8results about How to "Precise volume control" patented technology

The present application relates to the technical field of filling coal mining, and particularly relates to a filling coal mining slurry bleeding rate testing and sample preparation test device and test method. The device comprises: a constraint cylinder, the side wall of which is a hollow structure; a flexible bleeding unit, which is attached to the inner side wall of the constraint cylinder; an inner lining structure, which is attached to the inner side wall of the flexible bleeding unit, and the inner lining structure is provided with a plurality of support platforms along the height direction; and a plurality of sample molds, which are arranged on the support platforms. The present application can simultaneously meet the needs of filling coal mining slurry bleeding rate testing and filling coal mining slurry standard sample preparation, effectively avoid the problems of sample height reduction and size not meeting the standards caused by water loss, accurately control the slurry form, ensure the formation of standard samples, and truly reflect the actual mechanical properties of the filling body. The sample height change before and after the slurry bleeding can be recorded in real time, and the volume of the slurry in the actual filling process can be quickly calculated.

The utility model relates to the technical field of semen quality analysis, in particular to a concentric circle sperm quality analyzer sample pretreatment structure which comprises a monitor, the bottom end of the inner side of the monitor is fixedly connected with a stepping motor, and the output end of the stepping motor is fixedly connected with a connecting disc. A first circular ring, a second circular ring and a third circular ring are fixedly connected to the top of the connecting disc, an insertion hole is formed in the first circular ring, a sampling cup is slidably connected to the insertion hole, a fixing cylinder is fixedly connected to the bottom end of the inner side of the insertion hole, and placement grooves are symmetrically formed in the outer side of the fixing cylinder; the concentric circle sperm quality analyzer sample pretreatment structure comprises a fixing cylinder, a placing groove is formed in the fixing cylinder, a mounting disc is fixedly connected to the inner side of the fixing cylinder, a connecting groove is formed in the mounting disc, and the interior of the placing groove is communicated with the interior of the connecting groove. And sampling cups with different sizes can be quickly clamped and fixed.

The utility model provides an automatic titration device for a microcalorimeter. The automatic titration device comprises a fixed shell, a plurality of micro servo motors are installed in the top end of the fixing shell, an output shaft of one micro servo motor is connected with a rotating shaft, output shafts of the other micro servo motors are connected with screw rods, and the side walls of the screw rods are in threaded connection with fixing blocks; a calibration plate and a compression rod are slidably connected to the interior of the fixing shell, the calibration plate is fixedly connected to the top end of the compression rod, and the top end of the compression rod abuts against the fixing block; a contact sensor is installed in the fixing block and abuts against the top face of the compression rod. An injector is installed in the fixing shell, and a push rod in the injector is clamped into the compression rod. The automatic titration device for the microcalorimeter, provided by the utility model, has the advantage of automatically and accurately dripping a measured substance into a solution.

This utility model discloses a uniformly vented dual-magnetic-circuit moving-coil loudspeaker, including a frame, a diaphragm voice coil mounted on the top of the frame, a partition assembly mounted on the bottom of the frame's inner cavity, and a resonant cavity on opposite sides of the frame and partition assembly. A partition vent hole is circumferentially formed on the partition assembly, and a frame vent hole is circumferentially formed at the bottom of the frame. This utility model has the advantage of uniform venting, solving the problem that existing moving-coil loudspeakers, during use, do not easily and smoothly expel air from the speaker's interior, and when the diaphragm's vibration amplitude is too large, it easily causes unbalanced diaphragm vibration due to impeded air expulsion.

This application discloses a high-damping, high-modulus Mg-Y-Ni magnesium alloy and its preparation method, relating to the field of high-performance magnesium alloy preparation technology. The alloy uses Mg as the matrix, with Y and Ni as alloying elements, and the atomic ratio of Y to Ni is 1:1. The alloy microstructure consists of an α-Mg matrix and a continuous network of 18R-type LPSO phase. This high-damping, high-modulus Mg-Y-Ni magnesium alloy and its preparation method, through compositional design with an equiatomic Y / Ni ratio, precisely controls the volume fraction and interphase spacing of the LPSO phase, directly constructing a continuous network LPSO / α-Mg heterostructure in the as-cast state. This overcomes the bottleneck of traditional magnesium alloys where "increasing the modulus leads to a decrease in damping," simultaneously achieving a synergistic improvement in both elastic modulus and damping performance.

The invention relates to a multifunctional sample reaction plate preparation platform. The multifunctional sample reaction plate preparation platform comprises a sample transfer module, a reagent adding module, a drying module and a heat sealing module. The sample pipetting mechanism is detachably connected with the sample liquid sucking and spraying driving mechanism through the pipetting head quick-changing equipment; the reagent adding module comprises a reagent pipetting mechanism, a reagent pipetting needle and a reagent pipetting chamber which are communicated, the reagent pipetting chamber is provided with a reagent pipetting structure, and the reagent pipetting structure can provide pressure for the reagent pipetting chamber, so that a reaction reagent in the reagent pipetting chamber is sprayed out through the reagent pipetting needle; the drying module is used for drying a biological sample in a sample plate of the drying preparation station, and / or drying a biological sample in a reaction plate of the drying preparation station; and the heat sealing module is used for sealing the reaction plate at the heat sealing station. The flux is not limited, the plate making speed is high, sample evaporation loss and aerosol-mediated cross contamination are avoided, and meanwhile, the concentration of a reaction reagent is not easy to dilute.

The utility model discloses an automatic surface enhanced Raman spectrum detector which comprises a box body, a box cover hinged to one side of the box body, and a sample detection bin, a Raman placement bin and a plurality of liquid adding grooves which are formed in the top of the box body, a sample disc is arranged on the inner side of the sample detection bin, a sample groove is formed in the top of the sample disc, a plurality of clamping grooves are formed in the inner side of the sample groove, and a plurality of detection holes are formed in the side face of the sample disc. The sample disc, the Raman module, the liquid separator and the box body form an integrated structure, so that automatic surface enhanced Raman spectrum detection can be realized, a to-be-detected liquid, a nano reagent and a coagulant can be accurately added and mixed, the volume of the added liquid and the reaction time can be accurately controlled through software, the detection efficiency is improved, and the detection cost is reduced. The consistency of the detection processes of different batches is ensured, the interference caused by manual operation is effectively avoided, the cross contamination of reagents is prevented, the consistency of experimental conditions is improved, and the accuracy of quantitative detection is ensured.

The utility model discloses a visual high-temperature foam performance testing device which comprises a gas transmission system, a constant-temperature circulating system, a shooting system and a foam performance evaluation system, and the gas transmission system is connected with the foam performance evaluation system through a bottom valve of a double-layer chromatographic column at the bottom; and the constant-temperature circulating system is connected with the foam performance evaluation system through a connector on the left lower side and a connector on the right upper side of the double-layer chromatographic column. The visual high-temperature foam performance testing device is connected with a constant-temperature circulating system to analyze the performance of high-temperature foam. The constant-temperature circulating system is composed of a constant-temperature water bath box, a water pump and a high-temperature-resistant silicone tube, and uniform heating of the double-layer chromatographic column is achieved through jacket water circulation. High-purity distilled water is used in the water bath box, heat stability is guaranteed, the total cost of components is far lower than the price of a high-temperature foam analyzer adopting an airflow method in the market, and low-cost and efficient temperature control is achieved.