51results about How to "Reduce the amount of inflation" patented technology

The invention relates to a detection method of work pieces such as semiconductor photoconducting devices and the like with air tightness requirements, in particular to a low gas consumption detection method of a pressure helium leakage detector. The method sequentially comprises the following steps: a. placing a solid pad block with the certain size at the bottom of a pressure container of the pressure helium leakage detector before detection; b. placing devices to be detected into the pressure container to pump the vacuum to minus 0.1 MPa pressure; c. opening a valve of a helium gas steel cylinder to inflate dry helium gas into the pressure container until the pressure value meeting the process requirements of the devices to be detected is reached; d. releasing the pressure after 2 hours of pressure maintaining on the pressure container; and e. taking out the devices to be detected for being blown for 2 minutes in nitrogen gas and then putting the devices to be detected into a helium gas mass spectrograph for leakage rate test. The method of the invention is used for the air tightness detection on the devices with small sizes, because the space in the pressure container during the detection is reduced, the inflation quantity of the helium gas can be reduced, and the detection cost is saved. At the same time, the time required by vacuum pumping and helium gas inflation in the detection process is also greatly shortened, so the detection efficiency is improved.

The invention provides a pneumatic joint-type rehabilitation manipulator. A pneumatic joint (2) is of a retractable pleated airbag structure; a wrist air inflation and deflation part (11) is communicated with the airbag structure of the pneumatic joint (2); a finger part (13) is matched with a connection structure of the hand bone, and a plurality of knuckle parts (131) on the finger part (13) aresequentially and rotatably connected and rotatably connected to a palm part (12) separately; the knuckle parts (131) are driven to rotate through the extension and retraction of the pneumatic joint (2) and provided with a wearing structure (3) for fixing the human hand. The pneumatic joint-type rehabilitation manipulator is suitable for training of patients with hand diseases in various occasionsespecially at home, helps the patients with the hand diseases to carry out correction rehabilitation training and is suitable for not only rehabilitation persons who cannot conduct active training with the hands and but also users who can carry out active training to a certain degree. The manipulator is simple in structure, convenient to manufacture and carry, easy to operate, economical and practical and has good market prospects.

The invention relates to the sealing detection apparatus and discloses an apparatus capable of carrying out on-line detection on glove integrity in an isolator system. The apparatus comprises a hollow sealing cover and a hollow square sealing ring. The sealing cover is formed through superposing a first sealing cover plate and a second sealing cover plate. The first sealing cover plate and the second sealing cover plate are fixedly connected. The sealing ring is sleeved on a periphery of a sidewall of the sealing cover. The first sealing cover plate is provided with a hollow L-shape handle. A short arm of the L-shape handle is fixedly connected with the first sealing cover plate. An oversleeve gas filling tube, a sleeve pressure detection tube and a cover plate gas filling tube are also comprised. The oversleeve gas filling tube and the sleeve pressure detection tube successively pass through the L-shape handle and the first sealing cover plate and then are connected with an oversleeve gas filling port and a sleeve pressure detection port respectively. The oversleeve gas filling port and the sleeve pressure detection port are through holes arranged on the second sealing cover plate. The cover plate gas filling tube passes through the L-shape handle and the first sealing cover plate and then is connected with the square sealing ring. The apparatus of the invention has the advantages that usage is convenient; the on-line detection can be performed.

The invention provides a human hand-imitated type rehabilitation manipulator. Pneumatic joints (2) are of pleated airbag structures; a wrist air filling and releasing part (11) is communicated with the airbag structures of the pneumatic joints (2); finger parts (13) are matched with connection structures of hand bones, a plurality of knuckles (131) on the finger parts (13) are hinged through hinges (4) and driven by the pneumatic joints (2), the finger parts (13) are respectively connected with a palm part (12) through the pneumatic joints (2), and a wearing structure (3) for fixing a human hand is arranged. The manipulator is suitable for patients with hand diseases to perform training in various occasions, especially at home, and the manipulator can help the patients with hand diseases to perform corrective rehabilitation training and is suitable for rehabilitation persons whose hands cannot be actively trained as well as users who can conduct a certain degree of active training. Themanipulator has a simple overall structure, convenient manufacture, convenient carrying, easy operation and good market prospect and is economical and practical.

The invention discloses an automatically opened and closed flat-bottom valve gate which is arranged on a stilling pool and a horizontal alley. The automatically opened and closed flat-bottom valve gate is characterized by comprising a tapered door body valve gate, an arched bracket, water seals of notches around the arched bracket, support shafts and upper and lower movable switches of the support shafts, wherein the tapered door body is hollow; the cavity of the tapered door body contains a compressed airbag which has a big upside and a small downside; multiple water inlets are formed in the upper side of the tapered valve gate while a water outlet hole is formed in the downside. The shafts are arranged at both the upper part and the lower part of the valve gate and are connected to the arched bracket; a gas conveying pipe and a gas valve pipe both for inflating and deflating the airbag are arranged at two sides of the arched bracket. The valve gate is internally provided with a gas heating device for heating and warming the gas. The gas valve can seal the water automatically when being closed and can send a signal when discharging water successfully. The automatically opened and closed flat-bottom valve gate has the advantages of being simple in structure, safe, labor-saving, opened and closed automatically, and the like.

The invention discloses an internal combustion engine nitrogen-reducing and oxygen-increasing air inlet device and a control method thereof. The internal combustion engine nitrogen-reducing and oxygen-increasing air inlet device comprises nitrogen filter pipes, a control system and an exhaust gas turbine connected with an exhaust pipe, wherein the wall pipe of the nitrogen filter pipes is provided with a first oxygen sensor, a low oxygen air exhaust valve and an air straight-through valve electromagnetic valve; one end of a turbine air pressing device is connected with an air filter; an air inlet manifold is connected with a plurality of air inlet manifolds of an engine; the air inlet manifold is provided with a second oxygen sensor. The air filter is used for filtering mechanical impurities in air, the turbine air pressing device is used for pressing each nitrogen filter pipe, oxygen in air is successfully filtered through the nitrogen filter pipes to enter an air cylinder under the combined action of the pressing of the turbine air pressing device and the air inlet suction of an engine, but the nitrogen is inhibited to pass through, so that the content of the oxygen in air entering the air cylinder through the nitrogen filter pipes is greatly increased, and then higher power can be achieved through oil burning, the burning is improved at the same, and the energy saving and environmental protection of the engine are really achieved.

The invention relates to a shared express box with inflation-type cushioning strips. A smart lock is arranged between a box body and a box cover. The smart lock includes a lock tongue drive mechanism,a wireless communication module, a controller and a power supply module. A main display screen and a subsidiary display screen are arranged on the box cover. A partition plate is arranged between themain display screen and the subsidiary display screen. Sliding rods are arranged on two sides of the main display screen. A slidable keyboard is arranged on the sliding rods. An electromagnetic lockis arranged between an upper end of the keyboard and the partition plate. Four curved inflation strips are arranged in the box body. Two ends of each inflation strip are respectively fixed at two opposite corners of a side wall. An annular partition pipeline is arranged in side walls of the box body in an embedding manner. The annular inflation pipeline has an inflation valve arranged in a mannerof extending from a side wall of the box body and four inflation pipes respectively connected with inflation ports of the four inflation strips. The express box of the invention can be recycled, the built-in curved inflation strips thereof can be deformed according to a shape of a transported article, and effective protection of the transported article can be realized with requiring only a very small amount of inflation.

The invention discloses a simulation testing device and method for bituminous pavement pore water pressure. The device comprises a bituminous concrete sample, an open container and a pressure container, wherein the bituminous concrete sample and the open container are located in the pressure container, the portion between the bottom of the bituminous concrete sample and the opening annular portion of the open container is filled with a bonding agent, the side wall of the bituminous concrete sample is coated with the bonding agent, a first pressure sensor used for measuring outer water pressure of the bituminous concrete sample and a second pressure sensor used for measuring bottom water pressure of the bituminous concrete sample are arranged on the side wall of the open container. The method includes the steps that after the prepared bituminous concrete sample and the open container are placed in the pressure container, the pressure sensors, a piston and a seal pressure container are installed, a control flow path is selected to start testing, and data of the pressure sensors is collected. Directional movement of pore water is achieved through the device, and the response regularity of dynamically-changed bituminous concrete pore water pressure under the external water pressure action can be tested.

The invention discloses a device and a method for simulating a test of pore water pressure of an asphalt pavement. The device comprises at least two pressure containers, wherein a binder is filled between the bottom part of an asphalt concrete specimen in each pressure container and an opening annular part of an opening container; the side wall of each specimen is coated with a sealing part; a first pressure sensor is arranged at the side wall of each pressure container and is used for testing the external water pressure of the corresponding specimen; a second pressure sensor is arranged at the side wall of each opening container and is used for testing the bottom water pressure of the corresponding specimen; the opening containers are communicated by a pipeline which penetrates through the side walls of the pressure containers. The method has the advantages that by adopting a control process meeting different wheel load functions and characteristics, the specimens in the pressure containers are successively and respectively loaded, the internal and external water pressures of each specimen are effectively sealed and isolated, and the external water pressure and pore water pressure during loading are monitored in real time. The device has the advantages that the directional flowing of pore water is realized, and a dynamic response rule of the pore water pressure of asphalt concrete under the action of dynamically-changed external water pressure can be tested.

The invention relates to the technical field of water blockage equipment, and discloses a water injection type water blockage air bag and an application method thereof. The application method of the water injection type water blockage air bag specifically comprises the following steps that firstly, a three-phase power source is connected, an air compressor is adjusted, an air pressure meter of theair compressor is checked to the normal air pressure, a water pressure vehicle and an air pump get ready, the seal performance of an air nozzle and a pipe connector is checked, and a medical oxygen meter air entrapping pipe and the air compressor are connected to serve as an emergency air source; and secondly, a diver enters a water conveying pipeline for underwater groping, and whether impurityburrs exist in the water conveying pipeline or not is checked. Water is injected into an air bag body, the weight of the air bag body and the water pressure to the side wall of the air bag body from water are increased, friction force between the air bag body and the inner wall of the water conveying pipeline is increased, accordingly, the capability of bearing the water pressure under the actionof a high water head is improved, water injection is equivalent to reduction of internal space of the air bag body, accordingly, the inflation amount is reduced, the effect of lowering the gravity center of the air bag body is achieved, and stability of the air bag body is improved.

The invention discloses a foldable wire-drawing inflatable sofa, which comprises a backrest, armrests and a seat. The backrest and the armrests at two sides are integrated. The backrest and the armrests at two sides form a square structure such that the backrest and the armrests at two sides can be folded into a square structure. Two ends of the seat are provided with seat bulges, which are inserted into seat holes arranged in the armrests at two sides. Magic tapes are fixed on the seat bulges, and fit with magic tapes fixed on the armrests. Therefore, the seat and the armrests are fixed. The backrest and the seat are both provided with air vents for air inflation and deflation, and the backrest, the armrests and the seat are all made of a wire-drawing material. The invention has the following beneficial effect: by the use of the wire-drawing material, the raw material is shaped by wire-drawing after air inflation, and then the problem that an airtight product expands in each direction is solved; after air inflation, both faces are flat and smooth so as to achieve the plate-type effect; the air inflation amount is smaller than air inflation amount of a common sofa; and the sofa of the invention occupies small space and is convenient to carry.

The invention relates to a self-energy dual-acting arc extinguishing chamber, and belongs to the technical field of a high-voltage switch. The automatic arc extinguishing chamber comprises a movable end part and a static end part, wherein the movable end part comprises a movable end pull rod, an air cylinder, an expansion chamber and an auxiliary nozzle, the static end part comprises a static arccontact, an arc extinguishing nozzle and a connection rod structure, the auxiliary nozzle is fixedly connected with the arc extinguishing nozzle, the static arc contact can be driven to achieve equal-speed deviation motion during the motion process of the movable end pull rod, the static arc contact is provided with a piston, an outer wall of the piston is matched with an inner wall profile of thearc extinguishing nozzle, a gap is formed between the outer wall of the piston and the inner wall profile, an air guide passage is formed in the static arc contact and communicates with a surface ofthe piston from an axis, high-voltage gas generated by an arc flows into an enclosed region formed between the piston and the arc extinguishing nozzle through the air guide passage, and the capacity of the expansion chamber is equivalently expanded. The self-energy dual-acting arc extinguishing chamber is provided with the air cylinder, the expansion chamber and an auxiliary piston, a three-air chamber structure is formed during the breaking process, the arc extinguishing speed is rapid, and an effect is good.

The invention discloses a assembled energy-saving wooden door, comprising a door panel, an airbag device and an inflation device, wherein the door panel is provided with a door lock, and the door lockis provided with a rotatable handle; the airbag device is arranged at the lower part of the door panel, and may seal the gap between the lower part of the door panel and the ground when the door panel is in the closed state; the inflation device is matched with the airbag device for inflating the airbag device; the inflation device comprises an operating chamber arranged in the door panel, a movable rod which can move up and down and are arranged in the operating chamber, a plurality of pressing columns spaced on the movable rod, a piston part arranged in the lower part of the pressing columnand a sealing ring arranged on the piston part; the lower part of the door panel is provided with a cover plate cavity communicated with the operating cavity and a detachable cover plate arranged inthe cover plate cavity; the height of the cover plate cavity is greater than the height of the operating cavity. For the invention, when the parts in the operating chamber need to be maintained, the cover plate may be removed from the cover plate cavity, which is convenient for disassembly, assembly and replacement and reduces the man-hour of maintenance.

The invention provides a closed door device suitable for mine tunnels. The device comprises a door main body, an airbag, telescopic rods and a support cushion. The innermost side of the airbag is connected to the frame of the door main body, the telescopic rods are arranged around the door main body, one ends of the telescopic rods are fixedly connected to the frame of the main body, the other ends are connected with the support cushion, and the support cushion is connected to the outermost airbag skin of the airbag into a whole in a bonding mode. According to the device, the door main body inthe middle of a door body is of a hard structure, the edge is an inflatable airbag, so that the door body has certain strength and stability, and good sealing performance; according to the device, oxygen loss can be reduced and the utilization rate of oxygen can be improved without affecting underground ventilation; as the tunnels advance, the position of the closed door can be gradually adjustedto adapt to changes of the environment, so that a closed space is always maintained at an appropriate size, the oxygen concentration in a local space can be maintained, constant oxygen supply effectis ensured, a large amount of underground space resources, material resources and financial resources can be effectively saved, the maintenance is convenient, and the cost is low.

The invention discloses a disassemble cuff type sphygmomanometer, which comprises a sphygmomanometer and a cuff, wherein the sphygmomanometer is connected with an upper fixing element, or the sphygmomanometer and the upper fixing element form an integral element; the cuff is connected with a lower fixing element; the upper fixing element and the lower fixing element are detachably connected through a fixed connection element; the upper fixing element is a thin-wall element; the lower fixing element is a batten column composite element or the integral element; the fixed connection element is aplate rod hook composite element or the integral element; disassemble connection is detachable hooking; the cuff is a disposable cuff; and the sphygmomanometer is provided with a contact-proof cover.The sphygmomanometer and the cuff of the disassemble cuff type sphygmomanometer can be easily disassembled, and when blood pressure monitoring equipment needs to be disassembled for multiple times, the sphygmomanometer in the disassemble cuff type sphygmomanometer can be easily disassembled from the cuff and can be easily assembled to the other cuff. The disassemble cuff type sphygmomanometer is favorable for lowering the production cost of the disposable cuff, and the problem that when a patient uses the disassemble cuff type sphygmomanometer, the patient touches buttons on the sphygmomanometer by mistake can be avoided.

The invention relates to the technical field of welding, and discloses a flux-cored wire for surfacing repair. The flux-cored wire comprises a flux-cored wire main body, wherein the flux-cored wire main body comprises a metal layer wrapping a flux core; the flux core comprises the following components in percentage by weight: 0.1 to 5 percent of C, 0.8 to 3 percent of Mn, 0.5 to 2 percent of Si, 3 to 25 percent of Cr, 1 to 4 percent of Mo, 1 to 10 percent of W and the balance of Fe. According to the flux-cored wire, Mo is added into a conventional flux core formula, so that the performance of high temperature resistance and abrasion resistance of a welding material is achieved, the strength of a welding seam is ensured, and a welding layer is favorably prevented from being stripped in large scale; by Mo in steel, the hardenability and the thermal strength can be improved, the temper brittleness is prevented, and the residual magnetism and the coercive force are improved; silicon does not form carbide, so that a powerful function of promoting the graphitization of carbon is realized.

The invention provides a doctor pulse condition process recorder, and belongs to the technical field of medical equipment. The doctor pulse condition process recorder comprises a fixing platform, a pulse condition housing, a pulse condition window, a pressure sensing membrane and a pulse condition recording module, wherein the pulse condition housing is provided with a cavity for accommodating anarm, and is rotatably connected with the fixing platform through a rotating shaft; the pulse condition window is formed in the top end of the pulse condition housing and penetrates through the top endof the pulse condition housing; a pressure sensor is arranged in the pressure sensing membrane; the pressure sensing membrane is arranged on the pulse condition window in a covering manner; and the pressure sensor is used for at least receiving a pressure signal from the outer part of the pulse condition window to the inner part; and the pulse condition recording module is electrically connectedwith the pressure sensor in the pressure sensing membrane. According to the doctor pulse condition process recorder disclosed by the invention, through the pressure sensor arranged in the pressure sensing membrane, physical parameters including the pressure and the position of fingers of a doctor, frequency and waves of beating of the pulse of a patient and the like can be objectively recorded; and the data is important support for subsequent doctor pulse feeling process record, disease identification thinking process analysis, diagnosis and treatment process optimization and experience sharing and teaching.

The invention relates to an ultra high voltage SF6 gas-insulated wall feed-through sleeve. The ultra high voltage SF6 gas-insulated wall feed-through sleeve comprises an external insulation structure and an electrode structure arranged inside the external insulation structure, wherein the external insulation structure comprises an outdoor insulation sleeve and an indoor insulation sleeve which are connected by virtue of a flange, the electrode structure comprises a conducting rod, an intermediate electrode and a grounding electrode, the outdoor insulation sleeve and the indoor insulation sleeve are at least provided with two adjacent sub sleeves, the sub sleeves are fixed into a whole by virtue of transition pieces, and the two ends of the intermediate electrode are respectively fixed on an outdoor transition piece and an indoor transition piece. The ultra high voltage SF6 gas-insulated wall feed-through sleeve has the advantages that by virtue of innovation of external insulation and an interior electrode structure, electrical properties and bending strength of the sleeve can be obviously improved; compared with the traditional ultra high voltage wall feed-through sleeve, weight of a product self is greatly reduced, mounting is more convenient, operation is more reliable, and manufacturing difficulty and manufacturing cost of external insulation and the whole sleeve are also reduced.

The invention provides a plastic bag constant-volume inflating device, which comprises a pressure stabilizing inflation device and a plastic bag opening suction opening and heat sealing device. The input end of a inflation control valve is connected with an air inlet pipeline, and the output end of the inflation control valve is connected with a pressure stabilizing device; the output end of the pressure stabilizing device is connected with an electromagnetic valve; the output end of the electromagnetic valve is connected with an inflation device; and the output end of the inflation device isconnected with a plastic bag opening opened through the plastic bag opening suction opening and heat sealing device through a needle tube of a vacuumizing inflation needle tube telescopic device. Theplastic bag opening suction opening and heat sealing device is provided with a plurality of rubber vacuum suction cups through a vacuum generator, the suction cups are sequentially arranged on the upper side and the lower side of the plastic bag opening in a face-to-face mode, and air cylinders are installed on suction cup supports respectively to control the supports to reciprocate. A PLC (Programmable Logic Controller) as well as the pressure stabilizing inflation device and the plastic bag opening sucking opening and heat sealing device which are connected with the PLC are arranged; and thedevice is simple in structure, effectively achieves the purposes of continuously controlling the pressure in the container to be stable, automatically sucking and opening the plastic bag opening, vacuumizing, constant-volume filling and heat sealing, and is safe and reliable in work and high in efficiency.

The invention discloses a timing feed feeding device for aquaculture and a feeding method of the timed feed feeding device , and belongs to the technical field of timed feed feeding, the timed feed feedingdevice comprises a storage barrel, a sealed discharging device is arranged below the storage barrel, a putting device is connected below the sealed discharging device, and the putting device is mounted above a buoyancy device; and a power assembly connected with the throwing device is arranged below the buoyancy device. According to the timed feeding device for aquaculture and the feeding method of the timed feeding device, the sealing performance of the storage barrel in the feeding process is effectively guaranteed, moisture is prevented from entering the storage barrel, internal feed is prevented from being affected with damp, feed deterioration is avoided, the feeding effect is prevented from being affected, the feed storage environment is guaranteed, metering of feed feeding is guaranteed, and the feeding precision is improved; and quantitative scientific feeding is effectively achieved, inconvenience of artificial feeding is reduced, feed scattering uniformity is guaranteed, utilization efficiency is improved, and automatic timed and quantitative feed feeding is effectively achieved.

A combustion volume technique and a control inflation quantity technique can be synchronously executed and controlled so as to gain a most suitable compression pressure which aims at avoiding detonation, optimum operation and fuel adaptation under full working condition by an upper and lower cylinder moving device which is controlled by a servo system, a combination camshaft device, a built-in device, a special electricity removal excitation valve control system, and a compression pressure arrangement and adjustment system which is based on the previous devices. The best working point of an engine is elongated to the line of all power lines of full working conditions, and the engine always keeps the best working state under the full working condition, has more powerful power and saves the energy and protects the environment more. By adopting the technique, the invention gains a method which leads a reciprocating engine to generate an expiration (aspiration) stroke and controls the power thereout. The invention provides the method which leads the engine to keep constant compression pressure under full working condition and restrains and avoids the occurrence of detonation and deflagration by reducing the compression pressure.

The invention discloses an adjustable air cylinder damping system. The adjustable air cylinder damping system comprises an air storage tank, a pressure regulating switch and an air cylinder, the air cylinder is arranged on a vibrated part of a motorcycle, a piston rod of the air cylinder is connected to a bearing part of the motorcycle; an air outlet of the air storage tank communicates with the air cylinder through a first air pipe, an air inlet of the air storage tank is connected with an air pump through a second air pipe, the air pump is arranged on a motorcycle body; and a first sensor which is used for detecting the bearing weight is arranged on the air cylinder, the first sensor is electrically connected with the pressure regulating switch, and the pressure regulating switch is arranged on the first air pipe. According to the adjustable air cylinder damping system, adjusting the pressure of the air cylinder is carried out according to the weight of a vehicle and the weight of carried goods and passengers and the like, so that a good damping effect is achieved, and the riding comfort of the passengers is improved.

The invention discloses a safety air bag installed on the rear side of an automobile seat, and belongs to the field of vehicle engineering, the safety air bag comprises an air bag release device installed on a backrest of the automobile seat, and further comprises a sliding support, a transmission mechanism and a driving mechanism, the sliding support is slidably connected with a track of the automobile seat, and the top of the sliding support is connected with the air bag release device; the driving mechanism comprises a rack arranged in the track in the same direction and a support gear installed at the lower end of the sliding support, the support gear is meshed with the rack, an air bag releasing device is installed at the upper end of the sliding support, the transmission mechanism is installed on a side support assembly of the sliding support, and the support gear drives the adjusting mechanism through the transmission mechanism. The adjusting mechanism is used for adjusting the adjustable valve to change the inflation volume proportion of the forward air bag and the lateral air bag. The ratio of the air output of the forward air bag to the air output of the lateral air bag can be changed no matter the seat backrest rotates or the seat body slides front and back, and passengers in the rear row are protected from being hurt by impact force generated when the air bags are opened.

The invention belongs to the technical field of external counterpulsation, and particularly relates to a shock wave pneumatic mixing type external counterpulsation device which comprises a binding belt, an air bag, a shock wave generator and an air supply assembly. The air bag is fixed on the binding belt; the shock wave generator is fixed to a band body of the binding band, and when the binding band binds the limbs of a user, a shock head of the shock wave generator abuts against the limbs of the user. The air supply assembly is provided with at least two branch pipes, one branch pipe is communicated to the shock wave generator through an electromagnetic valve, and the other branch pipes are communicated to the air bag. The shock wave generator and the air bag are combined for use, a hemodynamic effect can be generated, rupture of local micro capillaries can be accelerated, exposure of blood and cell media is promoted, neovascularization is stimulated, the dissolving speed of solid substances can be increased, local blood circulation is promoted, tissue metabolism is accelerated, and healing of damaged tissues is promoted.

The invention relates to a method for testing the air tightness of battery boxes. The method has the advantages that preliminarily prepared fillers with the sizes similar to the sizes of battery modules are arranged inside battery box bodies according to the sizes and the quantities of the battery modules before the air tightness of the battery box bodies is tested, then the air tightness of the battery box bodies is tested, accordingly, empty boxes do not need to be tested, the inflating volume of compressed air inside the battery boxes can be reduced to a great extent, and temperature and humidity difference of air inside and outside the box bodies can be lowered; actual use conditions of the battery boxes are simulated, and accordingly the accuracy of test results can be improved.

The invention relates to the technical field of air pressure, in particular to a plastic bag constant-volume air inflation method. According to the plastic bag constant-volume air inflation method, gas outputs stable pressure through a pressure reducing and stabilizing valve, the stable pressure is transmitted to a pressure tank, and when a pressure sensor detects that the pressure in the pressuretank is about to reach the set pressure, the pressure reducing and stabilizing valve is controlled by a PLC to reduce the flow speed and reduce the air inflation amount; and on the contrary, the pressure reducing and stabilizing valve is controlled to increase the flow speed to increase the air inflation amount, so that the pressure in the pressure tank tends to be in a constant-pressure state, and a stable constant-pressure source is provided for equipment to be inflated. The PLC is connected with an air inflation control valve of a pressure stabilizing air inflation device, the pressure reducing and stabilizing valve, the pressure sensor, an electromagnetic valve, a flow switch, an air cylinder of a vacuumizing inflation needle tube telescopic device, an air cylinder of a plastic bag opening suction opening and heat sealing device, a vacuum generator and a heat sealing device through signal lines, so that full-automatic suction opening of a plastic bag opening, vacuumizing constant-volume air inflation and heat sealing are effectively integrated. According to the plastic bag constant-volume air inflation method, the structure is simple, and automatic and constant-volume fillingof gas can be achieved.

The invention provides a seal testing device and system for a rotary disc bearing. The seal testing device comprises an outer ring sealing cap used for being connected with the end surface of one side, backing on the sealing ring, of the outer ring of the bearing in a sealing mode, and further comprises an inner ring sealing cap used for being connected with the end surface of an inner ring of thebearing in a sealing mode; after the outer ring sealing cap and the inner ring sealing cap are connected with the bearing, and a sealing inner cavity is enclosed by the outer ring sealing cap and theinner ring sealing cap and the bearing; a gas charging connector used for being connected with a high-pressure gas source and charging compressed gas into the sealing inner cavity is arranged on oneof the outer ring sealing cap and the inner ring sealing cap, a pressure detecting device used for communicating with the sealing inner cavity is further arranged on one of the outer ring sealing capand the inner ring sealing cap, and the pressure detecting device judges the sealing property of the bearing by detecting whether the pressure in the sealing inner cavity changes or not. According tothe sealing testing device and system for the rotary disc bearing, the rotary disc bearing does not need to be subjected to installation detection, and the problem that the seal testing efficiency islow due to installation and dismantling is solved.