confined water prevention and treatment on fouling of larvae and adult shellfish of macrobrachium fortunei in a water conveying pipeline through an existing method is solved.

To provide a shellfish culture system that is excellent in cost reduction.SOLUTION: A shellfish culture system includes: a culture water tank for culturing shellfish; a sedimentation tank that causes a counter flow with a water level difference to the culture water tank; and a purification tank for purifying the water of the sedimentation tank, where the water purified by the purification tank branches into a plurality of channels and is sprayed into the culture water tank.SELECTED DRAWING: Figure 1

The utility model relates to the technical field of shellfish cleaning, and discloses a flexible shellfish cleaning device which comprises a base, an outer shell fixedly installed on the top of the base, cleaning mechanisms arranged inside and outside the outer shell, silt auxiliary separation mechanisms arranged inside and outside the outer shell, and an access door movably installed on the front face of the outer shell. A mounting door is rotationally mounted on the left side of the shell. By arranging the silt auxiliary separation mechanism, under the action of the screening assembly, silt and dirt mixed in the cleaned flexible shellfish can be screened, the situation that silt and dirt directly fall into the collecting frame, and consequently secondary pollution is caused to the flexible shellfish is avoided, under the action of the adjusting cleaning assembly, the flexible shellfish can be cleaned, and the cleaning efficiency is improved. The flexible shellfish cleaning device has the advantages that the flexible shellfish cleaning device is simple in structure and convenient to use, water resources after cleaning can be secondarily utilized, collected silt and dirt can be uniformly treated after cleaning work is finished, the flexible shellfish can be sufficiently cleaned by the aid of the cleaning mechanism, and the flexible shellfish can be integrally conveyed and collected after cleaning is finished.

The invention relates to the field of aquaculture, in particular to a device and method for three-dimensional seedling culture and bottom sowing proliferation of buried shellfish, the device comprises a culture frame and a culture disc, the culture disc comprises side plates, placing strips, seedling attaching devices and connectors, the side plates define a rectangular frame, the top and the bottom of the rectangular frame are both open, and the placing strips are arranged on the rectangular frame. A plurality of water permeable holes are formed in the side plates, the shelving strips are arranged on the outer sides of the side plates in parallel, the seedling attachment device is supported and blocked at an opening in the bottom of the rectangular frame, the seedling attachment device is connected with the opening in the bottom through the connector, and the breeding frame comprises a three-dimensional frame and shelving strip frames. The placing strip frames are arranged in the three-dimensional frame in parallel, and the placing strips are placed on the placing strip frames. By using the device provided by the invention, the density of the fries during attachment can be adjusted, so that the density of the attached fries tends to be reasonable, and the density suitable for the growth of the fries is obtained.

The invention provides a buried shellfish harvesting device and method for bionic floating mud pressing and substrate improvement. The device comprises a shellfish roller screen separator and a bionic assembly, wherein the shellfish roller screen separator is arranged on a deck of a ship body and can separate shellfish; shellfishes and silt at the seabed are adsorbed into the shellfish roller screen separator through the shellfish collecting pipe, the shellfishes are separated and discharged through the shellfish roller screen separator, meanwhile, the silt mixed with microorganisms is screened out, and the shellfishes are discharged through the shellfish collecting channel arranged at the end of the shellfish roller screen separator. Sediment is discharged into the bionic assembly through a sediment collecting channel arranged in the shellfish roller screen separator; the bionic assembly is provided with multiple stages of box bodies, oxygenation is conducted on sediment, the proportion of water in the sediment is adjusted, and the sediment is discharged back to the seabed through a bionic discharging pipe. According to the shellfish collecting device, the seabed ecology can be effectively protected while shellfishes are collected.

The invention discloses zero-carbon concrete based on shells and a mix proportion design method thereof, and belongs to the technical field of green building materials, the mix proportion design method of the zero-carbon concrete based on the shells comprises the following steps: calculating and trying to determine the mix proportion of common concrete with a certain strength grade as a reference mix proportion; based on a life cycle analysis method, determining a reference concrete carbon emission list database, and constructing a carbon footprint accounting model; calculating and determining the shell replacement amount according to the principle that the life cycle carbon footprint is zero; and correcting the actual use amount of the replaced sandstone aggregate so as to determine the mix proportion and the strength grade of the zero-carbon concrete. The method has the advantages of being simple, objective in quantification, low in cost, easy to popularize and the like, fills the blank of the method for designing and preparing the zero-carbon building material, and is beneficial for promoting resource utilization of the shellfish waste.

The invention discloses an oyster carbon sink value evaluation method, model and equipment based on carbon sequestration amount, and a medium. The method comprises the following steps: collecting oyster breeding data in an oyster breeding process; the method comprises the following steps: respectively calculating an oyster body carbon sequestration amount, an oyster attached organism carbon sequestration amount and an oyster biological sediment carbon sequestration amount according to oyster breeding data, and summarizing the oyster body carbon sequestration amount, the oyster attached organism carbon sequestration amount and the oyster biological sediment carbon sequestration amount into a total oyster breeding carbon sink amount; and calculating the carbon sink value of the oysters according to the total carbon sink amount of the oyster culture. According to the method, a traditional culture shellfish carbon sequestration basic metering method is improved, carbon sequestration amount calculation is carried out on oyster bodies and biological sediments of attached organisms respectively, the more accurate oyster culture carbon sequestration total amount can be obtained, and the carbon sequestration income of oysters is calculated based on the carbon sequestration total amount. The method is beneficial to enriching the basic research in the field of shellfish culture carbon sink accounting, and enables the ecological service value of the shellfish culture industry to be compensated through carbon sink transaction.

The invention discloses a preparation method of a seawater shellfish single-cell suspension suitable for dynamic detection. The preparation method comprises the following steps: extracting gill filament tissues from living shellfish; washing gill filaments, and absorbing moisture; cutting the gill filament tissue into pieces; carrying out enzymolysis digestion on the gill filament tissue fragments by using an enzyme mixed solution consisting of collagenase II, hyaluronidase and deoxyribonuclease I; centrifuging and resuspending the cells; and filtering to obtain a single-cell suspension. Aiming at the condition that the shellfish tissue structure is relatively loose, cleaning liquid, enzyme liquid components, enzymolysis time, centrifugal speed and the like are optimized, and the high-quality single-cell suspension is obtained. According to the preparation method of the single-cell suspension, non-lethal sampling of seawater shellfish is conducted, the requirement for dynamic detection of shellfish traits in the industry can be met, enzymolysis is more sufficient, experiment time is shorter, operation steps are simple and convenient, obtained cells are more complete in morphology, the caking rate is extremely low, and the living cell rate is higher; and the requirements of construction of various single cell sequencing platform libraries can be fully met.

The invention relates to the technical field of deep and far sea culture, in particular to a deep and far sea self-circulation movable three-dimensional culture net cage culture system, which comprises a net cage, a culture platform, a fish culture system, a shellfish culture system and an algae culture system, the fish culture system comprises a fish culture box, the fish culture box is arranged in the culture platform, the fish culture box is of an annular hollow structure, and a culture pond is formed in the fish culture box; the algae culture system comprises an algae culture pond, and the algae culture pond is hung at the upper position in the fish culture box in the inner circumferential direction of the fish culture box; the shellfish culture system comprises a shellfish culture pond, the shellfish culture pond comprises a plurality of shellfish culture net cage units, the shellfish culture net cage units are hung on the upper portion of a fish culture box, and the fish culture system, the shellfish culture system and the algae culture system are integrated together to serve as a novel mutually-coordinated culture mode.

The utility model discloses a mud flat shellfish collecting and sludge cleaning device, and belongs to the technical field of aquatic product breeding equipment. The device comprises a collecting mechanism, a cleaning mechanism and a driving mechanism, the collecting mechanism comprises a collecting bin and a screening and filtering component, and an inlet and an outlet are formed in the collecting bin; the cleaning mechanism is connected with the driving mechanism, the driving mechanism drives the cleaning mechanism to act, the driving mechanism comprises a driving pump, the cleaning mechanism is provided with a high-pressure water cleaning part, the high-pressure water cleaning part is provided with a high-pressure water inlet and a high-pressure nozzle, and the high-pressure nozzle is communicated with the collecting bin. The harvester is simple in structure and convenient to use, harvested objects are collected through the collecting mechanism, the cleaning mechanism is driven to act through the driving mechanism, the harvested objects can be cleaned, the harvested objects can be efficiently separated under the action of the screening and filtering component, the cleaning effect is good, the harvesting selectivity is high, and the harvesting efficiency is high. Filtered silt can be directly discharged back into a water area, so that other organisms in the water area are prevented from being damaged.

The invention provides a method for nondestructive detection of contents of EPA and DHA in adductor muscles of scallops based on Raman spectroscopy, which comprises the following steps: taking a proper amount of gill filament tissues in a survival state of the scallops by using a nondestructive gill filament tissue taking method, preparing into frozen slices, performing Raman laser scanning on the slices to obtain original data, performing pretreatment such as normalization, noise reduction, baseline correction and the like, and determining the content of EPA and DHA in the adductor muscles of the scallops. Selecting a characteristic wavelength, and combining with adductor muscle lipidome data to establish a model for predicting the content of unsaturated fatty acid in adductor muscle in a cross-tissue manner by gill filament Raman data. Compared with an existing method for detecting the content of unsaturated fatty acid in scallops, the method has the advantages that the content of unsaturated fatty acid in rhabdoids of main edible parts of the scallops can be quickly, accurately and simply detected under the condition that the scallops survive, and the detection cost is greatly reduced; an efficient and simple technical means is provided for breeding of shellfish quality characters, and popularization and promotion in comprehensive evaluation and genetic improvement work of aquatic germplasm are facilitated.

The utility model discloses a milk shellfish bagging pretreatment device which comprises a first treatment mechanism and a second treatment mechanism, the first treatment mechanism and the second treatment mechanism are sequentially and fixedly connected and are fixedly and obliquely fixed to a supporting frame, and the output end of the second treatment mechanism is fixedly connected with a conveying guide pipe. The first treatment mechanism can conduct vibration pretreatment on the milk shells, the second treatment mechanism can slow down the conveying speed of the milk shells, through sequential arrangement of the first treatment mechanism and the second treatment mechanism, the milk shell powder can be shaken off, the milk shell powder mixed in the milk shells is reduced, meanwhile, the conveying speed of the milk shells can be buffered, and the conveying speed of the milk shells is improved. Milk shell powder is prevented from being raised, and the environment quality of a production workshop is guaranteed.

The invention discloses an array type shellfish culture structure motion response modeling analysis method, which comprises the following steps of: firstly, aiming at the complex structure of array type shellfish culture equipment, constructing a finite element numerical model of the shellfish culture equipment according to a rigid body kinematics principle and a concentrated quality method; secondly, performing hydrodynamic load calculation on the floating ring and the breeding cage by utilizing a Morison formula; and finally, solving the constructed motion equation through an implicit solver so as to obtain the motion response of the shellfish culture structure under the action of waves. According to the method, a coupling analysis method in the prior art that the upper floating body and the breeding cage serve as two independent structures is improved, and modeling and motion response analysis of the complex structure of the breeding cage are achieved.

The invention discloses a method for directionally culturing diatom by using culture tail water and application, and belongs to the crossing field of aquaculture and wastewater treatment.The method for directionally culturing diatom in the culture tail water comprises the following steps: S1, precipitation: discharging the culture tail water into a precipitation tank to precipitate silt and large particles; s2, sterilization and algae removal: ultraviolet rays are adopted to irradiate the culture tail water to kill bacteria and original algae in the culture tail water; s3, adjusting the nutrition structure: adjusting the total salinity of the culture tail water to 20-30% o, the silicate content to 500-1000 [mu] mol / L, the phosphate content to 0.6-0.9 mg / L and the ammonium salt content to 4-6 mg / L; s4, algae species and bacteria inoculation and culture: diatom and diatom symbiotic bacteria are inoculated into culture tail water. By using the method provided by the invention, the directional regulation and control of the microalgae community in the culture tail water can be realized, and the removal rate of nutritive salts in the culture tail water and the resource recovery rate are greatly improved. Meanwhile, by-product shellfish organisms can appear on the market through subsequent culture, the economic benefit is improved, and the purification cost is reduced.

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

The utility model relates to the technical field of net cages, and discloses a mariculture net cage convenient to clean, which comprises a net cage, a buoy is fixedly mounted on the surface of the net cage, a support plate is fixedly mounted in the net cage, and a driving motor is fixedly mounted at the top of the support plate. The output end of the driving motor rotationally penetrates through the supporting plate and extends to the bottom of the supporting plate, an output shaft is fixedly installed at the output end of the driving motor, an outer scraper is fixedly installed on the surface of the lower end of the output shaft, and an inner scraper is fixedly installed on the surface of the upper end of the output shaft. According to the shellfish net cage, due to the arrangement of the inner scraping plate and the outer scraping plate, the net cage can be cleaned conveniently, then shellfish is prevented from being attached to the net cage, circulation of water in the net cage is guaranteed, breeding is facilitated, due to the arrangement of the outer scraping plate, external fish schools can be driven conveniently, and the shellfish net cage is convenient to use. Therefore, fish schools in the net cage are prevented from being interfered or competing for nutrients, and the culture effect is improved.

The utility model discloses a mud flat shellfish harvesting double-layer shovel device and shellfish harvesting equipment thereof. The mud flat shellfish harvesting double-layer shovel device comprises a supporting frame body, a harvesting double-layer shovel and a double-layer shovel driving mechanism. The harvesting double-layer shovel is rotatably installed on the supporting frame body and comprises a first harvesting shovel body and a second harvesting shovel body, the first harvesting shovel body is used for shoveling surface-layer substrates, the second harvesting shovel body is used for harvesting second-layer substrates and shellfish, and a plurality of screen holes are formed in the surface of the second harvesting shovel body; the double-layer shovel driving mechanism is used for driving the harvesting double-layer shovel to vibrate so as to complete shellfish harvesting; compared with an existing single-layer shovel, the harvesting double-layer shovel has the advantages that after the first harvesting shovel in the harvesting double-layer shovel shovels the surface mud flat substrate, the harvesting resistance of the second harvesting shovel can be reduced, in addition, the thickness of the mud flat substrate harvested by the second harvesting shovel is small, screening of mactra veneriformis is facilitated, the mactra veneriformis screening efficiency is improved, and the working efficiency of the mactra veneriformis is improved. Therefore, the overall harvesting efficiency can be improved.