32results about How to "Meet high pressure requirements" patented technology

The invention discloses a high break-over voltage LED flip-chip and the fabrication method thereof, which is easy to integrate, low in cost, good in heat dissipation effect and good in high voltage resistance. The integrated chip comprises a plurality of LED flip-chips(1) and a plurality of silicon bulks(2); each LED flip-chip(1)is composed of an underlay(10), an N type epitaxial layer(11) and a P type epitaxial layer(12); at least one heat conduction insulated layer is developed on each silicon bulk(2); metal layers(6) are deposited on the heat conduction insulated layers; the corresponding N type epitaxial layers(11) and P type epitaxial layers(12) of the LED flip-chips(1) are reversely welded respectively on two separate metal layers through weld beads(80,81). The LED flip-chips (1) are connected into a circuit through the metal layers (6). The fabrication method includes the steps of forming the heat conducting insulated layer, the metal layers and an LED flip-chip enclosure.

The invention provides a driving circuit for a dual-fuel-injector high-speed electromagnetic valve of an opposed two-stroke engine. The driving circuit comprises a timing sequence control module for driving two cylinders and four electromagnetic valves, a voltage detection module, switching diodes D1 and D2, an energy-storage capacitor C, three high-end MOS tubes MH1, MH2 and ML and four-end MOS tubes M1, M2, M3 and M4, wherein inductance coils of the four electromagnetic valves are respectively inductance coils L1 and L2 of two electromagnetic valves corresponding to the air cylinder A and inductance coils L3 and L4 of two electromagnetic valves corresponding to the air cylinder B. According to the invention, by means of the mode that a drive structure switches from parallel driving to tandem driving, and the form that driving high pressure of the electromagnetic valves is adopted for respective driving at an initial stage of current rising, so that the fact that currents of the electromagnetic valves rapidly rise to a target current is ensured; and a total current, borne on a circuit board, of the electromagnetic valves is equal to a current that one electromagnetic valve is driven during two subsequent states, namely a high current opening stage and a small current keeping stage.

The invention relates to the field of oil field development, in particular to a soluble toe end sliding sleeve for well cementation and well completion, and a use method thereof. The soluble toe end sliding sleeve for well cementation and well completion comprises an upper joint and a lower joint, wherein a first through hole is formed in the axial direction in the upper joint; the upper end of the lower joint is inserted into the upper joint; an annular cavity is formed in an overlapping surface of the lower joint and the upper joint; a second through hole is formed in the axial direction inthe lower joint; a first groove is formed in a position, positioned in the annular cavity, of the inner wall surface of the upper joint; and a second groove is formed in a position, positioned in theannular cavity, of the outer wall surface of the lower joint. A high-intensity soluble alloy inner sleeve is arranged between the upper joint and the lower joint, so that a tool and a tubular column meet a high-pressure-bearing requirement in the well cementation colliding pressing process; and automatic dissolution is realized in a later period, so that the inside and outside communication of thetool is realized. Through the wall surface recess treatment on the wall bodies of the upper and lower joints, the effective isolation of the inner sleeve from well fluid is ensured; meanwhile, pipe body weakness is artificially preset; and when a liquid inlet inner sleeve of a sealed cavity needs to be dissolved, pressurized opening can be easily realized, and the opening is reliable.

The invention discloses a high continuity voltage up-mounted LED integrated chip with static protection which has the advantages of low cost, easy integration, good heat dissipation effect and high-pressure resistance and a manufacturing method thereof. The integrated chip comprises a plurality of LED bare chips (1) and silicon substrates (2), wherein, the LED bare chips (1) comprise substrates (10), N-type epitaxial layers (11) and P-type epitaxial layers (12), heat conducting insulating layers are formed on the front surfaces of the silicon substrates (2), metal layers (6) are deposited on the heat conducting insulating layers, the LED bare chips (1) are up-mounted on the metal layers (6) and are connected through the metal layers (6) to form a circuit, anode contacts (80) and cathode contacts (81) are led out from the metal layers (6). The manufacturing method comprises the following steps: forming the heat conducting insulating layers, forming the metal layer and encapsulating the LED bare chips, and is widely applicable to the LED bare chip field.

The invention discloses a methanation method and device for preparation of synthetic natural gas. The method comprises that raw material gas subjected to catalyst poison purification removal enters into a first methanation reactor and undergoes a methanation reaction with most of H2 and CO, and the reaction gas enters into a second methanation reactor and undergoes a methanation reaction with the rest of H2 and CO so that dry gas subjected to methanation has CH4 content greater than 93% and a calorific value greater than 33MJ / M<3>. The invention also discloses a device for implementation of the method. The high-efficiency energy-saving compact large-scale natural gas methanation preparation technology and device are especially suitable for the conditions that many ammonia synthesis factories need coal gasification and purification low pressure apparatuses and ammonia synthesis middle / high pressure apparatuses. Middle and small scale ammonia synthesis factory high-pressure compressor and high-pressure synthesis device in China can be transformed into an artificial natural gas synthesis device so that a large amount of investment is saved. The technology and device have important effects.

The invention relates to a high-pressure resistant and corrosion resistant turbine flowmeter. A circle of a conical surface I is arranged at the outer part of one end of a connection pipe joint of each high-pressure hermetical structure; a groove is formed in each conical surface I; an O-shaped ring is arranged in each groove; a conical surface II is arranged at the outer part of the other end of the connection pipe joint of the high-pressure hermetical structure; a compressing nut is arranged on each connection pipe; one end of a pre-amplifier is connected with the signal output terminal of a sensor; the two high-pressure hermetical structures are in screw connection with the fluid inlet I and the fluid outlet II of the sensor through the compressing nuts; the conical surface I of the connection pipe joint at one end is in fastened fit with a conical opening of the fluid inlet I of the sensor, and the conical surface I of the connection pipe joint at the other end is in fastened fit with a conical opening of the fluid outlet II of the sensor; an impeller of the sensor is made of duplex stainless steel; the impeller shaft of the sensor is made of high-hardness elastic alloy; the impeller shaft can meet the requirements of abrasion resistance and corrosion resistance at the same time; the impeller can meet the requirements of magnetic conductivity and corrosion resistance at the same time; a conical surface hermetical structure can meet the requirement of high pressure of 40 MPa.

The invention relates to an LNG regasification experiment system. The LNG regasification experiment system comprises an LNG circulation unit and a propane circulation unit, wherein the LNG circulationunit comprises an LNG liquid tank, a liquid outlet valve, a plunger type booster pump, a pressure stabilizing tank, a micro-channel vaporizer, a back pressure valve, an air temperature type reheater,an emptying pipe, a three-way valve I, a pressure reducing valve and a liquid storage tank; and the propane circulation unit comprises a propane liquid storage tank, a propane circulation pump, a three-way valve II, a floating coil type heat exchanger, an electric heater, a liquid inlet valve and a discharge valve. The invention further relates to an experiment method based on the experiment system. The experiment method comprises the following steps: system construction, propane cooling, LNG vaporization, flow control and LNG reheating. The LNG regasification experiment system and the experiment method have the advantages that the propane circulation unit is additionally arranged, so that direct heat exchange between propane and LNG fluid is avoided; and meanwhile, a large amount of latent heat is released by utilizing phase change heat exchange of the propane, so that the occurrence of an icing phenomenon in a heat exchange process of the micro-channel vaporizer is effectively reduced, and efficient operation of the micro-channel vaporizer is guaranteed.

The invention discloses a control method for improving warping of an aluminum-based mixed compression structure laminated board, which comprises the following steps of: optimizing a laminated structure to ensure that a thickness ratio of an aluminum-based core board dielectric layer to a core board dielectric layer in an inner core board is more than or equal to 10:1; manufacturing the inner-layer core plate; manufacturing an aluminum-based component, namely, after cutting the aluminum-based component, carrying out hot pressing on the aluminum-based component once in advance; pressing, namely pressing the inner-layer core plate and an aluminum base together by adopting a vacuum laminating machine; conducting plate warping leveling treatment, specifically, after pressing is conducted, conducting leveling treatment by a plate warping leveling machine; carrying out X-Ray targeting; ceramic grinding; manufacturing an outer-layer circuit; performing acid etching; carrying out resistance welding; forming a character; performing gold immersion; carrying out e-T testing; forming CNC appearance; and inspecting a finished product. The aluminum base and the inner core plate with preset thickness are selected, so that the whole PCB is lighter and thinner, the warpage of the PCB is reduced, the high-pressure-resistant requirement of the PCB can be met, hot pressing is performed once by using a high-temperature press (200 DEG C) in advance, the thermal stability of the aluminum base is improved, the hot-pressing expansion and shrinkage change of the aluminum base is reduced, and the high-flatness requirement of a customer on a product is met.

Disclosed is a resistor for isolating a resistor element by utilizing an integral ceramic tube; the resistor comprises a frame, wherein a resistor unit is arranged in the frame, and the resistor unitis fastened and connected with the frame through a supporting piece; the resistor unit is a chip resistor unit which is formed by resistor strips or resistor pieces in a circuitous forming mode up anddown; and the end heads of the upper and lower circuitous ends of the resistor strips or the resistor pieces in the resistor unit are isolated and positioned through the integral ceramic tube. Clamping grooves are formed in the outer surface of the integral ceramic tube according to the arrangement spacing of the resistor strips or the resistor pieces of the resistor unit, the two end parts of the resistor strips or the resistor pieces are integrally clamped into the clamping grooves of the integral ceramic tube, and isolation insulation and positioning can be formed between the end heads ofthe resistor strips or the resistor pieces through the corresponding clamping grooves. The integral ceramic tube is directly clamped into opening grooves of the resistor strips or the resistor pieces,so that isolation and positioning of the resistor strips or the resistor pieces is realized, the creepage distance of the resistor strips or the resistor pieces is prolonged, and the insulating performance of the resistor is improved.

The invention discloses a small-size high-voltage-resistance electromagnetic relay. The small-size high-voltage-resistance electromagnetic relay comprises a shell, a base, a movable reed, a static reed, a pushing clamp and a magnetic circuit portion; the shell is connected with the base; the bottom portions of the static reed, the movable reed and the magnetic circuit portion are installed on thebase, the pushing clamp is cooperated between the movable reed and the magnetic circuit portion; a large distance is arranged between the movable reed and the static reed; a high wall is protruded atthe base upwards, the pushing clamp comprises a vertical piece and a push arm horizontally connected to the vertical piece, the top portion of the vertical piece of the pushing clamp is rotationally installed at the top portion of the high wall of the base through a rotating shaft, and the push arm of the pushing clamp is cooperated with the position, close to the root, of the movable reed. The small-size high-voltage-resistance electromagnetic relay can achieve high pressure resistance under the condition of a small volume, can avoid early fatigue fracture of the movable reed due to large-stroke movement, and can avoid the phenomenon that a pushing clamp falls off to cause product failure under the condition of a large vibration impact.

The invention provides a driving circuit for a dual-fuel-injector high-speed electromagnetic valve of an opposed two-stroke engine. The driving circuit comprises a timing sequence control module for driving two cylinders and four electromagnetic valves, a voltage detection module, switching diodes D1 and D2, an energy-storage capacitor C, three high-end MOS tubes MH1, MH2 and ML and four-end MOS tubes M1, M2, M3 and M4, wherein inductance coils of the four electromagnetic valves are respectively inductance coils L1 and L2 of two electromagnetic valves corresponding to the air cylinder A and inductance coils L3 and L4 of two electromagnetic valves corresponding to the air cylinder B. According to the invention, by means of the mode that a drive structure switches from parallel driving to tandem driving, and the form that driving high pressure of the electromagnetic valves is adopted for respective driving at an initial stage of current rising, so that the fact that currents of the electromagnetic valves rapidly rise to a target current is ensured; and a total current, borne on a circuit board, of the electromagnetic valves is equal to a current that one electromagnetic valve is driven during two subsequent states, namely a high current opening stage and a small current keeping stage.

The invention discloses a heat exchanger with an observation window and for low temperature of 80K. According to the structure, a mechanical sealing mode is adopted, indium wires are used as sealing materials, and visual observation of the phase change process at the low temperature is realized. The heat exchanger has the beneficial effects that a phase change cavity is made of red copper, so thatthe heat exchange efficiency is effectively improved; an upper cover plate is made of stainless steel materials, so that the pressure bearing capacity of the heat exchanger is enhanced under the condition that heat leakage by an upper surface is reduced; the observation window is arranged between the upper cover plate and a heat exchange cavity, so that visual observation of the phase change process is realized; and the upper cover plate and glass, and the glass and the phase change cavity are sealed by the indium wires, so that components with different linear expansion coefficients are wellsealed in the cooling process, and phase change heat exchange and observation at the low temperature of 80K are realized.

The invention relates to an oil injector, and relates to the technical field of oil injection devices. The oil injector comprises an oil injector housing, an oil injection plug circulating motion pushing member, an oil injection plug and a driving shaft, and the middle portion of the oil injector housing is provided with a spindle hole; the oil injector housing is provided with a piston hole; a piston hole at the bottom of the oil injection plug is a compression chamber; the oil injector housing is provided with an oil injector oil inlet and an oil injector oil outlet; the driving shaft is provided with an oil inlet passage for communicating the oil injector oil inlet with a circulation breakover oil injector oil outlet; when the oil injection plug circulating motion pushing member bringsthe oil injection plug to a high position, the oil inlet passage communicate with the oil injector oil outlet through the compression chamber; and when the oil injection plug circulating motion pushing member brings to the oil injection plug to a low position, the oil inlet passage is blocked from the compression chamber. By means of the oil injector, a worm wheel, a worm and a swash plate are used for converting rotation in the horizontal rotation into reciprocating linear motion in the vertical direction, and the oil injector has the characteristics of being compact in structure, reliable inuse, easy and convenient to maintain, adjustable in oil injection amount and capable of achieving self-protection.

The invention provides a high voltage circuit of a semiconductor sensor. The high voltage circuit of a semiconductor sensor includes a direct current pulse PMW module, a bootstrap high voltage circuit, a voltage doubling circuit, and a resistive subdivision feedback circuit, wherein the direct current pulse PMW module adjusts the magnitude of the voltage amplitude and the duty cycle of an input power source, generates a closed loop controlled direct current pulse PMW signal, and outputs the direct current pulse PMW signal to the bootstrap high voltage circuit; the bootstrap high voltage circuit modulates the direct current pulse PMW signal into a bootstrap high voltage signal and outputs the bootstrap high voltage signal to the voltage doubling circuit; the voltage doubling circuit is usedfor amplifying the bootstrap high voltage signal by multiple times to form a high voltage signal, and one branch of the high voltage signal is directly outputted, and the other branch of the high voltage signal is input into the resistive subdivision feedback circuit; and the resistive subdivision feedback circuit performs resistive subdivision on the high voltage signal and outputs the feedbackvoltage to the direct current pulse PMW module. A single lithium battery can be used for supplying power for the high voltage circuit of a semiconductor sensor. The high voltage circuit of a semiconductor sensor is low in power consumption which is less than 5 mW. The output current of the high voltage circuit of a semiconductor sensor can reach 1 mu A, thus satisfying the high voltage demand fora large area multi-pixel Si semiconductor sensor.

The invention discloses an LNG regasification and liquid air preparation system, which comprises an LNG regasification subsystem, an air liquefaction subsystem and a reheating subsystem. The LNG regasification subsystem and the air liquefaction subsystem perform heat exchange through the LNG vaporizer, and the LNG regasification subsystem and the reheat subsystem perform heat exchange through a heat exchanger. The LNG regasification subsystem consists of sequentially connected liquid storage tanks, submersible pumps, liquid outlet valves, LNG vaporizers, and heat exchangers; the air liquefaction subsystem includes sequentially connected air cleaners, compressor units, LNG gas The carburetor and gas-liquid separator etc.; the reheat subsystem consists of sequentially connected compressor units, circulation pumps and heat exchangers. The invention utilizes the liquid air preparation process to recover and store the cold energy released in the LNG regasification process, thereby reducing energy waste in the LNG regasification process. The invention also discloses a working method of the LNG regasification and liquid air preparation system.

The invention relates to organic high-pressure-resistant borehole sealing resin, which comprises polyurethane resin mixed components and polyaryl polymethylene isocyanate. The organic high-pressure-resistant borehole sealing resin is characterized in that the polyurethane resin mixed components comprise 100 parts of polyether system by weight, 3-4 parts of foaming stabilizer B8460 by weight, 1.2-2.1 parts of catalyst by weight and 4.8-6 parts of foaming agent by weight; the polyether system comprises 40-60 parts of polyether polyol YD-4110-4 by weight, 30-40 parts of polyether polyol YD-1050 by weight and 10-20 parts of polyether polyol YD-405 by weight; the catalyst comprises 0.4-0.7 part of PC-12 by weight, 0.4-0.7 part of PA-300 by weight and 0.4-0.7 part of PA-400 by weight; the foaming agent comprises 2.4-3 parts of HFC-245fa by weight and 2.4-3 parts of HFC-365mfc; and the ratio of the weight parts of polyurethane resin mixed components to the weight parts of polyaryl polymethylene isocyanate is 100: (100-105). The organic high-pressure-resistant borehole sealing resin has advantages that the permeability is very good, micro-fissures in a borehole can be well filled, the strength of final reaction products is high and the high-pressure resistance is obviously improved; and the bonding force with a coal wall is also enhanced, the resin can be well bonded with the surrounding part of a borehole wall and the requirement on high-pressure resistance required for hydraulically fractured borehole sealing can be satisfied.

The invention relates to a high-voltage NPN device integrated with a JFET clamping structure. The device comprises a low-voltage NPN triode and a JFET, and the low-voltage NPN triode is integrated with the JFET; the collector electrode of the low-voltage NPN triode is connected with the source electrode of the JFET; the drain electrode of the JFET is used as the collector electrode of the high-voltage NPN device; and the base electrode and the emitting electrode of the low-voltage NPN triode are respectively used as the base electrode and the emitting electrode of the high-voltage NPN device. The device is designed and manufactured by using a conventional low-voltage process, and the high-voltage-resistant requirement can be met without increasing the areas of other devices.

The invention relates to a wiring terminal with pins stretching out in staggered positions. The wiring terminal includes a pedestal, clamping pieces arranged on the pedestal and conductive pins arranged on the clamping pieces, the conductive pins include front pins and rear pins, the conductive pins on two adjacent clamping pieces are different, each front pin includes a front fixed part and a front insertion part arranged on the front fixed part, and the front insertion part is close to the front end of the pedestal; and each rear pin includes a rear fixed part and a rear insertion part arranged on the rear fixed part, and the rear insertion is close to the rear end of the pedestal. Compared with the prior art, the wiring terminal with pins stretching out in staggered positions provided by the invention has the following advantages: the wiring terminal is simple in structure and convenient to assemble, and compared with the prior art, the front pins and rear pins of different structures are adopted, so that distance between the front insertion part and the rear insertion part which are adjacent is far larger than distance between two adjacent insertion parts in an existing wiringterminal, and thus an electrical interval requirement that needs to be fulfilled when high voltage is applied can be met.