199results about How to "Avoid concentrated stress" patented technology

The invention relates to the field of wind power generation, and discloses a wind power blade which comprises a blade body, a wind power generation assembly and a wind power generation assembly. The counterweight assembly is mounted in the hollow cavity of the blade body; the balance weight assembly is connected to the blade body through a first elastic bonding layer, and the first elastic bonding layer comprises bonding glue with the tensile modulus smaller than 2 GPa. The problems that stress concentration can be generated between a balance weight and a wind power blade, and then damage and even falling are caused are solved. The balance weight assembly is connected with the blade body through the first elastic bonding layer, the first elastic bonding layer comprises the bonding glue with the tensile modulus smaller than 2 GPa, when the wind power blade is stressed, deformation of the balance weight assembly and deformation of the blade body are isolated through the first elastic bonding layer, and the first elastic bonding layer has certain elastic deformation; stress concentration and stress accumulation between the balance weight assembly and the blade body are avoided, damage between the balance weight assembly and the blade body is reduced, and the risk that the balance weight assembly falls off is reduced.

The invention provides a hydraulic cylinder deep sea simulation test device and method.The hydraulic cylinder deep sea simulation test device comprises a cylinder barrel, cylinder covers are fixedly arranged at the two ends of the cylinder barrel, a supporting adjusting platform and a sliding supporting platform which are horizontally arranged are arranged in the cylinder barrel, a test hydraulic cylinder is fixed to the supporting adjusting platform, and a flat pressing barrel sliding in a sealed mode is arranged on the cylinder barrel at one end; the end of the flat pressing cylinder is connected with the end of a piston rod of the test hydraulic cylinder through a connecting assembly, and the bottom of the connecting assembly abuts against the sliding supporting platform to slide. The deep sea simulation test device not only can simulate a deep sea high-pressure environment more truly, but also can significantly reduce test errors, improve leakage detection capability, enhance reliability and durability of a system, improve safety, and provide comprehensive data recording and analysis support. Therefore, the test quality of the hydraulic cylinder product is greatly improved, and the performance and reliability of the hydraulic cylinder product in practical application are ensured.

The invention relates to a self-adaptive supporting structure for a high-crustal-stress soft rock large-deformation tunnel, which comprises a tunnel initial spraying leveling layer, a first-layer slide rail steel beam, a steel clamp, a second-layer slide rail steel beam, a supporting steel frame support and a measuring module, telescopic gaps are reserved between the sliding rail steel beams of all the sections, and the first layer of sliding rail steel beams are tightly attached to a tunnel initial spraying leveling layer and spliced with the second layer of sliding rail steel beams in a multi-section mode to form a ring. According to the self-adaptive supporting structure for the high-crustal-stress soft rock large-deformation tunnel, extrusion is locally reduced through the steel beams, meanwhile, energy generated during deformation is absorbed in a layered mode, the energy of the steel beams is greatly reduced from the first layer to the second layer, the supporting structure is protected, the supporting structure design concept of soft-first-rigid-second-soft-rock large-deformation is met, and the self-adaptive supporting structure is suitable for the large-deformation tunnel of the high-crustal-stress soft rock large-deformation tunnel of the high-crustal-stress soft rock large-deformation tunnel. The stress level of the supporting structure is reduced through layered stress release, and the ideal supporting effect is achieved.

The invention is suitable for the technical field of welding devices, and provides a welding device for curved surface framework machining, which comprises a regulation and control robot, an assembly frame, an assembly bottom frame, an assembly top frame, a rotary control mechanism, a fixing frame and a welding gun, and further comprises a touch adjustment mechanism, a visual identification module and a reversing mechanism. According to the using method of the welding device for machining the curved-surface framework, by means of the welding device for machining the curved-surface framework, the welding gun is matched with the regulation and control robot, the assembly frame, the rotary control mechanism, the fixing frame, the touch adjustment mechanism, the visual recognition module and the reversing mechanism; the welding device can continuously and uniformly weld the seam of the framework along the outer contour track of the framework in a circumferential rotation mode, it is ensured that the position and shape of a weld joint meet the welding requirement, a welding gun can flexibly adapt to welding of the straight or curved seam of the framework, meanwhile, the continuity and stability of welding operation are ensured, and the welding efficiency is improved. And stress concentration or structural weakness caused by non-uniform welding is avoided.

The invention discloses an intelligent control environment-friendly basin body machining process, and belongs to the technical field of machining and welding processes. Comprising the steps that S1, positioning is conducted, specifically, a clamping mechanism clamps a base material, and the position of the base material is adjusted; s2, pretreatment is conducted, specifically, a pretreatment mechanism conducts oil stain cleaning and welding face grinding on the base material; s3, preheating is conducted, specifically, the sensor assembly detects the thickness and the material of the base material, and a temperature control mechanism is regulated and controlled to preheat the welding area to the proper temperature; s4, welding is conducted, specifically, the control terminal instructs a welding mechanism to conduct welding treatment according to set welding parameters including the welding temperature, the welding speed and the welding pressure; and S5, heat preservation is conducted, specifically, the control terminal instructs a temperature control mechanism to conduct heat preservation treatment on the welding area according to the thickness of the base material and the material parameters. The large temperature change in the welding process is avoided, and the structural strength of a weldment is improved.

The invention belongs to the technical field of open caisson control, and discloses a tunneling and bottom sealing method for a super-large-section vertical shaft, a first tunneling machine is adopted for tunneling an outer ring area of the bottom of the shaft along a sliding rail, a second tunneling machine is adopted for rotatably tunneling an inner ring area around the central axis of a rotary disc, the tunneling range is effectively expanded, and the construction requirement of the super-large-section vertical shaft is met; wherein the ring beam is pre-embedded around the upper part of the inner wall of the blade foot to support the arrangement of the slide rail and ensure the stable operation of the first heading machine; the working radius of the central operation platform is adjusted through the telescopic second heading machine so as to adapt to heading areas of different sizes, and the supporting legs can be stably clamped to the ring beam to maintain the stability of the central operation platform; according to the area ratio of the inner ring area to the outer ring area, the tunneling speed of the first tunneling machine and the second tunneling machine is adjusted, and the excavation consistency is guaranteed; the brush arm machine slides along the sliding rail and drives the brush head to be attached to the side wall of the blade foot for cleaning, it is ensured that no impurity is attached to the side wall of the blade foot, and structural hidden dangers caused by local weakness of the back cover are avoided.

The invention relates to the technical field of motors, in particular to a magnetic self-centering motor assembling method which is applied to a motor and comprises the following steps: forming a rotor assembly; a rotor assembly is rotatably and preliminarily installed on a base through a rotating shaft assembly, an end cover is preliminarily installed on the base, a bearing chamber of the end cover supports an outer ring of a bearing on the rotating shaft assembly through a radial elastic supporting unit, and the radial elastic supporting unit allows the outer ring of the bearing to slightly and radially float; a driving current is applied to the stator assembly, so that the rotor assembly generates a rotation trend or rotates at a low speed, and the rotor assembly is driven to overcome the micro radial rigidity of the radial elastic supporting unit by utilizing the unbalanced magnetic pulling force of interaction between the rotor assembly and the stator assembly; and the rotation axis of the stator assembly is automatically adjusted to a position which tends to be coaxial with the central axis of the stator assembly. The method can actively compensate radial dimension chain errors and assembly deviations accumulated in the previous process.

The invention discloses a laser splicing welding joint for ultrahigh-strength hot-formed steel and a manufacturing method of the laser splicing welding joint, the welding joint comprises a base metal area and a melting area, and the base metal area and a welding line area are mainly composed of tempered martensite; the mass percent of the carbon content in the base metal area is not lower than 0.2%, and the mass percent of the average aluminum content in the weld joint area is not higher than 1.8%. The welding joint is manufactured through the following steps that a pair of high-strength steel workpieces is provided to be in butt joint to execute laser welding, and in the welding process, laser filler wire welding is adopted to obtain a preliminary welding seam; performing a quenching process on the primary welding seam to obtain a final welding seam; the quenching process comprises a heating and heat preservation stage and a cooling stage; the time for quickly transferring and cooling the welding part is t1, and the temperature of the welding part is T1; the cooling stage comprises a stage from T1 to the temperature T2 and a stage from T2 to the room temperature through slow cooling, the duration time of the rapid cooling stage is t2, and the duration time of the stage from slow cooling to the room temperature is t3.

The invention discloses calendaring equipment for non-ferrous metal alloy, which belongs to the field of calendaring and comprises two side plates and a calendaring unit connected with the side plates, and a longitudinal stress applying unit is connected between the two side plates. The longitudinal stress applying unit comprises a second support fixedly connected to one side of one side plate, two second gears rotationally connected to one side of one side plate, two first rollers rotationally connected between the two side plates and two millstones symmetrically and fixedly connected between the two side plates. The longitudinal stress is applied before calendering to stretch the material in advance, so that the transverse expansion trend of the material in the calendering process can be reduced in advance, the concentration of the transverse stress is reduced, and after the longitudinal stress is applied, the transverse stress of the material in the calendering process can be partially counteracted, especially in an edge area, so that the material is prevented from being damaged. And the phenomena of cracks and layering caused by stress concentration can be reduced.

The utility model relates to a structure for protecting a current bridge pier in the center of a channel, which comprises a protected bridge pile, an upper bridge pier and a bridge, first support piles and second support piles are respectively arranged on two sides of the channel in rows, and a circle of third support piles are arranged on the outer contour of the bridge pile. A first top beam, a second top beam and a third top beam are arranged at the tops of the first supporting pile, the second supporting pile and the third supporting pile correspondingly, and a first hidden beam, a second hidden beam and a third hidden beam are arranged at the positions, close to the first supporting pile, the second supporting pile and the third supporting pile, of the two sides of the bottom of the channel correspondingly. The supporting piles on the outer side of the bridge pile can prevent water flow scouring, the straining beams, the first hidden supports and the second hidden supports are used for cooperatively protecting the protected bridge pile and the bridge pier, deformation of a bridge structure can be reduced to the maximum extent, the hidden supports and the hidden beams are located below a channel, and the size of an overflowing section of the channel is not affected; and the drainage function of the channel is considered on the basis of ensuring the safety of the bridge structure.

The invention belongs to the technical field of resin preparation, and particularly relates to a preparation method of low-temperature curing resin, which comprises the following steps: step 1, selecting raw materials: bisphenol A epoxy resin, a latent curing agent, a carbon nano tube, nano silicon dioxide, glass fiber, aluminum hydroxide, a dispersing agent and a lubricating agent; according to the preparation method of the low-temperature curing resin, the bisphenol A type epoxy resin and the latent curing agent are selected and combined with various fillers such as the carbon nano tube, the nano silicon dioxide, the glass fiber and the aluminum hydroxide, and the low-temperature rapid curing resin with excellent performance is prepared. The cured resin shows excellent mechanical properties, including high tensile strength, bending strength and impact toughness, which are benefited from the reinforcing effect of fillers such as carbon nanotubes, nano silicon dioxide and glass fibers. Meanwhile, the rigidity and the heat conductivity of the resin are remarkably improved, so that the stability and the heat-conducting property of the resin in a high-temperature environment are more excellent.

The invention provides a low-modulus, high-strength and high-plasticity Ti-Zr-Nb-Hf-Ta series biomedical alloy which comprises the following raw materials in atomic percent: 30-45% of titanium, 30-45% of zirconium, 5-15% of niobium, 5-20% of hafnium and 5-20% of tantalum, the # imgabs 0 # value of the biomedical alloy is 2.6-2.75 eV, the # imgabs 1 # value of the biomedical alloy is 2.92-3.06, and the valence electron concentration of the biomedical alloy is 4.1-4.3. The tensile elastic modulus of the biomedical alloy ranges from 54.6 GPa to 57.8 GPa, the yield strength of the biomedical alloy ranges from 885 MPa to 1061 MPa, and the ductility of the biomedical alloy ranges from 14.8% to 25.6%. The preparation method comprises the following steps: mixing titanium, zirconium, niobium, hafnium and tantalum to obtain a mixture; and then carrying out vacuum treatment, gas washing, smelting and cooling to obtain the alloy. The biomedical alloy is low in elasticity modulus and high in yield strength and ductility, and the problems of stress shielding, biological mechanical compatibility and the like can be effectively relieved.

The epoxy resin interface fusion method based on ethylene glycol induction comprises the following steps: pretreating epoxy resin; ethylene glycol is added into the pretreated epoxy resin for a degradation reaction, and a degradation solution is generated; dropwise adding the degradation solution to the surface of epoxy resin to be bonded, and uniformly spreading; and putting the bonded epoxy resin into a heating environment for reaction to complete interface fusion. According to the method, the degradation solution of the epoxy resin is utilized, interface fusion is achieved under pressure-free treatment, thermal remodeling regeneration of the epoxy resin is achieved, an environment-friendly and sustainable recovery mode is provided, the risks of stress concentration and assembly connection in the interface fusion process are avoided, the limitation of a traditional interface fusion method is overcome, the connection efficiency is improved, and the production cost is reduced. The production cost is reduced.

The invention relates to the technical field of hydrogel, and discloses a conductive hydrogel matrix preparation method and a flexible strain sensor, prepared methoxypolyethylene glycol modified chitosan, a multi-arm alkenyl betaine type cross-linking agent, acrylamide and the like are polymerized to obtain a conductive hydrogel matrix, and the conductive hydrogel matrix can be used for preparing the flexible strain sensor; the multi-arm alkenyl betaine type cross-linking agent contains six alkenyl structures and can form a compact three-dimensional cross-linked network structure, and physical winding of an internal network of the organic hydrogel and strong hydrogen bonds of the chitosan cooperate to form strong physical cross-linking interaction; dipole-dipole interaction in quaternary ammonium salt and sodium sulfonate zwitterions is beneficial to ion migration, free moving ions with the maximum concentration can be released, the ion migration rate and conductivity are improved, and sensitive transmission of signals is facilitated; the conductive hydrogel matrix can be tightly bonded with base materials such as rubber and tinplate, and the bonding strength is high.

The invention discloses an assembly type wind power tower tube structure and method, and particularly relates to the technical field of wind power towers, a connecting plate is arranged between two circumferentially adjacent corrugated tower plates, a connecting assembly is arranged between two vertically adjacent corrugated tower plates, and a positioning mechanism is arranged on the connecting plate. The positioning mechanism comprises a laser transmitter arranged at the topmost end of the connecting plate, a diffuse reflection plate is arranged on the connecting assembly, and the transmitting end of the laser transmitter faces the corresponding diffuse reflection plate. According to the invention, by arranging the corrugated tower plate with the longitudinal section in the shape of the isosceles trapezoid with the wide lower part and the narrow upper part, the thickness of the corrugated tower plate is gradually thinned from bottom to top, so that the thickness of the whole plate of the tower drum is gradually thinned from bottom to top, and the problems of stress concentration and high gravity center of the middle-upper section of the tower drum are avoided; the overall wind resistance of the tower drum is effectively improved, and the gravity center height of the tower drum is remarkably reduced.

This utility model relates to the field of civil engineering technology, specifically a pile foundation shaking table test device. It includes a shaking table body, a container on top of which holds soil and a pile foundation model. The container includes a coaxially arranged rigid inner frame and a rigid outer frame. A flexible sidewall structure is provided between the rigid inner frame and the rigid outer frame. The flexible sidewall structure consists of circumferentially spliced ​​flexible plates and multiple sets of micro-springs connecting the inner surface of the flexible plates to the outer surface of the rigid inner frame. The top and bottom of the flexible plates are connected to the rigid inner and outer frames via sliding guide components to allow radial displacement of the flexible plates in the horizontal plane. This pile foundation shaking table test device, by improving the boundary structure, effectively reduces the soil boundary effect, more realistically simulates the interaction between the pile and soil system under seismic loading, and improves the accuracy of the test.

The invention discloses a forming process and application of an epoxy resin product. The molding process comprises the following steps: mixing preparation raw materials including epoxy resin, silica powder and an anhydride curing agent, and carrying out casting molding to obtain an epoxy resin product, wherein the conditions of casting molding are as follows: first-stage curing: curing at 105-120 DEG C for 3-10 hours; second-stage curing is conducted, specifically, curing is conducted for 16-22 h at the temperature of 130-135 DEG C; wherein the epoxy resin is solid bisphenol A type epoxy resin, the epoxy value of the epoxy resin is 2.4-2.65 Eq / kg, and the viscosity of the epoxy resin at 120 DEG C is 370-550 mPa.s. According to the process, an epoxy resin product with excellent performance can be prepared, the appearance quality of the molded epoxy resin product is good, and the process can be used for producing large-size and high-voltage-grade insulating products. The invention further provides application of the forming process.

The present application relates to the technical field of ring piece processing, and particularly relates to a rolling process control method and control system based on a special-shaped ring piece intelligent production line, comprising the following steps: S1: confirming a bevel angle, and calculating a maximum outer diameter of a fourth blank, a maximum inner diameter of the fourth blank, and a height of the fourth blank; S2: calculating a maximum outer diameter of a third blank, a maximum inner diameter of the third blank, and a height of the third blank; S3: calculating a maximum outer diameter of a second blank, a maximum inner diameter of the second blank, a height of the second blank, and a flat-bottom continuous skin thickness; S4: calculating a bottom outer diameter of a first blank and a thickness of the first blank; S5: calculating a thickness of a round bar; and S6: calculating a free forging upsetting speed, a tire membrane forging punching speed, a free forging punching continuous skin speed, a core roller feeding speed, and an expansion machine main cylinder movement speed during expansion. The present application improves the processing and forming quality of special-shaped ring pieces.

A loader frame articulation structure, belonging to the field of engineering machinery, includes a front frame and a rear frame, connected by an articulation assembly. The articulation assembly includes an articulation shaft, which is fixedly mounted on the front frame, and the rear frame is rotatably connected to the articulation shaft. The articulation shaft includes a cylindrical portion and a truncated cone portion. The truncated cone portion is fixedly mounted on the upper end of the cylindrical portion and installed within an articulation hole in the front frame. A mounting plate is mounted on the upper end of the truncated cone portion, and the mounting plate is fixedly connected to the front frame by bolts. The cylindrical portion is rotatably connected to the rear frame, and the lower end of the cylindrical portion is connected to the articulation hole on the front frame via a bushing. The use of a conical surface fit at the loader's articulation structure significantly improves the assembly accuracy and connection strength at the articulation point, thereby solving the connection strength problem at the articulation point under extreme working conditions and the fatigue wear problem caused by the increasing use time of the loader, effectively reducing the failure rate of the loader product.

This invention provides a new energy core based on wide-width amorphous alloy strip and its preparation method, comprising the following steps: winding the amorphous alloy strip based on a tension-wound diameter linear decreasing function to form a single-frame core; splicing multiple single-frame cores along the magnetic circuit direction to form a core body; and annealing the obtained core body under a protective atmosphere to obtain a new energy core. This invention solves the key technical problems of winding, splicing, and annealing of wide-width amorphous alloy strip in the preparation of high-power new energy cores, and realizes the preparation of large-size amorphous alloy cores with low loss, high saturation magnetic induction intensity, and high structural stability.

The invention provides a rotor surface treatment process, and relates to the technical field of surface treatment.The rotor surface treatment process is characterized in that a coating sequentially comprises a soft layer A, a hard layer B and a toughening layer C from a base body to the outside; the soft layer A is a metal lubricating composite layer formed by metal Mo or W and C or S with increasing content; the hard layer B is formed by metal nitride or carbonitride; a continuous component and structure gradient region is arranged between the soft layer A and the hard layer B; and the toughening layer C is a nanocrystalline-amorphous mixed structure formed by solid micro-diffusion of the hard layer B at 320-420 DEG C. Periodic micro-pits are formed in the surface of the toughening layer C and can be used for storing a lubricating medium. Through component gradient design and process hardening and tempering, the binding force, the wear resistance, the impact resistance and the stripping resistance of the coating are remarkably improved, the service life of the coating is prolonged, and the service life of the coating is prolonged. The method is suitable for high-load and high-friction working conditions such as vacuum pump rotors.

The present invention discloses a suspension sling for large-angle hoisting construction of concrete box girders and a method for using the suspension sling, the suspension sling comprises a crossbeam, each of which is provided with a lifting ear at both ends in the length direction; a threaded steel bar, which is horizontally fixed above the main beam of the box girder and is threadedly connected to the crossbeam, and the threaded steel bar vertically penetrates the crossbeam; a pair of push blocks, which are respectively arranged on both sides of the width direction of the main beam; wherein a groove for accommodating the push block is arranged on the side of the lifting ear opposite to the push block, and during the hoisting process, the push block is placed in the groove so that the push block and the lifting ear are linked. The lifting ear position of the suspension sling provided by the present invention is adjustable, and can be used for hoisting concrete box girders with large deflection angles, and the spacing between a pair of lifting ears is adjustable, and can be applied to box girders of different sizes.

The invention relates to a high-antibacterial absorbable medical suture and a preparation method thereof, and belongs to the technical field of medical materials. According to the suture line, PPDO serves as a base material, PLGA is introduced to wrap TCS through a melt blending and spinning technology, and a TCS-coated PLGA core-shell structure antibacterial agent is prepared. A gradient degradation release system is constructed by utilizing the characteristic that PLGA is faster in degradation than PPDO, so that TCS is slowly and continuously released, and the defects of explosive release and insufficient later concentration of drugs in a traditional direct blending method are overcome. Meanwhile, the core-shell structure effectively avoids destructive pores formed in a PPDO matrix due to rapid dissolution of drugs, and greatly maintains the mechanical integrity of the matrix, so that the suture line can provide stable supporting force similar to that of a pure PPDO line in a key healing period in vivo, and the synergism and unification of long-acting antibacterial property, lasting mechanical supporting property and high operation reliability are realized.

The utility model discloses a drill bit transportation protection device for petroleum drilling, and relates to the technical field of drill bits, the drill bit transportation protection device comprises a protection box, the bottom of the inner wall of the protection box is fixedly connected with a bearing base, the top end of the protection box is movably connected with a box cover in an inserted mode, the inner wall of the protection box is provided with a clamping assembly, and the clamping assembly comprises a vertical guide rail. The inner wall of the vertical guide rail is slidably connected with a vertical sliding block. Through the linkage design of the box cover and the lower pressing rod, automatic triggering of the clamping assembly is achieved. When the box cover is closed, the clamping arc plates can be driven to synchronously move and rapidly clamp the drill bit without additional operation, the clamping force is automatically adjusted along with the closing degree of the box cover, the device adapts to drill bits of different sizes, the universality of the device is improved, the arc block springs and the pressure-bearing springs provide vertical and transverse buffering effects correspondingly, and a three-dimensional buffering system is formed. In the transportation process, vibration energy generated by road bumping, collision and the like can be effectively absorbed.

The utility model discloses a barrel transfer appliance, including walking subassembly, lifting subassembly, rotatory subassembly, power subassembly and support subassembly, the lifting subassembly is welded on the top of walking subassembly, the rotatory subassembly is fixedly connected on the top of lifting subassembly, the power subassembly is fixedly connected on the top of walking subassembly, and the support subassembly is fixed on the top of walking subassembly. The supporting assembly is fixedly connected to the top of the rotating assembly. The lifting assembly comprises a base, and the base is fixedly connected to the top of the walking assembly. According to the device, the functions of walking, lifting, rotating and the like of the barrel can be achieved, the requirements for transferring, placing and rotating of the barrel are met, and the application scene is wide; the transfer of the barrel can be completed on the ground, the use of an overhead travelling crane is cancelled, the hoisting risk is eliminated, and the safety of the working environment is improved; a lifting hook, a lifting appliance and the like are not used in the transferring process, extrusion deformation of the barrel is eliminated, and the product manufacturing quality is improved.

The utility model discloses a cooling device for high strength and toughness aluminum alloy casting forming processing, and relates to the technical field of high strength and toughness aluminum alloy casting forming cooling devices, the cooling device comprises supporting legs, a fixing screw rod, a guide frame, a water diversion plate and a flow guide pipe, the fixing screw rod, a water storage bin and a bearing plate are installed above the supporting legs, a water storage tank is arranged above the water storage bin, a guide frame, rollers and a filter screen are installed on the side face of the water storage tank, a water distribution plate, a flow guide pipe and a water pump are arranged on the inner side of the water storage tank, the filter screen is slidably connected to the left side of the water storage tank, dismounting and cleaning are convenient, cleanliness of cooling water is guaranteed, and the service life of equipment is prolonged; the guide frame is in threaded connection with the supporting legs, so that the whole equipment is convenient to disassemble and maintain.

The invention relates to the technical field of heat management, provides a self-adaptive enhanced heat exchange method based on a high-temperature shape memory alloy, and further provides a self-adaptive enhanced heat exchange channel which is composed of a heat exchange channel pipe wall and a plurality of self-adaptive fins arranged on the outer side or the inner side of the pipe wall. The self-adaptive fin is of an integrated three-section structure and comprises a base connecting section, a functional gradient transition section and a self-adaptive functional section. Shape memory training is conducted on the self-adaptive fins or the self-adaptive functional sections, so that the self-adaptive functional sections have the temperature-induced deformation capacity; according to the thermal environment, the self-adaptive fins are automatically switched between the low-temperature / low-thermal-load state and the high-temperature / high-thermal-load state, and intelligent regulation and control over the heat exchange process are achieved. According to the self-adaptive heat transfer material, on-demand intelligent regulation and control of the heat exchange performance are achieved, the fixed tradeoff relation between the performance and the resistance is broken, and the technical problem that an existing self-adaptive heat transfer material cannot meet the high-temperature environment application requirement is effectively solved.

The invention discloses a foundation top surface frost heaving crack treatment device and a foundation top surface detection and repair method.The inhibition structure comprises multiple layers of annular units distributed in the longitudinal direction of a concrete body, and each layer of annular unit is provided with multiple annular pipes distributed in a concentric circle array; all the annular pipes in the same layer of annular units are communicated with one another through first communicating pipes, and every two adjacent layers of annular units are communicated with one another through second communicating pipes. The detecting and repairing method comprises the steps that after a restraining structure is arranged and formed, concrete is poured, so that the concrete wraps the restraining structure, and a concrete body is obtained; a through hole penetrating into the restraining structure is formed in the surface of the concrete body; and pressure data in the inhibition structure is obtained, a hydrophobic material is poured into the inhibition structure after it is determined that cracks exist in the inhibition structure, and the cracks in the inhibition structure are repaired through the hydrophobic material. According to the invention, crack development inhibition and rapid crack repair of the top surface of the power transmission tower foundation in a high cold environment are realized.

The utility model relates to the technical fields of wheel, disclose a kind of baby carriage wheel, including axle, the outer surface of axle is fixedly installed with walking mechanism;The inner surface of walking mechanism includes mounting disc, and the outer surface of mounting disc is fixedly connected with the outer surface of axle, the outer surface of mounting disc is fixedly installed with support frame, and the outer surface of support frame is fixedly installed with reinforcing frame.The baby carriage wheel, by axle first transmission to two sides symmetrical distribution's mounting disc of stepped convex round spoke shape.This structure utilizes its stepped flange to effectively disperse and reduce the stress concentration of junction place.Subsequently, load is mainly transmitted by multiple outwardly convex triangular solid support frame;The inherent geometric stability of the triangular structure is fully utilized, and the radial load is efficiently converted into compressive stress and tensile stress in the support frame, and the force is transmitted to the vertical rim with very high structural efficiency.The straight rim avoids the lateral component force generated by the inner inclined structure.

The invention discloses a four-door two-cover flexible trimming die switching system, and relates to the technical field of automobile manufacturing equipment.The four-door two-cover flexible trimming die switching system comprises a lightweight trimming die unit and a switching mounting base, and the lightweight trimming die unit is detachably mounted on the switching mounting base through a robot grabbing device; the bottom of the light-weight edge rolling die unit is provided with a gun changing disc butt joint part, and the switching installation base is provided with an electric quick-plug device and a positioning locking device which are matched with the gun changing disc butt joint part. According to the invention, a split type framework of the lightweight trimming die unit and the switching mounting base is adopted, and a full-automatic die switching system is constructed through a robot automatic grabbing and gun changing disc rapid butt joint technology. A gun replacing disc butt joint part arranged at the bottom of the die body, an electric quick-plug device of the base and a positioning locking device form a standard interface, and a robot is matched for accurate grabbing and positioning, so that the die replacing process is optimized from traditional manual hoisting calibration to machine autonomous recognition butt joint.