276results about How to "Prevent regurgitation" patented technology

An apical implantation mitral valve balloon closure plate blocking body and an implantation method, for human heart repair are disclosed. A balloon closure plate made from an elastic plastic material which may be filled with a gas or a curable liquid is implanted via a small incision on the left side of the chest, enters the left ventricle via the apex, and is placed and fixed at a backflow hole position of a front and rear leaflet closure point of the mitral valve. The present disclosure treats diseases such as functional mitral valve regurgitation, and the success rate for repairing functional mitral valve backflow is more than 90%.

An assembly for providing localized pressure to a region of a patient's heart to improve heart functioning, including: (a) a jacket made of a flexible biocompatible material, the jacket having an open top end that is received around the heart and a bottom portion that is received around the apex of the heart; and (b) at least one inflatable bladder disposed on an interior surface of the jacket, the inflatable bladder having an inelastic outer surface positioned adjacent to the jacket and an elastic inner surface such that inflation of the bladder causes the bladder to deform substantially inwardly to exert localized pressure against a region of the heart.

The invention discloses a separate-layer fracturing sand control string for a thermal production well and a sand control method thereof, and belongs to the technical field of the sand control in oilfield development. The string comprises two layers of strings of a sand control outer pipe and a process inner pipe, wherein the sand control outer pipe comprises a top packer, a backwashing device, a fracturing sealing tool, a fracturing filling outer tool, a one-way sealing tool, a screen pipe, an outer locating device, an interlayer packer and a pipe plug; the process inner pipe comprises a releasing tool, a fracturing filling device, a sliding sleeve switch, a locating tool and a fracturing filling conversion device. The sand control method comprises the following sand control steps of setting the top packer; releasing; setting the interlayer packer; lowering the process inner pipe, and carrying out fracturing sand control filling construction on a lower perforation interval; opening a circulating passage, and carrying out circulating filling; backwashing a well; lifting the processing inner pipe, and carrying out fracturing filling construction and circulating filling construction on other perforation intervals. As tools such as the backwashing device and the fracturing filling conversion device are used, the separate-layer fracturing sand control string for the thermal production well and the sand control method thereof have the advantages of well backwashing without moving the string, fracturing without casing pressure, flow-back prevention and the like.

The invention discloses a film-coated modified propping agent, and a preparation method and an application thereof. The film-coated modified propping agent is composed of a matrix and a resin layer uniformly coated out of the matrix, wherein the matrix is Hobq quartz sand; the resin layer is 1-10 wt% based on that of the matrix; and the resin layer comprises a resin binder and a curing agent, wherein the resin binder is bisphenol A epoxy resin, polyurethane resin or a combination thereof, the curing agent is an aliphatic polyamine curing agent an oralicyclic amine curing agent, and the usage amount of the curing agent is 10-50 wt% based on that of the resin layer. The preparation method of the film-coated modified propping agent is that the resin layer is coated on the outer surface of the matrix. The film-coated modified propping agent can be applied in fields of fracturing exploitation of oil and gas wells, is helpful to increase sand ratio and reduce usage amount of fracturing liquid, can effectively prevent backflow phenomenon, alleviates insertion of the propping agent, increases crack diversion capability, prolongs fracturing validity period, is helpful to increase oil output, reduces water yield and has significant meaning for solving the exploitation of low permeability oil field.

The invention discloses a closed wound surface treatment dressing system; polyurethane sponge is arranged on non-adhesive gauze; silica gel film is coated on the polyurethane sponge; an instilment tube and a diversion tube are respectively threaded through the silica gel film to be inserted into the polyurethane sponge; the instilment tube and the diversion tube maintained in the polyurethane sponge are respectively provided with side holes; the diversion tube is connected with the inlet tube of a diversion bottle; multi-porous adsorption material is arranged in the diversion bottle; the inlet tube and an outlet tube are respectively inserted into the diversion bottle; gap is maintained between the inlet and the outlet tubes, and the multi-porous adsorption material. The wound surface closed dressing is mainly composed of silica gel film with instilment and diversion tubes, and polyurethane sponge; the materials are all produced domestically and have good quality and low prices; the wound surface closed dressing has simple structure and convenient operation; the negative pressure diversion bottle connected with the wound surface closed dressing has an inverse flow prevention design, so as to facilitate the wild emergency treatment and the popularization in various types of hospitals including the basic level and country medical treatments units, and the VAC technology.

The invention discloses coated proppant which contains quartz sand and a resin layer, wherein the quartz sand is coated with the resin layer; the resin layer comprises a pre-cured resin layer and a curable resin layer from the inside out; the curable resin layer contains thermoplastic phenolic resin with the softening point of 85-110 DEG C and a phenolic resin curing agent; relative to 100 parts by weight of thermoplastic phenolic resin, the content of the phenolic resin curing agent is 10-30 parts by weight; the pre-cured resin layer is formed by curing bisphenol A epoxy resin with the epoxy value of 0.04-0.32 mol/100 g, novolac epoxy resin with the epoxy value of 0.45-0.65 mol/100 g and an epoxy resin curing agent. Through the technical scheme, the coated proppant provided by the invention can resist high temperature and can effectively prevent the phenomena of formation sand production and proppant return.

The invention provides a distillation apparatus. The distillation apparatus comprises a distillation bottle, a condensation bottle and a backflow bottle as well as a heating device, a condensation system, a control device and a shell, wherein the heating device is corresponding to the distillation bottle, the condensation system is corresponding to the condensation bottle, and a distillation gas inlet, a distillation liquid outlet, a condensate inlet and a condensate outlet are formed in the condensation bottle. The distillation apparatus is characterized in that the distillation bottle is provided with three bottle openings which are respectively a first bottle opening, a second bottle opening and a third bottle opening; and the distillation bottle is communicated with the distillation gas inlet of the condensation bottle through the first bottle opening, is communicated with a nitrogen flushing device through the second distillation bottle and is communicated with a sampling device and an anti-suck-back gas supply device through the third bottle opening. When the heating of the distillation apparatus is stopped, the suck-back cannot occur, the bumping is avoided in the heating process, and a tested material can be prevented from being oxidized in the heating process.

The present invention discloses a multi-stage cyclone machanism which comprises an independent first stage cyclone cylinder, a first stage cyclone net cover arranged in the first stage cyclone cylinder, and a second stage cyclone turbine component in the first stage cyclone net. A first stage cyclone space is formed between the first stage cyclone cylinder and the first stage cyclone net cover, and the first stage cyclone cylinder is detachably installed outside the second stage cyclone turbine component. One side of a first stage cyclone cylinder side wall close to the bottom is provided with a first stage dust throwing opening, and the top of the first stage cyclone cylinder side wall is provided with a first stage cyclone air inlet. The first stage cyclone cylinder is designed as an independent cyclone cylinder structure, and a simple partition is formed between the bottom of the first stage cyclone cylinder and the first stage cyclone net cover. The dust thrown from the first stage dust throwing opening is rotated to the opposite side of the first stage dust throwing opening along a dust cup wall, since the first cyclone space at the opposite side and the first dust cylinder are isolated, thus the dust loses power to fall to the bottom of the first stage dust cylinder to maintain relative stationary, the dust back sucking of the first stage cylinder is effectively prevented, and the filtering efficiency of the whole dust cup is improved.

The invention relates to a bamboo charcoal viscose facial mask base cloth and a high moisture retention and moisturizing facial mask. The bamboo charcoal viscose facial mask base cloth is prepared with the following method: 1) adding nanometer bamboo charcoal powder and sodium alga acid into dispersion solution to be dispersed evenly in bamboo charcoal serous fluid; 2) adding the bamboo charcoal serous fluid into viscose spinning solution to be dispersed evenly, and filtering and deforming to obtain mixed spinning solution; 3) carrying out wet method spinning on the mixed spinning solution toobtain the bamboo charcoal viscose, and carrying out opening, mixing, carding and lapping to obtain a bamboo charcoal viscose felt; 4) dissolving chitosan in acetic acid aqueous solution, adding gelatin to be dissolved to obtain finishing liquor, and dipping the bamboo charcoal viscose felt into the finishing liquor to carry out impregnation modification to obtain a compound fiber felt; 5) carrying out spunlace reinforcement on the compound fiber felt. The bamboo charcoal viscose facial mask base cloth has high constraint ability on serum and good water retention and moisture liberation performance; after the facial mask serum is loaded through a liquid hanging step, the high moisture retention and moisturizing facial mask is obtained, situation that serum loss due to dripping and droppingcan be avoided, and waste is avoided.

The invention discloses an oil-gas separator for a supercharged engine. The oil-gas separator comprises an oily gas inlet, an oil-gas separation passage, an oil outlet and a first gas outlet, which are sequentially communicated, wherein the oil-gas separation passage is formed by adhering an upper cover plate and a lower cover plate; the oily gas inlet and the oil outlet are formed in the lower cover plate; the oil-gas separation passage is a U-shaped passage of which the cross sectional area is gradually reduced along the flowing direction of an oil-gas mixture, and is separated from the oily gas inlet through a partition plate with through holes; a filter element opposite to the through holes is arranged on the back surface of the partition plate; a first baffle plate close to the oily gas inlet is arranged in front of the partition plate; a second L-shaped baffle plate is arranged behind the partition plate, and oil return holes are formed in the second baffle plate, and engine oil flows to the oil outlet through the oil return holes; an oil return groove is formed in the bottom of the oil-gas separation passage behind the second baffle plate, and the engine oil flows to the oil outlet through the oil return groove. According to the oil-gas separator, oil and gas can be more completely separated, the separation efficiency is improved, the consumption of the engine oil is lowered, the emission performance is improved, and the mounting space is reduced.

The invention provides fracturing tools and a staged fracturing pipe column. Each fracturing tool comprises a closed expansion type self-deblocking packer and a sandblaster connected below the closed expansion type self-deblocking packer; the closed expansion type self-deblocking packer comprises a first barrel body, a rubber barrel, a liquid flow switch and a first inner sliding sleeve; an annular groove is formed in the outer side wall of the first barrel body in a concave mode; the rubber barrel is embedded in the annular groove, seals a notch of the annular groove, can radially expand after fluid flows into the annular groove from a liquid flow hole and can retract after the fluid in the annular groove flows out; the liquid flow switch is installed in an installation hole, and connecting and disconnecting between the liquid flow hole and the annular groove are controlled through the liquid flow switch; and the first inner sliding sleeve can be axially and slidably arranged on the inner side of the first barrel body in a sleeved mode. The staged fracturing pipe column comprises the fracturing tools which are sequentially connected in series from top to bottom. According to the fracturing tools and the staged fracturing pipe column, seat sealing is safe and reliable; automatic deblocking can be achieved; the pipe column only needs to be lifted for one time after fracturing; and pipe column lifting is easy.

The invention discloses an air sucking deodorizing toilet stool and belongs to the field of sanitary products. The air sucking deodorizing toilet stool comprises a main body; the main body comprises a urinal, a main exhausting hole, a water pipe connector arranged at the tail end of the main body, a flushing pipeline communicated with the water pipe connector and surrounding the periphery of the urinal, and a flushing hole formed in the front end of the main body; an air sucking pipeline is arranged in the main body and above the flushing pipeline, a plurality of lower-row flushing holes are evenly distributed at the periphery of the urinal, a plurality of upper-row air sucking holes are arranged above the lower-row flushing holes, the lower-row flushing holes are communicated with the flushing pipeline, the upper-row air sucking holes are communicated with the air sucking pipeline, and a sewage discharging hole communicated with the air sucking pipeline is formed above the flushing holes. The air sucking deodorizing toilet stool and an air sucking deodorizing device thereof can conveniently and efficiently remove odor generated in an excreting process and keep air in a toilet fresh; furthermore, air channels of the air sucking deodorizing toilet stool are easy to clean, and the air sucking deodorizing toilet stool is convenient to disassemble and maintain.

The invention relates to a low-temperature sand-prevention resin coated propping agent for an oil-gas well and a preparation method of the low-temperature sand-prevention resin coated propping agent. The low-temperature sand-prevention resin coated propping agent comprises a propping agent aggregate, a precuring reinforced resin membrane and a low-temperature sand-prevention resin membrane, wherein the precuring reinforced resin membrane is made of reinforced resin applied to the surface of the propping agent aggregate; the low-temperature sand-prevention resin membrane is made of low-temperature sand-prevention resin applied to the surface of reinforced resin; the reinforced resin is selected from epoxy resin and/or thermoplastic phenolic resin; the low-temperature sand-prevention resin is sulfonate polyester resin.

The invention relates to a high dilution factor water sample analysis method, which includes the following steps: A, confirming input parameters: the volumes of n-1 grade dilution sample and a diluent adopted during nth grade dillution can be obtained as per the dilution factor gn of the n grade, wherein the dilution grade is m, and n belongs to the interval from 1 to m (including 1 and m), the product of dilution factors of all grades is the total dilution factor, and the dilution sample of 0 grade is a to-be-diluted sample; B, performing m grade dilution for the sample until the m grade dilution sample is formed: an injection pump is controlled through a control unit to respectively inject an n-1 grade dilution sample and the diluent both with the volumes corresponding to those of the n grade dilution in an nth mixing chamber through multi-channel direction selecting valves, so as to form the n grade dilution sample; and C, detecting the concentration of an m grade dilution sample, so as to finish the measurement. The invention further provides a high dilution factor water sample analysis device. The high dilution factor water sample analysis method and the high dilution factor water sample analysis device have the advantages of convenience for operation and accuracy in dilution.

The invention provides a natural gas hydrate synthesis and mining simulation experiment system and method. Combustible ice is synthesized by CH4 gas in a gas storage tank and clear water in a first liquid storage tank, a temperature control box, a backup pressure valve and a piston container form a combustible ice mining experiment system, and influences of the temperature, the pressure and the inhibitor quantity on combustible ice mining are analyzed by collecting the temperature, the pressure and the inhibitor quantity; meanwhile, further detailed analysis and research are conveniently carried out according to the temperature on a sand-filled tube, the internal temperature tested by a pressure probe and the change condition of the pressure; meanwhile, a one-way valve is used for preventing the back suction phenomenon caused by air interference in the experiment system, and the experiment accuracy is improved; and through the backup pressure valve, a fourth pressure gauge, a liquid injection pump and a fifth pressure gauge, precise control over the gas or liquid pressure is realized, pulses are prevented, and the accuracy of measurement and experimental results is improved. The natural gas hydrate synthesis and mining simulation experiment system is simple in structure and convenient to operate, and the experimental process is better controlled.

The invention relates to the technical field of biology, particularly a microalgae culture reactor capable of setting different concentration CO2 culture environments, which comprises a culture box, an ultraviolet lamp tube, a gas inlet pipe and a gas outlet pipe, wherein the box body of the culture box is a transparent box body; the lower side of the front end of culture box is provided with a gas inlet; the upper side of the back end of the culture box is provided with a gas outlet; the gas inlet pipe and gas outlet pipe respectively connected with the gas inlet and gas outlet of the culture box are respectively provided with a gas flowmeter and a valve; a CO2 gas analyzer for detecting carbon dioxide concentration at the gas inlet and gas outlet is arranged outside the culture box; the gas inlet and gas outlet of the culture box are respectively provided with a gas filter unit; and a humidification system is arranged in the culture box. A plurality of culture box can be arranged in parallel. By setting different concentration CO2 culture environments to screen the wild type microalgae or corresponding mutants, the complete reactor is simple in structure and convenient to operate.

The invention discloses a saline nasal sprayer which comprises a bottle body, a pump and a bottle cap. The pump is installed on the bottle body and used for pumping liquid in the bottle body. The bottle cap is buckled with the bottle body to form a closed containing cavity. The pump is located in the containing cavity. The pump comprises a spray pipe which is provided with a bacteria filtering membrane used for preventing bacteria from entering the bottle body, and the pore diameter of the bacteria filtering membrane is smaller than or equal to 0.22 micrometer. According to the saline nasal sprayer, the bacteria filtering membrane for preventing sucking bacteria back is arranged in the spray pipe, and the diameter of the bacteria filtering membrane is smaller than or equal to 0.22 micrometer so that the liquid can be effectively prevented from being sucked back, and bacteria can be filtered away to prevent secondary pollution.

The invention discloses a full-automatic continuous adjustable extractor hood adopting a capacitance-type sensor. The full-automatic continuous adjustable extractor hood comprises an extractor hood shell, and a capacitance-type sensor, a fan and a speed control circuit which are arranged in the extractor hood shell, wherein the capacitance-type sensor comprises a body base which is internally provided with a first cavity and a second cavity, and a sensor shell matched with the body base; the bottoms of the first cavity and the second cavity are communicated, liquid insulating media are filled inside the first cavity and the second cavity; the height of the first cavity is more than that of the second cavity, the liquid level sectional area of the liquid insulating media is less than that of the second cavity; the first cavity is communicated with atmosphere through an atmosphere inlet in the top, two parallel opposite electrode plates are arranged inside the first cavity along a height direction; the second cavity is communicated with a public flue through a flue gas inlet in the top; and the electrode plates are used as output ends of the capacitance-type sensor and connected with the input end of the speed control circuit, the output end of the speed control circuit is connected with a motor, and the output end of the fan is communicated with the public flue.

The invention discloses an integrated universal distiller. The integrated universal distiller comprises a heating device, a cooling device, a shell and a support, wherein the heating device is provided with a plurality of independent heating units; a ceramic electric heater is installed on a furnace frame of a heating box body; a furnace cover and a distilling bottle are arranged on the ceramic electric heater; the distilling bottle is installed in the furnace cover; the shell is provided with a plurality of heating control buttons corresponding to the plurality of heating units, heating state indicating lamps, functional regulating buttons as well as a liquid crystal display; the heating units are connected with the cooling device; the distilling bottle is connected with a condensing bottle connected with a water tank; the cooling device is connected with a control system; a volume bottle is arranged below the condensing bottle of the cooling device. The device integrates heating, distillation, condensation and receiving design; the ceramic electric heater is adopted by the heating device so as to achieve the functions of independent power regulating of a single furnace, automatic circulation of cooling water, automatic control of distillation terminal, automatic sucking-back prevention control and the like; the integrated universal distiller is practical, convenient, saves energy, protects the environment, and solves multiple defects of a traditional device.

The invention provides a suck-back prevention and deposition prevention grouting process and device for a deep waterlogged sand layer. The grouting device comprises an outer grouting tube and a grouting core tube. The grouting core tube is sleeved with the outer grouting tube through a threaded sleeve. Multiple sets of grout outlets are cut in the periphery of the outer grouting tube. Multiple rubber sleeves covering the grout outlets are arranged on the outer grouting tube. According to the suck-back prevention and deposition prevention grouting process and device, the procedures are simple, and operation is convenient; grouting is conducted on the deep waterlogged and thawed sand layer accurately through ground drilling, grouting pressure can be selected, and grout cannot be sucked back into the grouting tube after grouting is stopped. In addition, the situation that an effective grouting layer section or the grout outlets in the grouting tube are blocked due to the fact that the grout deposits at the bottom of the grouting tube can be effectively prevented; the grouting tube is cleaned with clean water after grouting is completed, grouting holes and the grouting tube can be utilized repeatedly, and repeated intermittent grouting can be conducted on a stratum.

The invention belongs to the technical field of industrial exhaust gas treatment and provides an industrial exhaust gas purification treatment system. The system comprises a gas inlet, an oil fume gas condensing tower, a wet water film high pressure industrial exhaust gas purifier, a bag dust removing device, a cold combustion electrolysis tower, a plasma photocatalytic device and a gas outlet, the above parts are orderly communicated by pipes, a fan is arranged at the gas outlet, the top of the oil fume gas condensing tower is communicated with the top of the wet water film high pressure industrial exhaust gas purifier, the bottom of the wet water film high pressure industrial exhaust gas purifier is communicated with the bottom of the bag dust removing device, the top of the bag dust removing device is communicated with the top of the cold combustion electrolysis tower, and the bottom of the cold combustion electrolysis tower is communicated with the bottom of the plasma photocatalytic device. The system solves the problem that the existing treatment device has poor industrial waste gas treatment effects and cannot satisfy the existing industrial waste gas treatment demands.

The invention provides a shipwreck escape life vest used for a ship. The shipwreck escape life vest comprises a vest body. A hanging ring is arranged at the upper end of the vest body and provided with a positioning device. Light reflective boards are arranged below the hanging ring. An inflation device is arranged on the lower portion of the vest body. A lifesaving pocket is arranged on the leftportion above the inflation device. A vital sign detector is arranged on one side of the lifesaving pocket and located in the position of the heart. A seawater purification device is arranged above the vital sign detector and connected through a rubber water pipe. A water suction port is formed in the upper end of the rubber water pipe. An oxygen supply device is arranged on one side of the seawater purification device and connected through a rubber gas pipe. An expiration pipe is arranged in the rubber gas pipe. Through the arrangement of the light reflective boards and the positioning device, rescue workers can conveniently find a drowning person in time. The shipwreck escape life vest has the beneficial effects of being convenient to wear, capable of facilitating rescue, high in victimsurvival rate and suitable for being popularized on a large scale.