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167results about How to "Guaranteed durability" patented technology

Permanent and temporary combined assembly type underground structure plate wall connecting joint

The utility model discloses a permanent and temporary combined assembly type underground structure plate wall connecting node which comprises an assembly type underground diaphragm wall, a full-length steel plate is installed on the side wall of the assembly type underground diaphragm wall, and a prefabricated structure plate is hoisted on the full-length steel plate. The gap between the prefabricated structural slab and the fabricated underground diaphragm wall is filled with ultra-high-performance concrete, and a steel bar structure is arranged in the ultra-high-performance concrete. According to the utility model, the rigid connection between the two prefabricated parts is realized, the integrity of the structure is improved, and the safety and durability of the underground structure are fully ensured; an underground diaphragm wall which is usually used as a temporary structure is changed into a permanent structure, so that the construction period is shortened, and the investment is saved; the ultra-high performance concrete poured in the joint can greatly shorten the anchoring length of the steel bars, enlarge the arrangement distance of the steel bars, obviously reduce the using amount of the steel bars on site and the binding workload, is convenient to install and simple in process, obviously improves the construction efficiency, and has high popularization and application value.
Owner:CHINA RAILWAY DESIGN GRP CO LTD

Viscous damper mounting structure

The utility model provides a kind of viscous damper mounting structure, including first mounting beam and second mounting beam, the first mounting beam is equipped with accommodating space, the inboard of accommodating space is equipped with viscous damper, the upper of second mounting beam is provided with first embedded part, the bottom of first embedded part is fixedly installed with fixed frame.The utility model is through the setting of first connecting rod, mounting sleeve, second connecting plate and connecting mechanism, when using, the cylinder barrel of viscous damper and fixed frame branch can be movably connected, the movable connection of both can also realize the movable connection of cylinder barrel of viscous damper and mounting beam, allow cylinder barrel to be multi-directional displacement with building structure in earthquake and not be restrained, while avoiding that cylinder barrel bears too large bending moment and torque, reduce the problem that cylinder barrel appears deformation or damage, to effectively guarantee the performance and durability of viscous damper.
Owner:CHINA NUCLEAR IND ZHONGYUAN CONSTR

An intelligent temperature control curing method for ultra-high performance concrete

ActiveCN121537224BAchieve accurate multi-dimensional characterizationGuaranteed pertinenceAuxillary shaping apparatusTemperature controlMechanics
This invention relates to the field of ultra-high performance concrete (UHVPC) curing technology, and more particularly to an intelligent temperature-controlled curing method for UHVPC. The method includes the following steps: generating preliminary temperature-controlled curing data for concrete based on UHVPC mix proportion parameters and temperature-controlled curing requirements data; analyzing the distributed temperature field characteristics of the pouring nodes using UHVPC pouring node data to generate distributed temperature field characteristic data for the pouring nodes; analyzing the temperature evolution and hydration state of the pouring node temperature field based on the distributed temperature field characteristic data and the preliminary temperature-controlled curing data to generate temperature evolution and hydration regulation state data; and performing dynamic temperature-controlled curing analysis on the preliminary temperature-controlled curing data to generate dynamic temperature-controlled curing data for the concrete. This invention achieves intelligent temperature-controlled curing by combining the application of UHVPC.
Owner:HUNAN HARBOR ENG INSPECTION CO LTD +1

Mounting structure of helicopter rotor shaft dynamic sealing ring dismounting tool

The utility model discloses a mounting structure of a helicopter rotor shaft dynamic sealing ring dismounting tool, which comprises a base, a dismounting head is arranged at the top of the base, the dismounting head comprises a push-and-pull disc, vertical rods are fixedly connected to the top of the push-and-pull disc in an annular array, a top disc is fixedly connected to the tops of the vertical rods, and the top disc is fixedly connected to the top of the push-and-pull disc. Hinge grooves penetrating to the bottom are formed in the top of the top disc in an annular array mode, hydraulic push rod sleeve connecting rods are fixedly connected to the bottoms of the inner sides of the multiple vertical rods, hydraulic push rod sleeves are fixedly connected to the inner sides of the multiple hydraulic push rod sleeve connecting rods, and second hydraulic push rods are fixedly connected to the inner walls of the hydraulic push rod sleeves. Through the arrangement of the dismounting head, the dismounting process of the sealing ring and the rotor shaft is simplified through the design of the dismounting tool, the dismounting efficiency and safety are remarkably improved, through accurate control of a hydraulic system, it is ensured that dismounting force is evenly applied, and the problem that the sealing ring is damaged or is not thoroughly dismounted due to the fact that the force is too large or too small is solved.
Owner:CHINESE PEOPLES LIBERATION ARMY AVIATION COLLEGE

A high-efficiency connecting device for brb and secondary structure wall

This utility model relates to the field of wall connection technology and discloses an efficient connection device between a BRB (Brick Reinforced Bench) and a secondary structure wall. It includes a channel steel 2C10 and an upper wall of the BRB. A steel frame beam is fixedly connected to the top of the channel steel 2C10, and an embedded part is fixedly connected to the bottom of the channel steel 2C10. A first connecting ear plate is provided on the outer side of the channel steel 2C10, and a tie bar is fixedly connected to the outer side of the first connecting ear plate. Polyurethane foam is provided at the bottom of the upper wall of the BRB. In this utility model, the double-layered channel steel and the tie bar on the connecting ear plate can disperse localized concentrated loads in the wall, effectively transferring these loads to the main structure, reducing stress concentration in the wall. Under seismic action, the tie bar forms an energy dissipation mechanism, helping to dissipate seismic energy and reducing damage to the building wall. The tie bar can also restrain the development of temperature shrinkage cracks, ensuring the durability and safety of the wall, and has significant market and social value.
Owner:BEIJING TIANHENG CONSTR

Fabricated steel structure and mounting method

The invention relates to the technical field of the building industry, and discloses a fabricated steel structure and an installation method, the fabricated steel structure comprises frame columns and frame beams, and the frame columns and the frame beams are connected in a matched mode; the modular node units are detachably connected with the frame columns and the frame beams respectively; the modularized joint unit comprises a first connecting plate and a second connecting plate, the sides, deviating from each other, of the first connecting plate and the second connecting plate are suitable for being connected with one ends of the adjacent frame columns correspondingly, and a box type steel column section is arranged between the first connecting plate and the second connecting plate; the two ends of the box type steel column section are connected with the first connecting plate and the second connecting plate correspondingly. The modularized joint units are further provided with I-shaped steel beam ends, and the two I-shaped steel beam ends are connected with the two ends of the box type steel column section respectively in the extending direction of the frame beam.
Owner:CHINA CONSTR STEEL STRUCTURE ENG CO LTD

Mixing device for producing plant growth regulator paclobutrazol

The utility model relates to the technical field of paclobutrazol production, in particular to a mixing device for production of a plant growth regulator paclobutrazol, which comprises a stirring tank, a feeding hopper is fixedly mounted at the upper end of the stirring tank, a base is fixedly mounted at the lower end of the stirring tank, a discharging pipe is fixedly mounted on the lower side of the stirring tank, and a feeding hopper is fixedly mounted at the upper end of the stirring tank. The discharging pipe is located at the center of the lower side of the stirring tank, a first motor is fixedly installed at the upper end of the stirring tank, a stirring assembly is arranged in the stirring tank, and a conveying assembly is arranged at the lower end of the discharging pipe. The first motor of the output shaft drives the rotating shaft and the stirring rod to rotate, the stirring rod swings on the support with the circular shaft as the axis, meanwhile, the rotating shaft rotates to drive the gear and the universal coupling to rotate, and the gear further drives the universal coupling and the stirring rod to rotate at the rear end of the rotating shaft through the gear ring. Therefore, rotary stirring of the rotating shaft and the stirring rod and rotary stirring of the axis of the stirring rod are achieved, and the uniformity and efficiency of material mixing are improved.
Owner:XINJI CHENDIAL CHONGGUANG CHEMICAL TECHNOLOGY CO LTD

Magnetic tea-water separation cup with side wall stirring and overturning structure

The utility model discloses a magnetic suction tea-water separation cup with a side wall shifting and overturning structure, which belongs to the technical field of daily necessities and comprises a cup body, a cup cover is arranged at an opening of the cup body, a filter screen is arranged in the cup, first magnetic blocks are respectively arranged at the upper end and the lower end of the filter screen, the cup cover comprises a lower cover body and an upper cover body, and a barrel-shaped placement groove with an upward opening is arranged in the lower cover body. An overturning part is rotatably mounted in the placement groove, the overturning part comprises a left driven gear and a right driven gear which rotate in the vertical direction, a mounting bin is fixedly connected between the left driven gear and the right driven gear, and a second magnetic block which attracts and repels the first magnetic block at the position opposite to the first magnetic block is arranged in the mounting bin; a rotating disc is rotationally installed between the lower cover body and the upper cover body, the lower end face of the rotating disc is provided with a rack meshed with the left driven gear or the right driven gear, the one-hand operation convenience is improved, parts are reduced, and the assembling difficulty and cost are reduced.
Owner:ANHUI FUGUANG IND

An oral cavity orthodontic mouth opener

The application belongs to the technical field of medical devices, and discloses an oral cavity orthodontic mouth gag, which comprises a mouth gag body and a saliva suction pipe, the mouth gag body is provided with an upper lip supporting part, the upper lip supporting part is provided with a groove, the inner side of the groove is provided with a flexible adjusting bag, the upper lip supporting part is connected with an adjusting assembly, the adjusting assembly comprises an outer cylinder and a piston assembly, the outer cylinder is communicated with the flexible adjusting bag through a conduit, the conduit arranged at both ends of the outer cylinder is provided with a one-way valve, the mouth gag body is connected with a cheek opening part through an adjusting part, the cheek supporting part is connected with a clamping part, and the mouth gag body is further connected with a sleeve ring which is arranged in cooperation with the saliva suction pipe. The application adjusts the inflation state of the flexible adjusting bag on the inner side of the upper lip supporting part by means of the adjusting assembly, so as to adjust different opening degrees and improve the comfort when the upper lip is opened; the connecting position and angle of the cheek opening part and the mouth gag body are adjusted, so as to adjust the opening position and expose the visual field of the corresponding position.
Owner:PEKING UNIVERSITY THIRD HOSPITAL (THE THIRD CLINICAL MEDICAL SCHOOL OF PEKING UNIVERSITY)

Robot connecting line protecting and reinforcing device

The utility model discloses a robot connecting line protecting and reinforcing device, which relates to the technical field of robot connecting lines, comprises a fixed base, a connecting bent piece and an outer protecting tube, and is characterized in that a first rotating bearing is fixedly connected to the outer side of one end of the connecting bent piece, and a base threaded connecting piece is rotatably connected to the outer side of the first rotating bearing; the base threaded connecting piece and the fixed base are in threaded connection with each other, second rotating bearings are fixedly connected to the outer sides of the two ends of the outer protection pipe correspondingly, and threaded rings are rotationally connected to the outer sides of the two second rotating bearings correspondingly. The fixing bases are installed at the two ends of a robot outgoing line in a threaded mode, then one ends of the two sets of connecting bent pieces are installed on the two sets of base threaded connecting pieces respectively and connected to the fixing bases in a threaded mode, and a robot connecting line penetrates through the inner threading protection pipe on the inner side of the outer protection pipe.
Owner:GUANGZHOU RUIXING INTELLIGENT EQUIP TECH CO LTD

Coaxial cable with coating structure

The utility model discloses a coaxial cable with a coating structure, which comprises an elastic middle shaft sleeve, the side end of the elastic middle shaft sleeve is fixedly connected with first mounting rings, the first mounting rings are symmetrically distributed at the left end and the right end of the elastic middle shaft sleeve, a spring conductor is arranged in the elastic middle shaft sleeve, and the first mounting rings are fixedly connected with the spring conductor. The left end and the right end of the spring conductor are fixedly connected with butt joint conductors. The butt joint sleeves are connected with the elastic middle shaft sleeve in a sleeving mode, the butt joint sleeves are fixedly connected with the first mounting ring through bolts, and the butt joint sleeves are symmetrically distributed at the left end and the right end of the elastic middle shaft sleeve; according to the coaxial cable, the elastic middle shaft sleeve, the spring conductor, the butt joint sleeve, the insulated cable pipe and the bolt form an elastic tensile structure, so that the coaxial cable can cope with high-strength tensile force in the use process, the tensile capacity of the coaxial cable is enhanced, and the durability of the coaxial cable is ensured.
Owner:商丘祈硕电子科技有限公司

Electrochemical pelletizing electrode deintercalation lithium extraction membrane stack electrolysis equipment

The application discloses an electrochemical granulation electrode deintercalation lithium extraction membrane stack electrolysis equipment, which comprises an electrolysis tank and an electrode assembly; the electrolysis tank comprises a first side plate, a piece of side plate rubber pad, a plurality of tank bodies, another piece of side plate rubber pad, a second side plate and a first tank body rubber pad, an anion membrane and a second tank body rubber pad arranged in sequence between two adjacent tank bodies; the tank bodies are divided into anode tanks and cathode tanks, the anode tanks and the cathode tanks are arranged alternately in an X direction from the first side plate to the second side plate, and the number of the anode tanks is equal to that of the cathode tanks; and an elastic porous pad is laid on the inner cavity bottom wall of the tank body. The electrolysis equipment can realize efficient extraction of lithium resources in salt lake brine, has the advantages of high lithium recovery rate and current efficiency, and is convenient to install, maintain and observe and monitor in the lithium extraction process.
Owner:BEIJING ZHONGKE BRUNP RECYCLING TECHNOLOGY INNOVATION CO LTD +1

Environment-friendly bell toy capable of being grabbed safely

The utility model relates to the technical field of toys for children, and discloses an environment-friendly bell toy capable of being grabbed safely, which comprises a ball cover and a splicing component, a plurality of notch grooves are arranged on the outer side of the ball cover, a bell is arranged on the inner side of the ball cover, a connecting rod is fixedly connected to the outer side of the ball cover, the splicing component is arranged in the connecting rod, and the splicing component is arranged on the inner side of the connecting rod. The splicing assembly is used for combining two toys together, and a protection assembly is arranged on the outer side of the connecting rod and used for enabling a child to safely grab the connecting rod; the protection assembly comprises a rubber sleeve. The connecting rod is sleeved with the rubber sleeve, the clamping groove is clamped with the clamping block, then the inner side of the connecting rod is tightly adhered by the adhesive ring, and the end of the rubber sleeve is slightly thinner than the limiting block and can be prevented from being stirred by a child, so that the rubber sleeve is stably installed on the outer side of the connecting rod, and the rubber sleeve has the buffering and protecting effects; and the children who grasp the rubber sleeve cannot be hurt, so that the safety of the bell toy is greatly improved.
Owner:ALGAE PROTECTION FUTURE (JINAN) MARINE BIOTECHNOLOGY CO LTD

Rotary kiln for cement production

PendingCN121953654AImprove assembly convenienceEliminate connection gapsFurnace componentsRotary drum furnacesThermodynamicsMechanical engineering
The invention relates to the technical field of rotary kilns, in particular to a rotary kiln for cement production, which comprises a base and a kiln body arranged on the base, and a kiln head and a kiln tail are respectively arranged at two ends of the kiln body; prefabricated assemblies are arranged in the kiln head and the kiln tail; the prefabricated assembly comprises heat insulation bottom plates laid on the inner wall of the kiln head and the inner wall of the kiln tail, the kiln head and the kiln tail are connected and assembled through the prefabricated parts such as the heat insulation bottom plates and the heat insulation top plates, and better heat preservation and fireproof effects are achieved in a double-layer heat insulation mode; the problems that the temperature is high, heat dissipation is fast, and energy consumption of products is large in the calcining process of existing castable are solved, the heat insulation bottom plate can be tightly attached and connected in the transverse direction and the longitudinal direction by means of a positioning structure and a fixing structure in the assembling process, and therefore the assembling convenience of prefabricated parts of the type is improved; and a connecting gap of the inner side heat insulation bottom plate can be eliminated, and the heat preservation performance and the durability are guaranteed.
Owner:TONGREN SOUTHWEST CEMENT CO LTD

A pneumatic valve support

This utility model discloses a pneumatic valve bracket, relating to the field of pneumatic valve technology. It includes a fixing ring and a base plate. A pad is provided on the top of the fixing ring, and a shock-absorbing mounting mechanism is provided on the top of the pad. The shock-absorbing mounting mechanism includes a first shock-absorbing pad. This utility model, through the setting of the shock-absorbing mounting mechanism, can achieve the function of damping vibration at the connection between the valve and the bracket. During use, the first and second shock-absorbing pads are installed by the cooperation of a first bolt and a first nut, and a second bolt and a second nut. The first and second shock-absorbing pads dampen vibration at the connection between the valve and the bracket, avoiding the situation where, due to the difficulty in damping vibration at the valve-bracket connection, the fluid medium flowing through the valve causes continuous impact and vibration on the valve body. This vibration is directly transmitted to the valve body, accelerating wear and significantly shortening the valve's service life, thus ensuring the durability and practicality of the bracket.
Owner:BEIPIAO POWER STEEL CASTING CO LTD

A pin feeding and pressing device

ActiveCN224424846URealize loading automationImprove efficiencyMachinePhysics
This utility model discloses a pin feeding and pressing device, relating to the field of automated assembly technology. It includes an L-shaped mounting base, a connector, a pushing mechanism, and a positioning buffer mechanism. The upper surface of the L-shaped mounting base has a through groove for dropping pins at its right end. A connector is fixedly connected above the through groove, and the connector communicates with the output end of an external automatic pin blowing machine. A pushing mechanism is located below the L-shaped mounting base. This utility model provides an efficient, stable, and safe automatic pin feeding and pressing device. The device uses an automatic pin blowing machine to feed pins into a dropping groove formed by a rotating arm via the connector, achieving automated feeding, significantly improving efficiency and reducing labor intensity. Subsequently, driven by a push cylinder, the pushing mechanism smoothly and accurately transports the pins along the guide rail to below the upper pressing head. The entire process requires no manual intervention, reducing safety hazards.
Owner:HEFEI HEYA AUTOMATION EQUIP CO LTD

High-strength integrated stainless steel crimped straight connector

This utility model discloses a high-strength integrated stainless steel crimped straight connector, including a lower arc block. A hinge block is fixedly connected to one side of the lower arc block, and an upper arc block is fixedly connected to one side of the hinge block. A locking mechanism is fixedly connected to one side of both the lower and upper arc blocks, and a pull rod is fixedly connected to the top of the locking mechanism. Circular partition plates are fixedly connected to both sides of the lower arc block, and the upper arc block is movably connected inside the two circular partition plates. Two arc plates are fixedly connected inside the lower and upper arc blocks respectively. A circular connecting plate is fixedly connected inside the lower arc block, and a connecting cylinder is fixedly connected inside the circular connecting plate. Rubber rings are fixedly connected to both ends of the connecting cylinder. This utility model allows two pipes to be quickly and accurately connected within the device, ensuring the coaxiality of the pipe connection, avoiding poor media transmission due to installation deviations, and withstanding high pressure and external impacts, thus improving the installation efficiency and operational reliability of the pipeline system.
Owner:QINGDAO UNITE MASCH CO LTD

Water softener

The utility model provides a water softener. The water softener comprises a resin tank; the salt box is provided with a first containing cavity, a mounting opening and a first limiting part, the first containing cavity is used for containing saline water and the resin tank, the mounting opening is located in the top of the salt box and communicates with the first containing cavity, and the first limiting part is located on the bottom wall of the first containing cavity and matched with the lower portion of the resin tank; the supporting middle shell is arranged on the salt box, covers the mounting opening and is provided with a second limiting part, and the second limiting part is arranged around the upper part of the resin tank; and the flexible part is arranged between the outer wall of the upper part of the resin tank and the second limiting part. The first limiting part arranged on the bottom wall of the salt box is matched with the lower part of the resin tank to limit the horizontal displacement; and meanwhile, the second limiting part of the supporting middle shell is combined with the flexible component to conduct surrounding constraint on the upper portion of the resin tank, horizontal movement is limited, vertical vibration is buffered, stable installation of the resin tank is achieved, and the loosening problem caused by machining errors or deformation is avoided.
Owner:FOSHAN XINYAO ENVIRONMENTAL PROTECTION TECHNOLOGY CO LTD

Suspended floor with reinforcing columns

The utility model discloses a suspension floor board with a reinforcing column, which comprises a floor board main body, the center of the floor board main body is fixedly connected with a central column, a plurality of groups of support plates are distributed on the circumference of the outer wall of the central column, and two ends of each second insertion rod are in contact with the outer walls of two adjacent groups of first insertion rods. Under the dynamic impact effect, the elastic reset force of the spring enables the fixing rod to press the first inserting rod and the second inserting rod all the time, micro elastic deformation of the floor body is allowed, and the problems that due to stress concentration in traditional rigid connection, rib plate intersection joints crack, and the root of a center column is fractured are effectively solved; a cross nested structure formed by the reinforcing plates and the supporting plates can evenly disperse loads to the center column and the floor body, and the impact resistance of the suspension floor under the high-frequency dynamic loads is improved.
Owner:HENAN PINLIAN SPORTS IND CO LTD

High-durability switch tie

The utility model belongs to the technical field of switch sleepers, and discloses a high-durability switch sleeper which comprises a steel switch sleeper body, steel switch rail bodies are symmetrically and fixedly arranged on the upper surface of the steel switch sleeper body, forking pieces are symmetrically arranged in the steel switch rail bodies, grooves are symmetrically formed in the steel switch rail bodies, forking grooves are formed in the forking pieces and a support of the steel switch rail bodies, and the forking pieces and the support of the steel switch rail bodies are connected through the forking grooves. A plurality of connecting blocks are symmetrically and fixedly arranged on the lower surfaces of the linear rail bodies, the lower surfaces of the connecting blocks are movably attached to the corresponding linear rail bodies, bent steel columns are fixedly arranged on the outer sides of the connecting blocks, fixing plates are arranged on the outer surfaces of the bent steel columns in a clamped mode, and clamping grooves are symmetrically formed in the upper surfaces of the linear rail bodies. According to the scheme, the steel switch sleeper body and the steel switch rail body are adopted, the strength is high, the toughness is good, the service life is long, connection is stable, and the rail stability and durability are good; the linear rail body and the like are detachable, installation, adjustment, maintenance and replacement are convenient, flexible combination can be achieved through modular design, and the construction efficiency and adaptability are improved.
Owner:WUHAN SLEEPER TRACK EQUIPMENT CO LTD

Vehicle-mounted signal lightning protection and nuclear electromagnetic pulse protection integrated module

The utility model discloses a vehicle-mounted signal lightning protection and nuclear electromagnetic pulse protection integrated module, which relates to the technical field of signal switching equipment and comprises a box body, a plurality of signal transmission assemblies and a protection module. The box body comprises an inner box and an outer box, each signal transmission assembly comprises a first signal connector and a second signal connector, the first signal connector is arranged in the outer box, the second signal connector is arranged in the inner box, and the first signal connector is connected with the corresponding second signal connector through a signal transmission line; the first signal connector is used for transmitting signals with the corresponding second signal connector, the protection module is arranged in the box body, and when signal transmission is carried out between the first signal connector and the second signal connector, the protection module is used for carrying out electromagnetic pulse protection and / or lightning protection on equipment connected with the signal transmission assembly; according to the technical scheme provided by the utility model, the vehicle-mounted installation space can be saved.
Owner:深圳市拓海通用电气有限公司

Panel structure of vibrating feeder

The utility model discloses a vibrating feeder panel structure which comprises a panel, a plurality of stepped boss sets are arranged on the surface of the panel at equal intervals in the conveying direction, each stepped boss set is composed of three bosses, the heights of the three bosses are sequentially increased in the panel conveying direction, and a stepped pushing structure is formed. The boss is of a composite structure and sequentially comprises an arc-shaped wear-resistant head part, an elastic connecting part and a bottom plate from top to bottom; the upper end of the elastic connecting part is fixedly connected with the arc-shaped wear-resistant head part, and the lower end is fixedly connected with the bottom plate; according to the panel structure of the vibrating feeder, the stepped boss sets with the heights gradually increased in the conveying direction are arranged on the surface of the panel, a stepped pushing structure is formed, iron ore aggregates can be effectively dispersed, accumulation is avoided, and the conveying efficiency is improved.
Owner:JIANGSU FANJUE MASCH MFG CO LTD

Tube component and vascular intervention catheter with same

The invention provides a tube component and a vascular intervention catheter with the same, a notch is formed in the tube component, the notch is provided with a first edge and a second edge, and the first edge and the second edge are oppositely arranged in the axial direction of the tube component; the first edge and the second edge are arc-shaped on the unfolding plane of the pipe component; any point is used as an original point, a straight line passing through the original point and perpendicular to the axial direction of the pipe component is used as an X axis, a straight line passing through the original point and parallel to the axial direction of the pipe component is used as a Y axis, a coordinate system is established, the track of the first side meets a function, the track of the second side meets a function, y1 is larger than or equal to y2, a is the maximum width value of the notch in the axial direction of the pipe component, and b is the outer circumference of the pipe component. The tracks of the first side and the second side meet the cosine functions (1) and (2) respectively, the distribution area of large stress on the pipe component can be increased, stress concentration on the pipe component is reduced, and the fracture resistance and durability of the pipe component are improved.
Owner:SHANGHAI ACHIEVA MEDICAL SUZHOU CO LTD

A cold-rolled precision steel strip of type 8B and its manufacturing method

This application relates to an 8B cold-rolled precision steel strip and its manufacturing method, comprising a steel strip body and a high-strength coating. The high-strength coating is formed by applying a high-strength coating material to the surface of the steel strip body. The high-strength coating material comprises the following components in parts by weight: 85-105 parts resin matrix, 13-17 parts graphene dispersion system, 6-8 parts nano boron nitride, 0.5-1.5 parts leveling agent, 0.8-1.2 parts dispersant, and 4-6 parts coupling agent. This application has the effect of improving the overall hardness and corrosion resistance of the steel strip.
Owner:SHANGHAI YAOPO NEW MATERIAL TECHNOLOGY CO LTD

Flame-retardant antistatic nylon fiber with skin-core structure and preparation method of flame-retardant antistatic nylon fiber

The invention provides a flame-retardant antistatic nylon fiber with a skin-core structure and a preparation method of the flame-retardant antistatic nylon fiber, and belongs to the technical field of nylon fibers. The flame-retardant antistatic nylon fiber comprises an antistatic nylon skin layer and a flame-retardant nylon core layer, the outer surface of the flame-retardant nylon core layer is coated with the antistatic nylon skin layer, the antistatic nylon skin layer comprises a nylon 6 matrix and an antistatic agent, and the antistatic agent is aniline modified zirconium phosphate; wherein the aniline modified zirconium phosphate is obtained by carrying out in-situ polymerization on aniline monomers between stripped zirconium phosphate layers. The flame-retardant antistatic nylon fiber is obtained through sheath-core composite melt spinning. According to the invention, the antistatic agent and the flame retardant are efficiently and stably introduced into the nylon matrix, and the synergistic effect of the antistatic agent and the flame retardant is realized, so that the fiber has better spinnability and mechanical property, and meanwhile, the long-term effect and durability of the function are ensured.
Owner:ZHEJIANG HENGYI PETROCHEMICAL RES INST CO LTD

A nanofiber thermal conductivity measuring device and a measuring method thereof

ActiveCN117849131BAccurate and effective measurementsmall current flow areaChemical physicsSingle fibre
The present disclosure provides a kind of nanofiber thermal conductivity measuring device, the measuring device includes: middle hollow base, first and second side wall are formed around the hollow place and oppositely arranged third and fourth side wall;Two conductive electrodes are formed on the first and second side wall respectively;And support layer, adhesive layer and suspension electrode are sequentially stacked from bottom to top, the suspension electrode is supported on the first and second side wall by support layer, current is applied to the suspension electrode by two conductive electrodes to make it as hot end, the thermal resistance of suspension electrode is greater than the thermal resistance of the nanofiber to be measured, and the two ends of nanofiber are supported on the suspension electrode and the fourth side wall respectively.The suspension electrode in the present disclosure has the characteristics of long electrode length and small current flow area, so it has much greater thermal resistance than conventional single fiber measuring device, and can solve the problem of low signal-to-noise ratio in low thermal conductivity nanofiber thermal conductivity measurement.
Owner:TSINGHUA UNIVERSITY

Novel prefabricated vertical component protection layer structure

ActiveCN224106725UPrecise structural positionavoid partial thickeningBuilding reinforcementsRebar corrosionArchitectural engineering
The utility model discloses a novel protection layer structure of a prefabricated vertical component, which relates to the field of concrete structure construction, the cross section of the structure is a component main body of a rectangular cylinder, a main framework support is arranged in the component main body, a groove is arranged on the side surface for accommodating a transverse steel bar, a curved surface reed is arranged at the opening of the groove, and U-shaped hooks inclined inwards are arranged at the two ends of the component main body. Materials of the main framework are selected according to the thickness of a vertical component, and a component body is filled with fine aggregate concrete or high-strength mortar. The working mechanism is as follows: firstly prefabricating the tire membrane, installing the main framework and the hook during cast-in-place, and pouring the filler. The structure can effectively avoid many defects caused by the fact that the protective layer is too thick or too thin, and compared with the prior art, the structure has the remarkable beneficial effects of guaranteeing structural stability, preventing steel bar corrosion, improving construction quality and structural performance and the like.
Owner:ANHUI SANJIAN ENG +1

Intelligent milling device for automobile precision parts

The invention discloses an intelligent milling device for automobile precision parts, and relates to the field of milling equipment, the intelligent milling device comprises a device shell and a triangular claw disc mounted on the inner side of the device shell, a driving seat is arranged above the triangular claw disc, the driving seat is mounted on the inner side of the device shell, and a driving shaft is fixedly mounted at the output end of the driving seat; a fixed inserting cylinder is fixedly mounted at the bottom end of the driving shaft; a milling cutter is mounted on the inner side of the fixed inserting cylinder; the outer supporting mechanism is used for providing auxiliary supporting for the milling cutter, the outer supporting mechanism is installed on the outer side of the milling cutter, and the outer supporting mechanism comprises three pressing rollers which are arranged on the outer side of the milling cutter in a central symmetry mode; by means of the outer supporting mechanism, the three pressing rollers can abut against the outer side of the milling cutter in a centrosymmetric mode, the pressing rollers and the milling cutter can rotate in the same direction and at the same speed, the pressing rollers can support the outer side of the milling cutter, meanwhile, the friction situation is avoided, the safe supporting effect is achieved, and the durability of the milling cutter and the pressing rollers is guaranteed.
Owner:SUZHOU PROGRESS PRECISION PARTS CO LTD

Drainage system for road-bridge transition section

This utility model relates to the field of engineering construction technology and provides a drainage system for a bridge-road transition section. The drainage system is installed at the junction of the bridge abutment and the bridge-road transition section, and includes: a drainage board laid on the back of the bridge abutment, with the opposite side of the drainage board facing the water, and multiple drainage channels extending from top to bottom distributed on the water-facing surface; and a drainage pipe placed at the bottom of the drainage board and arranged along the direction of the drainage channels, with the bottom end of the drainage channels connected to the drainage pipe. This arrangement effectively prevents water seepage into the bridge abutment by using the drainage board on the back of the bridge abutment, and allows seepage to drain quickly from the back of the bridge abutment, protecting the bridge abutment structure from water erosion, thereby ensuring the durability and structural stability of the bridge abutment and reducing maintenance costs.
Owner:CHINA RAILWAY 19TH BUREAU GRP EAST CHINA ENG CO LTD

Chain groove curved surface surfacing path control method and device, electronic equipment and storage medium

The present application relates to chain wheel repair technical field, especially to a kind of chain nest curved surface surfacing path control method, device, electronic equipment and storage medium, the present application method first obtains first curved surface;Then based on the first curved surface, constructs multiple first surfacing path data sets;Then for each first surfacing path data set, iteratively point position data is taken out from data set as target point position data, according to the near neighbor point position data of the target point position data determines welding posture, and welding posture is added to first surfacing path data set and obtains second surfacing path data set;Finally, according to the multiple second surfacing path data sets to chain wheel assembly, to chain wheel is surfacing and / or cladding.The present application chain nest curved surface surfacing path control method generates surfacing path according to curved surface, and surfacing positioning is accurate, forms a predetermined thickness of surfacing layer arranged with curved surface, guarantees the quality and durability of surfacing.
Owner:ZHANGJIAKOU JINGYI COAL MINING MASCH CO LTD