86results about How to "Realize self-sealing" patented technology

The invention relates to a nucleic acid detection chip. The detection chip comprises a sample chamber unit arranged in the middle, a first siphon valve, a reaction chamber unit and a reagent storage and introduction unit, wherein an added nucleic acid sample is stored in the sample chamber unit which divides the nucleic acid sample equally under the action of rotation; the first siphon valve is communicated with the sample chamber unit and introduces the nucleic acid sample into the reaction chamber unit by siphon; the reaction chamber unit is arranged at the edge and mixes the nucleic acid sample with a reagent for nucleic acid reaction, and a reaction chamber of the reaction chamber unit is also communicated with a second siphon valve; the reagent storage and introduction unit is communicated with the reaction chamber unit, a reaction reagent is stored in the reagent storage and introduction unit, after the nucleic acid sample is introduced into the reaction chamber unit, the reaction reagent is introduced into the reaction chamber unit, so that the reaction reagent is subjected to a reaction with the nucleic acid sample, and various blood viruses can be detected. The detection chip has high degree of automation, an operator can detect nucleic acid only by adding the sample once, and control precision is high.

The invention relates to the technical field of rail transit of vacuum pipelines, in particular to a partition device of a vacuum pipeline. The partition device comprises a shell, the shell is transversely arranged between two adjacent pipeline beams, the shell is respectively in sealed connection with two adjacent pipeline beams, openings matched with the inner diameters of the two adjacent pipeline beams are formed in the two side surfaces of the shell respectively, a track beam connecting section and a gate are arranged in the shell, the track beam connecting section and the gate are respectively and slidably connected into the shell, the width of the track beam connecting section and the gate are matched with the width of the shell, the size of the gate is larger than that of the opening. According to the partition device, by the adoption of the device, automatic sealing of the gate can be realized by utilizing the air pressure difference, pressing force does not need to be applied, the pipeline beam can be segmented in a segmented mode, the independent region can be conveniently restored to normal pressure, the recovery speed is improved, the time and the cost are reduced, therescue evacuation efficiency is improved, the normal operation of the train cannot be influenced at ordinary times, the structure is practical, and the installation is convenient.

The invention relates to a nucleic acid detection device based on a microfluidic chip. The device comprises a chip chamber for accommodating a chip, a motor, two sample adding pumps, a radiator and acontroller, wherein the chip chamber comprises a chip chamber upper cover, a chip chamber middle ring and a chip chamber lower ring which are connected from top to bottom sequentially; the motor and the sample adding pumps are arranged on one side of the chip chamber, the sample adding pumps are driven by the motor to act to add a nucleic acid sample to the reaction chip; the radiator is arrangedon one side of the chip chamber and used for cooling the reaction chamber to control the temperature of the reaction chamber within a preset range; the controller completes a reaction test by controlling the rotation speed and temperature of the reaction chip as well as the motor; the chip comprises a chip upper layer, a chip lower layer and a chip middle layer which are arranged sequentially, andan FTA (filter paper) card is arranged in the chip middle layer. The device has high degree of automation, an operator can realize nucleic acid detection only by single sample addition, and control precision is high.

The invention discloses a novel self-service nursing bed for postoperative patients. The novel self-service nursing bed comprises a bed body, a urinal and a driving mechanism, wherein a sliding plate is arranged at the upper side of the bed body, the bottom of the sliding plate is installed on a track of the surface of a bed board in a matched mode through pulleys, a backing plate is hinged to the rear end of the sliding plate through a pin shaft, a driving rod is arranged at the position, located at the hinge portion, of the backing plate, and the driving rod is hinged to the driving end of a main driving mechanism fixed at the bottom of the bed body; a through hole is formed in the middle of the bed body, and a urine leaking hole is formed in the sliding plate; the urinal is connected to the bottom of the sliding plate, and an upper opening of the urinal is located under the leaking hole. After the sliding plate moves backwards, the urine leaking hole located in the sliding plate can correspond to the through hole in the bed board. When the main driving mechanism is controlled to recover the sliding plate and the backing plate in the flat-on state, the urine leaking hole, the through hole and the upper opening of the urinal do not correspond any more, and the upper opening of the urinal can be sealed.

The invention provides a total-pressure high-speed exhaust valve, which comprises a cylinder, a main valve cavity, an air guide and exhaust barrel, a sealing floating body, a piston spring and a main valve piston. The main valve cavity is arranged on the lower part of the cylinder; the air guide and exhaust barrel is arranged in the main valve cavity; the sealing floating body is arranged in the air guide and exhaust barrel; the main valve piston is provided with a vertical through hole; the main valve piston comprises a piston column, a cylinder piston and a sealing baffle plate, the cylinder piston and the sealing baffle plate are respectively arranged at the upper end and the lower end of the piston column, an air exhaust and supplement opening is formed in the side wall of the lower part of the cylinder, and a main valve port is formed in the cavity wall of the main valve cavity; the piston spring is sleeved on the piston column and is positioned between the cylinder piston and the upper cavity wall of the main valve cavity; and the upper end of the sealing floating body corresponds to a lower port of the vertical through hole of the main valve piston. The total-pressure high-speed exhaust valve has the advantages that the design is scientific, and the valve can be automatically sealed without the aid of a floating ball or a lever when the inside of a pipe has water.

The invention discloses a neodymium-iron-boron rotary hydrogen decrepitation furnace utilizing thermal expansion and cold contraction for pressurizing and sealing. The neodymium-iron-boron rotary hydrogen decrepitation furnace structurally comprises a supporting bottom plate, a temperature reducer, two retainers, a controller, a rotating rod, a discharging pipe, a hydrogen decrepitation furnace body and a feeding pipe. The two retainers are mounted on the two sides of the supporting bottom plate, and the lower end of the temperature reducer is attached to the upper end of the supporting bottomplate. The right side of the controller and the left sides of the upper ends of the retainers are welded, and the right side of the rotating rod penetrates through the middle section of the lower endof the left side of the hydrogen decrepitation furnace body. Through the neodymium-iron-boron rotary hydrogen decrepitation furnace, the problems that a feeding pipe of a traditional hydrogen decrepitation furnace in the market often guides external air into the furnace during hydrogen decrepitation, especially in a machining workshop, the machining workshop is equipped with a large number of large cooling fans, the air is guided into the hydrogen decrepitation furnace through the feeding pipe more easily in the high-speed rotating process of the fans, consequently, the magnetic property of powder is weakened significantly, and neodymium-iron-boron fine powder is even likely to be naturally oxidized by the air to catch fire are solved.

The invention discloses a dry powder material powder leakage preventing bulk machine head device. The dry powder material powder leakage preventing bulk machine head device comprises a soft connectionpart, a movable assembly and a non-movable assembly. The movable assembly comprises a material guiding barrel and a material guiding barrel base ring. The outer side of the material guiding barrel isconnected with the material guiding barrel base ring. The material guiding barrel base ring is connected with a lower inverted-cone-shaped sealing cover through two or more vertical bolt assemblies,and the big end of the inverted-cone-shaped sealing cover is arranged downwards. The non-movable assembly comprises a material guiding barrel limiting ring and a material receiving cone barrel. The material guiding barrel and the bolt assemblies in the movable assembly penetrate an outlet in the bottom of the material receiving cone barrel and the material guiding barrel limiting ring and move upand down. After unloading is finished in the structure, the inverted-cone-shaped sealing cover ascends and makes contact with the outlet in the bottom of the material receiving cone barrel for closing, automatic sealing is achieved, dust pollution and powder leakage waste are prevented, and the work efficiency is improved.

The invention discloses a method for increasing extraction borehole gas extraction concentration through auxiliary boreholes, including the steps of (1), drilling a plurality of extraction boreholes side by side by a drilling rig with small-diameter drill pipe on a roadway coal seam, and broaching on the basis of the boreholes by a drilling rig with large-diameter drill pipe; (2), blocking the boreholes effectively, performing primary extraction of gas in the boreholes through gas extraction pipes, further blocking the extraction boreholes and filling the blocking sections with semi-fluid slurry when the extraction concentration of gas is lower than 50%; (3), drilling a plurality of auxiliary boreholes around the side-by-side extraction boreholes by the drilling rig with small-diameter drill pipe when the concentration of gas is lower than 30%, and pouring to block the auxiliary boreholes. The method has the advantages of increasing borehole extraction utilization rate and gas extraction concentration, shortening effective extraction cycle and relieving tension in succession of exploitation, and is easy to operate and low in cost.

The invention relates to pressure cooker, in particular to an electric pressure cooker. The electric pressure cooker is capable of automatically sealing, preventing overflow during boiling and automatically venting. The electric pressure cooker comprises a pot, a pot cover, a pot sleeve and an electric heating program panel and is characterized in that a first lever and a second lever are sequentially mounted on the pot cover, the left end of the first lever is mounted below an upper pressure valve of the pot cover, and the left end of the second lever is located above the right end of the first lever; a third lever and an electromagnetic valve are mounted at the bottom of the pot sleeve, and the electromagnetic valve is mounted near the left end of the third lever; a transmission lever is mounted on the side in the pot sleeve, the upper end of the transmission rod is located below the right end of the second lever, the lower end of the transmission rod is located above the right end of the third lever, a timer is added to the electric heating program panel, and the electromagnetic valve is connected with the timer. A microcomputer controls the electromagnetic valve to trigger a venting mechanism for venting, venting time and frequency can be set, and boiling and non-boiling control of various cooking functions can be achieved.

The invention discloses a self-enclosed packer which is applied to sealing of a ring-shaped gap between a pile and a sleeve in a marine drilling platform, and arranged between the sleeve and the pile, The self-enclosed packer is characterized by comprises a rubber sleeve; the rubber sleeve is coaxial with the sleeve and arranged at the inner bottom of the sleeve; the bottom of the rubber sleeve is in sealed connection with the sleeve through a bottom fixing device; a cement mortar accommodating cavity is formed in a gap between the rubber sleeve and the sleeve; the top of the rubber case is connected with the sleeve through a top fixing device; mortar grouting openings are formed in the top of the rubber case. Only the rubber case and the corresponding fixing devices are subjected to automatic sealing, so that the self-enclosed packer is simple in structure, easy to manufacture and low in cost; besides, the self-enclosed packer has the advantages of being high in safe factor like an active packer, simple to mount like a passive packer, free of pipelines and power systems, and the like.

The invention discloses a bio-organic fertilizer fermentation device, comprising scrapers and liquid collecting plates, a stirring roller is arranged on the left side of each scraper, and a fermentation bin is arranged on the right sides of the scrapers; the left sides of the stirring rollers are connected with a rotating roller, and a motor is connected to the upper side of the rotating roller; apulling plate is arranged below the scrapers, and a shaping bin is arranged below the pulling plate; a shaping plate is arranged in the shaping bin, a pressing plate is mounted on the right side of the shaping plate, a hydraulic rod is connected to the right side of the pressing plate, and a hydraulic pump is disposed on the right side of the hydraulic rod; and a partition plate is installed above the scrapers, the right side of the partition plate is provided with a feeding port, and the interior of vent holes are provided with activated carbon filter screens. The bio-organic fertilizer fermentation device has strong stirring effect, can purify pollution gas generated during a fermentation process, reduces environmental pollution, and can shape organic matter after the fermentation is finished, thereby reducing the later operation process.

The invention belongs to the field of preparation of absorption expansion resin, and particularly relates to a preparation method and application of pH-sensitive water-absorption expansion resin. Thepreparation method of the pH-sensitive water-absorption expansion resin comprises the following steps: carrying out copolymerization reaction on acrylamide, acrylic acid, methacryloyloxyethyl trimethyl ammonium salt and a cross-linking agent N,N-methylene bisacrylamide in a solvent under the condition that the pH value is 5-7, wherein the molar ratio of acrylamide to methacryloyloxyethyl trimethylammonium salt is (1-2):(1-2), the mass of acrylic acid accounts for 18-22% of the mass of acrylamide, and the mass of the cross-linking agent accounts for 1-6% of the total mass of acrylamide, acrylic acid and methacryloyloxyethyl trimethyl ammonium salt monomers. According to the preparation method of the pH-sensitive water-absorption expansion resin, the comonomer and the cross-linking agent are selected, so that the resin has pH sensitivity and relatively strong water retention capacity, and can tolerate a complex formation pressure environment.

The invention discloses a magnetic suspension floor drain core. The magnetic suspension floor drain core comprises a core body and a sealing cover, wherein the upper portion of the core body is cylindrical; an opening of the upper end of the core body is a water inlet; an outlet of the lower end of the core body is a water outlet; the lower portion of the core body is a mounting seat; the lower portion of the sealing cover is a supporting rod; a first magnet is arranged in the cavity of the supporting rod; the sealing cover is inserted in the cavity of the mounting seat through a supporting rod; the bottom of the cavity of the mounting seat is sealed through a bottom cover; a second magnet is arranged in the bottom cover; the first magnet repels the second magnet; the supporting rod is driven to rise under the effect of repulsive force so as to drive the sealing cover to seal the water outlet in an abutted manner. Automatic sealing of a floor drain can be realized, deodorization and insect prevention effects can be achieved, and the magnetic suspension floor drain core is effective for a long time.

The invention discloses a door and window device with an automatic noise reduction function. The door and window device with the automatic noise reduction function comprises a frame and a sealing device, wherein a first window body and a second window body are arranged in the frame in a sliding fit mode; the sealing device comprises a first sealing assembly, a second sealing assembly and a third sealing assembly; sliding grooves are formed in the upper end and the lower end of the first window body and the upper end and the lower end of the second window body correspondingly; two guide rails which are arranged side by side and correspond to the sliding grooves are arranged on the frame; the guide rails comprise a movable guide rail and a fixed guide rail; displacement devices are arranged in the frame and correspond to the two sides of the movable guide rail; the two ends of the movable guide rail extend into open grooves in the two sides and are connected with the displacement devices; each displacement device is used for driving the movable guide rail to move towards the fixed guide rail; and sealing can be effectively achieved through the acting force of wind by arranging the movable guide rail, so that the sealing effect of the window in windy weather is guaranteed while the daily window gap ventilation effect is guaranteed, and the ventilation effect of daily use is guaranteed while automatic sealing is achieved.

The invention discloses a cover layer seal film for a strain gauge, and a production method and a using method thereof. The cover layer seal film comprises a strain gauge cover layer, the seal layer surface of the strain gauge cover layer is provided with an adhesive layer, and the adhesive layer is adhered with cover layer release paper, wherein the strain gauge cover layer is provided with a plurality of marking points, and positions, corresponding to strain gauge bonding pads, of the strain gauge cover layer, are hollow-out; and the cover layer seal film is used for sealing the whole straingauge. The cover layer seal film can realize the automatic sealing of the whole gauge strain, especially special-shaped pattern sealing which cannot be realized through a conventional technology, allows the alignment precision to be 3 times higher than that the manual alignment precision, improves the sealing efficiency by 5 times or more, and completely solves the problems of low efficiency, unstable quality and poor product consistence of existing artificial production.

The invention relates to the technical field of air sampling, in particular to air pollution prevention and control sampling equipment which comprises a shell and a plurality of air storage bottles, first through holes communicated with inner cavities of the air storage bottles are formed in the upper surfaces of the air storage bottles, piston blocks are slidably connected into the inner cavities, second through holes communicated with the inner cavities of the air storage bottles are formed in the bottom surfaces of the air storage bottles, and the piston blocks are slidably connected into the second through holes. A blocking hole transversely penetrating through the second through hole is formed in the side face of the lower portion of the gas storage bottle. The front side surface of the shell is provided with a mounting groove for arranging and mounting a plurality of gas storage bottles in parallel; an in-place detection sensor is arranged on the top surface, corresponding to the first through hole, of the mounting groove; an air outlet communicated with the second through hole is formed in the bottom surface, corresponding to the second through hole, of the mounting groove; an air inlet power assembly, a pipeline valve assembly, an air storage cylinder sealing assembly and a control assembly are arranged in the shell. The problems that an existing air sampler is single in air sampling direction and inconvenient to carry and use due to the fact that the extraction mode is single and cannot be adjusted and controlled are solved.