90results about How to "Reduce processing requirements" patented technology

The invention belongs to the technical field of cables, and particularly relates to a high-temperature-resistant metallurgical vehicle-mounted flexible cable and a preparation method thereof. According to the high-temperature-resistant cable material, polyimide, polyphenylene sulfide and polybenzimidazole are matched, so that the high-temperature-resistant cable material is endowed with extremely high high temperature resistance, can resist the high temperature of 300 DEG C, and is extremely suitable for cable materials for metallurgy. Then, the flexibility of the material is improved by adding a flexible polyether-ether-ketone / nano silicon dioxide compound, and the surface of nano silicon dioxide is treated, so that the loading rate of polyether-ether-ketone can be increased, the phase separation phenomenon of polyether-ether-ketone in a blend is prevented, and uniform dispersion is promoted. And finally, the prepared high-temperature-resistant metallurgical vehicle-mounted flexible cable material is used as a filler and a sheath of the cable material, so that the cable structure is reduced, the production difficulty of the cable is reduced, the production process is simplified, and the material and process requirements are reduced, thereby achieving the purposes of reducing the cost and improving the production efficiency to a certain extent.

The invention discloses a spring operating mechanism for a medium-voltage sulfur hexafluoride circuit breaker, and belongs to the technical field of circuit breakers, and the spring operating mechanism comprises a frame, an energy storage assembly, a main shaft assembly, a closing assembly, an energy storage indication assembly, a manual opening and closing assembly, an emergency opening assembly, a closing locking assembly and an interlocking assembly. According to the spring operating mechanism, closing and opening operation of the contact of the medium-voltage sulfur hexafluoride circuit breaker is achieved through rotation of the mechanism output connecting lever, the spring operating mechanism has the advantages of being integrated in design, high in reliability, low in machining requirement, easy to assemble, controllable in cost and high in response speed, the energy storage state is displayed through the energy storage indication assembly, and the operation efficiency is improved. Opening and closing states are displayed through the opening and closing indication board, and display is visual; moreover, the emergency opening operation is realized through the emergency opening assembly, the closing and locking operation is realized through the closing and locking assembly, and the interlocking operation is realized through the interlocking assembly, thereby improving the safety.

The invention belongs to the technical field of sealing, and particularly relates to a combined sealing piece, a manufacturing method thereof and a sealing structure. The combined sealing piece comprises a first supporting ring, a second supporting ring, a first graphite ring, a second graphite ring and an alloy ring. The first graphite ring and the second graphite ring are constructed to be capable of conducting sealing operation on the first sealing face and the second sealing face correspondingly, and the alloy ring is constructed to be capable of being melted in response to temperature rising, so that radial acting force on the first graphite ring and the second graphite ring is generated under axial extrusion of the first supporting ring and the second supporting ring; therefore, the sealing effect on the first sealing surface and the second sealing surface is enhanced. According to the combined sealing element, the related requirements for sealing in the high-temperature and high-pressure environment can be met, the combined sealing element can be further suitable for low-speed dynamic sealing occasions, and the combined sealing element has good application prospects in the technical field.

The invention belongs to the technical field of contact lenses, and provides a contact lens ink and a preparation method thereof, the product comprises the following preparation raw materials by mass: 30-40 parts of a hydrophilic monomer, 10-20 parts of an organosilicon monomer, 10-15 parts of a functional monomer, 5-15 parts of a solvent, 1-5 parts of an auxiliary agent, 1-2 parts of a chain transfer agent, 0.5-1 part of a cross-linking agent, 0.5-0.8 part of an initiator, 1-5 parts of a pigment, and 1-1.5 parts of triethylene diamine. The organic silicon monomer enables the contact lens to have a double-channel structure of a silicon channel and a water channel, and oxygen in the air can penetrate through the lens to be in contact with the cornea, so that the oxygen deficit condition of eyes wearing the contact lens is improved. Meanwhile, the added auxiliaries are meglumine and allyloxy hydroxypropyl sodium sulfonate, and hydroxyl and sulfonic acid groups have hydrophilicity, so that the stability of the ink is improved, the contact angle of the surface of a lens can be obviously reduced, the surface wetting degree is increased, and the problem of difficult wetting is solved.

The utility model provides an adjusting mechanism for a calendaring roller structure. The adjusting mechanism comprises a rack, a first fixing seat, a second fixing seat and a driving roller, wherein the first fixing seat and the second fixing seat are fixedly installed on the two sides of the top of the rack, and the driving roller is rotationally connected between the first fixing seat and the second fixing seat. According to the adjusting mechanism for the calendaring roller structure, a first sliding block and a second sliding block can be driven to move reversely along a sliding rail by rotating a two-way lead screw, and meanwhile a first sliding seat and a second sliding seat can be driven to move synchronously on the inner side of a rack through cooperation of a fixing pin and a supporting plate; the first sliding base and the second sliding base can drive the driven roller to move synchronously while moving, then the distance between the driven roller and the driving roller is adjusted, and by the adoption of the structure, synchronous movement of the two sides of the driven roller can be achieved only by installing a set of threaded transmission structures below the driven roller; the requirement for machining and mounting precision of transmission parts is relatively low, and cost and maintenance cost are reduced.

The invention provides a sectional type fan blade and a transportation method thereof. The sectional type fan blade comprises a blade root, the blade root is provided with a framework, and the framework is provided with a plurality of blade sections; the blade sections are connected with the framework through mounting pieces; the blade root is used for connecting a wind driven generator hub; a soft cushion is arranged at the joint of every two adjacent blade sections; the blade section is cylindrical, and the framework penetrates through the blade section. According to the sectional type fan blade, large transportation equipment does not need to be used during transportation, the road environment does not need to be changed during land transportation, the transportation efficiency is higher, the influence of the environment is smaller, and the transportation cost is lower; the fan blade framework and the fan blade are produced and machined in a sectional mode, the machining mode is simple, a large mold does not need to be used, and therefore the machining cost is greatly reduced.

This utility model relates to the field of medical equipment technology, and in particular to an animal vaccine injection booster device, comprising a first air chamber, a second air chamber, a piston assembly, and a gun body; the gun body has a first air chamber and a second air chamber, the first air chamber having a gas source inlet, a gas outlet, and a gas delivery outlet, the gas delivery outlet communicating with the second air chamber, and a control valve also being provided in the first air chamber; when the trigger of the gun body presses the control valve, the control valve blocks the connection between the gas delivery outlet and the gas outlet; when the trigger of the gun body is released, the control valve blocks the connection between the gas delivery outlet and the gas source inlet; the second air chamber has a piston assembly, the piston assembly including a piston and a firing pin, the firing pin being disposed on the piston, and an elastic element being provided between the piston and the firing pin output end of the second air chamber; the trigger is disposed on the grip part of the gun body, the grip part having a grip groove on the side near the trigger, and a thumb groove on the top side of the grip part away from the trigger. This utility model is easy to operate and has a good grip feel.

The invention discloses a method for synthesizing a cefvimicin mother nucleus by an enzymic method, which belongs to the technical field of medicine synthesis, and comprises two working sections: 1, removing a carboxyl protecting group from a double-protection mother nucleus Sm to obtain an aqueous solution of a salt of an intermediate A; and 2, removing an amino protecting group from the intermediate A by an enzymic method to obtain the cefvimicin mother nucleus. The process for preparing the cefvimicin mother nucleus is green and environment-friendly, does not have harsh conditions such as no water, no oxygen, ultralow temperature and the like, does not generate substances with strong corrosivity, is friendly to production equipment, is easy to recycle a waste solvent, and has low wastewater treatment requirements.

The invention relates to a wafer recovery method, a diffractive optical waveguide manufacturing method, and a diffractive optical waveguide. The wafer recycling method comprises the following steps that a diffraction optical waveguide to be recycled is provided, the diffraction optical waveguide to be recycled comprises a substrate wafer, a cut-off layer and a grating wafer which are arranged in a stacked mode, and the surface of the cut-off layer and / or the surface of the grating wafer have defects caused by etching; carrying out etching and / or chemical mechanical polishing on the defect surface of the diffraction optical waveguide to be recycled until the preset surface roughness is reached, so as to obtain a recycled wafer; the manufacturing method of the diffraction optical waveguide comprises the following steps of forming a thin film wafer on the surface of a cut-off layer of a receiving sheet, and carrying out etching treatment on the surface of the thin film wafer, and S3, before manufacturing is completed, if the cut-off layer and / or the surface of a grating wafer have defects caused by etching, preparing a recycled wafer according to the recycling method. According to the method, recycling of unqualified products is achieved, the production cost is reduced, the stability of the performance of the recycled products is improved, and the method is suitable for medium-batch and large-batch machining and manufacturing of the silicon carbide diffraction optical waveguides.

Disclosed is a method for synthesizing aluminum nitride by microgravity combustion, which uses Mg4Al3 or Mg 17 Al 12 powder as raw material, and performs combustion in a microgravity and nitrogen atmosphere, and then purifies the combustion product using hydrochloric acid to obtain AlN powder. The method is applicable to both small particles (1 μm in diameter) and large particles (500 μm in diameter), and has a short synthesis time, high purity of the obtained aluminum nitride, and the heat generated by combustion can be used to maintain the temperature of the synthesis chamber, thereby reducing energy consumption.

The invention provides a skeleton type detachable segmented fan blade and a processing method thereof, the skeleton type detachable segmented fan blade comprises a mounting seat, the mounting seat is provided with a skeleton, and the skeleton is provided with a plurality of blades; connecting frames are arranged in the blades, the framework is provided with guide rails, the connecting frames are matched with the guide rails, and the blades are connected with the framework through the connecting frames and the guide rails. The mounting base is used for connecting a wind driven generator hub. In the production process, a large mold does not need to be used, machining forming of the blade can be completed through a small mold, operation is simpler, and cost is lower; the sectional type detachable blades are adopted, when part of or a single blade is damaged, only the corresponding blade needs to be replaced, the whole fan blade does not need to be replaced, the replacement and maintenance cost is lower, and the replacement efficiency is higher.

The invention relates to a radiation meter dense feed source array directional diagram optimization method based on a generative adversarial network. The method comprises the following steps: constructing a training data set, a condition vector containing a target directional diagram performance index and a corresponding optimal amplitude-phase weight vector; designing a conditional generative adversarial network model; constructing a physical constraint loss function by embedding a differentiable electromagnetic calculation module; loading the constructed training data set, and training a complete generative adversarial network model based on a loss function embedded with a differentiable electromagnetic calculation module; and when the system antenna pattern obtained according to the amplitude-phase adjustment parameters output by the generative adversarial network model meets the antenna pattern evaluation index, completing dense feed source array antenna pattern optimization. According to the method, the target weight is dynamically adjusted and optimized on orbit, so that a single model can adapt to beam forming requirements in different observation scenes, and flexible switching of multiple task modes such as high-resolution detection and wide-range general survey is realized.

The invention provides a preparation method of a solid solution oxygen reinforced Ti15Zr alloy with an ultra-fine grain structure. The mechanical property of the material is synchronously improved through solid solution oxygen atom strengthening and ultra-fine grain structuring, on the basis, a fine grain structure is reserved through a vacuum heat treatment process, meanwhile, a deformed structure is eliminated, the plasticity of the material is recovered, the comprehensive performance of the Ti-Zr alloy is further improved, and the safety of the Ti-Zr alloy in the human body service process is met.

The utility model is suitable for the technical field of equipment installation, and provides a suspended ceiling installation frame which comprises a fixing structure, an installation structure, a rotary connecting piece, a connecting rod and an electric push rod. The mounting structure is rotationally connected with the fixing structure. The electric push rod drives the mounting structure to rotate relative to the fixing structure, so that the mounting structure is switched between the folding configuration and the unfolding configuration. In the process that the fixing structure rotates relative to the mounting structure, the first end of the connecting rod rotates relative to the mounting structure, and the second end of the connecting rod rotates in the sliding groove of the fixing structure and can slide along the sliding groove. Compared with an existing complex multi-connecting-rod structure arranged between a mounting structure and a fixing structure, the connecting rods are simple in structure and movement mode, the requirements for machining precision and movement matching degree are lowered, the problem that the mounting structure is prone to shaking or blocking when rotating relative to the fixing structure is solved, and the service life of the connecting rods is prolonged. And therefore, the stability and smoothness of the operation of the suspended ceiling mounting frame are improved.

The utility model relates to the technical field of valve, specifically relates to a ball valve seat device, and with the valve core device cooperation uses, valve seat device includes metal valve seat and valve seat hard material lining, in the switch process of valve, the valve seat sealing surface of metal valve seat is used for with the valve core sealing surface of metal valve core abuts, be equipped with valve seat hard material lining in metal valve seat for powder transmission, in powder transmission, especially under high pressure condition, need better wear resistance and higher pressure capacity, metal valve seat has higher pressure capacity, is not easy to break, the valve seat hard material lining that sets up in metal valve seat, has better wear resistance, and has relatively thick thickness, has improved the service life of valve seat device, simultaneously, the material use of valve seat hard material lining is less, and the processing requirement is not high, makes the cost of valve seat device greatly reduces.

The utility model discloses a kind of floating rack steering axle structures, belong to fork truck steering axle field. Including: slewing support, cylinder barrel assembly, floating rack assembly and support pinion shaft. Cylinder barrel assembly includes left cylinder barrel and right cylinder barrel, left cylinder barrel open end is fixedly inserted in the inside of slewing support left side interface, right cylinder barrel open end is fixedly inserted in the inside of slewing support right side interface;Floating rack assembly includes rack body, left piston and right piston, left piston is slidably embedded in left cylinder barrel, left piston is tightly attached to rack body left end, right piston is slidably embedded in right cylinder barrel, right piston is tightly attached to rack body right end;The top gear ring of support pinion shaft is engaged with the transmission gear portion opened in the middle part of rack body. The utility model reduces cylinder barrel machining precision requirement, assembly efficiency is improved by more than 20%, compresses slewing support axial space 15%-20%, oil seal life is extended to 2 times of traditional structure.

The invention discloses a 3D printing porous medical titanium alloy and a preparation process thereof, and relates to the technical field of medical titanium alloys, and the preparation process comprises the following operation steps: S1, cleaning a 3D printing porous titanium alloy sample piece to obtain a 3D printing porous titanium alloy prefabricated piece; s2, primary micro-arc oxidation is conducted, specifically, the 3D printing porous titanium alloy prefabricated part is placed in electrolyte to be subjected to primary micro-arc oxidation, and a 3D printing porous titanium alloy prefabricated part A is obtained; s3, the 3D printing porous titanium alloy is subjected to acid treatment, and a 3D printing porous titanium alloy prefabricated part B is obtained; s4, secondary micro-arc oxidation is conducted, specifically, the 3D printing porous titanium alloy prefabricated part B is placed in electrolyte to be subjected to secondary micro-arc oxidation, and a 3D printing porous titanium alloy prefabricated part C is obtained; s5, the 3D printing porous titanium alloy prefabricated part C is cleaned; transferring into a fibroin solution, and taking out; and irradiating for 8-15 minutes under an ultraviolet lamp, cleaning and drying to obtain a finished product.

The invention provides a motor rotor assembly tool which comprises a guide rod assembly, the guide rod assembly comprises a core rod and a sleeve, the sleeve is arranged on the periphery of the core rod in a sleeving mode, the hardness of the core rod is larger than that of the sleeve, the guide rod assembly is of a cylinder structure, one axial end of the guide rod assembly can be connected with a rotor, and the other axial end of the guide rod assembly can be connected with the rotor. The other axial end of the guide rod assembly is inserted into a shaft hole in the motor shell so that the rotor can be guided and pulled into the shaft hole, and the shaft hole comprises a shaft hole of a stator and a shaft hole of a bearing. According to the invention, it can be ensured that the whole assembly is not greatly bent due to forced reasons and the like, and the guiding effect on the rotor is improved, so that the assembly centering effect on the motor rotor is improved, and the situation that the rotor deviates from the center position and scratches a bearing is prevented; the problems that the rotor cannot be centered, so that the rotor deviates from the central position, and the rotor is scratched with a bearing are solved.

The invention relates to the technical field of battery assembly, in particular to a battery film separating device and a separating method thereof. The film transfer mechanism is used for conveying the whole film to the output end of the film transfer mechanism; the glue distributing servo gripper mechanism and the lower glue distributing variable-pitch mechanism are of an up-down split structure, the glue distributing servo gripper mechanism is installed on the mechanical arm, the lower glue distributing variable-pitch mechanism is installed at the output end of the glue sheet operating mechanism, and the glue distributing servo gripper mechanism is located above the output end of the glue sheet operating mechanism. And the separated strip glue is adhered to the outer surface of the corresponding side edge of the battery pack through the glue separation servo gripper mechanism. Each strip of the whole film is separated according to the required distance; the glue distribution servo gripper mechanism is matched with the lower glue distribution variable pitch mechanism to directly distribute glue, then the glue distribution servo gripper mechanism directly grabs strip glue and finally adheres the strip glue to the outer surface of a single battery, the transfer step of the strip glue is reduced, the automatic glue cleaning mechanism conducts glue cleaning on a conveying belt, the working efficiency is improved, and the glue distribution stability is guaranteed.

This invention relates to the field of advanced semiconductor packaging and chiplet integration technology, specifically disclosing a heterogeneous die system-on-a-chip and its fabrication method. The method includes: S1: providing an adapter board, the top surface of which is provided with a first I / O pad, and forming a first metal interconnect region above the first I / O pad, or using the first I / O pad as the first metal interconnect region; S2: providing a chiplet, the top surface of which is provided with a second I / O pad, and fabricating a second metal interconnect region on the top surface of the chiplet. This invention achieves self-aligned interconnection of the metal interconnect regions between the chiplet and the adapter board by combining an open area on the top surface of the adapter board with selective deposition, eliminating the need for high-precision photolithography alignment and significantly reducing process complexity. Simultaneously, this method supports multi-layer PAD expansion, multi-array parallel interconnection, wafer-level batch integration, and various layout methods, achieving high-density, low-latency, and high-reliability chiplet interconnection.

This utility model provides a prefabricated metal octagonal caisson ceiling, relating to the field of ancient architecture technology. It includes a square well body, an octagonal well body, a circular well, and corner brackets. The square well body has an octagonal well body inside, which is composed of eight prefabricated well blocks. Each of the eight prefabricated well blocks is composed of a first connecting unit, a first horizontal unit, a second connecting unit, a first continuous curved surface unit, a third connecting unit, a second horizontal unit, a fourth connecting unit, a second continuous curved surface unit, and a fifth connecting unit. By setting each of the eight prefabricated well blocks of the octagonal well body to consist of the first connecting unit, a first horizontal unit, a second connecting unit, a first continuous curved surface unit, a third connecting unit, a second horizontal unit, a fourth connecting unit, a second continuous curved surface unit, and a fifth connecting unit, the prefabricated octagonal well body can be assembled using a positive stacking method, which greatly reduces the installation difficulty.

The invention relates to a pressure sensor capable of preventing overpressure in packaging. The top end surface of a shell is provided with a pressing rivet flange; a medium inflow pipe is arranged at the bottom of the shell; a containing groove communicated with the medium inflow pipe is formed in the top end face of the shell in a downward sunken mode, and an abutting area is arranged on the top end face of the shell and located on the outer side of the periphery of the containing groove; the pressure sensitive element assembly is positioned in the accommodating groove; the pressing ring at the bottom of the end button assembly is riveted with the pressing rivet turnup and abuts against the abutting area, through the arrangement, after the end button assembly and the shell are riveted, the bottom of the end button assembly abuts against the abutting area, in the press fitting process, the bottom of the end button assembly cannot make contact with the pressure sensitive element assembly in the containing groove, the risk of overpressure in press fitting is avoided, and the service life of the end button assembly is prolonged. And the requirement for the press-fitting and riveting process is low, and the production efficiency is improved to a certain extent. The vertical limiting column and the elastic column are additionally arranged on the pressure sensitive element assembly for limiting, or the pressure sensitive element assembly is fixed through an adhesive, so that gaps are avoided, and medium flowing is prevented.

The utility model discloses a battery cell assembly, a battery and electric equipment. The battery cell assembly comprises a battery cell and an outer wrapping film, each outer surface of the battery cell is covered with the outer wrapping film, the outer wrapping film is provided with a windowing hole, and the windowing hole penetrates through the outer wrapping film in the thickness direction of the outer wrapping film. According to the battery core assembly disclosed by the utility model, the requirements on the coating process and the position degree of the outer coating film without the window hole on the surface of the battery core can be reduced, so that the requirements on the coating process and the position degree of the outer coating film are reduced, and the window hole can be better covered with the adhesive, and the risk of insulation failure of the battery core is further reduced.

The application provides a sodium ion battery positive electrode material and a preparation method and application thereof, the sodium ion battery positive electrode material comprises an active material and a hydrophobic coating layer, and a coating source of the hydrophobic coating layer comprises a siloxane-based compound; the siloxane-based compound is used as the coating source of the hydrophobic coating layer, a compound containing -Si-O-Na is generated on the surface of the active material, the hydrophobic property and the environmental stability can be ensured at the same time, and the sodium ion battery obtained has high ion conduction capacity, so that the sodium ion battery has good cycle performance; meanwhile, the application is coated by using a molecular self-assembly method, the thickness does not change due to the change of the morphology of the material, the process requirement is low, and the cost is low.

The invention provides a microscope objective turntable and a microscope, and the microscope objective turntable comprises a support, a rotating sleeve which is rotatably connected to the support, a turntable which is fixed on the rotating sleeve, and a supporting member which is respectively connected to the support and the turntable. The supporting piece comprises a first inner ring fixed to the support, a first outer ring which is fixed to the rotating disc and forms a first roller path with the first inner ring in an enclosing mode, and a plurality of first balls contained in the first roller path, and further comprises an annular retainer contained in the first roller path. The annular retainer is provided with a plurality of positioning holes distributed in the circumferential direction of the first roller path at intervals, and the first balls are assembled in the positioning holes in a one-to-one correspondence mode. The supporting piece is a four-point contact bearing, the precision and rigidity are higher, the precision of the microscope objective table can be higher, and the finished product performance of the microscope objective table is improved.

The present invention relates to the technical field of cutter disc processing, and discloses a clamping and positioning device for producing cutter discs of shield machines, including a workbench, a rotating assembly is provided at one end of the top surface of the workbench, a pushing assembly is provided at the other end, a jacking assembly is provided on the workbench between the rotating assembly and the pushing assembly, a clamping assembly for positioning the center disc is provided on the cylinder, a material holding assembly for placing a plurality of side blocks at intervals is provided on the jacking assembly, a limiting assembly for blocking the side blocks is provided on the workbench, the limiting assembly includes a limiting rod 1 and a limiting rod 2 fixedly arranged on the workbench, and a limiting rod 3 and a limiting rod 4 sliding up and down on the workbench, and the upward sliding of the limiting rod 4 and the jacking assembly is synchronously performed and driven by the same power source. The present invention can conveniently and quickly perform effective abutment positioning between each end of the center disc and each side block, which not only reduces the requirements of the processing procedures, but also increases the production efficiency of the enterprise.

The utility model discloses a square rectangular steel pipe column node structure of a building steel structure, which comprises a pipe column body, a pipe wall plate block, inner partition plates and a process steel liner, a hole is formed in the pipe wall plate block cut from one pipe surface in a pipe column body node area, two inner partition plates are arranged at the transverse edge of an inner cavity of the hole, and after the inner partition plates are welded with the inner wall of a pipe, the process steel liner is welded with the inner wall of the pipe. And the pipe wall plate is reset to be welded with the inner partition plate and the pipe orifice wall. The utility model provides a feasible structure for production and processing for enabling the beam-column connection to meet the stress requirement under the condition that the steel pipe is not cut off at the node of the square rectangular steel pipe column, can effectively reduce the manufacturing process links, improve the production efficiency and reduce the production cost, and has the advantages of simple structure and quickness in manufacturing.

The invention belongs to the technical field of construction, and particularly provides an overwater suspended bearing platform pile head hoop system and a construction method thereof.The construction method includes the steps that S1, a point needing pile sinking is positioned, and pile sinking is carried out on the positioned pile sinking point through hammering; s2, a hoop is installed on the pipe pile subjected to pile sinking; s3, steel beams are installed on the hoops and the pipe piles, formworks are installed on the steel beams, and steel bars are bound on the steel beams; s4, concrete pouring; and S5, after the concrete strength is qualified, the formwork is removed, and construction is completed. The problems that when a suspended platform is built on the water surface of an existing pit pond, foundation excavation, replacement and filling and concrete foundation pouring are needed, the cost is high, the construction period is long, many potential safety hazards exist, the environment is greatly affected, and breeding operation cannot be conducted during construction are solved. Construction can be carried out in an overwater environment, a stable formwork system is built under the condition that no solid ground support exists, pouring construction of a concrete platform is achieved, and meanwhile the requirement for underwater foundation treatment and the construction difficulty are reduced.

The invention discloses a protective pad for physical training, which comprises an upper protective pad, an inflatable pad and a lower protective pad, both the upper protective pad and the lower protective pad are made of foam materials, and the inflatable pad is arranged between the upper protective pad and the lower protective pad; the inflatable cushion comprises an upper air cushion and a lower air cushion, the upper air cushion comprises an upper base material, a plurality of upper air bags are arranged on the lower surface of the upper base material at intervals, upper air channels are arranged among the upper air bags, and any upper air bag is provided with an upper inflatable tube; the lower air cushion comprises a lower base material, a plurality of lower air bags are arranged on the upper surface of the lower base material at intervals, lower air channels are arranged among the lower air bags, any lower air bag is provided with a lower inflation pipe, and the lower air bags and the upper air bags are distributed in a staggered mode. The inflatable cushion is arranged to be of a plurality of air bag structures, so that the requirements of the inflatable cushion on materials and processes can be reduced, and the production cost is saved; the staggered air bags can not only improve the uniformity of the surface elasticity of the inflatable cushion, but also prevent the inflatable cushion from slipping, so that the stability of the inflatable cushion is ensured.

The invention discloses a buffer layer structure for silicon carbide stripping and a preparation method thereof. The preparation method comprises the following steps: forming a graphene layer on the surface of a substrate; forming a first silicon carbide buffer layer on the surface of the graphene layer under a first temperature condition; forming a second silicon carbide buffer layer on the first silicon carbide buffer layer under a second temperature condition; forming a third silicon carbide buffer layer on the second silicon carbide buffer layer under a third temperature condition; wherein the first temperature is smaller than the second temperature, the second temperature is smaller than the third temperature, and the graphene layer, the first silicon carbide buffer layer, the second silicon carbide buffer layer and the third silicon carbide buffer layer jointly form a buffer layer. According to the buffer layer structure for silicon carbide stripping and the preparation method of the buffer layer structure, through the arrangement of the buffer layer, the stripping difficulty of the substrate on which the silicon carbide epitaxial functional layer grows after being bonded with other substrates can be remarkably reduced, and the crystal quality of the epitaxial functional layer is not influenced in the stripping process.