28results about How to "Improve traction efficiency" patented technology

The invention provides a traction device and a control method.The traction device comprises a support, a sliding assembly, a linear motor and a clamping mechanism, the support is arranged on a traction plane, the sliding assembly is limited to move in the direction parallel to the traction plane, the traction end of the linear motor is connected with the sliding assembly, and the sliding assembly is dragged through controlled movement of the traction end; therefore, the clamping mechanism and the clamped tool move along with the sliding assembly. According to the traction device, due to the fact that the linear motor is matched with the sliding assembly, the problems that a traditional driving mode is insufficient in load capacity and limited in power output are solved, the limiting moving direction of the sliding assembly ensures that the tool is stable, further, the clamping mechanism ensures that the tool does not generate displacement or positioning errors in the clamping state, and by means of the technical means, the machining efficiency is improved. The problems that an existing traction device is insufficient in load, low in efficiency, poor in stability and inaccurate in tool positioning in the heavy tool traction process are effectively solved.

The invention provides a rail train traction and brake control method and system, and the method comprises the steps: firstly monitoring the wheel rotation speed and motor torque of a rail train, inputting a state observer with pole configuration to estimate an adhesion coefficient in real time, and combining the creep speed at the current moment to obtain a traction and brake coefficient; calculating the stick-slip slope of the adhesion characteristic curve by using an adhesion coefficient-creep speed empirical formula; the method comprises the following steps: setting a target creep speed by adopting a steepest gradient method, inputting the target creep speed and a current creep speed into a neural network controller, outputting a rail train correction torque, combining the rail train correction torque with a current actual braking torque to obtain a target torque, and controlling a rail train motor through a DTC method so that the actual torque is consistent with the target torque. And the motor torque and the wheel speed are input into the state observer to form closed-loop control. The adhesion coefficient is estimated and optimized in real time through the control method, the train traction and braking efficiency is remarkably improved, and a safer and more efficient solution is provided for modern rail transit.

The invention discloses a traction device for clinical use in the orthopedics department and a using method of the traction device, and relates to the technical field of medical assistion.The traction device comprises a supporting ring, a plurality of telescopic rods are fixedly arranged at the top of the supporting ring, a traction ring is fixedly arranged at the tops of the telescopic rods, and an air bag is arranged at the top of the traction ring; two buffer grooves are formed in the top of the supporting ring, and two air outlet grooves are formed in the side wall of the supporting ring. Through the arrangement of a trapezoidal block, two release springs and two L-shaped switching rods, a patient can quickly release traction by himself / herself, the safety is high, the operation is simple, convenient and quick, and through the arrangement of a buffer plate, a limiting sliding groove, a first one-way plate, a first torsional spring, a first connecting shaft, a second one-way plate, a second connecting shaft, a second torsional spring and a sealing plate, the safety of the patient is improved. Rapid contact traction is achieved when a patient feels uncomfortable, too fast collision and friction can be avoided during cervical vertebra reduction, and the spine safety of the patient is guaranteed.

The utility model relates to the technical field of airport luggage traction, in particular to a luggage barrow traction system which comprises a tractor, a control center and at least one auxiliary device, the tractor is used for dragging a luggage barrow, and the auxiliary device is used for monitoring the environment conditions of the tractor and the periphery of the luggage barrow. The tractor, the control center and the at least one auxiliary device communicate with one another. The luggage barrow traction system is provided with at least one auxiliary device which is used for monitoring the environment conditions around the tractor and the luggage barrow, the tractor, the control center and the at least one auxiliary device communicate with each other, and the auxiliary device can enable the tractor and the luggage barrow to avoid obstacles. The luggage barrow is prevented from colliding with an obstacle in the traction process of the tractor, the traction and movement efficiency of the tractor on the luggage barrow is higher, in addition, after the auxiliary device is arranged, workers do not need to conduct on-site commanding, on-site accidents are reduced, and manpower is saved.

The invention belongs to the technical field of traction equipment, and discloses aluminum alloy profile processing and production traction equipment which comprises a mounting seat, a first mounting groove is formed in the top of the mounting seat, a plurality of rollers are rotatably connected to the inner wall of the first mounting groove, and two supporting plates are fixedly connected to the top of the mounting seat; a mounting plate is fixedly connected to the tops of the two supporting plates, a mounting frame is fixedly connected to the outer wall of the mounting plate, a hydraulic cylinder is fixedly connected to the top of the mounting frame, the output end of the hydraulic cylinder penetrates through the mounting frame and is slidably connected with the mounting frame, a fixing plate is fixedly connected to the output end of the hydraulic cylinder, and a motor is fixedly connected to the inner wall of the fixing plate. And a driving assembly is installed at the output end of the motor, the driving assembly penetrates through the mounting plate and extends to the outer side of the mounting plate, a fourth bevel gear is installed on the outer wall of the driving assembly, and a shaft sleeve is movably installed on the driving assembly.

The utility model discloses a flexible composite pipe traction device, and belongs to the technical field of flexible composite pipes, the flexible composite pipe traction device comprises a base, and the top of the base is rotationally connected with a support; the device is novel in design and ingenious, the pressure sensors are arranged in the first arc-shaped clamping piece and the second arc-shaped clamping piece, in the clamping process of the flexible composite pipe, the magnitude of traction force can be monitored in real time, the magnitude of the traction force is fed back to the controller through the pressure sensors to automatically adjust the clamping force of the clamping part, and therefore the clamping force of the flexible composite pipe is automatically adjusted. In addition, soft silica gel is arranged on the inner side of the first arc-shaped clamping piece and the inner side of the second arc-shaped clamping piece, the soft silica gel is made of soft materials, self-adaptive clamping can be carried out according to the appearance of the flexible composite pipe, rigid damage to the flexible composite pipe is avoided, and then the safety and stability of the traction process are guaranteed. The problem that the flexible composite pipe is damaged in the traction process is solved, the traction efficiency and the pipeline construction quality are improved, and the practicability of the device is greatly improved.

The invention relates to the technical field of traction equipment, and discloses novel alloy grounding material traction equipment which solves the problem that existing traction equipment is poor in using effect, the novel alloy grounding material traction equipment comprises a first suspension arm and a second suspension arm, and the first suspension arm and the second suspension arm are sleeved with protective covers. A mounting frame is fixedly arranged at the bottom end of the first suspension arm and the bottom end of the second suspension arm, a combined traction mechanism is arranged at one end of the side edge of the mounting frame, a tensioning mechanism and an anti-disengagement holding mechanism are fixedly arranged at the other end of the side edge of the mounting frame, and the combined traction mechanism is composed of a rapid traction assembly, a low-speed tensioning traction assembly and an auxiliary pressing assembly; the rapid traction assembly, the low-speed tensioning traction assembly and the auxiliary pressing assembly are all connected to the side edge of the mounting frame, and the auxiliary pressing assembly is located at the top of the low-speed tensioning traction assembly; by means of the traction equipment, high-altitude traction of the ground wire can be achieved, the ground wire can be pre-tightened, and meanwhile large-span falling of the ground wire due to breakage is avoided.

The utility model provides an assembled paper guide rope wheel device, and belongs to the technical field of paper guide rope wheels. Comprising a rope wheel body; the two rotating shafts are arranged on the left side and the right side of the rope wheel body; the two rotating plates are arranged on the outer side of the rotating shaft, and the rotating plates are cylindrical; the fixed plate is arranged on the outer side of the rotating plate; the two first insertion holes are formed in the rotating plate; and the two second insertion holes are formed in the rotating shaft. By arranging the fixing part and adopting a mechanism capable of being rapidly disassembled and reset, the paper guide rope can be replaced more rapidly, the downtime is shortened, the complexity of maintenance operation is reduced, meanwhile, due to the concave-convex texture design on the surface of the rope wheel body, the friction force between the paper guide rope and the rope wheel is increased, and the service life of the rope wheel is prolonged. The traction efficiency is improved, pressure can be dispersed, and local abrasion is reduced.

This application provides a data processing method in a distributed system. The method includes: A management node splits a to-be-processed data processing request into a map task and a reduce task. A first worker node executes the map task, and writes intermediate data obtained by executing the map task into a shared storage area. The intermediate data is divided into a plurality of partitions based on a quantity of second worker nodes. Each partition belongs to one second worker node. An aggregation node stores, in a centralized manner, intermediate data that belongs to a same partition in the shared storage area. The second worker node obtains intermediate data of a corresponding partition to execute the reduce task. In this way, efficiency of pulling the intermediate data is improved, a transmission size is increased, a quantity of transmission times is reduced, and network performance is fully utilized.

This application relates to a slipform device for slope pouring, comprising a winch and a slipform. The winch is connected to the slipform via a steel wire rope and drives the slipform to move along the slope. The slipform includes a slipform body, on which two sets of auger assemblies are symmetrically arranged on one side facing upwards on the slope. The two sets of auger assemblies are used to transport concrete to both sides of the slipform body. At least one leveling mechanism is provided inside the slipform body. The leveling mechanism includes a first support arranged along the length of the slipform body. Both sides of the first support are connected to the slipform body via several sets of translational components. A movable seat that reciprocates along the length of the first support is provided in the middle of the first support. A second support perpendicular to the first support is connected to the bottom of the movable seat. A leveling device is provided in the middle of the second support, and the leveling device freely reciprocates along the length of the second support. A vibrating plate and a smoothing roller are provided on the bottom surface of the leveling device. This application improves the working efficiency and pouring quality of slope pouring.

This utility model relates to the field of wood grain paper processing and discloses a tear-resistant wood grain paper traction machine, including a base. A support frame is fixedly connected to the middle of the base. A contact element is slidably connected to the inner wall of the support frame. A pressure sensor is fixedly connected to the upper part of the contact element. An electric telescopic rod is fixedly connected through the upper part of the support frame. The output shaft of the electric telescopic rod is fixedly connected to the upper part of the pressure sensor. A fixing component is provided on the left side of the base, and a support component is provided behind the fixing component. The fixing component includes a support cylinder rotatably connected to the upper part of the base. In this utility model, through the cooperative use of the support component and the fixing component, when changing the wood grain paper take-up drum, rotating the threaded rod drives the moving component to move, causing the support component to release its restriction on the take-up drum. At the same time, rotating the limiting component releases its restriction on the support rod, achieving rapid replacement and improving traction efficiency.

The utility model discloses an automobile fault emergency traction device, which relates to the technical field of automobile fault emergency traction and comprises a traction plate, a fixing sleeve is mounted in the traction plate, one side of the fixing sleeve is connected with a first rotating shaft, a first shaft block is arranged outside the first rotating shaft, and a first rotating handle is mounted at the other end of the first rotating shaft. The other side of the fixing sleeve is connected with a second rotating shaft, a second shaft block is arranged outside the second rotating shaft, and a second rotating handle is installed at the other end of the second rotating shaft. According to the traction device, the traction plate, the first rotating shaft, the second rotating shaft, the first traction rope, the second traction rope, the first traction hook and the second traction hook are arranged, the two sets of traction hooks are arranged on the front face and the back face of the traction plate, installation and connection of the traction device, a fault vehicle and a tractor can be completed, bolts and nuts are not needed, and the installation and disassembly mode is convenient. Time and labor are saved, the traction efficiency is improved, and high practicability is achieved.

The present invention discloses a combined tension-compression traction device for parallel steel wire inclined cables and a construction method thereof. By providing a traction device, a steering system and a back-pressure system and performing combined construction, the problem of limited traction space for inclined cables at the anchor plate anchoring structure at the beam end is overcome, and at the same time, long-distance and large-tonnage continuous traction of ultra-long and ultra-heavy parallel steel wire inclined cables is realized, filling the gap in this technology. The combined tension-compression traction device for parallel steel wire inclined cables and the construction method thereof of the present invention have less force conversion during the construction process, low safety risk, and significantly improved traction efficiency. The device can adapt to the traction of inclined cables at different angles, ensure traction alignment accuracy, and improve construction quality.

The invention relates to the technical field of cable operation equipment, and particularly discloses a split type hydraulic tractor which comprises a bearing vehicle, a traction base is fixedly installed on the upper side of the bearing vehicle, a supporting frame is rotationally connected to the outer side of the traction base, a traction frame is rotationally connected to the outer end of the supporting frame, and a plurality of wire clamping traction mechanisms are arranged in the traction frame. The angle and horizontal height of the traction frame can be adjusted through the two sets of hydraulic cylinders arranged front and back, the equipment adaptation flexibility is expanded, a graded propelling structure of the wire clamping traction mechanism ensures stable propelling of a cable, sliding and damage are reduced through a front-back clamping structure, friction resistance is reduced, and the service life of the cable is prolonged. The problem that traction force is decreased progressively due to increase of the length of the cable is solved, traction efficiency is improved, energy consumption is reduced, the cable clamping traction mechanism supports convenient assembly, disassembly and maintenance, the equipment adapts to cables of different specifications due to the design of a sliding groove and a clamping groove, the universality of the equipment is improved, and the operation efficiency of the equipment for cable laying is also improved.

The invention discloses a cable traction device for power construction, which comprises a cable coil and further comprises a traction device main body, and the traction device main body comprises a traction frame fixedly arranged on the ground, a traction unit arranged on the traction frame and limiting units arranged on the two sides of the traction unit, by arranging the limiting mechanism and the adjusting mechanism on the traction frame, the cable main body can be prevented from sliding off during traction operation, linear traction of the cable main body during traction can be effectively guaranteed, the traction efficiency is improved, the traction operation can be suitable for cables of different thickness specifications, and the traction efficiency is improved. Therefore, the applicability of the traction device is improved.

The utility model discloses an aircraft traction device, including one end is provided with the traction rod of U-shaped traction head, two fixed structures that set up respectively on the two clamping plates of U-shaped traction head and the pull structure that sets up on the traction rod and is connected with two fixed structures. The fixed structure includes the fixed casing that sets up on the clamping plate and has the opening, rotatable setting on the pivot of clamping plate, set up on the pivot and be used for opening or closing the back baffle of opening, and the counterweight plate that sets up on the pivot, the counterweight plate is through its own gravity drive back baffle overturns to the closed position to close the opening, the pull structure is connected with back baffle, is used for driving back baffle overturns to the open position to open the opening. The utility model discloses can quickly with the plane wheel axle butt joint or dismount, improves the traction efficiency.

The utility model discloses a traction mechanism for a transfer printing film, which comprises a support frame, two driven feeding rollers attached to each other are arranged on the support frame, a bottom plate is arranged at the lower end of the support frame, a mounting groove is arranged on the bottom plate, a rotating screw rod is arranged in the mounting groove, a sliding block is connected onto the screw rod in a screwing manner, and the sliding block is arranged on the support frame. The power input end of the screw extends out of the mounting groove and is connected with the power output end of a motor, the motor is fixedly connected with the bottom plate, the top end of the sliding block is connected with a second support, the top end of the second support is provided with a conveying belt B. A rubber auxiliary roller moves downwards, so that a conductive rod A makes contact with a metal conductive block on an alarm bell, and the alarm bell is powered on. And a worker is notified to adjust the tension, so that large loss is prevented, the practicability of the equipment is improved, and the use requirement can be met.

The invention is suitable for the technical field of pipe production, and provides a plastic pipe manufacturing traction device which comprises a device base, a driving box, a driving mechanism, a regulation and control mechanism, two mounting plates, a U-shaped frame, an assembling mechanism and an elastic mechanism. The assembling mechanism comprises an assembling base, a vertical limiting assembly, a transverse limiting assembly, a connecting belt and an assembling groove. According to the traction device for plastic pipe manufacturing, the assembling mechanism can achieve rapid separation and connection of the single traction block and the driving mechanism, the connection stability between the traction block and the U-shaped frame is ensured, the traction block smoothly and circularly rotates along with the driving mechanism, and stable traction of a plastic pipe is completed; and the elastic mechanism can release the overall structure of the assembly seat and the connecting belt through the mounting plate, so that all the traction blocks can be quickly and uniformly replaced, and the daily maintenance operation of the device is greatly facilitated.

The utility model provides a crawling structure and a robot, the crawling structure comprises a first crawling assembly and a second crawling assembly, the first crawling assembly and the second crawling assembly are installed on two opposite sides of a robot main body, and the first crawling assembly and the second crawling assembly are arranged in parallel along the width direction of the robot main body; the driving advancing directions of the first crawling assembly and the second crawling assembly are the same. According to the robot, the driving advancing directions of the first crawling assembly and the second crawling assembly are the same, traction force can be concentrated, the climbing ability and traction efficiency of the robot on various terrains are improved, and the robot body is pulled to move in the target direction; when the first crawling assembly and the second crawling assembly are symmetrically arranged on the two opposite sides of the robot body, the robot body can keep better stability in the advancing process, the pressure exerted by the robot on the uneven ground can be dispersed, and the rolling risk caused by the uneven terrain is reduced.

The invention discloses a new energy highway-railway dual-purpose car puller, which relates to the technical field of car pulling equipment, and comprises a car pulling equipment body and a driving wheel assembly, an eight-in-one controller, a new energy battery, a high-voltage direct-current variable-frequency driving motor, a gearbox and two gearbox driving shafts are arranged on the traction equipment body, the input end of the eight-in-one controller is electrically connected with the output end of the new energy battery, and the input end of the eight-in-one controller is electrically connected with the input end of the high-voltage direct-current variable-frequency driving motor; the gearbox is connected with the high-voltage direct-current variable-frequency driving motor, the rear driving wheel assembly is installed at the rear end of the lower side of the vehicle pulling equipment body, the two corresponding height adjusting assemblies are installed on the front side and the rear side of the vehicle pulling equipment body, and the guiding assemblies are installed on the lower sides of the height adjusting assemblies. And the height adjusting assembly is matched with the guide assembly, so that steering can be performed very conveniently, and meanwhile, separation from a rail is avoided.

The utility model discloses a cast aluminum part rapid forming traction device which comprises a box body, a first gear and a second gear are symmetrically arranged in the box body, a toothed belt is arranged on the outer side of the first gear and the outer side of the second gear in a meshed mode, a plurality of traction seats are evenly and fixedly connected to one side of the toothed belt, and traction plates are arranged on one sides of the traction seats. And the inner side of the traction plate is slidably connected with an extension plate. By means of the structure, the first gear and the second gear are arranged on one side, the toothed belt is arranged on the outer side of the first gear and the outer side of the second gear in a mutually meshed mode, and the multiple traction bases are fixedly connected to one side of the toothed belt, so that traction can be rapidly and repeatedly conducted; and one side of the traction plate is symmetrically and fixedly connected with two limiting plates, the inner side of the traction plate is symmetrically and fixedly connected with two electric push rods, and the inner wall of the extension plate is fixedly connected with anti-skid lines, so that the aluminum parts are not prone to sliding out during traction, and the aluminum parts with various thicknesses can be pulled.

The invention discloses a method for eliminating the longitudinal edge effect of a direct current traction system, which is suitable for eliminating the longitudinal edge effect of the direct current traction system in rail transit, the longitudinal edge effect comprises a first type of longitudinal edge effect, and the first type of longitudinal edge effect is the formation of longitudinal pulsating flux density; the elimination method comprises the step of increasing the magnetic conductance equivalent spacing of the direct-current traction system so as to reduce the longitudinal pulsating flux density. The traction efficiency is improved by eliminating the longitudinal edge effect of the direct-current traction system in the rail transit.

The utility model discloses an anti-shake stable traction machine for a power cable, which belongs to the technical field of traction machines and comprises a fixing seat, a fixing frame fixedly connected to the middle of the top surface of the fixing seat, a threaded rod in threaded connection with the top of the fixing frame, a connecting block rotatably connected to the bottom end of the threaded rod, and first transmission rods fixedly connected to two sides of the bottom surface of the connecting block. One end, far away from the connecting block, of one group of transmission rods I is rotationally connected with a transmission rod II, one end of the transmission rod II is fixedly connected with a transmission rod III, and the other end of the transmission rod II is fixedly connected with a transmission rod IV. A pair of extrusion blocks of a transmission rod are driven to extrude a fixing plate, the bottom end of a sliding rod abuts against a cable in a fixing groove, the cable is prevented from falling off from the fixing groove, the cable is effectively pulled through cooperation with a separation roller and a limiting ring, the cable is prevented from shaking or winding in the pulling process, and the cable pulling efficiency is improved.

The invention relates to a cable threading traction device for building electrical engineering. The cable threading traction device comprises a supporting frame, a cylindrical cam, a cam rocker arm, a driven part, a wiring mechanism, a cable arranging mechanism and a driving device. The driving device comprises a driving motor and a transmission shaft; a horizontally-arranged transmission shaft penetrates through the supporting frame and is connected with a cylindrical cam arranged in the supporting frame. The cam rocker arm is installed in the supporting frame through a first rotating shaft. The upper portion of the cam rocker arm is connected with a surface groove of the cylindrical cam through a driven piece, and the lower portion of the cam rocker arm is connected with a wiring mechanism arranged on the second rotating shaft in a sleeving mode through a pull rod joint assembly. The wire inlet end of the second rotating shaft is further sleeved with a wire arranging mechanism. According to the invention, the driving motor is used for power, a traction cable is arranged in a line groove of a pipeline, the wiring mechanism is controlled to carry out wiring based on the cylindrical cam, the wire arranging mechanism is controlled to swing back and forth to lead wires, efficient and stable traction wiring work is carried out, the traction efficiency and the wiring precision are high, and the wiring quality is good.

The utility model provides an all-terrain unmanned vehicle clutch device, which comprises a device body, the device body comprises an output shaft, a half shaft flange, a clutch flange, a spline shaft and a spline sleeve, one end of the clutch flange is provided with a mounting sleeve seat, the spline sleeve and a clutch mechanism are arranged in the mounting sleeve seat, and the clutch mechanism comprises a rotating sleeve, a locking sleeve and a linkage assembly. The locking sleeve is slidably arranged in the mounting sleeve seat, a tooth groove is formed in the inner wall of the locking sleeve, and a tooth block is arranged on the outer wall of the spline sleeve; a rotary sleeve is arranged on the inner side of the locking sleeve, the rotary sleeve and the locking sleeve are connected through a linkage assembly, a threaded groove is formed in the outer wall of the rotary sleeve, the rotary sleeve is rotated through the rotary knob base, so that the threaded groove is in threaded fit with the linkage assembly, the locking sleeve is driven to transversely move in the mounting sleeve base, and meshing and separation of a tooth groove of the locking sleeve and a tooth block of the spline sleeve are achieved. Therefore, linkage and separation of the output shaft and the hub are achieved, the traction efficiency of the robot is improved, and the all-terrain vehicle can reach a high speed when being dragged.

This invention discloses a trenchless removal device and method for abandoned pipelines. A vibrating device and a grouting pipe are installed on an electric trolley. Before removal, the trolley vibrates the abandoned pipeline back and forth to reduce the density of the surrounding soil, facilitating removal. Before grouting, an air bladder is inflated so that it abuts against the inner wall of the abandoned pipeline, sealing the gap between the grouting pipe and the abandoned pipeline to prevent concrete from flowing back into the abandoned pipeline during grouting. Grouting is performed simultaneously with pipeline removal, promptly filling the voids left after removal. The concrete solidifies rapidly after flowing out of the grouting pipe, minimizing ground settlement. This construction method efficiently removes underground pipelines, completing the removal and grouting processes in one operation, offering advantages such as high safety and efficiency.

The utility model discloses a special fiber fabric parallel traction device which comprises a device table body, an annular guide rail, a first traction arm and a second traction arm, the annular guide rail is fixed at the top end of the device table body, and a first gear and a second gear are installed at the two ends of the inner side of the annular guide rail respectively. The first gear and the second gear are connected through a chain, the first traction arm and the second traction arm are arranged on the two sides of the annular guide rail correspondingly, and a first clamping plate and a second clamping plate are arranged in the first traction arm and the second traction arm correspondingly; the bottom ends and the top ends of the first traction arm and the second traction arm are provided with a first telescopic driving piece and a second telescopic driving piece correspondingly. According to the utility model, not only is a parallel traction mode adopted, the fabric cannot be damaged, but also the first traction arm and the second traction arm alternately complete parallel traction actions, so that a continuous traction function can be realized, and the traction efficiency is improved.

This invention discloses a method for assisting ships in passing through navigation tunnels. It includes the following steps: Step 1: retracting the wheeled drive mechanism; Step 2: moving the towing platform to the waiting ship; Step 3: extending the wheeled drive mechanism; Step 4: the bow of the ship entering the concave structure of the towing platform; Step 5: connecting the towing platform to the bow mooring bollard or hull of the ship; Step 6: activating the wheeled drive mechanism to tow the towing platform and ship; Step 7: moving the towing platform to the exit of the navigation tunnel and disconnecting the towing platform from the bow of the ship; Step 8: the towing platform exiting the channel and waiting for oncoming ships in the double-lane navigation tunnel; Step 9: the oncoming ship passes through by its own propulsion; Step 10: the towing platform connecting with the oncoming ship and towing it through the tunnel; Step 11: the towing platform returning to the starting point of the navigation tunnel. This invention has the advantage of enabling ships to pass through long-distance navigation tunnels under conditions of large water level fluctuations.