Patents
Literature
Patsnap Copilot is an intelligent assistant for R&D personnel, combined with Patent DNA, to facilitate innovative research.
Patsnap Copilot

80results about How to "The solution is limited" patented technology

Method for enhancing acidification effect of oil well of offshore oil field

The invention discloses a method for enhancing the acidification effect of oil well of offshore oil field. The method for enhancing the acidification effect of oil well of offshore oil field includesthe following steps that an oil well production pipe string is taken up; an acidification construction operation pipe string is lowered down; ground acidification equipment, a pressure pulse pluggingremoval device and a pipeline are connected, an acidification wellhead manifold valve is closed, and pressure tests of an acidification process pipeline are conducted; a displacing liquid is prepared,a mud pump wellhead manifold valve is opened, and pilot injection of the oil well is conducted; the mud pump wellhead manifold valve is closed, a wellhead manifold valve of the pressure pulse plugging removal device is opened, and an energy generator pneumatic valve is opened or closed; the mud pump wellhead manifold valve is opened, and the pumping and injection of a mud pump are conducted; circulating well cleaning operation is conducted; the mud pump wellhead manifold valve and the wellhead manifold valve of the pressure pulse plugging removal device are closed, the acidification wellheadmanifold valve is opened, and the pumping and injection of an acid liquor are conducted; the acidification wellhead manifold valve is closed, the mud pump wellhead manifold valve is opened, and the pumping and injection of the displacing liquid are conducted; the circulating well cleaning operation is conducted; and the ground acidification equipment, the pressure pulse plugging removal device andthe pipeline are disassembled.
Owner:CHINA NAT OFFSHORE OIL CORP +1

Green and efficient fresh-keeping method for apricots

PendingCN113100285AResolve susceptibility to pathogen infectionSolve the decayFruits/vegetable preservation by irradiation/electric treatmentAcidic food ingredientsBiotechnologyMicroorganism
The invention provides a green and efficient fresh-keeping method for the apricots, and the method comprises the following steps: treating fresh apricots with dielectric barrier discharge (DBD) low-temperature plasmas, treating a solvent of a coating material with radio frequency discharge low-temperature plasmas, preparing a coating solution from the treated solvent, and then carrying out coating treatment. According to the method, low-temperature plasmas prepared in different forms are applied to fresh keeping of the apricot fruits, and the scheme provided by the invention maintains a clean microenvironment of the fruits. The defects of existing pure coating preservation and low-temperature plasma preservation treatment are overcome, the problem that the effect of killing and inhibiting pathogenic bacteria of fruits and vegetables is limited in the coating preservation technology is solved, and the phenomenon that the fruits and vegetables are easily infected by environmental microorganisms again in the storage period through pure low-temperature plasma treatment is avoided; and the problem that the apricot fruits are easily infected by pathogenic bacteria and are rotten and deteriorated in the storage process is well solved. Under the treatment of the method, the low-temperature fresh-keeping period of the apricots is greatly prolonged to 60 days or above from about 30 days at present.
Owner:NANJING FORESTRY UNIV

Smart community cloud visual intercom system

InactiveCN105898195ASolve problems with large structural limitationsThe solution is limitedClosed circuit television systemsTwo-way working systemsMobile appsThe Internet
The invention discloses a smart community cloud visual intercom system, which comprises a background system, a background management system, an entrance machine, a mobile APP and a management central machine, wherein the management central machine is connected with the background management system and the entrance machine, the background management system and the entrance machine are connected with the background system, the background system is connected to the mobile APP through a wireless network, and the mobile APP is further connected with the entrance machine. The entrance machine calls a unit and then requests the background system to initiate a request through an HTTP (Hyper Text Transport Protocol), the background system receives the request and pushes the request to a corresponding mobile phone APP, the mobile phone APP analyzes request information, judges the network type, establishes connection with the entrance machine and carries out video voice intercom, and a user can also control remote unlocking through the mobile phone APP. The mobile APP of the user can also be bound with a smart home, and smart home equipment is controlled by the mobile APP through a network request. According to the invention, multiple terminals are connected to the internet simultaneously, information is managed through a cloud server, the user can answer calls of the entrance machine at all times and places, and the installation cost is reduced.
Owner:CHONGQING SMART HOME TECH DEV CO LTD

Full electronic type multichannel constant current source and current adjustment method thereof

InactiveCN107256054ASolve the restrictive problem of only being able to power a single objectThe solution is limitedAc-dc conversionElectric variable regulationMicrocontrollerMicrocomputer
The invention discloses a full electronic type multichannel constant current source and a current adjustment method thereof. The multichannel constant current source includes a power supply conversion module, a shunt output module, a controller, an input module, and a display module; the power conversion module converts an alternating current power supply into a direct current power supply; the shunt output module includes a plurality of parallel shunt branches, and an input end of each shunt branch is connected to an output end of the power supply conversion module; each shunt branch has a current detection unit, an adjustable resistor, and a resistor adjustment drive unit; the current detection unit in each shunt branch can detect a current value of the shunt branch and transmits the current value to a single chip microcomputer; the single chip microcomputer compares a current set value set by a user and a current detection value, the resistor adjustment drive unit adjusts the resistance of the adjustable resistor in each shunt branch, the changed current detection value is identical to or similar to the current set value. The full electronic type multichannel constant current source can supply a constant current source to a plurality of test objects at the same time, and can perform adjustment and real-time monitoring on the output constant current source.
Owner:HOHAI UNIV

Comprehensive protection method for direct-drive type permanent magnet wind generator

The invention discloses a comprehensive protection method for a direct-drive type permanent magnet wind generator. The comprehensive protection method comprises the following four technological processes operating synchronously: a protection process of cooperation of an overcurrent protection method, an over-temperature protection method and an insulation protection method, a protection process of cooperation of the overcurrent protection method, the over-temperature protection method and the insulation protection method, a protection process of cooperation of an unbalance degree protection method, the over-temperature protection method and the insulation protection method, and a protection process of cooperation of the over-temperature protection method and the insulation protection method, when any one of the above protection processes is judged to be required to be subjected to shutdown protection, other protection processes of the whole method are terminated and the generator is maintained and protected. The method can perform effective and perfect protection on the direct-drive type permanent magnet wind generator by the above processes, so as to solve the technical problems that the generator maintaining method in the prior art has limited effects and imperfection for protection.
Owner:BEIJING ETECHWIN ELECTRIC

Clamping table for machining slanting tee joint valves

The invention relates to a clamping table for machining slanting tee joint valves. The clamping table for machining the slanting tee joint valves comprises a first worktable, a guide track beam, a second worktable, a clamp table, a stud, a positioning bolt, a pressure plate, a front V-shaped positioning block, a rear V-shaped positioning block and an auxiliary supporting rib, wherein the first worktable is connected with the second worktable through the guide track beam; a slot which is in sliding fit with the guide track beam is formed in the lower end of the clamp table; the stud is vertically mounted at the left upper end of the clamp table; the pressure plate is mounted on the stud in a sleeving manner, and is positioned on the stud by matching the positioning bolt and threads of the stud; the front V-shaped positioning block and the rear V-shaped positioning block are fixed on the clamp table from front to back; the auxiliary supporting rib is horizontally fixed at the right upper end of the clamp table; and the front end and the rear end of the auxiliary supporting rib are respectively connected with the front V-shaped positioning block and the rear V-shaped positioning block correspondingly. The clamping table for machining the slanting tee joint valves has the advantages of reasonable structural design, low production and manufacturing cost, convenience in operation and use and the like; and the slanting tee joint valves with different gradients can be clamped and positioned.
Owner:WUHU JIENUO TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products