9results about How to "Reduce injection pressure" patented technology

The application discloses a micro-fluidic chip reagent injection device, which comprises a liquid storage part with at least one quantitative sealed container, a flexible pressure-bearing membrane arranged on the top of the container body of the quantitative sealed container, a hard flow guide column arranged on the bottom of the container body, and a sealing membrane arranged on the liquid outlet; a liquid inlet part comprising a flow column and a liquid storage pool arranged on the micro-fluidic chip, the inner cavity of the flow column is matched with the outer diameter of the hard flow guide column, a gas guide channel is arranged on the contact surface of the flow column and the hard flow guide column for connecting the inner cavity of the flow column with the external environment, and a puncture part opposite to the sealing membrane is arranged on the flow column; wherein the hard flow guide column has a first plug-in position for making the puncture part puncture the sealing membrane when the hard flow guide column is pressed down. The device has the advantages of simple structure, low cost, convenient use, accurate quantitative injection and biological hazard prevention. The application also discloses a micro-fluidic chip reagent injection method.

The application provides a wafer level packaging method and a wafer level packaging structure. A transfer unit comprises a substrate, a plurality of first chips arranged on the substrate, and a first oxide layer arranged on the surface of the first chips. A device wafer comprises a substrate, a plurality of second chips arranged on the substrate, and a second oxide layer arranged on the surface of the substrate and the second chips. A UV pre-cured layer is formed on the edge of the substrate and is flush with the first chips. A UV adhesive layer is formed on the edge of the second chips and corresponds to the UV pre-cured layer. The UV pre-cured layer and the UV adhesive layer are bonded and cured into a UV cured connecting layer. The device wafer and the first chips are subjected to annealing treatment, so that the first oxide layer and the corresponding second oxide layer are subjected to fusion bonding, and the UV cured connecting layer is removed by decomposition. A first plastic encapsulation layer is formed at the position of the UV cured connecting layer, and the substrate is removed. A second plastic encapsulation layer is formed to cover the pores between the first chips, thereby avoiding the thermal stress problem of the heterogeneous material interface.

This invention provides a deep moderating and displacement system suitable for fractured reservoirs, its preparation method, and its application. The moderating and displacement system comprises the following raw materials in parts by weight: 0.2-1 parts of partially hydrolyzed polyacrylamide (HPAM), 0.1-0.6 parts of polyethyleneimine (PEI), 0.2-0.4 parts of silane-modified micron-sized inorganic fibers, 0.1-0.8 parts of encapsulated citric acid, 0.02-0.2 parts of heat stabilizer, 0.02-0.1 parts of metal ion complexing agent, and 196.9-199.36 parts of water. The moderating and displacement system of this invention has low initial viscosity, small injection pressure gradient, strong shear recovery ability, significant deep plugging effect, and excellent long-term thermal stability. Furthermore, it can be adjusted according to the target reservoir temperature and the dominant fracture aperture, achieving effective adaptation to fractured reservoirs with different apertures.

This invention discloses a disposable foldable implantable intraocular lens (IOL) implanter. The implantable head is installed at the front end of the injector body and includes a movable flap, a fixed flap, and a folded lens portion. The folded lens portion is located at the front end of the central axis of the implantable head, the fixed flap is located at the rear end of the folded lens portion and connected to it, and the movable flap is located to the right of the fixed flap. The movable flap and the fixed flap are connected by a folding plate, and the movable flap can rotate based on the folding plate. The inner cavity of the folded lens portion includes a tail end and a tip end. The movable flap has a pre-loading groove for the lens near the central axis, and the fixed flap has a pre-loading groove for the lens near the central axis. The diameter of the pre-loading groove for the movable flap is less than or equal to the diameter of the tail end of the inner cavity of the folded lens portion. This invention is ingeniously designed, easy to operate, easy to insert but difficult to remove, prevents reuse, and is less likely to damage the lens when folded. When the lens passes through the inner cavity of the implantable head, it is less likely to scratch the lens, thus improving safety.

The high-pressure injector capable of adjusting the injection pressure in real time comprises a machine body, a piston rod arranged in the machine body and a driving mechanism controlling the piston rod to stretch and move, a needle cylinder is detachably installed at the position, corresponding to the piston rod, of the machine body, and the piston rod can reciprocate in the needle cylinder. Pressure sensors are mounted at the ends of the piston rods; a displacement detection assembly is arranged in the machine body; a control module is integrated in the machine body, and the driving mechanism, the pressure sensor and the displacement detection assembly are all in electrical feedback connection with the control module. When the pressure sensor monitors that the internal pressure of the needle cylinder reaches a critical value, the control module can control the piston rod to retreat by a certain stroke through the driving mechanism and then control the piston rod to decelerate and advance forwards. The utility model has the beneficial effects that a contrast agent can be prevented from being injected into the blood vessel of a patient under the condition that the critical pressure is exceeded, so that the conditions of vascular rupture, vascular intima injury, contrast agent exosmosis and the like are prevented.

The application provides an oil displacement method, which comprises the following steps: firstly, injecting a drag-reducing and injection-increasing agent into a low-permeability oil reservoir, modifying the surface of rocks by the drag-reducing and injection-increasing agent, modifying the surface of rocks into a hydrophobic and oleophobic double-scarcity state, reducing injection pressure, and playing a role of reducing pressure and increasing injection; and then injecting an oil displacement agent, and realizing efficient displacement of deep residual oil and remaining oil in the oil reservoir by the low flow resistance and strong oil washing capacity of the oil displacement agent.

The invention relates to the technical field of plastic mold injection molding intelligent control, in particular to a plastic mold injection molding intelligent control method and system, and the method comprises the following steps: obtaining parameter information in an injection molding production process; monitoring the parameter information, and identifying continuous one-way drift or abnormal fluctuation in the parameter information; based on the parameter information and the continuous one-way drifting or abnormal fluctuation, judging the source of the continuous one-way drifting or abnormal fluctuation; and according to the judgment result, a control strategy of the production process is adjusted, and when the source is physical wear of the mold, the injection speed and the injection pressure are reduced, and the pressure maintaining pressure is increased or the pressure maintaining time is prolonged. Parameter abnormity caused by physical abrasion of the mold in the injection molding production process can be effectively recognized, the control strategy is adjusted in a targeted mode, the service life of the mold is effectively prolonged, the product percent of pass is increased, and the production cost is reduced.

This utility model relates to the field of oil extraction, specifically to a sealing and isolating device; it includes an upper connecting unit, a desealing unit, a sealing unit, a lower connecting unit, and an anti-backflow unit; one end of the desealing unit is connected to the upper connecting unit, and the other end is connected to the sealing unit; the sealing unit is connected to both the lower connecting unit and the anti-backflow unit; and the lower connecting unit is connected to the anti-backflow unit. This device has a reasonable structure and is easy to operate. It greatly simplifies the construction process for renovating old wells in oil fields, reduces labor intensity, lowers operational risks, and reduces construction costs.

This application relates to the field of fuel cells, disclosing an integrated injection current collector and its processing method, an inlet end assembly, and a fuel cell stack. The integrated injection current collector includes a current collector body and a sealing compound. The sealing compound is injection molded and bonded to the current collector body. The sealing compound covers the circumferential edges of each of the two sets of three-cavity ports on the current collector body and isolates them from the medium of the fuel cell stack. A sealing protrusion perpendicular to the current collector body is provided on both circumferential sides of each cavity of the sealing compound, and each sealing protrusion extends outward beyond the side of the current collector body itself. The integrated injection current collector, its processing method, inlet end assembly, and fuel cell stack of this application integrate the seal between the integrated injection current collector and the single cell and the inlet end insulation plate into one unit, eliminating the need for double-sided sealing strips on the single cell, isolating the three cavities from the medium, and eliminating the need to process sealing grooves on the core side of the inlet end insulation plate, thus eliminating cumulative errors and improving sealing performance.