927results about "Counterweights" patented technology

The invention discloses a wind generating set anti-inclination hoisting device which comprises a hoisting frame used for hoisting a generating set and a hoisting seat connected with a hoisting hook, balancing weights are slidably connected to the periphery of the hoisting frame, and the periphery of the hoisting frame is connected with the hoisting seat through a telescopic device; an inclination sensing device and a plurality of wind direction sensing devices are arranged on the hanging bracket; the inclination sensing device detects inclination of the hanging bracket and triggers the corresponding driving device to enable the balancing weight to move in the opposite direction. Each wind direction sensing device responds to wind in a preset direction range and triggers the corresponding telescopic device to stretch out and draw back so as to counteract hanging bracket inclination caused by the wind in the direction. The device can prevent inclination caused by self weight or wind power of the wind turbine generator.

The invention provides a hoisting method of a flare tower. The hoisting method comprises the following steps: calculating the total weight and the gravity center position of a flare tower assembly; according to the requirements of the lifting height and the preset inclination angle, a balance weight piece and a main lifting lug are additionally arranged on the flare tower, so that the included angle between the horizontal plane and the connecting line between the main lifting lug of the lifted flare tower and the gravity center of the flare tower assembly is within the preset inclination angle range; welding two connecting pieces and a positioning rod at the bottom of the flare tower; hoisting the flare tower in a horizontal mode to enable the flare tower to be separated from the supporting surface; inclining the flare tower to enable the included angle between the center line of the flare tower and the horizontal plane to be a preset inclination angle; the flare tower is lifted to a deck, and a positioning rod at the bottom of the flare tower gradually gets close to a limiting device arranged on the deck; slowly moving the flare tower until the positioning rod enters the limiting device so as to limit the rotation of the positioning rod; and rotating the flare tower to enable the flare tower to vertically stand on the deck, and welding the base of the flare tower and the deck.

The invention relates to the technical field of bridge construction, and discloses a guide-beam-free incremental launching construction hoisting balance weight structure for bridge construction, which comprises an incremental launching platform and a gantry crane above the incremental launching platform, the counterweight assembly comprises two slide rails, two wheel carriers, two groups of rollers, a base, a plurality of counterweight blocks, two groups of guide wheels and two pull ropes; and the lubricating assembly is used for lubricating the two groups of rollers. Through the arrangement of the counterweight assembly, the base can move reversely along with the movement of the gantry crane, self-adaptive position adjustment of the multiple counterweight blocks is achieved, the gantry crane and the multiple counterweight blocks are kept in a balanced state on the pushing platform, the bending moment and the shearing force peak value of the pushing platform are reduced, and through the self-adaptive position adjustment, the service life of the pushing platform is prolonged. And the operation of actively adjusting the position of the balancing weight by an operator is reduced, and the operation time is saved.

The utility model discloses a measuring device for engineering cost, and relates to the technical field of measuring instruments. The measuring device for the construction cost comprises a measuring instrument body, a tripod, an upper protective cylinder, a lifting rope and a cloth disc, the measuring instrument body is detachably installed at the top end of the tripod, the upper protective cylinder is arranged above the measuring instrument body and is of a hollow structure with an opening in the bottom, and the upper protective cylinder can cover the measuring instrument body; the lifting ropes are arranged on the inner side of the tripod and located at the position close to the bottom of the tripod, and three or more sets of lifting ropes distributed in an annular array are connected between the inner side of the tripod and the cloth disc. According to the measuring device for the engineering cost, a counterweight can be placed on the cloth disc for counterweight, the overall gravity center of the device is lowered, the risk that the device topples due to the influence of external force is lowered, the overall stability of the device is improved, guarantee is provided for stability and safety of the device, and meanwhile the cloth disc is made of flexible materials and convenient to store; and the operation and use of the tripod are not influenced.

The utility model discloses an automobile suspension front cross beam mass block which comprises a suspension shaft body, a limiting ring is arranged on the side wall of the middle of the suspension shaft body, and a mass block assembly is fixedly installed on the outer side wall of the suspension shaft body. The mass block assembly comprises a fixed clamping mechanism, and a mass assembling assembly is arranged below the fixed clamping mechanism. Through the arrangement of the limiting ring and the fixed clamping mechanism, when the mass block assembly is assembled on the suspension shaft body, the fixed clamping mechanism and the limiting ring are matched for limiting to clamp and fix the suspension shaft body, the stability and compactness of installation are guaranteed, and assembly is convenient and firm; through the arranged mass assembling assembly, the balancing weight can be disassembled and assembled according to requirements to adjust the weight, the balancing weight is clamped in the middle, a stable installation environment is provided for the balancing weight, the gravity center of the mass is kept in the middle, and it is guaranteed that the gravity center of a vehicle body is stable.

The invention discloses an intelligent security door and window and a using method, and relates to the technical field of security doors and windows, the intelligent security door and window comprises a window frame and further comprises a security device, a window frame is fixedly mounted on the inner wall of the window frame, a linear motor fixing end is fixedly mounted at the top of the inner wall of the window frame, and a glass window is fixedly mounted at the output end of the linear motor; wherein the security and protection device comprises a connecting base, rolling wheels, a partition plate, an L-shaped rod, an elastic telescopic plate, a brush, a collecting groove, a square rod and an alarm, a linear motor drives the glass window to move in the direction close to the inner wall of the window frame, and the glass window moves in the direction close to the inner wall of the window frame to drive the connecting base to move in the direction close to the inner wall of the window frame; the connecting base is fixedly installed at the bottom of the glass window, and the situation that when the glass window is opened, foreign matter is clamped in a window frame, the glass window shakes, the alarm may be triggered, the alarm mistakenly judges that people break the window, false alarm is caused, and police resources may be wasted is prevented.

The invention relates to the technical field of vehicle wind vibration resistance stabilization, and discloses a vehicle wind vibration resistance stabilization system based on liquid balance weight and damping dynamic optimization, which comprises a vehicle body, a liquid balance weight system, an active damping system, a sensor group and a controller, the liquid balance weight system comprises a liquid storage tank, a water conveying pipeline, a water pump and a plurality of balance weight liquid bags, the liquid storage tank is fixed to the bottom of the vehicle body, one end of the water conveying pipeline is fixedly arranged on a connecting port of the liquid storage tank, the other end of the water conveying pipeline is fixedly arranged on a connecting port of the balance weight liquid bag, and the water pump is fixedly arranged on the water conveying pipeline. The active damping system comprises a plurality of dampers. According to the invention, through the liquid counterweight system, the controller is used for controlling the operation of the water pump in real time, so that the problem that the gravity center of the vehicle shifts because the vehicle cannot adapt to the real-time wind load change because the wind vibration resistance of the existing vehicle mostly depends on a fixed counterweight block or a mechanical counterweight structure is improved.

The invention relates to the technical field of cordless curtains, and provides a driving structure of a cordless roller shutter, the cordless roller shutter and an adjusting method. The driving structure comprises a reel, a motor assembly, a volute spiral spring mechanism and a worm and gear mechanism. The motor assembly is used for driving the reel to rotate so as to drive the curtain cloth to ascend and descend, the volute spiral spring mechanism is used for generating hovering torque opposite to gravitational torque of the curtain cloth in the rotating process of the reel, and the worm and gear mechanism is used for adjusting pre-tightening torque of the volute spiral spring mechanism and forming one-way transmission locking, so that in the stroke range of the curtain cloth, the curtain cloth is driven to ascend and descend. The hovering torque of the volute spiral spring mechanism and the gravitational torque of the curtain cloth are kept balanced. The problems that in the prior art, operation is complex and time is consumed when the balance torque is adjusted are solved, and the applicability and convenience of a product are remarkably improved. And accidental sliding or springback of the curtain cloth can be restrained, and long-term stability of the pre-tightening torque and use safety of the roller shutter are guaranteed.

The utility model relates to the technical field of balance adjustment, in particular to a drilling machine balance rapid adjusting device which comprises a disc, an installation mechanism is installed at the bottom of the disc, a rotating mechanism is installed on the surface of the disc and comprises a cylinder, a positioning rod is welded to the top of the cylinder, and the positioning rod is fixed to the disc. The surface of the positioning rod is movably sleeved with a positioning block. The position of the balancing weight is adjusted according to the condition of the drilling machine, the drilling machine is adjusted to be balanced, the first motor is controlled to operate to enable the gear to rotate, then the gear ring and the cylinder rotate, the positions of the shell and the balancing weight are adjusted, the second motor rotates to enable the lead screw to rotate, and the movable plate, the positioning rod and the balancing weight move. Therefore, the device has the advantage that the positions of the balancing weights can be subjected to multi-direction displacement adjustment, the gravity center of the drilling machine is changed, the drilling machine is subjected to quick balance adjustment, the number and the weight of the balancing weights on the positioning rod are adjusted, and the adaptability of the device is improved.

The invention relates to the field of crankshaft vibration reduction, in particular to a vibration reduction crankshaft and a vibration reduction balance weight structure used in cooperation with the vibration reduction crankshaft. A first cam, a first connecting rod shaft, a second cam, a main shaft, a third cam, a second connecting rod shaft, a balance weight shaft and a balance weight disc are sequentially and fixedly connected in series from the mounting shaft to the middle of the crankshaft, the balance weight disc comprises a cover plate and a mounting disc, and the mounting disc is formed by combining a plurality of adjusting structures which are uniformly distributed in the circumferential direction. The position of the adjusting column relative to the axis of the balance weight disc is adjusted, and the position of the mass center of the whole crankshaft is adjusted through rotation of the first screw rods in the multiple adjusting structures. In addition, through the balance weight structure used in cooperation with the balance weight disc, flexible adjustment and rapid adjustment of the balance weight of the crankshaft are achieved, the operation time is saved, and the operation difficulty is reduced.

The invention discloses a surveying and mapping device for land space planning and a supporting assembly thereof, and relates to the technical field of land surveying and mapping, the surveying and mapping device comprises a base, a total station for surveying and mapping is mounted on the top surface of the base, a supporting disc is arranged on the bottom surface of the base, a fixing ring fixedly sleeves the outer circular wall surface of the supporting disc, and a connecting lining is fixedly mounted on the bottom surface of the supporting disc; a supporting seat is fixedly mounted on the bottom surface of the connecting bush; a balancing weight, a balancing weight seat, a supporting seat, a wind direction sensor, a wind speed sensor, a vibration sensor, a first driving motor, a supporting rod, a mounting plate, a first connecting rod, a first movable shaft, a second connecting rod, a second movable shaft, a movable rod, a third movable shaft, a supporting frame, a limiting block, a sliding groove and a sliding block are matched with one another; therefore, wind blowing can be resisted by utilizing the movement of the overall gravity center of the base and the total station, the situation that the total station shakes due to wind in the surveying and mapping process and consequently surveying and mapping data are not accurate is prevented, and the surveying and mapping accuracy of the total station is improved.

The utility model discloses a high-precision automobile engine balance weight which comprises a transmission ring, a bottom ring body, fixing columns, fixing holes, arc-shaped pieces, a counter weight frame, fixing pieces, adjusting notches, adjusting columns and adjusting blocks. The fixing holes are evenly formed in the top of the transmission ring, the fixing columns are connected into the fixing holes in a threaded fit mode, and the arc-shaped pieces are arranged on the arc-shaped pieces. The fixing columns are sleeved with through grooves evenly formed in the bottom ring body, and the bottom ring body is attached to the top of the transmission ring. During assembly, the fixing columns penetrate through the through grooves evenly formed in the bottom ring body and are connected into the fixing holes in the transmission ring in a matched mode, relative fixation of the transmission ring and the counter weight frame is achieved, the position of the counter weight structure relative to a transmission plane can be adjusted conveniently according to actual requirements, and the complex actual use requirements are met; the practicability of the balance block is improved; the centrifugal moment of the balance block can be adjusted by rotating the adjusting column under the condition that the rotating speed of the motor is not changed, and the universality of the balance block is improved.

The invention relates to the technical field of rotary mechanical vibration control, in particular to a quasi-zero stiffness annular superstructure device and a sea water pump composite vibration isolation system.The quasi-zero stiffness annular superstructure device comprises an inner ring and an outer ring, and the inner ring and the outer ring are connected through a plurality of quasi-zero stiffness one-dimensional structures; the quasi-zero stiffness one-dimensional structure is formed by sequentially arraying a plurality of groups of quasi-zero stiffness cell structures from top to bottom, a gap is formed between every two adjacent groups of quasi-zero stiffness cell structures, the left side and the right side of each gap are respectively provided with a group of cantilever beams, and the tail ends of the cantilever beams are respectively and fixedly provided with mass blocks with different masses so as to generate a local resonance band gap; piezoelectric patches are pasted on the inclined side wall of the quasi-zero-stiffness one-dimensional structure, a shunt circuit is connected, and a band gap is adjusted through the circuit. Compared with the prior art, multiple band gaps can be generated at low frequency on the basis that the bearing capacity is guaranteed, and low-frequency broadband vibration control over the rotating machine is achieved.

The invention belongs to the technical field of wind turbine generator operation and maintenance, and particularly relates to a wind turbine generator vibration detection device which comprises a base. A vibration detection unit including a vibration sensor; the energy collecting part comprises a multi-order cantilever beam array and an energy storage capacitor, and a piezoelectric plate is arranged on the multi-order cantilever beam array and used for converting mechanical vibration energy into electric energy; the rectifying part is used for converting the alternating current output by the piezoelectric plate into one-way current; through the integrated design of broadband energy harvesting, mechanical rectification and self-energized monitoring, full-scene vibration detection of key components of the wind turbine generator is realized, and the problems that an existing device is dependent on power supply, narrow in frequency band adaptation and poor in reliability in a severe environment are solved. Vibration detection, energy collection and rectification are highly coordinated in spatial layout, mechanical transmission and energy flow direction, and are physically isolated from a power supply circuit, so that the performance is improved, mutual interference is avoided, and real high-integration and high-reliability self-energized detection is realized.

The utility model relates to the field of microorganism samplers, in particular to a fixing device for a microorganism sampler, and aims to solve the technical problems that the stability of the fixing device for the microorganism sampler is poor, the height needs to be manually adjusted when the fixing device is used, and the adjusting structure is not convenient enough. According to the technical scheme, the fixing device for the microorganism sampler comprises a balancing weight, a chassis assembly, a supporting assembly, a bearing assembly, a fixing assembly, a mounting assembly and a power assembly, the stability of the device can be improved through the base with the large bottom area and the balancing weight, the device can be effectively prevented from toppling over by being matched with triangular supporting and fixing of the supporting frame, and the movable block is driven by the lead screw to move up and down, so that the stability of the device is improved. According to the fixing device, the height of the microorganism sampler mounted on the object placing table can be driven to be flexibly and conveniently adjusted, and the problems that the stability of the fixing device of the microorganism sampler is poor, the height needs to be manually adjusted during use, and the adjusting structure is not convenient enough are solved.

The utility model relates to the technical field of surveying and mapping instrument accessories, in particular to a support frame for engineering surveying and mapping, which comprises an annular seat, a support component capable of keeping integral stability in different terrains is fixedly arranged at the bottom of the annular seat, and a movable component capable of keeping a surveying and mapping instrument in a horizontal state on a slope is arranged on the inner side of the annular seat. A base is fixedly arranged at the top of the movable assembly, and a fixed assembly is mounted on the base; the movable assembly comprises a universal moving part movably connected in the annular seat, the inner side of the universal moving part is movably connected with a central column, and the top of the central column is fixedly connected with the bottom of the base; according to the supporting frame for engineering surveying and mapping, the whole supporting frame is in an inclined state after being placed on a slope, the balance weight ball drives the center column to be in a vertical state all the time under the action of the universal moving part, and therefore it can be ensured that a surveying and mapping instrument can be in a horizontal state after being installed, vertical calibration work is not needed in subsequent use, surveying and mapping time can be shortened, and surveying and mapping efficiency is improved. Surveying and mapping efficiency is improved.

The invention relates to the technical field of carts, in particular to a four-wheel quick-release large-base cart which comprises a transmission assembly, a gravity center compensation assembly and a direction reset mechanism. The transmission assembly is arranged in the supporting column. The gravity center compensation assembly is installed in the base in a sliding mode and connected with the transmission assembly. The direction resetting mechanism is connected with the universal wheel; when the bearing platform is rotated, a balancing weight in the gravity center compensation assembly is driven by the transmission assembly to slide reversely along the compensation sliding rail, so that gravity center shift caused by rotation of the bearing platform is counteracted; when the bearing platform is adjusted, the direction resetting mechanism enables the four universal wheels to slowly and automatically recover to the posture that the axes are parallel to the short sides of the base with the four universal wheels arranged in a rectangular shape; the problem that an existing four-wheel medical trolley overturns due to center-of-gravity shift when the angle of a bearing platform is adjusted is solved.

The invention relates to the technical field of environment monitoring equipment, in particular to an environment monitoring device for power transmission and transformation projects, which comprises a bearing frame, the lower part of the bearing frame is hinged with three retractable brackets in triangular distribution, and the upper part of the bearing frame is connected with a placing table for placing an environment monitor through a horizontal adjusting mechanism; and an electric clamp for clamping and fixing the environment monitor is arranged on the placing table. The three retractable supports can be pushed to synchronously rotate outwards to be unfolded through the electric push-pull piece, the three retractable supports can also be pulled to synchronously rotate inwards to be folded, the unfolded second supporting leg and the unfolded third supporting leg can be locked through the electric plug-in piece, and after the second supporting leg and the third supporting leg are unlocked through the electric plug-in piece, the second supporting leg and the third supporting leg can be unfolded. The second supporting leg moves upwards to reset under the action of a third spring, the third supporting leg rotates upwards to be clamped back to the second supporting leg under the action of a torsional spring, operation is convenient, automatic, rapid and convenient storage can be achieved, and rapid transfer and use of the environment monitoring device are facilitated.

The utility model discloses an intelligent remote control type built-in multi-roll sunshade curtain hollow glass which comprises a hollow glass body and a sealing box, the sealing box is arranged at the upper end of the hollow glass body, an electric driving mechanism and a plurality of sunshade roller shutters are arranged in the sealing box, and the sunshade roller shutters are wound on sunshade roller shutter tubes of the electric driving mechanism in a stacked mode. The electric driving mechanism is used for driving the sunshade roller shutter to move up and down in the cavity of the hollow glass; according to the utility model, the plurality of sunshade roller shutters are stacked and wound on one electric driving mechanism, when the plurality of sunshade roller shutters are lifted, only one electric driving mechanism is needed to drive the plurality of sunshade roller shutters to lift, and compared with the prior art that a plurality of external driving motors need to be used when the plurality of sunshade roller shutters are lifted, the whole structure is simpler; large-scale production is facilitated, the production efficiency is improved, and the technical problems that in the prior art, hollow glass is complex in structure and low in production efficiency, the hollow glass is heated after being irradiated by sunlight, and the energy-saving and low-carbon effects are not ideal can be effectively solved.

The invention relates to the field of elevators, and discloses an elevator operation dynamic balance regulation and control device which comprises an elevator shaft, an elevator machine room, an elevator car and a car frame for bearing the elevator car, the elevator machine room is located at the top of the elevator shaft, and a traction power system and a control cabinet for driving the elevator car and the car frame to ascend and descend are assembled in the elevator machine room; the load monitoring group is mounted at the bottom of the car; the counterweight adjusting structure is arranged at the top end of the lift car; the liquid adjustable balance weight structure is composed of a balance weight liquid containing box, a liquid containing tank and a liquid conveying hose, the balance weight liquid containing box is arranged at the top of the lift car through a balance weight adjusting structure, and the high-performance microprocessor is carried in a control cabinet and based on a PLC or an embedded system. According to the dynamic balance regulation and control device for elevator operation, the unstable phenomena such as shaking and inclination in the elevator operation process are effectively reduced through precise regulation and control, and the riding comfort is greatly improved.

The present invention discloses an on-line moisture detection device and its application, as well as a tobacco leaf moisture detection device. The on-line moisture detection device includes a floating bracket, a moisture detector, and a balancing mechanism. The moisture detector is installed on the floating bracket, and the floating bracket is installed directly above the raw material conveying device in the field of application. Its installation height can be set according to the lowest stacking height of the materials piled on the conveying device, so that the moisture detector can be in direct contact with the raw materials to detect the moisture content of the raw materials passing through the moisture detector. The balancing mechanism can balance the weights of the moisture detector and the floating bracket, so that the floating bracket can automatically float up and down with the stacking height of the raw materials on the conveying device, reducing the extrusion force of the floating bracket on the raw materials, making the raw materials on the conveying device in a natural and fluffy state, avoiding inaccurate measurement caused by the extrusion of the raw materials, achieving the purpose of eliminating the influence on the detection accuracy caused by inconsistent raw material stacking heights, and improving the moisture detection accuracy.

The utility model provides a novel integrated counterweight base and shell, which is formed by plastic uptake and comprises a base plate and a coaming which is positioned at the edge of the base plate and is bent towards the same side direction of the base plate, and electrostatic protection films are arranged on the outer surfaces of the base plate and the coaming; the filler is fixed in the shell and is bonded with the inner surface of the shell; the bottom layer is fixed on the surface of the exposed part of the filler, and the filler is wrapped by the bottom layer and the shell; according to the utility model, the design structure is reasonable, the counterweight base shell made of the traditional metal material or the plastic of the injection molding process is replaced by the plastic material of the plastic uptake process, the rapid molding through the plastic uptake process is facilitated, and meanwhile, the shell can be used as a mold, so that the internal filler is molded according to the appearance of the shell, and the shell has the characteristics of smooth surface and attractive appearance; and different patterns can be formed on the surface of the shell in a plane processing manner such as printing, so that the diversity of the product appearance is increased.

The invention is suitable for the technical field of shock insulation equipment, and provides a composite buffer type shock absorber which comprises an upper fixing seat, a lower fixing seat, an elastic shock insulation unit and a plurality of transverse limiting buffers, the elastic shock insulation unit is arranged between the upper fixing seat and the lower fixing seat, the two ends of the elastic shock insulation unit abut against the friction faces of the fixing seats through sliding friction blocks, and the transverse shock absorption function is provided through sliding friction energy consumption. The four transverse limiting buffers which are arranged in an annular array mode are connected with the upper fixing base and the lower fixing base, the transverse reset capacity is enhanced and the displacement amount is limited through the elastic stretching and retracting of buffer springs and the synergistic effect of damping liquid, and the friction blocks are prevented from being disengaged; the multi-directional vibration reduction performance is further optimized, the vertical vibration isolation function and the transverse limiting function are achieved, and the problem that due to too large transverse deviation of a traditional vibration reducer, an elastic unit is torn is effectively solved.

The invention belongs to the technical field of photovoltaic supports, and discloses a load-bearing cable damping device and a flexible photovoltaic support, and the load-bearing cable damping device comprises a connecting assembly, a damping assembly and a counterweight assembly; through mutual cooperation of all the assemblies, when the bearing cable on the flexible photovoltaic support vibrates, the bearing cable vibration reduction device vibrates along with the bearing cable, and due to the fact that the bearing cable vibration reduction device is large in mass and low in vibration reduction frequency, vibration of the bearing cable vibration reduction device and vibration of the bearing cable are coupled; the vibration energy of the system is gradually transmitted to the bearing cable damping device from the bearing cable, the deflection of the bearing cable is effectively controlled, the hidden crack problem is avoided, the windproof effect is improved, and the service life of the flexible photovoltaic support is prolonged. And meanwhile, the counterweight assembly is detachably connected with the vibration reduction assembly, different counterweight masses can be introduced, the inherent frequency of the system can be conveniently changed, the counterweight of the counterweight assembly can be adjusted according to actual use requirements, the balance and stability of the system are ensured, and the vibration reduction effect can be uniformly exerted.

The invention relates to the technical field of trestle construction platforms, in particular to an offshore lamplight trestle construction platform which comprises a supporting column, a bridge floor is detachably installed at the upper end of the supporting column, limiting seats are fixedly connected to the upper end and the lower end of the supporting column, the outer surface of the supporting column is sleeved with a movable barrel, the outer surface of the supporting column is further sleeved with a balance weight ring, and the balance weight ring is located below the movable barrel. The outer surface of the movable cylinder is sleeved with an auxiliary ring, the outer surface of the auxiliary ring is rotationally provided with a plurality of extension rods, the outer surfaces of the extension rods are sleeved with floating belts, the floating belts can float above the sea level, the movable cylinder automatically ascends and descends along with the sea level under the buoyancy action of the floating belts, and the communication cylinder is kept in isobaric communication with an external water body. The water column pressure formed in the rising process of sea waves and tides can automatically drive the turbofan in the driving barrel to rotate, so that continuous mechanical energy output can be achieved without additional power, and then the cleaning ring is driven to circularly clean the outer surface of the supporting column.

The utility model discloses a movable workpiece defect scanning device, belongs to the technical field of industrial CT (Computed Tomography), and is used for solving the technical problem that industrial vertical scanning equipment is inconvenient to carry out outdoor detection on workpieces. The moving device comprises a moving carrier, a scanning device and a moving channel, the moving channel comprises a first channel and a second channel, the first channel and the second channel are detachably connected with the two ends of the scanning device respectively, each of the first channel and the second channel comprises a universal wheel and a workpiece conveying belt, and the scanning device comprises a rotating body and a rotating balance assembly. The workpiece defect scanning device disclosed by the utility model can be quickly moved and arranged indoors and outdoors, so that self-adaptive rotating balance is realized, and the scanning precision is improved.

The utility model discloses a wind power generation tower drum damping structure which comprises an outer ring, an inner ring is arranged in the outer ring, a gear ring is connected to the outer side of the inner ring in a bolting mode, a gear is connected to the outer side of the outer ring in a rotating mode through a bearing, and the surface of the gear is meshed with the gear ring through teeth. A user installs the device in a wind power generation tower drum through an installation plate and installation bolts, then a motor is started, the motor drives a gear to rotate, the gear drives an inner ring to rotate through a gear ring, meanwhile, the inner ring rotates in an outer ring through balls, and therefore the user can effectively and conveniently conduct rotation adjustment according to the wind direction; when the wind power generation tower barrel swings windward, the sliding blocks drive the sliding sleeves to slide on the surfaces of the sliding rods, the sliding blocks slide in the direction opposite to the swinging direction of the wind power generation tower barrel, meanwhile, the springs pull the sliding blocks, and therefore the swinging amplitude of the wind power generation tower barrel can be effectively and conveniently weakened.

The invention relates to a roller shutter structure. A roller shutter structure comprises a winding drum wound with curtain cloth, and a winding drum supporting piece, a torque assembly and an end supporting piece are arranged in the winding drum. The torque assembly enables the winding drum to bear torsion N; a force conversion part is arranged between the winding drum supporting piece and the end supporting piece, and the force conversion part can change the friction force F between the winding drum supporting piece and the end supporting piece by changing the pressure P in the axial direction; gravity G, torsion N and friction force F of the curtain cloth are simultaneously applied to the winding drum, N = G + / -F in the up-down movement process of the curtain cloth, and the curtain cloth is made to be static at any position without external force. The roller shutter structure can be installed by directly utilizing axial pressure, can adapt to installation of roller shutters with different widths and different fabrics, and is convenient to adjust and good in stability.

The invention discloses a multi-degree-of-freedom nonlinear energy trap damping device applied to an offshore floating fan. The multi-degree-of-freedom nonlinear energy trap damping device comprises a floating platform, a tower drum and a wind generating set, the floating type platform comprises three buoys which are arranged in an equilateral triangle mode, and the buoys are fixed to one another. Each buoy is provided with a nonlinear energy trap and a cylindrical stand column arranged outside the nonlinear energy trap in a sleeving mode. The nonlinear energy trap comprises a spherical grooved wheel track and a spherical mass block placed in the spherical grooved wheel track, the spherical grooved wheel track is fixed to the top of a supporting rod, and the bottom of the supporting rod is fixed to a buoy through a support; four annular buckles which are evenly distributed in a circumferential array mode are welded to the surface of the spherical mass block, four non-linear springs which are distributed in a circumferential array mode are evenly distributed on the periphery of the spherical grooved wheel track, and each non-linear spring is connected with the corresponding annular buckle. According to the invention, the six-degree-of-freedom motion response of the floating type wind turbine under the excitation of an external environment can be effectively reduced.

A low-power radio-frequency (RF) receiver is characterized by a decreased current consumption over prior art RF receivers, such that the RF receiver may be used in control devices, such as battery-powered motorized window treatments and two-wire dimmer switches. The RF receiver uses an RF sub-sampling technique to check for the RF signals and then put the RF receiver to sleep for a sleep time that is longer than a packet length of a transmitted packet to thus conserve battery power and lengthen the lifetime of the batteries. The RF receiver compares detected RF energy to a detect threshold that may be increased to decrease the sensitivity of the RF receiver and increase the lifetime of the batteries. After detecting that an RF signal is being transmitted, the RF receiver is put to sleep for a snooze time period that is longer than the sleep time and just slightly shorter than the time between two consecutive transmitted packets to further conserve battery power.