236 results about "Airflow orifice" patented technology

The invention relates to the technical field of heat dissipation, in particular to a standing wave heat dissipation device and system, and the device comprises an active film and a passive film which are oppositely arranged. A standing wave cavity is arranged between the active film and the passive film. The cavity wall of the standing wave cavity is provided with an air flow hole channel. The active film and the passive film can vibrate in opposite directions at the same frequency, form standing waves in the standing wave cavity, continuously extrude gas in the cavity and present a surge state, so that the air in the standing wave cavity is continuously compressed and extruded from inside to outside to form an inside-outside pressure difference, and the gas in the standing wave cavity is repeatedly extruded to pass through the gas flow hole channel; and the air flow is jetted to the outside of the standing wave cavity at a high speed in a surge state to form a continuous constant high-speed air flow. When the standing wave heat dissipation device provided by the invention is used for heat dissipation, the active film and the passive film are subjected to reverse same-frequency vibration to form standing wave extrusion airflow, and compared with single vibration film vibration extrusion airflow, the airflow is faster, the efficiency is higher, and the heat dissipation effect is better.

The invention provides a double-channel air inlet mixing rectifying device which comprises an inner culvert high-temperature air flow channel, an inner culvert rectifying cone is fixedly arranged at an inner culvert outlet of the inner culvert high-temperature air flow channel, and the head structure of the inner culvert rectifying cone is obtuse; a flow channel of the outer culvert rectifying cavity comprises a first-stage outer culvert rectifying plate, a second-stage outer culvert rectifying plate, a third-stage outer culvert rectifying plate and a fourth-stage outer culvert rectifying plate, airflow holes are formed in the first-stage outer culvert rectifying plate so that the flow channel can be divided into a first-stage rectifying cavity and a second-stage rectifying cavity, airflow holes are formed in the second-stage outer culvert rectifying plate so that the flow channel can be divided into a second-stage rectifying cavity and a third-stage rectifying cavity, and airflow holes are formed in the third-stage rectifying cavity. An outer culvert inlet of the outer culvert rectifying cavity is formed in the first-stage rectifying cavity; the multiple third-stage outer culvert rectifying plates are evenly arranged in the flow channel in the circumferential direction so that the flow channel can be divided into a third-stage rectifying cavity and a fourth-stage rectifying cavity, and the multiple fourth-stage outer culvert rectifying plates are evenly arranged at an outlet of the fourth-stage rectifying cavity in the circumferential direction. The air flow field uniformity of the inner culvert outlet and the outer culvert outlet of the device is improved, and the afterburner test piece inlet flow field requirement is met.

The invention discloses an ionic liquid compressor, comprising: an end cap having an air inlet and an air outlet; the base is connected with the end cover and is provided with an air inlet cavity, an air outlet cavity and an airflow hole, the air inlet cavity is communicated with the air inlet, the air outlet cavity is communicated with the air outlet, the airflow hole is respectively communicated with the air inlet cavity and the air outlet cavity, an air inlet valve is arranged in the air inlet cavity, and an air outlet valve is arranged in the air outlet cavity; the air cylinder is connected with the base and is provided with a first cavity, and the first cavity is communicated with the airflow hole; the piston is arranged in the first cavity, and the circumferential direction of the piston is in sealing fit with the inner wall of the air cylinder; foam metal is arranged at one end, close to the airflow hole, of the piston, and the foam metal is immersed in the ionic liquid; the driving motor is arranged at the end, away from the airflow hole, of the piston and drives the piston to reciprocate. The overall performance and the operation stability of the ionic liquid compressor are improved.

The invention discloses a multi-storage-location aging test device, and relates to the technical field of new energy battery pack testing. The multi-storage-location aging test device comprises a base, the top of the base is fixedly connected with a test mechanism, and the outer wall of the base is fixedly connected with a U-shaped bin. According to the multi-storage-location aging test device, the flowing assembly is matched with the moving assembly, a heater generates heat, a fan blows airflow to perform all-dimensional uniform temperature rise on a battery pack in the test bin through an airflow hole, an electric sliding block drives the heater and the fan to change the airflow direction through the arc-shaped design of a sliding rail, and multi-angle temperature rise is achieved; the device can place a plurality of battery packs into the test bin to be tested, the test efficiency is improved, meanwhile, the electromagnetic mechanism is used for heating the side face of the test bin, the heater is combined with heat conduction of the bottom of the test bin, comprehensive heating of the battery packs is achieved, and the reliability of the test result is ensured.

An aromatherapy mosquito killer includes a shell with a light chamber, a fan chamber and a mosquito killing chamber provided therein, a light module arranged in the light chamber for emitting light outwardly, a fan arranged in the fan chamber, and an aromatherapy box arranged in the mosquito killing chamber for collecting mosquitoes and storing aromatherapy. Airflow holes are defined in top and bottom sides of a chamber wall of the fan chamber. Ventilation holes are defined in a side wall and a top wall of the aromatherapy box. Air inlets and air outlets are defined in the shell. The air inlets, the airflow holes and the ventilation holes in the top wall of the aromatherapy box cooperatively form a mosquito-killing air duct for sucking in mosquitoes; and the ventilation holes in the side wall of the aromatherapy box cooperatively form an exhaust air duct.

The invention relates to the technical field of rotary table welding, in particular to a welding method based on a large-table-board and large-bearing-tonnage rotary table. The method comprises the steps that blanking, beveling, welding and leveling are conducted on a target bedplate according to a preset bedplate splicing position, welding, annealing aging treatment and machining are conducted on a target sliding rail according to a preset sliding rail tailor-welding position, and the welded target bedplate, the target sliding rail, transverse and vertical rib plates with preset welding shrinkage and air flow holes and main basic components are welded into a whole; welding points are fixedly assembled to form a rotating table body, welding rib plates are reinforced to connect welding seams, the table plates are removed, the rotating table body of the welding tool support is welded according to the welding sequence, the tool support is detached, the welding seams between the target table plate and the rotating table body are welded, and an upper cover plate is welded to the rotating table body. And carrying out annealing aging treatment after welding. According to the welding method, the welding quality of the sliding rail and the rib plate and the stability of a machined finished product of the rotating table are guaranteed.

A wine bottle (1000), the wine bottle (1000) comprising a bottle body (100), a bottle plug (300) and a wooden plug member (500), wherein a liquid storage cavity (11) is provided in the bottle body (100), and a sealing hole (13) in communication with the liquid storage cavity (11) is provided in one end of the bottle body (100); the bottle plug (300) is movably connected to the bottle body (100), and opens or covers the sealing hole (13) during movement, a plunger portion (30a) is provided on the bottle plug (300), the plunger portion (30a) is inserted into the sealing hole (13) and abuts against an inner wall of the sealing hole (13), an accommodating cavity (34) is formed in the plunger portion (30a), a contact opening (341) and an air flow hole, which are in communication with the accommodating cavity (34), are provided in the plunger portion (30a), the contact opening (341) is exposed to the liquid storage cavity (11), and one end of the air flow hole is exposed to the end surface of the bottle plug facing away from the bottle body; and the wooden plug member (500) is arranged in the accommodating cavity (34) and abuts against an inner wall of the accommodating cavity (34). The technical solution can improve the operational convenience and structural stability of the wine bottle.

The utility model discloses a novel toona sinensis sauce steam sterilization device, which relates to the technical field of steam sterilization and comprises a steam heat source machine for generating high-temperature steam, a heat insulation bin is fixedly mounted on the steam heat source machine, a plurality of sterilization boxes are rotatably mounted in the heat insulation bin, one end of each sterilization box close to the steam heat source machine is a bottom end, and the other end of each sterilization box is a top end. A plurality of vent holes are further formed in the bottom end of the sterilization box, a plurality of side sealing plates are further installed on the inner wall of the heat insulation bin in a sliding mode, two airflow holes are formed in each side sealing plate, the airflow hole, close to the steam heat source machine, of each side sealing plate is an airflow inlet, and the airflow hole, away from the steam heat source machine, of each side sealing plate is an airflow outlet; according to the toona sinensis sauce sterilizing device, the vent holes are formed in the sterilizing box, airflow enters from the bottom of the sterilizing box to disinfect and sterilize toona sinensis sauce, meanwhile, high-temperature steam is recycled through the airflow inlet and the airflow outlet in the side sealing plate, and the utilization rate of the high-temperature steam is greatly increased.

The invention relates to the technical field of sample collection, and provides a skin sampling device convenient for collection and storage, the skin sampling device comprises a shell 1 and a shell 2, and the surface of the shell 2 is provided with a mounting port. Sterile water is conveyed to a spray head through a water pump, the animal is cleaned through the spray head, after cleaning is finished, an air inlet fan enables external air to enter an air drying cover through a flow guide cavity, and the skin of the animal is air-dried through airflow holes in the surface of the air drying cover, in addition, an electric telescopic rod drives a base plate to move downwards; swab paper on the surface of the hook-and-loop fastener is attached to an animal, when the swab paper makes contact with the animal, the sponge is stressed to deform, the swab paper can be conveniently attached to the surface of the animal, a motor drives a mounting piece to rotate through a connecting shaft, and the swab paper is driven to rotate through the mounting piece, an electric telescopic rod, a base plate, a buffer spring, an adjusting block, the sponge and the hook-and-loop fastener. The sample on the animal skin surface is collected.

The present invention relates to a filter assembly structure and a vacuum cleaner, comprising: a filter; an assembly having an inner cavity, the assembly having an opening and an air flow hole connected to the inner cavity, a portion of the filter being sealed and assembled in the inner cavity from the opening, a sealed cavity being defined between the filter and the cavity wall of the inner cavity; an opening and closing member for opening and closing the air flow hole, the opening and closing member opening the air flow hole when the pressure in the sealed cavity is greater than the pressure in the external space, and closing the air flow hole when the pressure in the sealed cavity is less than the pressure in the external space; when the filter is subjected to a force that urges it to separate from the assembly, an air pressure difference is generated between the sealed cavity and the external space that urges the filter to be adsorbed on the assembly. When the filter is subjected to a force that urges it to separate from the assembly, the volume of the sealed cavity increases, and at this time, the pressure in the sealed cavity decreases, and an air pressure difference is generated between the sealed cavity and the external space that urges the filter to be adsorbed on the assembly, thereby making it difficult for the filter to separate from the assembly.

The invention discloses surrounding welding equipment for liquid level meter outer barrel machining, and relates to the technical field of liquid level meter outer barrel machining and welding. The surrounding welding equipment for liquid level meter outer barrel machining comprises a containing frame, the top of the containing frame is fixedly connected with a welding part, the inner top of the containing frame is fixedly connected with a power part, the top of the power part is rotationally connected to a workbench, and the top of the containing frame is fixedly connected with a guiding mechanism. According to the surrounding welding equipment for liquidometer outer barrel machining, by arranging the guiding mechanism composed of the draught fan, the airflow pipe and the airflow difference assembly, the equipment can actively generate and guide airflow near a welding point, on one hand, the airflow generated by the draught fan is directly blown through the airflow pipe, smoke generated by welding is blown away from a welding area, and on the other hand, by means of the Bernoulli principle, the welding efficiency is greatly improved; and airflow flowing at a high speed in the airflow bin forms a negative pressure area through airflow holes in the wall surface of the airflow bin.

The embodiment of the invention discloses a wafer baking device. The wafer baking device comprises a pressure cavity, a baking cavity and a circulation assembly, and at least one side of the baking cavity is provided with a plurality of airflow channels. According to the embodiment of the invention, when'water vapor 'and'holes' in the wafer are removed, the circulation assembly is utilized to introduce gas into the pressure cavity and drive the gas to flow in the gas flow channel, and when the gas flows through the gas flow channel, part of the gas flows into the baking cavity through the gas flow channel due to irregular movement of the gas, so that the baking efficiency is improved. The other part of the gas flows in the gas flow channel and enters the baking cavity, that is, the part of the gas is intercepted through the gas flow hole channel and enters the baking cavity, so that the gas can uniformly flow to the wafer, the wafer in the baking cavity is uniformly baked and heated, and bubbles and cavities in the wafer are effectively removed.

The utility model discloses a reinforced explosion-proof liquid oxygen storage tank, which belongs to the technical field of liquid oxygen storage tanks, and comprises a liquid storage tank, one side of the liquid storage tank is fixedly connected with an air flow pipe, one end of the air flow pipe is fixedly connected with a guide pipe, the top of the guide pipe is provided with a sealing joint, the side wall of the guide pipe is provided with four air flow holes, and the air flow holes are communicated with the air flow pipe. A limiting ring is arranged on the outer side of the airflow hole, a rupture disk is slidably connected into the limiting ring, and a nut is connected to the limiting ring in a threaded mode. According to the reinforced explosion-proof liquid oxygen storage tank, by arranging the guide pipe, the sealing joint and the rupture disk, when the pressure of the liquid oxygen storage tank exceeds a set threshold value, the sealing joint is pushed to move upwards, gas is exhausted through the top of the guide pipe to reduce the pressure, and when the guide pipe is in the exhaust process and the pressure of the storage tank is still increased and exceeds the threshold value of the rupture disk, the sealing joint is pushed to move upwards. And the rupture disk is ruptured to quickly exhaust and depressurize, so that the exhaust efficiency is improved, and the tank body structure is prevented from being damaged or ruptured.

The invention relates to the technical field of bladeless fans, in particular to a bladeless fan and a temperature control method thereof.The bladeless fan comprises a base, a filter screen is movably connected to the base, a drawer is fixed to the filter screen, a plurality of sets of ice crystal boxes are movably connected to the drawer, a limiting mechanism is arranged between the base and the filter screen, and a plurality of sets of air inlet holes are formed in the filter screen and the drawer; the ice crystal box has the beneficial effects that the ice crystal box is taken out of the base and put into a refrigerator to be frozen for six hours, so that the ice crystal box stores enough cooling capacity, then the ice crystal box is put back into the drawer and put back into the base, and when the motor is powered on to drive the impeller to rotate, air enters the ice crystal box containing groove from the air inlet hole and makes contact with the ice crystal box; the cooling capacity stored in the hydrogel in the ice crystal box is transmitted to the air, so that the air is cooled, the cooled air is pressurized by the impeller, blown into the air pipe from the airflow hole and then exhausted through the exhaust hole, the function of controlling the indoor temperature to be reduced is achieved, and a better cooling effect is provided for a user.

The invention discloses a laser cutting machine for conveyor scraper machining, and relates to the technical field of metal cutting equipment manufacturing. The laser cutting machine for conveyor scraper machining comprises a workbench, the top of the workbench is movably connected with a first moving device, the top of the first moving device is movably connected with a second moving device, and the outer wall of the second moving device is fixedly connected with an air cannon mechanism. According to the laser cutting machine for conveyor scraper machining, when an extrusion plate moves towards the interior of a gas bin, gas in the gas bin can be extruded, the gas enters a triangular bin through a limiting bin and a connecting bin, falling of the scraper is accelerated under the impact of airflow, and the situation that the machining efficiency is low due to the fact that the scraper is difficult to separate is avoided; and when the extrusion plate extrudes the gas again towards the gas bin, the gas in the gas bin can also be extruded to the first baffle plate, so that the first baffle plate is attached to the interior of the airflow hole again.

The invention belongs to the technical field of electroacoustics, and particularly relates to a sound production device and electronic equipment, the sound production device comprises a shell and a sound production monomer and a breathable separator which are arranged in the shell, the sound production monomer is matched with the shell to define a front sound cavity and a rear sound cavity in the shell, the rear sound cavity is filled with molecular sieve powder particles, and the breathable separator is arranged in the shell. The breathable separator is used for separating the molecular sieve powder particles from the sound production monomer, the breathable separator is a nuclear track membrane, the nuclear track membrane is provided with a plurality of breathable micropores, each breathable micropore is provided with an airflow pore channel penetrating through a membrane body, and an inclination angle alpha and 0 degree lt is formed between the extension direction of at least part of the airflow pore channels and the thickness direction of the membrane body in the flowing direction of airflow; [alpha] [lt]; and 90 degrees. According to the sound production device, under the condition that the required ventilation volume is achieved, molecular sieve powder particles can be more effectively isolated and protected, and the powder particles are prevented from leaking to pollute the sound production monomers.

The present application relates to the technical fields of oil extraction safety valve, more particularly to a kind of underwater pressure balanced gate valve for deep-sea oil extraction operation, including gate valve body, the gate valve body includes valve body main body, fluid passage is arranged at the both ends of the valve body main body, fluid passage is arranged with valve plate moving cavity in the middle part, gate plate is installed in the inside of valve plate moving cavity, two air flow holes are arranged in the both sides of valve plate moving cavity, air flow hole is communicated with pressure chamber in the other end, air pressure plate is installed in the inside of pressure chamber;The present application is provided with sealing air bag, it is favorable when gate plate is closed, partial pressure groove negative pressure area disappears, triangular arc groove is preset with sealing air bag, and it is expanded under the action of pressure chamber high pressure, and it is formed dynamic sealing by being closely attached to gate plate;Meanwhile, through sealing air bag and crude oil self-lubricating effect, realize high sealing property and wear resistance under high pressure, it is suitable for deep-sea oil well wellhead valve and other high pressure working conditions, significantly improve the reliability and service life of valve under extreme environment.

The present application relates to an atomizer and an electronic atomization device. The atomizer comprises an oil cup and an atomization assembly, the atomization assembly comprises a bottom assembly, a top assembly mounted to the top end of the bottom assembly, and a heating assembly clamped and positioned between the bottom assembly and the top assembly, and is provided with an airflow channel penetrating through the top assembly and the heating assembly from top to bottom; the top assembly is mounted into the oil cup and is in sealing connection with the inner wall of the oil cup, the top assembly is provided with a liquid inlet channel for providing atomization liquid in the oil cup to the heating assembly, the heating assembly comprises an oil guide body and a heating body stacked together, the oil guide body is connected with the liquid inlet channel and has a first airflow hole forming part of the airflow channel, and the heating body is arranged on the side of the oil guide body away from the top assembly and bypasses the first airflow hole. The present application can reduce the generation of condensate, avoid the phenomenon of users inhaling condensate, and has fast oil supply speed and large atomization area, so as to provide users with better smoking experience.

The utility model relates to the technical field of fire extinguishing equipment, in particular to an aerosol fire extinguishing device suitable for an electric appliance cabinet, which comprises a fire extinguishing shell, a cooling ball, an aerosol grain, a left thermosensitive line and a right thermosensitive line, and a first drainage air passage, a second drainage air passage and a third drainage air passage are sequentially arranged on the inner side of the fire extinguishing shell from left to right. The first drainage air channel, the second drainage air channel and the third drainage air channel are all filled with cooling balls. The aerosol medicine column is reasonable and compact in structure, by arranging the first drainage air channel, the second drainage air channel and the third drainage air channel, after the aerosol medicine column reacts and generates an aerosol mixture, the drainage air channels can conduct flow guiding on the aerosol mixture, and therefore the aerosol mixture can flow through the drainage air channels in the process that the aerosol mixture passes through the drainage air channels. The aerosol mixture can be fully contacted with the cooling ball for a long time in a long path, the cooling effect can be improved, and the cooled aerosol mixture is sprayed out from the left airflow hole and the right airflow hole under the action of pressure to control a fire source.

The invention discloses a sound production device for an overhead air horn, which belongs to the technical field of air horns and comprises a mounting base, a sound production assembly, a protective shell and an elastic supporting piece. The mounting base is provided with the coaxial positioning part and the multiple groups of airflow holes surrounding the coaxial positioning part, and a balanced airflow path is formed in cooperation with a communicating structure of the ventilation hole, the airflow channel and the annular groove in the horn head; the annular groove and the airflow holes surrounding the coaxial positioning part cooperate to ensure that airflow is uniformly distributed along the circumferential direction of the sounding sheet, and the problem that local high-speed airflow impacts a specific area of the sounding sheet for a long time in the prior art is avoided; the conical supporting section of the mounting base is coaxially connected with the axial through section through a smooth conical surface, external compressed airflow is guided to be smoothly transited to the acoustic channel, resistance and pressure fluctuation when the airflow enters are reduced, a uniform stress foundation is provided for the sound production piece, the sound production piece is prevented from shifting due to uneven local stress from the source, and the sound production efficiency is improved. And the long-term stability of the vibration frequency is ensured.

The utility model relates to cloth chute technical field, the utility model provides a cloth chute of even unloading, it includes motor, fan blade and airflow hole. The utility model still includes transmission shaft, knock stick and push material board. In the utility model, through the mutual cooperation between the motor, fan blade and airflow hole etc. Component of even unloading mechanism, after fixing the chute through mounting plate, start motor, make its output shaft drive pivot rotation, further drive pulley no.

The utility model discloses a hollow graphitization furnace column which comprises a furnace column body, the furnace column body is in a vertically arranged rectangular column shape, the left side and the right side of the furnace column body are both provided with installation protrusions, and the furnace column body is connected with a furnace wall in a clamped mode through the installation protrusions. A hollow channel with an opening in the bottom end is formed in the furnace column body, a plurality of communicating air holes are formed in the left side and the right side of the hollow channel, one end of each communicating air hole communicates with the hollow channel, and the other end of each communicating air hole penetrates through the outer side end face of the mounting protrusion and then communicates with an airflow through hole preset in the side wall of the furnace wall; the front side and the rear side of the hollow channel are each provided with an air inlet and an air outlet, and the air inlets are located below the air outlets. A plurality of negative pressure airflow holes are formed in the end wall of one end, close to the interior of the graphitization furnace body, of the furnace column body, are positioned between the air inlet and the air outlet and are communicated with the hollow channel.

The utility model provides an air floating motion platform which comprises a base, a first driving part and air floating guide rails arranged at the two ends of the base in the first direction, a cross beam is arranged between the two air floating guide rails, the two ends of the cross beam are connected with air floating plates, and the first driving part drives the cross beam to move in the second direction. An opening is formed between at least one end, facing the cross beam, of the air floating guide rail and the base, the air floating plate is partially and movably arranged in the opening and faces the base, and airflow holes are formed in all surfaces of the air floating guide rail; air flow holes in the air floating plates generate air flow acting on the base and the air floating guide rails, generated upward air floating force and generated downward air floating force are matched with each other, air floating force generated by the two air floating plates in the first direction is matched with each other, the air floating plates are suspended above the base in the moving process of the cross beam, and the air floating plates do not make contact with the air floating guide rails. Friction among the air floating plate, the base and the air floating guide rail during moving is avoided, the air floating motion platform can be made to be light, and the motion speed and precision of the air floating motion platform can be improved.

The invention provides a light pull-type pressing rocket jamming bomb. The light pull-type pressing rocket jamming bomb comprises a rocket jamming bomb body, a turbine, a combustion chamber, a heat dissipation grating, a power amplifier chamber and a warhead. The turbine is arranged at the bottom of the rocket jamming bomb body, and the turbine and the rocket jamming bomb body are connected through a shaft arranged on the turbine; the combustion chamber is located on the lower middle portion of the rocket jamming bomb body, propellant powder is stored in the combustion chamber, and airflow holes are formed in the bottom of the combustion chamber. The heat dissipation grating is used for dissipating heat transmitted upwards by the combustion chamber; the power amplifier chamber is arranged at the middle upper part of the rocket jamming bomb main body, and a signal jamming device is stored in the power amplifier chamber; the warhead is arranged at the front end of the rocket jamming bomb body and used for reducing air resistance. And a guide head is arranged in the warhead. The jamming bomb provided by the invention can be used for firing together with a traditional rocket bomb, the purposes of jamming radar signals and hiding the position of the rocket bomb are achieved, and the rocket jamming bomb has no actual lethality and is wide in application range.

The utility model belongs to the technical field of equipment detection devices, and discloses an oxygen sensor airtightness detection device which comprises a main board, a supporting frame and a detection mechanism are fixedly connected to the upper surface of the main board, the detection mechanism comprises a placement box, a second sealing plate is arranged at a groove of the placement box, airflow holes are formed in a placement groove and the second sealing plate, and the airflow holes are communicated with the airflow holes. A connecting plate is fixedly connected to the other end of the placement box, an air tightness detector is fixedly connected to the outer side of the connecting plate, an air cylinder is fixedly connected to the interior of the mounting box, the output end of the air cylinder is in transmission connection with a telescopic rod, and the other end of the telescopic rod is fixedly mounted on the upper surface of the second sealing plate. A to-be-detected oxygen sensor is placed in the placing groove, the air cylinder is used for driving the telescopic rod at the output end to move downwards, the lower end of the telescopic rod is fixedly connected to the upper surface of the second sealing plate, the second sealing plate seals the upper surface of the placing groove, and the first sealing plate and the second sealing plate are used in cooperation. And the overall airtightness detection effect of the device is improved.

The adjustable pressing device of the vertical sawing machine belongs to the technical field of vertical sawing machines and comprises an adjusting motor, the output shaft of the adjusting motor is fixedly provided with a driving stud at one end, the driving stud is movably provided with a supporting assembly outside, the supporting assembly is rotatably provided with a mounting turntable, and the upper surface of the mounting turntable is provided with an airflow hole, a chip removal saw groove and a stroke groove; in the adjustable pressing device, a plurality of adjustable pressing mechanisms are arranged in a matched mode, the traditional hydraulic workpiece positioning design is abandoned, a plurality of different positioning rollers are utilized, the direction of the positioning rollers is changed, the quick positioning of the cutting workpiece is realized, the convenience of operation is greatly improved when the cutting workpiece is installed and dismounted, the machining efficiency of the equipment can be ensured, the workpiece damage or unstable positioning caused by hydraulic positioning can be avoided, and the practical application effect of the device is greatly improved.

The embodiment of the utility model provides a miniature vacuum air pump which comprises an air collecting and exhausting assembly provided with an exhaust port and a valve plate assembly arranged on the outer side of the exhaust port to control airflow exhausted from the exhaust port, and the valve plate assembly comprises a valve plate and an umbrella pin. The valve plate is provided with an airflow hole allowing airflow to pass through and an insertion hole used for installing the umbrella pin, and the umbrella pin comprises an umbrella rod correspondingly inserted into the insertion hole and an umbrella cover connected to the end, away from the exhaust port, of the umbrella rod and used for movably sealing the airflow hole. A plurality of annular protruding ribs surrounding the umbrella rod are further formed on the surface of the side, facing the valve plate, of the umbrella cover. According to the embodiment of the utility model, when the miniature vacuum air pump sucks air and the umbrella pins fall back to clap the plate surface of the valve plate, the umbrella pins are in contact with the plate surface of the valve plate through the annular convex ribs of the umbrella covers, and the contact surface of the umbrella pins and the plate surface of the valve plate is smaller, so that the noise generated by clapping the valve plate by the umbrella pins is smaller, and the working noise of the miniature vacuum air pump can be effectively reduced.

The utility model relates to an MOFs adsorption filter element and a volatile organic compound filtering system based on MOFs, and the MOFs adsorption filter element comprises a groove-shaped shell and a detachable cover plate, one side of the groove-shaped shell is open, the interior of the groove-shaped shell is hollow, and the detachable cover plate is matched with the opening of the groove-shaped shell; the two ends of the groove-shaped shell are each provided with an airflow hole, each airflow hole is communicated with a ventilation pipe, and the outer surface of each ventilation pipe is provided with a detachable connecting structure. At least one filter plate is detachably arranged in the groove-shaped shell, at least one through hole is formed in each filter plate, the surface of each filter plate is coated with MOFs (Metal Organic Frameworks), and when the filter plates are fixed in the groove-shaped shell, the angle formed by the normal of each filter plate and the center connecting line of airflow holes in the two ends of the groove-shaped shell is smaller than or equal to 30 degrees. The MOFs adsorption filter element can be used for adsorbing VOCs in gas so as to purify the gas.

The present invention relates to the technical field of on-line detection equipment for primary air ducts, and specifically discloses an on-line detection and alarm device for primary air ducts, which specifically includes: a vibration mechanism is arranged inside the main body; an air flow hole is opened on the outer side wall of the main body; an air flow detection mechanism is arranged inside the main body opposite to the air flow detection hole; an alarm mechanism is arranged inside the main body, and a control mechanism is electrically connected to the air flow detection mechanism, the vibration mechanism, the primary air damper and the coal feeder. The alarm mechanism is used to give an alarm after the air flow detection mechanism detects abnormal gas flow in the primary air duct. By obtaining various data information of the air flow and pulverized coal in the primary air duct detected currently, it is judged whether a blockage occurs in the current primary air duct. If a blockage occurs, pre-treatment is carried out. If the blockage situation is not solved, an alarm message is sent to the operator, preventing the problems that in the traditional method, when the operator detects the primary air duct, the detection efficiency is reduced and it is easy to miss detection, which may further lead to the damage of the combustion furnace and cause casualties.

An object of the invention is a module arrangement being arranged to a M x N matrix, N being any natural number. A fuel inlet manifold (150) and a fuel outlet manifold (152) form a fuel manifold (171) to deliver supply fuel gas (108) to the stacks and fuel exhaust gas (177) from the stacks, and the stacks been arranged in the manifold in a parallel connection from the fuel gas supply and fuel exhaust gas connection point of view. The inlet manifold (150) comprises gas flow holes of controllable sizes to the stacks (103) for forming even gas flow to the stacks, and the outlet manifold (152) comprises gas flow holes of controllable sizes to the stacks (103) for forming even gas flow from the stacks. The inlet manifold (150) comprising a connection structure (160), and a flow element (320) braking the main flow stream coming from the gas inlet connection (160), and the inlet manifold (150) comprising a gas volume (300) between the flow element braking the main flow stream and inlet manifold connection structure, and at least one of the inlet manifold and the outlet manifold comprising two layer structure comprising a gas tight cover structure (330) and inner heat insulation structure (310), and the module arrangement comprises a first gas seal (155) on the gas tight cover structure, a first electrical insulation plate (119) and a second gas seal (156) between the manifold (171) and the stack (103). On top side (122) and on bottom side (124) of the cell stack (103) the module arrangement comprises a second electrical insulation plate (114), compression structures (116) for the stacks (103), and an air side sealing structure (169) between the stacks, and each stack end plate (170) is connected with an electrical connection.