609 results about "Air cavity" patented technology

The invention provides a heat dissipation system and energy storage equipment, and belongs to the technical field of heat dissipation. The heat dissipation system comprises a first air duct structure and a second air duct structure, wherein the first air duct structure comprises first air duct paper with a first air cavity, a first air inlet and a first air outlet; the first air cavity is used for accommodating part of a first heating element; the second air duct structure comprises second air duct paper with a second air cavity, a second air inlet and a second air outlet, and the first air duct paper and the second air duct paper are arranged side by side; the second air cavity is used for containing a second heating piece, and the heating value of the second heating piece is smaller than that of the first heating piece. The air inlet fan is arranged at the first air inlet; the reversing fan is arranged at the downstream of the airflow direction of the first air cavity and the upstream of the airflow direction of the second air cavity; and the air outlet fan is arranged at the second air inlet, and the air outlet fan is used for introducing the air flow into the second air cavity and blowing the air flow out through the second air outlet. According to the invention, the uniformity of heat dissipation can be improved, and the aesthetic property of a corresponding product can be improved.

The invention discloses a sealing structure for a test, and an aging test and leakage rate detection method and system. The sealing structure comprises a tested sealing assembly and an air cavity assembly integrated in the tested sealing assembly, and serialized test samples with different filling rates and compression rates are formed by regulating and controlling the groove width and the groove depth of a sealing ring mounting groove so as to simulate various actual sealing states. An aging test adopts a multi-factor coupling accelerated aging method, and a plurality of material characterization means are combined to systematically evaluate the evolution rule of the sealing performance. According to leakage rate detection, static pressure maintaining and dynamic pressure adjusting dual-mode measurement is achieved through an air tightness detector, and the sealing characteristics under different pressure conditions are comprehensively reflected. According to the invention, direct and systematic detection of the leakage rate of the sealing structure is realized, and an innovative solution is provided for sealing performance evaluation and service life prediction of electrical equipment.

The utility model discloses an adjustable air pump which comprises a shell and an air inlet hole pipe arranged in the shell, a plurality of air inlet holes are formed in the pipe wall of the air inlet hole pipe, and the adjustable air pump further comprises an air inlet adjusting sleeve and an adjusting driving device used for driving the air inlet adjusting sleeve to axially move so as to adjust the sizes of the air inlet holes. The air inlet adjusting sleeve is arranged between the air inlet hole pipe and the shell in a sleeved mode. According to the adjustable air pump, the air inlet adjusting sleeve is arranged between the air inlet hole pipe and the air pump shell, and the adjusting driving device is arranged, so that the hole diameters of all the air inlet holes in the air inlet hole pipe can be accurately adjusted on the water surface. On-line adjustment of the aperture of the air inlet hole of the air pump can be achieved in the underwater environment, the tedious operation that the whole air pump needs to be manually disassembled and replaced in a traditional method is effectively avoided, the structural design is simple, operation is convenient and fast, and the working efficiency and economical efficiency are improved.

Disclosed is a method of reducing drag on the hull of the vessel by creating a Coanda flow on the hull by jetting a fluid onto the hull or surface continuous with hull. The fluid is jetted onto the hull or surface continuous with the hull at a location above or below the waterline of the vessel. The fluid is jetted from within a habitat positioned at least partially below the waterline, the habitat being vented to atmosphere. The habitat has an open end below the waterline. The Coanda flow extends entrains air below the waterline and adjacent to the hull. An air cavity or sheet is created by the jetted fluid. A system for reducing drag is also disclosed.

The invention discloses a micro-mixing nozzle integrating heat pipe cooling and heat regeneration and a combustor, the micro-mixing nozzle comprises a heat pipe assembly I, a micro-mixing sleeve, an air mixing module and a fuel pipe, the micro-mixing sleeve, the air mixing module and the fuel pipe are coaxially arranged, and the heat pipe assembly I comprises a heat conduction ring, perforated fins, a heat pipe and heat pipe radiating fins; the overall combustor comprises a fuel cavity, an air cavity and a cooling cavity which are sequentially, coaxially and fixedly arranged at intervals from bottom to top, and a plurality of micro-mixing nozzles which are symmetrically arranged relative to the center of the overall geometric central axis are installed in the air cavity and the cooling cavity. According to the micro-mixing nozzle integrating cooling and backheating of the heat pipe and the combustor, the inlet area of the combustion chamber can be rapidly cooled, the service life of the combustor is prolonged, meanwhile, heat of the inlet area of the combustion chamber can be effectively utilized to preheat air, and the combustion efficiency is improved. The problem that the service life of an existing combustor is short due to thermal damage of a high-temperature backflow area to a micro-mixing nozzle can be solved.

The invention belongs to the technical field of valves, and discloses a single-action pneumatic actuator control system which comprises a gas supply gas circuit, a pneumatic pilot valve, a first electromagnetic valve, a pilot loop and a delayed discharge loop. And the delayed discharge loop is configured to discharge the air pressure in the control air cavity, and after a preset time, the air pressure is gradually reduced to be below a set value so as to cut off the pneumatic pilot valve. During power failure in a whole platform range, the time-delay discharge loop can enable the whole control system to automatically switch into a pure pneumatic time-delay mode, so that the situation that the BDV immediately enters an open state due to power loss of the first electromagnetic valve is avoided, and the environmental adaptability and long-term operation reliability of the control system under extremely severe environments such as an ocean platform and flammable and explosive environments are remarkably improved; the safety performance is improved.

The invention belongs to the technical field of engineering elements, and particularly relates to a valve, in particular to a combination valve and a using method thereof. The combination valve comprises a valve body, an air chamber, a fluid chamber and a valve core, the piston is arranged in the air chamber in a lifting manner; the valve element is arranged at the bottom of the piston and used for opening and closing a flow channel in the valve body; the air inlet pipe is arranged on one side of the valve body and communicates with the air chamber cavity through an air channel; the adjusting assembly is arranged in the air inlet pipe in a sliding manner; when the air inlet pipe conveys compressed air into the air chamber cavity, the compressed air pushes the adjusting assembly to move in the direction of the piston so as to open the air channel. After the valve element closes the flow channel, the air cavity in the outer wall of the adjusting assembly communicates with the air chamber cavity through the air channel; if the air pressure in the air inlet pipe fluctuates, the adjusting assembly slides left and right in the air inlet pipe, and the air cavity is always communicated with the air chamber cavity so that the pressure in the air chamber cavity can be constant.

The utility model discloses a vacuum sealing machine which comprises a base, an air exhaust hole is formed in the base, and the air exhaust hole penetrates through the lower wall of the base. The water tank assembly is located on the upper surface of the base, an air inlet part and an air outlet part are arranged on the water tank assembly, an air inlet channel of the air inlet part is communicated with the air exhaust hole, and the ends, located in the water tank assembly, of the air inlet part and the air outlet part are higher than the midpoint, perpendicular to the upper surface of the base, of the water tank assembly; the air exhaust assembly is provided with an air inlet, the air inlet is communicated with the air outlet channel of the air outlet part, and the air exhaust assembly is used for generating negative pressure; the turning cover is rotationally connected to the side, away from the air exhaust assembly, of the base, and the turning cover rotates between an unfolding position and a closing position; and a heat sealing piece is arranged on the side, away from the rotating connecting side, of the lower surface of the base and used for heating the bag opening, through the arrangement of the structure, gas-liquid separation can be effectively conducted, and liquid suck-back in the gas exhaust process is prevented.

This utility model discloses a powder pressing and cleaning device, relating to the field of auxiliary technology for refractory powder pressing. The utility model includes: a flexible hollow frame, comprising a first positioning end and a second positioning end, connected to the second positioning end by several deformation rods; a soft covering film, covering all the deformation rods to form an air cavity, with both ends of the soft covering film connected to the first and second positioning ends respectively; a gripping mechanism installed on the side of the first positioning end opposite to the air cavity, the gripping mechanism having an air passage communicating with the air cavity, the air passage communicating with the suction end of a suction collector; and a sweeping pipe, arranged along the extension direction of the deformation rods and arranged on a single deformation rod, communicating with the air cavity, with a brush arranged around its axis on the side of the sweeping pipe opposite to the deformation rod; to achieve adaptive adjustment according to the shape of the pressing head and efficient cleaning of the pressing gaps on the table surface during the pressing process.

This disclosure relates to the technical field of feed processing equipment. One embodiment of this disclosure provides a feed cooling device for auxiliary turning in feed processing, comprising: a cooling box and a rotating cover. The rotating cover is rotatably mounted inside the cooling box and is electrically driven to rotate. Feed inlet and outlet components are disposed on both sides of the cooling box. A turning and drying component is disposed inside the cooling box and the rotating cover, and the turning and drying component includes several turning racks. Air inlets are provided on the surface of the rotating cover. A docking circular plate is fixedly connected to the outside of the cooling box and rotatably mounted inside one end of the rotating cover. An air inlet pipe is provided on the docking circular plate. A side air inlet cover is installed on the outside of the cooling box, with one end of the side air inlet cover located inside the cooling box and connected to the air inlet pipe. This technical solution solves the technical problem in the prior art where poor cooling effect leads to increased time costs in the feed production process, affecting production efficiency.

The utility model provides a Helmholtz silencer based on a quasi-zero stiffness element, which belongs to the technical field of pipeline silencers and comprises an air cavity, a panel is mounted in the air cavity and connected with the air cavity through a vibrating diaphragm, a boss is fixedly mounted on the panel, and the vibrating diaphragm is connected with the boss. The boss is connected with one end of the supporting spring in the radial direction of the main pipeline, the other end of the supporting spring is connected with the air cavity, the two ends, in the axial direction of the main pipeline, of the boss are connected with one end of the pre-compression spring respectively, and the other end of the pre-compression spring is connected with the air cavity. The low-frequency noise in the pipeline is effectively controlled, the low-frequency noise control device has the advantages of being compact in structure, small in size and the like, and if noise of different frequencies needs to be controlled, only the compression amount of the pre-compression spring needs to be adjusted to change the overall rigidity of the structure; under the condition of the same neck area, a smaller air cavity volume can be adopted, the rigidity of each spring can be freely adjusted, and the height of the back cavity is greatly reduced.

The utility model discloses an integrated filter, including shell and filter core, filter core is coaxial with shell and is equipped with annular cavity between filter core outside and shell inner wall, and one end of filter core is equipped with water production mouth, and the both ends of shell are equipped with upper end cover and lower end cover respectively, and the inboard end face of upper end cover and lower end cover is equipped with the inner support of circumference distribution, is equipped with water inlet on lower end cover, is equipped with water outlet on upper end cover and water outlet communicates with water production mouth, and is equipped with the exhaust hole of communicating with annular cavity on upper end cover, the utility model discloses filter core and shell adopt the integrated structure of not needing to dismantle, and the better sealing, can bear greater pressure, and liquid can be evenly distributed on filter core outside after flowing into filter, can differentiate pressure protection filter core and dispersed liquid flow and improve filtration efficiency, can reverse flush after long -time use, need not to replace filter core, prolongs the service life of filter.

The radome gluing and pressing equipment comprises a fixed seat, a pressing mechanism and a gluing mechanism are arranged above the fixed seat, a supporting plate is rotationally connected to the interior of the fixed seat, a rotating ring is coaxially and fixedly arranged on the upper portion of the supporting plate, a driving mechanism is arranged on one side of the supporting plate, and a grinding mechanism is arranged above the fixed seat; the grinding mechanism comprises a limiting plate fixedly arranged on the rear side of the top face of the fixing base, a movable block is slidably connected to the middle of the limiting plate, abrasive paper is arranged on the bottom face of the movable block, a first annular groove is coaxially formed in the top face of the rotating ring, and a plurality of guide blocks are fixedly arranged on the inner side wall of the first annular groove in an annular structure at equal intervals. A supporting spring is fixedly arranged between the rear wall of the movable block and the inner wall of the limiting plate; the rear side of the movable block is connected with an air bag, an air cavity is formed in the movable block, and a plurality of air outlets are formed in the bottom face of the air cavity. The radar cover bonding surface polishing device can polish the bonding surface of a radar cover before a gluing and pressing process, remove a weak'surface layer 'generated by a mold pressing process, and guarantee the bonding effect.

A cleaning nozzle and an aluminum foil mill outlet flattening roller cleaning system comprise a shell, an oil inlet pipe connector, an air pipe connector, an air cap, a needle valve and other structures, an independent air cavity and an air supply pipe are matched with a control terminal, the nozzle is linearly installed on a first fixing frame and a second fixing frame, the system scale is flexibly expanded, key components are subjected to wear-resisting treatment, and the service life is prolonged. Meanwhile, sealing design is enhanced, and dismounting and maintenance are convenient. The system accurately controls oil mist composition through a control terminal and an automatic element, the functions of lubrication, cleaning and the like are achieved, and a nozzle does not need to be replaced or an additional device does not need to be used.

The present application relates to the technical field of milling processing, in particular to a plate edge milling device, which comprises a conveying line and a clamp, the conveying line is provided with a milling cutter mechanism and a laser modification mechanism on one side along the width direction, and the conveying line comprises two conveying parts separated along the width direction. The clamp comprises two clamping plates opposite to each other, the clamp can be opened and closed to clamp the side edge of the plate, and the clamping plates can be clamped on the upper and lower surfaces of the plate respectively. At least one of the clamping plates is provided with an air cavity, and a plurality of air nozzles communicating with the air cavity are arranged on the outer part of the clamping plate along the conveying direction, and any air nozzle can adjustably suck air or spray cold air. A compression roller assembly is arranged above the conveying line. The conveying line comprises a chassis, the conveying part close to the milling cutter mechanism along the width direction is fixed with the chassis, and the other conveying part can be lifted relative to the chassis.

The utility model relates to a nuclear power plant anemograph comparison device, the nuclear power plant anemograph comparison device comprises a support, an air pipe, a fan, a calibration anemograph and a clamp, the support is provided with a containing cavity, a ventilation hole and an avoiding hole; the air pipe comprises a measuring part, a connecting part and a mounting part which are sequentially connected and communicated to form an air cavity; the measuring part is provided with an air inlet; the pipe wall of the measuring part is provided with a calibration assembling hole and a to-be-measured assembling hole. The connecting part is positioned outside the side wall of the bracket; the mounting part penetrates through the avoiding hole, and an air outlet is formed in the mounting part; the fan is arranged at the air outlet of the mounting part; the calibration anemograph is arranged corresponding to the calibration assembly hole; the clamp is used for clamping a to-be-tested anemograph arranged in the to-be-tested assembly hole in a penetrating mode. Therefore, the length size of the anemograph comparison device of the nuclear power plant can be reduced, and miniaturization is realized; a simulation environment is formed in the air cavity through cooperation of the fan and the air pipe, the anemograph is calibrated to measure the real-time air speed, and the accuracy of comparison of the anemograph to be measured can be improved.

The invention belongs to the technical field of impeller detection, and provides an air floating type clamping tool and impeller dynamic balance testing device.The air floating type clamping tool comprises an outer fixing sleeve, a first air inlet connecting hole, a second air inlet connecting hole and a third air inlet connecting hole are formed in the outer fixing sleeve, and an inner mounting cylinder is fixedly mounted in the outer fixing sleeve; a wheel shaft sleeve is mounted in the inner mounting cylinder through an end cover and a locking pressing ring; an outer end face groove is formed in the side, away from the wheel shaft sleeve, of the end cover. The first air inlet connecting hole communicates with the outer end face groove through a first airflow channel. In a test state, the wheel shaft sleeve and the middle part of the wheel shaft of the impeller are encircled to form a middle cavity, and the second air inlet connecting hole is communicated with the middle cavity through a second airflow channel; a plurality of blowing holes are formed in the inner walls of the top and the bottom of the wheel shaft sleeve. The third air inlet connecting hole communicates with the blowing holes through a third airflow channel. According to the invention, the dynamic balance test precision of the impeller is higher, secondary damage possibly caused to the impeller in the test process is avoided, and the test efficiency of the impeller is greatly improved.

The invention discloses a gas flow rate related gas pressure sensor which is characterized in that the gas flow rate related gas pressure sensor comprises a first shell, a second shell and a substrate sheet arranged between the first shell and the second shell, the substrate sheet is made of an elastic material, a first gas cavity is formed between the first shell and the substrate sheet, and a second gas cavity is formed between the second shell and the substrate sheet. A second air cavity is formed between the second shell and the substrate sheet, and resistance strain gauges are distributed on the two sides of the substrate sheet; the first air cavity is communicated with the second cavity through an air guide channel; the air guide channel comprises a first horizontal channel section directly connected with the first air cavity, a second horizontal channel section directly connected with the second air cavity and a vertical channel section penetrating through the substrate sheet, and the first horizontal channel section is communicated with the second horizontal channel section through the vertical channel section; the first shell is provided with an input interface, and the second shell is provided with an output interface; the requirements on the gas type and the environment temperature are greatly reduced, and the applicability is greatly improved.

The utility model provides an air valve and an air valve module based on memory alloy driving, which comprise a shell, an air cavity is arranged in the shell, and two opposite ends of the air cavity are respectively provided with a normally open air port and a normally closed air port; an actuating piece is arranged in the air cavity and comprises a movable arm, a fixed arm and an elastic part for connecting the movable arm and the fixed arm; the movable arm extends towards one side, a plug is arranged at the free end of the movable arm, the plug is located between the normally-open air opening and the normally-closed air opening and connected with one end of a memory alloy wire, and the other end of the memory alloy wire is connected to the position, close to the elastic part, of the fixed arm. The memory alloy wire deforms after being powered on to drive the plug to move, and therefore opening and sealing closing of the normally-open air opening and the normally-closed air opening are achieved. The air valve has the advantages of being simple in structure, fast in response, accurate in control, low in power consumption, small in size, long in service life and the like, and is suitable for the fields of industrial automation, medical instruments, aerospace and the like.

The utility model discloses an air outlet device, which relates to the technical field of blowing equipment, and comprises a shell and a fan assembly, and the shell is provided with an air inlet and an air outlet; the fan assembly comprises a fan body and fan blades, the fan blades are rotatably arranged in the shell and comprise an outer hub, an inner hub, first blades and second blades, the inner hub is in transmission connection with the fan body, the outer hub is arranged on the periphery of the inner hub in a sleeving mode, the first blades are arranged in the first air cavity and connected to the periphery of the outer hub, and the second blades are arranged in the second air cavity and connected to the periphery of the outer hub. The outer hub is connected with the inner hub; a drainage ring is arranged in the shell, the drainage ring is arranged on the side, facing the air outlet, of the fan blades and is close to the outer hub, the drainage ring extends along the rotating center axis of the fan blades, the drainage ring and the inner wall of the shell are spaced to form a first flow channel, and a second flow channel is defined in the drainage ring. According to the technical scheme provided by the utility model, mutual interference of air outlet airflow is reduced, and the reliability and the blowing effect of the air outlet device are improved.

The utility model discloses a lifesaving position indicating floating belt, and relates to the technical field of lifesaving articles. According to the technical scheme, the fixing belt is characterized by comprising a belt body, a metal sheet is fixedly connected to the belt body, a connecting rope is fixedly connected to one end of the belt body, an air cavity is formed in the belt body, an air inlet pipe communicated with the air cavity is fixedly connected to the side, close to the connecting rope, of the belt body, and a sealing cover is detachably connected to an air inlet of the air inlet pipe; a first reactant is arranged in the air inlet pipe, a second reactant which reacts with the first reactant to form gas is arranged in the air cavity, and after the sealing cover is separated from the air inlet pipe, the first reactant makes contact with the second reactant. And rescue workers can quickly find and implement rescue.

The utility model discloses an air exhaust and suction structure and an adsorption structure. The air exhaust and suction structure comprises a driver, an air inlet and an air outlet, one end of the transmission rod is connected with the driver; the exhaust and suction assembly comprises a rubber sleeve and an exhaust and suction part, and an air cavity is formed in the exhaust and suction part; the other end of the connecting rod is sleeved with the rubber sleeve, and the rubber sleeve is arranged in the air cavity of the exhaust and suction part; the locking assembly comprises a locking cover and a locking piece, the locking cover is arranged on the rubber sleeve, a locking hole is formed in the locking cover in a penetrating mode, a fixing hole is formed in the end, close to the rubber sleeve, of the transmission rod, and the locking piece detachably penetrates through the locking hole and the fixing hole at the same time. The locking cover is arranged on the rubber sleeve, the locking piece is arranged in the locking hole and the fixing hole in a penetrating mode at the same time, so that the rubber sleeve and the transmission rod are connected more firmly, when the driver drives the transmission rod to move, the rubber sleeve can stably deform along with movement of the transmission rod, and stable air suction and exhaust are achieved; and the condition that the rubber sleeve is easy to fall off from the transmission rod is prevented.

This utility model relates to the field of airtightness testing technology and discloses an integrated airtightness testing machine for gas cylinder filling, including a chamber. In daily use, water is first injected into the chamber. Then, the handle is held to lift the base, top plate, and connecting frame and insert them into the chamber and the hollow partition. When air bubbles are generated, the movable ruler can be moved. After the movable ruler moves to the air bubble, the position of the air outlet can be finally determined on the marked hole and the bolt can be installed. After determining the position of the air outlet, the connecting frame and the bottle can be taken out and placed on the storage plate. The position of the air outlet is determined according to the position of the movable ruler and the angle value displayed by the angle ruler. There is no need to re-mark the holes. When the connecting frame and the bottle are taken out, the sponge plate on the mounting frame will wipe the outer wall of the connecting frame and the bottle when they are touched, which facilitates the subsequent testing of the bottle without wiping the water on the outside of the bottle.

The invention relates to the technical field of aerospace material processing, in particular to a laser hybrid welding method for a pressure vessel lock bottom structure, which comprises the following steps: step 1, carrying out pre-welding treatment on a welded junction of the pressure vessel shell lock bottom structure; 2, the equatorial seam of the pressure container is assembled, and a mechanical arm multifunctional tool is adopted for fixed spot welding; 3, local preheating is conducted on a welding seam of the equatorial seam; fourthly, laser hybrid welding is conducted on the whole pressure container in a laser-TIG composite mode; and 5, after welding is completed, inspection and treatment are conducted. By means of the laser-TIG composite welding technology, the problem that an electron beam welding gun cannot conduct all-position welding is solved, and the problems that a key hole is unstable through single-laser welding and air holes do not reach the standard under other arc welding non-vacuum conditions are solved; and a mechanical arm multifunctional tool is arranged, the welding efficiency and the assembling precision are improved, and the problem that the electron beam welding vacuum chamber limits the product structure size is solved.

The utility model provides an anti-bottom running pendant which comprises a main body made of plastic materials and comprising a hollow main body shell with one end open and the other end closed and a wire passing groove formed by inwards sinking the peripheral side of the main body shell; the wire passing buckle is inserted into the wire passing groove and clamped with the main body shell to form detachable fixed connection, the wire passing buckle and the wire passing groove jointly define a wire passing channel, the two ends of the wire passing channel are led out of the closed end of the main body shell and the side face of the main body shell respectively, the wire passing channel is used for allowing a fishing wire to penetrate through, and the fishing wire can slide in the wire passing channel; the connecting piece is fixedly arranged at the opening end of the main body shell in a covering manner, and a sealed air cavity is defined by the connecting piece and the main body shell; the balancing weight is fixed to the side, away from the main body shell, of the connecting piece. Compared with the prior art, the anti-bottom running pendant is convenient to use and good in user experience effect.

The utility model relates to the technical field of atomization, and discloses an atomizing core which comprises a body, the body is provided with a first boss, and the first boss is provided with a liquid outlet hole. The body is provided with an air outlet hole; the axis of the air outlet hole is perpendicular to the axis of the liquid outlet hole. The second boss shields more than one half of the end face area of the air outlet hole. The side wall, close to the air outlet hole, of the first boss is a first inclined face and a second inclined face which are sequentially connected in the liquid outlet direction. The slope angle of the first slope is larger than that of the second slope. The atomizing core is good in atomizing effect and low in noise.

The application discloses a high-reliability long-service-life compensator for spacecraft thermal control and a preparation method, relates to the field of space temperature control fluid loop compensators, and comprises a storage tank body, an upper cover and a bellows assembly. The upper cover is welded to one end of the storage tank body, and the bellows assembly is welded to the other end of the storage tank body. The bellows assembly is located inside the storage tank body and is used for connecting a thermal control fluid loop. A liquid cavity is formed in the bellows assembly, the liquid cavity is communicated with the thermal control fluid loop, and an air cavity is formed between the bellows assembly and the storage tank body. The main function of the compensator is to reduce fluid loop pressure fluctuation, prevent cavitation caused by excessively low inlet pressure of the loop pump, and compensate for the reduction of liquid working medium caused by long-term operation, maintenance and micro-leakage of the system. The product provided with a liquid level sensor also has a liquid level display function.

The invention relates to a classifier based on airflow separation, comprising: a casing comprising a fixed cylinder, and a conical shell cavity and an ash bucket connected to the upper and lower sides of the fixed cylinder; an external air source is obliquely blown into the conical shell cavity in the tangential direction of an air outlet of the tangential air supplement volute; corresponding conical caps are fixedly mounted at the top of the fine powder discharging pipe at intervals; the ventilating and flow guiding conical shell is matched with the fine powder discharging pipe through a mounting hole of the ventilating and flow guiding conical shell so as to be mounted on the inner side of the tangent air supplementing volute; the ventilation flow guide conical shell is hollow and is provided with a corresponding inflation cavity, and the grading reinforcing mechanism comprises a plurality of micron air holes which are uniformly distributed in the conical surface of the ventilation flow guide conical shell. According to the device, the contact rate and the contact uniformity of materials and airflow can be effectively improved, and the entrainment amount of materials with small particle sizes when the materials with large particle sizes pass through an airflow washing area can be effectively reduced.

The application relates to the technical field of heat exchange, in particular to a cold and hot air blower with an integrated built-in variable-frequency air source heat pump, which comprises a shell, a first heat exchange mechanism, a second heat exchange mechanism and a heat circulation mechanism, the shell is provided with a first chamber and a second chamber for accommodating the first and second heat exchange mechanisms respectively, the two are connected with the heat circulation mechanism to realize cold and hot exchange, and the first heat exchange mechanism is arranged on the upper layer. The first chamber is provided with a cavity opening, the second chamber is provided with a return air cavity opening and an outlet air cavity opening, the shell is provided with a load-bearing part, one side of the first chamber is provided with a power mechanism. The cold and hot air blower is also provided with a flow guide part with an angle adjusting function, a liquid collecting part, a guide part and a protection part and the like. The application discards the cold medium field connection process of the split structure, does not need professional qualification personnel to operate, simplifies the installation process, reduces the qualification requirement, realizes quick disassembly and migration, adapts to the demand of temporary places, improves the heating capacity and low-temperature heating capacity, meets the temperature control demand of large temporary places, environmental protection standards and the like, and avoids the safety hidden danger of ground icing.

The present application provides a kind of sheet positioning device, positioning method, transfer system and transfer method, it is related to sheet handling technical field.Sheet transfer system includes sheet positioning device, sheet positioning device includes suction cup with air hole and first direction inclination angle, air floatation system that can form air film on the surface of suction cup, first reference surface for first direction positioning, reference surface for second direction positioning and overturning drive mechanism for driving suction cup to produce inclination action in second direction.Sheet transfer method includes sheet positioning method, sheet positioning method is realized by controlling overturning drive mechanism the positioning of sheet in first direction and second direction, and the fixation of sheet is completed by disconnecting air floatation system.