6results about How to "Evenly seeded" patented technology

The invention provides a CFD-EDM-based pulse jet power-assisted on-film precision seeding device and a design method, the CFD-EDM-based pulse jet power-assisted on-film precision seeding device comprises a hole making device and a seed sowing device which are arranged in parallel, the hole making device comprises a bottom plate, a motor fixed on the bottom plate through a bracket, a crank fixedly connected with the motor and a first connecting rod hinged with the crank, the device further comprises a second connecting rod, a third connecting rod and a fourth connecting rod. The tail end of the fourth connecting rod is connected with a guide rod. A drill bit is fixedly connected to the guide rod; the seed-metering device comprises a shell, a seed-metering wheel and a blocking wheel, the seed-metering wheel is rotationally connected with the shell, one side of the seed-metering wheel is attached to the inner wall of the shell, and a plurality of nest holes are formed in the seed-metering wheel; a seeding opening is formed in the bottom of the shell, and a cycloid guide rail and an air injection pump are arranged at the seeding opening. According to the invention, the cooperative working mode of the hole making device and the seed metering device is comprehensively considered, and the seed metering success rate of seeds with small and medium particle sizes can be obviously improved through simulation optimization design, so that the seed filling is stable, and the seed metering is uniform.

The seed metering device comprises a seed metering box, a horizontally arranged transmission shaft is mounted on the seed metering box, a plurality of seed metering discs are mounted on the transmission shaft side by side, and each seed metering disc can synchronously rotate along with the transmission shaft. The seed metering device has the positive effects that the plurality of seed metering discs which are arranged side by side are arranged on the transmission shaft of the seed metering box, the seed metering push blocks which are arranged circumferentially are arranged on the periphery of each seed metering disc, and the width of each seed metering push block is smaller than that of each seed metering disc; a relatively closed space cannot be formed between the seed-metering push blocks and the seed-metering tongues, a certain distance exists between the seed-metering push blocks on the adjacent seed-metering discs, and when the seed-metering push blocks rotate to uniformly push out seeds on the seed-metering tongues, the seeds can be prevented from being extruded and damaged by the closed space, the activity and the germination rate of the seeds are ensured, and uniform seed metering is realized; therefore, high-quality seeding operation is completed.

The application discloses a microfluidic chip for preparing high-flux tumor organoids and a preparation method and application thereof. The microfluidic chip comprises a top layer and a matched bottom layer connected with the top layer; the top layer contains four hollow areas in the shape of right-angle sectors, and forms liquid storage areas after being connected with the bottom layer; four cell culture areas and four liquid exchange buffer areas are arranged in the areas of the bottom layer corresponding to the hollow areas of the top layer, and one cell culture area and one liquid exchange buffer area form a right-angle sector; the cell culture area is provided with a plurality of small chambers; and the liquid exchange buffer area is connected with the center. The microfluidic chip is provided with the liquid exchange buffer area, which greatly reduces the growth interference and loss of cells during liquid exchange, thereby being beneficial to the formation of uniform tumor organoids and keeping the tumor organoids in situ, facilitating continuous observation; and the top-open structure design is adopted, which is convenient for uniform implantation and dispersion of tumor cells and convenient for recovery of the tumor organoids.

The utility model relates to ecological restoration device technical field especially, more particularly to a kind of adjustable seed reseeding device of grassland ecological restoration.The utility model provides a kind of adjustable seed reseeding device of grassland ecological restoration, including support frame, non-slip wheel, motor, fixed block and fixed column, multiple non-slip wheels are rotatably connected in the rectangular array in support frame bottom, motor is fixedly connected in support frame right side, fixed block is fixedly connected in support frame left side, the output shaft end of fixed block and motor is rotatably connected, fixed column is fixedly connected in support frame left side.The utility model is through the clamping cooperation structure of limiting rod and fixed block, is combined with guide rod and knob locking mechanism, so that seed box can be conveniently installed on motor output shaft, and its position can be adjusted by knob, to realize the flexible adjustment of sowing row distance, improve the stability and operation convenience of overall structure, reduce manual intervention and operating cost.

The utility model provides a broad bean planting seed-metering device which comprises a seed-metering box and a seed-metering disc, a circular accommodating chamber is arranged in the seed-metering box, the seed-metering disc is rotatably mounted at the bottom of the accommodating chamber through a rotating shaft arranged in the middle and a bearing, and a motor is mounted at the top of the seed-metering box and is in transmission connection with the rotating shaft of the seed-metering disc; annularly distributed seed storage holes are uniformly formed in the edge of the seed metering plate; a main seed scraping plate for dividing the accommodating cavity into a left cavity and a right cavity is arranged on the inner wall of the seed metering box, two pre-seed scraping plates are arranged on the side wall of the left cavity, and seed metering holes are formed in the bottom of the right cavity. And the bottoms of the seed metering holes are connected with seed metering pipes. Through the arrangement of the two pre-seed scraping plates and the main seed scraping plate, seeds on the seed storage holes are scraped for multiple times, so that the seeds can conveniently fall into the seed storage holes with vacancies, and the situation that the seeds cannot fall into the seed storage holes due to accumulation, extrusion and mutual support when the seeds are more is prevented, so that the vacancies of the seeds are prevented; therefore, the seeds are uniformly discharged.

The invention discloses a double-line wide-width seeding device, comprising a housing, a seeding wheel group, a front stopper, a first adjustment arc plate, a second adjustment arc plate, a seeding tube, a first switch plug plate and a second switch plug plate, wherein an inner partition separates the inner cavity of the housing into two seeding cavities, and the front stopper is installed at the front of the top opening of the housing; the seeding wheel group comprises a first seeding wheel and a second seeding wheel which are coaxially arranged identically, and seeding plates are evenly distributed on the circumference of the outer cylindrical wall of the first seeding wheel; the seeding wheel group can be rotatably installed in an arc slot hole installed at the upper part of the housing, and the first adjustment arc plate and the second adjustment arc plate are respectively arranged at the lower part of the first seeding wheel and the second seeding wheel, and can adjust the seeding gap; the first switch plug plate and the second switch plug plate are arranged in a sliding groove opened at the top of the housing; and the two seeding cavities are respectively connected to independent seeding tubes. The double-line wide-width seeding device and the working method thereof of the invention have uniform seeding and are suitable for wide-width uniform sowing and planting.