28results about How to "Stable power delivery" patented technology

The invention discloses insect prevention, irrigation and fertilization integrated equipment based on vegetable greenhouse planting. The insect prevention, irrigation and fertilization integrated equipment comprises a walking frame, a lifting mechanism, an inclination angle adjusting mechanism and an operation mechanism. The lifting mechanism is installed on the walking frame, and the dip angle adjusting mechanism is connected with the lifting mechanism and ascends and descends along with the lifting mechanism. In the operation mechanism, an assembling support is matched with the inclination angle adjusting mechanism, and a main folding and unfolding support is installed on the assembling support in a sliding mode. The alignment adjusting assembly is in power connection with the main folding and unfolding support. And the folding and unfolding adjusting assembly is in power connection with the auxiliary folding and unfolding supports. The driving assembly is in power connection with the alignment adjusting assembly and the folding and unfolding adjusting assembly; the spraying assembly comprises a nozzle, a liquid supply connecting pipe and a scissors fork type mechanism, the scissors fork type mechanism is mounted on the main and auxiliary retractable brackets, the liquid supply connecting pipe is uniformly assembled on the scissors fork type mechanism, and the nozzle is connected to the liquid supply connecting pipe. The production efficiency of greenhouse vegetables can be effectively improved, the cost is reduced, the resource waste is reduced, and the requirements of efficient, energy-saving and sustainable agricultural development are met.

The invention provides a bending-torsion composite shock absorber structure of a rotor system and a shock absorption method of the bending-torsion composite shock absorber structure, and relates to the technical field of bending-torsion composite shock absorption. According to the bending and twisting composite shock absorber structure of the rotor system and the shock absorption method of the bending and twisting composite shock absorber structure, the bending and twisting composite shock absorber structure of the rotor system comprises a mounting outer disc, a plurality of damping shock absorbers and an outer support, the damping shock absorbers are mounted in the mounting outer disc and distributed in a circumferential array mode, and the outer support is mounted on the inner sides of the damping shock absorbers; the driving disc assembly comprises a driving disc body, a plurality of key grooves used for being connected with a driving shaft of the rotor system are formed in the outer surface of the driving disc body, a friction plate is fixedly connected to the center of the front side wall of the driving disc body, and a connecting circular ring is fixedly connected to the position, located on the outer side of the friction plate, of the front side wall of the driving disc body. The distance between the two movable limiting blocks is adjusted, so that the relative rotation angle of the driving disc and the driven disc is changed, and then different working conditions and load changes are adapted.

The utility model discloses a millet harvesting thresher, including mobile car, be provided with the thresher subassembly on the mobile car, the thresher subassembly includes thresher cylinder, second motor, driving wheel, driven wheel and transmission belt, the thresher cylinder sets up on the mobile car, second motor fixed mounting is on the mobile car, the driving wheel is connected in the output of second motor, the driven wheel rotatoryly connects on the thresher cylinder, transmission belt transmission is connected on the driving wheel and driven wheel, one end of mobile car sets up in the filter component, the filter component includes fixed frame, mobile frame and filter plate, the fixed frame installs on the mobile car, mobile frame slidingly connects on the fixed frame, the filter plate installs on the mobile frame, to solve the operation of the thresher process in the background art not enough convenient technical problem.

The utility model discloses a deposition device, including the reaction chamber, the reaction chamber has the reaction cavity in, the reaction chamber upper portion is provided with the feed port for the single atom from top to bottom to enter the reaction cavity, the reaction chamber upper still is provided with the gas inlet and the gas outlet for the gas to go in and out, be provided with the deposition chamber for the single atom and powder mix in the reaction cavity, the deposition chamber is provided with the stirring mechanism for making the single atom with powder can mix even, the utility model discloses setting stirring mechanism continuously turns over the powder in the deposition chamber, the contact surface of dynamic adjustment powder and single atom / cluster particle, effectively solved the powder easy to conglomeration in the prior art, the low problem of coating efficiency, quality stability difference caused by uneven contact, ensure that powder surface evenly coats single atom / cluster, promote material performance consistency, the structure detachable design has strengthened the operation convenience and environmental adaptability.

The invention relates to the technical field of solid waste full-automatic treatment devices, in particular to a dynamic thermal energy cracking medical solid waste full-automatic treatment device which comprises an equipment main machine frame, a machine frame stand column is fixedly installed on the outer side of the equipment main machine frame, and a barrel body lifting positioning mechanism is fixedly installed at the rear end of the machine frame stand column. And an inner pressure adjusting mechanism is rotatably mounted at the upper end of the upper cover hinge base, an equipment base is fixedly mounted in the equipment main rack, a power driving mechanism is fixedly mounted between a power motor and the lower end of the treatment cavity, and a cutter body angle adjusting mechanism is fixedly mounted at the output end of each telescopic rod. The staggered blades can complete efficient crushing, the contact area of solid waste and the high-temperature environment is increased, and the cracking efficiency is improved. And meanwhile, a cutter body angle adjusting mechanism can flexibly adjust cutting and stirring angles according to the type and hardness of the solid waste, precise adaptation of crushing and cracking is achieved, and the problems that due to a single treatment mode of traditional equipment, local harmlessness is not achieved, and the treatment period is long are solved.

The utility model relates to profile cutting technical field especially relates to a profile cutting machine, the profile cutting machine includes: work board, guide block, reset component, baffle, adjusting assembly, clamping assembly, the top one side fixed connection of work board has the assembly plate, the top remote both sides symmetrical fixed connection of assembly plate has the support plate, the inside fixed connection of the similar one side of two support plates has the rotating rod, the outside rotation of rotating rod is connected with the bearing plate, the right rear side fixed connection of bearing plate has the connecting rod, the inside rotation of connecting rod one side is connected with transmission rod, the top fixed connection of bearing plate has the motor, the drive end fixed connection of motor has the driving wheel, the utility model can adjust the baffle position fastly, determines the cutting length size, has improved work efficiency greatly, has reduced the time and the energy consumption of adjustment, and avoided the thread wear problem caused by the frequent dismounting and the installation bolt nut, has improved the stability of equipment whole.

The utility model relates to the technical field of tea cake production, and provides a tea cake discharging device which comprises a rack, a pushing device arranged on the rack and a tea shoveling device connected to the output end of the pushing device, the pushing device can push the tea shoveling device to move, and the tea shoveling device comprises a tea shoveling plate. And at least one tea shoveling brush is arranged on at least one surface of the tea shoveling plate. Tea cakes are separated from the mold through the tea shoveling device, the tea cakes adhered to different positions of the mold can be separated at a time through the multiple tea shoveling brushes in different directions, the working efficiency is improved, the structure is simple, energy consumption is saved, the mechanical cost is reduced, the tea shoveling brushes are made of soft materials, and the tea shoveling brushes are convenient to use. The tea cake discharging device reduces tea cake damage caused by excessive friction and pressure, and solves the technical problems that an existing tea cake discharging device may cause tea cake damage and is complex in structure and low in working efficiency.

The present invention relates to a gearbox shift control system, method, device and tractor for a tractor, and belongs to the technical field of tractor control. The system includes a starting clutch, a gearbox and a controller arranged on the tractor, wherein the starting clutch is controlled by a proportional solenoid valve, and the gearbox includes a plurality of gear clutches, each gear clutch is controlled by a switch solenoid valve, and the proportional solenoid valve and each switch solenoid valve are connected to the controller; the controller is used to obtain the operating parameter information of the tractor in real time; judge whether the current gear of the gearbox of the tractor meets the automatic shifting condition; if the automatic shifting condition is met, a control strategy is generated based on the operating parameter information and a preset control rule, and the operating state of the proportional solenoid valve and at least one switch solenoid valve of the gearbox is controlled based on the control strategy, so that the current gear of the gearbox is switched to the target gear. The slipping phenomenon of the clutch during the gear shifting process is reduced.

The invention discloses snow-throwing and snow-pressing integrated snow-removing equipment, and relates to the technical field of snow-removing equipment, the snow-throwing and snow-pressing integrated snow-removing equipment comprises a special chassis for a snow-removing vehicle, the front end of the special chassis for the snow-removing vehicle is connected with a snow-throwing head, the top of the snow-throwing head is provided with a snow-guiding groove, the outlet of the snow-guiding groove is aligned with the feeding end of a conveying belt assembly, and the conveying belt assembly is obliquely arranged on the special chassis for the snow-removing vehicle. The discharging end of the conveying belt assembly is correspondingly arranged at the feeding hole of the snow pressing box assembly; the snow pressing box assembly is arranged at the rear end of the special chassis for the snow sweeper, and the conveying tail plate assembly is hinged to the lower portion of the discharging end of the snow pressing box assembly. The coupler assembly comprises a coupler fixing support and a coupler, one end of the coupler fixing support is connected with the chassis special for the snow sweeper, and the other end of the coupler fixing support is connected with the coupler in a welded mode. The problems of single function and frequent back-and-forth transportation of existing equipment are solved, and the back-and-forth transportation times of vehicles are effectively reduced.

The invention relates to a parameter determination method and device for a resonant dual-active bridge converter, computer equipment and a storage medium. The method comprises the steps of determining an actual turn ratio based on a low-voltage-side voltage range, a high-voltage-side voltage and a low-voltage-side turn number of the converter; determining the current resonant capacitance of the converter under the lowest switching frequency, the current maximum phase shift angle and the maximum output power based on the actual turn ratio; based on the actual turn ratio, the low-voltage side voltage range and the high-voltage side voltage, a capacitor voltage fluctuation parameter under the current maximum phase shift angle is determined; and under the condition that the capacitor voltage fluctuation parameter is smaller than or equal to a preset constraint fluctuation parameter, determining the current resonant capacitance, the resonant inductance corresponding to the current resonant capacitance and the actual turn ratio as parameters of the converter. By adopting the method, the operation reliability of the converter can be improved.

The utility model discloses a quick-change manipulator and a material taking and placing mechanism, and belongs to the field of manipulators, the quick-change manipulator comprises a servo motor, a base, a swivel joint, an angular contact bearing seat, a rotating shaft, a mounting seat, a quick-change seat and a pneumatic clamp, the servo motor, the swivel joint and the angular contact bearing seat are all fixed on the base, and the rotating shaft is fixed on the mounting seat. The servo motor is connected with the rotating shaft through the swivel joint, the bottom end of the rotating shaft penetrates through the angular contact bearing seat to be fixedly provided with a mounting seat, the quick-change seat is detachably connected to the mounting seat, and the pneumatic clamp is detachably connected to the quick-change seat. According to the quick-change mechanical arm and the material taking and placing mechanism, the rotary connector is arranged between the servo motor and the rotary shaft, and the angular contact bearing seat is combined, so that high-precision and stable power transmission and rotary motion are achieved, vibration, noise and abrasion are reduced, pipeline winding is avoided, and the quick-change mechanical arm and the material taking and placing mechanism are convenient to use through the tool-free disassembly design of the quick-change seat and the mounting seat. The replacement efficiency of the pneumatic clamp is greatly improved, and the equipment universality and the production flexibility are enhanced.

The utility model discloses a water surface swimming pool cleaning robot, water surface swimming pool cleaning robot includes the organism and two propellers, and the accommodation cavity is formed in the organism, and the opening is formed with one end of the organism, and the opening is communicated with the accommodation cavity, and in the organism advancing process, the floating object on the water surface enters the accommodation cavity through the opening, and two propellers set up in the other end of the opening, and the drive assembly is arranged in the organism, and the drive assembly at least partial exposure is in the organism outside, and the propeller is set up with drive assembly magnetic attraction, and under the condition that the propeller is set up with drive assembly magnetic attraction, drive assembly is used for driving the propeller rotation to make the organism advance. Drive assembly and propeller connecting structure, through magnetic attraction type detachable propeller structure, form stable connection between drive assembly and propeller, facilitate quick disassembly maintenance simultaneously, solved the traditional fixed propeller easy to jam and the difficult problem of maintenance, has the propeller maintenance convenient and the advantage that power transmission is stable.

The utility model discloses a large-torque PCD reamer of a numerical control machine tool, and particularly relates to the technical field of reamers, the large-torque PCD reamer comprises a reamer mounting end, a connecting mounting sleeve is arranged on the outer end face of one side of the reamer mounting end, a connecting mounting block is arranged at one end of the connecting mounting sleeve, and a limiting baffle is arranged in the middle of the outer end face of the connecting mounting block. In actual use, the two ends of the second spring can abut against the inner side of the connecting mounting plate and the inner side of the limiting partition plate in the state that the connecting mounting block, the connecting sliding sleeve, the first spring, the second spring and the limiting partition plate are correspondingly arranged, and therefore the limiting mounting base is attached to the end face of one side of the connecting mounting plate; the two ends of the first spring can abut against the end face of one side of the limiting baffle and the end face of one side of the limiting partition plate, the reamer body can be driven to rotate by using the connecting installation block and the limiting installation base as a shaft connector for transmission of the reamer installation end, and therefore power transmission between the reamer installation end and the reamer body is more stable.

The utility model discloses a blade arraying machine, which belongs to the field of arraying machines and comprises a first machine frame, a material tray conveying line, a loading tray conveying line, a first material moving assembly, a loading tray transfer bin, a loading tray transfer assembly, a material tray and a loading tray, the material tray conveying line and the loading tray conveying line are arranged side by side, and the material tray is placed on the material tray conveying line. The carrying disc is placed on the carrying disc conveying line, the material moving end of the first material moving assembly is located above the material disc conveying line and the carrying disc conveying line, the first material moving assembly is used for taking away blades of the material disc and placing the blades on the carrying disc, and the carrying disc transferring assembly is arranged between the carrying disc conveying line and the transfer bin. The transferring device is used for transferring the carrying discs fully loaded with the blades from the carrying disc conveying line to the transferring bin. According to the automatic blade arranging and transferring device, automatic arranging and transferring of blades from the material disc to the carrying disc are achieved, manual disc arranging and carrying are not needed, seamless butt joint with machining equipment can be achieved through the arrangement that the carrying disc transferring assembly is combined with the carrying disc transferring bin, and production efficiency and safety are remarkably improved.

The utility model relates to the field of unmanned ships, in particular to a steering mechanism for a ship and an air cushion unmanned ship. The embodiment of the utility model provides a steering mechanism for a ship, which comprises a driving part, a linkage component and a rudder blade, and the driving part is arranged on a ship body of the ship; the linkage assembly comprises a first linkage piece, a flexible axis and a second linkage piece, the first linkage piece is connected between the driving part and one end of the flexible axis, and one end of the second linkage piece is connected with the other end of the flexible axis; the rudder blade is rotatably arranged on the ship body, and the rudder blade is connected with the other end of the second linkage piece so as to be driven by the driving part to swing. According to the steering mechanism for the boat, high-stability power transmission can be achieved, the manufacturing and mounting cost is reduced due to the simple structure, and the applicability is high.

The present invention discloses a heat exchanger tube sheet inspection robot and a working method thereof, belonging to the field of heat exchanger tube and tube sheet weld inspection, comprising a main shell; the main shell is connected with a rotating mechanism, a detecting mechanism and two translation mechanisms; wherein the rotating mechanism is used to drive the main shell to rotate circumferentially; the detecting mechanism is used to inspect the heat exchanger tube sheet; the two translation mechanisms are respectively movably connected to both sides of the main shell, and are used to drive the main shell to move linearly. The robot and the working method thereof can solve the technical problems of the existing tube sheet inspection method, which is difficult to operate and has low inspection efficiency due to reliance on manual labor.

The utility model relates to bridge support positioning detection technical field discloses a kind of bridge support positioning detection unmanned plane, including the unmanned plane body for positioning detection to bridge support, the bottom end of unmanned plane body is fixedly connected with the positioning probe for positioning to bridge support, the upper end of unmanned plane body is fixedly connected with the controller for regulating and controlling unmanned plane, adjusting mechanism for adjusting detection angle is arranged at the center of unmanned plane body bottom end, the one end of adjusting mechanism is provided with the detector for detecting bridge support, adjusting mechanism takes bottom plate and motor base as stable base, adjusting motor is fixed by limiting column Synchronous belt accurate force transmission to synchronous wheel and screw rod. The movable column driven by screw rod moves steadily under the Z-shaped structure limiting of fixed column, rotating is driven by first connecting column adjusting plate, two side connecting rods are assisted to support. Ensure that detector angle adjustment is accurate and stable, effectively solve the problem of inaccurate positioning caused by angle deviation under bridge detection.

The invention relates to the technical field of new energy grid connection, and particularly discloses a micro-grid and flexible resource collaborative optimization power distribution network planning method, which comprises the steps of setting two groups of energy storage devices to store electric energy of new energy power generation equipment, arranging the two groups of energy storage devices in parallel, and connecting the two groups of energy storage devices with a micro-grid through power electronic interfaces, and a bidirectional energy storage converter is selected as interface equipment for grid-connected operation of the micro-grid and the power distribution network. According to the technical scheme, the two sets of energy storage devices are designed to be used for alternately storing energy and continuously and stably supplying power, waste of electric energy of new energy power generation equipment is avoided, the two sets of energy storage devices adopt delay disconnection design during switching, the electric energy of the energy storage devices is continuously supplied to the micro-grid, the power supply quality of the micro-grid is improved, and the power supply efficiency is improved. Meanwhile, a monitoring device is arranged to monitor power data of the micro-grid in real time, the micro-grid is disconnected in time, the power distribution network is started to transmit power, and the power utilization stability of a user is guaranteed.

The utility model is applicable to the technical field of condenser processing, and provides a double-tube expanding device for condenser processing, which comprises a base plate, and a mounting box is fixed at the top of the base plate; the assembling frames are symmetrically arranged in the mounting box, the distance between the assembling frames is adjustable, and rotating rods are rotationally mounted on the two assembling frames; the pipe expanding head is fixedly arranged on the rotating rod through a coupling and is used for expanding a pipe; the mounting frame is fixedly mounted on the assembling frame, a single-shaft motor is fixedly mounted on the mounting frame, and an output shaft of the single-shaft motor is fixedly connected with the rotating rod through a coupler. According to the double-pipe expanding device for condenser machining, the problem that the pipe expanding machining efficiency of an existing condenser is low is solved.

The utility model provides PE film winding and unwinding equipment which comprises a machine base, a pair of supporting plate frames are arranged on the machine base, a roller set is arranged between the supporting plate frames, transmission shaft seats are arranged on the supporting plate frame on one side and correspond to the roller set in position, and supporting shaft seats are arranged on the supporting plate frame on the other side and correspond to the roller set in position. Under the driving of the motor to one of the tooth-shaped belt pulleys, the tooth-shaped belt pulleys connected with the supporting roller, the discharging roller and the receiving roller are linked through the tooth-shaped belt, and the supporting roller and the punching roller are linked through the gears, so that the discharging power output, the punching power output and the receiving power output are consistent, the transmission ratio of the two gears is 1: 1, and the punching efficiency is improved. The transmission ratio of the three tooth-shaped belt wheels is 1: 1: 1, and therefore it is guaranteed that the rotating speed of discharging, punching and collecting is kept consistent, and the punching precision is greatly improved.

The utility model provides an automatic agricultural machinery matched weeding machine which comprises a main machine shell, auxiliary machine shells are hinged to the two sides of the main machine shell through hinge shafts, a first protective cover is fixedly installed at the top end of the main machine shell, a connecting frame is installed at the top end of the first protective cover, hydraulic cylinders are hinged to the two sides of the connecting frame, and hinge bases are fixedly installed at the top ends of the two auxiliary machine shells. The output ends of the two sets of hydraulic cylinders are hinged to the corresponding hinge bases. The bottom sides of the two sets of auxiliary machine shells are connected with first weeding knives, and the bottom side of the main machine shell is connected with second weeding knives. The hydraulic cylinder is arranged to drive the auxiliary machine shell to be unfolded or folded around the hinged shaft, the coverage range of the first weeding cutter and the second weeding cutter can be adjusted, meanwhile, when not used, the weeding machine can be folded and stored, and the use flexibility of the device is improved; through the arrangement of the universal wheels, under the cooperation of the sleeve, the supporting rod, the plum blossom handle bolt, the worm, the worm gear and the driving motor, the height of the blade on the weeding machine can be adjusted according to weeds of different heights or the fluctuation of the ground.

The utility model relates to the technical field of ball screw, concretely is a kind of two-way thread double-station ball screw, including workbench, sliding element, installation element, first screw assembly and second screw assembly;Sliding element is set at the both sides of workbench, first screw assembly and second screw assembly are oppositely set on workbench to drive the relative motion of sliding element;The both ends of installation element are erected in workbench, the installation element is used to first screw assembly and second screw assembly installation, so that first screw assembly and second screw assembly carry out unified transmission on the workbench;By setting sliding element at the both sides of workbench, the relative motion of first screw assembly and second screw assembly is provided with stable support and smooth sliding condition, by oppositely arranged first screw assembly and second screw assembly, the synchronous or asynchronous motion of double-station can be realized, increase flexibility and functionality, satisfy different work needs, or carry out different operation to different workpieces, improve work efficiency, and it is strong practicality.

A reaction cup conveying device (10). The reaction cup conveying device (10) comprises an inner circular conveying plate body (100), an outer circular conveying plate body (200), reaction cup loading assemblies (300) and a driving mechanism (400), wherein the outer circular conveying plate body (200) is sleeved over the inner circular conveying plate body (100) and can rotate relative to the inner circular conveying plate body (100); the plurality of reaction cup loading assemblies (300) are arranged on a plate surface of the outer circular conveying plate body (200) at intervals; each reaction cup loading assembly (300) is provided with an embedding recess (310) for a reaction cup to be placed therein an embedded manner; and the driving mechanism (400) is connected to the outer circular conveying disc body (200) and is used to drive the outer circular conveying disc body (200) to rotate. The reaction cup conveying device (10) can implement the accurate conveying of a certain number of reaction cups, and solves the problems of the poor positioning accuracy and complex structure of the conveying of reaction cups by means of an outer annular plate body in an existing mechanism.

The utility model belongs to the technical field of battery bracket, specifically disclose a new energy automobile battery bracket with buffer structure, including the casing and recess, the recess is arranged between the both sides of casing inside, and the both sides of recess inside are swing -jointed with the slide respectively, the top of slide is transversely fixed with battery main body, the bottom of casing is transversely pasted with the bottom plate. This new energy automobile battery bracket with buffer structure has bottom plate transversely pasted below casing, bottom plate is pasted below casing, screw hole and hole are aligned, screw bolt one is screwed in, slide rod is pulled out along sleeve and uses screw bolt three, after slide rod is sleeved on the foot with sleeve ring, the installation of buffer structure is completed, if vibration is encountered, then rubber sleeve and movable rod produce frictional resistance, avoid movable rod to slide fast in the cylinder, avoid the rapid subsidence of bottom plate and casing, play the protection effect, solved the problem that lack of support buffering.

The utility model provides a tooth type brake mechanism of a numerical control rotary table. The gear type brake mechanism of the numerical control rotary table comprises a working table, a motor is installed on the left side of the working table, a small gear is fixedly connected to the driving end of the motor, a large gear is meshed with the small gear, a worm is fixedly connected to the large gear, a vortex disc is rotationally connected to the interior of the working table, the vortex disc is meshed with the worm, and the worm is fixedly connected to the working table. A rotating shaft is fixedly connected to the top of the vortex disc, a rotating disc is fixedly connected to the top of the rotating shaft, a mounting groove is formed in the top of the rotating disc, a sliding rod is slidably connected to the front face of the workbench, a pressing plate is fixedly connected to one end of the sliding rod, and a first brake gear sleeve is fixedly connected to the other end of the sliding rod; the back face of the first brake gear sleeve is fixedly connected with a spring, and the surface of the worm is fixedly connected with a manual brake gear. The tooth type brake mechanism of the numerical control rotary table has the effects of improving the corresponding speed of equipment and prolonging the service life of brake equipment.

This utility model provides an anchor bolt construction device, including a base plate mounted on an engineering vehicle. A frame is fixed at the center of the top of the base plate, and an installation cylinder is vertically positioned at the center of the frame. An angle disc is integrally connected to the top of the frame, and a first rotating component is mounted on the installation cylinder. Compared with the prior art, this utility model has the following advantages: The first rotating component, through the cooperation of a drive rod, a drive worm gear, a first worm, and a first servo motor, achieves 360° rotation in the horizontal plane. The fit between the limiting plate and the outer wall of the installation cylinder, as well as the cooperation between the pointer and the angle disc, ensures precise control and intuitive display of the horizontal rotation angle. The second rotating component, through the connecting sleeve, worm gear teeth, a second worm, and a second servo motor, achieves rotation from -10° to 150° in the vertical plane. The cooperation between the scale line on the anti-detachment ring and the opening of the limiting sleeve makes the vertical rotation angle clearly visible, facilitating real-time calibration by the operator.

The present application relates to the field of polar winding unwinding, and specifically provides a kind of unwinding device and its shaft assembly, to solve the problem of existing coaxial storage feeding device, artificial gap needs to be provided between dynamic polar winding and static polar winding, to ensure that dynamic and static polar winding will not be affected, leading to lower feeding efficiency.For this purpose, the shaft assembly of the unwinding device of the present application comprises: a bearing shaft for bearing polar winding;Unwinding sleeve, which is rotatably arranged at the first end of the bearing shaft;Springback assembly, which is arranged at the first end of the bearing shaft;Feeding assembly, which can drive the polar winding on the bearing shaft to move across the springback assembly to the unwinding sleeve, the springback assembly can drive the polar winding on the bearing shaft to move to the second end of the bearing shaft, so that the polar winding on the unwinding sleeve is separated from the polar winding on the bearing shaft, the unwinding sleeve drives the polar winding to unwind, the polar winding on the unwinding sleeve will not drive the polar winding on the bearing shaft to rotate due to friction, which ensures the quality of unwinding, and also ensures that the polar winding on the bearing shaft will not be damaged due to rotation.

The utility model provides a concrete strength monitoring device, which belongs to the field of bridge concrete monitoring and aims to solve the problem that bridge concrete monitoring needs to damage a concrete surface and affects structural safety. A driving motor is fixedly mounted at the top of the fixed mounting frame, a synchronous belt is slidably connected to the end face of the top of the fixed mounting frame, threaded rods are rotatably connected to the left and right side walls of the fixed mounting frame, lifting sliding blocks are slidably connected to the left and right side walls of the fixed mounting frame, and a sliding frame is slidably connected to the front sides of the lifting sliding blocks; a sliding seat is transversely and slidably connected to the sliding frame, an intelligent strength detector is fixedly mounted in the sliding seat, and a data antenna is integrated at the front end of the intelligent strength detector; the concrete strength monitoring device is fixedly mounted on a concrete structure of a bridge through the fixed mounting frame, so that the device can monitor the concrete strength in real time, and crushing and sampling operation on the bridge concrete is avoided, so that the influence on the bridge concrete structure is reduced.