1962results about How to "Guaranteed stiffness" patented technology

Disclosed is an automatic sorting system for household refuse. The system comprises a refuse target identification unit, a refuse sorting control unit, a mechanical arm and a sampling camera which is mounted at the fixed position of a conveying belt for conveying household refuse; the sampling camera shoots the household refuse on the conveying belt in real time and transmits obtained optical images to the refuse target identification unit; the refuse target identification unit receives the optical images in real time and displays the images, according to the characteristics of presorted target refuse, the optical images are treated, targets in the images are identified, and target posture information frames are obtained, and are input into the refuse sorting control unit; and the refuse sorting control unit judges whether a target enters the working section of the leisure mechanical arm or not according to the input target posture information frames and the opposite position of the mechanical arm and the conveying belt, the posture information of the target entering the working section of the mechanical arm is converted into a mechanical arm coordinate system and sent to the corresponding mechanical arm, and the corresponding mechanical arm is controlled to grab the corresponding target.

The invention discloses a double-finger double-driving translation clamping type flexible grip and a control method. The double-finger double-driving translation clamping type flexible grip comprises double servo motor systems, double motor end synchronous pulleys, double positioning sliding guide rail systems, double ball screw systems, double screw synchronous pulleys, double finger paws, a U-shaped main rack of the grip and a main rack cover plate, wherein the coordinating fetching action of two paws is realized by the control on two servo motors. A fetching method is characterized in that the double motors are used as power, double fingers are respectively fixedly arranged on two screw guide rail synchronous switching modules, through the rotation of two synchronous toothed belts between the double motor end synchronous pulleys and the ends of the double screw end synchronous pulleys, the rotation of the motor is converted into linear motion by a screw, so that the double fingers are translated respectively along two positioning sliding guide rails, and the translation switching on and off of the double paws along double guide rail surfaces can be realized. Due to the fact that the device is used for independently driving the corresponding paws to move by the double motors, so that the double fingers can more flexibly move, and different fetching speeds can be set for the double fingers, and the position precision is high.

The invention relates to a modularizing self-adaptation adjusting clamp used in the automobile welding, comprising a based station(1), a clamping mechanism(100) fixed on the based station(1) , an independent principal positioning mechanism(200), and an online real-time detecting and self-adaptation adjusting device(300). The online real-time detecting and self-adaptation adjusting device (300) is composed of a stepping motor (305), a slider (308), a straight-line guiding rail (309) and a transmission device. The transmission device, which is driven by the stepping motor (305), pushes a pushing rod (301) and the slider to slide along the straight-line guiding rail (309). The invention is more flexible and is convenient for the connection and combination of every component by means of modularized, standardized and serialized clamp elements, can be adapted to various work within a certain range and type, can effectively reduce the manufacturing cost, effectively controls the precision of the key points of workpieces and improves the welding quality and efficiency.

The invention discloses a controlled degradation type full-biodegrade agricultural mulching film, belonging to the technical field of agricultural mulching films. The full-biodegrade agricultural mulching film comprises the following raw materials by weight percent: 0.5%-50% of a processing aid A, 0.1%-0.5% of a processing aid B, 2%-10% of a functional aid A, 0.3%-2% of a functional aid B, 0.1%-5% of a functional aid C and the balance of full-biodegrade polyester. The full-biodegrade agricultural mulching film is reasonable in design, and the stiffness of the mulching film is kept by compounding flexible full-biodegrade resin with rigid full-biodegradable resin; good physical performance of the mulching film is ensured by reasonably combining various aids with full-biodegrade polyester; in addition, the mulching film does not contain non-biodegradable resin, is good in comprehensive performance, can meet the requirements on the degradation time caused by crops, and cannot affect subsequent farm operation after being degraded.

The invention relates to a flexible supporting mechanism for a reflector of a spatial optical remote sensor. The supporting mechanism comprises a reflector frame, and a plurality of external ring bosses B that are circumferentially and uniformly distributed and connected with an external ring of the reflector frame; wherein the remote sensor is connected with the reflector frame through the external ring bosses B; radial flexible ring knots and axial flexible ring knots are arranged on the external ring bosses; each radial flexible ring knot comprises two radial flexible knots; each axial flexible ring knot comprises two axial flexible knots; the radial flexible knots can offset a radial force suffered by the reflector through elastic deformation; and the axial flexible knots can offset an axial force suffered by the reflector through the elastic deformation. With the adoption of the flexible supporting mechanism for the reflector of the spatial optical remote sensor, effects of stress and deformation of a remote sensor body on the reflector can be effectively eliminated; the difficulty of installing and adjusting of the reflector is reduced; the rigidity of the mechanism is ensured, effects of environmental factors such as temperature fluctuation and gravity on a surface shape of the reflector can be effectively reduced; and the supporting mechanism has the advantages that the supporting mechanism is high in rigidity, good in temperature adaptability, and easy to process and assemble.

The preparation method of load-type photocatalytic cleaning net block includes the following steps: adopting active carbon as adsorbing agent, high-effective composite catalyst as photocatalyst and toumalinite as auxiliary material, mechanically mixing them to prepare multifunctional high-effective photocatalyst, then adopting water soluble latex as adhesive, mixing them, dispersing to obtain the stable suspension slurry, finally, adopting spray-coating or immersion-coating process to make the catalyst coating layer by uniformly adhered on the catalyst load carrier so as to obtain the load type photocatalytic cleaning net block which can degrade the organic pollutants of formaldehyde, benzene and ammonia.

The invention relates to a modular patient support system for use with radiotherapy treatments comprising a basic portion to be fixedly mounted and an exchangeable radiotransparent modular portion, said portion to be fixedly mounted being provided with a radiotransparent supporting part intended for supporting an exchangeable modular portion and means being provided for exactly positioning said modular portion in relation to said basic portion and coupling it to said basic portion.

The invention relates to a plane orientating system with large stroke, high speed nanometer stage precision and macro / micro dual driven. The X-shaft flexible hinge is fixed between the X-shaft micro moving platform 19 and X-shaft macro moving platform 16; the X-shaft piezo-electric ceramic 18 is posited inside the X-shaft micro moving platform 19; the cushioning hinge 29 is fixed between the inner guide 28 and the outer guide 30; one end of Y-shaft piezo-electric ceramic 24 is connected with Y-shaft micro moving platform 23; two bearings 34 are separately rotating connected with inner guide 18 and outer guide 30 of the Y-shaft macro / micro moving platform 8. The working rage is 25mmX25mm; the resolution is 10nm; the repetition orientating precision is 20nm; the maxim speeds of X-shaft and Y-shaft are separately at 50m / s2 and 100m / s2.

The invention relates to high-temperature-resistant heat-insulation paint and a preparation method thereof and belongs to the technical field of materials. The paint is used for heat-insulation protection of spacecrafts. The paint comprises, by weight, 25-35 parts of epoxide resin modified organic silicon resin containing nano particles, 10-20 parts of polybenzimidazole, 5-10 parts of high-temperature-resistant inorganic nonmetal compounds, 20-30 parts of high-temperature-resistant fillers, 1-3 parts of curing agents and 5-27 parts of solvents. The paint is high-temperature resistant, low in thermal conduction, high in shock resistance, low in density, good in bonding capacity, good in comprehensive performance index and capable of guaranteeing strength and rigidity of structural materials under the high temperature condition and meeting harsh requirements of aviation and space fields.

The invention relates to a tunnel-assembled lining structure and a tunnel across a large-scale active fault zone in a strong earthquake zone, and relates to the field of transportation infrastructureconstruction. The structure comprises an initial support layer, a spray film waterproof layer, an assembly type concrete-filled steel tube lining layer and a flexible joint; the assembly type concrete-filled steel tube lining layer is provided with a plurality of concrete-filled steel tube lining sections, each section is provided with a first steel tube sheet, a second steel tube sheet and a third steel tube sheet which are arranged from outside to inside, a first lining layer is arranged between the first steel tube sheet and the second steel tube sheet, and a second lining layer is arrangedbetween the second steel tube sheet and the third steel tube sheet. The first lining layer includes a plurality of hollow steel tubes arranged at intervals and lightweight foam concrete for filling gaps, the second lining layer comprises high compressibility concrete, and the lining sections are connected through the steel plate spring type flexible joint. The structural stability under dislocation and strong earthquakes can be ensured, and the tunnel-assembled lining structure has functions of quick installation, replacement and quick repair; the principle of stiffness matching is fully considered in the structure, and multiple measures are combined to 'lead the earthquake'.

The invention discloses a two-plate type mould clamping mechanism and in particular relates to an isometric replaceable four-oil cylinder line-lock two-plate type mould clamping mechanism applicable to an injection moulding machine. The mould clamping mechanism mainly comprises a movable template, a fixed template, a tension rod, a mould regulation device, a jacking mechanism, a mould moving oil cylinder, internal circulation mould locking oil cylinders, ordinary mould locking oil cylinders and a displacement sensor, wherein the number of the internal circulation mould locking oil cylinders and the number of the ordinary mould locking oil cylinders are two respectively; the internal circulation mould locking oil cylinders and the ordinary mould locking oil cylinders are diagonally and symmetrically arranged; the oil return sides of ordinary mould locking oil cylinders are communicated with air; the ordinary mould locking oil cylinders can accommodate the displacement sensor to control the movement of a template and the relative position of the template; and a volume regulation sleeve is arranged on the tension rod to guarantee that the volume change of the oil return sides of the internal circulation mould locking oil cylinders is equal to the sum of the volume change of the mould locking sides of the internal circulation mould locking oil cylinders and the volume change of the mould locking sides of the ordinary mould locking oil cylinders in a mould moving process. The mould clamping mechanism can meet the requirements of the injection moulding machines of various specifications, saves material and energy, reduces the processing difficulty and guarantees the stable performance.

The invention discloses a micro-embedded self-lubricating texture on the surfaces of a gear and a cam and a preparation method thereof. The preparation method comprises the following steps of: performing micro texture processing on the surfaces of the gear and the cam by an Nd: YAG laser processing technology; and embedding a solid lubricant into the micro texture on the surfaces of the gear and the cam by a molding bonding technology of a self-lubricating composite material. The self-lubricating composite material comprises the following formula components in percentage by mass: 15 to 85 percent of polyimide (PI), 0 to 85 percent of polytetrafluoroethylene (PTFE), 10 to 40 percent of MoS2, 0 to 15 percent of WS2, 0 to 16 percent of graphite fluoride, 5 to 15 percent of graphite, 0 to 12 percent of PbO, 0 to 6 percent of antimony trioxide, 0 to 10 percent of CaF2 or BaF2, 0 to 15 percent of hexagonal boron nitride, 0 to 15 percent of nano lubricant and 0 to 5 percent of additive. According to the micro-embedded self-lubricating texture, the self-lubricating texture is subjected to micro embedding on the surfaces of the gear and the cam to ensure that the solid lubricant on the friction surface is stably supplied and uniformly coated, so that the lubrication and anti-wear properties of friction pairs such as the gear and the cam under complicated and harsh operating conditions are improved.

The invention provides an adjustable leveling guide rail. The adjustable leveling guide rail comprises a guide rail beam and a plurality of supporting pieces, wherein each supporting piece comprises a screw rod and a nut; the screw rod is connected with the guide rail beam through the nut; the end part of the screw rod is provided with a fixing block which is hexagonal, tetragonal or triangular; the fixing block is connected with the screw rod in an integral molding mode or the fixing block is detachably connected with the screw rod; and the supporting piece also comprises a positioning piece connected with the screw rod in a fitting mode. The invention also provides a leveling method for realizing the leveling guide rail, namely, the levelness of the leveling guide rail is adjusted by rotating a leveling nut and a positioning nut. In a construction process, instant leveling is realized by clamping the fixing block, fixing the screw rod and adjusting the levelness of the guide rail by screwing the positioning nut and the adjusting nut respectively. The adjustable leveling guide rail has high leveling accuracy, can realize instant leveling in the construction process and has the advantages of low cost, convenient detachment, easy construction, clean environment, green construction and the like.

The invention discloses an articulated dump truck chassis. The front suspension is composed of front U shape frame, vertical telescopic elastic component, front cross tie. The middle of the closing end of the front U shape frame is ball-pivot coupled with the front frame. The two biforked ends of the front U shape frame are respectively connected with the two sides of the front vehicle bridge. Two ends of the elastic component is connected between the top of the two sides of the front vehicle bridge and the bottom of the front frame. The two ends of the transversal front cross tie are respectively pivoted between the front frame of the two sides of the chassis and front vehicle bridge. The back suspension is composed of weigh beam, middle U shape from connected between the middle vehicle bridge and back frame, back U shape from connected between the back vehicle bridge and back frame, middle cross tie and back cross tie. The invention has simple structure, better maneuvering characteristics, and can prevent the frame from torsional deforming. The invention not only ensures the whole rigidity of the articulated dump truck, but also prevents the articulated dump truck from distortional deformation on the rough ground, increases maneuvering characteristics, especially for rough ground.

The invention provides a space six-degrees-of-freedom mechanism used for a hypersonic wind tunnel multi-body separation test. The mechanism comprises Z, X and Y three degrees of freedom straight-line motion mechanisms and [beta], [alpha] and [gamma] three degrees of freedom angular displacement motion mechanisms. The six-degrees-of-freedom are realized layer by layer and are connected step by step, and in terms of structure, embedment integration is achieved by a box stacking mode. A Z-direction mechanism, an X-direction mechanism and a [beta] mechanism are sequentially overlapped from bottom to top, and a Y-direction mechanism and a [alpha] mechanism are in embedded connection from outside to inside. A [gamma] mechanism is fixedly connected with the [alpha] mechanism through a bent blade, and is individually arranged in a wind tunnel flow field. Each of the Z-direction mechanism, the X-direction mechanism and the Y-direction mechanism adopts two driving assemblies in symmetric arrangement, so that the power and the size of a driving motor are effectively reduced, and the overall stability of the mechanism is improved. The [beta] mechanism and the [alpha] mechanism adopt line-to-arc mechanisms for implementation, so that overlapping of traditional three degrees of freedom rotation pairs is prevented, and the mechanism cantilever length is shortened. The structure is compact, the rigidity is good, andsix-degrees-of-freedom movement of high speed, high precision and high bearing capacity is achieved.

The invention relates to a converse construction process for the middle-high steel structure building, belonging to the steel structure system construction field and aiming at solving the problems that the construction surfaces are less, the construction efficiency is low, the construction period is long and the manufacturing of the steel structure components can not meet the integral mounting quality standard requirements because the steel floorslabs and the steel structure frameworks are constructed synchronously during the construction of the prior steel structure building. The converse construction process for the middle-high steel structure building comprises the following steps: refining and enlarging the connection nodes of the steel structure frameworks; processing and assembling the steel structure components according to the enlarged construction drawing; transporting and stacking the steel structure components; mounting the steel structure frameworks; and moungin the steel floorslabs. Because the converse construction process of mouting the main structures of all the steel structure frameworks before the mouting the steel floorslabs is adopted, the steel structure frameworks and the steel floorslabs can be constructed on the same plane and can be constructed in a vertical and cross way without mutual influence, the construction speed can be accelerated, and the construction efficiency can be improved. The converse construction process is simple, convenient, economical, reasonable, safe and reliable, ensures high mounting precision and can be applied to the construction of various middle-high steel structure buildings.

The invention discloses a double-plastics finned wound corrugated pipe and a method for manufacturing the same. A pipe wall of the double-plastics finned wound corrugated pipe is in the shape of a corrugated pipe which is squeezed and inflated and is integrated by means of spirally winding and hot melting, a bell socket and a spigot socket are respectively formed in two ends of the double-plastics finned wound corrugated pipe, cavities are arranged in corrugations of the pipe wall, strip-shaped plastic reinforcing ribs are arranged in the cavities and are perpendicular to the pipe wall, the outer edge of each plastic reinforcing rib is connected with a crest ring surface of the corresponding cavity by means of hot melting, and the inner edge of each plastic reinforcing rib is annularly connected with the other surface of the corresponding cavity by means of hot melting. The double-plastics finned wound corrugated pipe and the method have the advantages that the double-plastics finned wound corrugated pipe is good in ring stiffness and corrosion resistance and long in service life, and future maintenance investment is nearly zero; the bell socket and the spigot socket are connected with each other by means of electric hot melting, so that a system is good in airtight property, and forming machines implemented in a manufacturing procedure are simple and are low in investment and cost; the double-plastics finned wound corrugated pipe and the method can be widely applied to wall pipes with large and super-large apertures for drain and blowdown structures.

The invention aims at providing a cold metal transition welding method and a device thereof. The device consists of an MAG (Metal Active Gas) welding wire automatic feeding unit, a vibration wire feeding unit and an argon arc hot wire welding gun unit; the MAG welding wire automatic feeding unit is connected with the vibration wire feeding unit; the vibration wire feeding unit is connected with the argon arc hot wire welding gun unit through a hose; the argon arc hot wire welding gun unit comprises a straightener, an auxiliary arc welding gun and a main TIG (Tungsten Inert Gas) arc welding gun; and the auxiliary arc welding gun and the main TIG arc welding gun compose a heating source of the argon arc hot wire welding gun unit. The welding method comprises the following steps of: switching on a welding main circuit, and initiating a main TIG arc to heat a welding workpiece; and starting the MAG welding wire automatic feeding unit and a vibrating motor after the arcing of an auxiliary arc is stable. According to the cold metal transition welding method and the device thereof, the welding process is stable, the welding quality is even, the wire-feeding speed and the welding current are independently adjusted, the device is simple, and the cost is low. Based on the ordinary MAG welding wire feeding and arc wire-heating equipment, the vibration wire feeding unit is introduced, thewire heating manner is changed, thus, the cold metal transition welding is realized.

The invention relates to a variable-rigidity flexible mechanical arm module and a control method thereof. The variable-rigidity flexible mechanical arm module comprises two connecting plates (1) arranged on two sides, and a plurality of silica gel inflatable bags (2) are connected between the two connecting plates (1), wherein the plurality of silica gel inflatable bags (2) comprise variable stiffness silica gel inflatable bags which are used for generating an antagonistic effect and are arranged in the middle of the two connecting plates (1), and further comprise curved silica gel inflatablebags which are uniformly distributed around the two connecting plates (1) and are used for controlling the deformation shape; and each silica gel inflatable bag (2) is connected with an air pipe, theconnecting plates (1) are provided with pipeline passing holes (4) for allowing the air pipes to pass through, and the connecting plates (1) are further provided with connecting structures which can be in butt joint with a connecting plate of other flexible mechanical arm module so that the plurality of flexible mechanical arm modules can be connected in series. The variable-rigidity flexible mechanical arm module is simple in structure, convenient to assemble and flexible in movement; and the control method of the flexible mechanical arm module is efficient in work and the control precision is high.

The invention relates to a method for light weight of a 3D printing personalized external fixed supporting tool based on topology optimization. The method comprises the following steps of: step 1, scanning the limbs of an object to obtain data. Step 2, carrying out image segmentation and three-dimensional construction of the model to obtain a three-dimensional shell-like model of the surface of the limbs. Steps 3, carrying out surface modification treatment to construct a curved surface sheet of the outer contour of the limbs, and being imported to the computer-aided design software and beingtransformed to a shell-shaped curved surface model. Step 4, obtaining the initial finite element analysis result by using a finite element analysis software. Step 5, an iterative operation is designedon the basis of the optimization design of the sensitive algorithm. And finally, performing 3D printing to obtain the personalized external fixed supporting branch. The method combines the 3D printing technology to realize the optimized design and manufacture of the personalized external fixed supporting tool, not only can guarantee the effect of external fixation treatment of the supporting tool, meanwhile, the light weight design obviously improves the wearing comfort of the supporting tool, and can effectively reduce the medical cost.

Disclosed are a self-travelling diamond-shaped pin-connected truss-type form traveler structure and a form traveler travelling and constructing method. A form traveler is mainly composed of a main truss system, a horizontal connection system, an internal formwork system, an external formwork system, a bottom formwork platform system, a hanging system, an anchoring system and a travelling system. The main truss system is composed of two main trusses and horizontal bracings, and each single main truss is composed of a lower chord, an upper chord, a diagonal rod and a vertical rod which are connected into a whole via single-hole bolt pins through joint boxes. The two main trusses are connected by the spacing-adjustable horizontal bracings. A rear anchoring system is connected to the rear of the lower chords of the main trusses. The travelling system comprises a section rail located under the main trusses, a left-handed wheel, rollers, a travelling pushing jack and the like. The self-travelling diamond-shaped pin-connected truss-type form traveler structure is quick to install, the spacing between the main trusses and the positions of hanging rods can be adjusted according to the section forms of different box girders on the basis that load bearing is satisfied, the optimal stress state is formed, universality is high, turnover rate of the form traveler is increased greatly, project cost is saved, and economical benefit is obvious.

The present invention discloses a doctor blade system which utilizes a lightweight doctor blade chamber to apply ink to an inking roller. The doctor blade chamber is removably positioned on a support plate which is, in turn, carried by linear guides on pivotable end plates. A rigid box beam is also attached to the end plates and is spaced from the support plate. A plurality of membrane cylinders are mounted on the rigid box beam and engage a surface of the support plate opposite to the surface that supports the doctor blade chamber. Through the application of suitable force, the support plate and its supported doctor blade chamber can be moved, by sliding motion on the linear slides, into uniform engagement with the surface of the ink roller. The system uses pivotable end plates which are supported by exterior plates that are, in turn, pivotably supported by press side frames. The chamber doctor blade and its support plate and box beam can be moved into several different positions, with respect to the cooperating ink roller, to facilitate doctor blade chamber cleaning or replacement or ink roller replacement.

The invention relates to a machine jellyfish, in particular to a machine jellyfish driven by an embedded type cylindrical motor. The problem that an existing bionic jellyfish robot is limited in moving range, small in effective water spraying size and small in driving force and is not suitable for a complex water flow environment in nature is solved. A mechanical abdominal cavity end cover, a sleeve and a bottom disc base of the machine jellyfish are in sealing connection from top to bottom in sequence. A cylindrical traveling wave ultrasonic motor is arranged on the bottom disc base. A transmission cam is located in the middle of the cylindrical traveling wave ultrasonic motor. A plurality of piezoelectric ceramic pieces are evenly distributed on the outer cylinder wall of the cylindrical traveling wave ultrasonic motor. A plurality of rectangular bosses which are arrayed vertically are evenly distributed on the inner cylinder wall of the cylindrical traveling wave ultrasonic motor. The other end of each arm pushing force rod is connected with a multi-joint arm. Each arm pushing force rod and the sleeve are connected through a pushing force rod guiding flange. An auxiliary spring is arranged between each pushing force guiding flange and an arm pushing force rod close to one side of a double-idler-wheel part. The machine jellyfish is used for unmanned underwater carrying.

The invention discloses a high-toughness, anti-impact and high-flexibility epoxy pouring sealant. The high-toughness, anti-impact and high-flexibility epoxy pouring sealant is composed of a component A and a component B, wherein the component A is prepared from the following raw materials in parts by weight: 0 to 130 parts of toughening epoxy resin, 5 to 20 parts of bisphenol A type epoxy resin, 1 to 18 parts of an active diluent, 1 to 10 parts of a thixotropic agent and 160 to 320 parts of aluminum oxide; the component B is prepared from the following raw materials in parts by weight: 20 to 50 parts of a flexible curing agent, 25 to 50 parts of a hyperbranched curing agent and 1 to 5 parts of an accelerant; the mass ratio of the component A to the component B ranges from (10 to 1) to (20 to 1). According to a preparation method provided by the invention, the materials are prepared and mixed according to formulas of the component A and the component B respectively. The epoxy resin provided by the invention not only has rubber flexibility, but also has excellent heat-resisting performance and rigidity.

The invention provides a pre-stress steel-concrete tower cylinder for a wind turbine generator. The pre-stress steel-concrete tower cylinder comprises a top steel tower cylinder body, a concrete towercylinder body and a bottom disc-shaped foundation, wherein the concrete tower cylinder is formed by vertically connecting multiple circular truncated cone-shaped prefabricated tower cylinder sections, and the segmented mode is horizontal segmentation; each tower cylinder section is formed by annularly connecting multiple arc-shaped prefabricated concrete sheets, and the fragment mode is a vertical fragment, and after the tower cylinder sections are spliced into a ring, a section-by-section hoisting mode is adopted for staggered joint installation; through an external pre-stress steel strand,the steel tower cylinder body, the concrete tower cylinder body and the bottom disc-shaped foundation are connected; and a concrete tower cylinder conversion section is arranged at the top of the concrete tower cylinder body, the concrete tower cylinder conversion section and the steel tower cylinder section are also connected through a bolt assembly, the wall thickness of the tower cylinder of the concrete tower cylinder conversion section is gradually reduced in a transition mode according to a certain ratio, the wall thickness of the top end surface is guaranteed to be obviously larger thanthe wall thickness of a cylinder body, and the external pre-stress steel strand penetrates through the concrete tower cylinder conversion section and then enters the inner space of the concrete towercylinder body. The pre-stress steel-concrete tower cylinder has the advantages that design is reasonable, construction is simple, transportation is convenient, connection is firm, manufacturing costis low, and construction can be carried out in batches.

The invention discloses a ceramic composite material bullet-proof chest board and a preparation method thereof. The ceramic composite material bullet-proof chest board is composed of a carbon fiber composite surface rigid layer, a ceramic composite material sheet combination layer, a bullet-proof fiber composite material body layer and a back elastic surface carbon fiber composite back-convex-proof layer. The ceramic composite material sheet combination layer is made of special fiber reinforced ceramic matrix materials and is of a needling insertion type combined structure or a three-dimensional crazing-prevention framework structure; a composite cementing and micropore riveting combined technology is adopted between the ceramic composite material layer and the bullet-proof body layer; finally, the ceramic composite material sheet combination layer and the bullet-proof fiber composite material body layer are wrapped in a rigid structure composed of the carbon fiber composite surface rigid layer and the back-convex-proof layer to form a whole. The ceramic composite material bullet-proof chest board has various advantages of being light, low in back convex, stable in high and low temperature structure, long in service life and the like. Meanwhile, the problem that a seam bullet-proof characteristic in a traditional splicing structure of ceramic sheets is poor is effectively avoided, and the ceramic composite material bullet-proof chest board has the overall characteristics of multiple bullet-proof materials.

The invention discloses a buffer and walking integrated landing device. Several buffer and walking integrated mechanisms are installed on the side wall of the landing device, and each buffer and walking integrated mechanism includes a body connecting plate assembly, a mechanical leg assembly, a buffering and driving integrated primary vibration reducer, buffering and driving integrated auxiliary vibration reducers, a knee joint locking device and a foot pad. Each body connecting plate assembly has the degree of freedom on medial rotation and lateral rotation; each mechanical leg assembly has the degree of freedom on the external swinging, retraction, anteflection and backward extension of hip joints, the stretching and bending of knee joints and the like; each buffering and driving integrated primary vibration reducer, each left buffering and driving integrated auxiliary vibration reducer, and each right buffering and driving integrated auxiliary vibration reducer achieve buffering or driving between the corresponding mechanical leg assembly and the corresponding body connecting plate assembly; the knee joint locking devices achieve flexible movement. The buffer and walking integrated landing device makes up for the shortcomings of a current movable landing device in the aspects of movement flexibility, use convenience and the like, and is extremely excellent in landing device body posture control capability and obstacle surmounting capability in the movement process.

A drawing die comprises an upper die and a lower die. The upper die has a forming surface used for forming parts. The lower die comprises a lower die seat, a die cavity fixed on the lower die seat and an edge pressing ring capable of sliding corresponding to the die cavity. The die cavity is provided with a die cavity surface corresponding to the forming surface. The lower die is provided with a fitting through hole passing the die cavity surface and a lower moving block capable of sliding along the fitting through hole. The edge pressing ring is sequentially located at a first position, a second position and a third position in the process of machining parts. When the edge pressing ring is located at the first position, a blank is clamped between the edge pressing ring and the upper die and contacts with the lower moving block; when the edge pressing ring moves from the first position to the second position, the lower moving block presses against the blank and performs pre-drawing on the blank; when the edge pressing ring moves from the second position to the third position, the lower moving block moves downwards, the die cavity draws the blank formally. The lower moving block can support and hold the blank, and defects of wrinkling and insufficient stiffness caused by blank gravity when large-scale parts are stamped can be prevented.

The invention discloses a wind tunnel test device for separating a hood of a plane-symmetric hypersonic aircraft. The test device comprises a projectile body model supported by a tail supporting rod of a hypersonic wind tunnel upper mechanism and a cover body model supported by an abdomen of a hypersonic wind tunnel lower mechanism. In an initial state, the cover body model covers the head of theprojectile body model and is separated from the projectile body model without contact; in a test state, the cover body model and the projectile body model are separated and do relatively independent motion; the cover body model adopts a rod-type six-component balance to measure aerodynamic force of the cover body model, and spray pipes are symmetrically arranged on the left and right sides of thecover body model for spray pipe jet flow simulation; the projectile body model adopts a rod type six-component balance to measure the aerodynamic force of the projectile body model; the abdominal support is communicated with a pore plate pressure regulating device. The test device solves the key technical problems of two-stage model relative attitude, two-stage model separation distance adjustment, jet flow simulation, small-size balance design, model connection and the like, improves the jet flow stability of the jet pipe, and reduces the interference of abdominal support.

The invention provides a robot end execution protection mechanism with a one-way buffering function. The robot end execution protection mechanism comprises a clamping mechanism. The clamping mechanism is fixed with a pneumatic claw. The upper end of the pneumatic claw is mounted under a lower flange plate by a pneumatic claw flange. The two ends of the lower flange plate are fixedly provided with linear bearings and the inner working face of each linear bearing fits a guiding limiting shaft. The parts of the guiding limiting shafts which pass through the lower flange plate are connected by two locking nuts. Compression springs pass through the guiding limiting shafts. One end of each compression spring is fixed with the outer end face of the corresponding linear bearing and the other end of each compression spring is fixed by a spring sleeve which is mounted under an upper flange plate. The parts of the spring sleeves and the linear bearings, which are located above the lower flange plate, are used as guiding limiting mechanisms of the upper and the lower ends of the compression springs, so that the whole end execution protection mechanism is of a rigid structure in the normal working state by the spring pre-tightening force. The parts of the guiding limiting shafts which pass though the upper flange plate are locked and fixed by two upper locking nuts. The upper flange plate is fixed with a robot arm and the pneumatic claw can receive the gas on the robot arm, so that the clamping control to the clamping mechanism can be realized.