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4835 results about "Pull force" patented technology
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Pull force is a reading that relates to the power of a magnet. The pull force of a magnet is determined by the amount of force that would be required to break the magnet free if it was attached to a steel plate. Calculation of the pull force requires the assumption...
Wafer grinding and polishing adjustment control system based on tension sensor
The invention relates to the field of wafer processing, and discloses a wafer grinding and polishing adjustment control system based on a tension sensor, which comprises a processing pressure acquisition module for acquiring the gravity of a heavy object, acquiring the tension of an electric cylinder in real time based on the tension sensor, calculating the processing pressure through a formula, and acquiring grinding state parameters of a wafer in real time; the processing pressure stability analysis module comprises a first analysis unit and a second analysis unit; the first analysis unit is used for calculating the accumulated variable quantity of the processing pressure in a preset monitoring period, comparing the accumulated variable quantity with a change threshold value and sending out an alarm signal; the second analysis unit inputs the grinding state parameters into a grinding state model to analyze a grinding state value, and reversely evaluates the state of the grinding disc; the adjusting control module adjusts the pulling force of the electric cylinder based on the first analysis unit and judges whether the grinding disc is replaced based on the second analysis unit. Accurate monitoring and stability control of the machining pressure are achieved, the state of the grinding disc can be effectively evaluated, and the wafer grinding and polishing quality and efficiency are improved.
Owner:MINGZHENG (ZHEJIANG) ELECTRONIC EQUIP CO LTD +1
Pump shaft simulation load bounce detection system with state conversion
The invention discloses a state transition pump shaft simulation load run-out detection system which comprises a pump, a dial indicator and a pull and push dynamometer. The pump shaft is provided with a driving disc and a stress disc, and the driving disc, the pump shaft and the stress disc are located on the same central axis. The dial indicator can be selectively configured in a radial run-out detection state by adjusting the position of the dial indicator and the direction of a measuring head, wherein the measuring head is perpendicular to the central axis and abuts against the outer circumferential surface of the pump shaft; in the axial run-out detection state, the measuring head is overlapped or parallel to the central axis and abuts against the axial end face of the pump shaft; the push-pull dynamometer can be selectively configured in a radial force application state by adjusting the position of the push-pull dynamometer and the direction of a force application end, wherein the force application end is perpendicular to the central axis and abuts against the outer circumferential surface of the stress disc, and a radial simulation load is applied; in the axial force application state, the force application end is parallel to the central axis and abuts against the disc end face of the stress disc, and an axial simulation load is applied. Through the state conversion of the same detection and force application device, the radial and axial runout integrated detection of the pump shaft under the simulated load is realized.
Owner:NANTONG INST OF TECH +1
Tensioning force control device for prestressed sleepers
PCT designated stage expiredWO2025098037A1Climate change adaptationAuxillary shaping apparatusPull forceGear wheel
The present invention relates to the field of construction machinery, and in particular to a tensioning force control device for prestressed sleepers. The present invention solves the problems of a large prestress deviation and low tensioning positioning efficiency during tensioning of prestressed steel wires. The device comprises a tensioning module, a tensioning rod and a locking module. The tensioning module comprises a tensioning jack and a tensioning rod connector. The tensioning jack comprises a plurality of cylinder bodies provided with piston rods. Oil injection cavities of the plurality of cylinder bodies are communicated and oil return cavities thereof are also communicated. The piston rods are connected to the tensioning rod connector. The tensioning rod connector is temporarily connected to the tensioning rod when in use. The outer wall of the tensioning rod is provided with a nut gear in threaded fit with the tensioning rod. The tensioning rod is provided with a tensioning stepped hole. The locking module comprises a locking motor and a locking gear that is engaged with the nut gear when in use. The locking motor is connected to the locking gear. Each piston rod is used for tensioning one prestressed steel wire, and synchronized oil intake and return for the plurality of piston rods are achieved, alleviating the overlarge prestress deviation between the prestressed steel wires. The locking module allows for time-saving and labor-saving tensioning positioning.
Owner:CHINA RAILWAY NO 9 GROUP CO LTD
Axial anti-pulling water-blocking cable
The invention provides an axial anti-pulling water-blocking cable, and relates to the technical field of water-blocking cables, a cable core is spirally twisted on a central anti-pulling bearing unit, the central anti-pulling bearing unit is used for bearing main pulling force, and due to the winding mode of the cable core, when the cable core is subjected to pulling force, the cable core can be prevented from being damaged. The cable core can extrude the central tensile bearing unit towards the center so as to obtain a certain extension buffer space, so that the conductor is prevented from being broken, and the liquid foaming agent capsule in the central tensile bearing unit is extruded and broken by utilizing an extrusion force exceeding a limited value; therefore, the first foaming agent in the cable penetrates through the woven central tensile bearing unit to be combined with the second foaming agent in the twisting gap of the cable core, a large amount of foam colloid is generated, a high-stress area, where water leakage possibly occurs, of the cable is pressurized and subjected to leaking stoppage, and active response to water blocking according to local stress sudden change is achieved. Compared with a traditional passive water blocking technology, the response speed is higher, and the water blocking effect is better.
Owner:NORTHEAST PLASTIC CABLE CO LTD
Foldable propeller and cross-medium aircraft with same
The utility model relates to a foldable propeller and a cross-medium aircraft with the same, the foldable propeller comprises a propeller hub controlled to rotate, a limiting structure arranged at the end part of the propeller hub and a plurality of blades uniformly arranged around the axis of the propeller hub, and each blade is hinged with the propeller hub; the hinged axis between the paddle and the propeller hub is perpendicular to the rotating axis of the propeller hub, and the limiting structure is located at the front end of the propeller hub in the direction of the pulling force generated when the paddle rotates along with the propeller hub; when the propeller hub rotates, the blades hinged to the propeller hub rotate and unfold under the action of centrifugal force to abut against the limiting structure. When the propeller hub stops rotating, the blades hinged to the propeller hub are folded to be close to the rotating axis of the propeller hub due to self weight or fluid resistance in the underwater flight process. The propellers are configured to be of a foldable structural form, so that the propellers are not prone to being impacted by water flow and damaged, meanwhile, turbulent flow generated when the water flow passes through the propellers is reduced, and the speed and stability of the cross-medium aircraft in the underwater flight process are improved.
Owner:HANGZHOU INTERNATIONAL INNOVATION INSTITUTE OF BEIHANG UNIVERSITY
Strength training machine
A strength training machine includes a bracket and a pulling assembly. The pulling assembly includes a handle assembly and a counterweight device, an end of the bracket is formed with a cavity structure, and the counterweight device is arranged in the cavity structure, where the counterweight device includes a resistance adjusting assembly and a drive wheel, the handle assembly includes a pulling piece, a first end of the pulling piece is used to apply a pulling force, and a second end of the pulling piece is attached to the drive wheel, and the drive wheel rotates under the driving of the resistance adjusting assembly, so that the pulling piece is coiled on a wheel surface of the drive wheel while generating a counterweight pulling force, where a sliding assembly is arranged at one of a bottom or a side of the cavity structure.
Owner:GUANGZHOU YUANDONG SMART SPORTS TECH CO LTD
Permanent magnet synchronous motor rotating speed stability control method based on propeller load
PendingCN120110240AElectronic commutation motor controlElectric motor controlLyapunov stabilityPull force
The invention discloses a cascaded auto-disturbance rejection rotating speed stability control method with a quasi-resonance link based on propeller load, and the method comprises the following steps: S1, building a speed ring mathematical equation containing disturbance according to the basic structure and working principle of a surface-mounted permanent magnet synchronous motor; s2, according to aerodynamic characteristics of the propeller, establishing a mathematical model of tension and load torque of the propeller; s3, establishing a quasi-resonance cascade active-disturbance-rejection speed controller containing disturbance compensation according to the S1 and the S2, and performing stability analysis on a cascade expansion observer equation according to a Lyapunov stability theorem; and S4, a cascade active disturbance rejection control method with a quasi-resonance link is used to realize suppression of periodic and non-periodic disturbance of the rotating speed so as to realize high-performance speed control. According to the method, the motor and the propeller are integrally modeled, the influence of periodic disturbance and non-periodic disturbance on the rotating speed is considered at the same time, and the method has better dynamic performance and steady-state performance.
Owner:HANGZHOU DIANZI UNIV
Transverse deformation device for cross beam of numerical control gantry machine tool
The invention relates to the technical field of machine tool cross beams, in particular to a numerical control gantry machine tool cross beam anti-deformation device which comprises a cross beam, two symmetrically-distributed top connecting pieces are rotationally installed at the top of an inner cavity of the cross beam, and two symmetrically-distributed bottom connecting pieces are rotationally installed at the bottom of the inner cavity of the cross beam. The distance between the two bottom connecting pieces is smaller than that between the two top connecting pieces, tensioning assemblies with adjustable tightness are installed between the bottom connecting pieces and the adjacent top connecting pieces, the two top connecting pieces are located at the two ends of the cross beam, and the two bottom connecting pieces are located in the middle of the cross beam. According to the invention, through the top connecting piece, the bottom connecting piece and the tensioning assembly, an obliquely upward pulling force is applied to the cross beam, the pulling force is decomposed into a vertically upward force and a horizontal force, and the vertical force can offset the gravity of the middle part of the cross beam, so that the downward bending deformation of the cross beam is reduced, and the purpose of reversible deformation is achieved.
Owner:ITALIAN (CHUZHOU) INTELLIGENT CNC TECH CO LTD
Bridge prestress tensioning device and using method
The invention relates to the technical field of bridge construction, and discloses a bridge prestress tensioning device which comprises a prefabricated box girder, a plurality of tensioning assemblies are arranged on the prefabricated box girder, and the tensioning assemblies are used for applying tensioning force to the prefabricated box girder. The tensioning assembly comprises a corrugated pipe, a fixing clamping block, a first limiting block, a conical clamping sleeve clamping piece, a steel strand, a protective outer cover, a hydraulic driving assembly, a spiral fixing strip, a grouting hole, a second limiting block and a protruding block, and the spiral fixing strip arranged on the conical clamping sleeve clamping piece is in a spiral shape matched with the twisting direction of the steel strand; in this way, when the hydraulic driving assembly abuts against the second limiting block, the conical clamping sleeve clamping piece can exert certain twisting acting force on the steel strand, and therefore the fixing stability of the steel strand is enhanced, and the situation that in a traditional mode, when a clamping piece sleeve with the smooth inner wall is used for fixing, the clamping piece sleeve cannot be fixed easily is avoided. And the problem that the steel strand is difficult to fix stably for a long time due to single clamping force is solved.
Owner:HENAN ZHIPENG PRESTRESSING EQUIPMENT CO LTD
Rotary table bearing-torque motor thermal vibration coupling modeling method
ActiveCN120874357ASustainable transportationDesign optimisation/simulationTemperature responseDynamic models
The invention provides a rotary table bearing-torque motor thermal vibration coupling modeling method, and relates to the technical field of machine tool reliability analysis. Comprising the steps of calculating bearing restoring force, torque and elastic rigidity; giving a dynamic balance equation of the main shaft system; unbalanced magnetic pulling force and unbalanced mass excitation are calculated; a displacement field is solved, and load changes caused by the displacement field are transmitted to the thermal model; the contact force borne by the bearing is updated by considering the load effect related to displacement, and the friction heat generation of the bearing and the heat generation of each part of the motor are calculated; calculating thermal deformation and thermal displacement of the bearing; thermal resistance among nodes is calculated, and a temperature field equilibrium equation is given through a thermal resistance network to achieve rapid thermal-mechanical coupling analysis; the thermal equilibrium equation is solved to calculate temperature response; importing the latest temperature into the kinetic model; lubricating grease viscosity and bearing thermal deformation are updated; and repeating the steps to finally obtain the main shaft displacement field and temperature field response. The method is high in accuracy, high in universality, low in test cost and high in test efficiency.
Owner:NORTHEASTERN UNIV CHINA
System and method for testing shearing resistance of anchoring structural plane under hydrodynamic coupling
ActiveCN120522001AWeather/light/corrosion resistanceMaterial strength using steady shearing forcesPull forceClassical mechanics
The invention provides a system and method for testing the shear resistance of an anchoring structural plane under water-force coupling, and the system comprises a prestress loading device which provides a prestress for an anchoring body sample, so that the structural plane is provided with a water flow channel with controllable opening degree; the shearing device is used for applying shearing force to the anchoring body sample to enable the structural surface to slide so as to damage the mortar protective layer; the high-pressure corrosion device is used for providing an osmotic pressure environment for the anchoring body sample so that a corrosion solution permeates into the structural surface to corrode the anchor cable, and the data acquisition device is used for monitoring sliding displacement, shearing force, pulling force, water pressure and ion concentration of the structural surface; the anchor cable corrosion damage coefficient calculation device is used for obtaining an anchor cable corrosion damage coefficient in the anchoring structure surface; the residual shear strength calculating device is used for obtaining the residual shear strength of the anchored structural surface after corrosion; and the anchoring body safety evaluation device is used for evaluating the safety state of the anchoring body. The method solves the problem of testing the residual shear strength of the anchoring structural surface considering the corrosion damage of the anchor cable under the synergistic effect of multiple factors.
Owner:CHANGJIANG RIVER SCI RES INST CHANGJIANG WATER RESOURCES COMMISSION
Detection device and detection method for automobile exterior trimming part assembly
The invention relates to the technical field of insertion and extraction force testing, and discloses a detection device and method for automobile exterior trimming part assembling, and the device comprises a bottom frame, a tension testing assembly, a vibration mechanism, and an extrusion mechanism, the vibration mechanism comprises a gear-missing column, a moving plate, a first electric push rod, a placing plate, and a vibration spring, and the bottom frame is provided with a sliding groove. The moving plate is slidably connected into the sliding groove, the first electric push rod is fixedly installed in the sliding groove, the output end of the first electric push rod is fixedly connected with the side wall of one end of the moving plate, one end of the vibration spring is fixedly connected to the bottom frame, the placing plate is fixedly connected to the other end of the vibration spring, and a mounting block is arranged on the bottom frame. According to the device, the vibration mechanism and the extrusion mechanism are matched, so that the bumper support on the placement plate continuously shakes, various road surface vibrations borne by an automobile in the driving process are simulated, and the reliability of the buckle under long-term vibration is accurately evaluated.
Owner:HEFEI KONA IND & TRADE CO LTD
Welding equipment for low guide vane spiral drill rod
The invention relates to the technical field of spiral drill rod production, and discloses welding equipment for a low guide vane spiral drill rod, which comprises a welding machine tool for the spiral drill rod, a spindle box is arranged on the welding machine tool for the spiral drill rod, a tailstock is arranged on the welding machine tool for the spiral drill rod, and chucks are arranged on the spindle box and the tailstock. The spiral blade can be screwed to be loosened and locked on the drill rod under the reverse control of the two adjusting motors, so that the tightness of the spiral blade on the drill rod can be effectively adjusted, the welding surface can be more tightly attached to the drill rod by adjusting the tightness of the spiral blade, the welding defects such as air holes and slag inclusion are reduced, and the welding quality of the drill rod is improved. Therefore, the welding strength is greatly improved, the improvement of the welding strength means the enhancement of the overall performance of the drill rod, in the drilling process, the drill rod with high welding strength can bear larger torque and tension, the downtime caused by breakage or falling of the drill rod is shortened, and the drilling efficiency is improved.
Owner:XIANGCHENG SHUANGYU MINING MACHINERY CO LTD
A sway-reducing and stabilizing device for crane sling
The present invention relates to the field of crane equipment, and in particular to a sway reduction and stabilization device for a crane hoist. In view of the problem in the prior art that a steel wire rope will inevitably shake during the speed regulation of a trolley, a sway reduction and stabilization device for a crane hoist is provided. Two first auxiliary ropes that are cross-arranged with each other are respectively arranged on the front and rear sides between a stabilization plate and a mounting plate. The lower ends of the first auxiliary ropes are respectively fixedly connected to fixed plates. When the crane trolley drives the hoist to move, the fixed plates are pulled mutually by the first auxiliary ropes that are cross-arranged with each other. Under the action of a two-way ratchet self-locking structure, while ensuring that the first auxiliary rope can be retracted and released by a first winding wheel, the pulling force from the first auxiliary rope cannot drive the first winding wheel to rotate, so that the first auxiliary rope can effectively maintain traction, reduce the shaking of the hoist during movement, and enhance the stability of the hoist during movement.
Owner:HENAN DAFANG HEAVY MACHINERY
Adjusting device for steel structure welding
PendingCN120362868AWelding/cutting auxillary devicesAuxillary welding devicesPull forceTorsion spring
The invention relates to the technical field of welding equipment, in particular to an adjusting device for steel structure welding. Comprising a base, a clamp is installed on the base, the device further comprises a measuring mechanism, the measuring mechanism comprises a U-shaped plate, the clamp is installed on the top face of the U-shaped plate, the U-shaped plate is arranged on the upper side of the base, a swing frame is hinged to the front side of the U-shaped plate, a first torsion spring is arranged between the swing frame and the U-shaped plate, a rectangular plate is fixedly connected to the top of the swing frame, and a universal shaft is fixedly connected to one side of the rectangular plate. According to the invention, through the design of the measuring mechanism, in the process of placing the I-shaped steel, the inclined surface of the I-shaped steel is contacted with and extrudes the rear side surface of the contact plate, so that the contact plate can rotate by taking the joint of the universal shaft as the circle center, and tension or thrust is applied to the telescopic ends of the first telescopic rod and the second telescopic rod; therefore, the inclined plane of the I-shaped steel is measured, the angle of the I-shaped steel can be adjusted subsequently, and the I-shaped steel can be welded more conveniently.
Owner:XUZHOU YUFU MACHINERY TECHNOLOGY CO LTD
Tension hydraulic compensation adjusting mechanism based on strip steel coiling
The utility model discloses a tension hydraulic compensation adjusting mechanism based on strip steel coiling, and relates to the technical field of strip steel coiling. Comprising a mounting plate, three guide rollers arranged side by side are arranged at the upper end of the front face of the mounting plate, a linear empty groove is formed in the other side of the mounting plate, and an adjusting roller is arranged in the linear empty groove; the clamping assembly is located between the two front guide rollers; and the tension compensation assembly is arranged on the other side of the back surface of the mounting plate. A grating ruler is connected to a first protruding plate at one end of a movable plate, a hydraulic rod is arranged on the back face of a mounting plate, the hydraulic rod is matched with a second protruding plate through a pull block on an output shaft of the hydraulic rod to drive the movable plate to move downwards, an adjusting roller can be driven to move downwards when the tension of a spring is insufficient, and the tension of the adjusting roller is compensated; and the situation that the steel belt is loosened due to insufficient tension is avoided.
Owner:HANGZHOU XIAOSHAN QIANHONG TRANSPORT MATERIAL
Spring steel wire tension detection device capable of being quickly disassembled and assembled
The invention provides a spring steel wire tension detection device capable of being quickly disassembled and assembled, which belongs to the technical field of steel wire detection and comprises a tensile machine, a buffer mechanism, a fixing mechanism, a locking mechanism and a triggering mechanism. The tensile machine comprises two clamps, and each clamp comprises a buffer mechanism arranged on the tensile machine and used for providing buffer force for a spring steel wire; the fixing mechanism is connected with the buffering mechanism, and the fixing mechanism is matched with the buffering mechanism to clamp and fix the spring steel wire; the locking mechanism is arranged on the buffering mechanism, and the fixing mechanism is limited and locked by the locking mechanism; and the triggering mechanism is arranged on the buffering mechanism, and the buffering mechanism triggers the triggering mechanism to move so as to relieve limiting of the locking mechanism to the fixing mechanism. According to the device, limiting can be automatically relieved after the spring steel wire is broken, an operator does not need to manually conduct complex unlocking operation, the spring steel wire can be rapidly pulled away, rapid dismounting of the spring steel wire is achieved, and the working efficiency is remarkably improved.
Owner:JIANGXI HUALI METAL PROD CO LTD
Swim and water activity training and assistance system and method
PCT designated stage expiredWO2025090399A1Cast linesMuscle exercising devicesPhysical medicine and rehabilitationPull force
Typically, for new swim students, the most critical prerequisite towards swimming is overcoming the fear of sinking when starting to learn how to swim, by gaining selfconfidence, reducing fear, relaxing their bodies, and getting buoyant on water. Accordingly, a swim and water activity training and assistance apparatus, comprising: an anchoring device configured to support a pulling force exerted by a player in a swimming pool, the anchoring device having a proximal end, and a base affixed to an anchorage neighboring to the swimming pool; a pulling device having a first end affixed to the proximal end of the anchoring device, a second end, and at least a rescue point between the first end and the second end inclusive configured to support a grasping and the pulling force exerted by the player while in the swimming pool is disclosed.
Owner:LI XIANG
Limiting device for lifting rope of crane
The utility model discloses a crane lifting rope limiting device in the technical field of crane lifting hooks, which comprises an anti-falling mechanism, the anti-falling mechanism comprises a hook, the hook comprises a connecting end and a hook body, the tail end of the hook body is fixedly connected with the lower end of the connecting end, an assembly groove is formed in the hook in a penetrating manner, a winding disc is rotatably arranged in the assembly groove, and the winding disc is fixedly connected with the hook body. A rotating shaft is movably inserted into the winding disc, the two ends of the rotating shaft are sleeved with anti-disengaging pieces, the head end of the hook body is fixedly connected with a limiting block, and the ends, away from the rotating shaft, of the anti-disengaging pieces abut against the limiting block. The limiting mechanism comprises a torsional spring arranged on the winding disc in a sleeving manner; during use, when the torsion spring drives the winding disc and the anti-disengaging piece to deflect upwards, a steel cable is unwound, at the moment, the limiting piece loses tension, meanwhile, the limiting piece is pushed to move upwards through the first spring, at the moment, the lifting rope is conveniently limited through the limiting piece, the possibility that the lifting rope continuously shakes in the hook body is reduced, and the lifting rope is more convenient to limit.
Owner:ZHEJIANG ZHEXING MASCH MFG CO LTD
Bolt guarantee load measuring method based on ultrasonic waves
PendingCN120467839AUsing subsonic/sonic/ultrasonic vibration meansMaterial strength using tensile/compressive forcesPull forceQuality control
The invention discloses a bolt guarantee load testing method based on ultrasonic waves, which comprises the following steps: pasting a ceramic patch on the head of a bolt, and measuring the length change of the bolt before and after loading by using the ultrasonic waves to judge whether the bolt meets the guarantee load requirement, and comprises the following steps: firstly, measuring the initial length L0 of the bolt; a guarantee load is applied according to the GB / T3098.1 standard and kept for 15 seconds, the length L1 of the bolt is measured again after unloading, and if the difference value of L1 and L0 is within the range of + / -5 microns, the bolt is judged to be qualified; otherwise, increasing 3% of the load for retesting; according to the method, the contact error of traditional mechanical measurement is avoided, the measurement precision is improved, and a more accurate and convenient technical means is provided for quality control of high-requirement fasteners.
Owner:ZHOUSHAN 7412 FACTORY
High-precision six-dimensional force sensor calibration device and calibration method
PendingCN121207415AForce/torque/work measurement apparatus calibration/testingPull forceComputational physics
The invention relates to the technical field of six-dimensional force sensor calibration, in particular to a high-precision six-dimensional force sensor calibration device and calibration method. The invention provides a high-precision six-dimensional force sensor calibration device which comprises a base, a calibration platform, a cross force application frame, an S-shaped tension sensor and a fixed pulley. The calibration platform is arranged on the base and is used for fixing the six-dimensional force sensor; the center point of the cross force application frame is connected to the six-dimensional force sensor, a plurality of fixed pulleys are arranged on the calibration platform, a plurality of S-shaped tension sensors are arranged on the cross force application frame, and loads are applied to the S-shaped tension sensors or directly applied to the cross force application frame through connection of a weight set and a rope and guidance of the fixed pulleys. Therefore, a single-dimensional force, a single-dimensional torque, a composite force or a composite torque is applied to the six-dimensional force sensor. Accurate loading of the six-dimensional force sensor is achieved, the device is simple in structure and convenient to operate, independent calibration of single-dimensional force / torque can be achieved, and combined loading can also be conducted.
Owner:SHENZHEN CHUANSI TECH CO LTD
All-parameterized prestressed steel beam model construction method and system
The invention relates to the technical field of prestressed structures, in particular to a fully parameterized prestressed steel beam model construction method and system.The fully parameterized prestressed steel beam model construction method comprises the following steps that stage vertical displacement data are obtained, abnormal values are screened out, a stage data set is obtained, node data are selected according to the steel beam path relation, and differences are calculated and sorted; the method comprises the steps of dynamically monitoring node displacement, correcting node tension values in combination with friction resistance and anchorage device slippage, screening support node abnormity, finely adjusting node positions, extracting temperature data, adjusting node tension parameters and obtaining a full-parameterization steel beam layout data set, and in the method, node displacement is dynamically monitored, the displacement difference of starting and ending nodes of a steel beam path is adjusted, node tension force is corrected in real time, and a full-parameterization steel beam layout data set is obtained. And a full-parameterization steel beam layout data set is obtained by combining the support node displacement and the temperature change and optimizing the tension parameters, so that the structure is matched with the dynamic change in the construction process, and the adaptability and the long-term reliability of the structure are enhanced.
Owner:CHINA RAILWAY MAJOR BRIDGE RECONNAISSANCE & DESIGN INSTITUTE CO LTD +1
Bonding wire push-pull force detection machine and detection method for bonding wire push-pull force
The invention relates to the technical field of chip welding strength detection, and discloses a welding wire push-pull force detection machine and a detection method for welding wire push-pull force, the welding wire push-pull force detection machine comprises a rack, a test bin, a clamp, a test disc, a speed reduction control mechanism and an elastic force reversing transmission mechanism, the test bin can vertically ascend and descend relative to the rack, and the clamp can horizontally move relative to the rack; the test disc and the speed reduction control mechanism are both mounted in the test bin; according to the welding wire push-pull force detection machine, through cooperation of the speed reduction control mechanism and the elastic force reversing transmission mechanism, when the test bin moves downwards, the contact plate firstly makes contact with the clamp, and the induction assembly monitors the position of the contact plate so as to reduce the descending speed of the test bin; the lever pushes the reset spring to stretch to the maximum length and then automatically shrinks, and the contact plate is pulled to move upwards to be separated from the clamp. An additional control structure is not needed, the contact plate is prevented from hindering detection, the problem that the testing head moves downwards rapidly and is prone to collision is solved, and smooth detection is guaranteed.
Owner:SHENZHEN SUIJING AUTO ELECTRONICS CO LTD
Upward-pulling formwork erecting construction method for concrete cantilever structure
PendingCN121024304AForms/shuttering/falseworksAuxillary members of forms/shuttering/falseworksPull forceArchitectural engineering
The invention discloses a concrete cantilever structure pull-up formwork construction method which is characterized by comprising the following steps: load calculation and component model selection; pre-burying the U-shaped bolts; pre-burying the upper-section pull rod; i-shaped steel end connecting plates are welded, and double-layer angle steel connecting plates are welded to the cantilever ends of the I-shaped steel; i-shaped steel cantilever girders are installed; assembling a pull rod system; the pull rods are fastened and leveled with a system, the two pull rods are synchronously fastened, the double rods are ensured to simultaneously advance and retreat during adjustment of an adjusting device, and a level gauge is used for observation and leveling after initial adjustment; the formwork frame and the safety enclosure are installed; pull rod pre-tensioning and deflection monitoring are carried out, pre-tension force is applied through an adjusting device, the deflection of the cantilever end is detected, monitoring points are arranged, and a deformation early warning mechanism is established; regulating and controlling concrete pouring; and removing the mold and recycling. The overhanging structure is high in anti-overturning capacity and suitable for large-span and special-shaped overhanging structures, and the safety is remarkably improved.
Owner:CHINA MCC20 GRP CORP LTD
Safety belt tension testing device and use method
The invention relates to the technical field of safety belts, in particular to a safety belt tension testing device and a using method.The safety belt tension testing device comprises a device base, the top surface of the device base is fixedly connected with a hinge mounting seat, and the top surface of the device base is fixedly connected with a belt wheel mounting seat; an air cylinder supporting frame is fixedly connected to the surface of the top of the device base, a driving air cylinder is fixedly connected to the surface of the inner side of the air cylinder supporting frame, an inner mounting shell is fixedly connected to the surface of the top of the device base, and a clamping jaw limiting groove is formed in the surface of the top of the inner mounting shell. A belt passing groove is formed in the surface of the outer side of the inner mounting shell, a clamping jaw expansion mechanism is arranged at the output end of the driving air cylinder, a clamping jaw clamping mechanism is arranged on the surface of the outer side of the clamping jaw expansion mechanism, and an expansion limiting mechanism is arranged on the surface of the top of the inner mounting shell; and an equidistant conveying mechanism is arranged on the surface of the top of the belt wheel mounting seat.
Owner:BINZHOU XIANGLIANG CHEM FIBER CO LTD
Wire and cable winding device
Owner:ANHUI CABLE
Hemostasis device
The invention relates to the technical field of hemostasis, and discloses a hemostasis device which comprises a tourniquet, a device bin is installed on the tourniquet, a winding shaft is installed in the device bin, two elastic belts are installed on the winding shaft, the ends of the two elastic belts are fixedly connected with the inner walls of the two ends of the tourniquet respectively, and a guide cylinder is fixedly installed on the winding shaft. According to the hemostasis device, the mechanical timing device is used for driving the rotating cylinder to wind the elastic rope, the first magnetic ring is attracted by the magnetic force of the second magnetic ring to drive one end of the elastic rope to move upwards in the rotary knob, and when the rotating shaft and the rotating cylinder are not reset completely, the elastic rope is pulled, so that the elastic rope is wound, and the hemostasis effect is achieved. When the elastic rope is stretched to a certain degree, the pulling force borne by the first magnetic ring is larger than the magnetic attraction force exerted on the first magnetic ring by the second magnetic ring, the first magnetic ring is downwards aligned with the magnetic shaft, the magnetic shaft retracts into the rotary knob, the rotary knob moves upwards to reset, the elastic belt is not rolled any more, and the relaxation time of the tourniquet is effectively adjusted according to the limb bleeding degree of a patient.
Owner:THE SIXTH MEDICAL CENT OF THE CHINESE PEOPLES LIBERATION ARMY GENERAL HOSPITAL
Drilling and cutting device for computer case
The invention belongs to the technical field of computer production, and discloses a computer case drilling and cutting device which comprises a support, a hydraulic cylinder, a conveying roller, a plate and a transverse frame, and further comprises punch mechanisms arranged at the bottom of the transverse frame at equal intervals; the supporting cylinders are fixedly connected to the bottom of the support at equal intervals; and the bearing of the inner cylinder is connected into the supporting cylinder. According to the scheme, the hydraulic cylinder is operated to enable the transverse frame to push the punch mechanism to move downwards to punch a plate, then the bottom of the punch mechanism makes contact with the supporting plate body through punching waste and extrudes the supporting plate body to move downwards, and therefore the shaft body drives the bottom of the tension piece to move downwards, and a tool bit makes contact with the edge of the bottom of a punched hole in the plate; and the shaft body can move along the guide groove, and at the moment, the shaft body can force the inner cylinder to rotate, so that the scraper and the tool bit rotate to cut and chamfer the bottom of a punched hole, and the situation that the edge of the bottom of the plate protrudes when the plate is punched is avoided.
Owner:DEZHOU UNIV
Ceiling clothes airing machine test equipment
The utility model provides a test device for a ceiling clothes airing machine. The test device comprises a rack; the left test pull rope is used as a test pull rope for providing vertical upward pulling force for the first airing rod steel wire rope; the right test pull rope is used as a test pull rope for providing vertical upward pulling force for the second airing rod steel wire rope; the two ends of the cross rod are detachably connected with the wire outlet tail end of the first airing rod steel wire rope and the wire outlet tail end of the second airing rod steel wire rope respectively during testing; the two end parts of the cross rod are fixedly connected with one end part of the left test pull rope and one end part of the right test pull rope respectively; the pre-mounting piece device is used for providing vertically upward pulling force for the cross rod through the gravity of the pre-mounting piece device; the weighted mounting piece device is used for carrying out load pressing on the pre-mounting piece device during testing; and the lifting assembly is used for lifting and lifting the weight-increasing mounting piece device. According to the utility model, the steel wire rope of the suspended ceiling clothes airing machine can be accurately and efficiently detected in a load-bearing state in a manpower-saving manner.
Owner:GUANGDONG HOTATA TECH GRP
Intelligent tensioning method for reinforcing bridge pier surface cracks through annular prestressed steel wire ropes
The invention discloses an intelligent tensioning method and system for surface cracks of an annular prestressed steel wire rope reinforced bridge pier, and the method comprises the steps: carrying out the image recognition based on a collected image, and obtaining the stress data of all marking points of a steel wire rope and bridge pier concrete; acquiring actual tension end control stress of each stage of the steel wire rope; obtaining a formula between the control stress of the tensioning end of the steel wire rope and the stress of each mark point, wherein the formula contains parameters to be solved; fitting an actual value of a to-be-solved parameter in the formula; and on the basis of a known formula of the parameters to be solved, the final tension end control stress is calculated according to the reinforcement requirement of the concrete at the mark point. The intelligent tensioning method is provided by combining field strain monitoring, a dynamic reinforcing stress calculation method and an automatic tensioning control device, the actual reinforcing stress is determined, the tensioning force is controlled based on the reinforcing effect, and the actual reinforcing effect is effectively evaluated.
Owner:ANHUI TRANSPORTATION HLDG GRP CO LTD