41results about How to "Reduce lifting speed" patented technology

The invention discloses an automatic reducing low-deformation offshore deep-water cage, relating to a cage for marine aquiculture. The invention is capable to reduce the deformation of the cage and the flow rate of the sea water inside the cage. The invention comprises a buoyancy frame, a cage, a sinking ring, a sinking block and an anchoring rope. A supporting and lifting control ring bigger than the buoyancy frame and the diameter of the sinking ring is arranged at the one second depth of the cylindrical cage; a water inlet and a water outlet are arranged in the pipe wall of the supporting and lifting control ring; a girdle rubber inner bag which regulates the lifting and descending of the cage is arranged in the ring pipe; an air-valve is installed in the rubber inner bag and connected with the air supply by a pressure hose; between the outer ring and the supporting and lifting control ring of the double-ring buoyancy frame, the bottom outline of the cylindrical cage and the bottom sinking ring, a plurality of flexible ropes are located and connected according to the ring at geometric proportion, and a netting is arranged among the connecting ropes of the three rings; and finally, a flexibly connected automatic reducing low-deformation offshore deep-water cage with a cylindrical inside and a two-cone platform outside is formed, the stress point of the anchoring rope of the cage is arranged at the supporting and lifting control ring.

The invention discloses a method for controlling the automatic landing and leveling of an unmanned aerial vehicle, a control scheme combining with an open loop correction with a closed loop feedback control. Each control link in a control loop is realized by obtaining a lifting speed expected value vyg(t), a lifting acceleration expected value ayg(t), an expected pitching angle thetag(t) and an elevator skewness command Deltag (t), particularly, the lifting speed open loop integral correction vygSemi is introduced, thereby the deviation of the actual lifting speed and the expected value when the plane touches down is reduced. The correction has obvious physical meaning and strong engineering application, is easy to realize, is suitable for the automatic landing and leveling control with the requirement of high precision, and effectively improves the landing safety.

An elongate moldable, flexible material or sealing body positioned between adjacent walls of a pickup truck and canopy mounted to a pickup truck bed, to permit windows of the pickup cab and canopy to be open for communication between the cab space and the canopy space, as well as to keep out wind, rain, dust and debris. The sealing body encompassing the perimeter of the windows of the cab and canopy. The sealing body also having a width dimension greater than its thickness dimension. Further, the sealing body having the ability to rotate about its central axis to accommodate varying dimensions of gaps between the cab wall and the canopy wall. The sealing body also having a fast compression rate and a compression memory. The slow expansion rate or “slow memory” giving the added benefit of avoiding abrasion of the sealing body against the cab or canopy walls due to vibration of the cab or canopy structure.

The invention provides a hydraulic hand pallet truck according to the defect that in the prior art, a hydraulic hand pallet truck is constant in lifting speed, cannot automatically adjust the lifting speed according to the cargo weight, and is inconvenient to steer and poor in braking performance, and belongs to the technical field of carrying equipment. The hydraulic hand pallet truck can be automatically adjusted to be at a low lifting speed when the cargo is heavy, so that the stability of the lifting process is guaranteed. The hydraulic hand pallet truck can be automatically adjusted to be at a high lifting speed when the cargo is light, so that the carrying efficiency of the pallet truck is guaranteed. Meanwhile, the bottom of a pallet fork of the hydraulic hand pallet truck is improved, and therefore the hydraulic hand pallet truck can conduct transverse movement, has good braking performance, and is prevented from sliding on the slope in the using process.

The invention discloses an emergency buffer device capable of preventing a lift car from rushing to the top and an elevator using the emergency buffer device. The emergency buffer device comprises an elevator derrick, a mounting seat, a servo motor, a power shaft and the like. The mounting seat is fixedly mounted on the right side of the top face of the elevator derrick, the servo motor is fixedly mounted on the mounting seat, and the power shaft is welded to the left end of an output shaft of the servo motor. Speed reduction calipers make contact with the power shaft, the speed reduction calipers exert resistance on the power shaft, so that the rotating speed of the power shaft and the rotating speed of devices on the power shaft are gradually decreased, meanwhile, through the effect of a first compression spring, a shifting clamping rod limits a movable limiting wheel, the rotating speed of the movable limiting wheel is decreased, the lifting speed of the lift car is decreased, then the lift car can stop in the gradual deceleration process, and the phenomenon that the lift car ascends too fast and rushes to the top when the braking effect of a brake is insufficient is prevented.

The invention relates to a construction process of floral tube dry filling piles with obvious engineering effect, low economic cost, high technical content and high resource utilization by improving the inherent characteristics of cement, soil strata, materials and the like. The process comprises the following steps of: (1) pore-forming process: 1, using dry pore-forming process for pore-forming piles above underground water level; 2, positioning a pore opening machine and a drill for pore-forming piles below underground water level; drilling in at low stroke and high rotary speed with clean water; reaching a drilling-in depth; lifting to a pore opening at unified stroke and high rotary speed with clean water; drilling into a pore bottom at unified stroke and high rotary speed with clean water; rotating at high speed and filling with cement mortar; and lifting to the pore opening at high rotary speed and low stroke after cement mortar returns to the pore opening; moving the drill; (2) the process of installation and pile molding by filling: adopting the following steps for installing pile pores and filling dry cement above or below water level: installing floral tubes; correcting the pore position of the floral tubes; filling the dry cement; and filling the dry cement to an elevation required by the design.

The invention discloses an anti-coiled water level monitoring device at coastal duckweeds of a dam used for a water conservancy project. The structure comprises a water purifier, an iron frame pedestal, an airbag metering tank, a suction pipe, a maintenance fence frame, a solar panel, and a liquid level buoy cylinder. The airbag metering tank and the liquid level buoy cylinder are cooperated. A liquid level rises and is flowed into a lower support column cylinder to raise a floating plate rod frame so as to detect liquid level data, and water is released through a drain hole and depressurization is performed. A heavy-duty drum pulls a razor magnet seat to go down around a spiral track to shave and clean duckweed attachments. At this time, the airbag metering tank obtains the liquid level data through the lifting of the floating plate rod frame, and a dredging effect is formed through surrounding sliding. A crescent knife edge of a razor plate is attached to a wall, and then a double-sided scraper synchronization effect of inner and outer wall magnetic absorption is formed through a magnet slot seat. Upper and lower displacements are prompted to form a gap isolation effect, an interference of water flow impurities is avoided and a liquid surface is effectively sucked from a bottom. And an effect of increasing equipment work precision is achieved.

The invention belongs to the technical field of automobile equipment, in particular to a novel lower limit spare tire lifter. The lifter includes a spare tire mount and a spare tire driving device mounted on the vehicle body, a spare tire mount is connected to the spare tire driving device by a wire rope, the spare tire driving device comprises a bracket, a driving shaft is pierced on the bracket,a rope rotary table is sleeved on the driving shaft, a rope notch is arranged on the rope rotary table, one end of the steel rope is fixed in the rope notch, and the rope rotary table is rotated to drive the spare tire mount to rise and fall through the steel rope; a lower limit locking mechanism is also installed in that spare tire driving device, the lower limit locking mechanism comprises a pawl rotatably arranged on the periphery of the rope rotary table, the front end of the pawl is matched with the rope notch, a torsion spring is arranged on the pawl, and the pawl is pressed down on therope rotary table through the torsion spring. The lower limit locks the spare tire lifter to increase the lower limit structure to avoid further reverse rise after the spare tire is lowered to the bottom.

The invention relates to a fabric cutting device capable of adapting to belt conveying. The fabric cutting device comprises a feeding device, the feeding device is provided with a fabric cutting frame, the fabric cutting frame is provided with a cutting device, the cutting device comprises a cutter sleeve on the fabric cutting frame, the lower portion of the cutter sleeve is provided with a cutter groove, the cutter groove is communicated with the cutter sleeve, and a cutter lifting pull rod matched with a cutter in the cutter groove is arranged in the cutter groove, the upper portion of the cutter lifting pull rod is hinged to a cutting rotating base, a cutting rotating rod is further hinged to the cutting rotating base, the other end of the cutting rotating base sleeves a sleeving shaft on a cutting mounting plate on the fabric cutting frame, the other end of the cutting rotating rod is connected to a cutting rotating sleeve, and the cutting rotating sleeve is matched with a cutting lifting motor on the cutting mounting plate. The cutter lifts or descends through the hinged cutter lifting pull rod, the cutting rotating rod and the cutting rotating base, a maximum lifting and descending range is limited, the lifting or descending speed can be slowed down through regulation, and damage to a conveying belt by the cutter is avoided greatly.

The invention discloses a multi-freedom manipulator teaching aid. The multi-freedom manipulator teaching aid comprises a base plate and a platform. An elevating mechanism is arranged between the base plate and the platform, the upper end surface of the platform is provided with a rotary base, the rotary base comprises a driven rotating disk and a driving rotating disk, a linkage rod is arranged between the driven rotating disk and the driving rotating disk, the driven rotating disk and the driving rotating disk are respectively rotationally fixed to the upper surface of the platform, the driven rotating disk is provided with a hydraulic driving type manipulator, and the hydraulic driving type manipulator comprises a clamping seat and a manipulator. The multi-freedom manipulator teaching aid has the following advantages: vertical ascending and descending of the rotary base can be realized, the stability of an elevating process is improved, the part structure and the hydraulic system of the manipulator are simpler, and the multi-freedom manipulator teaching aid is more suitable for a teaching aid.

The invention discloses a multifunctional scaling ladder truck and a working method.The multifunctional scaling ladder truck comprises a scaling ladder truck base, a rotary working platform, a scaling ladder set, an organ air bag channel and a scaling ladder transporting trolley, the scaling ladder set comprises a supporting scaling ladder and a movable scaling ladder, the supporting scaling ladder is sleeved with the movable scaling ladder, and the movable scaling ladder extends out of one end of the supporting scaling ladder; the supporting scaling ladder is of a V-shaped structure and is divided into a guide rail scaling ladder part and a counterweight scaling ladder part, the scaling ladder transportation trolley comprises a trolley underframe, an X-shaped connecting rod support and a trolley bearing cabin, and the organ air bag channel is of a convex structure and is laid between the supporting scaling ladder and the movable scaling ladder; the scaling ladder transportation trolley and the movable scaling ladder both adopt a traction rope driving mode, the speed is high, the efficiency is high, the lever effect generated in the working process of the scaling ladder transportation trolley is balanced through the design of the guide rail scaling ladder part and the balance weight scaling ladder part, and an air cushion scheme is automatically formed through the design of an organ air bag channel and a one-way door to provide buffering.

The invention discloses a light climbing mold steel frame system. The system comprises a main platform, a lower platform and a repair platform; the main platform comprises multiple climbing lead screws, a main support frame and a template support sliding module; the main support frame is detachably connected with a cast wall outer wall; the template support sliding module is slidingly mounted on the top surface of the main support frame, and moves in the transverse direction of the main support frame; a template is mounted on the side surface, towards a wall, of the template support sliding module; the climbing lead screws are mounted parallel to the wall; one ends of the climbing lead screws are detachably fixed on the wall, and the other ends are detachably connected with the main support frame; and the main support frame moves in the longitudinal direction of the climbing lead screws. The climbing system needs no operation of a climbing rod penetrating in a hydraulic oil cylinder; and the lead screws are adopted as climbing mechanisms, so that the fixation of the wall and the lead screws can be finished only by needing pins, the operation is simple, and the safety is high.

The invention discloses a pile forming method for a jet grouting pile in a flowing water sand layer. The pile forming method comprises the steps that S1, a geological drilling rig is adopted for drilling; S2, clay powder is adopted and mixed with efficient high-foaming bentonite, and first-time jet grouting jetting is conducted in a drilled hole; and S3, cement paste and water glass are adopted for conducting second-time jet grouting jetting in the drilled hole at the same time, the pressure of the second-time jet grouting jetting is smaller than that of the first-time jet grouting jetting, and the lifting speed of the second-time jet grouting jetting is larger than that of the first-time jet grouting jetting. According to the pile forming method, the second-time jet grouting jetting is adopted in the flowing water sand layer; the second-time jet grouting jetting is adopted in the same drilled hole, the clay powder and the bentonite paste of the first-time jet grouting jetting are used for stabilizing gaps between the sand layer and sand grains filling the sand layer firstly, and the sand layer is changed into a sand and soil mixture; and an efficient water reducing agent is added in the cement paste of the second-time jetting, the cement paste of the second-time jet grouting jetting can be prevented from being diluted or washed away or taken away by underground water before being solidified, the success rate of pile forming is increased, and the quality of the jet grouting pile is guaranteed.

The invention discloses an anti-falling system for a lifting illumination device. The anti-falling system for the lifting illumination device is characterized in that the anti-falling system comprises a lifting illumination module, a baffle module, an alarm module, a speed reduction module and a power-off module; and the lifting illumination module is connected with the power-off module and also connected with the speed reduction module and the alarm module, and the alarm module is connected with the baffle module. Since the alarm module and the power-off module are connected to the lifting illumination module, the lifting illumination module can be powered off in time when falling suddenly, and electric shocks are avoided; and the speed reduction module can decrease the lifting speed of the lifting illumination module. The anti-falling system for the lifting illumination device is simple in structure, convenient to use, safe, efficient, and stable in operation.

The invention discloses a differential windlass lifting device, and belongs to the field of lifting machinery. The differential windlass lifting device comprises a bearing base, a drum shaft, a fixedpulley module, a movable pulley module, a lifting rope and a speed reducer. The differential windlass lifting device is characterized by further comprising a differential drum set, a coupling and a motor; the differential drum set is fixed on the drum shaft, and is integrally molded by a first differential drum and a second differential drum; the diameter of the first differential drum is larger than the diameter of the second differential drum; one end of the lifting rope is fixed at the end part of the first differential drum, and the other end is fixed at the end part of the second differential drum; one end of the drum shaft is connected with the bearing base, and the other end is connected with the speed reducer; one end of the coupling is connected with the speed reducer, and the other end is connected with the motor; and a brake is mounted on the coupling. Through use of the differential drum set and a specific rope winding mode, the high-capacity and low-speed lifting of the lifting mechanism can be realized, and the lifting stability and safety are guaranteed.