139results about How to "Solve the problem of airtightness" patented technology

The invention relates to a micro electro mechanical system (MEMS) manufacturing process-based micro atomic cavity air tightness package structure and a method. The structure and the method are characterized in that: a micro atomic cavity which is manufactured by the MEMS process is arranged in a glass or metal seal buffer cavity through a supporting structure, and the air tightness of the micro atomic cavity is improved, so that the service life of devices such as a micro atomic clock and the like based on the micro atomic cavity is prolonged, and the stability of the devices is improved. The structure and the method have a key point that: in the glass or metal buffer cavity structure, the inside of the buffer cavity is vacuumized or filled with buffer gas of which the components and the pressure are approximate to those of gas in the micro atomic cavity, and a leading wire of the micro atomic cavity passes through the buffer cavity to realize air tightness lead. By the package structure and the method, the leakage rate of the micro atomic cavity and outside can be effectively reduced, and the technical problem of short service life of micro atomic cavity devices is solved. The air tightness package structure is particularly suitable for the micro atomic cavity devices such as micro atomic clocks, micro atom magnetometers, micro atom gyroscopes and the like with low power consumption and small volumes.

An inlet guide vane assembly is disclosed, which comprises: a housing, configured with a first penetration part and a plurality of first grooves; at least one fixing ring, each configured with a second penetration part and a plurality of second grooves; at least one rotary ring, each configured with a third penetration part and a plurality of sliding chutes, wherein the first, the second and the third penetration parts are arranged in communication with one another; a plurality of vane units, each vane unit is composed of a vane, a linkage and a sliding block; and at least one driving unit, for driving one vane of the plural vanes to swing, thus driving the rotary ring to rotate simultaneously, bringing along the other vanes to swing, enabling the sliding blocks to slide inside corresponding sliding chutes, and consequently flipping the vane from a first state to a second state.

The invention discloses a combustible liquid vapor explosion and explosion suppression characteristic test system. The system comprises an explosion tank, a double heating temperature-control system, a gas distribution system, a double ignition delay explosion suppression system, and a data test and acquisition system. The explosion tank is provided with a window and six through holes. The explosion tank is covered by a heating sheet of the double heating temperature-control system on the explosion tank. An insulation material is covered on the heating sheet. The temperature-control system is connected with the heating sheet and an air heater. An air compressor of the gas distribution system communicates with a through hole I through the air heater, an ejector, and an ejector pipe. A gas discharge pipe communicates with a through hole II. A vacuum pump communicates with a through hole III. A static pressure sensor communicates with a through hole IV. An ignition electrode of the double ignition delay explosion suppression system is arranged in the explosion tank, and is connected with a delay circuit and a high-voltage power source through the through hole V. An explosion suppression tank is arranged on the top of the explosion tank. A gas generator is arranged in the explosion suppression tank. A nozzle is arranged on the bottom of the explosion suppression tank. A dynamic pressure sensor of the data test and acquisition system is arranged on the through hole VI, and is connected with an oscilloscope through a signal amplifier. The system provided by the invention has the advantages of simple application, multiple test functions, and high precision.

The invention provides a nitrogen-oxygen separation device and a corresponding oxygenerator. The nitrogen-oxygen separation device comprises a gas intake module, a separation module and an oxygen output module; the gas intake module comprises a sealing cover, a switching rotation sliding block and a drive motor; the separation module comprises at least two molecular sieve assemblies, a molecular sieve front cover and a molecular sieve back cover; the oxygen output module comprises a sealing element and a gas outlet element. The invention also provides the oxygenerator. Due to the arrangement of the gas intake module in the nitrogen-oxygen separation device and the corresponding oxygenerator, the nitrogen-oxygen separation device has the advantages of simple structure, small size and low manufacture cost; and at the same time, due to the arrangement of the gas intake module, the nitrogen-oxygen separation device has good air tightness and high oxygen generating efficiency.

The composite material box body structure for storage and transportion box of missile is characterized by that said box body structure possesses the shallow arched single shell plate structure with longitudinal reinforcement member and transverse reinforcing rib and correspondent symmetrical layer-spread form, its four-side base plate of said box body structure is made up by using four-side small arch degree and shallow arched shell plate and four-corner cylindrical shell plate which are smoothly connected togher, along the length direction of base plate of box body the transverse reinforcing ribs are uniformly-spaced and placed, two ends of said box body adpots the all-composite material flange flanges which are connected with box body base plates together and formed into one body, so that said box body structure possesses high specific strength.

Involves windows and doors hinge which between the mechanical hardware the domain three dimensional may move, aims at the existing windows and doors a hinge, two approaches may the mode similar product dense be proper. The gas tightness unsatisfactory designs a kind of hinge. The design key point is x axial is equipped with the adjuster bolt in this hinge main body, gyrates the adjuster bolt in hexagon, will lead the slide displacement, will be is moved by the fixture to x axis direction. Gyrates adjusting screw which the substrate nose turns on lathe into, will be is fixed the object to move to x axis direction. Gyrates adjusting screw which the substrate nose turns on lathe into, will be is fixed the object to move to the y axis direction. Gyrates the wrap to enter main body minister of the interior in the axle sleeve the axis in hexagon, will cause by the solid object to move to the z axis direction. The kind of structure hinge reliability greatly is the enhancement, solved the windows and doors dense to be proper and the gas tight not good question. Has the prominent substantive characteristic, the product scale has the remarkable enhancement, thus lengthened the windows and doors service life.

The invention discloses a forming method of a mixed-stitch composite material of three-dimensional woven prefabrication body fabric. The method comprises the following steps that thermoplastic resin fibers and reinforced fibers are premixed or reinforced fibers attached with thermosetting resin films and reinforced fibers are premixed, so that resin and the reinforced fibers are subjected to synchronous mixed stitch knitting; during stitch knitting, resin adhesive films are laid in the set portion of the fabric in a needling mode; after stitch knitting is finished, the set portion of an obtained three-dimensional woven prefabrication body is subjected to three-dimensional stitch laying through stitch laying resin fibers; the resin content of the set portion is increased, and the obtained three-dimensional woven prefabrication body fabric is subjected to vacuum mould pressing linkage forming. By the adoption of combined application of the above three technologies, the forming method can adapt to a traditional composite material hot press molding process, the prepared fiber composite prefabrication body fabric can be used for forming machining of the composite material directly through a hot press molding mold, the gas tightness in a vacuum infusion RTM process is achieved, and the production efficiency is effectively improved.

The invention relates to a fabric for an airbag, wherein the warps and wefts of the fabric consist of polyamide or polyester fibers. The fabric is characterized in that the dry and wet hot shrinking percentages of the polyamide or polyester fibers are below 5%, and the size rate of change of the fabric for the airbag after hot water and hot wind treatment as well as coating of 35-115g/m<2> silica gel resin on the surface of the fabric is less than 3%. The invention further relates to a fully moulded airbag comprising the fabric for the airbag as well as a manufacturing method thereof. On the basis of lowering the cost, the invention solves the problems of size stability, smoothness, air impermeability, high strength, ageing resistance and the like of existing fully moulded airbags.

The invention discloses a fire and explosion protection structure installed on a cable intermediate head, and a use method thereof, and belongs to the technical field of the fire and explosion protection of a cable head. The fire and explosion protection structure comprises an outer box body, an assembling end cover, a disposable sealing end cover and an inner sealing ring, wherein the longitudinal assembling surface of the outer box body is provided with a double-channel sealing structure; the assembling end cover and the outer box body adopt an embedded sealing structure; the disposable sealing end cover and the inner sealing ring are arranged on the assembling end cover and are used for sealing a gap between a cable ring surface and the relevant cooperation surface of the assembling end cover; the outer box body is provided with a sealant injection pipe and a vent pipe; and the cable is completely covered with a cable fire protection wrapping tape after the cable is connected by the intermediate head, and is arranged in the outer box body, and fire protection sealant is injected into the outer box body through a sealant injection pipe. On an aspect of operation, firstly, carbon dioxide or nitrogen is used for discharging air in the outer box body, and then, the fire protection sealant is injected into the outer box body to carry out high-pressure sizing. The fire and explosion protection structure carries out pressure maintaining sizing on the fire protection sealant through the outer box body to realize the sealing protection of the cable head, a compact filling layer can be formed on the periphery of the intermediate head, the defect of poor fire protection performance durability and reliability is eliminated, and the fire and explosion protection structure is low in cost and is favorable for popularization.

The invention discloses an optical fiber airtightly leading out method for a GIS cavity, and provides a scheme for leading out a tail fiber of an optical element in GIS application. In the scheme, the tail fiber of the optical element in the GIS cavity is subjected to metal packaging, and a metal packaging structure comprises a metal optical fiber, a metal pipe and the like; the metal pipe passes through optical fiber through holes on a mounting flange and an optical fiber leading out flange positioned on the GIS cavity in turn, and the optical fiber through holes are sealed and cured by epoxy resin glue; and the tail fiber leading out parts of the metal optical fiber and the metal pipe are provided with protective devices additionally. In the method, the metal optical fiber packaging technology is applied to the optical element in the GIS cavity of a power system for the first time, the airtightness problem generated when the optical fiber of the GIS cavity is led out is effectively solved, stress applied to the optical fiber is reduced, the balance of the stress of the optical fiber is ensured, the pressive strength and the insulating property of the GIS system are ensured, and the reliability of the GIS system is improved.

The invention discloses a push-type multifunctional overflow-preventing fuel gas safety valve. The valve comprises a valve casing and a valve joint, wherein the valve casing is made of a non-magnetized material; a magnetic core controller is arranged outside the valve casing; a magnetic core is arranged in a valve cavity; the valve joint is connected to the gas inlet end of the valve casing; the internal cavity of the valve joint is provided with an ultra-flow protective valve for controlling the on-off state of gas flow at the gas inlet end of the valve cavity; the ultra-flow protective valve is provided with a sealing piece for controlling the on-off state of the gas flow; and the sealing piece is provided with a head part which protrudes outward. The push-type multifunctional overflow-preventing fuel gas safety valve is characterized in that: a return magnetic ring is also arranged in the valve cavity and can be controlled by the magnetic pole of the magnetic core controller to move and push the head part of the sealing piece which is in a closed state, so that the ultra-flow protective valve is opened. The push-type multifunctional overflow-preventing fuel gas safety valve has the advantages of capability of causing the return magnetic ring to act by the manual magnetic core controller so as to remove the overflow protection state of the ultra-flow protective valve, fast and accurate return, safe use and high durability.

The invention relates to the technical field of carton printing, in particular to a corrugated paper printing process for fruit packaging boxes. The corrugated paper printing process comprises seven steps of corrugated paper pretreatment, flexographic plate making, corrugated paper surface treatment, corrugated paper PE lamination, outer layer PE lamination surface treatment, flexographic plate printing and polishing and calendaring treatment. The adhesive force between PE lamination and corrugated paper is enhanced through corona treatment, and then a water-based ink and the PE lamination areeffectively combined through low-temperature plasma treatment, so that the combination fastness of an ink layer is improved, and the sealing performance and the moisture resistance of the corrugatedpaper are better through PE lamination; compared with solvent-based ink, the water-based ink does not generate harmful gas, is higher in safety performance, and is cheaper than UV ink, the toughness of a film formed by the water-based ink adapts to that of PE lamination, the brittle fracture phenomenon is avoided, and the defect that the film formed by the UV ink is prone to brittle fracture is overcome.

The present invention provides a waste toner collecting container which is used in a color image forming apparatus. The container can be removed from the image forming apparatus and stores waste toner which have not been transferred to recording paper and have been collected. The collecting container is constructed such that an air sealing member is disposed at the coupling between the waste toner collecting container and a conveying member for conveying the collected waste toner into the waste toner collecting container. The air sealing member can prevent the waste toner from seeping out at the coupling when the waste toner is conveyed and to seal the collecting port so that no waste toner will spill out from the waste toner collecting container which has been removed for replacement after the waste toner collected and conveyed therein has reached the predetermined amount.

The invention discloses a dry-type oxidation reactor for detecting total organic carbon. The dry-type oxidation reactor comprises a sample feeding unit and a burning unit. An air inlet in the sample feeding unit is arranged nearby a burning pipe in the burning unit, an air-tight component is arranged on the periphery of an inlet of the burning pipe and butts against the bottom of a sliding block in the sample feeding unit. Under the effect of a photoelectric sensor, a driving device drives the sliding block to generate two limiting positions, at one limiting position, an injection hole penetrating through the sliding block is arranged at the inlet of the burning pipe and connected with the inlet, and at the other limiting position, other bottoms of the sliding block seal the inlet of the burning pipe. The dry-type oxidation reactor solves the problem of poor air-tightness of a traditional oxidation reactor.

The invention relates to a flying dust concentration detection device and flying dust detection method based on deep learning, belongs to the technical field of air quality detectors, and solves the problems of flying dust concentration detection cost, long recognition time and poor measurement effect in the prior art. The invention comprises an air collection device, an air transmission device,n a paper feeding device and a measuring device. The method comprises the following steps: the air collection device acquires real-time sample air collected in a detection field environment; the air transmission device is used for internally transmitting the sample air through a negative pressure machine; the paper feeding device automatically replaces background paper used for shooting after shooting is completed, and the measuring device detects an object through an artificial neural network after shooting sample gas. The sizes of the flying dust particles can be effectively detected, thedifferent particles are recognized and detected by means of a deep learning algorithm of target detection, and the concentrations of the different particles in the flying dust can be accurately detected in real time.

The invention discloses a fireproof and explosion-proof structure at the intermediate joint of a cable and an installation and application method thereof, and belongs to the technical field of cable joint fire and explosion prevention. The fireproof and explosion-proof structure comprises an outer box body, an assembling end cover, a sealing end cover and a sealing ring, wherein the longitudinal assembling surface of the outer box body is provided with a dual-sealing structure; the assembling end cover adopts an embedded sealing structure with the outer box body; the sealing end cover and the sealing ring are arranged on the assembling end cover for sealing a gap between a cable ring surface and a related matching surface of the assembling end cover; the outer box body is provided with a glue injecting pipe and an exhaust pipe; the cable is completely wrapped by a cable fireproof wrapping tape after being connected by the intermediate joint, and the cable is placed in the outer box body; and a fireproof sealing glue is injected into the outer box body through the glue injecting pipe. Operationally, firstly air inside the outer box body is exhausted out by using carbon dioxide or nitrogen, and then the fireproof sealing glue is injected inwards for carrying out high pressure shaping. The outer box body is used for carrying out pressure maintaining shaping on the fireproof sealing glue to realize sealing protection for the joint of the cable, and a compact filling layer can be formed on the periphery of the intermediate joint, so that the defect that the enduring stability of fireproof performance is poor is solved, the manufacturing cost is low, and the structure is beneficial for popularization.

The present invention provides a regeneration method of an ink jet printer ink box, which aims at a waste ink box which takes a spring and an airbag as a subpressure regulator structure. A splicing does is smeared around a cover of the ink box and then is solidified by illuminating; or the splicing does is smeared around the air holes at the bottom of the ink box and is plastered with the relative film and then solidified by illuminating. A pylome is opened on the box cover and the box body through which the cleaning liquid is injected and an ink storage and an ink supply road are cleaned in the way. So that the closure performance of the air holes of the regenerated ink box cover and the closing film are improved; the damage to the subpressure regulator structure is avoided; the original subpressure regulator structure is effectively used and the using cost of the ink box is reduced. The passing rate of the recycling ink box products is over 65 percent.