20results about How to "Barometric balance" patented technology

This invention relates to the field of aero-engine bearing testing technology, and discloses a bearing testing device, including a main shaft, a test bearing assembly, a sealing structure, and a maintenance assembly. The test bearing assembly includes a first bearing housing and a test bearing. The first bearing housing has a first air inlet. The adjusting ring of the maintenance assembly has a first end and a second end. An oil injection ring is spaced apart from the second end to form a sealing channel. A stationary ring is connected to the oil injection ring and positioned close to the second end. The first air bleed channel of the oil injection ring communicates with the second air bleed channel, and the first air bleed channel communicates with the first air inlet. The other end of the second air bleed channel communicates with the sealing channel. This invention, through the spaced arrangement of the rotating and stationary rings and the airflow guidance of the sealing channel, introduces high-temperature gas through the first air inlet of the first bearing housing and guides it into the sealing channel, recreating a real sealing scenario. This makes the bearing test verification more comprehensive and closely resembles the actual working condition, significantly improving the reference value of the test data.

The invention discloses an air pressure balance glass door structure for a commercial refrigerator and the commercial refrigerator, and relates to the technical field of refrigeration equipment.The glass door structure comprises double-layer glass, a door frame, a door sealing strip and an embedded door handle, the door frame is arranged on the periphery of the double-layer glass in a surrounding mode, and the door frame comprises a first door frame strip; the first door frame strip is hollow to form a closed air guide cavity, a door handle is embedded in the outer side face of the first door frame strip, the bottom of the door handle is provided with a hollowed-out part communicated with the air guide cavity and an inner turning plate for blocking the hollowed-out part, and the inner turning plate is only opened towards the air guide cavity so as to enable the outside to be communicated with the air guide cavity; second vent holes communicated with the air guide cavity and the interior of the refrigerator are formed in the side face, close to the refrigerator, of the first door frame strip, and the door sealing strip is arranged on the side face, close to the refrigerator, of the door frame strip and provided with a first soft edge which elastically extrudes and blocks the second vent holes. The invention is particularly suitable for a door body of a vertical commercial refrigerator with hollow glass, and air pressure inside and outside the refrigerator can be quickly balanced.

The invention discloses a concrete precast beam solar curing shed and a curing control method thereof, and relates to the technical field of concrete curing, the concrete precast beam solar curing shed comprises a curing shed main body, the curing shed main body is composed of a shed frame and a first tarpaulin, a second tarpaulin is arranged on the outer side of the first tarpaulin, and an air chamber is formed between the second tarpaulin and the first tarpaulin; a solar panel is arranged at the top of the shed frame and electrically connected with a storage battery, a plurality of first ventilation pipes are arranged in the first awning cloth and connected with an air heater, the solar panel, the storage battery and the air heater are all located outside the second awning cloth, and the air heater is electrically connected with the storage battery. A high-temperature and high-humidity environment is formed by continuously introducing humid and hot air and cooperating with the spraying assembly, and a heat preservation layer is formed in the curing shed by introducing hot air into the air chamber, so that external cold air is prevented from invading.

This invention relates to an electronic expansion valve, comprising a drive assembly, a screw, a valve needle, a valve seat, a bearing, and a valve needle spring. The valve seat has a fluid passage. The drive assembly drives the screw to rotate and move axially. The valve needle has an axial mounting hole inside, and its upper part has a bearing cavity to accommodate the bearing. The lower end of the screw extends into the axial mounting hole and is rotatably connected to the bearing, allowing for axial sliding. A screw retaining ring is provided at its lower end, and a screw annular protrusion is provided on its outer periphery. The valve needle spring is sleeved on the screw and confined between the screw annular protrusion and the upper end face of the valve needle. Downward movement of the screw compresses the valve needle spring through the screw annular protrusion, pushing the valve needle downward. Upward movement of the screw pushes the valve needle upward through the screw retaining ring against the bearing, thereby achieving stable axial movement of the valve needle to precisely control the opening and closing of the fluid passage. This structure achieves pure axial transmission through the bearing, effectively preventing the valve needle from rotating and vibrating with the screw. The compact layout of the valve needle spring significantly shortens the axial dimension of the valve body, improving transmission reliability and service life.

The application provides an electronic heating atomization unit and device with a ventilation micro-groove structure. The electronic heating atomization unit comprises a main body, a first sealing member and an atomization core. The main body comprises a base and a protruding part arranged on the main body. The protruding part is provided with a protruding part ventilation hole for communication between the inside and the outside. The first sealing member is arranged at one end of the protruding part provided with the protruding part ventilation hole. A ventilation micro-groove structure is arranged between the first sealing member and the protruding part for guiding airflow from the outside of the protruding part to the protruding part ventilation hole. The electronic heating atomization device comprises a shell and the electronic heating atomization unit. The electronic heating atomization unit and device have simple structure and are convenient to assemble, and the sealing required between parts is reduced. Through the cooperation of the protruding part of the main body and the first sealing member and the ventilation micro-groove structure, sealing is realized while the liquid storage bin ventilation function is considered, and the stability of liquid supply to the atomization core is ensured.

This utility model provides a handle structure and its refrigeration device, which is set on the opening side of the refrigeration device door. The refrigeration device includes a door and a housing. The edge of the door is provided with a door seal. The handle is characterized by including an outer handle and an inner handle. The outer handle is fixedly connected to the door. The inner handle includes a connecting rod, an inner handle frame, and a partition. The connecting rod has a scissor-fork structure with a short lever arm and a long lever arm. A strip-shaped connecting hole is provided at the intersection of the connecting rods. A hinge pin is provided in the strip-shaped connecting hole and is slidably hinged to the connecting rod. The hinge pin is located on the side wall of the door. The inner handle frame is located inside the outer handle and is hinged to the long lever arm side of the connecting rod. The partition is located between the door seal and the housing. The connecting rod transmits the pulling force of opening the door to the partition, separating the door seal from the housing to create an opening so that some air can enter the housing from the opening, thereby balancing the air pressure inside and outside the housing. This handle makes opening the door easier.

The invention discloses a sound-insulation breathable earplug based on an acoustic labyrinth, and relates to the technical field of earplugs, the sound-insulation breathable earplug comprises a skeleton, and one end of the skeleton is internally provided with a through air guide groove; an acoustic maze is arranged in the other end of the framework, an acoustic maze outlet is formed in the side, facing the air guide groove, of the acoustic maze, the acoustic maze outlet is communicated with the air guide groove, and an acoustic maze inlet is formed in the side, deviating from the air guide groove, of the acoustic maze; labyrinth cavities which are nested layer by layer are arranged in the acoustic labyrinth, and the acoustic labyrinth inlet is communicated with the acoustic labyrinth outlet through the labyrinth cavities. According to the invention, the two sides of the earplug are communicated by means of the labyrinth cavity, so that the earplug has good air permeability and is more comfortable to wear; meanwhile, through the synergistic effect of three mechanisms of thermal viscosity sound loss, sound wave reflection and resonance sound absorption, ultra-wide-band sound insulation is achieved, the sound transmission loss is improved, and the sound insulation effect is enhanced.

This utility model discloses a nano-coating atomization device for automotive headlight coating, comprising a material tank, a liquid pump, and a double-layer cylinder. The upper surface of the material tank is provided with an ultrasonic disperser, a pressure relief pipe, and an air inlet. The liquid pump is installed on the side of the material tank and communicates with it. The outlet of the liquid pump is connected to an ultrasonic nozzle. The double-layer cylinder is screwed to the ultrasonic nozzle. The lower surface of the double-layer cylinder is provided with several trapezoidal spray holes arranged in a ring. After the liquid pump draws the material, it is sent to the ultrasonic nozzle, which atomizes and sprays the material. The air inlet provides compressed air to the double-layer cylinder. The compressed air is sprayed out from the trapezoidal spray holes to form an annular air curtain. The airflow carries the material to the surface of the headlight, reducing material dispersion and improving the efficiency of headlight coating.

The application discloses a multi-outer shape adaptive outward opening manned spacecraft cabin door device, and belongs to the technical field of manned spacecraft cabin doors. The cabin door device comprises a door frame structure, a door body structure, a door shaft hinge mechanism and a repeated locking mechanism. The door frame structure is arranged on the outer circumferential surface of a cabin body. The door body structure is hinged to the door frame structure through the door shaft hinge mechanism. The repeated locking mechanism is a single-drive multi-latch pin linkage spatial linkage mechanism arranged on the inner surface of the door body structure through a support. After the door body structure is closed inward relative to the door frame structure, the multiple latch pins in the repeated locking mechanism can abut against the inner surface of the door frame structure, and the door body structure can compress an elastic sealing element to realize sealing at the contact position of the door frame structure and the door body structure. The cabin door device makes the transmission efficiency of each compression point close, is beneficial to uniform application of locking load, and is simple and convenient to operate in unlocking and locking, and is beneficial to opening of the cabin door in a short time.

This application provides a fuel tank system, a vehicle, and a control method for the fuel tank system, relating to the field of vehicle technology, for preventing liquid fuel from entering the carbon canister due to overfilling during vehicle refueling. The fuel tank system includes: a fuel tank 101; a fuel pump 102, located within the fuel tank 101, including a fuel level gauge 103; a carbon canister 104, the air inlet of which is connected to the exhaust port of the fuel tank 101 via a pipeline, for adsorbing fuel vapor in the exhaust gas from the fuel tank 101; a shut-off valve 105, located at the exhaust port of the carbon canister 104, for controlling the opening or closing of the exhaust port of the carbon canister 104; and a controller, electrically connected to the fuel level gauge 103 and the shut-off valve 105, configured to: obtain the fuel level in the fuel tank 101 through the fuel level gauge 103; and, after the fuel level in the fuel tank 101 reaches a preset fuel level, control the shut-off valve 105 to close the exhaust port of the carbon canister 104.

This utility model discloses an atomizing device and atomizing equipment. The atomizing device includes: a chamber with an open lower end; a sealing seat that surrounds the chamber to form an oil storage cavity, and the sealing seat has an installation hole; a pressure relief component installed in the installation hole, the pressure relief component forming an air passage, an insertion hole, and a pressure relief air passage communicating with the outside of the air passage and the sealing seat respectively, the width of the pressure relief air passage being 0.2~0.6mm and the cross-sectional area being 0.04~0.36mm²; an exhaust pipe with its lower end inserted into the insertion hole; and an elastic seal installed at the upper end of the exhaust pipe, the elastic seal having a slit corresponding to the upper end of the exhaust pipe, so that when the air pressure in the oil storage cavity is higher than that outside, the gas in the oil storage cavity causes the slit to widen, and the gas is discharged from the oil storage cavity through the slit, the inside of the exhaust pipe, the air passage, and the pressure relief air passage in sequence. This technical solution achieves pressure relief of the oil storage cavity, realizes air pressure balance, and prevents excessive oil from seeping out of the oil storage cavity from the oil inlet hole into the atomizing cavity and then leaking out from the nozzle.

The utility model relates to the technical field of chemical equipment, and discloses a vacuum degasser with automatic sealing, which comprises an equipment box and a degassing tank, the bottom end of the outer wall of the degassing tank is fixedly connected with a servo motor, the output end of the servo motor is fixedly connected with a rotating shaft, the top end of the rotating shaft is fixedly connected with an electric push rod, and the electric push rod is fixedly connected with a vacuum pump. The device comprises an electric push rod, a brush handle is fixedly connected to the top end of the electric push rod, sliding grooves are formed in the left side and the right side of the brush handle correspondingly, a plurality of springs are fixedly connected to the inner walls of the two sliding grooves correspondingly, cleaning brushes are slidably connected to the inner walls of the two sliding grooves correspondingly, and a plurality of limiting blocks are fixedly connected to the inner walls of the two sliding grooves correspondingly. According to the degassing tank cleaning device, the pressure of clean water is increased through the pressure pump, the inner wall of the degassing tank is primarily washed through the rotary spray head, and then the inner wall of the degassing tank is continuously cleaned through the cleaning brush by matching the servo motor with the spring, so that the cooperation of high-pressure water and mechanical scrubbing is realized, and the inner wall of the degassing tank is ensured to be thoroughly cleaned.

The utility model discloses a cup cover and cup, the cup cover includes the cover body, has the through -hole on it, the pipe body passes through the through -hole and with the cover body sliding cooperation, and the pipe body is equipped with the elastic member on, the plug piece is used for sealing the pipe body, the unlocking piece is located on the cover body, the pipe body is in the open state when the cup cover is in the initial state, and the end portion is located the cover body outside, the pipe body end portion is sealed and is located the cover body in when the cup cover is in the closed state, the plug piece is locked through the unlocking piece, the unlocking piece releases the plug piece and locks when the cup cover is in the open state, the elastic member restores the pipe body to the initial state, the utility model discloses the pipe body is set into with the cover body sliding cooperation, and the use is cooperated the elastic member, when drinking water, the unlocking piece is stirred, makes the pipe body whole movement and pops out a distance outward, avoids the damage to the pipe body, has improved the life.

The utility model discloses a kind of anti scalding double-layer PET milk tea cups, it is related to water cup technical field, including cup body, the cup body upper end is provided with cup cover;The cup body adopts double-layer setting, including outer wall, inner wall, cavity is arranged between outer wall and inner wall;The outer wall adopts PET material, the inner wall adopts modified PCT material;The inner wall upper end edge forms cup mouth ring, the cup mouth ring lower end is provided with connecting groove;The outer wall upper end is connected with connecting ring, the connecting ring is located in connecting groove, and both are connected by high-temperature-resistant sealant;Paste formula thermometer is provided in the cavity.The utility model design structure is reasonable, it passes through and adopts double-layer cup body structure, outer wall adopts PET material, inner wall adopts modified PCT material, cavity is set in the middle, can effectively block heat transfer, play good anti scalding effect, while inner wall modified PCT high-temperature-resistant characteristic, avoid the risk of harmful substance migration caused by PET directly contact high-temperature beverage.

This application discloses an atomizing component and an atomizer. The atomizing component has a liquid storage chamber inside. The atomizing component includes: an outer shell, which defines a receiving cavity in the height direction. The outer shell has a liquid guiding channel extending downward in the height direction and communicating with the receiving cavity. The opening of the liquid guiding channel at the liquid inlet end is larger than the opening of the liquid outlet end. An inner shell, which defines an atomizing chamber inside, is at least partially disposed in the receiving cavity. The outer wall of the inner shell and the inner wall of the outer shell are connected on the side near the liquid inlet end to form the top of the liquid storage chamber. The inner shell has a liquid inlet communicating with the liquid storage chamber. A heating element is disposed in the atomizing chamber to heat the liquid matrix entering the atomizing chamber to generate an aerosol.

The application provides an underwater hydraulic hoist, which comprises a hydraulic cylinder, a piston rod and a power assembly, the piston rod extends out of the hydraulic cylinder to form an outer acting part, further comprises a flexible protection assembly and a filter assembly, the flexible protection assembly, the hydraulic cylinder and the outer acting part are sealingly connected to form a flexible bin, and the flexible bin is in communication with the filter assembly. The filter assembly comprises a filter, the filtering-out end of the filter is sealingly connected with the flexible bin, and a check valve is arranged at the filtering-in end. A breathing pipe is arranged in a cable assembly. The underwater hydraulic hoist provided by the application can ensure that the outer acting part of the piston rod is separated from the external dirty water body through the flexible protection assembly and the filter assembly, and prevent the piston rod from being damaged or leaking due to scaling and the like. The application has the advantages of simple structure, reliable operation, convenient installation and the like.

This application relates to the field of medical care and discloses an intelligent pneumatic positioning care system. This system enables elderly individuals to safely transition from a lying to a sitting position without changing their existing bed, providing ample lateral support throughout the process to prevent rollover or falls. The system includes: a wedge-shaped main air cushion, used to elevate the upper body from a lying to a sitting position after inflation; two side air cushions, respectively located on both sides of the main air cushion's upper surface, used to provide lateral support after inflation; and a one-way valve with an opening pressure, located between the side air cushions and the main air cushion. When the pressure difference between the side air cushions and the main air cushion is greater than the opening pressure, the one-way valve opens, allowing gas from the side air cushions to enter the main air cushion; when the pressure difference is less than the opening pressure, the one-way valve closes, cutting off the gas connection between the side air cushions and the main air cushion.

The utility model belongs to float glass technical field especially relates to a glass forming tin groove and float glass preparation system. Glass forming tin groove includes: tin groove shell, has the forming groove, glass flows into the forming groove in one end of tin groove shell, and flows out the forming groove in the other end of tin groove shell, the forming groove has first temperature area, second temperature area and third temperature area, first temperature area, second temperature area and third temperature area are sequentially arranged along the flowing direction of glass, and the temperature of first temperature area, the temperature of second temperature area and the temperature of third temperature area are sequentially reduced, and gas control structure includes a plurality of diffusion tubes, each diffusion tube is connected tin groove shell and communicates the forming groove, first temperature area, second temperature area and third temperature area all at least arrange one diffusion tube. The utility model can prevent the glass defect caused by the pollutant accumulation in the low temperature area, and improve the forming quality of glass ribbon.

The utility model belongs to the technical field of greenhouse temperature control devices, and particularly discloses an automatic temperature control device for a greenhouse, which comprises a greenhouse, the greenhouse is composed of a north wall, side walls, a steel frame and plastic cloth covering the steel frame, the lower portions of the north wall and the steel frame are fixedly connected with a plurality of temperature control pipes, and the temperature control pipes are connected with the side walls. A plurality of air holes are formed in the temperature control pipe, a heating box is arranged in the greenhouse, an air outlet of the heating box is communicated with one end of the temperature control pipe through a first hose, a fan is arranged on the air outlet, the other end of the temperature control pipe is communicated with an induced draft fan through a second hose, the induced draft fan is fixedly connected with the side wall, and an air outlet channel extends out of the side wall. A ventilation window is formed in the other side wall, a plurality of thermometers are fixedly connected in the greenhouse, and electromagnetic valves are arranged on the first hose and the second hose. The temperature control pipe is arranged, the heating device is arranged at one end of the temperature control pipe, the induced draft fan is arranged at the other end of the temperature control pipe, equipment is simple, the air holes are formed in the temperature control pipe, and cooling and heating are achieved.