60results about How to "Meet the needs of actual work" patented technology

The invention discloses a steel bar cutter, which comprises a machine frame (1), a power mechanism, a circumferential rotating device (2), a longitudinal feeding device (3), a pressing device (4), an ejecting fulcrum (5), a punching device (6), an operating console (7) and a cutting device arranged outside the machine frame, wherein a motor I in the circumferential rotating device (2) drives a plurality of rotating carrier rolls consisting of driving wheels and driven wheels in pair to rotate; a steel bar rotates with the rotating carrier rolls; the cutting device arranged outside the machineframe cuts a circle of cut mark mouth on the steel bar; the longitudinal feeding device (3) feeds the steel bar to the rear table top of the machine frame (1); the punching device (6) punches the steel bar suspended behind the ejecting fulcrum (5); and the steel bar is cut off suddenly at the cut much mouth. The steel bar cutter has the advantages of steam line operation, continuous feeding, mechanical conveying, high cutting speed, high working efficiency, simple operation, time and labor conservation and production cost reduction.

The invention discloses an optical waveguide chip and PD (photodiode) array coupling packaging structure. The optical waveguide chip and PD array coupling packaging structure comprises a soleplate, a waveguide supporting rack, a waveguide chip and a substrate, wherein a third sign line surface is arranged on the back surface of the substrate of the waveguide chip; a first sign line surface and a second sign line surface are arranged on the substrate respectively; the PD array with an upward photosensitive surface is adhered to the first sign line surface; a U-shaped spacer with an upward opening is adhered to the second sign line surface; the groove width of the U-shaped spacer is equal to the width of the waveguide chip; and the waveguide chip, of which the third sign line surface and the second sign line surface have corresponding widths, penetrates through a U-shaped groove of the U-shaped spacer and is positioned over the PD array. The optical waveguide chip and PD array coupling packaging structure can control axial positions, so that passive alignment of the optical waveguide chip and the PD array can be achieved.

The invention belongs to the technical field of chromatographic detection, and specifically relates to a method for quickly detecting vancomycin by utilizing LC-MS (Liquid Chromatography-Mass Spectrometry). The method comprises the following steps: smashing a to-be-detected sample, adding an extracting reagent, and uniformly mixing; then carrying out ultrasonic extraction, and centrifuging, thus obtaining supernatant; extracting the supernatant by adopting water saturated normal hexane, thus obtaining a to-be-purified solution; activating through an MCX solid-phase extraction column, taking and sampling the to-be-purified solution, carrying out drip washing and impurity removing by using methanol, then eluting by using amonium methanol, and collecting an eluent; concentrating, forming a constant volume by using a constant volume solution, and filtering, thus obtaining a purified solution; detecting the purified solution by adopting an HPLC-MS (High Performance Liquid Chromatograph-MassSpectrometer). The method disclosed by the invention has the advantages that the problems of large matrix effects, low sensitivity and the like existing in a process of detecting animal derived foodand particularly the animal derived food with a high fat content in the prior art are well solved, ideal recovery and precision degree are obtained, the minimum detection limit of the method is 0.3 mug / kg, and repeatability and reproducibility of an analysis result are effectively ensured.