47results about How to "Reduces the possibility of "air leaks"" patented technology

A glass sintered high temperature and high pressure sealing electric connector comprises conductor pins (11) used for transmitting currents, wherein a glass insulator (12) and a ceramic insulator (13) wrap each conductor pin (11), a metal outer shell (14) is arranged on the peripheries of the glass insulators (12) and on the peripheries of the ceramic insulators (13), the conductor pins (11), the glass insulators (12), the ceramic insulators (13) and the metal outer shell (14) are combined into a whole through the glass sintering process. The conductor pins (11) are made of expansion alloy, the glass insulators (12) are made of electronic seal glass, and the metal outer shell (14) is made of nickel-based superalloy. According to the electric sealing connector, pressure can be more easily produced between glass and a substrate, the micro combination degree of sealing between glass and metal is improved, and accordingly the probability that air leakage occurs in the sintering process or in the use process is greatly lowered.

The invention provides a multilayer negative-pressure closed drainage wound protecting device which comprises a porous foam cushion, a drainage tube and an oxygen-containing liquid flushing tube. One end of the drainage tube is positioned in the porous foam cushion, the porous foam cushion is a multilayer composite foam cushion and comprises a negative pressure conducting layer and a drainage protecting layer, the negative pressure conducting layer is a hydrophobic porous foam material layer, the drainage protecting layer is a hydrophilic porous foam material layer, and the drainage tube is disposed in the negative pressure conducting layer; the oxygen-containing flushing tube and the drainage tube enter the porous foam cushion side by side, the drainage tube penetrates the porous foam material layer to be positioned on the lower surface of the drainage protecting layer, the tail end of the drainage tube goes deeply into the drainage protecting layer for positioning, and small holes are distributed in the wall of the drainage tube. The drainage tube and a leading-in end of the oxygen-containing liquid flushing tube are fixed by a shared elastic sealing glue film floppy which comprises a disc and an elastic sealing glue film bonded with the disc and extending outwards, and a drainage leading-in tube orifice of the drainage tube and a flushing leading-in tube orifice of the oxygen-containing liquid flushing tube are arranged in the middle of the disc. A longitudinal breaking joint is formed at a drainage tube incoming end of the porous foam cushion, so that convenience is brought to overturning of the leading-in tube orifice.

The invention relates to a preparation method of a bipolar plate for optimizing drainage capacity of a fuel cell, the surface of an arc groove part of the bipolar plate is a hydrophobic surface, the surface of a ridge part is a hydrophilic surface, and the preparation method comprises the following steps of: firstly carrying out hydrophilic treatment on the surface of the bipolar plate and then carrying out hydrophobic treatment on the arc groove part of the bipolar plate; the hydrophobic treatment method comprises the following steps: combining the bipolar plate and a partition plate into a pseudo-primary battery, and assembling a plurality of pseudo-primary batteries assembled in this way into a filling pseudo-stack; introducing a water repellent agent into a hydrogen cavity and an air cavity which are assembled into a filling false pile for circulation, then discharging the water repellent agent, and purging the two cavities; disassembling the filling false pile, taking out the bipolar plate, and sintering or curing the bipolar plate. The method has the beneficial effects of improving the corrosion resistance and prolonging the service life of the bipolar plate. The method is simple and low in cost; and the drainage performance is improved, and the consistency of the galvanic pile is improved.

The invention provides a medical vacuum sealing drainage device, which comprises a porous foam soft pad and a drainage tube which is arranged in the porous foam soft pad and of which the tail end extends out of the outer side of the porous foam soft pad, wherein an elastic sealing adhesive film extending out of a tube system is arranged on the outer side of the porous foam soft pad; a sealing opening out of which the tube system extends is formed on the elastic sealing adhesive film, and the diameter D of the opening part of the sealing opening is less than the outer diameter of a corresponding extending tube; a plurality of small holes are formed on the side wall of the drainage tube; when multiple drainage tubes are arranged, tail ends of the drainage tubes are connected with a multi-ported joint; a flushing tube is arranged in the drainage tube, one end of the flushing tube extends into the drainage tube, and the other end of the flushing tube is led out from the side wall of the tail end of the drainage tube; a sealing cover is arranged at the tail end of the flushing tube; and the sealing opening out of which the tube system extends on the elastic sealing adhesive film is a circular hole or a tubular hole, and preferably the tubular hole is in an inversed horn shape. The medical vacuum sealing drainage device solves the problems of air leakage of extending parts in the tube system of the vacuum sealing drainage device and sealing serving as the key technology in the vacuum drainage technology completely, and is convenient to operate.

The invention relates to an atmospheric-pressure plasma generation device. The atmospheric-pressure plasma generation device comprises a shell, grounding electrode parts, an insulating part, a segmented radio-frequency electrode, and a power supply part, wherein the grounding electrode parts are combined with the lower part of the shell, the lower parts of the grounding electrode parts are provided with plasma discharge ports; the insulating part is combined between the shell and the grounding electrode parts; the segmented radio-frequency electrode is combined with the lower part of the insulating part, is separated from the grounding electrode parts and forms a discharge space between the grounding electrode parts; and the power supply part is used for supplying power to the segmented radio-frequency electrode. The segmented radio-frequency electrode is cylinder and is arranged on the upper parts of the discharge ports; and discharge faces of the grounding electrode parts are rectangular, are adjacently opposite to the segmented radio-frequency electrode and form the discharge space, gas supplied by the upper part of the discharge space discharges in the discharge space defined by the arc-shaped segmented radio-frequency electrode and the rectangular discharge faces, and plasma is injected through the discharge ports.

The invention discloses an air tightness detection device for an inflatable shaft rubber tube. The air tightness detection device comprises a workbench, a bottom frame, a sliding groove, a clamping sliding block, a clamping head, a limiting expansion sleeve, an inflation device and an air pressure detection device, and compared with the prior art, the air tightness detection device is simple in structure, reasonable in design, capable of detecting air tightness of various inflatable shaft rubber tubes with different diameters and lengths, high in detection precision, easy to detect and operateand worthy of popularization.

The invention provides a safety protection device for a natural gas booster station pipeline for preventing pipeline flange leakage, and relates to the technical field of safety of natural gas pipelines. The safety protection device for the natural gas booster station pipeline comprises a left pipeline and a right pipeline, the left pipeline and the right pipeline are connected through a flange, afirst protective cover is arranged outside the flange in a sleeved mode, and the two ends of the first protective cover are in sealing connection with the outer wall of the left pipeline and the outer wall of the right pipeline respectively to form a first gas storage cavity; and vibration damping devices are arranged between the outer wall of the left pipeline and the inner wall of the first protective cover and between the outer wall of the right pipeline and the inner wall of the first protective cover respectively. The protective device can prolong the service life of a flange connectingpiece, so that the possibility of air leakage between the flanges is reduced, and the safety performance of the booster station pipeline is improved.

The present invention discloses a production process and a storage process of a Rizhuhong black tea. The production process comprises fresh leaf spreading, withering, rolling, fermenting, primary drying, shaping with a frying pot, primary baking, and secondary baking. The storage process comprises: equally dividing black tea; wrapping a layer of a film outside the packaged tea leaf; coating a layer of a quicklime glue outside the film; wrapping a layer of a film after drying the quicklime glue; and storing the obtained tea bag in a cooling cabinet with a temperature of 0-5 DEG C. According to the present invention, the improvement is performed on the basis of the traditional black tea production process, the shaping with the frying pot is added, and other traditional processes are improved, such that the produced black tea has characteristics of coiling, black and moistening shape, fresh and moistening taste, sweet and lasting aroma, good infusion resistance, red color, and sweet and mellow taste; and the two technologies such as cold preservation and storage with lime are combined, such that the black tea can be stored for a long time while no deterioration is generated, the aroma of the black tea can be stored for a long time, and the possibility of gas leakage is extremely low.

The invention relates to a storage unit and a refrigeration appliance with the same. The storage unit (7) comprises a main body (8) and a drawer type door (10), wherein the main body (8) defines a storage room (15); and the drawer type door is used for selectively opening or closing the storage room (15) and can slosh in a sloshing range in the process that the door (10) is pushed toward the body (8) to close the storage room (15). The storage unit is characterized by comprising positioning mechanisms (51, 52), wherein the positioning mechanisms are used for positioning the door (10) in a fixed position or a fixed range smaller than the sloshing range when the door (10) is closed.

The invention provides a gas tightness detecting device that is assembled to an open end of a workpiece directly to form sealed space, thereby detecting the overall gas tightness. The gas tightness detecting device comprising a mounting seat and an interface valve is fixedly connected to an open end of a semi-sealed workpiece by the mounting seat and is connected to the peripheral wall of the workpiece detachably and correspondingly. According to the invention, the high-precision gas tightness detecting device is operated to measure the pressure drop of a product cavity within specified time to detect whether the gas tightness is qualified without the need to immerse the product in water, so that the operation is simplified and the detection cost is lowered. The gas tightness detecting device can be assembled to an open end of a workpiece directly to form sealed space, thereby forming a part of a sealed cavity of a to-be-detected product, so that the interface gas tightness is detected, the wearing situation can be discovered conveniently, and the maintenance can be carried out timely.

An overhead garage door opening and closing system for a building structure having a track system comprising a pair of spaced apart tracks; a plurality of hinged door panels hingedly connected together to form the door; a plurality of track wheel assemblies disposed at said door panels, wherein each of said plurality of track wheel assembly comprises a shaft and a wheel rotatably mounted at said shaft and rotatable about an axis of rotation of said wheel, and wherein said door panels move along said tracks via rolling engagement of said wheels of said track wheel assemblies with said tracks as said door panels move between an opened position and a closed position; wherein said track wheel assemblies, when disposed at said door panels, are configured to allow for movement of the respective door panel relative to said wheels in a direction generally normal to said axes of rotation of said wheels and generally normal to a direction of travel of said wheels along said tracks; a door moving assembly that functions to move each of said door panels toward the building structure when the door is moved toward and to its closed position; and wherein, when said door moving assembly moves said door panels toward the building structure as the door closes, said door panels move relative to said wheels and toward the building structure and away from said axes of rotation and said wheels at said track.

The invention discloses a novel stainless steel surface polishing technology, and belongs to the technical field of stainless steel processing. According to the scheme, fine polishing is performed ona stainless steel plate through a negative-pressure type cloth wheel, heat produced by friction during polishing is transmitted into a solution chamber, meanwhile, a redirection rotating ball rotatesanticlockwise to communicate with an epitaxial duct, carbon dioxide contained in a carbon dioxide aqueous solution is prompted to escape, sequentially penetrates through a gas-permeable membrane, a gas outlet hole, the epitaxial duct, the redirection rotating ball, a shunting hole and a gas inlet hole and then enters an air chamber, with continuous flowing of the carbon dioxide, the carbon dioxidecan be forced to flow back to the solution chamber, thus circulating flowing of the carbon dioxide is realized; the pressure during flowing is relatively low, so that the negative pressure is formedon the upper side of the cloth wheel; and under the action of the atmospheric pressure, metal chippings produced during fine polishing are sucked into the cloth wheel upwards, the probability of harmcaused by the metal chippings produced during polishing to the human body is reduced, and meanwhile, the reuse rate of the metal chippings is increased.

The invention provides an efficient evaporator. An efficient distribution measure combining primary distribution with secondary distribution is adopted at a distribution segment to guarantee the sufficient distribution of heavy raffinate at a heating segment; an efficient collection measure is adopted at the outlet of the heating segment to effectively prevent the back mixing of the heavy raffinate; a defoaming structure is adopted at a separation segment to prevent liquid entrainment; and in addition, the design of the entire evaporator can ensure the operation of the equipment in a high vacuum degree, and the used efficient evaporator involves no transmission component and is static equipment, thereby reducing the air leakage possibility of the transmission component, and thus the high vacuum degree of the evaporator is guaranteed.

The invention discloses a three-blocking two-segment type grouting sealing hole pressure measuring structure which comprises a grouting sealing hole pressure measuring structure body (1). A pressure measuring chamber (9) is located at the forefront end of the grouting sealing hole pressure measuring structure body (1). A pressure measuring steel pipe (2) is located in the grouting sealing hole pressure measuring structure body (1) and communicated with the pressure measuring chamber (9). The three-blocking two-segment type grouting sealing hole pressure measuring structure is characterized in that the pressure measuring steel pipe (2) sequentially passes through 1# marithan fixing segments (10), 1# cement fixing segments (5), a 2#marithan fixing segment (12), a 2# cement fixing segment (14) and a 3# marithan fixing segment (13) from interior of the grouting sealing hole pressure measuring structure body (1) to exterior of the grouting sealing hole pressure measuring structure body (1) and is fixed to the middle of the grouting sealing hole pressure measuring structure body (1).

A glass sintered high temperature and high pressure sealing electric connector comprises conductor pins (11) used for transmitting currents, wherein a glass insulator (12) and a ceramic insulator (13) wrap each conductor pin (11), a metal outer shell (14) is arranged on the peripheries of the glass insulators (12) and on the peripheries of the ceramic insulators (13), the conductor pins (11), the glass insulators (12), the ceramic insulators (13) and the metal outer shell (14) are combined into a whole through the glass sintering process. The conductor pins (11) are made of expansion alloy, the glass insulators (12) are made of electronic seal glass, and the metal outer shell (14) is made of nickel-based superalloy. According to the electric sealing connector, pressure can be more easily produced between glass and a substrate, the micro combination degree of sealing between glass and metal is improved, and accordingly the probability that air leakage occurs in the sintering process or in the use process is greatly lowered.

The invention discloses a preparation method for an electric connector, and the method comprises the steps: assembling a metal housing with a sealing connection hole on a sealing connection die, installing a glass insulating tube and a ceramic insulating tube into the sealing connection hole at an interval, and installing conductor pins into the glass insulating tube and the ceramic insulating tube after compression; sealing the assembled structure through a sealing die box body, carrying out the sintering through a high-temperature sintering furnace, and obtaining an initial electric connector after sintering; carrying out the oxide processing of the initial electric connector; pouring high-temperature-resistant insulating glue into the grooves at two ends of the sealing connection hole of the initial connector, carrying out the room temperature solidification, and forming an insulating protection layer. The high-temperature-resistant insulating glue prepared in the invention can achieve the sealing of two ends of the electric connector, thereby preventing the external moisture and impurities from polluting the glass insulating tube and the ceramic insulating tube. Meanwhile, an insulating protection layer formed by the high-temperature-resistant insulating glue is excellent in high-temperature and high-voltage resistance, and is not liable to be aged after long-time use.

The invention discloses a pneumatic grinding pen, comprising a switch group, one end of the switch group is screwed with an air inlet joint, the upper end of the switch group is connected with a switch handle through a rotating shaft, and the other end of the switch group is screwed with a motor tube body , the inside of the motor pipe body is provided with a cylinder motor group, one end of the cylinder motor group is embedded with a positioning pin, one end of the positioning pin is connected to the switch group, and one end of the switch group is screwed with a shaft casing, and the shaft casing One end is embedded with a first bearing, and the other end of the rotating shaft casing is embedded with a fourth bearing matching the first bearing. A rotating shaft is connected between the first bearing and the fourth bearing, and a locking mechanism is provided on one side of the rotating shaft. , the outer side of the locking mechanism is connected with a front-end pipe body, one end of the rotating shaft is screwed with a flat nut, and the other end of the rotating shaft is provided with a mating female head. The internal structure of the present invention is simple, relatively easy to assemble, and convenient for disassembly and maintenance. Maintenance, high machining accuracy.

The invention relates to the field of fuel cells, in particular to a membrane electrode packaging structure and a packaging method. The membrane electrode packaging structure comprises a top surface gas diffusion layer and a bottom surface gas diffusion layer, a frame and a catalyst coating film which are mutually stacked are clamped between the two gas diffusion layers, the catalyst coating filmis bonded and fixed on the top surface of the frame, only one frame is arranged, the part, bonded with the catalyst coating film, of the top surface of the frame is concave, the catalyst coating filmis bonded on the bottom wall of the concave part, and the inner side wall of the concave part blocks the periphery of the catalyst coating film. The packaging structure can reduce the production costand reduce the air leakage risk of the sealing area.

The invention discloses a rapid liquor-water separation device for liquor new-process brewed liquor. The device comprises a steamer, a cover and a knob, wherein a heating base pot is arranged at the bottom of the steamer, the lower position, close to the steamer, of the outer side of the heating base pot is connected with a buffer ring, a support is fixed on the lower side, close to the buffer ring, of the outer side of the heating base pot, a through hole is formed in the bottom of the support, a connecting base is arranged on the outer side of the top of the steamer, a connecting groove is formed in the connecting base, pull rings are arranged at two ends of the top slope of the cover, and the knob is arranged on a third threaded rod. The rapid liquor-water separation device for liquor new-process brewed liquor is provided with a rotating disc, a clamping groove of an extension plate is aligned to the connecting groove of the connecting base, a second threaded rod is rotated to clampa second threaded rod into the clamping groove, the rotating disc is rotated as required, so that the rotating disc presses the extension plate on the cover to tightly fix the cover, the probabilityof air leakage in the edge position of the cover is reduced, and the air tightness of the cover is guaranteed.

The invention discloses a preparation method for an electric connector, and the method comprises the steps: assembling a metal housing with a sealing connection hole on a sealing connection die, installing a glass insulating tube and a ceramic insulating tube into the sealing connection hole at an interval, and installing conductor pins into the glass insulating tube and the ceramic insulating tube after compression; sealing the assembled structure through a sealing die box body, carrying out the sintering through a high-temperature sintering furnace, and obtaining an initial electric connector after sintering; carrying out the oxide processing of the initial electric connector; pouring high-temperature-resistant insulating glue into the grooves at two ends of the sealing connection hole of the initial connector, carrying out the room temperature solidification, and forming an insulating protection layer. The high-temperature-resistant insulating glue prepared in the invention can achieve the sealing of two ends of the electric connector, thereby preventing the external moisture and impurities from polluting the glass insulating tube and the ceramic insulating tube. Meanwhile, an insulating protection layer formed by the high-temperature-resistant insulating glue is excellent in high-temperature and high-voltage resistance, and is not liable to be aged after long-time use.

The invention discloses an intake pressure sensor of a motorcycle, The intake pressure sensor comprises a housing and a cover plate. An object placing cavity with an opened upper end is formed at the housing; and an intake connecting end is arranged at the lower end of the object placing cavity and an inlet hole communicated with the bottom of the object placing cavity is formed in the intake connecting end. The cover plate is arranged at the opening formed in the top of the object placing cavity in a closable and cooperative mode; a baffle plate arranged in a loop mode is formed in the object placing cavity, wherein the baffle plate and the side wall of the object placing cavity are arranged at an equal interval; and a sealed groove is formed between the baffle plate and the side wall of the object placing cavity. The edge of the cover plate extends towards one side to form a protruding edge corresponding to the sealed groove; the protruding edge is inserted into the sealed groove completely; a gap is formed between the end portion of the protruding edge and the bottom of the sealed groove and is filled with an adhesive; and the housing and the cover plate are fixedly connected by the adhesive. According to the invention, the intake pressure sensor has the following advantages: the usage amount of the adhesive can be controlled conveniently; the structure is simple; the assembling efficiency is improved well; the cost is low; the sealing performance of the sensor can be guaranteed; and the measuring precision and reliability are enhanced.

The invention relates to an air-leakage-prevention adjusting valve. The air-leakage-prevention adjusting valve comprises a square pipe body, flange openings are formed in the two ends of the pipe body, connecting holes are formed in the four corners of the flange openings, a rotating plate is mounted in the pipe body, the pipe body is formed by three-time right-angle bending and surrounding of a galvanized sheet, right-angle bending connecting plates are arranged at the two ends of the galvanized sheet, and the two connecting plates are in riveted or welded connection with the side wall of the corresponding pipe body.

The multifunctional surface cleaning machine comprises a machine body and a ground brush pivoted to the bottom end of the machine body, a detachable suction source assembly and a dirt containing barrel are sequentially arranged on the machine body from top to bottom, a positioning part extending outwards is further arranged on the machine body, and a guide convex part attached to the side wall of the suction source assembly is arranged at the lower end of the suction source assembly; the machine body is provided with a guide convex part, the machine body is provided with a guide concave cavity matched with the guide convex part, the machine body is provided with a first limiting surface extending to the positioning part, and the guide concave cavity is formed in the first limiting surface and located above the positioning part. The acting force of a user during use is reduced, the stability of holding the machine body by the user during use is improved, and the use experience is improved; besides, the multifunctional surface cleaning machine not only can clean the ground, but also can collect dust, and is high in assembly efficiency, stable in use, safe and reliable.

The application discloses a frame of a combined air conditioner unit and a column thereof. The column includes a first profile, a second profile, a connection bracket, a heat insulation envelope and a fixed base. The second profile is placed parallel to the first profile and spaced apart from the first profile. The first profile and the second profile are connected through a connecting bracket. The first profile, the second profile and the connecting bracket are connected together to form a hollow tubular member. The interior of the tubular member is filled with thermal insulation material. Two ends of the tubular member are respectively fixed with a thermal insulation envelope. The fixed base is arranged on the top and bottom of the column and connected with the heat insulation envelope. The column of the present application has good heat insulation performance, and realizes the unity of technical indicators such as anti-cold (heat) bridge, air leakage rate, mechanical performance and smooth inner wall of the unit.

The invention discloses a shell for a GIS. The shell comprises a transverse pipe and a vertical pipe, wherein the fracture surface of one end of each of the transverse pipe and the vertical pipe is a 45-degree section; the 45-degree sections of the transverse pipe and the vertical pipe are identically connected with each other and are fixed in a welding manner; and the other ends of the transverse pipe and the vertical pipe are connected with flanges respectively. The shell is formed by butt welding of two aluminum pipes which are integrally molded; the shell is simple in structure, convenient to weld, low in cost, good in sealing effect and applicable to engineering batch production of the GIS; the performance of a product is improved when the cost is saved; the production efficiency is improved; and the market competitiveness is greatly improved.

The invention discloses a stainless steel surface polishing process, which belongs to the technical field of stainless steel processing. In this scheme, a negative pressure cloth wheel is used to finely polish a stainless steel plate, and the heat generated by friction during grinding is transferred to a solution chamber, and at the same time, the turning direction is turned The ball rotates counterclockwise until it communicates with the extension conduit, prompting the carbon dioxide contained in the carbon dioxide aqueous solution to escape, passing through the gas-permeable membrane, the air outlet, the extension conduit, the redirecting ball, the diversion hole and the air inlet in turn, and entering the air chamber. With the continuous flow of carbon dioxide, the carbon dioxide can be forced to return to the solution chamber, so as to realize the circular flow of carbon dioxide. With the help of the low pressure during the flow, a negative pressure is formed on the upper side of the cloth wheel. The metal debris is sucked into the cloth wheel, reducing the possibility of metal debris generated during the polishing process causing harm to the human body, and at the same time improving the recycling rate of metal debris.