69results about How to "The processing method is simple and fast" patented technology

A pressure measurement device for wing elasticity shrinkage similarity model of a large-size transport plane belongs to the technical field of wind tunnel test. The pressure measurement device employsa pressure measurement pipe bracket formed by 3D printing, an upper surface and a lower surface are completely same as local wings of a part of which pressure is needed to be measured of a skin, theupper surface and the lower surface are pasted onto the skin and a wing beam by resin, a pressure measurement hose is connected with a pressure measurement steel pipe, the pressure measurement steel pipe is arranged in the pressure measurement pipe bracket and is fixed by a top block, half-cylinder bulges are arranged at pressure measurement positions of an upper surface and a lower surface of thepressure measurement pipe bracket and are matched with pressure measurement holes of a skin surface, the pressure measurement steel pipe extends out of the pressure measurement holes in the skin surface through a pipe groove of the pressure measurement pipe on the pressure measurement pipe bracket, and a pipe axis of the pressure measurement steel pipe is required to be perpendicular to the skinsurface. The pressure measurement device is simple to install, the pressure measurement pipe bracket is light in structural mass, obvious mass and rigidity cannot be added to the model, steady pressure distribution measurement of an upper surface and a lower surface of the model can be achieved in static aerodynamic elastic tunnel experiment, and the problem that the pressure measurement pipe is difficult to install in a wind elasticity similarity model is solved.

The invention discloses a liquid chromatography-tandem mass spectrometry method for measuring 18 semi-volatile organic pollutants in water. According to the method, a clean water sample such as surface water, drinking water, and the like is simply filtered by a 0.22 [mu]m micro-porous filter membrane, and then a liquid chromatography-mass spectrometry instrument is used to separate and detect the following 18 compounds in water: aniline, benzidine, acrylamide, picric acid, carbaryl, deltamethrin, microcystic toxin-LR, dibutyl phthalate, bis(2-ethylhexyl) phthalate, dichlorvos, trichlorphon, parathion, methyl parathion, malathion, dimethoate, demeton, atrazine, and carbofuran. The provided method can detect many target substances. The detection range of the method is 0.001 to 0.49 [mu]g / L, the relative standard deviation is 0.7 to 15.4%; and the analysis method has the advantages of high sensitivity, quick analysis speed, little pollution, and simple and efficient pretreatment, is especially suitable for standard analysis of drinking water source monitoring, and solves the problems of bad conformability, large labor strength, and low analysis efficiency of the conventional standard method.

The invention discloses an elliptical porcelain insulator shape processing device and a processing method thereof. The elliptical porcelain insulator shape processing device comprises a rotation mechanism and a porcelain insulator shape processing mechanism; the porcelain insulator shape processing mechanism comprises a rack, a positioning plate arranged on the rack, a lifting device capable of moving upwards and downwards along the rack and an expansion device capable of moving back and forth horizontally along the lifting device; a fettling knife is arranged on one end of the expansion device; the expansion device is also provided with a positioning rod which cooperates with the positioning plate; the expansion device can drive the fettling knife and the positioning rod to move back and forth horizontally; the lifting device and the expansion device control the positioning rod on the expansion device to cooperate with the positioning plate, so that the fettling knife on the end of the expansion device processes the shape of the insulator earthen brick along the positioning plate. The elliptical porcelain insulator shape processing device reduces production difficulty of the elliptical porcelain insulator, and increases product percent of pass.