25results about How to "Improve stress stability" patented technology

This utility model relates to a cutting blade, belonging to the technical field of ultrasonic probe manufacturing equipment. The cutting blade is disc-shaped and used for rotary cutting of an ultrasonic probe to form piezoelectric array elements. The cutting blade includes a blade body and multiple gradient layers disposed on the outer side of the blade body. The multiple gradient layers are connected sequentially along the radial direction of the blade body, and the thickness of each gradient layer gradually decreases radially outward. Adjacent gradient layers are connected in a stepped manner, and the outer edge of each gradient layer away from the rotation center axis of the cutting blade forms a cutting edge, so that the cutting blade has multiple annular cutting edges arranged at radial intervals. The array elements of the probe cut by this cutting blade are pyramid-shaped, with narrow ends and wide bottoms, which ensures that the formed ultrasonic probe piezoelectric array elements are uniform in size, neatly arranged, and have better stability; effectively improving the resolution and stability of probe imaging.

The present application relates to the technical field of power transmission tower, and discloses a connecting joint of a steel pipe angle steel in a steel pipe tower of a power transmission line, two groups of the symmetrical clamping ends of the symmetrical clamping seats are provided with tight clamping plates, and the two sides of the two groups of symmetrical clamping seats are symmetrically provided with two groups of positioning bases, the inner sides of the two groups of positioning bases are symmetrically provided with two groups of direction adjusting guide rods, the end faces of the two groups of direction adjusting guide rods are symmetrically provided with direction adjusting holes, and the outer sides of the two groups of direction adjusting guide rods are provided with connecting seat assemblies. The present application replaces the welding connection form of the traditional cylindrical steel pipe main material and the angle steel auxiliary material, through the clamping of the two groups of symmetrical clamping seats, under the matching combination of the direction adjusting guide rods and the connecting seat assemblies, on the one hand, the present application has good uniform stress performance, so that the pressure of the high-voltage line is transmitted to the connecting joint through the angle steel auxiliary material, and then is uniformly transmitted to the cylindrical steel pipe main material through the connecting joint, thereby improving the stress stability of the steel pipe tower.

The application relates to the technical field of foundation pit backfilling, in particular to a foundation pit backfilling process and a foundation pit bottom cleaning device, which comprises a foundation pit bottom cleaning device, the foundation pit bottom cleaning device comprises a bearing bottom frame, loading support rods are correspondingly arranged on the front upper side of the bearing bottom frame, a bearing frame is arranged at the upper end of the loading support rod, and a conveying assembly is mounted on the front side of the bearing frame; the foundation pit bottom cleaning device can realize height regulation and control of the conveying assembly, so that the conveying assembly can better clean the garbage generated during the foundation pit bottom cleaning; the bearing frame in the foundation pit bottom cleaning device is obliquely arranged, the stress stability of the conveying assembly during garbage bearing and transportation is higher, the positioning and guiding effect of the winding wheel during the winding of the steel cable is good under the action of the guide wheel, the lifting control effect of the conveying assembly is better, the stress stability is higher, the overall use effect during the foundation pit bottom cleaning is good, and the efficiency is high.

This application discloses a method and system for Z-axis compensation of integrated circuit surface mount technology (SMT) for PCB board warpage, relating to the field of PCB board surface mount technology. The method includes: acquiring sampling data of the PCB board surface height and PCB board design information, extracting the physical structural features corresponding to each sampling point, and constructing a board surface warpage height model based on the sampling data; calculating the estimated board surface height for the target mounting position, and determining the Z-axis safe switching height of the mounting nozzle based on the thickness information of the component to be mounted and a preset safety margin; controlling the mounting nozzle to descend to the Z-axis safe switching height and then using a cutting force feedback correction mode, adaptively correcting the Z-axis displacement based on the dynamic error between the actual contact force and the target mounting force until the actual contact force falls within the preset error range to complete the mounting. This improves the accuracy of mounting height control, the stability of mounting force, and the consistency of mounting quality under complex warpage conditions.

The utility model discloses a modularized chair, which relates to the field of furniture structures and comprises a chair back main body, armrest main bodies, chair leg main bodies and a seat cushion plate, the chair back main body, the armrest main body and the chair leg main body are respectively formed by splicing a first chair back module and a second chair back module, splicing a first armrest module and a second armrest module as well as splicing a first chair leg module and a second chair leg module. According to the scheme, the modular structure below the chair can be clearly displayed, the ornamental value of the chair is increased, the first splicing blocks and the second splicing blocks are combined in a mutual lap joint, fitting and meshing mode to form the structure of the chair, the chair comprises a backrest, armrests, chair legs and other components, the module connection mode is achieved through customized hole site design, and the modular structure is more attractive. And the connecting sticks with different sizes are used for stable connection, so that the modules can be easily disassembled and recombined.

The utility model discloses a portable fire-fighting smoke exhaust device, and relates to the technical field of fire-fighting appliances. The battery box is mounted on the main beam, and a switch is arranged on one side; the mounting beam is mounted at one end of the main beam; the smoke exhaust fan is installed on the installation beam, the battery box is connected with the smoke exhaust fan through an electric wire to supply power to the smoke exhaust fan, and air is blown to the end away from the battery box when the battery box rotates; and the handle is arranged on the main beam. The fire-fighting smoke exhaust device has the effect that the portability of the fire-fighting smoke exhaust device is improved.

The invention relates to the technical field of hot pressing mold preparation, in particular to a preparation method and application of a cylindrical hot pressing mold of a carbon fiber woven structure. The preparation method comprises the following steps: preparing a wood mold; eVA is pasted on the surface of the wood mold, and then the procedure of weaving the carbon fibers in a reciprocating mode is carried out; obtaining a first carbon fiber woven structure; then, the procedure of sewing carbon fibers on the surface of the first carbon fiber woven structure is conducted through a sewing needle and a positioning tool, and a second carbon fiber woven structure is obtained; then the second carbon fiber woven structure is subjected to densification treatment, and a cylindrical hot-pressing mold crude product is obtained; and finally, the cylindrical hot-pressing mold crude product is subjected to finishing forming, and a cylindrical hot-pressing mold product is obtained. The cylindrical hot-pressing die prepared by the invention has good mechanical properties and thermal stability.

The utility model provides a lifting lever type manhole cover opening device relates to municipal works technical field, including cross rod, the downside of cross rod is provided with lifting lever type manhole cover opening subassembly, lifting lever type manhole cover opening subassembly includes the inner recessed slide groove of setting in the inside of cross rod, the inside of inner recessed slide groove all installs hydraulic pressure adjusting sliding block, the downside of hydraulic pressure adjusting sliding block installs hydraulic pressure rod, the outside of cross rod all is provided with lifting lever sliding frame, the downside of driven rotating shaft is welded with pull -out rod, the end of pull -out rod installs manhole cover clamping plate, put two groups of hydraulic cylinder to the both sides of manhole cover, the hydraulic cylinder starts to fill liquid at this moment, promotes the ascending of hydraulic pressure rod, drives lifting lever sliding frame to ascend, like this can realize the lifting lever type stress of manhole cover, reaches the opening effect, and lifting lever sliding frame can be according to the width of manhole cover and along cross rod left and right horizontal displacement to can be clamped to the cross bar of manhole cover, ensure that the stress of manhole cover is even in the opening process, avoid the damage of single point stress too big.

The utility model relates to the technical field of injection molding, in particular to a high-stability multicolor injection molding structure which comprises a protection box, a first injection molding module, a second injection molding module, a feeding pipe and a plurality of guide rods, the first injection molding module is fixedly installed at the right end of the protection box, and the edge of the left side of the first injection molding module is connected with the plurality of guide rods. The two feeding pipes are installed in the middle of the right side of the first injection molding module, the injection opening is connected with the feeding pipes, the second injection molding module is slidably connected to the guide rod, mold grooves are symmetrically formed in the left side of the first injection molding module front and back, and mold grooves are symmetrically formed in the right side of the second injection molding module front and back. Through the design of the crossed net ribs and the dovetail grooves, the stress stability of the mold groove is enhanced, color layer dislocation and waste material residues are reduced, and the injection molding precision and the production efficiency are improved; the operation process is simplified, the temperature is accurately regulated and controlled, and the product quality is improved.

The invention relates to the technical field of ship mooring, and particularly discloses a ship windproof anchor chain lock catch connecting structure and method. Comprising a lock body, a fixing bolt is fixedly connected to the inner side of the lock body, symmetrically-distributed fixing sliding rails are fixedly connected to the inner side of the lock body, a fixing connecting block is fixedly connected to the position, close to the fixing bolt, of the inner side of the lock body, a sliding bolt is arranged between the symmetrically-distributed fixing sliding rails, and the sliding bolt is sleeved with a windproof anchor chain connected with a ship. And a buffer elastic piece is fixedly connected between the sliding bolt and the fixed connecting block. The lock body and the windproof anchor chain are used for replacing a storm mooring rope, the sliding bolt and the windproof anchor chain on the sliding bolt are buffered through the buffering elastic piece, the toughness and ductility of the anchor chain are increased in a disguised mode, and therefore a large ship can still be safely moored and berthed under the condition that the number of storm bollards which can be used is insufficient; the difficulty and pain of safe berthing of the large ship are solved in a targeted mode, and the berthing safety of the large ship is improved.

This utility model discloses an optoelectronic integrated wiring box, relating to the field of cable installation technology, comprising: a wiring box, wherein a cable mounting rack for cable management is installed inside; the cable mounting rack includes: a U-shaped frame, detachably fixed to the inner wall of the wiring box, with a cable pass-through opening along the length direction at the middle of its bottom end; multiple cable grooves, spaced apart on both sides of the U-shaped frame, for cable separation and clamping; and a protruding part located inside the inner side wall of the U-shaped frame after being clamped by an elastic ball, providing continuous and elastic support for the suspended cable segment from the cable pass-through opening to the cable groove, so that the cable segment does not directly adhere to the bottom wall of the U-shaped frame under its own weight, but forms a continuous air insulation layer, i.e., a heat dissipation gap, between the cable and the bottom wall, thereby ensuring sufficient air convection space and facilitating heat dissipation during cable operation.

The invention discloses a combined elastic short sleeper transformation method and a rail structure thereof, and belongs to the technical field of urban rail traffic rail structures. According to the technical scheme, the transformation method sequentially comprises the steps of lifting a track, drawing out a rubber sleeve shoe, cleaning a sleeper and a sleeper pit, installing a geometric shape and position adjusting frame, brushing an interface binder, pasting an elastic base plate, pouring a pouring material, placing the sleeper, replacing a vibration reduction fastener, adjusting the geometric shape and position, detecting the strength of the pouring material and the like. The improved track structure comprises a short sleeper, a composite elastic layer, a short sleeper geometric shape and position adjusting frame and a vibration reduction fastener for the short sleeper, and the composite elastic layer is composed of an under-sleeper elastic base plate, a sleeper side elastic limiting base plate and a quick-setting elastic damping pouring material and replaces an original rubber sleeve shoe. The geometric shape and position adjusting frame achieves accurate positioning and dynamic adjustment of the sleeper through the sleeper positioning frame, the telescopic connecting rod and the rail gauge and rail cant control spring system.

This utility model relates to an automatic feeding device for a pipe thickening machine, comprising: an upper support, the lower side of which is connected to a lower support via a lifting mechanism and is driven to move up and down by the lifting mechanism; a linear guide rail is provided on the upper support; a fixed bracket assembly, including a fixed base plate and a liftable V-shaped wheel disposed thereon; a movable bracket assembly, which is slidably engaged with the linear guide rail via a movable base plate, and a liftable first V-shaped seat is provided on the movable base plate; a pipe clamping mechanism, which is slidably engaged with the linear guide rail via a clamping base plate, and the clamping base plate is provided with a linear drive mechanism, a gripper mechanism, and a liftable second V-shaped seat. The linear drive mechanism is used to drive the clamping base plate to move, and the gripper mechanism and the liftable second V-shaped seat are arranged parallel and spaced apart along the feeding direction, with the clamping center of the gripper mechanism coaxial with the center of the second V-shaped seat; the clamping base plate is connected to the movable base plate via a first connecting member. This utility model improves the positioning accuracy and stability of the pipe during the conveying process.

The invention relates to the technical field of photovoltaic power generation, in particular to an adjustable photovoltaic support which comprises a base, a first fastening screw, a second fastening screw, a reinforcing set, a fastening set and a pre-tightening set. According to the invention, the load of the photovoltaic panel and other components, which need to be installed subsequently, on the inclined frame when the photovoltaic panel and other components are subjected to external acting force is shared to the front and rear sliding blocks and the base, so that the stability when the photovoltaic panel and other components are subjected to the external acting force is improved; therefore, the two adjacent photovoltaic supports are integrally locked and fixed, and the overall stress stability is improved through mutual locking and limiting.

The present invention provides a mobile liquid hydrogen tank container, which includes an inner container and an outer container arranged outside the inner container. A plurality of sliding support structures are arranged between the inner container and the outer container in the circumferential direction. The sliding support structures are used to support the inner container and enable the inner container to slide along the axial direction relative to the outer container when thermal stress is generated in the mobile liquid hydrogen tank container. By setting the sliding support structure between the inner container and the outer container in a multi-point connection manner in the circumferential direction, the present invention reduces the contact area between the inner container and the outer container on the basis of supporting the inner container, achieves the purpose of reducing heat leakage, and the inner container is well stressed, which can improve the safety of the inner container.

This utility model relates to the field of communication base station technology, and in particular to a mobile integrated base station. It includes a cabinet with an inclined upper end. A solar panel assembly is rotatably mounted on the lower end of the inclined end. The upper end of the inclined end and the solar panel assembly are fastened together with bolts. Support rods are rotatably mounted on the side walls of the cabinet. The side walls of the solar panel assembly have insertion holes that mate with the support rods. A recessed groove is provided at the upper end of the inclined end, with the bottom wall of the groove recessed towards the rear wall of the cabinet. A mesh panel is detachably mounted on the rear wall of the cabinet at the bottom of the recessed groove. The recessed groove structure at the top of the cabinet allows electrical components to be embedded and installed without interference from the main equipment due to placement inside the cabinet. It also eliminates the need for maintenance personnel to reach into the cabinet through the door for disassembly and assembly, making operation more convenient. The three-point support structure formed by the rotating and adjustable solar panels and the support rods expands the operating space during maintenance, shortening the time required for line disconnection.

The application discloses a steel structure modular building containing bay windows and a construction method thereof. The building comprises a plurality of steel structure module boxes stacked in layers, and at least two bay windows are arranged on the outer sides of the adjacent module boxes. The bay window comprises two steel structure side frames arranged at intervals in the transverse direction and two reinforced concrete plates arranged at the top and bottom of the steel structure side frames respectively, the two ends of the reinforced concrete plate are connected with the corresponding steel structure side frame respectively, and the steel structure side frame is connected with the module top beam of the corresponding module box. In the two adjacent bay windows, the top end of the steel structure side frame of the lower bay window is connected with the bottom end of the steel structure side frame of the upper bay window through a fixing connector, so that the adjacent bay windows form a continuous force bearing structure. During construction, the bay window is first installed on the outer side of the corresponding module box, and then the adjacent bay windows are connected after the module boxes are hoisted and stacked in layers. The structure is beneficial to improving the reliability of the bay window node connection, the overall force bearing stability of the multi-layer bay window area and the adaptability of the modular construction.

The utility model relates to beam bridge reinforcing technical field discloses a kind of wide box girder bridge girder roof reinforcing structure, including bridge body, the reinforcing assembly is arranged in the bottom of bridge body, the reinforcing assembly includes reinforcing plate, the reinforcing plate side wall is fixedly connected in the bottom of bridge body, reinforcing frame is fixedly connected in the reinforcing plate inside, reinforcing rib is fixedly connected in the reinforcing frame inside, horizontal plate is fixedly connected in the reinforcing frame inside, reinforcing steel plate is arranged in the reinforcing frame top, multiple locating shafts are fixedly connected in the reinforcing frame inner wall.In the utility model, the up-down bidirectional reinforcing design of reinforcing plate and reinforcing steel plate, through top surface reinforcing steel plate, resist direct impact and wear of vehicle, with the help of bottom surface reinforcing component reinforcing structure stiffness, to realize the effect of efficient reinforcement, solve the problem of roof local stress concentration caused by the force transmission synergy deficiency of prior art, improve the stress stability and long-term service efficiency of wide box girder bridge girder roof reinforcing.

This invention relates to the field of double-blade sector cylinder technology, and discloses a spiral groove double-blade sector cylinder, including a sector cylinder shell, double blades, a valve stem, and a self-resetting mechanism. This structure employs a symmetrical double-blade configuration, ensuring that the blades on both sides receive synchronous and balanced force during cylinder inflation, eliminating the problem of unilateral load strain on the shaft caused by a single blade, reducing wear on the valve stem and shaft, and extending the overall service life of the cylinder. A slanted hole in the middle of the double blades connects the two chambers, further balancing the internal air pressure and enhancing stress stability. Simultaneously, the double-blade sealing ring is arranged on the outer edge of the blades and can be integrally molded with a rubber coating. During blade rotation, there is no relative sliding between the sealing ring and the blades, preventing seal displacement, overlapping, and breakage, effectively avoiding cylinder leakage and achieving higher sealing reliability.

The utility model relates to the technical field of steel bar truss laminated slab, specifically relates to a kind of installation structure of large-span prestressed steel bar truss laminated slab, including laminated slab body, distribution steel bar, installation component, steel bar truss, fixed component and connecting rod;The laminated slab body is set to rectangle, the distribution steel bar is installed on the two side surfaces of laminated slab body, and installation mode is set to welding and riveting, the installation component is installed on the upper surface of laminated slab body, the steel bar truss is installed on the upper surface of installation component, the steel bar truss is provided with 3, and three steel bar trusses are installed in the three-point setting of equilateral triangle, the fixed component is installed between steel bar truss, and installation mode is set to welding, the connecting rod is installed between multiple fixed components.

This invention discloses a medical nickel-titanium wire testing device, belonging to the field of mechanical testing, comprising a housing, a support plate, and a testing mechanism. Two sliders are slidably mounted on the top wall of the support plate; each slider is equipped with a clamping mechanism; the clamping mechanism includes a mounting groove formed on the slider, and a baffle covering the surface of the mounting groove is detachably mounted on the side wall of the slider; a through hole is formed on the side wall of the baffle. This invention effectively replaces the traditional friction winding clamp by adopting a clamping structure that combines negative pressure automatic guiding wire threading with in-situ embedding of photocurable resin, reducing the ineffective clamping length required at both ends of the nickel-titanium wire. This clamping mode allows for the direct use of small segments of finished instruments, several centimeters long, for high-precision testing, and converts the radial clamping force into a uniform axial shear force within the resin block during stretching, thereby reducing the probability of stress concentration and breakage of the filament at the clamping point, and also reducing the consumption of expensive medical-grade nickel-titanium raw materials.

The utility model relates to a prefabricated column hoisting device which comprises two 90-degree bent plates which are symmetrically arranged, the two 90-degree bent plates define a rectangular frame which is consistent with a prefabricated column in size, the two ends of each 90-degree bent plate extend outwards to form connecting plates, hoisting clamping plates are arranged between the two connecting plates at the two ends, and the hoisting clamping plates are connected with the two 90-degree bent plates. The two connecting plates are connected with the lower portions of the hoisting clamping plates through high-strength bolts, and hoisting holes are formed in the upper portions of the two hoisting clamping plates. The device is mainly used for hoisting the prefabricated column with corbels on the periphery, the prefabricated column is hooped through the two 90-degree bent plates for hoisting, a thin-wall steel pipe does not need to be pre-buried in the prefabricated column to form a preformed hole, the technological process in the production process of the prefabricated column can be reduced, and compared with a traditional method that a steel bar penetrates through the preformed hole, extends out of the prefabricated column and then is hoisted through a steel wire rope clamping ring, the hoisting efficiency is improved. The device is better in stress stability, is favorable for improving the hoisting safety of the prefabricated column, and is also convenient to mount and dismount.

The invention relates to a servo press with high precision, low inertia and stable pressure maintaining, which comprises a main body frame device, a cooling and damping device, a symmetrical servo transmission device, a nested transmission device, a high-torque transmission device, a shear fork pressure maintaining device, a pressure pad stable driving device and a cooling and damping device, the symmetric servo transmission device, the nested transmission device, the high-torque transmission device and the cooling and damping device are located on the upper portion of the main body frame device, the shear fork pressure maintaining device and the pressure pad stable driving device are located in the middle and below the main body frame device respectively, and the shear fork pressure maintaining device is connected with the main body frame device. The servo press adopts symmetrical servo driving, nested gear transmission and hydraulic shear fork pressure maintaining, is equipped with a water-cooling temperature reduction and vibration reduction structure, has the characteristics of high precision, low inertia, stable pressure maintaining and high operation stability, and is suitable for a metal stamping process with high requirements on machining precision, pressure maintaining stability and equipment operation reliability.

The utility model provides a tail end wedge-caulking type steel wire rope fixing device which is characterized in that two semi-conical sleeves are spliced to form an integral conical sleeve, and the integral conical sleeve is sleeved in a conical sleeve internally provided with a conical through hole to form a typical wedge-caulking matching structure. In the actual use process, when the steel wire rope bears pulling force, the spliced conical sleeve moves towards the small end direction along the conical hole of the conical sleeve under the pulling effect, and under the matching limitation that the conical hole is gradually narrowed, the two semi-conical sleeves are forced to be gradually and tightly attached to a rope core and a rope strand of the steel wire rope, so that the self-locking clamping effect that the steel wire rope is pulled more and more tightly is achieved; the steel wire rope is effectively prevented from slipping, and the connection firmness and the use safety are improved. Meanwhile, a through hole is formed in the middle of a semi-conical sleeve in the device and used for containing a main rope core of the steel wire rope, a plurality of inwards-sunken steel wire rope strand fixing holes are further formed in the side edge of the semi-conical sleeve, outer-layer rope strands of the steel wire rope can be embedded and fixed, and the effects of accurate guiding and force dividing are achieved.