130results about How to "Avoid air leaks" patented technology

The invention discloses an automatic large-size workpiece machining device. The device comprises a work platform, a feeding and discharging device, a machining device and a containing device; the work platform comprises a lathe bed, stand columns on the left side and the right side of the lathe bed and a first guide rail arranged on the stand columns; a machining table is arranged on the front side of the lathe bed, a limiting groove is formed in the rear side of the lathe bed, the feeding and discharging device is arranged on the rear side of the lathe bed in a turnover manner, the machining device comprises a beam crossing the stand columns, a vertical moving device arranged on one side of the beam and a second suction cup device arranged on the other side of the beam, and the beam can slide along the first guide rail; the containing device is located at the end, away from the work platform, of the feeding and discharging device, and is used for containing a workpiece. Automation of the whole work segment is achieved, machining efficiency and machining quality are improved, and the probability of waste appearing is reduced, and in addition, the whole device is simple in structure and convenient to operate.

The invention discloses an automatic-dedusting communication box which comprises a communication box body. A dust collector is arranged at the top of the communication box body, a dust collection pipeis arranged at the input end of the dust collector and positioned on two sides of the communication box body, a dust collection port is arranged on the inner side of the dust collection pipe, one end, away from the dust collection pipe, of the dust collection port penetrates and extends to an inner cavity of the communication box body, a support is arranged in an inner cavity of the dust collection port, a rotating shaft is arranged on the surface of the support, fan blades are arranged on the surface of the rotating shaft, a dust outgoing pipe is arranged at the output end of the dust collector, a water tank is arranged at one end, away from the dust collector, of the dust outgoing pipe, a motor is arranged at the top of the water tank, and a rotation shaft is arranged at the output endof the motor. Through mutual cooperation of the dust collection port, the fan blades, the rotating shaft, the dust collection pipe, the dust collector, the dust outgoing pipe, the water tank, the motor, the rotation shaft and a filtering plate, the communication box can be dedusted automatically and has better dedusting effect.

The invention relates to an air impermeability detecting table for a sluice valve. The air impermeability detecting table for the sluice valve comprises a clamping table. A sealing table is arranged in the middle of the upper end surface of the clamping table, an air supply hole is formed in the center of the sealing table, and clamping jaws are evenly arranged around the sealing table. A left supporting pillar and a right supporting pillar are correspondingly arranged at the left side and the right side of the upper end surface of the clamping table respectively, a movable compression frame is arranged above the clamping table, a groove is formed in the right portion of the upper end surface of the movable compression frame, a transverse kidney-shaped hole is formed in the middle of the bottom surface of the groove, a round hole is formed in the right portion of the bottom surface of the groove, a notch is formed in the left side of the movable compression frame, a strip-shaped opening is formed in the bottom of the notch, a connector is arranged inside the round hole in a communicating mode, an adapting connection rod is arranged at the upper end of the connector, the adapting connection rod can rotate on the connector, a left threaded rod is fixedly connected to the adapting connection rod, a compression hydraulic cylinder is fixed inside the kidney-shaped hole, and a visible pressing frame is fixed to the lower end of the compression hydraulic cylinder. According to the air impermeability detecting table for the sluice valve, a compression ring is adopted to compress the circumference of a valve body, the condition of uneven clamping generated when the clamping jaws are adopted for clamping is avoided, and the compression hydraulic cylinder can be adjusted on a two-dimensional plane.

A method for improving the hole sealing effect based on a drilled surrounding rock fracture structure comprises the following steps that a crushed zone, generated due to the influence of roadway tunneling, of surrounding rock suffers from secondary influence in the hole drilling process, radial fractures are generated on a coal wall, besides, a large number of primary fractures are expanded again in the coal seam forming process, a large number of macroscopic and microcosmic hole channels can be formed in the extraction process, air enters the paths for extraction and hole drilling during negative pressure extraction, and then a pipeline is extracted. The drilled surrounding rock fractures are sealed at reasonable length by analyzing the range of the crushed zone generated due to hole drilling tunneling, an expandable hole sealing material high in strength and good in liquidity is adopted, the hole sealing length is properly controlled, and the hole sealing effect and the hole sealing quality are effectively improved. The proper hole sealing section position and hole sealing material are selected, the air leakage channels of hole drilling are reduced, it is avoided that air in a roadway enters an extraction device along the hole drilling fractures, the hole sealing material and cost are reduced, and the concentration and extraction efficiency of hole drilling extraction gas are improved.

The invention discloses a G2.5 diaphragm gas meter. A machine core is installed in an installation shell and comprises a machine core body, a flow channel structure is formed in the top of the machine core body, and the cross section of an air distribution flow channel and the cross section of an air outlet flow channel are both of a hexagonal structure, wherein the hexagon structure is formed by coinciding any side of a rectangle and the long bottom side of an isosceles trapezoid. A partition board is arranged in the air distribution flow channel. A valve grid is installed on the top of the machine core and provided with two valve decks. Two vertical shaft fixing pipes are both internally provided with a vertical shaft, the other end of the each vertical shaft is connected with a transmission mechanism, the transmission mechanism is provided with an error adjusting mechanism, and the transmission mechanism is connected with the two valve decks. The flow channels and the valve grid in the machine core are improved and designed. The error adjusting mechanism is further arranged, so the diaphragm gas meter can meet the national standard GB / T6968 if the rotation volume in the G2.5 diaphragm gas meter is 0.8 L. The structures of the flow channels are more optimized, metering precision is high, the size of the gas meter is reduced, and part cost and package, transport and storage cost are greatly reduced.

The invention discloses a gas supply pipeline internal pressure monitoring device. The gas supply pipeline internal pressure monitoring device comprises an enclosure, an audible and visual alarm, a gas supply pipeline, a methane sensor, a mounting inner shell, an electric plate and a mounting plug. The enclosure is mounted outside the gas supply pipeline. The audible and visual alarm is fixedly mounted at the top of the enclosure. The mounting plug is mounted in a pressure monitoring hole formed in the gas supply pipeline in a threaded mode. The methane sensor is fixedly mounted on the inner wall of the top face of the enclosure. A mounting sleeve is fixedly mounted at the top of the enclosure. According to the gas supply pipeline internal pressure monitoring device, the mounting inner shell is mounted inside the device, adsorbed activated carbon and an organic solution tank are mounted inside the mounting inner shell, when gas inside the pipeline is leaked into the monitoring device,one part of the leaked gas can be adsorbed by the adsorbed activated carbon, one part of the leaked gas can be dissolved into organic fluid in the organic solution tank, the leaked gas can be effectively treated, the phenomenon that the leaked gas is left in the device or leaked outside is avoided, and the using safety of the device and the gas pipeline is further guaranteed.

The invention discloses a textile cloth dryer capable of achieving efficient drying. The textile cloth dryer comprises a drying box, transmission devices are arranged on the two sides of a cavity of the drying box correspondingly, belt pulleys are movably connected with cavities of the transmission devices through rotary shafts, and the two belt pulleys are movably connected through a belt in a transmission mode; leaking holes are formed in the surface of the belt, inlets and outlets are formed in the two sides of the drying box correspondingly, and an air heater is arranged on the back face of the drying box; and an air suction pipe is arranged at the input end of the air heater, an air exhaust pipe is arranged at the output end of the air heater, and the two ends of the air exhaust pipe penetrate through and extend to the cavity of the drying box. Through mutual cooperation of the inlets, the outlets, a controller, a first connecting pipe, a second connecting pipe, the air exhaust pipe, an air exhaust head, the belt, the leaking holes, the transmission devices, the rotary shafts, the belt pulleys, the air suction pipe and the air heater, the textile cloth dryer can achieve efficient drying of textile cloth when used for drying the textile cloth.

The present invention relates to a respiratory mask and a guide connecting member thereof. The respiratory mask comprises a mask body, an air duct and the guide connecting member. The mask body includes an air inlet and a through hole close to the air inlet, wherein the air duct is connected with the air inlet and is used to transmit air into the air inlet. The guide connecting member comprises aplug body installed to the through hole and a sealing plug connected with the plug body, wherein the plug body includes an annular elastic retaining piece which defines an insertion aperture and a first fracture line extending from the inner rim to the outer rim to make the insertion aperture opened up for external expansion. A conduit is inserted in the insertion hole and is clamped by the elastic retaining piece. The sealing plug is inserted in the insertion hole in a detachable manner to seal the insertion hole.

An automatic multidimensional gas phase chromatography system is featured as switching mixture sample from precolumn to analysing column by controlling pressure difference between axiliary pressures based on pressure balance principle to have overcome defect of valve leakage and block in normal system. A method utilizing the system to analyse mixture is also disclosed.

The invention discloses an automatic closing device for a gas pipeline during cooling. The automatic closing device comprises a first gas pipeline and a second gas pipeline; a casing pipe is sealed between the first gas pipeline and the second gas pipeline in a sleeved manner, a first magnet is hinged to the inner wall below the position, arranged in the casing pipe, of a first gas pipeline port, a first magnet is used by a valve to close the first gas pipeline, and magnetic poles of the first magnet are located at the upper end and the lower end; a second magnet is arranged above the casing pipe, and the second magnet is located above the first magnet at the same time; magnetic poles of the second magnet are also located at the upper end and the lower end, and the second magnet can vertically turn over; and the second magnet is a ferro-nickel magnet, and is connected with a thermosensitive metal line, and a probe at the other end of the thermosensitive metal line is connected to a cooking bench to be used for temperature measuring. The automatic closing device is obviously stable in effect, and the potential safety hazard that the cooking bench flames out accidently, and gas leakage is caused can be effectively eradicated.

The invention relates to the field of valves, in particular to a valve with filter screen convenient to replace. The valve with filter screen convenient to replace comprises a valve body, a fixing pipe, a connecting structure, an adjusting structure, an alarming structure, a filtering structure, a mounting structure and a limiting structure. The mounting structure is arranged, so that the filtering structure is conveniently drawn out from the inside of the fixing pipe and can be replaced conveniently; the limiting structure is matched, so that the mounting structure is limited and fixed afterthe filtering structure is mounted, and then normal work of the filtering structure is guaranteed; the adjusting structure is arranged, therefore, the air pressure required by pressure relief can be adjusted according to actual use, the valve body can be directly and completely closed so as to facilitate follow-up work, and the pressure relief of the adjusting structure can further drive the alarming structure to work; and the alarming structure can work to alarm in time when the filtering structure is blocked, so that it is convenient for maintainers to carry out maintenance, and accidents are avoided.

The invention relates to an air-valve structure and an inflatable seat applying the same, in particular to the air-valve structure with few parts involved and not easy to damage. The air-valve structure comprises a base body, a valve body and a floating piece, an inserting groove is formed in the base body, a magnetic piece is arranged on the inner bottom surface of the inserting groove, the valve body is arranged in the inserting groove of the base body in a locked manner, a through penetrating hole is formed in the center of the valve body, the floating piece is slidably arranged in the penetrating hole of the valve body, an air hole with an upward opening is formed in the center of the floating piece, at least one guide hole communicated with the air hole is formed in an annular abutted piece on the periphery of the floating piece, and another magnetic piece corresponding to the magnetic piece of the base body and repellent to the same is arranged on the bottom surface of the floating piece. By the aid of the design that the magnetic piece inside the base body is repellent to the magnetic piece of the floating piece in the valve body, the floating piece can generate power of closure relative to the penetrating hole of the valve body, the problem and trouble caused by using of elastic pieces or electromagnetic valves in the prior art are avoided, elastic fatigue is avoided, service life of the air-valve structure can be prolonged, and generation of pollutants can be decreased.

The invention discloses a periodic gating unit for suction of worms and air and for granary sampling analysis. The periodic gating unit comprises a fixed disc provided with a groove, a moving disc arranged in the groove, a guide pipe perpendicular to the moving disc, and a moving disc motor which is connected with the moving disc and used for driving the moving disc to rotate in the groove. The fixed disc is provided with a circle of air guiding holes around the center of the moving disc, and the air guiding holes are evenly distributed. The moving disc is provided with a through hole, and when the moving disc rotates, the through hole can be communicated with the air guiding holes one by one. An elastic pipe head is arranged at the lower end of the guide pipe. The moving disc is provided with a power driving mechanism, wherein a power output end of the power driving mechanism is connected with the guide pipe, and the power driving mechanism is used for controlling the guide pipe to move along the through hole in the axial direction so that sealing between the elastic pipe head and edges of the air guiding holes is realized. The periodic gating unit for suction of the worms and the air and for the granary sampling analysis is reasonable in design and simple in structure, enhances the air tightness of an air suction pipeline, eliminates the air leakage situation and improves work efficiency and accuracy of gas detection results.

The invention discloses a heat preservation vinasse anaerobic fermentation device capable of air isolation, wherein the device comprises a fermentation box, an air sucking pump and a temperature regulating tank. The outer side of the fermentation box is provided with a constant temperature oven, and the upper left end of the constant temperature oven is connected with a high temperature waterway;the temperature regulating tank is arranged at the tail end of the high temperature waterway, and the interior of the temperature regulating tank is provided with a rotating shaft; the air sucking pump is arranged above the temperature regulating tank, and the right end of the temperature regulating tank is connected with a low temperature pipeline; a stirring shaft is arranged at the middle position of a separation plate, and the top end of the stirring shaft is connected with a motor; the bottom end of the fermentation box is connected with an observation pipe, and the interior of the observation pipe is provided with a plunger. The invention also discloses an operation method of the heat preservation vinasse anaerobic fermentation device capable of air isolation. The air sucking pump arranged on the heat preservation vinasse anaerobic fermentation device capable of air isolation can extract air in the fermentation box through a gas conveying pipe so as to achieve the purpose of airisolation, so the working efficiency of anaerobic strains is improved, and the practicability of the heat preservation vinasse anaerobic fermentation device capable of air isolation is greatly improved.

The invention relates to the field of air volume controlling, in particular to a medical air volume adjusting device. The medical air volume adjusting device is installed in a pipeline where air flowsand comprises a fixed control part and a changing control part; the fixed control part comprises a fixed plate radially arranged in the pipeline, a first ventilating hole is formed in the upper portion of the fixed plate, and an air volume adjusting hole is formed in the lower portion of the fixed plate; the changing control part comprises an adjusting plate which is located on the fixed plate downstream, and the middle of the adjusting plate is hinged to the pipeline; a plurality of second ventilating holes are formed in the upper portion of the adjusting plate, and the lower portion of theadjusting plate is provided with a tapered block used for cooperating with opening and closing of the air volume adjusting hole; an air transition cavity is formed between the fixed plate and the adjusting plate, and an exhaust passage is arranged in the adjusting plate in the radial direction and communicates with the air transition cavity; and a one-way valve is arranged at an inlet of the exhaust passage. Through the technical scheme, the effect that when the input air volume is too large, it is ensured that the air volume of a use terminal is within a normal range is achieved.

The invention provides an exhaust thermal energy environmental protection utilization device, and relates to the field of automobile environmental protection. The environmental protection utilization device comprises an automobile exhaust pipe, a metal hoop is arranged on the surface of the automobile exhaust pipe, an air inlet pipe is arranged at the lower end of the metal hoop, a filter screen is arranged inside the air inlet pipe, a filter cavity is formed in the lower end of the filter screen, a dust collecting box is arranged at the lower end of a screen falling valve, a heating chamber is connected to the other end of the air inlet pipe, a circulation cavity is formed in the heating chamber, a branch pipe is arranged on one side of the circulation cavity, a sensor module is arranged on the surface of the heating chamber, a temperature alertor is arranged on one side of the sensor module, a control chip is electrically connected with a control module, a proportional valve is arranged inside an air outlet pipe, an energy storage area is arranged at the lower end of a purification area, the air outlet pipe is fixedly connected with a drying oven through a catalyst chamber, the above mentioned current automobile exhaust discharge problems are solved, most of the automobile exhaust is discharged directly, the environment is polluted, the exhaust can generate a large amount of heat, the temperature rises, the temperature of this part is emptied directly, and great heat waste is caused.

The invention provides an automatic armrest, and belongs to the technical field of daily living equipment. The problem that an existing armrest is likely to fall off after being adsorbed is solved. The automatic armrest comprises a handle-shaped shell, and connecting openings are formed in the two ends of the shell. Suction cups are arranged on the two connecting openings, and the suction cups partially stretch out of the connecting openings. The automatic armrest further comprises a driving motor and a trigger, and the driving motor is connected in the shell and connected with the suction cups through a transmission mechanism. The driving motor drives the suction cups to move into the connecting openings after the trigger is triggered, and the end faces of the two ends of the shell are compressed on the corresponding suction cups correspondingly. The automatic armrest has advantage of being good in adsorption stability.

The invention discloses a drying device for crops. The drying device for crops comprises a movable box; a sliding groove is formed in the bottom of an inner cavity of the movable box; the two sides of an inner cavity of the sliding groove are each provided with a sliding rod, and the sliding rods are matched with each other; a positive and negative motor is arranged on the right side of the inner cavity of the movable box; the output end of the positive and negative motor is provided with a screw rod; the left side of the surface of the screw rod is provided with a screw sleeve; the left side of the screw sleeve is fixedly connected with the sliding rods; the top of the movable box is provided with a drying box; the top of each sliding rod penetrates the movable box and the drying box and extends into the inner cavity of the drying box; the tops of the sliding rods are provided with a drying net; the top of the drying box is provided with an air heater; and an air sucking pipe is arranged on the back side of the air heater. According to the drying device for crops, due to cooperation of the positive and negative motor, the screw rod, the screw sleeve, an air outflow head, the air heater, the air sucking pipe, an air outflow pipe, the sliding rods, a controller and sliding grooves, a uniform drying effect can be achieved on the crops when the drying device is used, and in this way, the effect is better when the drying device is used.

The invention discloses a medical apparatus placing box. The medical apparatus placing box comprises a placing box body; a dust remover is arranged at the top of the placing box body; a dust outlet pipe is arranged at an output end of the dust remover; dust sucking pipes are arranged at an input end of the dust remover, and are positioned on two sides of the placing box body; dust sucking ports are formed in the inner sides of the dust sucking pipes; the ends, far from the dust sucking pipes, of the dust sucking ports penetrate through and extend to an inner cavity of the placing box body; rotating shafts are arranged in inner cavities of the dust sucking ports; the connected places of the surfaces of the rotating shafts with the dust sucking ports are fixedly connected through a bracket;fan blades are movably connected to the surfaces of the rotating shafts; and a motor is arranged at the bottom of the inner cavity of the placing box body. Through cooperation of a placing plate, thedust sucking ports, the fan blades, the rotating shafts, the dust sucking pipes, the dust outlet pipe, the dust remover, a slide rail, the motor and a slide rod, the efficient dust removing effect canbe achieved on apparatus in the placing box; and the placing box is better in dust removing effect in use.

The invention provides an ultralow-temperature single-PP recyclable biscuit packaging film and a production process thereof, and belongs to the technical field of packaging. The packaging film comprises a BOPP printing film and a VMCPP film which are tightly attached, and the VMCPP film comprises a corona layer, a middle layer and a heat sealing layer which are sequentially stacked. The BOPP / VMCPP composite membrane prepared by the invention is a single PP material, is convenient to recycle, is simpler to recycle and process, and can better reduce environmental pollution and protect the environment; meanwhile, the composite film starts to be sealed at 70 DEG C, and compared with an existing packaging material, the sealing temperature is lowered by 35 DEG C, so that in the packaging process, energy consumption is low, more energy is saved, the heat sealing interval is wide, the heat sealing strength is high, and packaging can be conducted on a packaging machine more easily and conveniently; the composite film is low in melting point, the overall air tightness of a product can be improved, the situation of air leakage is avoided, and the requirement of a high-speed automatic packaging machine is met.

The invention provides processing equipment for a high-performance self-cleaning epoxy resin coating. The processing equipment for the high-performance self-cleaning epoxy resin coating comprises a machine shell, wherein a dust collection box is connected to the upper end of the machine shell in a clamping mode; a rectangular plate is connected to the upper end of the dust collection box in a clamping mode; a dust suction fan is fixed to the upper end of the rectangular plate through bolts; a belt cover is fixed to the left end of the machine shell; a circular plate is fixed to the lower end of the belt cover; a dustproof cover is fixed to the lower end of the circular plate; and a dust suction pipe is fixed to the front end of the dustproof cover. According to the invention, a connectingpipe on the surface of a box body can be well connected with the dust suction pipe, and fixed connection is prevented from being carried out through threads in taking-out and installation processes for the dust collection box, so that taking-out and fixing speeds for the dust collection box can be greatly increased; and meanwhile, a rubber ring on the surface of the connecting pipe can be well connected with the dust suction pipe in a sealed mode, and the situation of air leakage at the connecting position is avoided, so that the internal pressure of the dust suction pipe is guaranteed, and abetter dust suction effect is achieved.

The invention discloses a double-power pneumatic clutch, belonging to a power control device in the electromechanical industry. Front and rear end covers are arranged on a box body, front and rear input / output shafts are arranged between the front and rear end covers, and the two front and rear input / output shafts are connected by double bearings; a pressure plate and a supporting plate are arranged between the front and rear input / output shafts from outside to inside respectively, heat dissipation fan blades are arranged on the pressure plate, a bearing is arranged at the protruding end of the pressure plate, the outer end of the bearing is fixedly matched with a push plate, and front and rear tyres are arranged between the push plate and the front end cover; an inner spline steel plate,a wearing plate and a baffle plate are arranged on the rear input / output shaft; and the outer ring of the baffle plate is connected and matched with the supporting plates on the front and rear input / output shafts by inner spline gear rings. The air passage on a transmission shaft is directly fixedly connected from the end covers, so that frequent air leakage faults caused by abrasion of a pneumatic tap are avoided, the maintenance frequency of equipment is reduced, the stability is improved, and double-power linked drive is realized.

The invention discloses punching equipment capable of carrying out collection treatment on bearing scraps. The punching equipment comprises a bearing box. A workbench is arranged at the top of the bearing box. Leaking holes are formed in the surface of the workbench. A dust remover is arranged in an inner cavity of the bearing box. A dust suction pipe is arranged at the top of the dust remover. Movable bases are arranged on the two sides of an inner cavity of the dust suction pipe. A rotating rod is movably connected to the inner side of each movable base. Fan blades are arranged at the top and the bottom of each rotating rod. A dust suction head is arranged at the top of the dust suction pipe. The top of the dust suction head and penetrates and extends to the top of the bearing box to beconnected with the workbench, and an inner cavity of the dust suction head communicates with the workbench. According to the punching equipment, through cooperation of a controller, a dust outlet pipe, the fan blades, the rotating rods, the movable bases, the workbench, the leaking holes, the dust suction head, the dust suction pipe, the dust remover and a water tank, when the punching equipment is used, the function of automatic collection treatment can be achieved on the bearing scraps, and therefore the effect is better when the punching equipment works.

The invention discloses continuous detection equipment based on industrial flue gas. The equipment comprises a mounting frame fixedly mounted on a platform at the top of a reaction tower, wherein a control box and a detection unit which are fixedly mounted at the top of the mounting frame through connecting pieces, and an adjustable sampling mechanism fixedly mounted at the top of the reaction tower through a mounting assembly, and a continuous gas distribution mechanism is arranged in the control box. The invention relates to the technical field of flue gas treatment environmental protection equipment. According to the continuous detection equipment based on the industrial flue gas, the flue gas can be flexibly sampled, so the detection equipment can randomly extract the flue gas at different positions for detection, and the detection position can be well adjusted according to reagent detection requirements; therefore, detection personnel can more accurately detect the sulfide content and the dust particle concentration in the flue gas, sampling is flexible, and detection precision is greatly improved.

The invention discloses an air supply pipe joint leakage detection alarm device. The air supply pipe joint leakage detection alarm device comprises a sealing capsule, a piezoelectric plate, collecting rings and an alarm, and the sealing capsule wraps an air supply pipe joint; the piezoelectric plate is arranged on the lining of the sealing capsule; the collecting rings are arranged at the two ends of the piezoelectric plate; and the alarm is arranged on the outer side of the sealing capsule and is electrically connected with the collector rings. Air leakage of the air supply pipe joint is completely eradicated; leakage of an air supply pipe system in the running process of a vehicle is found in time, and alarm information is transmitted to the vehicle for centralized display; and compared with a traditional leakage checking method, environmental influence is avoided, the working efficiency is improved, the labor cost is reduced, and the labor intensity is reduced.

The invention discloses a vacuum arc-extinguishing chamber for reducing impact of a vacuum circuit breaker. The structure comprises a movable conducting rod, a weakened-impact arc extinguish chamber and a static conducting rod. The lower end of the movable conducting rod is arranged at the top end inside the weakened-impact arc extinguish chamber in an embedded manner. The upper end of the staticconducting rod is arranged at the bottom end inside the weakened-impact arc extinguish chamber in an embedded manner. A protection sealing ring sleeve on the inner wall impact protection mechanism isimpacted by the excessive impact force. One part of the impact force is consumed through the protection sealing ring sleeve. An inner wall flattening rod is driven by the impact force to be attached to the inner wall of the arc extinguish chamber to rotate. Therefore, the inner wall of the arc extinguish chamber is flattened, and the shell deformation of the arc extinguish chamber is avoided. Theservice life of the arc extinguish chamber is prolonged. Meanwhile, one part of impact force is conducted to the top end. At the moment, the part of the impact force is diffused through an impact diffusion plate at the bottom end of a corrugated pipe. The corrugated pipe is attached through a corrugated pipe impact protection mechanism. Therefore, the protection effect is achieved. It is guaranteed that the corrugated pipe cannot generate torsion. The air leakage failure of the arc extinguishing chamber is avoided.

The invention discloses a low-flow expiration cut-off device. The low-flow expiration cut-off device comprises a two-position two-way electromagnetic valve which is installed on an electromagnetic valve base, a porthole of the two-position two-way electromagnetic valve is connected to one end of a connection pipe, and the other end of the connection pipe is connected to an expiration mechanism ofa ventilator. The cut-off function of an experimental device, namely the small animal ventilator, is achieved in an expiration loop through the two-position two-way electromagnetic valve, the electromagnetic valve is quick in response, the positive end-expiratory pressure of the small animal ventilator can be quickly and efficiently controlled, the low-flow expiration cut-off device is excellent in cut-off performance, quick in response and simple in structure, the problems that a traditional pinch valve type expiration cut-off device is high in pipeline aging speed and short in maintenance period and easily causes harm to an experiment object are solved, and the device is long in service life, high in safety performance, and capable of being widely used in the field of biological experiments of scientific research institutions and colleges and universities.

The invention discloses a liquid floated gyroscope which comprises a shell, a rear shade, a corrugated pipe and a gasket, wherein the corrugated pipe and the gasket are fixedly connected into a whole. The liquid floated gyroscope is characterized in that the rear shade of the shell is externally provided with a rear cover, and the rear cover is glued with the rear shade; and the big end of a conical spring is sleeved in the rear cover, and the small end of the conical spring is sleeved on the gasket. Compared with the prior art, the liquid floated gyroscope provided by the invention has the advantages and beneficial effects that the conical spring is adopted, the small rigidity problem of the existing corrugated pipe is overcome, the rigidity is improved, the rear cover is glued with the rear shade, the occurrence of a gas leakage phenomenon is avoided, and the hermetic seal property of the gyroscope is improved.

The invention relates to a forming method of a large-size and large-thickness rigid aerogel component. The forming method comprises the following steps: a forming mold, a vacuum impregnation device, ashaped fiber body, a plurality of flexible cotton felts, a high-pressure kettle and sol are prepared; the shaped fiber body is arranged in the forming mold, and the vacuum impregnation device is added into a sol barrel; the forming mold is arranged on the vacuum impregnation device; the vacuum impregnation device is started for impregnation treatment; the forming mold is placed in the high-pressure kettle for supercritical drying; and the formed aerogel component is taken out and trimmed. By means of the method, the large-size and large-thickness rigid aerogel component can be manufactured very conveniently, the situations of uneven thickness, cracking, poor roughness and the like are avoided, the manufacturing quality of the aerogel component can be effectively improved, special vacuum impregnation equipment is not needed in the impregnation process, the method also has the advantages of simple operation, high sol dipping efficiency, high sol utilization rate, high processing efficiency, low cost and the like, and the method has more obvious advantages when being used for processing components with larger sizes.