73results about How to "Increase falling speed" patented technology

A current-to-voltage converter which is used to receive an input current and to generate an output voltage accordingly comprises a current tracking bias circuit, a current-to-voltage unit, and a voltage clamp bias circuit. The current tracking bias circuit generates a first bias according to the input current. The current-to-voltage unit receives the first bias and the input current, and generates the output voltage according to the input current, wherein the first bias determines a range of the input current, the current-to-voltage unit has a first current control device, and the first current control device changes a current conduction level thereof in response to the first bias, such that a rising or falling speed of the output voltage is enhanced. The voltage clamp bias circuit clamps voltage levels of two ends where the voltage clamp bias circuit is connected to the current-to-voltage unit.

The invention provides a secondary relief valve, a hydraulic lowering system for cranes and a crane. The secondary relief valve comprises a valve body, a spool and a pressure regulator, the pressure regulator comprises a first-stage pressure-regulating spring and a pressure-regulating plug which are coaxial with the spool, one end of the first-stage pressure-regulating spring abuts against the end of the spool, the other end of the first-stage pressure-regulating spring abuts against the pressure-regulating plug, the pressure regulator also comprises a second-stage pressure-regulating spring, the diameter and length of the second-stage pressure-regulating spring are less than the diameter and length of the first-stage pressure-regulating spring, and the stiffness coefficient of the second-stage pressure-regulating spring is greater than the stiffness coefficient of the first-stage pressure-regulating spring. The pressure-flow relation of the secondary relief valve has two states; when the secondary relief valve is applied on the hydraulic lowering system for cranes, the hydraulic lowering system for cranes has two lowering control modes, i.e. self-weight lowering and powered lowering; the self-weight lowering mode can be adopted for low-speed lowering in order to achieve good lowering control performance; if lowering needs to be accelerated, an accelerator can be stepped to increase flow, consequently, powered lowering is carried out, and the lowering speed is increased.

The invention discloses a rotary compressor and a bearing component thereof. The bearing component comprises a bearing, a discharge valve plate, a lift limiter and an elastic piece, wherein an exhaust port is formed in the bearing, one end of the discharge valve plate is connected with the bearing, and the other end of the discharge valve plate covers the exhaust port; the lift limiter is arranged on the one side, away from the exhaust port, of the discharge valve plate, the elastic piece is arranged between the discharge valve plate and the lift limiter, and the part, corresponding to the exhaust port, of the elastic piece and the discharge valve plate are separated from each other. According to the bearing component, the bearing component is simple in structure. When the bearing component is applied in the rotary compressor, the falling back speed of the discharge valve plate is quickened under high-frequency revolving condition, the backflow of refrigerant gas is decreased, on the premise that the low-frequency energy efficiency of the rotary compressor is not lowered, the high-frequency energy efficiency is improved, the tremor of the discharge valve plate and the impact velocity of the discharge valve piece for the lift limiter are decreased by virtue of the bearing component, so that the running noise of the rotary compressor is lowered.

The invention relates to a flue gas dust removal device comprising a casing and a filter element. The filter element comprises a rotating part and a blade, a first cavity is arranged in the rotating part, a second cavity is arranged in the blade, the blade is provided with an opening, the rotating part is in communication with the blade, a conical vertical rod connected with the rotating part is arranged in the second cavity, a baffle is slidably arranged on the inner wall of the second cavity, a tension spring is connected between the baffle and the rotating part, the baffle is provided witha through hole, a water pipe is connected with the baffle, the water pipe extends through the opening to the outside of the blade, a pressure valve is arranged on the side wall of the water pipe, andthe water pipe is connected with an internal hollow water ball. The water ball has a water outlet hole, a cleaning block is slidably arranged on the outer wall of the blade, a connecting rod is connected between the cleaning block and the water ball, a pressure block is slidably arranged on the inner wall of the opening, a spring is connected between the inner wall of the blade and the pressure block, a wind wheel is arranged in the casing, the wind wheel drives the rotating part to rotate, the bottom of the casing is provided with a water tank, and the rotating part is communicated with the water tank by a connecting pipe. Th e flue gas dust removal device realizes the automatic cleaning of the filter element.

The mosquito net elevator includes a driver, a driving gear and elevating pulleys in the same number as the drawing points. It features that around the driving gear there are drawing units in the same number as the drawing points. Each drawing unit consists of one casing, one middle shaft, one driven gear, one reel and one piece of elevating rope. It also features that between the driven gear and the reel in each drawing unit there is an overload separator and one brake. The elevator is superior in that each drawing unit is used to draw a piece of rope and thus there is no twisting failure and that the elevator elevates the net in balanced and regular mode.

The invention discloses a method for braking and boosting by the characteristics of a hydraulic system. The hydraulic system comprises a hydraulic motor, an oil inlet path, an oil returning path, a hydraulic pump, a first solenoid valve, a second solenoid valve, a third solenoid valve and an energy accumulator, wherein the oil inlet path is connected with a first cavity, and the oil returning path is connected with a second cavity; the hydraulic pump charges oil into the hydraulic motor via the oil inlet path; the first solenoid valve controls the oil inlet path to be communicated with the hydraulic pump; the oil inlet path is connected to the first cavity by the third solenoid valve; and the energy accumulator is connected to the first cavity by the third solenoid valve and is connected to the second cavity by the second solenoid valve. In a hydraulic winch adopting the hydraulic system, a winding drum can be braked and buffered in the cable unreeling process, the equipment maintenance cost is lowered, the efficiency on measuring a vertical section is improved, and the A cavity of the hydraulic motor can be subjected to pressure supplementation when a falling body falls so as to assist a cable unreeling process in overcoming the rotational inertia of the winding drum, thereby quickening the falling speed of the falling body.

The invention belongs to the field of adaptive optics, and discloses a transitional grey level driving method for increasing response speed of a liquid crystal wave-front corrector. The transitional grey level driving method is characterized in that phase modulated quantity of the liquid crystal wave-front corrector is set to range from 1.2 wavelengths to 1.6 wavelengths, a grey level of a transitional phase is set for an optional group of initial phase and target phase on pixels, the grey level is larger than difference of the initial phase and the target phase, the characteristic that phase response speed of liquid crystal at a front stage is fast is adopted, the position corresponding to a target is reached, and at the moment, a grey level corresponding to the target phase is applied to the target so as to keep a target phase value. The key of the transitional grey level driving method is measurement to a transitional grey level array GT by the liquid crystal front-wave corrector, an initial grey scale and a transitional grey scale corresponding to a target grey scale are solved in real time according to the GT, accordingly, the liquid crystal front-wave corrector can be driven by the transitional grey level to quickly respond in place, the target grey scale is applied, wave front is stabilized, and driving of the next period can be carried out.

The invention discloses an electromagnetic landing system of an aircraft carrier. A stator rail for a linear motor is arranged under a landing deck, a landing trolley is arranged on a rotor of the linear motor, a landing platform is arranged on the landing trolley, and the height of the landing platform can be adjusted to improve the capture rate of the landing platform. A wedge-shape opening groove is further formed in the landing platform, the wedge-shaped opening groove is matched with a wedge-shape tenon in the front edge of an air craft landing gear, and the landing platform is further provided with a fine adjusting device and a controlling device. The electromagnetic landing system has the advantages that the two wedge-shaped parts can approach to each other but cannot be in contact under the action of magnetic repulsive force to achieve a buffer function, so that aircrafts can land safely. In addition, the electromagnetic landing system is quick in response speed, safe and reliable.

The invention relates to an advanced ceramic pipe type defueling pump, comprising a pump cylinder, a plunger piston, an upper traveling valve assembly, a lower traveling valve assembly and a strandingvalve assembly. The advanced ceramic pipe type defueling pump is characterized in that the inner wall of a steel-based pipe of the pump cylinder is provided with an advanced ceramic protection layerwith high temperature resistance, abrasion resistance and corrosion resistance, which is used as an lining; the outer surface of a rod body of the plunger piston is previously provided with grooves atintervals, alloy coatings with abrasion resistance and corrosion resistance is sprayed on the grooves, and zirconia toughening alumina ceramic rings are embedded into the surfaces of the alloy coatings inside the grooves.

The invention relates to a liquid cargo tank pressure / vacuum valve, in particular to a breather valve of a liquid cargo tank used on a floating production storage and offloading (FPSO) system of an ultra large oil tanker. The high-speed breather valve for the oil tanker mainly comprises a pressure valve, a vacuum valve and a fluid director, wherein the pressure valve is formed by connecting a flow guiding body, an upper valve body and a three-way lower valve body in three stages in series; the flow guiding body is fixedly connected to the upper part of the upper valve body; the vacuum valve is fixedly connected with the side face port of the three-way lower valve body; a valve rod is arranged in the upper valve body and a flow guiding body cavity; the top of the valve rod is extended out of the flow guiding body and is fixedly connected with the fluid director; a magnetism adjusting rod is arranged in the valve rod; a permanent-magnetic ring which is sleeved on the valve rod and corresponds to the magnetism adjusting rod is arranged in the flow guiding body cavity; the lower part of the valve rod is connected with a weight; and the valve rod below the fluid director is fixedly connected with a damping fin. Oil gas can be smoothly exhausted by stably opening the valve and the impact force of the fluid director can be reduced when the valve is closed, so hammering phenomenon is eliminated and the safety of life and property is guaranteed.

The invention relates to the technical field of environmental protection equipment, and discloses cyclone type environment-friendly dust removal equipment convenient for dust removal. The equipment comprises a dust removal box, a dust removal cavity is arranged at the bottom end in the dust removal box, a guide rod is arranged in the dust removal cavity in the vertical direction, a guide sleeve isslidably arranged in the middle of the guide rod, an upper connecting rod hinged to the upper end of the right side of the guide sleeve, the upper end of the upper connecting rod is hinged to the bottom end of a rotating plate, the rotating plate is rotationally arranged on the inner wall of the dust removal box, a lower connecting rod is hinged to the lower end of the right side of the guide sleeve, a moving plate is hinged to the tail end of the lower connecting rod and slides in a sliding groove formed in the bottom end in the dust removal box through a sliding block, a swing rod is slidably arranged in the middle part of the dust removal box, the left side of the swing rod penetrates through the dust removal box and is connected with a contact ball, and the left end of the contact ball contacts with a cam. A liquid spraying cavity sprays a liquid while moving left and right, effective humidification of dust is achieved, the falling speed of the dust is increased, and meanwhile linkage type movement of the rotating plate and the moving plate is achieved through the arrangement of the guide sleeve and the guide rod.

Provided is a multifunctional rope releasing device. The multifunctional rope releasing device comprises a power transmission system or a hydraulic transmission system or a pneumatic transmission system, a reel or a rotating shaft, and a descent control device. A rotating shaft of a motor of the power transmission system or the hydraulic transmission system or the pneumatic transmission system candrive the reel or the rotating shaft to rotate through a transmission mechanism. The motor is an electric motor or a hydraulic motor or a pneumatic motor. The power transmission system comprises theelectric motor. A round ring is sleeved on the reel or the rotating shaft. The round ring can rotate around the reel or the rotating shaft. The round ring is provided with a blocking surface. The reelor the rotating shaft is provided with a blocking piece. The descent control device is arranged on the round ring. A slow descent rope of the descent control device extends out from the descent control device and is coiled on the reel or the rotating shaft, and a cable connected with the electric motor or a motor or a magnetic exchange valve is connected with a power supply through an electricalcontrol system.

The invention discloses a multifunctional elevator auxiliary rescue device. The multifunctional elevator auxiliary rescue device comprises a lift car, rails are arranged on the left side and the right side of the lift car, a first sliding groove is formed in the sides, facing the lift car, of the rails, sliding rods are arranged on the lift car, first rolling wheels are installed at the outer ends of the sliding rods through wheel carriers, a first piston cylinder is arranged in the middle of the lift car and provided with first an air inlet, second piston cylinders are arranged on the left side and the right side of the first piston cylinder, movable rods are arranged in the second piston cylinders, connecting blocks are arranged at the outer ends of the movable rods, second rolling wheels are installed on one sides of the connecting blocks through elastic movable structures, movable blocks are arranged below the first piston cylinder, air leakage control devices are arranged between the movable blocks and the second piston cylinders, and a first one-way valve is arranged in the first air inlet. According to the multifunctional elevator auxiliary rescue device, under the action of gravitational acceleration in the elevator falling process, the first rolling wheels move along the wavy structure of the first sliding groove, so that the speed of external air entering the first piston cylinder is increased, pressure perpendicular to the first sliding groove is applied to the second rolling wheels, and therefore full-mechanical passive braking is achieved, and rescue of people in the interior of an elevator is achieved.

The invention belongs to the technical field of communications, and discloses an intelligent WIFI router device based on the 3G communication technology. The intelligent WIFI router device is used for solving the problems that an existing router is high in manufacturing cost and low in radiating efficiency. The intelligent WIFI router device comprises a shell. The shell comprises a lower shell body and an upper cover. Installation columns are installed inside the lower shell body. Installation holes are formed in the lower top surface of the upper cover. Each installation column comprises a first boss and a second boss, and the diameter of each first boss is smaller than the diameter of the corresponding second boss. A radiating device arranged above a chip is installed on a PCB, and the radiating device comprises an upper shell and a lower shell arranged above the chip. The upper shell is arranged above the lower shell, and a vacuum steam cavity is formed between the upper shell and the lower shell. A spiral flow guide groove is formed in the inner wall of the steam cavity, a liquid sucking core matched with the spiral flow guide groove is arranged on the outer surface of the spiral flow guide groove, and the steam cavity is filled with working fluid.

The electric mosquito net elevating mechanism includes at least two electric elevators and each of the electric elevators includes a motor, a casing, a reel, a piece of elevating rope and a brake to prevent the reel from rotating inversely. The reel is connected to the brake, the the elevating rope has a end connected to the reel and the other end connected to the lower edge of the net via a string of rings. Each electric elevator draws only one elevating rope, and this can prevent twisting of rope and ensure the levelness of the elevated net.

The invention discloses a coulter mixer with a directional spraying and wetting function, the coulter mixer comprises a base, a rack, a feed port and a discharge port, the base is a bottom support structure of the device, the upper end of the base is provided with the cylindrical rack, the rack is internally provided with a mixing structure and a cutting ejection structure, and the mixing structure and the cutting ejection structure are arranged on the rack. A directional spraying and wetting structure is arranged in the mixing structure, two feeding ports are symmetrically formed in the upper end of the base, and an arc-shaped discharging port is formed in the side face of the base; the cutting ejection structure can eject the materials, the small viscous materials have a breakdown effect on the large viscous materials, water can enter the large viscous materials through the breakdown positions of the large viscous materials, and therefore powder materials in the large viscous materials can make contact with the water to be mixed. The large viscous materials in the suspended state can deflect and rotate after being impacted, and therefore the contact area of the large viscous materials and water is increased.

The invention relates to a building with a multifunctional reel-off device. The building with the multifunctional reel-off device comprises the multifunctional reel-off device. The multifunctional reel-off device comprises a motor, a coiling block or a rotary shaft and a pull rope. The motor can drive the coiling block or the rotary shaft to rotate, a circular ring sleeves the coiling block or the rotary shaft and can rotate around the coiling block or the rotary shaft, a barrier surface is arranged on the circular ring, a barrier piece is arranged on the coiling block or the rotary shaft, one end of the pull rope is connected to the circular ring, and after the barrier piece on the coiling block or the rotary shaft locks the barrier surface on the circular ring, the pull rope extends out of the circular ring and winds the coiling block or the rotary shaft, extends out of the coiling block or the rotary shaft, and is connected to a counter weight.

The invention discloses an anti-falling winding type elevator which comprises an elevator body. A lifting cavity which is through in the front-back direction and provided with an upward opening is formed in the elevator body, a lifting bottom plate is arranged in the lifting cavity in an up-down sliding manner, and anti-falling devices are arranged at the lower side of the lifting bottom plate ina bilateral symmetry manner; each anti-falling device comprises rotating cavities which are arranged at the lower side in the lifting bottom plate in a bilateral symmetry manner and provided with downward openings, chain wheel cavities are formed in the rear sides of the rotating cavities, and driven chain wheel shafts extending into the chain wheel cavities are rotatably arranged at the sides, away from the symmetry center, of the front end walls of the rotating cavities; and anti-falling rotating plates are fixedly arranged at the front sides of the outer circle faces of the driven chain wheel shafts. According to the anti-falling winding type elevator, when an elevator cargo loading box falls at an overspeed or falls accidentally, the anti-falling devices and rope clamping devices can be automatically started, the cargo loading box can be effectively prevented from falling continuously, and meanwhile, a broken steel wire rope can be clamped.

The invention provides multifunctional rope paying-off equipment. The multifunctional rope paying-off equipment comprises a shell, a motor, a winding drum or a rotating shaft, and a pull rope, wherein the motor, the winding drum or the rotating shaft, and the pull rope are arranged in the shell; the motor can drive the winding drum or the rotating shaft to rotate; the winding drum or the rotating shaft is sleeved with a circular ring, and the circular ring can rotate around the winding drum or the rotating shaft; the circular ring is provided with a blocking surface, and the winding drum or the rotating shaft is provided with a blocking piece; and one end of the pull rope is connected to the circular ring, and after the blocking piece of the winding drum or the rotating shaft clamps the blocking surface of the circular ring, the pull rope extends out of the circular ring to be wound on the winding drum or the rotating shaft and then extends out of the winding drum or the rotating shaft to be connected with a weight.

The invention discloses multifunctional rope unwinding equipment. The multifunctional rope unwinding equipment comprises a shell body, a motor, a reel and a pull rope, wherein the motor, the reel andthe pull rope are arranged in the shell body; the motor is capable of driving the reel to rotate; a circular ring sleeves the reel; the circular ring is capable of rotating around the reel; a stoppingsurface is arranged on the circular ring; a stopping element is arranged on the reel; one end of the pull rope is connected to the circular ring; the pull rope extends out from the circular ring andis wound on the reel, and then extends out from the reel and is connected with a heavy object; a cable connected with the motor is connected with a power supply through a main contact of a contactor;and a coil of the contactor is connected with a PLC and the power supply to form a loop.

The invention discloses a small explosive roll loading and clamping machine. The small explosive roll loading and clamping machine comprises a rack component. A tidying component, a transition device, an arraying device and a plate drawing component are sequentially arranged on the rack component from top to bottom. The output end of the tidying component is connected with the input end of the transition device, the output end of the transition device is connected with the input end of the arraying device, and the output end of the arraying device is connected with the input end of the plate drawing component. The small explosive roll loading and clamping machine achieves automatic tidying, transitional temporary storage and arraying of explosive rolls, the explosive rolls are arrayed in a medium bag manner, and preparation is made for following medium bag stacking, following medium bag packaging is facilitated, the number of operators is reduced, the tidying speed of the explosive rolls is high, the working efficiency is improved, the automatic production level is improved, the labor intensity of workers is greatly lowered, the cost is low, and safety is higher.

The invention discloses multifunctional rope reeling-off equipment which comprises a shell, a motor, a coiling block or rotating shaft and a descent control device. The motor, the coiling block or rotating shaft and the descent control device are arranged in the shell. The motor can drive the coiling block or rotating shaft to rotate through a transmission mechanism. The coiling block or rotatingshaft is sleeved with a circular ring, the circular ring is provided with a blocking face, the coiling block or rotating shaft is provided with a blocking piece, the descent control device is arrangedon the circular ring, a descent control rope of the descent control device is extended out of the descent control device to be coiled to the coiling block or rotating shaft and then extended out of the coiling block or rotating shaft, and a cable connected with the motor is connected with a power source through an electrical control system.

Provided is multifunctional rope pay-off equipment. The multifunctional rope pay-off equipment comprises a shell body, a hydraulic transmission system, reeling barrels or rotating shafts and a slow descending device. The hydraulic transmission system, the reeling barrels or the rotating shafts and the slow descending device are arranged inside the shell body. The hydraulic transmission system comprises a hydraulic motor which can drive the reeling barrels or the rotating shafts to rotate. The reeling barrels or the rotating shafts are sleeved with circular rings which can rotate around the reeling barrels or the rotating shafts. Blocking faces are arranged on the circular rings, and blocking members are arranged on the reeling barrels or the rotating shafts. The slow descending device is arranged on the circular rings. After slow descending ropes of the slow descending device extend out from the slow descending device and are wound around the reeling barrels or the rotating shafts, the slow descending ropes extend out from the reeling barrels or the rotating shafts and are connected with heavy items. The multifunctional rope pay-off equipment is connected with a section of controlling cable which is connected with a controller and extends out of the shell body or the multifunctional rope pay-off equipment is connected with a section of controlling pulling rope which extends out of the shell body.

The invention aims to provide a high-dynamic-response low-rebound permanent magnet-electromagnetism synergistic coupling high-speed electromagnetic valve which comprises a shell and an iron core, the iron core is installed in the shell, an axial center through hole is formed in the middle of the iron core, a spring limiting sleeve is installed in the axial center through hole, an armature and a reset spring cavity are sequentially arranged below the iron core, and a spring is installed in the reset spring cavity. The upper portion of the valve rod is located in a spring limiting sleeve, an upper disc permanent magnet, a lower disc permanent magnet and a spring gasket are arranged in the spring limiting sleeve, and a giant magnetostrictive body is installed between the upper disc permanent magnet and the lower disc permanent magnet. By means of the structure, the electromagnetic force generated when the armature is attracted can be effectively increased, the dynamic response speed is increased, rapid demagnetization of the iron core is facilitated, and the release speed of the armature is increased; and meanwhile, the bounce degree of the armature during attraction and seating can be reduced, and the working stability of the high-speed electromagnetic valve is improved on the basis that the dynamic performance of the high-speed electromagnetic valve is improved.

The invention discloses a multifunctional rope releasing device. The multifunctional rope releasing device comprises a shell, a hydraulic transmission system, coiling blocks or rotating shafts and pull ropes. The hydraulic transmission system, the coiling blocks or the rotating shafts and the pull ropes are arranged in the shell. The hydraulic transmission system comprises a hydraulic motor. The hydraulic motor, the coiling blocks or the rotating shafts and the pull ropes are arranged in the shell. The hydraulic motor can drive the coiling blocks or the rotating shafts to rotate, the coiling blocks or the rotating shafts are sleeved with circular rings, and the circular rings can rotate around the coiling blocks or the rotating shafts. The circular rings are provided with blocking faces. The coiling blocks or the rotating shafts are provided with blocking pieces. One ends of the pull ropes are connected to the circular rings. After the blocking pieces on the coiling blocks or the rotating shafts clamp the blocking faces on the circular rings, the pull ropes extend out of the circular rings to be wound on the coiling blocks or the rotating shafts to extend out of the coiling blocks or the rotating shafts to be connected with weights.

The invention discloses multifunctional rope releasing equipment. The multifunctional rope releasing equipment comprises a shell, a motor, a winding drum, and a descent control device; the motor can drive the winding drum to rotate; the winding drum is sleeved with a ring, and the ring can rotate around the winding drum; a stop surface is arranged on the ring; a stop piece is arranged on the winding drum; the ring is provided with the descent control device; a slow descending rope of the descent control device is wound on the winding drum to connect with a weight after extending from the descent control device; a cable connected with the motor is connected with a power supply through a main contact point of a contactor; a coil of the contactor is connected with a PLC and the power supply to form a loop; and a button or a touch screen connected with the PLC can be used for controlling closing of the main contact point of the contactor and electrifying the motor to forwards or reverselyrotate.

The invention relates to a building with a multifunctional reel-off device. The multifunctional reel-off device comprises a motor, a coiling block or a rotary shaft and a descent control device. The motor can drive the coiling block or the rotary shaft to rotate through a transmission mechanism, a circular ring sleeves the coiling block or the rotary shaft and can rotate around the coiling block or the rotary shaft, a barrier surface is arranged on the circular ring, a barrier piece is arranged on the coiling block or the rotary shaft, the descent control device is arranged on the circular ring, a slow descent rope of the descent control device extends out of the descent control device and winds the coiling block or the rotary shaft, extends out of the coiling block or the rotary shaft, and is connected to a counter weight, the multifunctional reel-off device is connected to a section of a control cable or a control pull rope, and the control cable or the control pull rope extends downward to the lower side or the outer side of the building to be used.

Provided is a building with multifunctional rope pay-off equipment. The building with the multifunctional rope pay-off equipment comprises the multifunctional rope pay-off equipment. The multifunctional rope pay-off equipment comprises a hydraulic transmission system, reeling barrels or rotating shafts and pulling ropes. The hydraulic transmission system comprises a hydraulic motor which can drive the reeling barrels or the rotating shafts to rotate. The reeling barrels or the rotating shafts are sleeved with circular rings which can rotate around the reeling barrels or the rotating shafts. Blocking faces are arranged on the circular rings, and blocking members are arranged on the reeling barrels or the rotating shafts. One ends of the pulling ropes are connected to the circular rings. After the blocking faces on the circular rings are clamped by the blocking members on the reeling barrels or the rotating shafts, and the pulling ropes extend out from the circular rings and are wound around the reeling barrels or the rotating shafts, the pulling ropes extend out from the reeling barrels or the rotating shafts and are connected with heavy items.