66results about How to "Timely adsorption" patented technology

The invention relates to an organic waste water decoloration treatment technology, in particular to a photocatalyst, a preparation method and application thereof. The grain size of the photocatalyst is 1 to 100 nanometers; nano cuprous oxide particles are attached to the surface of fine kieselguhr to form a nano cuprous oxide / kieselguhr carrier photocatalyst, wherein the weight ratio of cuprous oxide to kieselguhr is (0.58-0.87) to (1.0-2.0). By using the nano cuprous oxide / kieselguhr carrier photocatalyst, visible light or sunshine can be used as a light source for decoloration of organic colored waste water of pharmacy, papermaking or printing and dyeing industries. The production process is simple, industrialization is easy to realize, the problem of solid and liquid separation in the process of producing nano Cu2O by a hydrolysis method is solved, nanoparticles are effectively prevented from being agglomerated and the photocatalyst can be conveniently recycled and utilized.

The invention relates to a communication cabinet with good ventilating and dust-removing effects, which can effectively solve the problem that the stability of the communication cabinet is affected due to bad radiating and dust-removing effect of the existing communication cabinet. A plurality of gas inlet boxes are arranged on outer side surfaces of the left, the right and the rear side plates of a cabinet body, wherein the gas inlet boxes are hollow rectangular box bodies; a gas inlet fan is arranged on one side surface of each of the gas inlet boxes; a plurality of tapered tubes are arranged on the other side surface of each of the gas inlet boxes; tapered holes corresponding to the tapered tubes are arranged in the tapered tubes; one end with a greater diameter, of each of the tapered tubes is arranged inside a cavity of each of the gas inlet boxes, and one end with a smaller diameter, of each of the tapered tubes is arranged outside each of the gas inlet boxes; a plurality of tapered through holes are formed in the side plates of the cabinet body; one end with the smaller diameter, of each of the tapered tubes is arranged in the corresponding tapered through hole; two dust-absorbing barrels which are vertically arranged are arranged in the cabinet body; a plurality of gas inlets are formed in the dust-absorbing barrels; the dust-absorbing barrels are filled with dust-absorbing materials; air-exhausting fans are arranged at the upper ends of the cavities of the dust-absorbing barrels; an air outlet is formed in a cover plate at the upper end of the cabinet body; a ventilating way is active, so that dust in the cabinet body can be timely adsorbed, and therefore, the communication cabinet is innovation of communication cabinet.

The invention relates to a preparation method of a sulfydryl-grafted and photocatalyst-loaded high silica glass fiber for soil pollution remediation. The preparation method comprises the steps: firstly, purifying mercaptopropyl trimethoxy silane, then evenly dispersing in an organic solvent, and carrying out a reaction with a high silica glass fiber, to obtain a high silica glass fiber with the surface grafted with sulfydryl for improving the adsorption property on heavy metal ions; and then immersing the multiscale enhancement high silica glass fiber and photocatalyst particles into an Na3PO4 solution, treating, then filtering, washing and drying, and generating a multiscale enhancement body sulfydryl-grafted and photocatalyst-loaded high silica glass fiber composite material. The preparation method has the beneficial effect that the invention provides the preparation method of the sulfydryl-grafted and photocatalyst-loaded high silica glass fiber for soil pollution remediation, wherein the method has the advantages of simple process, low cost, wide applicable scope and no secondary pollution.

The invention discloses a C9 petroleum resin prehydrogenation catalyst. The C9 petroleum resin prehydrogenation catalyst, by weight, comprises 30-50% of an active component M1 of a laminar structure,20-40% of an additive component M2 and the balance a carrier according to 100 weight percentages, the component M1 comprises Ni, Mn, Al and Mo, the component M2 comprises Ca and Mn, and the carrier isamorphous form aluminum silicon. The invention further discloses a preparation and application of the catalyst. The catalyst is used for C9 petroleum resin prehydrogenation, has the functions of hydrogenation adsorption desulfurization and dechlorination, and can effectively avoid sulfur and chlorine poisoning of a main hydrogenation catalyst at a late stage.

The invention relates to a processing device for an inner container of an electric rice cooker, comprising a frame body, a first grinding roller, a scissor frame and a base, a control panel is arranged on one side of the base, and a groove body is arranged inside the base, and the top of the base A first support column is installed at one end, and a first motor is fixed on the base on one side of the first support column through a first vertical rod, and a first rotating shaft is installed at the output end of the first motor, and the first rotating shaft passes through the The first support column, the side of the scissor frame close to the second motor is equipped with a hydraulic telescopic rod, and the two ends of the scissor frame away from the second motor are fixed with second grinding rollers. The present invention installs the second motor, the first chute, the first slider, the scissor frame, the hydraulic telescopic rod and the second grinding roller, and adjusts the hydraulic telescopic rod so that the first slider slides in the first chute, thereby Control the scissor frame to change the distance between the second grinding rollers, which is convenient for fixing the inner tank bodies with different diameters.

The invention discloses an agricultural seed storage device. The agricultural seed storage device comprises a box body, the interior of the box body is divided into a disinfection chamber and an object storage chamber through a separation plate, ultrasonic disinfection lamps are fixed to the side walls of both opposite sides inside the disinfection chamber, multiple bottle grooves are uniformly formed in the inner surface of the bottom of the object storage chamber, seed bottles are clamped to the bottle grooves, labels are attached to the surfaces of the seed bottles, bottle lids are in threaded connection with the tops of the seed bottle, the tops of the bottle lids are in a grid shape, an air pipe is communicated with the side, close to the object storage chamber, of the box body through a through hole, and a stepping air blower is communicated with the end, away from the box body, of the air pipe. The agricultural seed storage device is simple and reasonable in structural design, and convenient to operate; seeds can be disinfected and sterilized, the fine properties of the seeds is guaranteed, the environment in the box body is improved, the seeds are conveniently stored, it isavoided that the storage of the seeds is influenced and the phenomenon of mildew is caused due to humid air, the seed storage device is conveniently moved, and the labor is saved.

The invention relates to shotcrete and belongs to the field of high-performance concrete. The shotcrete solves the problem that in use of the existing shotcrete, raw materials are wasted. The shotcrete comprises, by weight, 190 to 214 parts of water, 380 to 428 parts of Portland cement, 950 to 990 parts of sand, 610 to 684 parts of broken stones, 5.86 to 7.06 parts of a water reducing agent, 16 to16.32 parts of an accelerator, 0.7 to 0.9 parts of 2, 6-dimethyl-7-octene-2-ol and 0.6 to 1 part of cis-3-hexenyl formate. After the concrete is sprayed onto the sprayed surface, the cohesion of theraw material particles is increased so that the raw material particles are timely adsorbed to the sprayed surface and the rebound rate of the shotcrete is reduced.

The invention relates to a neurosurgical scalpel, which comprises a knife handle and a blade; the neurosurgical scalpel is characterized in that the blade is arranged at one end of the knife handle and a liquid storage box is detachably arranged at the other end; the blade is of a hollow structure; a plurality of liquid collecting holes are formed in a knife edge part close to the blade; each liquid collecting hole communicates with an arc-shaped diversion channel in the blade; a diversion pipe is arranged in the knife handle; one end of the diversion pipe communicates with the arc-shaped diversion channel and the other end communicates with the liquid storage box; a one-way valve is arranged in the diversion pipe; a transparent cover is arranged on the back of the blade; a lighting lamp is arranged in the transparent cover; a power supply and a switch of the lighting lamp are arranged in the knife handle; and a rotating blade sleeve is arranged on the knife handle. The neurosurgical scalpel has the advantages that a liquid waste in the surgical procedure can be timely adsorbed, the definition of the surgical field is facilitated through arrangement of the lighting lamp, and the collected liquid waste is discharged into the liquid storage box through the diversion pipe.

The invention discloses a pretreatment method for wastewater produced in an o-isopropoxyphenol (OP) production process. The pretreatment method comprises the following steps: a polyferric silicate sulfate copper composition and a first auxiliary filter agent are added into the wastewater produced in the o-isopropoxyphenol production process, then pH is adjusted to 3.5-5.5, stirring is performed, filtration is performed, and therefore wastewater of which phenol is removed is obtained. The pretreatment method has a good removing effect on phenolic compounds, small investment, low operating costs, and is convenient for engineering promotion and application.

The invention provides a motor shaft conveying line which comprises a mounting frame fixedly arranged at one end of a conveying mechanism, a first support arranged on the mounting frame in a sliding mode, a conveyor belt rotatably arranged on the first support, an adjusting mechanism arranged on the first support in a sliding mode and a power mechanism used for driving the first support to slide. According to the motor shaft conveying line, the structure is simple, the first support is arranged at one end of the conveying mechanism, a motor shaft rolls onto a containing cavity and is conveyed to the next procedure through the conveyor belt in the containing cavity, the size of the containing cavity can be adjusted, and conveying of motor shafts of different specifications is realized.

The invention relates to a motor shaft conveying device. The motor shaft conveying device comprises supporting frames, a fixing frame which is movably installed on the supporting frames, a propelling mechanism which is movably arranged between the supporting frames and a driving device which is used for driving the propelling mechanism to do circular motion, a plurality of installation grooves are formed in the fixing frame, and motor shafts are installed in the installation grooves. The motor shaft conveying device is simple in structure, the motor shafts can slide leftwards or rightwards through lifting of a left movable plate and a right movable plate, in ingenious cooperation with the installation grooves, lantern rings on the motor shafts are detected by utilizing the installation grooves, and meanwhile oiling treatment is carried out on the motor shafts by utilizing left-right sliding of the motor shafts.

The invention provides an under-pressure drilling device for an oil-gas well mouth. The device comprises an elevator, a pressure balance pipe, a pressure balance valve, a drilling unit, a packing component, an adapter, a blowout prevention nozzle, a blowout prevention valve, a gate valve, a drill rod string, a pressure balance manifold, and a control console; the elevator is arranged at the end ofthe pressure balance pipe; the middle of the pressure balance pipe is of a hollow structure; the pressure balance valve is arranged at the other end of the pressure balance pipe; the drilling unit comprises a power mechanism and an executing mechanism which are connected with each other; the executing mechanism is arranged at one end of the pressure balance valve; in the drilling direction, the packing component, the adapter, the blowout prevention nozzle, the blowout prevention valve and the gate valve are connected in sequence; the drill rod string is arranged in the drilling device; one end of the pressure balance manifold is communicated with the hollow structure of the pressure balance pipe, and the other end is communicated with the adapter or the blowout prevention nozzle; and thecontrol console is used for starting tripping of the drill rod string and controlling the drilling speed of the drill rod string. The under-pressure drilling device for the oil-gas well mouth is convenient to operate and good in sealing performance.

A polar mixed reagent for low-rank coal flotation and a flotation process are suitable for the technical field of low-rank coal mining. The polar mixed reagent is prepared from the following raw materials in parts by mass: 30-44 parts of short-chain ester, 30-44 parts of n-caprylic acid, 3 parts of sec-octyl alcohol, 7 parts of fatty acid polyoxyethylene ether, 5 parts of Tween 40, 4 parts of span80 and 7 parts of CuSO4. During use, the reagent is fully and uniformly mixed in an aqueous solution in advance by using a stirring barrel and ultrasonic waves emitted by an ultrasonic plate. The reagent consumption is low, the flotation recovery rate is increased, different types of reagent molecules are fully dispersed into an ore pulp solution, the size of collecting agent oil drops is reduced, the reagent can be more efficiently and effectively spread on the surfaces of coal particles, the action efficiency of the reagent is greatly improved, the recovery rate of clean coal is increased,and pollution to the coal-series environment is reduced.

The invention discloses a cladding method for the inner wall of a pipeline and belongs to the technical field of laser cladding methods. Alloy powder is cladded on the inner wall of the pipeline to be machined, and a cladding layer is obtained. By means of the cladding method, the corrosion resistance and abrasion resistance of the inner wall of the pipeline are effectively improved, the service life of the pipeline is prolonged, and the operability for conducting laser cladding on the inner wall of the pipeline is improved; effective metallurgical bonding is achieved between the alloy powder and the inner wall of the pipeline, so that the cladding layer is prompted to have good oxidization resistance, impact resistance and thermal fatigue resistance. The cladding method can meet requirements for the high technology and automation development of enterprises.

A gypsum wall grinding dust collection device includes a rack [1]; the rack is provided with an abrasive cloth fixing plate [2] which is used for fixing an abrasive cloth for grinding a wall; and the rack is provided with a dust collection pipe [3] which is connected to a motor [4] and a dust collection basket [5]. During use, the abrasive cloth is moved on the gypsum wall, generated dust is synchronously sucked into the dust collection basket [5] via the dust collection pipe, and then pollution to the environment can be reduced. The rack [1] is transparent, and thereby facilitating observation and fixing; a dust monitoring module [6] is provided and can monitor on-site dust, and then the operation parameter of the motor can be adjusted; a sensing device [7] is arranged in the dust collection basket [5], and sends prompt information when the dust collection basket is filled with dust, wherein the manner of information prompt may be voice or LED light display. The gypsum wall grinding dust collection device can monitor on-site dust in real time and suck dust timely, and then pollution to the environment is reduced, and indoor air circulation can be ensured.

The invention provides a public garbage can, and relates to the technical field of collecting devices. The public garbage can comprises a can body. The can body comprises a can cover, a base and a main can body. The can cover is arranged on the top face of the main can body. The base is detachably connected to the bottom face of the main can body. A bamboo charcoal adsorption layer is arranged on the top face of the main can body. A transversely-arranged spraying pipe is arranged on the top face in the main can body. Vaporific sprayers are arranged at the lower end of the spraying pipe. A baffle is arranged at the bottom end of the outer side wall of the main can body. The baffle is provided with a water collecting tank and a water absorbing pump. The water collecting tank is internally provided with a temperature sensor and an electric heating device. A temperature display is arranged on the outer side wall of the water collecting tank. The temperature display is electrically connected with the temperature sensor. A water inlet pipe is connected between the water collecting tank and the water absorbing pump. A water outlet pipe is connected between the water absorbing pump and the spraying pipe. Wheels are arranged on the bottom face of the base. The public garbage can is capable of adsorbing and covering peculiar smells given out from the public garbage can in time, dirt at the bottom in the can is thoroughly cleaned away, and moving and using are flexible.

The invention provides a motor shaft conveying system which comprises a support fixedly arranged on a conveying mechanism, an oiling mechanism arranged on the support in a lifting mode and a power mechanism driving the oiling mechanism to move up and down, wherein the oiling mechanism comprises an oiling part which enables the oiling mechanism to be in contact with the motor shaft under the driving of the power mechanism so as to generate extrusion deformation. According to the system, the structure is simple, the motor shaft can be oiled through an upper oiling bin, the upper oiling bin can slide, the position of the upper oiling bin can be adjusted, the coating area of the motor shaft can be maximized, the coating position is more accurate, and the coating effect is better.

The invention discloses a dust collection device for a bulk cement car loader. The dust collection device for the bulk cement car loader comprises a base, a vertical plate, a sliding rail, a first limiting block, a beam, a conveyer belt, a first motor, a first belt, a dust collection cover installation block, a dust collection cover, a rack, a gear installation rod, a gear, a second motor, a second belt, a filtration chamber, filtration chamber supporting rods, a dust outlet, an exhaust fan, a hose, an air inlet pipe, an air outlet pipe, a dust collection cloth bag, a top cover, an air blowingpipe and the like. The dust collection device for the bulk cement car loader has the advantages of being reasonable and simple in structure, low in production cost and convenient to install; becausethe height and the angle of the dust collection cover are adjustable, it is convenient for the dust collection device to be aligned with the car loader, most dust can be adsorbed in time, it is guaranteed that a site environment is not destroyed, and dust is prevented from causing harm to human bodies; because the dust collection cloth bag of the dust collection device can be quickly detached andmounted so as to be replaced without needing too much time, and therefore, production is not influenced; and the dust collection device can be removed, the suitability is greatly improved, the dust collection device not only can be used for the car loader and but also can be removed to other places for use as well.

The invention belongs to the technical field of medical latex gloves, discloses antibacterial sweat-absorbent medical latex gloves and a preparation method thereof, and aims to solve the problem that existing latex gloves do not have sweat-absorbent and bactericidal capabilities. The medical latex gloves are prepared from the following raw materials in parts by weight: 30-70 parts of natural rubber, 5-9 parts of carboxy nitrile rubber, 10-30 parts of gauze, 10-30 parts of an anti-aging agent, 10-30 parts of an antioxidant, 3-7 parts of sulfur, 30-70 parts of absorbent cotton, 5-9 parts of a rhizoma dioscoreae septemlobae extract, 5-9 parts of calcium sulfate, 5-9 parts of potassium hydroxide, 10-14 parts of a stabilizer and 10-14 parts of an anti-cracking agent. The glove prepared by the invention has good sweat absorption and sterilization capacities, so that when a medical worker wears the glove, sweat generated by the hand of the medical worker can be timely adsorbed, the latex glove can be ensured to be attached to the hand of the medical worker, and the glove has good practicability.

The invention discloses an asphalt adhesive layer spreading device for annular-road curved surfaces and a method. The device comprises a spreading vehicle and an asphalt tank body arranged on the spreading vehicle; one side of the asphalt tank body is provided with a spreading device body for uniform spreading on the curved surfaces and a spreading adjustment device for adjusting a distance between the spreading device body and the curved surfaces, the spreading device body comprises a hose and a steel pipe which are communicated with the asphalt tank body, the axial outer side of the steel pipe is communicated with a circular pipe, the end, away from the asphalt tank body, of the hose is sealably communicated with the circular pipe, the axial outer side of the steel pipe is communicated with at least one nozzle corresponding to the curved surfaces in position, the hose is in sealed connection with the asphalt tank body, one end of the hose sleeves the outer circumference of the steelpipe and is in sealed connection with the steel pipe through a sealing sleeve, and the junction of the hose and the steel pipe is coated with an adhesive; the spreading distance between one end of thesteel pipe and the curved surfaces can be adjusted according to the spreading adjustment device, and uniform spreading on the curved surfaces different in curvature can be adapted to.

The invention discloses an environment-friendly anti-convolution dust collector for an ironmaking blast furnace. The structure of the dust collector comprises a cylinder body, an air inlet, an outlet,an anti-convolution device, a cone, an ash discharging port and a support frame. The invention has the following beneficial effects: a triangle pyramid is used as a magnetic structure to timely adsorb metallic substances in the separated dust particles so as to avoid the metallic substances from being discharged along with the dust particles and prevent the heavy metal pollution to the environment; by setting the inner included angle between the triangle pyramid and the cone cylinder to be less than 45 degrees and greater than 20 degrees, an auxiliary acceleration effect is effectively provided for the falling of the separated dust particles; since bend holes have a folded line structure and have orientation consistency, the separated dust particles will not be rolled up to be mixed withunseparated dust particles for lost work when the airflow is in backward movement; and a circular ring formed by a disc and an arc-shaped ring is used as a hourglass structure to accelerate the flow velocity of the dust particles.

The invention discloses a cleaning device for hot bending production of a cover plate of a mobile phone and relates to the technical field of production of cover plates and mobile phones. The cleaningdevice comprises a bottom plate. A bracket is fixed to the top of the bottom plate, a cleaning box is fixed to the top of the bracket, a suspended hood is fixed to one side of the top of the cleaningbox, a feed inlet is formed in one side surface of the cleaning box, a discharge hole opposite to the feed inlet is formed in the other side of the cleaning box, and a rinsing cabin and an air-dryingcabin are formed in the cleaning box through a partition plate. The cleaning device can be used for dedusting and cleaning a hot bended die, needed to be cleaned and dedusted, of the mobile phone allaround. A closed cleaning environment prevents external dust from entering the cover plate effectively, so that the quality of the cleaned hot bended die is guaranteed. As manual cleaning is not needed, the labor intensity of workers is reduced and the work efficiency is improved. Moreover, the problem of unthorough cleaning of manual cleaning as same duster cloth is used frequently is avoided.

The invention discloses a tea leaf screening, drying and impurity removing integrated device and a tea leaf processing method. The tea leaf screening, drying and impurity removing integrated device comprises a conveying mechanism, a feeding box and a dust removing box. The conveying mechanism comprises a rotating roller and a caterpillar band, the rotating roller is sleeved with the caterpillar band and is electrically driven, a supporting frame is arranged below the rotating roller, and the rotating roller is in rotating fit with the joint of the supporting frame. The feeding box is fixedly connected to the bottom end of the supporting frame, a supporting column is fixedly arranged above one side of the feeding box, a screen is embedded in the mounting frame, springs are fixedly arrangedat the four corners of the mounting frame, a vibration generator is arranged at one end of each spring, a collecting box is arranged on one side of the mounting frame, and a connecting block is fixedly arranged below the feeding box. By arranging the dust removing box, an air blower, an exhaust fan and an impurity collection box, in the dust removing box, hot air blown out of the air blower is used for drying and removing dust from tea leaves, blown-out impurities can enter the impurity collection box, the tea leaves can be dried through the method, fine impurities in the tea leaves can be rapidly and efficiently screened out, and the quality of the tea leaves is improved.

The invention discloses a disassembling line of a waste television shell body. The disassembling line comprises a part conveying line and a material conveying line, wherein a material conveying line is arranged at the upper end of the part conveying line, dust collecting operation tables are arranged at the upper end of the material conveying line and the lower end of the material conveying line,and a sorting and conveying line is arranged at the upper end of the dust collecting operation table on the upper side. According to the disassembling line of the waste television shell body, all steps involved in the disassembling process are distributed in different areas along the main disassembling line, and therefore the labor intensity of workers is reduced, meanwhile, the disassembling efficiency is greatly improved, the disassembly and sorting places can be kept clean, only transferring and centralized processing need to be carried out on the sorted materials, and the workload that inthe prior art, intermediate transferring needs to be carried out on the disassembled materials frequently is reduced; and meanwhile, the dust collecting operation tables are arranged, and therefore dust generated during working can be timely adsorbed, and the health of workers is not harmed.

The invention belongs to the technical field of electrical equipment, and particularly relates to an electrical equipment cleaning device which comprises a bearing mechanism, a dust collecting mechanism and dust scraping mechanisms, the rear portion of the bearing mechanism is connected with the dust collecting mechanism through bolts, and the dust scraping mechanisms are installed on the two sides of the dust collecting mechanism. And the cleaning mechanism is used for blowing air and a cleaning agent into the electrical equipment. According to the electrical equipment cleaning device, through the arrangement of the closed rolling shaft, the upper closed belt and the exterior of the electrical equipment can be magnetically attracted and closed, so that the cleaning area is closed, and the influence on the external environment during cleaning is avoided; by means of the arrangement of the control box, whether a flash-point-free cleaning agent is blown in or not can be switched through the switching button, and then close soot blowing and cleaning can be achieved; and under the action of an electric telescopic nozzle, the spraying position of the non-flash-point cleaning agent can be controlled according to the positions of different cleaning areas.

The invention discloses a temperature-controllable feed storage bin, which comprises a storage box body, and a partition is arranged in the storage box body, and the partition board divides the storage box body into two identical boxes up and down, each box body starts from the left There are several hourglass-shaped storage chambers in sequence from the right, the storage box can rotate around its own horizontal axis, and the two ends of the storage box are connected with brackets; the narrowest part of the hourglass-shaped storage chamber is in the middle The distance between the cavity walls is 5-10cm, and the top and bottom surfaces of the material storage cavity are provided with toggle pieces, and the toggle pieces can be turned left and right. In the feed storage bin of the present invention, by rotating the storage box, the material can be continuously moved and turned over in the hourglass-shaped storage cavity during storage, so that the moisture in the material can be discharged during the turning, and the accumulation in the material can be avoided. It can cause fermentation inside, improve the preservation quality of materials, and avoid economic losses.

The invention relates to the field of highway traffic equipment, in particular to a guardrail with compound functions of vibration reduction and disaster prevention. The guardrail comprises an uprightcolumn arranged on a highway, wherein the upright column is connected with a guardrail plate through an energy dissipation device. The guardrail with the compound functions of vibration reduction anddisaster prevention is reasonable in design. On the basis of ensuring the functions of an existing conventional expressway guardrail, the guardrail can reduce the destructive force in the event of acollision, and prevent a vehicle body from bouncing onto other lanes at the same time to avoid a second traffic accident.

The invention discloses a water-cooled and heat-dissipating power box with weakened resonance. The structure includes a box body, heat-radiating leaves, heat-dissipating pipes, a safety door and an anti-resonance device. Beneficial effects: the present invention uses the anti-rust structure provided to timely absorb the water droplets splashed by the water-cooled radiator during operation and heat dissipation, and conduct evaporation treatment under the action of the heat generated by the heating ring, so as to avoid the water droplets from making the absorbent cotton It is saturated or overflowing, thus generating water vapor and causing other parts inside the chassis to malfunction due to moisture. This invention utilizes the shock absorbing mechanism provided to deal with the resonance generated during water cooling and heat dissipation, and the interaction between the concave bag and the convex air bag Effectively reduce noise, so as to avoid a large degree of deformation and dynamic stress on the structure of the chassis caused by the resonance.