14383 results about "Pulley" patented technology

A cutting device includes a base plate, a motor attached to the base plate, a driving cord including a first end and a second end, the first end being attached to the motor, and a cutting assembly. The cutting assembly includes a fixed blade that is fixed to the base plate, and a driven blade that moves with respect to the fixed blade. The second end of the driving cord is attached to the driven blade to move the driven blade with respect to the fixed blade when the motor rotates.

The invention relates to the technical field of railway catenary monitoring, in particular to a multi-source sensing fusion method and system for state evaluation of a catenary compensation device, and the method comprises the steps: obtaining multi-source sensing data such as vibration, temperature and current, generating a phase space trajectory through employing a self-adaptive phase space reconstruction technology, and carrying out the state evaluation of the catenary compensation device; multiple topological features are extracted to form topological feature vectors, and the vectors are combined with temperature and current data to construct a fault probability model. According to the method, the health degree score of the contact network compensation device can be calculated, trend prediction can be carried out, early warning information can be generated, high-precision early warning is realized, the clamping stagnation risk of the pulley block can be predicted three months in advance, passive response is converted into active prevention, the maintenance efficiency and safety of the contact network are remarkably improved, and the maintenance cost is reduced. By means of the innovative technology, the safety of railway operation is improved, the maintenance cost is reduced, and revolutionary transformation is brought to the railway industry.

The invention relates to the technical field of non-metal waste treatment, in particular to recycling equipment for plastic defective products. In order to solve the problem that when a pipe rolls during crushing, the residence time of materials in a crushing cavity is prolonged, and the crushing efficiency is low. Comprising a bottom frame, a crushing shell is fixedly connected to the bottom frame, a connecting and guiding shell is fixedly connected to the crushing shell, a crushing roller set is arranged in the crushing shell, a motor is fixedly connected to the bottom frame, transmission is conducted between an output shaft of the motor and the crushing roller set through a belt wheel and a belt, extrusion rollers distributed in a mirror image mode are rotationally connected to the crushing shell, and the extrusion rollers are connected to the crushing shell. And the extrusion rollers in mirror image distribution are in transmission through a gear set. According to the pipe crushing device, a pipe is pre-compressed in advance through the extrusion rollers when the pipe is crushed, a cylindrical pipe is compressed into an elliptic cylindrical pipe, then vertical feeding crushing is conducted, the rolling probability of the pipe during crushing is reduced, and the crushing efficiency of the pipe is improved.

The invention relates to the technical field of spiral finned tube laser welding, in particular to a solid spinning spiral finned tube laser welding machine. Comprising a first base and a second base, a threaded rod is rotationally connected between the first base and the second base, and the threaded rod is in threaded connection with a machining assembly; the first motor drives the driving belt wheel to rotate, so that the machining assembly conducts welding operation of the spiral fins on the surface of the base tube while moving, and through the transmission relation between the driving belt wheel and the driven belt wheel, the base tube synchronously rotates while the machining assembly conducts moving machining; according to the spiral finned tube machining device, the machining assembly is arranged to meet the welding requirement of the spiral finned tube, movement of the machining assembly and rotation of the base tube are controlled at the same time through the same driving structure, the stability and consistency in the machining process are improved, the machining speed can be adjusted more conveniently, fin welding is more uniform, and the welding quality is effectively improved.

A truck bed mounted carrier system includes a frame assembly installable in a truck bed with lateral supports and outer main supports, inner supports that slide within the outer main supports, a center outer support, and a second inner support that slides within the center outer support. A carrier frame coupled to the frame assembly extends from and retracts into the truck bed, supported by radius supports that provide structural integrity when extended. The system features a pulley assist mechanism with gas springs that creates a counterbalance force, a mechanical drive assembly with sprocket and roller chain for movement control, and deployable transport stands for ground support during loading operations. Adjustable bed rail struts with locking mechanisms secure the system to the truck bed without permanent modification. Low-friction materials and strategically positioned slides ensure smooth operation throughout the extension and retraction cycles.

A power-assisted fitness exercise equipment includes a frame, a thrust training mechanism and a tension training mechanism; wherein the thrust training mechanism is connected to the frame and is used for bodybuilders to perform vertical thrust training; wherein the tension training mechanism is connected to the frame and is used for bodybuilders to perform tension training. The tension training mechanism further includes two sets of counterweights, two sets of pulley components and two sets of pulling wires, which features multiple functions, enabling multiple people to train at the same time or satisfying the needs of bodybuilders to perform different training to enhance technical effect of fitness experience.

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.

The swimming training machine is a stool-shaped frame with a hand crank and a weight bearing shaft in the middle; a mobile phone holder, a baffle plate for controlling sight, a counter and a spring rod are arranged in front of the head, and the spring rod is used for training the paddling function of the hand by hand crank pressure; during training, a person lies under the stool, a heavy object is placed on the belly, the belly is expanded by sucking air through the mouth, the baffle rod is rotated by an angle through the pulley arranged on the weight supporting shaft, and the person can see the mobile phone and the counter and can rotate the crank to count the counter; belly inflation can be trained continuously through mental support from the mobile phone and the counter, people are trained into people with enough floating force and hands with water skiing force as time goes, and people can float and swim in water; the swimming pool can be placed in a rectangle below the modified combined bed, four corners of the swimming pool are chamfered to bed legs, and the length, the width and the height of the swimming pool are 2000, 900 and 500 for saving so as to be suitable for individuals; a pressure sensor is arranged on the side of the egg-shaped swimming mouth, and the swimming function of a person is calculated.

An on-load tap-changer includes: a tap-changer body and a driving mechanism fixed on the tap-changer body. The tap-changer body includes a housing, multiple insulation fixing plates, multiple turntables, each of which includes a sheave and a cam plate, the cam plate of which is rotatably connected to the insulation fixing plate, and the sheave of which is connected to the driving mechanism, multiple vacuum tubes fixed on the multiple insulation fixing plates, and multiple transmission mechanisms, each of which includes a lifting lever and a reverse spring. When the driving mechanism drives the sheave to regulate voltage, the cam plate is synchronously driven to rotate, and then the vacuum tube is driven by the lifting lever and the reverse spring to achieve on / off arc extinction, thereby achieving on-load voltage regulation.

The invention particularly relates to an underground ventilation system, and belongs to the technical field of ventilation. The underground ventilation system comprises an air duct and a plurality of sliding rail assemblies. Each sliding rail assembly comprises a sliding rail part, a sliding part and a guide ring, the sliding rail parts of the multiple sliding rail assemblies are in butt joint in sequence, guide grooves are formed in the left side and the right side of each sliding rail part respectively, the guide grooves penetrate through the sliding rail parts in the length direction of the sliding rail parts, each sliding part comprises two oppositely-arranged wall parts, the sliding rail parts are arranged between the two wall parts, and the wall parts are rotationally connected with pulleys. The pulley is contained in the guide groove, and the guide ring is arranged corresponding to the sliding part and connected to the sliding part. The air channel sequentially penetrates through the guide rings. The system has the advantage that the air duct position is convenient to adjust.

The invention relates to the technical field of continuum robot control, in particular to an under-actuated active and passive cooperative control device for a continuum robot. The two sections of mechanical arms are connected in a staggered mode to form two sections of continuous mechanical arms moving independently, each mechanical arm is provided with a plurality of bending units which are sequentially connected in the same position, the pre-tightening compensation mechanism is installed on the core body in the circumferential direction, the under-actuated control mechanism is installed on the installation disc, and the first rope is connected with the mechanical arms and the rope fixing plate; one end of the second rope is connected with the mechanical arm, and the other end of the second rope sequentially penetrates through the mechanical arm, the pre-tightening compensation mechanism and the first positioning wheel assembly and then is connected with the rope fixing plate to form a tension compensation loop for the first rope. The two-section continuum structural design is adopted, kinematics dimension reduction is achieved, and the multi-direction bending capacity can be achieved in a narrow space through bionic optimization. A combined type pre-tightening mechanism with a spring and a pulley combined is adopted, rope deformation is passively compensated through an elastic element, and dynamic tension maintaining is achieved.

The invention belongs to the technical field of low-voltage switch cabinets, and particularly relates to a low-voltage switch cabinet with a good on-off effect, which comprises a cabinet body, an exhaust cavity formed at the bottom of the cabinet body, an air exhaust box fixedly mounted at the top of the cabinet body, a filter screen plate mounted on the side wall of the air exhaust box, a plurality of drawers slidably connected in the cabinet body, and an auxiliary heat dissipation box fixedly connected to the back of the cabinet body. When a second motor drives a rotating shaft to rotate to adjust the position of a movable seat, the rotating shaft rotates to drive a linkage shaft to rotate through a belt ring and a belt pulley, the linkage shaft is meshed with one transmission shaft through a bevel gear, and therefore when the rotating shaft rotates, the annular dehumidification net can be driven to rotate through the transmission shaft; and the position of a drying agent arranged in the annular dehumidification net is adjusted, so that the dehumidification effect is improved, and the problems that air with relatively high humidity enters the cabinet body, easily corrodes electrical components and seriously affects the on-off effect of the electrical components are solved as much as possible.

The invention relates to a window regulator assembly (1) of a vehicle, wherein the window regulator assembly (1) comprises a carrier element (2), wherein at least one pulley arrangement (3) for redirecting a cable (4) is mounted at the carrier element (2), wherein the pulley arrangement (3) comprises a pulley (5) which is arranged rotatable on a pulley shaft (6), which is mounted on the carrier element (2), wherein the pulley shaft (6) has a shaft end section (8) at one axial end, which shaft end section (8) is connected to the carrier element (2). To design such a window regulator assembly in such a way that fewer components are required and a simpler assembly process is possible, the invention suggests that the pulley arrangement (3) comprises a pulley interface (9) for receiving the pulley shaft (6), which is connected to the carrier element (2), wherein the pulley interface (9) comprises at least one snap fit tab (10, 10', 10") at an end section, wherein the snap fit tab (10, 10', 10") is elastically in a radial direction (r), wherein the shaft end section (8) is enlarged in diameter compared with an adjacent shaft section (11), wherein a snap fit tab (10, 10', 10") is elastically engaged into the adjacent shaft section (11) to establish an undercut in axial direction (a) and a snap fit tab (10, 10', 10") establishes an axial (a) pressing force onto the shaft end section (8).

The invention relates to the technical field of photovoltaic panel welding, in particular to a workpiece feeding device of a bus bar welding machine, which comprises two fixing frames, feeding devices, a supporting device and a pushing device, the uniformly distributed feeding devices are mounted at the top of the fixing frames, the supporting device is arranged between the two fixing frames, and the pushing device is mounted on the top of the fixing frames. The device comprises a fixed frame, a driving motor, a driving shaft, a mounting frame, a fixed plate, a driving belt pulley, a driven belt pulley, a belt main body, a fixed shell, a supporting shell, a supporting wheel, a limiting plate, a threaded rod, a nut, a limiting rod, a rubber ring, a pushing spring and a dismounting main body, the driving belt wheel, the belt main body and the driven belt wheel can be driven to rotate through the driving motor and the driving shaft, the belt main body is attached to the supporting wheel so as to support the belt main body, the belt main body can be attached to the photovoltaic module all the time, and stable feeding of the photovoltaic module is guaranteed.

The anti-falling overspeed protection device comprises the cargo carrying table and a guide seat, safety tongs are arranged on the cargo carrying table, the safety tongs are connected with a safety tongs connecting plate, and the safety tongs connecting plate is fixedly connected with a connecting rod and an overspeed connecting rod; the overspeed connecting rod is fixedly connected with the middle of the safety gear connecting plate, one end of the overspeed connecting rod is hinged to the cargo carrying table mounting plate, and the other end of the overspeed connecting rod is fixed to the overspeed protection steel wire rope. The upper end of the compression rod penetrates through the supporting spring and is fixed at the lower end of the guide seat through a locking nut; a guide rod is further fixed to the lower end of the guide seat through a nut, the guide rod penetrates through the spring support and the compression spring, a pulley shaft penetrates through the upper end of the guide seat, and the pulley shaft further penetrates through the pulley and the pulley bearing and is fixed to the pulley mounting plate through an end cover. The safety protection device is used for safety protection when rope breaking, rope loosening or stalling and overspeed happen to the cargo carrying table of the stacking machine.

The utility model discloses a water depth adjusting device of a test pool, and relates to the technical field of deepwater test pools. Comprising a floating bottom body, a lifting mechanism, a jacking device and a distributed detachable platform, each lifting mechanism comprises a winch, a steering pulley and a steel wire rope, one end of the steel wire rope is connected with the winch, and the other end of the steel wire rope bypasses the steering pulley at the bottom of the deepwater experiment pool and is connected with the floating bottom body; the jacking device comprises an air cylinder, a connecting shaft, a guide wheel and a base, the air cylinder located on the base is connected with the guide wheel through the connecting shaft, and the guide wheel is connected with the guide sliding groove of the floating bottom body in a clamped mode; the jacking devices are symmetrically arranged on the two sides of the floating bottom body. The distributed detachable platform is laid on the floating bottom body through the connecting support. The device can meet the water depth requirement in an ocean engineering experiment, meet the ground elevation requirement in a civil engineering experiment and a wind tunnel experiment, and meet the requirement that the floating bottom does not move, rotate or get stuck in the operation process of experimental equipment.

The invention relates to an automatic door opening and closing mechanism, door box equipment and an automatic door opening and closing method, which can realize full-angle automatic door opening and closing, improve user experience and improve safety performance. The automatic door opening and closing mechanism comprises a hinge assembly and a door closing assembly, wherein the hinge assembly comprises a hinge base, a hinge bracket, a rotating shaft for rotatably connecting the hinge bracket to the hinge base and a hinge pulley arranged on the hinge bracket; the elastic driving assembly comprises a pull rope bypassing the hinge pulley, a driving motor connected with one end of the pull rope, and an elastic piece connected with the other end of the pull rope, so that tension torque opposite to the gravity torque of the door body assembly in direction is applied to the door body assembly through the pull rope; when the pull rope is driven by the driving motor to be tightened, the tension moment applied by the pull rope is increased to be larger than the gravity moment, and the door is automatically closed; and when the pull rope is loosened under the driving of the driving motor, the tension moment applied by the pull rope is reduced to be smaller than the gravity moment, and the door is automatically opened.

The invention discloses a contact network wire straightness monitoring device, belongs to the technical field of straightness monitoring, and provides the following scheme that the contact network wire straightness monitoring device comprises a straightness monitoring mechanism, an auxiliary mechanism is arranged on the straightness monitoring mechanism, the straightness monitoring mechanism comprises a supporting plate, and monitoring equipment is arranged on the supporting plate; according to the invention, translation detection is carried out on the wire through the straightness monitoring mechanism, and during conventional detection, the lower pulley drives the shaft disc to drive the piston assembly to move, so that the rolling ball can slide in the rail groove, rotation of the rotating rail is realized, the detection assembly can carry out comprehensive detection around the circumferential direction of the wire, and the detection efficiency is improved in the detection process. On one hand, the position detection accuracy is improved through multi-dimensional detection data fusion, on the other hand, a conventional detection result is rechecked according to an omnibearing detection result and image data, when a flatness defect is recognized, a maintainer can visually confirm the shape and position of the defect through a corresponding image, and the problem of misjudgment or missed judgment is avoided.

The invention relates to a novel through type water static pressure groove grinding device and process. The device comprises a positioning tool; a grinding head seat; the grinding frame is connected with the grinding head seat; the driving device comprises a motor bottom plate mounted on the vertical plane of the grinding head seat, a driving motor mounted on the motor bottom plate, a main shaft of which the axis is vertical to the motor bottom plate and which is connected with the driving end of the driving motor, a belt pulley mounted at the end part of the main shaft, and a belt mounted on the belt pulley; the water hydrostatic bearing assembly comprises a water hydrostatic bearing seat mounted on the grinding head seat, a water hydrostatic bearing cover matched with the water hydrostatic bearing seat, a pin shaft inserted between the water hydrostatic bearing seat and a through hole of the water hydrostatic bearing cover and used for preventing rotation, and a radial bearing arranged on the pin shaft in a sleeving manner; the grinding wheel is installed on the outer diameter of the radial bearing, the belt is sleeved with a grinding wheel outer diameter groove, and the main shaft is in transmission connection with the grinding wheel through the belt wheel and the belt and used for driving the grinding wheel to rotate. Through type rough grinding and accurate grinding machining can be completed in sequence only through one-time clamping.

The invention provides a ribbon loom driven by horizontally opposed crankshafts, which comprises a base rack provided with a crankcase, a crankshaft driving assembly is arranged in the crankcase and drives a heald frame opening mechanism through a connecting rod, and a cloth tape winding mechanism, a weaving mechanism and a weft yarn feeding mechanism are further arranged above the crankcase. The crankshaft driving assembly comprises a rear crankshaft set and a front crankshaft set which are horizontally and oppositely arranged, a first synchronous wheel and a second synchronous wheel in the rear crankshaft set are connected through a rear main shaft piece, and a driving belt wheel is installed on a motor piece and connected with the first synchronous wheel through a first synchronous belt. The front crankshaft set and the rear crankshaft set are driven to rotate synchronously, all heald frame openings in the heald frame opening mechanism operate synchronously according to the preset opening rhythm, openings are formed through the heald frame set, the openings reach the weaving mechanism to be woven into cloth belts, and then the cloth belts are wound into a container through the winding mechanism. The vibration and noise of the machine are reduced, and the overall processing efficiency of the ribbon loom is improved.

The invention discloses a long-service-life composite heat treatment method for a harmonic reducer flexible gear made of an SNCM439 material, belongs to the technical field of long-service-life manufacturing of harmonic reducers, and solves the problem that the service life of the harmonic reducer flexible gear is short. According to the method, a flexible gear made of an SNCM439 material is subjected to a composite heat treatment method of secondary normalizing, quenching, deep cooling and tempering, and the specific process method is as follows: the primary normalizing temperature is 870-890 DEG C, the heat preservation time is 50-70 minutes, and air cooling is performed; the secondary normalizing temperature is 850-870 DEG C, the heat preservation time is 50-70 min, and air cooling is carried out; the quenching temperature is 830-850 DEG C, the heat preservation time is 50-70 min, and oil cooling is conducted; the subzero treatment temperature is-70 DEG C to-90 DEG C, and the heat preservation time is 110-120 min; the tempering temperature is 490-510 DEG C, and the heat preservation time is 120-140 minutes.

The invention provides an internal flow field balancing device for a magnetic transmission high-temperature and high-pressure closed container. Comprising a pulley, a transmission mechanism, a clutch, a turbulent flow mechanism, a frequency modulation motor and a magnetic transmission mechanism, a rotating cage is arranged on the pulley and is driven to rotate through a rotating mechanism; a tray is hung on the rotating cage, and an accommodating object is accommodated on the tray; the transmission mechanism is arranged at the closed end of the tank body; one end of the clutch is connected with the transmission mechanism; the turbulence mechanism is provided with a transmission shaft, blades and a driving gear are arranged at the extension end of the transmission shaft, the blades are used for adjusting airflow distribution in the tank body, and the driving gear is connected with the input end of the transmission mechanism and used for driving the transmission mechanism; the magnetic transmission mechanism is a non-contact coupling for transmitting torque through magnetic field force, is arranged in the middle of the outer side of the sealing head at the closed end of the tank body and transmits torque to the closed space of the tank body; the frequency modulation motor is connected with the magnetic transmission mechanism and used for driving the transmission shaft to rotate. Three flow field balancing modes are provided for use.

The present application generally relates to an exercise machine. The exercise machine comprises a body, a physical weight, an electromechanical resistance module, a pulley system attached to the body and a user interface. The physical weight provides a first resistance source for a first cable, while the electromechanical resistance module provides a second resistance source for a second cable. The pulley system is configured to integrate a resistance from the first and second resistance sources into a single output resistance by guiding the first cable and second cable to an adapter to which the first cable and the second cable are attached. The user interface is connected to the adapter and serves to apply a force against the single output resistance.

The invention relates to the technical field of ore particle screening, and discloses high-recovery-rate micro-fine-particle magnetite ore dressing equipment which comprises a mounting frame, a protective shell is fixedly mounted on the mounting frame, a screening assembly is arranged on the protective shell, and the screening assembly comprises a three-way pipe. In order to enable the high-recovery-rate micro-fine-particle magnetic iron ore preparation equipment to be suitable for efficient separation of high-added-value micro-fine-particle iron ore, the screening assembly is arranged, the screening assembly is matched with a power motor to drive a large belt wheel through a small belt wheel and a transmission belt, an output shaft drives an auger rod to push ore in a three-way pipe, feeding blockage is avoided, and the high-recovery-rate micro-fine-particle magnetic iron ore preparation equipment is suitable for efficient separation of high-added-value micro-fine-particle iron ore. And meanwhile, a centrifugal motor drives a trilateral frame to drive a centrifugal screen drum to rotate at a high speed, fine particles fall into a discharging hopper through screen holes by utilizing centrifugal force, and coarse particles are discharged from a first discharging pipe through a mounting drum. And the stirring paddle rotates synchronously to prevent the fine particles from accumulating in the funnel.

The invention relates to the technical field of cable stranding and winding, and discloses a high-speed stranding machine for cable production and a stranding method.The high-speed stranding machine comprises a stranding disc, a braiding machine and a take-up rack, a butt joint assembly is arranged outside the take-up rack and comprises a transverse plate installed on the side edge of the take-up rack, and an extension plate is arranged outside the transverse plate; a reciprocating assembly is arranged at the end, away from the transverse plate, of the extending plate and comprises a reciprocating screw rotationally connected to the lower portion of the outer surface of the extending plate, a frame is movably connected to the outer surface of the reciprocating screw, and a guide ring is arranged in the frame. When the cable is wound, the cable penetrates through the frame guide ring and then is fixed to the winding shaft, the belt wheel transmission part transmits rotation of the transmission rod to the reciprocating screw rod, so that the reciprocating screw rod drives the frame to do reciprocating linear motion and drives the cable to synchronously move, compact and regular arrangement of the cable on the surface of the winding shaft is achieved, and the problem of uneven distribution of traditional winding is solved; manual intervention is not needed, and uniformity and attractiveness are guaranteed.

The invention discloses a welding mistake proofing device for a new energy automobile welding part, and relates to the technical field of welding equipment. The laser welding device comprises a base, an adjusting ring is arranged on the top of the base, and a laser welding head is installed in the adjusting ring; a detection assembly is arranged at the top of the base and comprises a supporting shell installed on one side of the adjusting ring. Through the synergistic effect of the detection assembly and the adjusting assembly, real-time monitoring and angle dynamic adjustment of the fitting degree of two sets of pipeline workpieces are achieved, a pressure sensor can accurately recognize the eccentricity or dislocation problem during pipeline butt joint through pulley stress feedback, a driving motor is matched with a belt transmission system to drive an adjusting ring to rotate, and the fitting degree of the two sets of pipeline workpieces is adjusted. Compared with a traditional single-pipeline clamping device, the alignment problem during double-pipeline splicing is effectively solved, the problems of insufficient weld joint strength, poor sealing performance and the like caused by eccentricity are avoided, and the welding quality and the reliability of a new energy automobile pipeline system are remarkably improved.

The utility model discloses automatic wire drawing equipment. The automatic wire drawing equipment comprises a rack as well as a pay-off mechanism, a front guide wheel set, a wire lubricating system, a wire furnace, a mold furnace, a rear guide wheel set, a wire drawing mechanism, a tension speed measuring mechanism and a take-up mechanism which are sequentially arranged on the rack from left to right, the system further comprises a control system. The pay-off mechanism comprises a pay-off rack, and a pay-off wheel, a swing pulley, a buffer pulley, a pay-off speed measurement pulley and a guide pulley which are arranged on the pay-off rack; the pay-off wheel is connected with a pay-off servo motor; the front guide wheel set and the rear guide wheel set are each provided with a plurality of wire grooves. A wire drawing wheel of the wire drawing mechanism is a straight cylinder wheel; the tension speed measurement mechanism comprises a first guide pulley, a post-drawing speed measurement pulley and a second guide pulley; the take-up mechanism comprises a take-up wheel and a take-up servo motor. Thus, the wire drawing quality and the wire drawing efficiency can be improved, the wire breaking phenomenon is not prone to occurring, and the automatic wire drawing equipment is stable in operation, extremely low in fault rate in the wire drawing machining process and capable of meeting the requirement for drawing finer wires.

The invention relates to the technical field of well drilling ball valves, and discloses a well drilling ball valve restarting device which comprises a ball valve shell, a mounting bin is mounted at the upper end of the ball valve shell, a driving assembly is arranged in the mounting bin, a first auxiliary restarting assembly is mounted on one side of the driving assembly, and a second auxiliary restarting assembly is mounted on the other side of the driving assembly. And a second auxiliary restarting assembly is arranged on the other side of the driving assembly. According to the well drilling ball valve restarting device, through the first auxiliary restarting assembly, a driving motor drives a belt to tighten a belt pulley so as to increase friction force, a valve rod is driven to rotate, the restarting reliability is enhanced, the high friction force is used for overcoming the valve ball clamping stagnation problem, the manual risk is reduced, remote or automatic operation is supported, manual intervention in the high-risk environment is reduced, and the well drilling ball valve restarting device is suitable for popularization and application. Through the second auxiliary restarting assembly, redundant restarting capacity is provided, the second auxiliary restarting assembly serves as a secondary backup to ensure reliability when motor driving fails, the structure is simple, response is fast, a pneumatic system acts fast, and the system is suitable for emergency working conditions.

The invention provides a big data-based building construction safety assessment method, which comprises the following steps of: acquiring a tension distribution gradient, a local stress peak value, a tension fluctuation frequency and a pulley contact surface friction coefficient of a tower crane steel wire rope under a dynamic working condition, and determining a dynamic stress distribution characteristic of the steel wire rope; performing real-time data screening and peak value identification processing on the dynamic stress distribution characteristics to obtain a stress concentration coefficient distribution diagram of each measuring point, and determining a tension concentration area with the stress concentration coefficient higher than a preset threshold value; carrying out weighted adjustment on the non-uniform wear characteristics, calculating to obtain the surface wear depth, the wear particle size and the weight change of the contact surface temperature rise under different working conditions, and obtaining the real-time wear index weight distribution; and aiming at the real-time wear index weight distribution, combining the tension distribution gradient and the wear region area in the historical operation data, and analyzing and predicting the change trend of the surface roughness of the steel wire rope through wear trend fitting and load history to obtain a residual life prediction value.

The utility model relates to an active load adjusting bridge system for a cutter suction dredger. Comprising a bridge frame, the root of the bridge frame is hinged to a cutter suction dredger body, a mud pump assembly and a mud pipeline are installed in the middle of the bridge frame, and a reamer assembly is installed at the end of the bridge frame; a portal frame is installed at the position of a bow of the cutter suction dredger body, a pulley system is installed at the top of the portal frame, a lifting pulley is installed at the top of the end of the bridge frame, a lifting winch is further installed on the cutter suction dredger body, and a lifting steel cable collected and released by the lifting winch is wound on the pulley system and the lifting pulley. And a hydraulic load assembly for exerting an active pushing effect on the bridge frame is further mounted between the cutter suction dredger body and the bridge frame. According to the active load adjusting bridge system for the cutter suction dredger, active load control is applied in a hard soil excavation scene, so that the reamer assembly can effectively feed in a water bottom mud surface, smooth construction is achieved, and excavation construction efficiency is guaranteed.