5results about How to "Reduce dead volume" patented technology

The invention provides a high-pressure durability test method for a hydraulic fluid module. The high-pressure durability test method comprises the following steps: acquiring target test pressure and target pulse frequency of the hydraulic fluid module; calculating a minimum fluid volume required by a test element based on this; a metal cylinder and an optional metal ball are filled in an inner cavity of the test element, and the actual effective fluid volume of the test element is adjusted to meet the minimum volume requirement; connecting a test system, injecting and heating a test medium, and then applying a pulse pressure waveform conforming to a target parameter to carry out a durability test; and finally, judging the durability of the test element by monitoring whether the test element leaks or not. By actively and accurately adjusting the effective fluid volume of the test element, effective formation and stable transmission of the high-pressure pulse waveform are ensured, and the reliability and accuracy of the fatigue life test of the hydraulic element under the high-pressure working condition are remarkably improved.

The invention discloses a medicine inspection sample preparation method and device, and belongs to the technical field of medicine inspection. According to the method, through the key steps of gradient alkalifying pH linkage control, gradient elution, temperature programming drying quality monitoring, pre-enrichment and the like, accurate treatment of a test solution is realized; the core lies in that a capillary microfluidic analysis chip with a multi-layer composite structure is adopted, the channel size matching and connection design is optimized, and the sample treatment efficiency and purity are improved. The corresponding device integrates an intelligent control system, a pH monitoring module, a laser particle size monitoring module and the like, and full-process automatic control is achieved. The defects that in the prior art, operation is tedious, the automation degree is low, sample loss is large, and a micro-fluidic chip is large in dead volume are overcome, the prepared sample is high in purity and accurate in concentration, the method is suitable for various types of samples to be tested, the accuracy and efficiency of drug inspection can be remarkably improved, and the method has important industrial application value.

The utility model relates to a pressure swing adsorption tower system capable of improving product gas CO purity, which comprises an adsorption tower, a tower top pipeline assembly and a tower bottom pipeline assembly, a tower top airflow distributor and a drainage cylinder are arranged at the top of the adsorption tower, the drainage cylinder is in a circular truncated cone shape, the top of the drainage cylinder is connected with the tower top airflow distributor, and the bottom of the drainage cylinder is connected with the inner wall of the adsorption tower. Airflow passing through the tower top flows through the drainage cylinder, so that the volume of the tower top for accommodating gas is reduced; the top of the adsorption tower is connected with a tower top pipeline assembly, and the tower top pipeline assembly sequentially comprises a pre-adsorption gas outlet pipe, a pressure-equalizing gas outlet pipe, a pressure-equalizing gas inlet pipe, an adsorption tail gas outlet pipe and a replacement gas outlet pipe from inside to outside, so that replacement gas discharged from the adsorption tower can pass through the tower top pipeline assembly and then is discharged from the replacement gas outlet pipe; residual light component gas in the tower top pipeline assembly is taken away as much as possible; the bottom of the adsorption tower is connected with a tower bottom pipeline assembly; the tower bottom pipeline assembly sequentially comprises a vacuumizing gas outlet pipe, a reverse gas outlet pipe, a replacement gas inlet pipe, a raw material gas inlet pipe and a pre-adsorption gas inlet pipe from inside to outside.

The utility model relates to a kind of phenolic wastewater treatment catalytic / filter coupling device, it relates to a kind of phenolic wastewater treatment device.The utility model is to solve the technical problems that the existing catalytic oxidation-membrane separation coupling process exists unit long, catalyst loss and membrane pollution.The utility model first couples sludge biochar catalytic oxidation and microfiltration membrane in same device, with integrated design significantly shorten process, reduce dead volume and energy consumption;Through the three-stage gradient interception structure of hierarchical aperture metal screen-PP cotton-microfiltration membrane, form the particle size barrier from bottom to top, synergistically inhibit the loss of sludge biochar and membrane pollution, so that sludge biochar maintains high activity in continuous operation, to ensure water quality while extending the stable operation period of system, provide new technical paradigm for the economic and efficient advanced treatment of phenol-containing wastewater.

This application relates to a sunken stockpile structure for expanding stockpile capacity. This application is applicable to the field of material storage and transportation technology. The technical problem to be solved by this application is: to provide a sunken stockpile structure for expanding stockpile capacity. The technical solution adopted in this application is: a sunken stockpile structure for expanding stockpile capacity, comprising: a sunken stockpile site; at least one feeding conveyor belt located above the sunken stockpile site, with its lower part fixed to the sunken stockpile site by supports; at least one underground channel located below the sunken stockpile site, with at least one unloading port above each underground channel; a discharge conveyor belt disposed within the underground channel; a sealing cover covering the sunken stockpile site; and several mist cannons evenly distributed within the sunken stockpile site.