31 results about "Trapezia" patented technology

The utility model relates to the technical field of juicers, and discloses a multi-section type spiral juicer which comprises a supporting frame, an extrusion juicing mechanism is arranged at the upper end of the supporting frame and comprises a bottom containing shell, the middle of the inner wall of the front end of the bottom containing shell is rotationally connected with a trapezoidal shaft, and the trapezoidal shaft is arranged in the middle of the inner wall of the front end of the bottom containing shell. An auger blade is fixedly connected to the outer wall of the trapezoidal shaft, a crushing mechanism is arranged on the front portion of the upper end of the squeezing and juicing mechanism, and the crushing mechanism comprises a middle containing shell. According to the multifunctional juicer, the dicing mechanism, the crushing mechanism and the squeezing and juicing mechanism can be independently disassembled and assembled, a user can splice proper mechanisms according to requirements, the modularized detachable design enables all parts to be cleaned more easily, the user can clean all the parts in a targeted mode, and the practicability is high. The accumulation of pomace or bacteria is avoided, so that the sanitation and the service life of the equipment are better maintained.

The invention relates to the technical field of insect catching devices, in particular to an electric shock type trapping device capable of preventing insects from hanging a net. The invention discloses an anti-net-hanging electric shock type trapping device for flying insects, the trapping device comprises an inducing device (6), a supporting device (5), an electric net (7) and an insect collecting device (2), the supporting device (5) is a supporting plate or a supporting frame, and the supporting device (5) is an inverted isosceles trapezoid; the power grid (7) is formed by winding a wire on the outer side of the supporting device or winding the wire through a hole in the supporting device. A certain angle is formed between the wire and the horizontal plane. The trapping device is convenient to assemble and can be disassembled for transportation; insects are not easy to hang on the power grid, and the long-term insect trapping effect is not reduced; the angle and the distance of the power grid can be adjusted according to different insects, and a better trapping effect is achieved.

The utility model discloses a small assembly type proliferation reef which comprises a bottom plate, and a plurality of proliferation frames are detachably installed on the bottom plate. The proliferation frame is reasonable in structure and novel in design, when the proliferation frame is spliced, the insertion blocks are inserted into the corresponding insertion grooves, due to the trapezoidal structures of the insertion grooves, the first side plates and the second side plates are spliced, after the proliferation frame is spliced, the proliferation frame is fixed to the bottom plate, and when the proliferation frame is installed on the bottom plate, the insertion blocks are inserted into the insertion grooves. A pair of mounting blocks at the lower end of a proliferation frame are inserted into the mounting grooves, finally, the proliferation frame is fixed, and when the proliferation frame is fixed to the bottom plate, the lead screws are spirally mounted in the threaded holes, the mounting blocks are fixed into the mounting grooves, so that the proliferation frame is fixed. And organisms in the proliferation frame can be conveniently taken out.

This invention belongs to the field of coastal ecological restoration and marine aquaculture technology. Specifically, it is an artificial composite reef structure, including a base. The base is a trapezoidal frame structure with multiple frame columns inside. The base columns are fixedly connected to the surface of the base, and the base columns are fixedly connected to the sleeves. The sleeves are slidably connected to the telescopic columns, and the telescopic columns are threadedly connected to the surface of the telescopic columns. The other end of the telescopic columns passes through the sleeves and the base columns, making a slidable connection. By combining the frame-type base with upwelling reefs and bird-standing stakes, a two- or three-layer artificial composite reef structure is formed, creating a multifunctional marine biological reef environment. This overcomes the problems of the single function and limited environment of ordinary biological reefs. It not only has a wider range of applicability, but also organically combines the two- or three-layer structure to create a multifunctional marine habitat, forming a three-in-one marine ecosystem integrating sea, land, and air.

The utility model relates to a trapezoidal tap interdigital filter, and particularly relates to the technical field of filters, the trapezoidal tap interdigital filter comprises a shell, the top of the shell is connected with a cover plate through a bolt, the shell is matched with the cover plate, a substrate is arranged in the middle between the shell and the cover plate, one end of the shell is provided with an input interface, and the other end of the shell is provided with an output interface. An input interface is formed in the shell, an output interface is formed in the side, away from the input interface, of the shell, the input interface and the output interface are located on the same straight line, resonators are arranged in the middle of the substrate, ground holes are formed in the ends of the resonators, and the input interface and the output interface are connected with the resonators on the two sides through tap structures. The tap structure comprises an external connection part, a transition part and a connection part. The mode of optimizing the tap structure is utilized to ensure that key performance indexes such as frequency selectivity, insertion loss, retardation inhibition and the like meet high-standard requirements, and the cost is reduced.

The invention provides a compound ecological river section structure and an in-situ remediation construction method thereof, and relates to the technical field of water ecological remediation. The method comprises the steps that a hard lining of a river channel to be repaired is removed, and a compound permeable trapezoidal section is reconstructed; sequentially laying a bottom gravel layer, a middle porous filter material layer and a surface pebble layer at the bottom of the central main riverbed, and planting aquatic plants to form a multi-stage purification substrate; a permeable nail dam is built at the junction to disperse lateral scouring force, and a fish scale dam is built in the central main riverbed to produce falling fall so as to cooperate with a substrate to improve the purification efficiency; inner-layer geotechnical cloth, a slope protection gravel layer and outer-layer geogrids are sequentially laid on the surface of the lateral slope area to form a flexible anti-scouring base layer, prefabricated ecological building blocks are assembled on the outer side of the base layer, and indigenous plants are planted on the outer side of the base layer to form a composite ecological revetment; and a vegetation buffer zone is constructed at the top of the composite ecological revetment, and a front filtering barrier is formed to intercept non-point source pollution. The problems of river habitat blocking and revetment instability are solved.

The application discloses a kind of pinus massoniana planting protection frame in the technical field of forestry protection, including body, sliding rod is slidably connected in the body along vertical direction, rotating rod is hingedly connected to the top of sliding rod, and ball hinge head is arranged between rotating rod and sliding rod;Several screws are arranged on the outer wall of sliding rod, one end of screw passes through sliding rod, and screw is in abutment with ball hinge head;The cavity in the form of trapezoid is opened in the body, the bottom of sliding rod is fixedly connected with expansion pipe, the expansion pipe is formed by several expansion strips, the expansion pipe is located in the cavity, and the end of expansion pipe away from sliding rod is in abutment with the body;Several openings are arranged on the outer wall of the body, the opening is communicated with the cavity, when sliding rod moves to the lowest point, expansion strip extends from the opening;Rotating rod is rotated on sliding rod through ball hinge head, and it is convenient to support and protect pinus massoniana planted in different terrain;The cooperation of expansion pipe and body provides development space for the growth of pinus massoniana, and it is convenient to continue to protect pinus massoniana by protection frame.

The invention belongs to the field of gas field development, and particularly relates to a novel method for predicting flowing bottomhole pressure of a multi-section fractured horizontal well based on three-phase seepage. In the method, in order to solve the problem that a traditional flow-back model cannot accurately describe the dynamic influence of gas release and expansion on flow-back due to simplification of a multiphase seepage process, the well bore oil nozzle throttling effect and a fracture network three-phase seepage equation are combined, and the well bottom flowing pressure change and the three-phase saturation change are synchronously solved by adopting a dynamic iterative algorithm; and quality conservation is ensured by using an improved trapezoidal integral method, and full-life-cycle dynamic prediction from flowback of the fracturing fluid to long-term production is realized. The method has theoretical rationality and practical production application value in practical application of gas reservoir extraction.

The invention discloses an intensive breeding device of procambarus clarkii and an intensive artificial breeding method of the procambarus clarkii, and relates to the technical field of aquaculture. The intensive breeding device comprises a parent shrimp inhabiting and mating nest structure and an egg-carrying shrimp hatching and larva breeding nest structure which are arranged in a parent shrimp breeding pond and a hatching and larva breeding pond respectively. The parent shrimp inhabiting and mating nest structure comprises an inhabiting frame and an inner nest body, the inhabiting frame is a right trapezoid frame body, and multiple layers of partition plates are arranged in the middle of the right trapezoid frame body; the inner nest body is a right trapezoid body, and a plurality of inhabiting nests are formed in the inner nest body; an egg-carrying shrimp hatching and larva breeding nest structure comprises a hatching and breeding frame, hatching nest units and side nets. According to the device, the space utilization rate of the parent shrimps and the larvae in the parent shrimp breeding pond and the hatching and larva breeding pond is effectively increased, and the bearing number and the breeding density of the parent shrimps and the larvae in unit water are greatly increased. The invention further discloses an intensive artificial breeding method, intensive and batch production of egg-carrying shrimps and juvenile shrimps of the procambarus clarkii is achieved, and the productivity can be improved by more than 5 times.

The utility model discloses a special protection device for submarine pipeline laying, which comprises a protection block, the lower surface of the protection block is provided with a trapezoidal groove, the lower surface of the protection block is symmetrically provided with fixing plates, and the upper surfaces of the fixing plates are fixedly connected with a fixing block. According to the special protection device for laying the submarine pipeline, through the arrangement of the protection blocks, the planting grooves and the seaweed seed bags, the trapezoidal grooves can protect the submarine pipeline, the protection blocks achieve the supporting and protecting purposes, falling objects are prevented from impacting and damaging the submarine pipeline, and the throwing device lifts the protection blocks through hanging rings connected with the fixing blocks on the fixing plates to sink into the seabed; in the process, the resistance of seawater to the protection blocks and the trapezoidal grooves can be reduced through gaps, the submarine pipeline can be hidden after the sea grass seed bags in the planting grooves grow into sea grass, meanwhile, the growing sea grass can reduce the ocean current speed to help sediment deposition, and the device can utilize the porous net plate to kill water flow and dissipate water flow energy; the method has a good protection effect and is eco-friendly.

The utility model discloses a water conservancy water surface floating object fishing device relates to water surface floating object fishing technical field, including fishing outer pole, fishing inner pole, fishing net bag, installation ring is equipped with the installation component for fixing fishing net bag on the installation ring, the installation ring bottom is equipped with support component, the fishing inner pole end portion detachably installed with support rod, and installation component includes outer ring, trapezoidal extrusion ring and the annular installation slot of setting on the installation ring upper surface, this water conservancy water surface floating object fishing device, through the cooperation of installation component and support component's use, is convenient for the replacement of fishing net bag, and the fishing net bag is extruded by outer ring and trapezoidal extrusion ring after replacement, is limited simultaneously by the conical protrusion of taper block and trapezoidal extrusion ring side, and the annular installation firmness is very strong, will not appear the net phenomenon, and the use of inner ring and outer ring can unfold fishing net bag inner chamber, in the fishing process, because fishing net bag is in the unfolded state, can fish more garbage once, and when also will be more smoothly when turning over and dumping water surface garbage.

The application belongs to the technical field of dehumidifiers, and particularly relates to a dehumidifier and a dehumidification method. In the prior art, the dehumidifier is prone to being knocked over when used at home, has a single function, cannot utilize condensed liquid, and the copper tube aluminum foil evaporator is prone to dust accumulation. The present application provides the following scheme, which comprises a shell, flip covers rotatably connected to the top of the shell, a plastic fish tank arranged on one side of the shell, an adsorption structure arranged in the shell and used for tightly adsorbing the shell to the ground and a table top, and a fixing structure arranged on one side of the shell. In the application, the flip covers can not only close the shell to prevent dust from falling on the copper tube aluminum foil evaporator when the dehumidifier is not used, but also drive the sliding plate to move upward to tightly adsorb the shell to the ground or the table top when the flip covers are opened. When the flip covers drive the sliding plate to move upward, the plastic fish tank and the shell can be tightly fixed through the cooperation of the trapezoidal pin and the T-shaped column.

The invention relates to a cleaning device for cleaning green algae in a water channel of a secondary sedimentation tank, and belongs to the technical field of secondary sedimentation tanks, the cleaning device comprises a moving trolley, cleaning assemblies are arranged on the left side and the right side of the front of the moving trolley, each cleaning assembly comprises a trapezoidal sliding groove formed in the surface of the moving trolley, and trapezoidal blocks are slidably mounted on the inner walls of the trapezoidal sliding grooves; and longitudinal moving opening plates are fixedly installed on the surfaces of the trapezoid blocks, the bottom faces of the two longitudinal moving opening plates are provided with jacking assemblies used for jacking, and adjusting hole blocks are installed in the inner walls of the longitudinal moving opening plates in an embedded and sliding mode. According to the device, green algae in the water channel of the secondary sedimentation tank can be cleaned, so that the cleaned green algae and float sludge are brought to the next treatment unit by water flow, the problem that potential safety hazards possibly exist when personnel enter the inner side for cleaning is solved, and the labor intensity of operation personnel of a sewage plant is relieved.

The application provides a new type of fish pond slope protection structure, which comprises a dam body, the dam body is composed of an original soil layer, a sand cushion layer, a mesh cloth layer, a solidified soil layer and a grass cushion layer, the longitudinal section of the dam body is trapezoidal, a step is arranged on the inclined surface of the dam body, a drainage ditch is arranged at the lower base angle of the dam body, the sand cushion layer is covered on the original soil layer, the mesh cloth layer is covered on the sand cushion layer, the solidified soil layer is covered on the mesh cloth layer, and the grass cushion layer is laid on the solidified soil layer and located around the step. The step arranged on the dam body is convenient for the breeder to observe the fish pond and feed the aquatic products; the grass cushion layer plays a role in preventing water and soil loss through vegetation and soil in rainy days, and the increased vegetation makes the whole protection dike more beautiful; the anti-skid and smooth mesh cloth layer is beneficial to the spraying of the solidified soil, so that the solidified soil layer is formed on the mesh cloth layer.

A marine trap for catching crab, shrimp, crawfish, lobster, and other forms of marine life. The trap is a trapezoidal prism design. This concaved design permits nesting for increased volume in the same area for both in storage and on a boat deck. The right corner shape conserves space by eliminating wasted deck space caused by round marine traps.

The invention provides a coal mining separation space drilling device and method, and relates to the technical field of coal rock drilling. The drill rod comprises a drill rod body, a plurality of sleeve shells which are arranged together in a sleeved mode are arranged in the drill rod body, the inner diameters of all the sleeve shells are sequentially reduced from outside to inside, trapezoidal blocks distributed in the circumferential direction and check blocks distributed in the circumferential direction are arranged between every two adjacent sleeve shells, and the check blocks are used for extruding the adjacent trapezoidal blocks. A plurality of elastic pieces are fixedly connected between every two adjacent sleeve shells. Drilling rock cores are collected section by section through the multiple layers of sleeve shells, in the process of collecting the rock cores section by section, the openings of all the sleeve shells deform in sequence, the rock cores are clamped, so that it is guaranteed that the form of the rock cores is stable, the probability that the rock cores change due to the fact that gaps exist in the separation space is reduced, and the rock core separation efficiency is improved. Therefore, the accuracy of a sampling result is guaranteed, the accuracy of judgment on separation space distribution is further guaranteed, and subsequent normal mining of a coal mine is guaranteed.

The utility model discloses an inland ship lock niche type bollard fabricated formwork, and relates to the technical field of inland ship lock and avionics hub construction. Comprising an inner embedded formwork and an outer vertical formwork which are fixedly connected. The embedded template comprises a side die, a bottom die and a niche type bollard embedded part which are connected from top to bottom; the side mold comprises a left side mold plate, a front vertical side mold plate and a right side mold plate which are sequentially connected from left to right, the left side mold plate, the front vertical side mold plate and the right side mold plate are all special-shaped mold plates vertically connected with the plate surface of the outer vertical mold plate, and after splicing, the whole side mold is of a trapezoidal table structure with the lower inclined upper surface and the horizontal bottom surface; the bottom die comprises a left bottom die body, a middle bottom die body and a right bottom die body which are sequentially connected from left to right, the bottom die bodies are sequentially connected to the lower portions of the corresponding side die bodies and are perpendicular to the surface of the outer vertical die plate, and the lower portion of the middle bottom die body is connected with a niche type bollard embedded part. The niche structure solves the problems that a niche structure is narrow in internal space and large in construction difficulty, is easy and convenient to erect and dismantle and can be used in a turnover mode, and construction cost is reduced.

The present application relates to the field of drainage outlet structure, and particularly relates to a combined drainage outlet. The combined drainage outlet comprises a submerged dike and a water outlet buried in the submerged dike; the submerged dike has a trapezoidal cross section, and the top elevation is above the mean sea level; a first prefabricated drainage pipe extends from the coast to the submerged dike, and drains water through the water outlet. The submerged dike comprises a prefabricated tee joint, a second prefabricated drainage pipe connected to the prefabricated tee joint, and a third prefabricated drainage pipe connected to the second prefabricated drainage pipe, and the first prefabricated drainage pipe is connected to the prefabricated tee joint. The present application solves the problems of high cofferdam cost, easy impact of dredging and siltation after completion, landscape depression of the beach surface, and personnel safety risk.

The invention belongs to the technical field of tight gas reservoir development, and particularly relates to a tight gas productivity prediction method considering complex fracture morphology and stress sensitivity, comprising the following steps: step 1, establishing a physical model of a tight gas reservoir and providing a basic hypothesis; step 2, establishing a seepage model of a tight sandstone natural fracture system and a matrix system; and step 3, establishing and solving a compact sandstone productivity model under the complex main seam form. According to the method provided by the invention, the influence of the complex crack form, stress sensitivity, gas slip effect, inter-crack interference and the like of the main crack on the productivity can be considered at the same time. In addition, the method also has a fast calculation speed. The hydraulic fracture is considered as a combination of countless small trapezoids, the form can be changed at will according to microseismic interpretation data, the fracture can deflect in any direction, the flow conductivity of the fracture is decreased progressively from a near well to a far well, and the method is more practical.

The utility model relates to the technical field of filtering devices, and discloses a filtering device for purifying ganoderma lucidum spore powder, which comprises a filtering box, the top of the filtering box is communicated with a feed port, the bottom of the filtering box is fixedly provided with a speed reducing motor, and the output end of the speed reducing motor penetrates into the filtering box and is fixedly connected with a rotating plate. A sliding rod is fixedly connected to the top of the rotating plate, a sliding sleeve is slidably connected to the surface of the sliding rod, a toothed plate is fixedly connected to the top of the sliding sleeve, a trapezoidal sliding block is fixedly connected to the top of the toothed plate, and a trapezoidal sliding groove plate is slidably connected to the surface of the trapezoidal sliding block. According to the ganoderma lucidum spore powder filtering device, through mutual cooperation of the gear motor, the filtering plate, the stirring plate and other structures, ganoderma lucidum spore powder containing spore oil and sticky blocks can be scattered, the ganoderma lucidum spore powder sticky blocks are prevented from being accumulated at the top of the filtering plate, secondary scattering by workers is not needed, and the filtering effect and the working efficiency are improved.

This invention relates to the field of ecological slug control technology and discloses an adjustable-release rate vertical pokeweed extract ecological slug control module, including a support plate. A storage cylinder is fixedly connected to the top of the support plate. A trapezoidal lead screw is threadedly connected to the top of the storage cylinder. A rotating handle is fixedly connected to the top of the trapezoidal lead screw. A mounting block is fixedly connected to the bottom of the trapezoidal lead screw. A frustum-shaped block is fixedly connected to the bottom of the mounting block. A cylinder is fixedly connected to the top of the mounting block. A hollow shaft is rotatably connected to the top of the storage cylinder. The outer wall of the trapezoidal lead screw is disposed within the hollow shaft, and a groove is formed at the bottom of the hollow shaft. The outer wall of the cylinder is slidably connected within the groove. By rotating the rotating handle, the trapezoidal lead screw rotates, moving up and down along the top of the storage cylinder, causing the mounting block and the frustum-shaped block to move synchronously. The gap between the discharge pipe and the frustum-shaped block changes accordingly, thereby controlling the release rate of the vertical pokeweed extract and improving the slug control effect.

The present application provides a kind of coal mining delamination space drilling device and method, it is related to coal rock drilling technology field.The present application includes drill pipe, several sleeve shells are arranged in the drill pipe, the inner diameter of all sleeve shells gradually decreases from outside to inside, adjacent two sleeve shells are provided with circumferentially distributed trapezoidal blocks and circumferentially distributed stop blocks, the stop block is used to extrude adjacent trapezoidal block, and several elastic members are fixedly connected between adjacent two sleeve shells.The present application collects the rock core drilled by multilayer sleeve shell in section, in the process of segmented collection of rock core, the opening of all sleeve shells is sequentially deformed, the rock core is clamped, to ensure the stability of the form of rock core, reduce the probability of change of rock core due to the existence of gap in delamination space, to ensure the accuracy of sampling result, to ensure the accuracy of delamination space distribution judgment, to ensure the normal mining of coal mine subsequently.

The present application belongs to the field of gas field development, and particularly relates to a new method for predicting bottom hole flowing pressure of multi-stage fractured horizontal well based on three-phase percolation. In the present application, in order to solve the problem that the traditional flowback model cannot accurately describe the influence of gas release and expansion on flowback dynamic due to the simplification of the multi-phase percolation process, the wellbore choke effect is combined with the three-phase percolation equation of the fracture network, the dynamic iteration algorithm is used to synchronously solve the change of bottom hole flowing pressure and the change of three-phase saturation, the improved trapezoidal integration method is used to ensure the mass conservation, and the whole life cycle dynamic prediction from fracturing fluid flowback to long-term production is realized. The method has theoretical rationality and practical production application value in the actual application of gas reservoir stimulation.

The invention relates to the technical field of petroleum engineering oil field underground fishing tools, discloses a clamping type oil gas shaft fishing tool suitable for a cylindrical fish, solves the problem of poor cutting effect, and comprises a clamp shell, a fish clamping device is arranged in the clamp shell, and a grooving device is arranged at the lower end of the fish clamping device; a salvage sleeve is arranged in the clamp shell; the fish clamping device comprises a driving column, a fixing and clamping back plate is welded to the bottom of the driving column, a tooth pushing back plate is welded to the bottom of the fixing and clamping back plate, and a clamping fixture is arranged on the fixing and clamping back plate; the grooving device comprises a grooving device reset spring, grooving device trapezoid cutting teeth and a grooving device tooth pushing sliding block. During grooving operation, the driving column drives the tooth pushing back plate to provide continuous and reliable rear support for the grooving device, cutting teeth are pushed out in cooperation with the trapezoidal guide structure, the cutting teeth can be effectively prevented from moving backwards, and it is guaranteed that the cutting process is conducted stably.

The application discloses a waterwheel type flowing force triboelectric adsorption water purification device, which comprises a trapezoidal supporting shell, a first semicircular mounting groove is formed in the upper surface of the trapezoidal supporting shell, a water outlet pipe is arranged on the trapezoidal supporting shell, the water outlet pipe is communicated with the first semicircular mounting groove, a semicylindrical cover is hingedly arranged on the trapezoidal supporting shell, a second semicircular mounting groove is formed in the semicylindrical cover, a water inlet pipe is arranged on the semicylindrical cover, the water inlet pipe is communicated with the second semicircular mounting groove, and a waterwheel assembly for purifying water is detachably connected in the trapezoidal supporting shell. The application solves the problem that the small water purification device adopting the filter membrane for purifying water needs to overcome the resistance of a pretreatment filter element, so that a high-pressure pump is installed, and the energy consumption of the water purification device is high.

The application discloses a kind of reduce the loss of frozen seafood vacuum packaging and use the device of removing thorn, it is related to seafood removing thorn technical field, the device includes box, removing thorn subassembly, drive assembly, the box one side is open and has feed inlet, the opposite side wall of the box is connected with rotary plate by bearing, two The rotary plate between fixedly connected with knife net, the inner wall of the box is fixedly connected with fixed frame;The removing thorn subassembly is arranged between two rotary plates, for improving the removing thorn effect of device;The drive assembly is arranged on fixed frame, for driving removing thorn subassembly to rotate and remove thorn.The application is rotated by motor drive knife net, reciprocating motion is coordinated trapezoidal blade and arc blade, realize the automatic removal of shrimp crab and other seafood surface sharp thorn, change the problem of low efficiency of traditional manual removing thorn, can match modern packaging line speed, avoid the production capacity waste caused by labor shortage in fishing season.

This utility model provides a large yellow croaker farming device, solving the problem of complex connection structures in current net cages. It also includes: a notch, trapezoidal in shape, located on the outer edge of the buoyancy plate; a connecting hole on the inner wall of the notch; a connecting block, hourglass-shaped, for engaging with the notch; a groove on the outer wall of the connecting block; an elastic positioning post on the connecting block for engaging with the connecting hole; and a handle on the top surface of the connecting block. The connecting block can engage with two notches respectively, and then the elastic positioning post is inserted into the connecting hole to connect two adjacent buoyancy plates, thereby achieving the connection between net cages. The structure is simple and the connection is convenient.

The utility model belongs to the technical field of water circulation filtration, and particularly relates to a water circulation filtration device for aquaculture of fish fries, which comprises an aquaculture box. A groove is formed in one side of the breeding box; a filter box is slidably connected to the interior of the groove; a first filter layer, a second filter layer and a third filter layer are arranged in the filter box; a trapezoidal filter plate is fixedly connected to the interior of the breeding box; in order to overcome the defects in the prior art, the water circulation filtering device solves the problems that in long-time water circulation filtering of the water circulation filtering device, a large number of impurities can be accumulated on the filtering device, a filtering net or a filtering medium can be blocked due to accumulation of the impurities, the resistance of water flow passing through the filtering device is increased, and the filtering effect is poor. When the impurities are accumulated to a certain degree, part of the impurities can not be effectively intercepted and directly penetrate through the filtering device to enter the aquaculture water body, and the water quality is influenced.