53results about How to "Avoid air intake" patented technology

The invention provides a test method for validating the black start ability of a hydroelectric generating set, relating to the test method for a hydroelectric generating set and aiming to provide a test method for validating the black start ability of the hydroelectric generating set under the circumstance of unexpected power failure due to an accident of a power network. The method comprises the following steps in any sequence that: the black start ability of excitation equipment is validated by the test; the black start ability of a speed controller and an oil hydraulic system is validated by the test; the black start ability of auxiliary equipment of the generating set is validated by the test; the ability of the generating set to protect self when the black start is not successful is validated by the test; and the black start ability of the generating set is evaluated. The test method provides a basis for the black start operation in case of the accident, avoids the expansion of the accident because the black start operation is performed on the hydroelectric generating set without the black start ability, and is suitable for a hydraulic power plant or a hydraulic station to stimulate and validate whether the hydroelectric generating set has the black start ability.

The invention discloses a disposable automatic flowing stopping type liquid residual prevention infusion apparatus. The disposable automatic flowing stopping type liquid residual prevention infusion apparatus is composed of a liquid inlet connector, a drip chamber, a floating valve, an infusion pipe, a dripping speed regulator, a liquid medicine filter, a liquid outlet connector, a closed type air guiding mechanism, a hand-operated pressurization pump and a gallbladder-like bottle rinsing dripping-in device, wherein the closed type air guiding mechanism is additionally arranged on a liquid route above an infusion pipe and can guide purified air which comes from an infusion bottle into an infusion pipe cavity from top to bottom at the end of the infusion on that day, the hand-operated pressurization pump is additionally arranged on the infusion pipe, and the gallbladder-like bottle rinsing dripping-in device is additionally arranged on the liquid inlet connector. The disposable automatic flowing stopping type liquid residual prevention infusion apparatus is characterized in that flowing can be automatically stopped after the previous infusion bottle stops dripping; blood coagulation and liquid route blocking possibly caused by blood return in an infusion needle can be avoided; the closed type air guiding mechanism can be opened in advance and closed freely by a nurse and is safe, flexible and convenient to use, precious residual liquid in the infusion bottle and the infusion pipe can be completely infused into a human body, waste can be avoided, and the curative effect can be ensured; pressurization can be conducted so that rapid infusion can be conducted to rescue a patient; blood exposure accidents can also be avoided even when the patient faints in a toilet along with the infusion bottle. The disposable automatic flowing stopping type liquid residual prevention infusion apparatus is used for conducting clinical continuous infusion and preventing residual liquid.

The invention relates to a venous catheter provided with double reflux-preventing valves and a making method of the venous catheter, and belongs to the fields of medical apparatuses and medical materials. The venous catheter provided with the double reflux-preventing valves is composed of a catheter body and a connecting tube, wherein a longitudinal opening is kept in the sidewall of the head endof the catheter body; a high-elasticity pad is designed on a tube holder of the connecting tube; an incision is designed on the pad, so that effects as a second valve can be achieved; and through a double-valve structure which is formed between a proximal end and a distal end, double reflux-preventing effects can be achieved. The valves are made from polyurethane, silicon rubber, thermal elastomeror other high polymer materials having elasticity. The venous catheter provided with the double reflux-preventing valves is arranged between the two valves in vitro, and a positive/negative control system can be formed in vivo, so that the state of the catheter can be better regulated and controlled in processes of conducting infusion, blood drawing and standing by, so that various using requirements can be satisfied. The venous catheter provided by the invention is applicable to transvenous chemotherapy drug delivery; and a problem of reflux in a cathetering process can be effectively solved, so that problems of thrombus and occlusion, which are caused by the reflux, can be relieved, and the cathetering duration of the catheter can be prolonged.

This is a multi-functional water lifesaving protective equipment belonging to the technological field of water lifesaving articles. It consists of waterproof breathing device and floating clothing, among which the floating clothing for man to wear and breathing device is put on people's head. The water- repellent and breathing device includes waterproof cover, breathing waterproof implement and breathing straw. The intracavity of the waterproof cover is connected with the breathing straw, which is linked with the breathing waterproof implement. The floating clothing is one-piece undershirt, including waterproof cold-proof clothes and the one-piece undershirt. The water cold-proof clothes is of elastic one-piece style, with the one-piece undershirt tightly fixed outside. This invention can prevent from being choked, drowned, frozen, and can keep the drowned warm and alive to win the valuable time for the succour's arrival. This Invention is especially suitable for salvage by perils of the sea, and for the divers who works underwater in short of oxygen equipments.

The invention belongs to the technical field of water supply equipment, and discloses non-negative-pressure horizontal water supply equipment with a purification function. The non-negative-pressure horizontal water supply equipment comprises a tank body, wherein a breather valve shell is fixedly mounted at an air duct flange at the top of the tank body, and an air inlet valve head is fixedly connected to the top of the breather valve shell; and an inner vent hood and an activated carbon filter cartridge are fixedly mounted in the breather valve shell. A slow-release piston, large liquid grooves and a small liquid groove jointly form a hydraulic liquid slow-release mechanism, the downward release speed of hydraulic liquid is reduced, the ascending speed of the slow-release piston is slowed down, a push rod is limited by the slow-release piston, and the ascending speed of the push rod is slowed down at the same time, so that the closing speed of the piston at a connecting port is reduced, the closing time is prolonged, the opening time of a ventilation channel is prolonged, the time for injecting gas inwards is prolonged, ventilation can still be performed for a period of time after the internal and external pressure difference is lower than a threshold value, internal negative pressure is thoroughly eliminated, the negative influence of the negative pressure on the environment in the tank body is reduced to the maximum extent, and the service life of the tank body is prolonged.

The invention discloses a ship with low water resistance. The ship comprises a ship body and a speed increase cabin positioned below the ship bottom, wherein a horizontal choke section, a contracting section, a water feeding section, an arched section and a draining section which are connected end to end are sequentially arranged on the ship bottom from front to back; an opening at the rear end of the speed increase cabin is a water outlet which is positioned at the tail of the ship body; an opening at the front end of the speed increase cabin is a water inlet; the upper end of the water inlet on the wall of the speed increase cabin is positioned in the middle of the horizontal choke section; the bottom surfaces of the ship in the horizontal choke section, the water feeding section and the draining section are parallel one another; the arched section is upwards arched; two impellers which are positioned at the same horizontal position and arranged in parallel are arranged in the arched section; and the two impellers are in respectively driving connection with a motor. The speed increase cabin is sequentially thinned from front to back, can be used for supplying water to the impellers more sufficiently and has high water flowing speed and more remarkable effects for forward absorption and backward push. In addition, the arched section on which the impellers are mounted are arranged, thus the work areas of the impellers are far greater than the section area of a cavity below the draining section. Therefore, the ship disclosed by the invention has higher driving speed.

The invention discloses an anti-falling device for bridge construction. The device structurally comprises a net bag frame, a two-way air cylinder, a base, moving wheels, an anti-skid plate, a mountingcavity and a power device; moving wheels are installed at the bottom of the base. The mounting cavity is formed in the middle of the base, a power device is mounted in the mounting cavity; the powerdevice is communicated with the two-way air cylinders arranged on the two sides respectively; the top of the bidirectional cylinder is connected with the net bag frame; the bottoms of the bidirectional cylinders are connected with antiskid plates; the power device comprises an air inlet disc, a communicating pipe, a transmission structure and a motor. The communicating pipe is horizontally placedin the middle of the mounting cavity. The beneficial effects of the invention are that the load of the motor can be reduced under the action of the lever; extending is conducted in an intermittent airinlet mode, a traditional air inlet mode of an air inlet cylinder is avoided, the height of the power device can be reduced, the occupied area of the power device is reduced, the size of equipment isreduced, potential safety hazards caused by using a belt can be avoided in an air pressure mode, and using safety is improved.

The invention provides a household welcome mat, and relates to the field of mats. The household welcome mat comprises a plastic pad, wherein upper sides of outer parts of annular seats are connected with air outlet sleeves at equal intervals in a penetrating manner; through suction holes are equidistantly formed in surfaces of rubber plates; bottoms of ejector rods are connected with tops of the rubber plates; support springs sleeve lower sides of the outer parts of the ejector rods; the tops of the support springs are connected with surfaces of hollow blocks; rubber cylinders sleeve the topsof the outer sides of the ejector rods; the bottoms of ejector springs are connected with the tops of the ejector rods. The annular seats, the air outlet sleeves and the rubber plates are used cooperatively, so that when the welcome mat is stepped, the suction holes in the rubber plates generates suction force by air pressure in the annular seats to steadily suck the welcome mat on the ground whenbeing stepped and to prevent the welcome mat from slipping; when the stepping force is off the welcome mat, the suction holes in the rubber plates are in contact with the suction force between the welcome mat and the ground after sucking air.

The invention belongs to the field of water conservancy projects, and particularly relates to a water pipe fixing and burying device for water conservancy projects. Aiming at the problem that a water pipe is inconvenient to fix in the prior art, the following technical scheme is provided: the water pipe fixing and burying device comprises a fixing box, a through hole is formed in the fixing box, a base plate is fixedly mounted on the inner wall of the bottom of the fixing box, two sliding plates are slidably mounted at the top of the base plate, clamping plates are fixedly mounted on one sides of the two sliding plates, a top cover is in contact with the top of the fixing box, a pressing plate is fixedly mounted at the bottom of the top cover, cross rods are rotatably mounted on two sides of the fixing box, connecting rods are in threaded connection with the outer sides of the two cross rods, one ends of two connecting rods are fixedly connected with the two sliding plates correspondingly, two annular grooves are formed in inner wall of through hole, and annular air bags are arranged in the two annular grooves correspondingly. According to the water pipe fixing and burying device for water conservancy projects, a pipeline can be conveniently fixed, meanwhile, the sealing performance of connection between the pipeline and the fixing box can be better, so that water is prevented from entering the fixing box, in addition, the structure is simple, and the use is convenient.

The invention discloses a wind driven generator blade root area surface flow control mechanism which comprises a blade, a self-vibration reed, a clamping component, a first sealing plate, a second sealing plate and a clamping box, the outer surface of the blade is provided with a mounting groove matched with the self-vibration reed, the self-vibration reed is mounted in the mounting groove, and the clamping box is arranged in the mounting groove. Two third sealing plates are mounted on the end face, close to the mounting groove, of the inner wall of the blade, the third sealing plates are perpendicular to the inner wall of the blade, the two third sealing plates are oppositely mounted, a sealing groove is formed in each third sealing plate, and a sliding plate is slidably connected to the interior of each sealing groove; the clamping block can be clamped to the gap between the first sealing plate and the second sealing plate for sealing, the first sealing rubber is arranged on the outer wall of the clamping block so that sealing can be achieved between the clamping block and the first sealing plate and between the clamping block and the second sealing plate, and the effect of preventing water and air from entering is achieved.

The invention discloses a plugging component, a fairing and an aircraft. The plugging component comprises a plugging part, two butting flanges, a plurality of separation bolts and a plurality of mounting holes; each butting flange in the two butting flanges corresponds to a half fairing included by the fairing, each butting flange is fixed to the butting position of the corresponding half fairing,the plugging part comprises a connecting plate and a wind blocking plate connected with the connecting plate, the connecting plate is located between the two butting flanges, and the wind blocking plate is located on the outer side of the half fairing; and each mounting hole in the multiple mounting holes penetrates through the connecting plate and the two butting flanges, each separation bolt inthe multiple separation bolts corresponds to one mounting hole in the multiple mounting holes, and each separation bolt is mounted in the corresponding mounting hole, so that the connecting plate andthe two butting flanges are fixed together. The technical problem that in the prior art, excessive separation bolts are used in plugging of the fairing is solved.

The invention relates to the field of peptide manufacturing, in particular to a preparation method and a preparation device of an administrable ganglioside supplementing peptide, and the method comprises the following steps: screening concentrated whey protein, polydextrose, fructo-oligosaccharide, bovine brain peptide, [gamma]-aminobutyric acid, phosphatidylserine and isomaltooligosacharide, controlling moisture, and then quantitatively weighing; uniformly stirring concentrated whey protein and polydextrose to obtain a mixture 1; uniformly stirring and mixing fructo-oligosaccharide, bovine brain peptide and [gamma]-aminobutyric acid to obtain a mixture 2; performing high-speed mixing treatment on the mixture 1, the mixture 2, phosphatidylserine and isomaltooligosacharide to obtain a mixture; and performing vacuum drying and sterilization on the mixture. The device comprises a subpackaging cylinder, a sealing cover covers the top end of the subpackaging cylinder, the device further comprises a funnel and a gas isolation assembly, and subpackaging assemblies are placed at the positions, corresponding to a plurality of flow dividing pipes, of the bottom of the subpackaging cylinder; and the product prepared by the invention is wide in applicability and good in curative effect, and can be prevented from being in contact with external gas during subpackaging.

The invention discloses a low-water-resistance ship with a speed-increasing cabin water inlet provided with a variable-height sealing body. The low-water-resistance ship comprises a ship body and a speed-increasing cabin located below the ship bottom. A horizontal air blocking section, a contraction section, a water inlet section, an arching section and a water outlet section are arranged at the ship bottom sequentially from front to back and are connected one by one in an end-to-end mode. An opening in the rear end of the speed-increasing cabin is a water outlet, and the water outlet is located in the tail of the ship body. An opening in the front end of the speed-increasing cabin is the water inlet. The upper end of the water inlet of the wall of the speed-increasing cabin is located in the middle of the horizontal air blocking section. The ship bottom faces at the horizontal air blocking section, the water inlet section and the water outlet section are parallel. The arching section arches upwards and is internally provided with two impellers which are located at the same horizontal position and are arranged side by side. The two impellers are respectively in transmission connection with a motor. The width of the speed-increasing cabin decreases sequentially from front to back, water is supplied to the impellers more fully, the water flow speed is higher, and the front absorbing and back pushing effects are more obvious. As the arching section provided with the impellers is arranged, the working areas of the impellers are much larger than the area of the section of a lower cavity of the water outlet section, and the low-water-resistance ship has a higher running speed.