49results about How to "Intake fast" patented technology

The invention discloses an air conveyor which comprises a body. The body internally comprises an air inlet chamber and an air outlet chamber which are communicated through an inner hole, a connecting pipe connected with the body is fixed at one inner end of the air inlet chamber, a valve plate is arranged at the position of the inner hole, a spring for compacting the valve plate is arranged between the valve plate and the connecting pipe, and a flowing hole communicated with the air outlet chamber is arranged on the side wall of the air inlet chamber. The body further comprises the air cylinder, the air cylinder comprises a cylinder block integrated with the body, a sealed end cover is matched at the other end of the cylinder block, a piston is slidably arranged in the cylinder block and is connected with the valve plate through a connecting rod, an air inlet end of the air cylinder is communicated with the flowing hole through a through hole, and the cross section of the valve plate is smaller than the area of the piston. The air conveyor has the advantages that the air conveyor is capable of monitoring pressure conditions in a conveying pipeline in real time and capable of supplementing air to increase inlet air when the pipeline is blocked, so that conveying capability is improved, and conveying cost is reduced. The air conveyor is capable of achieving totally-closed material conveyance, and secondary contamination to materials is avoided.

The invention relates to a dynamic engine and aims at providing a pneumatic internal combustion hybrid engine. The engine comprises at least one pneumatic motor, at least one internal combustion engine and a high-pressure air tank, wherein the outlet pipeline of the high-pressure air tank is connected to the air inlet pipe of the pneumatic motor through a check valve and a pressure regulating mechanism; the air inlet pipe of the internal combustion engine is respectively connected with the exhaust pipe of the pneumatic motor and an air inlet; and a pneumatic motor crankshaft and an internal combustion engine crankshaft are connected in a sub-crankshaft mode through a crankshaft coupling mechanism. The hybrid engine provided by the invention has the advantages that air can be exhausted by fully utilizing the high pressure and lower temperature of the pneumatic motor, a supercharging effect can be formed for the internal combustion engine, and the size of the intercooler of the air intake system of the internal combustion engine can be reduced appropriately; and the pneumatic motor and the internal combustion engine are connected in a sub-crankshaft coupling mode so as to output motive power externally, thus the pneumatic motor and the internal combustion engine can operate on the respective optimal regions.

The invention discloses a charging nozzle of an inflation pump, used on an upper threaded part of a French nozzle. The charging nozzle comprises a center pipe seat, an outer shell and a nozzle cover, wherein a center hole is arranged at one end of the center pipe and connected with a charging pipe of the inflation pump, and a cavity is arranged at the other end; the inner edge of one opening at one end of the outer shell is provided with an inner fixed part, the other end of the outer shell is provided with a through hole, and the inside diameter of the outer shell is an outer ring sleeved on the center pipe seat; the outer circular surface of the nozzle cover is provided with a first ring groove corresponding to one end of the cavity, and the first ring groove is provided with an elastic gasket; the outer circular surface of the nozzle cover is additionally provided with an outer fixed part in threaded connection with the inner fixed part so that part of the nozzle cover is arranged in the cavity; the inner circumference of the nozzle cover is provided with an inner threaded pipe for the threaded part of a tire nozzle to be threaded in, the end of the inner circumference of the nozzle cover, which corresponds to the tire nozzle, is provided with a second circular groove, and the second circular groove is provided with an elastic gasket. The charging nozzle can be taken and used randomly by a consumer with special need.

The invention discloses a reaction cavity. The reaction cavity comprises a closed cavity body and a flat plate heater assembly, wherein the cavity body consists of a lower spacer, a side wall and an upper cover plate, the flat plate heater assembly is arranged in the cavity body, a flow equalizing plate is arranged between the upper cover plate and the flat plate heater assembly, a flow equalizing cavity is formed between the flow equalizing plate and the upper cover plate, an air inlet assembly is arranged on the upper cover plate, an air outlet of the air inlet assembly is communicated with the flow equalizing cavity, and an air flow baffle is arranged in a position which is of a certain distance from the air outlet of the air inlet assembly. The technical gas of the reaction cavity is equalized twice before entering the reaction cavity. The reaction cavity has the advantage that the technical gas enters at a high speed and is evenly distributed. The technical quality is improved, and the film forming quality of a semiconductor material is improved. As the technical gas directly enters the reaction cavity from the top of the cavity, the speed that the technical gas enters the reaction cavity is increased.

The invention provides an exhausting braking system, which comprises an engine, an electronic electric unit, air inlet pipe and an air outlet pipe, wherein the engine is respectively connected with the electronic electric unit, the air inlet pipe and the air outlet pipe; the system further comprises a pressure released gas control device which is respectively connected with the electronic electric unit, the air inlet pipe and the exhaustion pipe by pipes. In the exhausting braking system provided by the invention, excessive gas at high pressure from the exhaustion pipe are recycled by the pressure released gas control device, which means that the excessive compressed air produced in exhausting and braking and to be discharged can be returned to the air inlet pipe by a serial of control elements; the air inlet of the air inlet pipe is improved; the exhausting braking efficiency is improved; and the time for exhausting braking is reduced.

The anti-knock energy saving engine includes one solenoid valve controlled gas valve opening and closing mechanism and one knock preventing mechanism to spray water regularly to the engine cylinder. The gas valve opening and closing mechanism includes crankshaft rotation angle sensor and solenoid valve. The crankshaft rotation angle sensor has timing rotor and N crankshaft angle detecting coils around the timing rotor. The detecting coils are connected electrically to the solenoid valve coil so as to control the opening and closing of the gas valve. The water spraying knock preventing mechanism has water pump connected to the steam generator, steam generator mounted on the heat supplying exhaust manifold, and nozzle connected to the steam generator to spray water regularly to the cylinder for preventing knock. The present invention has solenoid valve to replace gas distributing mechanism in engine and has the advantages of simple structure, small size, etc.

The invention provides a superplastic forming / diffusion bonding grid coordinated forming method of a four-layer structure. The method comprises the followings steps: step I, setting the position of a main air inlet air course; step II, sequencing all grids according to the distance from the main air inlet air course to each grid; step III, setting the width of each grid air course; step IV, air intake forming. By adopting the method, in the process that a core veneer forms the grids, the air course route of the grid which is far away from the main air inlet air course is more direct, and the expansion beginning time of the grids with different distances to the main air inlet air course get close to each other as far as possible. The width of the air inlet air course of the grid which is farther away from the main air inlet air course is greater, the air is rapider to feed, the width of the air inlet air course of the grid which is nearer to the main air inlet air course is smaller, the air is slow to feed, the forming degree of the grids on different positions is also enabled to be close to each other as far as possible on the aspect of the air intake speed, and the coordinated forming can be realized.

The present invention relates to a high power microspeaker having a separate sub-diaphragm on a top end surface of a coil, in addition to a diaphragm and a suspension. The present invention provides astructure in which an acoustic system including a main diaphragm and a conductive suspension of a microspeaker is attached to a top end surface of a coil and a separate sub-diaphragm is attached to the same surface of the coil.

The invention discloses an adjustable, optimized and energy-saving ventilation and noise reduction device of a cooling tower. A tower body is of a hollow cuboid frame structure; partition walls are arranged on the two sides of the tower body respectively; an air inlet silencer is arranged in the partition walls; a treatment bin is arranged at the bottom in the tower body; air ducts are arranged atthe top of the treatment bin; the air ducts are each of an inverted-cone-shaped structure; an arc-shaped cover is arranged at the bottom of the corresponding air duct; an exhaust port is formed in the top of the corresponding air duct; an exhaust fan is arranged in the corresponding exhaust port; exhaust cylinders are arranged at the top of the tower body; the air inlet silencer is composed of aplurality of oval wing blades which are sequentially arranged at intervals from top to bottom; and the wing blades are filled with sound absorption cotton layers. According to the adjustable, optimized and energy-saving ventilation and noise reduction device, the wing blades are designed to be oval, the air ducts are designed to be of an inverted-cone-shaped structure, and the fans are arranged atthe exhaust ports, such that the air inlet efficiency and the air outlet efficiency are improved, and the aerodynamic performance is excellent; and meanwhile, sound absorption materials are arrangedin the partition walls and the wing blades, and the air inlet efficiency is controlled by adjusting opening and closing of the wing blades.

The invention provides an air sealing body. According to the air sealing body, two communicated or non-communicated heat-resisting areas or a netted air inflow mode is utilized to achieve rapid air inflow. The air sealing body comprises two outer membranes and two inner membranes, the top end of the face, facing the other inner membrane, of one inner membrane is continuously coated with a heat-resisting material line, and then the lower part of the heat-resisting material line is coated with a heat-resisting material at equal intervals to serve as an air inflow channel; the inner membranes and the outer membranes are bonded with a heat sealing line rather than heat sealing points. Besides, thermoplastic elastomer POE can be arranged on the opposite faces of the inner membranes, and no thermoplastic elastomers POE is added to the other faces of the inner membranes; in the inflating process, the heat sealing line is pulled apart at the outer membrane parts due to expansion, and all air inflow openings are opened for rapid inflation; when air injection is completed, the two inner membranes with the thermoplastic elastomers POE added can be further used as sealing air valves and can be automatically sucked and tightly attached to achieve automatic sealing.

The invention discloses a novel tail water tunnel ventilation hole structure. The structure comprises a ventilation hole, a movable baffle plate, a movable connecting rod, a spring, a buffer device, an annular antiskid block body and a clamping groove. The ventilation hole is a two-way ventilation hole; when negative pressure is generated in a tail water tunnel, air enters the ventilation hole from external, air currents can eject up the movable baffle plate, the movable baffle plate drives the movable connecting rod to move along the inclined upper side, and at this time, the movable baffle plate is totally opened, the intake area is maximal, the air replenishing speed is quicker, and the negative pressure of the tail water tunnel can be timely relieved; and when the tail water tunnel is exhausted, pressure of reverse air currents can enable the movable baffle plates to move along the inclined lower side, the movable baffle plate is engaged with the clamping groove, the ventilation hole is closed, the air currents are exhausted from round holes reserved in the movable baffle plate, and the exhaust speed is slower, so that the transient pressure is largely reduced when air masses are exhausted out of the hole. The structure can largely relieve the negative pressure in the tunnel in air suction and the collision pressure in air exhausting under the precondition of satisfying other safety and reliability requirements, and in particular, is prominent in effect for the tail water tunnel of a hydropower station and a city pipe network.

The invention discloses a metal plate polishing device, and relates to the technical field of metal machining machines. The metal plate polishing device comprises a base, wherein a vertical plate is vertically arranged on the base, a motor is fixedly installed on the vertical plate, a polishing disc is fixedly installed on a rotating shaft of the motor, a bracket is arranged on the lower side of the polishing disc, the polishing disc comprises a rotating wheel, first supporting columns and second supporting columns, a through hole is formed in the middle of the rotating wheel, a plurality of cavities are annularly distributed in the rotating wheel, the cavities are located on the outer side of the through hole, and meanwhile the cavities communicate with the through hole through communicating grooves; and a plurality of telescopic first supporting columns are installed on the rotating wheel in a sliding mode, the ends of the first supporting columns extend into the cavities, and meanwhile every two adjacent first supporting columns are connected through the corresponding second supporting column. According to the metal plate polishing device, when the surface of a workpiece and the polishing disc are extruded, the first supporting columns are pushed to contract, installation frames in the contracted first supporting columns push elastic connecting rods to contract, the contracted elastic connecting rods push two pull rods to be gathered together, and therefore the second supporting columns are pushed to extend out, an abrasive belt is tensioned through the extending-out elastic connecting rods, and the problem that the abrasive belt is loosened and falls off in the contracting process is avoided.

The invention discloses an air purification device with a filter screen plate employing nano photocatalyst disinfection. The air purification device comprises an air inlet mechanism and a treatment mechanism, wherein the treatment mechanism is arranged at one end of the air inlet mechanism; a fixing block and a pushing block are arranged in a guide rail groove; a spring and an electric push rod are both fixedly installed between the fixing block and the pushing block; the fixing block is connected with the pushing block through the spring and the electric push rod; a stop block is fixedly installed at the bottom of the guide rail groove; a locking part is arranged on the outer surface of the fixing block; the fixing block is connected with the guide rail groove through the locking part; asleeving ring is fixedly installed at one side of the pushing block; and the pushing block is connected with a connecting pile through the sleeving ring. Through extension and retraction of the electric push rod, the pushing block can generate relative displacement, so that an air bag can move, nearby air is introduced into an air bellow, the purpose of accelerating air inflow is achieved, and theair purification efficiency is improved.

The invention provides a rock collision test device, which comprises a rack, a rodless cylinder, a gas storage tank, a vacuum holding assembly, an upper intake and exhaust assembly, a lower intake andexhaust assembly, an air compressor, a collision assembly, a first photoelectric sensor, a high-speed camera, a controller, and also includes a rebound protection assembly. The rock collision test device provided by the invention utilizes the rodless cylinder, the upper intake and exhaust assembly and the lower intake and exhaust assembly to realize adjustment of rock collision velocity, and canacquire a high collision velocity, utilizes the rebound protection assembly to strictly control the number of times of collision, utilizes the collision assembly to realize adjustment of the collisionangle, utilizes the vacuum holding assembly to hold spheres and cylinder impact blocks of various sizes, and utilizes an electrical control structure to achieve high precision control, and has the characteristics of simple operation and strong practicability.

The invention provides an exhausting braking system, which comprises an engine, an electronic electric unit, air inlet pipe and an air outlet pipe, wherein the engine is respectively connected with the electronic electric unit, the air inlet pipe and the air outlet pipe; the system further comprises a pressure released gas control device which is respectively connected with the electronic electric unit, the air inlet pipe and the exhaustion pipe by pipes. In the exhausting braking system provided by the invention, excessive gas at high pressure from the exhaustion pipe are recycled by the pressure released gas control device, which means that the excessive compressed air produced in exhausting and braking and to be discharged can be returned to the air inlet pipe by a serial of control elements; the air inlet of the air inlet pipe is improved; the exhausting braking efficiency is improved; and the time for exhausting braking is reduced.

The invention discloses an aluminum silicon tempered glass low-temperature fatigue detecting device. A pressure difference is formed through conversion of air pumping and air inflation so that tempered glass carries out reciprocating deformation and bending under stress, and at the same time, a low temperature formed by vacuum extraction air compression is combined to form a low temperature environment through an effect of a refrigerant, and then fatigue detection is performed by the device. Bending detection is performed on a whole plane of the glass in a reciprocating mode so that detectionis more comprehensive. A refrigerant baffle ring is placed at a middle position of a pedestal, an inner diameter of the refrigerant baffle ring is gradually increased from bottom to top, and a main body cover is placed outside the refrigerant baffle ring. A bottom end of the main body cover is provided with a sealing press plate, and is pressed on the pedestal. A sealing ring is arranged between the sealing press plate and the pedestal. A top of the main body cover is an arc structure, and a limiting ring is placed on an inner wall of the main body cover. An annular clamping slot is formed onthe limiting ring, a width of the annular clamping slot is gradually reduced from the outside to the inside, and a rubber pad is arranged on a slot wall of the annular clamping slot. A pressing sleeveis arranged on the inner wall of the main body cover and is screwed to the main body cover.

The invention discloses a fast air inlet system for a lifting air cylinder of a shock test table. The lifting air cylinder comprises a cylinder body and a piston, and the piston is connected to a side wall of a working chamber in a dynamic sealing and vertical sliding mode. The fast air inlet system comprises an air storage chamber, an air distribution channel and a plurality of air inlet assemblies; each air inlet assembly comprises a ventilation control chamber, a sealing plug connected to the ventilation control chamber in a dynamic sealing and sliding mode and a ventilation port formed in the side wall of the ventilation control chamber. When the fast air inlet system carries out shock tests, air does not need to be guided into a forward working chamber before the shock tests and just needs to be fast sucked when a hydraulic lock rod mechanism unlocks a piston rod, and therefore the hydraulic lock rod mechanism just receives the self weight load of a shock table board when locking the piston rod, the specification of the shock table board can be larger, and the large-diameter piston rod can be reliably locked by the hydraulic lock rod mechanism even if the diameter of the piston rod is increased.

The invention discloses a pneumatic type bidirectional linkage device. The pneumatic type bidirectional linkage device is simple in structure and easy to implement. A bearing is located in the middleof the interior of a cylinder body, so that the middle of a left threaded rod and the middle of a right threaded rod are rotationally connected conveniently, and the left threaded rod and the right threaded rod extend towards the two ends conveniently. The bearing is arranged, so that piston parts on the left threaded rod and the right threaded rod are not prevented from extending outwards throughlimiting flanges, and the practicability is good. A linear guide mechanism is arranged, so that linear guide of the movement of connecting blocks and the piston parts is facilitated. The left threaded rod and the right threaded rod are arranged, so that the piston parts at the two ends of the left threaded rod and the two ends of the right threaded rod can synchronously move towards each other and synchronously move away from each other, and the connecting blocks at the two ends can synchronously move towards each other and synchronously move away from each other. The pneumatic type bidirectional linkage device is suitable for some application scenarios. A first airflow inlet and outlet channel and a second airflow inlet and outlet channel are arranged, so that the air inlet and outlet ofthe cylinder body are facilitated.

The invention discloses a cooking utensil with a liner suction prevention function, which comprises a pot body, wherein a liner is arranged in the pot body; and a cooker cover which is provided with asealing ring, wherein the sealing ring comprises a sealing ring body and a lower lip edge, the lower lip edge is provided with an upper sealing part and a lower sealing part, one end of the upper sealing part is fixedly connected with the sealing ring body, the other end of the upper sealing part is fixedly connected with the lower sealing part, and a groove is formed in the side, facing the inner container, of the upper sealing part. A plurality of convex ribs capable of being matched with the inner wall surface of the inner container in a sealing manner are arranged in the groove, and an air guide gap is formed between every two adjacent convex ribs. After the convex rib is pressed upwards in the inner container, sealing can be formed between the convex rib and the inner container underthe action of gas pressure in the inner container, so that the sealing performance of the sealing ring is improved, the convex rib restores to the original shape under the action of elastic force ofthe convex rib after pressure relief, the gas guide gap is opened, and external gas flows into the inner container through the gas guide gap at the moment of cover opening; negative pressure in the container is rapidly eliminated, and rapid uncovering is facilitated.

The invention relates to a parking brake assembly (1) for an electronically controllable pneumatic brake system (204) for a utility vehicle (202), comprising a parking brake unit (2) which has an accumulator connection (4) for receiving an accumulator pressure (pV), a brake request connection (6) for receiving a parking brake request (pPBV, SP), and a parking brake connection (8) for providing a parking brake pressure (pF). An ABS valve assembly (10) is provided which has a first ABS valve unit (12) for a first channel (16a) and a second ABS valve unit (14) for a second channel (16b). The first ABS valve unit (12) receives the parking brake pressure (pF) and provides a first brake pressure (pB1) on the first channel (16a), and the first ABS valve unit (12) is designed to ventilate the first channel (16a) at least in stages. The second ABS valve unit (14) receives the parking brake pressure (pF) and provides a second brake pressure (pB2) on the second channel (16b), and the second ABS valve unit (12) is designed to ventilate the second channel (16b) at least in stages.

The invention relates to an air control valve mounted in a pneumatic actuator. The air control valve comprises a valve body, wherein a switching cavity as well as a first channel, a second channel and a third channel which are respectively communicated with the switching cavity, a first switching hole communicated with the switching cavity is formed in one end of the first channel, the other end of the first channel is an air source mounting hole, a communicating hole communicated with the switching cavity is formed in one end of the second channel, the other end of the second channel is a non-spring cavity mounting hole, a second switching hole communicated with the switching cavity is formed in one end of the third channel, the other end of the third channel is a spring cavity mounting hole, a main valve element moving according to air pressure is arranged in the switching cavity, an exhaust channel communicating the second channel with the outside is arranged in the valve body, and a unidirectional circulation assembly only allowing gas to flow to the outside from the second channel is arranged in the exhaust channel. By adopting the scheme, the air control valve provided by the invention has the advantages that air suction from the outside due to a spring cavity is avoided and internal components can not be corroded.

The invention discloses an anti-liner-suction cooking utensil which comprises a pot body, wherein a liner is arranged in the pot body; and a cooker cover which is provided with a sealing ring, whereinthe sealing ring comprises a sealing ring body, a lower lip and an upper lip, one end of the lower lip is fixedly connected with the sealing ring body, the other end of the lower lip extends downwards, at least part of the lower lip can be in sealing fit with the inner wall face of the inner container, one end of the upper lip is fixedly connected with the sealing ring body and / or the lower lip,and the other end is a free end; when the cooker cover is in a state of buckling the cooker body, the upper lip edge is provided with a first position which abuts against the inner container to seal the inner container and a second position which moves towards the lower lip edge to be separated from the inner container so that an air inlet gap can be formed between the upper lip edge and the innercontainer. Due to the structural design of the sealing ring, when the cover is opened, external air can quickly enter the inner container through the gap between the sealing ring and the inner container, so that negative pressure is eliminated, the inner container is prevented from being sucked, and a user can open the cover conveniently.

The invention discloses a direct-acting oxygen generation valve, and belongs to the technical field of oxygen generation valves. The direct-acting oxygen generation valve comprises a confluence plate and valve groups; the confluence plate is provided with an air inlet channel, an air outlet channel, an exhaust channel and a connecting channel, the air inlet channel is connected with an external compressor, and the air outlet channel is connected with an external molecular sieve; and the number of the valve groups is at least one, the valve group comprises an air inlet valve and an exhaust valve, the air inlet valve and the exhaust valve are both connected with the confluence plate, the air inlet channel, the air inlet valve, the connecting channel, the exhaust valve and the exhaust channel are communicated in sequence, and the air outlet channel is communicated with the connecting channel. The whole oxygen generation valve can be started at zero air pressure, each valve group can independently regulate the pressure to achieve the purpose of staggered output, so that the adaptability of the whole oxygen generation valve is improved, the pressure of gas output into the molecular sieve can be kept constant through pressure adjusting, the gas pressure requirement of the oxygen generator is met, the good oxygen generation capacity of the oxygen generator is ensured, and the oxygen concentration is improved.

The invention discloses an oil filter bypass valve opening pressure gas detection device, which includes a base, a lower mold fixedly installed on the base, a gasket arranged between the lower mold and the base, and a The top inflatable disk, the cylinder connected to the top of the piston rod and the inflatable disk, and the gas path. The invention adopts the air-inflated disk to apply pressure to the spring of the bypass valve. When the external air-intake pressure is greater than the spring force, the bypass valve is opened to realize rapid air intake; the invention uses a cylinder to press the inflatable disk to the lower mold Above, the two are sealed and connected, and the gas will not flow out from the gap between the two when the inflatable disc is inflated. The invention uses air as the test medium for testing, and the device has small volume, simple structure, and is convenient to use, and can be tested at normal temperature, and parts of bypass valves that pass the test can be used, and the device investment cost and detection cost are low.

The invention provides a gas burner and a metal smelting furnace. The gas burner comprises a hollow burner body, the burner body is tubular, one end of the burner body is provided with a burner head, the burner body is provided with a gas inlet, a gas spray hole and an air inlet hole, and the gas inlet comprises a normal-pressure gas inlet and a high-pressure gas inlet. The burner head and the high-pressure gas inlet are oppositely arranged and located at the two ends of the burner body respectively, the pressure of the high-pressure gas inlet ranges from 0.05 MPa to 0.4 MPa, in the temperature rising stage, flowing of gas in the furnace is accelerated, the temperature rising speed in the furnace is remarkably increased, the furnace temperature is more uniform, and in the heat preservation and heating stage, namely when the temperature in the furnace reaches 700 DEG C or above, high-pressure fuel gas is intermittently injected, gas flow in the furnace is accelerated, high-temperature gas mass is dispersed and the furnace temperature is uniform, the air-fuel ratio is reduced by the high-pressure fuel gas, the oxidation burning loss of metal is reduced, the waste gas amount is also reduced, the energy is saved, the environment is protected, the heating and smelting efficiency is improved, and the production cost is reduced.

The invention provides a valve device for improving the door opening and closing speed of a coating transition chamber, and belongs to the technical field of coating glass production. The valve devicesolves the technical problems of low coating efficiency of existing coating equipment and the like. The valve device for improving the door opening and closing speed of the coating transition chambercomprises a main valve body, an auxiliary valve body connected with the main valve body and a packing leather piston located between the main valve body and the auxiliary valve body, the main valve body is provided with an air inlet and a working opening, the auxiliary valve body is provided with an exhaust opening, and the packing leather piston is provided with a main air inlet hole penetratingthe working opening and the air inlet; and a pre-tightening spring is arranged between one side face of the packing leather piston and the main valve body, the exhaust opening in the auxiliary valvebody can be shielded by the other side face of the packing leather piston, the main valve body is provided with a step face, and the step face can shield the packing leather piston when the packing leather piston moves downwards to communicate the working opening and the exhaust opening. The valve device has the beneficial effects of being efficient in air inlet and exhaust, simple and reliable instructure and the like.