2666 results about "Air cushion" patented technology

The invention relates to the technical field of wharf loading and unloading, and discloses a bulk grain wharf ship loading and unloading dual-purpose machine which comprises a conveyor main body and a frame, a discharging hopper is fixedly connected to the top of the conveyor main body, the bottom of the conveyor main body is rotationally connected with the outer wall of the frame, and a supporting frame is rotationally connected to the bottom of the conveyor main body; when a ship needs to be unloaded, a conveying pipeline enters a cabin through a moving assembly, then when a first motor is started to enable a rotating rod to rotate, a connecting rod can be driven to rotate, a concave-convex ring rotates, an extrusion pushing assembly ascends and extrudes gas, and finally high-pressure gas is sprayed out towards grain particles and permeates into gaps of the grain particles to form an air cushion effect; the friction force among grain particles is reduced, the mobility of the grain particles is enhanced, the grains are conveniently conveyed by the spiral auger, the situation that the grains are accumulated at the bottom of the spiral auger due to poor mobility of the grain particles, the grains are extruded and are prone to being damaged is effectively prevented, and the integrity of the grain particles is ensured.

The invention provides a new class of transportation with a partially aerostatically supported ram air cushion ship (PASRACS) that can provide safe, fast, efficient global transport services with extraordinary comfort, luxury and amenities. The PASRACS employs inventive synergistic combinations of lift from aerostatic, aerodynamic, hydrostatic and hydrodynamic forces for different modes of operation ranging from a stationary floating configuration on a water surface, to flight in ground effect at high speed. A propulsion system can utilize hydrogen as an energy source driving fluid-dynamic thrusters, to enable zero carbon emissions operations. A transition method is provided for a PASRACS to transition from a floating mode to a takeoff mode to a flight in ground-effect mode in an inventive optimized manner. A transport method for multimodally transporting payload is provided with PASRACS vehicles and systems, with quick turn time operations enabled by the use of payload transfer transport modules and transfer vehicles.

The invention relates to the field of gas-water separation, in particular to a gas-water separation device which comprises a separation device body, a gas-water input pipe is arranged at the bottom of the side end of the body, a horizontal cavity is formed in the body, a plurality of dehumidification air cushions arranged side by side are arranged in the horizontal cavity, and horizontal filtering baffles are fixedly installed at the lower ends of the dehumidification air cushions. The gas-water separator combines a baffle type and a centrifugal type for gas-water separation, so that the separation efficiency is greatly improved. And through cooperative control of the humidity sensor and the temperature sensor, accurate gas-water separation management is realized. The humidity control part ensures that gas enters a proper separation area by switching baffle plate paths, and the temperature control part heats through an electrothermal film and cools through a heat dissipation copper sheet, so that the gas-water separator always operates in an optimal temperature interval. In combination with a lag control mechanism, the system can effectively avoid frequent switching caused by environmental humidity fluctuation, reduce energy consumption, prolong the service life of equipment, and ensure long-term stable operation of the fuel cell system.

An air mattress and a production method of an air mattress are provided. The air mattress includes a first sheet and a second sheet, where the first sheet includes a first surface sheet; a periphery of the first surface sheet is provided with multiple first side sheets; the multiple first side sheets are integrally formed with the first surface sheet; adjacent side edges of each two adjacent first side sheets are connected, such that the multiple first side sheets are sequentially connected to form a first enclosing sheet; and the second sheet is connected to an end of the first enclosing sheet away from the first surface sheet.

A testing device and a testing method of a composite blade tilt rotor power assembly are related. The testing method includes the following steps: installing a tilt rotor flight power assembly on a flange platform of a testing device through a connector; confirming normal operation of an external power supply, the tilt rotor flight power assembly and a data acquisition computer; starting the tilt rotor flight power assembly, and controlling a tilt motor to rotate a cantilever shaft according to a tilt angle instruction; and recording the energy consumption and the tensile forces and torques in x, y and z directions of the tilt rotor flight power assembly by the data acquisition computer in real time. The testing method has the beneficial effects that the processes of starting, starting and stopping, hovering and descending can be simulated for the composite blade tilt rotor power assembly which is a core driving component of a vertical take-off and landing type electric driving hovercar, and the flight performance of the hovercar can be tested. The testing method can also be used for cold rotation test, take-off strategy verification test, hover strategy verification test, durability test and acceleration performance test of the composite blade tilt rotor power assembly.

The present invention discloses a device for a liquid-assisted sealed air cushion to support a rotor. The present invention utilizes the centrifugal force acting on the lift disc during rotation, and the liquid assists in sealing the air cushion, reducing the gas leakage amount. Compared with sealing forms such as carbon rings, the sealing effect is better and the cost is lower. Specifically, after the lift disc rotates, the liquid enters the liquid sealing cavity. Under the action of the centrifugal force of the liquid and the hindering effect of the liquid and the gas-blocking packing, the liquid assists in sealing the air cushion, which can reduce the gas leakage amount in the air cushion chamber. The present invention realizes the function of sealing the air cushion well at low cost.

The invention provides a preparation method of an Al-Mg-Mn-Sc series aluminum alloy plate. The preparation method comprises the following steps: S1, carrying out hot rolling on an Al-Mg-Mn-Sc series aluminum alloy cast ingot; s2, the hot-rolled aluminum alloy plate is pre-annealed and then cold-rolled for the first time; s3, carrying out intermediate annealing on the cold-rolled aluminum alloy plate, and then carrying out secondary cold rolling; and S4, the aluminum alloy plate obtained in the step S3 is subjected to air cushion furnace rapid annealing. The invention further provides application of the aluminum alloy plate prepared through the method. According to the preparation method of the Al-Mg-Mn-Sc series aluminum alloy plate, through accurate component regulation and control and process optimization, the strength of the aluminum alloy plate is improved, and the mechanical property of the aluminum alloy plate is not obviously reduced under the 280 DEG C brazing machining condition.

1. The name of this design product: Comb (air cushion). 2. Purpose of this design product: used for combing hair. 3. The key point of the design of this product lies in its shape. 4. The picture or photo that best illustrates the key points of the design: Design 1 Stereoscopic Drawing 1. 5. Designate Design 1 as the base design.

The invention provides a landing and life-saving system adaptive to a non-fully-coated single aircraft. The landing and life-saving system comprises a helmet for wearing, a flying suit connected with the aircraft and used for wearing, and a plurality of mechanical feet mounted on the aircraft, the helmet comprises a shell and a non-trigger air cushion arranged in the shell, and a visual window is arranged on the front side of the shell; the flying suit comprises a vest, a back air bag installed on the back of the vest, a thoracico-abdominal air bag installed on the front portion of the vest and a gas generator connected with the air bags through pipelines, the gas generator is installed on the vest or the aircraft, and a trigger switch for inflating the air bags is arranged on the gas generator. The mechanical foot comprises a supporting rod, a rotating rod and a mounting block, the mounting block is connected to the aircraft, one end of the rotating rod is rotationally connected with the mounting block or the aircraft, one end of the supporting rod is rotationally connected with the other end of the rotating rod, and the other end of the supporting rod serves as a supporting foot. The system is used for assisting normal flight landing of a manned flight non-coated single aircraft, and realizes forced landing and lifesaving.

The embodiment of the invention provides a nurse station ward information collection method and system based on a wireless network. A flexible electronic skin network is integrated in a patient mattress, pressure and temperature data are captured through distributed piezoresistive units, a multi-modal thermodynamic diagram is generated, and data synchronization is achieved through a wireless ad hoc network protocol. And driving an air cushion bed actuator to perform gradient compensation according to a matching result of the pressure gradient track and the physiological parameters, transmitting a compressed hierarchical data packet to a nurse station gateway by adopting a remote wide area network protocol, reconstructing a three-dimensional pressure model and generating an early warning instruction. According to the technical scheme provided by the embodiment of the invention, the occurrence probability of health problems such as bedsore caused by long-time bed lying is remarkably reduced, and the nursing quality of the patient is improved.

The invention relates to the technical field of vibration tests, in particular to a ground resonance test suspension device and a test method. The ground resonance test suspension device is provided with a bearing frame body, a hoisting mechanism, a bearing mechanism and a suspension mechanism, the bearing frame body is composed of a bearing supporting column, a cross beam and a longitudinal beam, and the position of the cross beam can be adjusted; a bracket of the bearing mechanism is provided with a bottom beam, an auxiliary supporting beam and a supporting beam, and a flexible air cushion is arranged on the supporting beam. A flexible supporting unit of the suspension mechanism is provided with a main spring rope, an upper hanging scaffold, a lower hanging scaffold and an auxiliary spring rope, and an auxiliary spring rope connecting unit can control the state of the flexible supporting unit. The invention further provides a ground resonance test method which comprises the steps of suspension pretreatment, aircraft suspension and test, and the equivalent stiffness of the suspension mechanism can be adjusted. The aircraft suspension system can adapt to different aircraft sizes and weight distribution, and the equivalent stiffness of the whole suspension system can be adjusted to meet the test support frequency requirement.

The invention discloses an air cushion belt dynamic balance control system and a management and control method, and belongs to the field of air cushion belt conveyors. Original signals of a sensor are obtained, a Fluent noise filtering algorithm is used for eliminating airflow interference, synchronous tension and air pressure data are aligned through timestamps, a reliability model is used for filling temperature field missing values, and standardized data streams are formed; based on the standardized data flow, analyzing an air pressure gradient by means of a fluid mechanics equation, extracting abnormal vibration modal characteristics of the carrier roller, calculating a fluctuation coefficient in combination with tension simulation, and obtaining a multi-dimensional parameter set containing dynamic distribution of a pressure field and a belt deviation angle; inputting the multi-dimensional parameter set into the digital twin, updating the fatigue damage parameters of the belt through Fluent simulation driving, rendering the visualization result of the flow field of the air chamber in real time, and outputting a simulation result containing the dynamic cloud picture of the pressure field of the air chamber and the fatigue damage distribution of the belt; and calculating the pressure balance degree of the air chamber according to a simulation result.

The invention relates to the technical field of carbon fiber prepreg cloth production, and discloses a low-gram-weight yarn spreading device for carbon fiber prepreg cloth, which comprises a rack, and a modular yarn releasing unit, a hot roller yarn spreading unit and an airflow auxiliary yarn spreading unit which are arranged on the rack, the hot roller yarn spreading unit comprises at least three hot roller groups, the airflow auxiliary yarn spreading unit comprises an airflow nozzle assembly and an airflow buffer plate which are oppositely distributed up and down, the airflow nozzle assembly sprays airflow and is used for transversely pushing away fibers to assist yarn spreading, and the airflow buffer plate releases the airflow to form an air cushion to buffer yarn tension fluctuation. According to the low-gram-weight yarn spreading device for the carbon fiber prepreg cloth, the hot roller yarn spreading unit and the airflow auxiliary yarn spreading unit cooperate, efficient yarn spreading is achieved, meanwhile, the airflow buffer plate releases low-pressure airflow, an air cushion is formed, tension fluctuation is absorbed, and the yarn breaking rate is reduced.

The invention belongs to the technical field of aluminum-based materials, and particularly relates to a preparation method of a high-performance 1060-O-state aluminum alloy connecting piece. The preparation method comprises the following steps that firstly, a hot-rolled coil is prepared; step 2, preheating treatment; thirdly, a cold-rolled coil is prepared; fourthly, air cushion type continuous annealing is conducted; 5, annealing a finished product in the box-type furnace; and step 6, slitting a finished product. According to the method, the problems of low production efficiency, poor comprehensive performance and high energy consumption when the O-state aluminum alloy connecting piece is prepared by adopting a single box-type furnace annealing process are solved, high-efficiency, high-consistency and low-energy-consumption production is realized, and the prepared connecting piece has stable low strength and high ductility and is suitable for large-scale production. And the application requirements of new energy automobiles and energy storage battery modules can be met.

The embodiment of the invention relates to a compressed air energy storage chamber construction method which comprises the steps that a basic chamber is obtained, an air cushion is placed at an inlet of the chamber, the air cushion is of a double-layer structure, an air injection space is formed between the inner layer and the outer layer of the air cushion, and an air storage space is formed in the inner layer of the air cushion; injecting air into the air injection space to enable the air cushion to reach a preset size; and concrete is injected into an annular space between the foundation chamber and the air cushion. Through the arrangement, the compressed air in the air storage space is subjected to heat insulation and heat preservation by the air in the air injection space, the influence of the temperature change of the compressed air on surrounding rock in the compression stage and the release stage of the compressed air is reduced, the damage to the surrounding rock is reduced, and the energy storage efficiency of the compressed air energy storage chamber is guaranteed. The concrete serves as a supporting structure of the compressed air energy storage chamber, stability is improved, steel linings do not need to be erected, the construction process is simple, construction efficiency is improved, manufacturing cost is low, and construction cost is reduced.

A breathable cushion in accordance with the present disclosure includes a frame arranged inside a cover. The frame includes an outer rim, an inner rim spaced apart from the outer rim, and a lattice extending between the outer rim and the inner rim and defining an internal void of the frame. Apertures are formed through the lattice of the frame. The apertures and internal void allow airflow through the frame.

A motion simulator system is disclosed that includes a freely rotatable movable frame supported by, but unattached to, a hemispherical base. The movable frame comprises a spherical enclosure constructed from rigid, lightweight materials such as composite materials or interlocking panels, providing unlimited 360-degree rotation in all three rotational degrees of freedom (pitch, roll, and yaw). An internal actuator system coupled to the movable frame controls attitude positioning while the center of rotation remains substantially fixed relative to the base. Low friction engagement between the movable frame and base is achieved through transfer bearings integrated into the base's outer surface or by pressure-vented air cushions. The system enables smooth, continuous rotation of the untethered movable frame for enhanced motion simulation applications.

The invention belongs to the field of life, and particularly relates to a thermos bottle with visible water storage capacity. The thermos bottle comprises a shell and an inner container arranged inside the shell. A base capable of vertically moving is mounted at the bottom of the shell, an elastic airbag is fixedly connected between the upper end of the base and the lower end of the inner container, a vertical strip opening is hermetically connected onto the side wall of the shell, a transparent tube is fixedly connected into the strip opening, the lower end of the transparent tube is communicated with the elastic airbag, and a piston block is hermetically connected into the transparent tube. The quantity of water in the thermos bottle can be known by observing the position of a piston block, a piezoelectric ceramic is used for power generation when water is injected, an LED (light-emitting diode) lamp in the piston block can emit light, the quantity of the water in the thermos bottlecan be known conveniently by people, and scalding is avoided. In addition, by the aid of an annular air cushion, when the thermos bottle falls, a good buffering function can be achieved, and impact onthe inner container is reduced.

The present invention discloses an adjustable stern wave suppression plate structure, which relates to the technical field of wave suppression plates; it includes wave suppression mounting parts, and there are two wave suppression mounting parts, and the structures on the two wave suppression mounting parts are the same; a one-way moving part is installed on the wave suppression mounting part, and the one-way moving part is used for one-way movement; a cleaning and fitting part is installed on the wave suppression mounting part; the cleaning and fitting part is used for fitting the one-way moving part; a balance control part can be used to detect the balance state of two extrusion air cushions. By detecting the air pressure, the skew attitude of the ship can be reflected. When one side of the ship is skewed downward, the pressing plate on the other side can be directly controlled to turn up. By turning up the pressing plate on the other side, under the action of water flow, the ship can be pressed downward; to solve the problems that the current stern wave suppression plate structure is not convenient for automatically adjusting the ship attitude and not convenient for automatically keeping the wave suppression plate clean during berthing or navigation.

The application belongs to the technical field of functional coating materials, and particularly relates to a kind of super-hydrophobic solution based on fumed silica and its preparation method and application, comprising: step one, 20-200nm fumed silica nanoparticles are dispersed in ethanol / water mixed system, and sodium dodecyl benzene sulfonate is added to prevent agglomeration;Step two, under the catalysis of ammonia, tetraethyl orthosilicate and 1H, 1H, 2H, 2H-perfluorodecyltriethoxysilane are added dropwise in sequence for fluorination modification;Step three, fluorinated silica nanoparticle suspension is prepared by ultrasonic-assisted reaction;Step four, the solution is sprayed onto the surface of ceramic substrate with micro-nano structure to form a coating;Step five, strong adhesion without adhesive is realized by mechanical anchoring effect.The application realizes super-hydrophobic performance of 153±0.5° high water contact angle and physical adhesion stability under 100-200g load by the synergistic effect of nanoparticle size effect and substrate surface topological structure, low surface energy of fluorinated alkyl chain and Cassie-Baxter air cushion layer effect, and is especially suitable for self-cleaning surface, anti-icing coating and marine corrosion prevention field.

The utility model discloses an air floatation gravity removing device which comprises a simulation wall, an air floatation platform and an air floatation system, and the simulation wall is used for installing a test piece to be unfolded. The air floatation system comprises a control cabinet, an air pipe assembly and a plurality of air cushion assemblies; the plurality of air cushion assemblies are used for respectively mounting each unfolding page in the test piece to be unfolded. The air cushion assembly is placed on the air floating platform. The air cushion assembly comprises a plurality of air feet, two air foot supports, two supporting parts and an adapter support. The first ends of the two air foot supports are connected with each other, and the connecting positions of the second ends of the two air foot supports and the first ends of the two air foot supports are of a triangular structure and envelop the gravity center range of the corresponding unfolding page. The air foot is arranged at the bottom of the air foot support, and the control cabinet is used for providing compressed air for the air foot so that an air film can be produced at the bottom of the air foot to suspend on the air floating platform. The bottoms of the two supporting parts are connected with the two air foot supports respectively, the tops of the two supporting parts are both connected with the switching support, and the switching support is provided with a switching part used for installing the unfolding hinge.

The present invention discloses a slurry shield excavation device and method suitable for super gravity simulation. The shield body and the slag feeding and discharging system are fixed by a bottom plate and placed on a geotechnical centrifuge. The soil box and the shield power system are connected by the shield body, and the shield body is connected to the slag feeding and discharging system. The front partition divides the working cabin into a slurry cabin and an air cushion cabin. One end of the main shaft passes through the slurry cabin and the air cushion cabin in sequence and is connected to the cutter head, and the other end is connected to the driving motor; one end in the cabin shell is movably connected to the opening of the soil box, and the other end is fixedly connected to the power box. The slag feeding and discharging system is used to transport mud in the working cabin and discharge mud. A pressure maintaining system is provided inside the cabin shell, and the pressure maintaining system is used to control the gas pressure in the air cushion cabin. The present invention can restore the stress level of the actual soil and simulate the excavation process of the actual slurry shield. Through the excavation parameters, mud pressure and soil response law during the excavation process, a theoretical basis is provided for the construction of deep buried and cross-sea tunnels.

The invention discloses an unmanned ship self-adaptive safety redundancy system for an inland river ultra-shallow water environment and a control method. The system is composed of four-stage closed-loop redundancy of sensing, decision making, execution and laws and regulations. A 0.1 m-stage shallow water three-dimensional map is constructed in real time by a dual-millimeter-wave radar and a high-frequency single-beam sounding sonar; the main and standby controllers process the quay wall effect, backflow and grounding nonlinear disturbance on line through a BLF-RBFNN fixed time convergence algorithm, and the upper bound of convergence time is 4.2 s and is irrelevant to the initial state; the variable-configuration double-pump jet-air cushion hybrid propulsion device adjusts the draft on line according to the water depth of 0.12-0.45 m, and is matched with the self-righting honeycomb composite ship body to automatically stop leakage and return within 60 seconds when the ship body is damaged; and when the ship-end double control fails, the ship-shore cloud collaborative digital twinborn body completes regulation-level minimum risk takeover within 10 seconds. Experiments prove that the path error is less than or equal to 0.08 m and the fault degradation success rate is 100% in a 0.15 m water tank and 0.35 m Yangtze River channel, and zero-grounding, zero-overturning and zero-regulation illegal sailing of the ultra-shallow water unmanned ship is realized.

The utility model discloses an automatic sponge placing device for an air cushion liquid foundation box, which comprises a rack, a lifting mechanism, a material pressing mechanism, a feeding mechanism, a sponge stock bin and a material loading jig, the lifting mechanism is mounted on the rack, the material pressing mechanism is mounted on the lifting mechanism, the feeding mechanism is arranged on one side of the material pressing mechanism, and the material loading jig is arranged on the other side of the material pressing mechanism. A sponge stock bin is arranged on one side of the material pressing mechanism, and a material carrying jig is arranged below the material pressing mechanism; the feeding cylinder drives the feeding plate loaded with the sponge to move to the supporting plate, then the lifting cylinder drives the feeding plate and the supporting plate to move to the position above the air cushion liquid foundation box, and finally the pressing cylinder drives the pressing block to move downwards to press the sponge into the air cushion liquid foundation box. Therefore, the sponge can be automatically fed into the air cushion liquid foundation box, the industrial mass production is realized, the production efficiency is improved, the labor intensity is reduced, and the production cost of the product is further reduced.

The utility model relates to the technical field of fire rescue, and discloses a fire-fighting air cushion fixing seat which comprises an adjusting mechanism, a placing mechanism and a moving mechanism, the placing mechanism is located on the inner side of the adjusting mechanism, and the moving mechanism is located at the bottom of the adjusting mechanism; the adjusting mechanism comprises an adjusting handle, a bolt is fixedly connected to the back face of the adjusting handle, a bearing is slidably connected to the surface of the bolt, a fixing block is fixedly connected to the bottom of the bearing, a base is slidably connected to the bottom of the fixing block, and a sliding shaft is fixedly connected to the inner surface of the fixing block. By arranging the adjusting handle, the bolt on the back is driven to rotate by rotating the adjusting handle, meanwhile, the fixed block slides on the inner surface of the base, and the sliding shaft slides on the inner surface of the hollow sliding shaft, so that the sliding frame fixed on one side of the fixed block is driven to move; at the moment, the sliding frame and the supporting plate slide on the inner surfaces of the second hollow sliding plate and the first hollow sliding plate respectively.

Disclosed is a recoil pad assembly for the stock of a rifle (200), which is used in all kinds of rifles, including rifles or smoothbore rifles, air rifles and firearms rifles and non-firearms rifles, which are fired by resting the rifle on the shoulder. The assembly includes a recoil pad which can be attached to and detached from the rear end of the stock and allows the stock to be set on the shoulder; and a silicone air cushion attached to and detached from the stock together with the recoil pad on the front side joining the recoil pad with the stock, which contains air and reduces the load on the user's shoulder by reducing the impact during firing and prevents the rifle from muzzle climb.

The utility model relates to the field of bedding, in particular to a massage air bag, an air cushion and a massage air bag pillow. An existing massage air bag is formed by butt joint of an upper concave cavity and a lower concave cavity, sponge is arranged in the lower concave cavity, the structure is complex, and production cost is high. Therefore, according to the massage air bag, the air cushion and the massage air bag pillow, the massage air bag comprises a bag body internally provided with a bag cavity, the bag body is formed by attaching the peripheries of an upper placing piece and a lower placing piece which are vertically stacked, the bag cavity is defined by the upper placing piece and the lower placing piece, a massage part is arranged in the middle of the upper placing piece, and the top wall, where the massage part is located, of the bag body protrudes upwards during inflation; the upper placing piece protrudes out of the lower placing piece extending in the plane, the side wall and the top wall of the bag body are formed by the upper placing piece, and a concave cavity is formed in the side, facing the lower placing piece, of the upper placing piece to serve as a bag cavity. The capsule cavity only exists in a single cavity on one side of the upper placing piece, the lower placing piece is not provided with a cavity, the capsule structure is simplified, and the production cost is reduced. The air cushion using the massage air bag and the massage air bag pillow using the air cushion are also simplified, and the cost is reduced.

The invention discloses an ultra-large-diameter slurry shield deslagging parameter optimization method, system and device and a storage medium. The method comprises the following steps that a three-dimensional model is constructed; establishing a motion simulation model; the motion simulation model solves a flow process equation of a slurry fluid phase and a motion control equation of a rock slag particle phase according to the deslagging parameters, so that flow field distribution characteristics and rock slag migration behaviors in the excavation bin and the air cushion bin are obtained; obtaining an evaluation index of the deslagging performance, and judging whether the evaluation index meets a preset requirement or not. According to the method, a fluid phase flow equation and a particle phase motion control equation are solved by utilizing the simulation model, and an interaction mechanism of the slurry and the rock slag is defined, so that simulation is closer to a real situation; and dynamic adaptation of slag discharge parameters with a complex pipe network system and actual construction working conditions is realized. The probability of detention and accumulation of rock slag at the bottoms of the excavation bin and the air cushion bin is remarkably reduced, equipment abrasion is reduced, abnormal tunneling parameters are avoided, and stability and continuity of shield tunneling are guaranteed.

The invention discloses an air cushion bed system. The air cushion bed system comprises an inflatable air cushion bed, an air conveying pipeline and a CPR valve device. The CPR valve device is configured in the mode that when the inflatable air cushion bed is in the use state that a patient lies on the inflatable air cushion bed, the top of the CPR valve device is not lower than the lying face adjacent to the CPR valve device. Good and remarkable operation guidance is provided for the deflation operation of the air cushion bed, the CPR valve device can be quickly found and operated, and the time required by the preposed procedure of deflation of the inflatable air cushion bed is effectively shortened, so that a patient can receive first aid more quickly, the success rate of CPR is increased, and the quality and effect of emergency medical care are improved.

The disclosed technology includes an air valve assembly for providing flexibility for a user when inflating an inflatable air mattress. The air valve assembly can include a base configured to attach to a portion of the inflatable air mattress, a middle valve configured to attach to the base portion and having a first diameter, a diaphragm member configured to attach to the middle valve, and a cap configured to removably couple to a portion of the air valve. The assembly can further include an adapter configured to detachably attach to the middle valve portion. The adapter can have a portion with a second diameter that is smaller than the first diameter such that when the adapter is attached, a user may use an inflation device with a smaller dimensioned output.