56results about How to "Play a secondary role in protection" patented technology

The invention provides an airtight heat preservation steel plate silo and a manufacturing method thereof. The steel plate silo is low in manufacturing cost, occupies small floor area and is easy for mechanical production; however, due to the poor airtightness, fumigating and inset killing cannot be carried out, thus, the steel plate silo is not suitable for being storinged for a long time. The airtight heat preservation steel plate silo comprises an internal cylinder body; the internal cylinder body comprises a silo cylinder (1) and a silo top (2); the silo top is connected with the silo cylinder through welding; and the connecting structure is continuously welded; a heat preservation layer (3) is arranged outside the internal cylinder body; the internal cylinder body is connected with an upright column (4); an external cylinder body (5) is arranged outside the heat preservation layer; and the silo top is an integrally welded structure. The airtight heat preservation steel plate silo provided by the invention can be used as a steel plate grain bin for storing grains for a long time.

The invention discloses a method and a device for improving the corrosion resistance of stainless steel weld seams. The method comprises the following steps of: firstly, preparing a kind of nanoscale metal corrosion inhibitor particles; then, injecting the nanoscale metal corrosion inhibitor particles into stainless steel weld seams by using a carbon dioxide laser so as to form an anti-corrosion layer; and finally, carrying out shock strengthening treatment on the surfaces of the stainless steel weld seams by using a nanosecond laser, so that a high-amplitude residual compressive stress layer with a certain depth is formed at a stainless steel weld seams area. The device for implementing the method comprises a computer control system, a powder feeder, an argon gas protection device, the carbon dioxide laser, an omni-directional reflector, a transmitting mirror, a powder feeding nozzle, a stainless steel welding part, a clamping device, a three-axis numerical control workbench, a flexible attaching film and the nanosecond laser. According to the invention, the corrosion sensitivity of the stainless steel weld seams in a corrosive environment can be greatly reduced, and the service life of the stainless steel weld seams can be prolonged, therefore, the method and device disclosed by the invention are applicable to the improvement of the corrosion resistance of various stainless steel weld seams, and also can be expanded to the improvement of the corrosion resistance of weld seams of aluminum alloys and titanium alloys and the like.

The invention discloses a large-tonnage marine corrosion prevention metal damping seismic mitigation and isolation steel supporting seat. The supporting seat comprises an upper supporting seat plate, a spherical crown liner plate and a lower supporting seat plate, wherein the spherical crown liner plate is mounted between the upper supporting seat plate and the lower supporting seat plate and consists of an upper liner plate and a lower liner plate; an liner plate mounting groove is formed in the lower supporting seat plate; the lower liner plate is fixed in the liner plate mounting groove; the upper liner plate is fixedly connected to the upper supporting seat plate; the outer bottom wall of the upper liner plate is in contact with the liner mounting groove; the bottom surface of the upper liner plate is in sliding fit with the top surface of the lower liner plate, and the fitting surface is a spherical crown surface; the outer side of the upper liner plate is provided with a falling-off prevention stopper fixedly connected with the upper supporting seat plate; the bottom surface of the falling-off prevention stopper is fixed with one end of an anti-seismic stopper through a shearing-resistant bolt; the other end of the anti-seismic stopper is in contact with the outer wall of the upper liner plate; a gap is reserved between the outer wall of the falling-off prevention stopper and the outer wall of the upper liner plate; and the a metal damper is mounted between the upper supporting seat plate and the lower supporting seat plate on the outer side of the falling-off prevention stopper. When an earthquake occurs, the supporting seat has a two-stage protecting structure, so that the supporting seat main body cannot be damaged, and falling off of beams can be avoided.

The invention relates to a thimble assembly of an in-core instrument for a nuclear power station. The thimble assembly comprises armored thermocouples, a header and neutron detectors, wherein at least one armored thermocouple and a plurality of neutron detectors are soldered and fixed together via the header; each neutron detector is a self-powered neutron detector composed of a transmitter, a collecting body, an insulator and a cable; the longest neutron detector of the plurality of neutron detectors has a length identical to the height of the whole reactor core; and the lengths of the rest neutron detectors gradually decrease at an equal interval on the base of the length of the longest neutron detector, or the neutron detectors are of a same length and axially distributed at an equal interval. The thimble assembly is simple and firm in structure and small in size and can adapt to complex environments in reactors. The thimble assembly is applicable to measurement of the outlet temperature of a reactor core in a nuclear power station and measurement of the neutron fluence rate of the core and has long service life.

The invention relates to a locking mechanism for a movable double-purpose bicycle basket, which comprises a bicycle basket consisting of a basket and a basket bottom, and the bicycle basket is fixed on a bicycle frame through a bracket, wherein the bracket comprises a vertical bracket and a transverse bracket; the vertical bracket is connected with the back wall of the basket; and the transverse bracket is in contact with the basket bottom. The locking mechanism is characterized in that the bracket is provided with a marble lock body, and the marble lock body is provided with a marble lock core which drives a bolt and is provided with a return spring A; and the basket bottom is provided with a lock catch which is matched with the bolt. After a marble lock comprising the marble lock core, the bolt and the lock catch is additionally arranged between the bicycle basket and the bracket, the safety of the bicycle basket is improved, and the bicycle basket is not easy to steal. The bicycle basket can be conveniently taken down and used as a shopping basket by only opening the marble lock so as to avoid using a plastic bag and avoid the white pollution. After the marble lock is opened, the return spring ensures that the marble lock bolt is immediately reset so as to be beneficial to taking out a key.

The invention discloses a packaging structure and a method for eliminating the internal stress of a packaged body after sensor chip packaging, thereby solving a problem of wire breaking caused by theinternal stress change of the packaged body in the prior art and reducing the influence on the chip function by the stress problem inside the packaged body. The packaging structure comprises a substrate or a frame, a chip being mounted on the surface of the substrate or frame and being connected with a pin of the substrate or frame by a wire, a first packaging layer covering the surface and the peripheral side of the chip as well as the connection point between the chip and the wire, and a second packaging layer covering the partial outer side of the first packaging layer and the surface of the substrate or frame. The second packaging layer is provided with a cavity structure for exposure of the local region of the chip.

The invention relates to a cage anti-falling speed reduction buffer device. The cage anti-falling speed reduction buffer device is composed of an electromagnetic induction speed reduction device and an auxiliary inflatable buffer device; an aluminum plate ring is fixed on a cage channel, when the cage falls, a speed sensor or an acceleration sensor exceeds a specified maximum value, automatic circuit conduction is achieved on the speed sensor or the acceleration sensor, the strong current generates a strong magnetic field, according to the Lenz's law, when the cage passes through the aluminumplate ring, the magnetic field of the induced current is always used for blocking the change of the magnetic flux of the induced current, the generated resistance enables the cage to achieve speed reduction to be descended, the cage is descended safely through the step type speed reduction, the safety of the personnel is guaranteed, and the first protection effect is achieved; and a proximity switch enables a trigger to act, the current is sent to an igniter, the sodium nitride propellant contained in the igniter is ignited, then a large amount of harmless gas which takes nitrogen as a main gas can be generated, an air bag is inflated to a full state, and a second protection effect is achieved. According to the cage anti-falling speed reduction buffer device, the design is simple, the weight of the cage cannot be increased, the long-standing technical problem that the cage falls due to the facts that the case suffers from rope breakage, failed braking and failure of an anti-falling device are solved, the work is reliable, the safety performance is high, and the practicability is high.

The invention discloses a wireless detection device for safety pressure bar locking of amusement equipment, comprising a seat glass steel and a console. The inner wall of the seat glass steel is fixedly connected with a fixing member, and one end of the fixing member is rotatably connected with a gas spring, a connecting plate is rotatably connected to an end of the gas spring away from the fixingmember, a safety pressure bar is fixedly connected to an end of the connecting plate away from the gas spring, and a ratchet device is arranged at the connection between the safety pressure bar and the connecting plate. One end of the safety pressure bar, far away from the ratchet device, is fixedly connected with a pressure bar frame, the inner wall of the seat glass steel is rotatably connectedwith a locking limit bar through a rotation shaft, and one side of the locking limit bar, near the end of the ratchet device, is provided with a first pawl corresponding to a ratchet. The wireless detection device has the advantages of simple structure, easy operation, safety locking of the passengers, avoidance of loss caused by manual judgment and improvement of safety of play, and is suitablefor wide popularization.

The invention relates to a secondary protection small rail car. The secondary protection small rail car comprises a joist steel rail, a motor, a gear shaft, a driving wheel installation plate, a driving travelling gear, a secondary protection device, a driven wheel installation plate, a driven travelling wheel, a hanging head bolt, a fixing bolt, a hexagon bolt and a nut. The secondary protection small rail car has the advantages that the structure is skillful and reasonable and stably walking on the joist steel rail can be achieved; the secondary protection device and the rail are not in contact when the small car normally works, so that when the small car falls off due to the fact that the travelling wheel falls off, the secondary protection device and the joist steel rail are locked, the small car is avoided from falling off, and the secondary protection device plays a role in protecting the small rail car secondarily.

The invention relates to the technical field of three-element material power batteries, and particularly provides a high-temperature three-element material power battery which comprises a positive pole, a diaphragm, a negative pole, an electrolyte, a cover plate and a shell, wherein the active substance of the positive pole is a three-element positive pole material of which the nickel:cobalt:manganese ratio is 1:1:1. The positive pole current collector is carbon-coated aluminum foil. The diaphragm is a coated diaphragm, the diaphragm matrix is polypropylene, and the coating is ceramic. The negative pole is natural flaky graphite powder. The electrolyte comprises an organic solvent and an additive; the organic solvent is a mixed solution composed of 30-35 wt% of ethylene carbonate, 35-40 wt% of methylethyl carbonate and 30-35 wt% of diethyl carbonate; and the additive is a mixed solution composed of vinylene carbonate which accounts for 2-2.5 wt% of the organic solvent, 1,3-propenyl carbonate which accounts for 2-2.5 wt% of the organic solvent and propenyl sulfite which accounts for 2-2.5 wt% of the organic solvent; and 0.3-0.5mu m silica gel is coated inside the shell. The test on the product under the condition of 3000 cycles or above at high temperature is passed. In the pin-prick test period, no naked fire is seen, the shell does not explode, and thus, the power battery has higher safety.

The invention provides a limb protection air bag in a vehicle cab, and belongs to the technical field of vehicles. The limb protection air bag solves problems that an existing air bag cannot protect limb at the same time and impact force is large at the opening moment. The limb protection air bag in a vehicle cab comprises a housing, a cover plate, an air pocket, and a gas generator. The air pocket comprises an upper part which expands upward after inflation, and a lower part which expands downward after inflation. The upper part and the lower part respectively comprises a front sheet which faces the side of a seat after expansion, and a rear sheet connected with the gas generator. Unelastic draw strings are respectively connected between the gas generator and the front sheet of the upper part, and between the gas generator and the front sheet of the lower part. The rear sheets of the upper part and the lower part are respectively provided with a plurality of folds. The openings of the cover plate and the housing are provided with connection structures which make the cover plate move a distance relative to the housing when the air pocket is inflating. A U-shaped large volume air pocket makes the cab has a function of protecting limbs, and arrangement of the draw strings, the cover plate, stay wires, and a spacing belt makes the air bag smoothly unfold, and the air bag is safer when being unfolded.

The invention discloses a climbing type steel wire rope ladder and solves the aerial work problem of difficulty in climbing up and down between an overhead transmission line pole tower cross arm and a conducting wire. The climbing type steel wire rope ladder comprises a plurality of stirrup type pedals, a main rope ladder steel wire rope and a conducting wire hook, wherein the stirrup type pedals are inserted into the main rope ladder steel wire rope through upper-end steel wire ropes of pedal steel wire rope sleeves; the pedal steel wire rope sleeves are fixedly arranged on the main rope ladder steel wire rope; an upper end steel wire rope sleeve and a lower end steel wire rope sleeve are respectively inserted into the two ends of the main rope ladder steel wire rope; an upper U-shaped ring is arranged on the upper end steel wire rope sleeve in a sleeving way; the lower end steel wire rope sleeve is connected with the conducting wire hook through a lower U-shaped ring. The climbing type steel wire rope ladder has the benefits that the climbing type steel wire rope ladder is not limited by an overhead transmission line pole tower type when in use, is easily operated, is convenient to carry, is practical and flexible, is safe and reliable in field operation, can be operated by one person and has a secondary protection function of preventing the conducting wire to fall off; the high-altitude operation labor intensity and the work and operation risk of operation personnel on a tower are reduced, the working efficiency is improved, and the field operation cost is lowered.

The invention provides comprehensive mixing treatment equipment for a sludge settling tank. The comprehensive mixing treatment equipment comprises a formation surface, an embedded steel plate, a hanger bracket, a hanger supporting pillar, a stainless steel lifting chain, an electric traction lifting bracket device, a conveniently-fixed stirrer structure, a stirring fixed limiting seat structure, acable retracting box structure, a falling prevention buckling structure, cross stay bars, a connecting plate, a supporting guide rod, a sliding chute, a sludge settling pond wall and a control switch, wherein the embedded steel plate is in bolted connection with the right-side position of the upper surface of the foundation surface. According to the comprehensive mixing treatment equipment provided by the invention, by arrangement of a hand-drive block, a pulling rope, a guide roller and a winding motor, the stirrer is beneficially released, and the stirring requirements on the sludge settling ponds with different depths can be met; by arrangement of a driving motor and a stirring impeller, sludge in the sludge settling pond is favorably stirred and a stirring effect is realized; a falling prevention strap is arranged to beneficially realize a secondary protecting effect on a submersible stirrer enclosure and the stirring impeller and enhance the fall prevention function.

The invention discloses a fall prevention device designed by virtue of electromagnetic induction and current action, for an elevator. An elevator car is dragged to run along a guide rail through a motor in an elevator shaft; the elevator car is an aluminum car or a steel car; a plurality of groups of first electromagnetic coils and a plurality of speed sensors are vertically and uniformly arrangedat the two sides of the elevator shaft at intervals; the first electromagnetic coils are connected with a control relay, the speed sensors and a power supply through circuits, and the control relay is in a normally-open state; when the descending speed of the elevator car is greater than a set speed, the speed sensors enable the plurality of groups of first electromagnetic coils to generate a magnetic field through the normally-closed state of the control relay; at this moment, the elevator car moves in the magnetic field, the elevator car generates an induced current, the descending speed ofthe elevator car is continuously reduced through the action of an Ampere force, so that the elevator car slowly descends; and a plurality of groups of second electromagnetic coils and a plurality ofgroups of spring devices are correspondingly arranged at the bottom of the elevator shaft in a matching manner, and the effect of triple protection is acted on the descending of the elevator car.

The invention relates to an industrial robot hollow cable protection structure. The industrial robot hollow cable protection structure comprises a motor base and a hollow speed reducer; an output endof the hollow speed reducer is connected with a wrist body; and a hollow shaft driving end is connected with a driving belt wheel. The industrial robot hollow cable protection structure further comprises a hollow wire passing sleeve whose two ends are mounted in a stop port of the wrist body and on the driving belt wheel, a T-shaped wire passing sleeve connected to the motor base, and a robot cable penetrating through the hollow wire passing sleeve and the T-shaped wire passing sleeve and bound on the T-shaped wire passing sleeve through a binding belt. The industrial robot hollow cable protection structure can guarantee concentricity of the wire passing sleeves and the speed reducer to prevent wear of the hollow wire passing sleeve, and can prevent deflection of cables to reduce direct contact between the cables and the hollow wire passing sleeve to achieve secondary protection effect, so that the service life of the cables is effectively prolonged, the reliability of the cables is greatly improved, the robot stability is guaranteed, and the maintenance cost is reduced.

The invention discloses a scratch-free conveying and cutting device for a sectional material. The scratch-free conveying and cutting device comprises a machine frame and a cutting assembly, wherein the cutting assembly is arranged on the machine frame and is used for cutting the sectional material; a feeding assembly for conveying the uncut sectional material is arranged on one side of the cuttingassembly; a discharging assembly used for conveying the cut and formed sectional material is arranged on the other side of the cutting assembly; a pressing assembly used for pressing the sectional material and a floating-up assembly arranged right below the pressing assembly are arranged on the machine frame; and a side pushing assembly arranged on the machine frame and located on one side of thesectional material is arranged between the pressing assembly and the floating-up assembly. The scratch-free conveying and cutting device has the advantages that the pressing assembly and the floating-up assembly are coordinated with each other to accurately position the sectional material, so that the situations that the sectional material is damaged, and the pressing assembly cannot be tightly attached to the surface of the sectional material due to the fact that the applied pressing force is too large can be effectively avoided, and the yield is greatly increased; and meanwhile, the pressing assembly is arranged, no influence is caused to replacement of a saw blade, and therefore the working efficiency is greatly improved.

The invention belongs to the technical field of seasonings, and particularly relates to steady-state sesame salt. The formula comprises sesame seeds, an adhesive and a seasoning; wherein the adhesiveis a compound of a starch substance and an edible gum, and the mass ratio of the starch substance to the edible gum is (1-9): 1; and the product form is granular. In the invention, the edible adhesiveis adopted to bond the fried sesame together, and the typical characteristic is that before eating, the sesame exists in the form of complete grains and is not crushed, and the coated edible adhesivealso plays a role in isolating from air and can play a secondary protection role. Compared with traditional commercial sesame salt, the steady-state sesame salt provided by the invention has the technical advantages that the oxidative rancidity process of grease can be delayed, the salt powder layering phenomenon is avoided, and the like, meanwhile, the steady-state sesame salt has the characteristics of fresh keeping, fidelity, taste keeping and quality guaranteeing, and the uniformity of flavor in storage and eating is kept.

The invention discloses a flat type anti-interference data cable, which comprises eight bunch-stranded wire cores; tin layers are plated on the surfaces of all soft circular conducting wires; the bunch-stranded wire cores are pairwise stranded to form a white blue shielding pairwise-stranded group, a white orange shielding pairwise-stranded group, a white green shielding pairwise-stranded group and a white brown shielding pairwise-stranded group; the four pairs of shielding pairwise-stranded groups are placed in parallel and positioned in the same plane; a sheath layer is coated on the outer surfaces of the four pairs of shielding pairwise-stranded groups, and adjacent shielding pairwise-stranded groups are isolated from each other through the sheath layer; and the sheath layer is mainly formed by materials with the mass percentages as follows: 45 percent to 50 percent of polyvinyl chloride (PVC) resin, 8 percent to 10 percent of calcium carbonate, 14 percent to 22 percent of phthalicacid methyl ester, 21 percent to 23 percent of trioctyl trimellitate, 0.18 percent to 0.22 percent of pentaerythritol ester, 2.0 percent to 2.5 percent of compound lead salt stabilizing agents and 0.3 percent to 0.36 percent of PVC antistatic agent. The cable disclosed by the invention has a characteristic of super flexibility; external electromagnetic interference can be effectively prevented from entering the cable, and meanwhile, internal signals can be prevented from being radiated out; and besides, the electrostatic elimination is facilitated.

The invention relates to a duplex building elevator guide shoe to solve the technical problem that in the prior art, the performance of a wheel shaft of a cantilever structure is unstable. The duplexbuilding elevator guide shoe comprises a guide shoe base, the roller shafts and the rollers, the guide shoe is clamped on a lift car guide rail through a guide rail clamping groove formed on the guideshoe base, the rollers rotationally installed on the roller shafts can roll along the lift car guide rail, and the friction force during the running process of a lift car can be reduced while the guide effect is achieved. The guide shoe base is provided with a roller mounting cavity, the roller shaft holes for mounting the roller shafts are correspondingly formed on the two side walls of the roller mounting cavity, the roller shafts are mounted in the roller shaft holes, and the two ends of the roller shafts are supported by the roller shaft holes, so that a stable supporting structure is formed, a cantilever structure is avoided, and the roller shafts are not prone to deformation due to the fatigue or other reasons.

The invention discloses a crawling ladder device used for a manual hole digging pile and a method for going up and down a wellhole of the crawling ladder device, and belongs to the technical field ofcapital construction auxiliary equipment design and manufacturing. The crawling ladder device used for the manual hole digging pile and the method for going up and down the wellhole of the crawling ladder device are safe in use and large in working space, can be used circularly, and is low in cost. The crawling ladder device includes a soft crawling ladder, a limiting supporting system and a crawling ladder supporting frame. The crawling ladder device is limited by the limiting supporting system at the arrangement position in the radial direction in a pile hole through the crawling ladder supporting frame and the soft crawling ladder detachably hanged in the pile hole. The method for going up and down the wellhole is based on the crawling ladder device. Firstly the soft crawling ladder isput into the pile hole to be well supported; then a worker goes down into the pile hole; after the worker finishes, the soft crawling ladder and the limit supporting system are taken away to clear a space; and when the worker needs to go up, the soft crawling ladder and the limit supporting system are put down. The method for going up and down the wellhole not only overcomes the problem that people is prone to step empty on the soft crawling ladder, but also overcomes the problem that a rigid crawling ladder occupies the space so that unearthing is affected.

The invention discloses a data cable with an interference shielding function. The data cable comprises eight bunch stranded wire cores; a tin layer is plated on the surface of each soft round lead; every two of the eight bunch stranded wire cores are twisted with each other to form a white-blue shielded twisted group, a white-orange shielded twisted group, a white-green shielded twisted group and a white-brown shielded twisted group; the four shielded twisted groups are placed in parallel and positioned in the same plane, a sheath layer covers the outer surface of the four shielded twisted groups, and the adjacent shielded twisted groups are isolated through the sheath layer; and the sheath layer mainly comprises the following materials in percentage by mass: 47 to 48.27 percent of polyvinyl chloride (PVC) resin, 9 to 10 percent of calcium carbonate, 18 to 21.54 percent of dimethyl phthalate, 21 to 22 percent of trioctyl trimellitate, 0.18 to 0.2 percent of pentaerythritol ester, 2.0 to 2.2 percent of composite lead salt stabilizer, and 0.33 to 0.34 percent of PVC antistatic agent. The data cable has super flexibility, effectively prevents external electromagnetic interference from entering, blocks internal signals from being radiated out at the same time, and is beneficial to static elimination.

The invention relates to an anti-falling net for power transmission construction. The anti-falling net comprises an anti-falling net body, a supporting rod, a rotating shaft arranged at the upper endof the supporting rod and supporting legs arranged at the lower end of the supporting rod, wherein the anti-falling net body comprises a fan-shaped net main body, a fixed rod and a movable rod, and the fixed rod and the movable rod are arranged at the two ends of the fan-shaped net main body; the fixed rod is fixedly connected with the supporting rod; and the movable rod is fixedly connected withthe rotating shaft. The anti-falling net is high in safety, simple in structure and capable of preventing workers on the ground from being hit by high-altitude falling objects.

The invention discloses a secondary protection temperature controller, and relates to the field of design technologies of temperature sensors and controllers. The secondary protection temperature controller comprises a plastic pedestal, wherein the plastic pedestal is provided with a sealing cover buckle thereon, and the internal part of the plastic pedestal is provided with a spring piece, a bimetallic strip, a guide pillar and a plug plate set; one end of the spring piece is connected with the plastic pedestal through a first rivet, and the lower surface of the other end of the spring piece is provided with a moving contact; the lug plate set comprises a first lug plate, a connecting sheet and a second lug plate; the first plug plate is connected to the plastic pedestal through a first rivet and a second rivet; the connecting sheet is arranged on the plastic pedestal below the spring piece through a third rivet, and a static contact matched with the moving contact is arranged above the third rivet; and the plastic pedestal is further internally provided with a fuse wire. The secondary protection temperature controller disclosed by the invention is simple in structure and easy to realize, and a secondary protection function is realized on a condition that the secondary protection temperature controller has functions of products of the same kind, so that the product safety and the product reliability are substantially improved.

The invention discloses a secondary protection structure for an automobile safety belt, wherein the structure has a high safety coefficient. The structure comprises an automobile body and an automobile seat, wherein an upper retracting device and a lower retracting device are disposed in the automobile body; one end of a shoulder strap is connected to the upper retracting device; the other end of the shoulder strap is connected to a first lock catch; a first lock catch shell body matched with the first lock catch is disposed on the bottom of the automobile body located on onside side of the automobile seat; a first unlocking button is disposed on the first lock catch shell body; one end of a waistband is connected to the lower retracting device; the other end of the waistband is connected to a second lock catch; a second lock catch shell body matched with the second lock catch is disposed on the automobile body bottom located on one side of the automobile seat; and a second unlocking button is disposed on the second lock catch shell body. The structure has the advantages that secondary protection can be implemented through double-layer separate protection of the shoulder strap and the waistband; the safety coefficient is high; and people's safety can be effectively guaranteed when the people go out.

The invention discloses novel self-adaptive luggage, and belongs to the field of luggage. Through arrangement of a self-adaptive air bag and a self-expansion interlayer, the self-adaptive luggage comprises two containing petals, which are close to each other, and one edges of which are rotatably connected with each other; when few articles are placed in the luggage, the self-adaptive air bag is inflated through an inflating pipe, so that the air expansion adaptive layer is attached to the articles; then, the articles are mutually extruded to form a whole, the self-expansion interlayer loses the constraint effect of the air expansion adaptive layer, and the fluctuating expansion layer expands under the action of air, so that another buffer layer with a relatively large span is formed in theself-adaptive air bag; when the luggage is subjected to larger bumping, the whole article is vibrated and makes contact with the inner walls of the containing petals, and the self-expansion interlayer can play a secondary protection role on the article; and compared with the prior art, the situation that the articles are disordered and even scattered due to the fact that fewer articles are contained is remarkably reduced, and the using effect is effectively improved.