1771 results about "Continuous rotation" patented technology

The utility model relates to the technical field of calendering rollers, and discloses a calendering roller with a self-cleaning structure, which comprises a main roller, a mounting plate penetrates through the end part of the main roller, the mounting plate is rotatably connected with the main roller, a cleaning component is arranged on the side wall of the mounting plate, and the cleaning component is arranged on the side wall of the mounting plate. The cleaning assembly comprises a driving gear, a mounting cylinder, a driven gear, a magnetic suction plate, a spring, a shifting rod, a cleaning roller and an arc-shaped plate. According to the calendering roller of the self-cleaning structure, the cleaning assembly is arranged and matched with continuous rotation of the cleaning roller, so that a shifting rod periodically extrudes and pushes an arc-shaped plate, and under cooperation of a magnetic suction plate and a spring, the cleaning roller does small-amplitude reciprocating motion in the horizontal direction while keeping rotating; the outer surface of the main roller is continuously cleaned, and it is avoided that impurities generated in the glass embossing operation process adhere to the arc-shaped outer wall of the main roller, and then the follow-up normal calendaring operation is affected.

The invention provides a flat heat dissipation axial magnetic flux motor which comprises a heat dissipation assembly, and the heat dissipation assembly comprises a rotor disc, a rotor shaft, an inner core, a first flow channel, a second flow channel, a piston, an oil storage box, cooling fins, fan blades, a flow guide pipe, a sealing plate, a mounting disc and a magnetic block. And the rotor shaft is fixedly connected to the interior of the rotor disc. The rotor shaft drives the mounting disc to rotate, cooling oil flows into the first flow channel on the right side, then sequentially flows through the right flow guide groove, the left flow guide groove, the first flow channel on the left side, the second flow channel and the flow guide pipe and finally circulates into the oil storage box, the cooling oil circulates along with continuous rotation of the rotor disc, and then heat dissipation of the rotor can be achieved; cooling oil flowing into the oil storage box from the flow guide pipe makes contact with the cooling fins, the cooling oil can be cooled through the cooling fins, efficient cooling of the rotor is achieved by adopting an internal circulation mode of the cooling oil, and installation and use of the motor are not affected.

The invention relates to the technical field of furnace shell welding, in particular to a gas industrial furnace shell welding device which integrates a radial circular seam and an axial longitudinal seam, a servo motor drives a planetary gear train through an intermittent sheave, a rotating shell drives a clamped furnace shell to rotate, and radial welding is completed; after a bottom clamping jaw instantly locks a shell, power is switched to a planet carrier, an outer mounting arm drives a driven scraping arm to grind the inner wall while axially moving, welding and grinding synchronization is achieved, a bidirectional pushing seat crank sliding block mechanism continuously rotates in a one-way mode to push and pull the furnace shell in a two-way mode, whole-circle accurate grinding is achieved during resetting, and six sets of air cylinder lead screw adjustable clamping jaws conduct internal and external synchronous supporting. The outer supporting cylinder is prevented from deformation, secondary clamping is not needed in the whole process, butt joint of multiple sections of furnace shells is completed at a time, continuous filling of a longitudinal weld bead can be completed when a circular seam is still in a high-temperature plastic stage through instantaneous switching of clamping and stopping, and the welding quality of a T-shaped connector area is improved.

A multi-mode sprinkler adjustable for part or full circle operation to irrigate a selected area is provided. The sprinkler includes a nozzle for dispensing fluid, a set of gears for rotating the nozzle and an arc setting mechanism that cooperates with the set of gears. The arc setting mechanism comprises a fixed trip for switching to a first direction for the nozzle and an adjustable trip movable relative to the fixed trip for setting an arc of rotation for the nozzle in the part circle mode. The arc setting mechanism also includes a toggle for engaging the fixed trip and the adjustable to switch between a first direction and a second direction when in the part circle mode. In the full circle mode, the adjustable trip overlaps at least in part the fixed trip, such that the fixed trip deflects the toggle radially inward, allowing continuous rotation of the nozzle.

Methods and apparatus for controlling a robot (e.g., having a set of continuous rotation joints) to perform extra human behaviors are provided. The method includes receiving task information to perform a task, determining, using a control system of the robot, a motion plan for the robot to perform the task, wherein the motion plan includes rotation about one or more joints of the robot (e.g., about at least one of the continuous rotation joints in the set of continuous rotation joints) to efficiently perform the task using extra human behaviors.

The invention discloses ventilation pipeline welding supporting equipment, relates to the technical field of ventilation pipeline welding, and aims at solving the technical problem that a traditional supporting device is insufficient in functionality. A center driving assembly, at least two outer edge supporting assemblies and an end supporting assembly are sequentially arranged on the main body rail frame from the input end to the output end. Welding assemblies are arranged on the outer sides of the two outer edge supporting assemblies; the welding end of the welding assembly is arranged in the gap between the two outer edge supporting assemblies in a penetrating mode. The driving type pushing mechanism has an intermittent pushing state and a continuous pushing state, and the driving type pushing mechanism is matched with the center driving disc frame to conduct continuous rotating work or intermittent rotating work, so that the ventilation pipeline welding supporting equipment conducts welding work on a circular pipeline of a spiral curling preparation technology; the welding work of the circular pipeline of the circular pipeline unit segmented welding preparation process is conducted; through cooperation of the dual-mode driving mechanism and the reconfigurable supporting system, the limitation of the single function of traditional equipment is broken through.

A universal drive including a ring gear, a sun gear in which a sun gear axis is moveable relative to a ring gear axis of the ring gear, a gear train constituted by a series of gears configured to connect the sun gear and the ring gear to each other, a link mechanism connected to the sun gear and the ring gear in the state in which relative rotation therebetween is allowed such that a power transmission state between the sun gear and the ring gear is continuously maintained while accommodating a change in the inter-axis distance between the sun gear and the ring gear, a carrier installed so as to support a rotating shaft of a final gear engaged with the ring gear, and a sliding member located between at least one of the gears and the carrier.

The utility model discloses a double-roller radial continuous rotating peristaltic pump. A driving mechanism, a rotating mechanism, a hose mechanism and a pipe pressing mechanism are arranged on a mounting bedplate; the hose mechanism comprises an elastic hose, a cam and a supporting plate, the supporting plate is connected with the bearing seat and the cam, the bearing seat is connected with the mounting table plate, and the elastic hose surrounds the periphery of the cam in the radial direction; the pipe pressing mechanism comprises rollers and a guide assembly, the guide assembly is connected with the rollers and the rotating mechanism, and the rollers are symmetrically arranged on the two sides of the elastic hose. The rotating mechanism is connected with the driving mechanism, the driving mechanism drives the rotating mechanism to rotate, the rotating mechanism drives the guide assembly to rotate, the idler wheel installed on the guide assembly circumferentially rotates in the radial direction and extrudes the elastic hose, and continuous metering and conveying of fluid are achieved. The peristaltic pump has the advantages of being compact in structure, high in reliability, low in abrasion loss of the inner wall of the hose and the like, and solves the problem that fluid is polluted due to the fact that the inner wall of the hose is seriously abraded and a large number of particles are generated in an existing peristaltic pump.

The utility model provides a cleaning module and cleaning equipment, and the cleaning module comprises a driving assembly which is configured to output driving force; the water pumping assembly is configured to supply water under driving of the driving assembly and comprises a water pumping structure, one end of the water pumping structure is connected with the driving assembly in a clamped mode, and the water pumping structure is configured to pump water in a preset period or without a period under driving of the driving assembly. The moving plate is provided with at least one moving plate water inlet hole and is configured to be capable of continuously rotating, and the moving plate water inlet hole has a first opening angle; the static piece is arranged on one side of the water outlet direction of the movable piece and at least provided with n static piece water outlet holes, n is a natural number larger than or equal to 2, and the n static piece water outlet holes are each provided with n second opening angles; wherein the movable piece continuously rotates relative to the static piece, and responds to overlapping of the projection of the movable piece water inlet hole and the projection of at least one static piece water outlet hole, and the water pumping assembly supplies water through the static piece water outlet holes with the overlapped projections.

The invention relates to the technical field of seamless steel pipe machining devices, in particular to high-precision seamless steel pipe automatic machining equipment which comprises a rack, a plurality of brackets used for supporting steel pipes are arranged in the rack, a plurality of lifting electric push rods are arranged at the bottom end of the inner side of the rack, and the telescopic ends of the lifting electric push rods are fixedly connected with the brackets; a sliding plate is slidably connected to the upper end of the rack, a lantern ring is arranged at the end, close to the rack, of the sliding plate, a cutting device used for cutting a steel pipe is arranged in the lantern ring, a movable frame is slidably connected to the inner end of the rack, and a polishing device used for polishing the outer surface of the steel pipe is arranged in the movable frame. And by combining continuous rotation of the steel pipe, high-precision and high-stability annular cutting is achieved, then the cutting precision and quality are improved, cutting lines are prevented from being broken, the automation degree of equipment is enhanced, the maintenance cost is reduced, the cutting requirements of steel pipes of different specifications are met, and meanwhile the working environment is improved.

The present application relates to the technical fields of animal feed preparation, and discloses a livestock feed preparation device, in order to solve the problem of clogging when the filter screen filters for a long time, the sieve cylinder is driven to rotate by the driving shaft, in this process, the relative movement between the driving wheel and the inside of the shell is utilized to force the driving wheel to move in the opposite direction between the driving sieve roller and the driven sieve roller by the transmission gear set. Since the filter part is located between the distance between the driving sieve roller and the driven sieve roller, the feed meeting the distance can be screened out, and the large stone or the granular particles are retained in the inside of the sieve cylinder. By the continuous rotation of the driving sieve roller and the driven sieve roller, the filter material clogged between the two is driven to have a tendency to move away from the filter part, thereby preventing the filter part from accumulating, and finally realizing the effect that the filter part is not easy to be clogged.

The invention discloses a diesel engine connecting bolt automatic tightening device, and relates to the technical field of bolt automatic tightening, the diesel engine connecting bolt automatic tightening device comprises a first linear module, the outer wall of a tightening sleeve is provided with a buffer correction piece, and the inner wall of the tightening sleeve is provided with a centering clamping piece located on the side, away from a bolt tightening head, of a slope connecting ring. By arranging the buffering correction piece, when one end of the bolt tightening head is not inserted into the cross notch of the bolt, the bolt tightening head can push the bolt to move by a certain distance at the moment, and then the bolt tightening head is rotated to the position aligned with the cross notch of the bolt through rotation of the bolt tightening head; therefore, the bolt tightening head is accurately inserted into the cross-shaped notch of the bolt, the arc-shaped baffle moves in the direction away from the circle center of the inclined plane connecting ring after moving by a certain distance along with continuous rotation and movement of the bolt tightening head, and therefore the bolt can be prevented from inclining in the process of being screwed into a threaded hole; and the accuracy of inserting the bolt into the threaded hole is improved.

The present invention relates to the field of metal processing, and in particular to a sleeve boring device for processing metal products. Due to the lack of targeted cleaning means, the existing metal sleeve boring device is difficult to quickly remove debris during processing, and it is easy to cause repeated friction in the processing area as the tool continues to rotate, which aggravates the wear of the boring tool and easily leads to uneven contact between the tool and the metal sleeve, and the roughness increases, which greatly damages the boring accuracy and smoothness, resulting in poor boring accuracy of the finished metal sleeve. A sleeve boring device for processing metal products includes a base, a control module and a support frame; one side of the base is fixedly connected to the control module, and the base is fixedly connected to the support frame. The boring tool is first limited by a clamping block, and the fixed frame then constrains the moving sleeve rod. The boring tool is limited by the moving sleeve rod for a second time. Under the double limit, the boring tool is stabilized, so that the inner side of the metal sleeve can be processed smoothly in the subsequent process.

The present invention relates to the technical field of trailing suction dredgers. Disclosed is a dredging apparatus for a trailing suction dredger. The dredging apparatus comprises a drag head suction shell and a top cover, wherein the top cover is fixedly connected to one side of the drag head suction shell, connecting wing plates are integrally provided on two sides of the top of the drag head suction shell, a sealing cover is fixedly connected to the top of the drag head suction shell, a driving mechanism is provided inside the sealing cover, transmission mechanisms are arranged on two sides of the drag head suction shell, and a rolling resisting mechanism is provided between the two transmission mechanisms; an anti-collision mechanism is provided at the bottom of the drag head suction shell; a scraping mechanism is provided inside the drag head suction shell; and a slag discharging mechanism is provided on an upper surface of the drag head suction shell. The dredging apparatus for a trailing suction dredger can clean up rocks intercepted on the surface through the cooperation of the continuous rotation of a blocking roller and a scraping mechanism, thereby avoiding the blockage of a second passage hole serving as a sludge suction inlet, and ensuring smoothness during sludge suction.

The utility model discloses a self-cleaning chemical filter device, which belongs to the technical field of filters and comprises a shell, a rotary filter component, a collecting cylinder and a deslagging component, and a liquid inlet pipe and a liquid outlet pipe are mounted on the side wall of the shell. The rotary filtering assembly comprises a mounting ring rotationally arranged in the shell and a plurality of filtering plates rotationally arranged on the mounting ring, and under fluid impact, the filtering plates close to the liquid inlet pipe can be opened to achieve liquid inlet, and the filtering plates close to the liquid outlet pipe can be closed to conduct filtering; the collecting barrel is mounted below the shell and is used for collecting filtered impurities; the slag discharging assembly is arranged at a slag outlet in the lower portion of the collecting cylinder and used for discharging impurities. According to the self-cleaning chemical filter device, through rotation of the mounting ring and deflection design of the filter plate, the dynamic filtering process is realized, and through continuous rotation of the mounting ring, the working state of the filter plate is continuously changed, so that the problem of blockage caused by long-time repeated filtering of a single filter plate is avoided.

The utility model relates to the technical field of fan assembling equipment, in particular to fan flexible assembling equipment which comprises a workbench, a rotating disc is installed in the center of the table top of the workbench, and a plurality of sets of positioning jigs used for placing fans are fixedly arranged on the circumferential face of the outer side of the disc face of the rotating disc in a surrounding mode. A plurality of fan assembling stations are further installed on the table top of the workbench and arranged on the outer side of the circumference of the rotating disc in a surrounding mode. According to the fan assembling machine, the rotating disc is arranged on the workbench and used for bearing and transferring all parts of a fan, the multiple fan assembling stations are arranged on the workbench around the rotating disc, and the fans can be assembled by multiple mechanisms at the same time through continuous rotation of the rotating disc; the rotating disc enables the parts to sequentially pass through the multiple fan assembling stations according to the preset program, automatic assembling from the parts to finished products can be achieved, the production efficiency is greatly improved, and the labor cost is reduced.

A motion simulator system is disclosed that includes a freely rotatable movable frame supported by, but unattached to, a hemispherical base. The movable frame comprises a spherical enclosure constructed from rigid, lightweight materials such as composite materials or interlocking panels, providing unlimited 360-degree rotation in all three rotational degrees of freedom (pitch, roll, and yaw). An internal actuator system coupled to the movable frame controls attitude positioning while the center of rotation remains substantially fixed relative to the base. Low friction engagement between the movable frame and base is achieved through transfer bearings integrated into the base's outer surface or by pressure-vented air cushions. The system enables smooth, continuous rotation of the untethered movable frame for enhanced motion simulation applications.

The invention discloses a demolding device convenient to convey and used for a metal casting mold and a using method of the demolding device, and belongs to the technical field of metal casting molds. Two mold bases are far away from each other, so that a gear can be meshed with teeth in the moving process, the gear drives a plurality of cams to rotate through a connecting shaft, and the protruding ends of the cams can extrude a blocking cover in the rotating process of the cams; when the protruding end of the cam is separated from the blocking cover, the connecting plate can be driven by the pulling force of the springs to get close to the die holder, the knocking strips can rapidly return and knock the die holder, the die holder vibrates, and along with continuous rotation of the cam, the connecting plate can drive the knocking strips to continuously knock the die holder. And in the process that the knocking strip knocks the mold base, generated vibration is transmitted to the whole mold cavity in the mold base, so that the casting in the mold cavity is stressed uniformly, the casting is not prone to deformation or abrasion, and the quality of a casting product is guaranteed.

The present invention relates to the technical field of conveying equipment, and in particular to a device for pushing automobile stamping parts in an automated workshop, which comprises a main shaft, a column and a guide groove plate group arranged on the outer wall of the main shaft, wherein the main shaft axis is horizontal, and the guide groove plate group consists of a first groove plate, a second groove plate and a third groove plate, and the grooves on the first groove plate, the second groove plate and the third groove plate are all located on their respective outer walls; by adopting the guide groove plate group to realize the automatic pushing of the stamping parts in the horizontal direction and the vertical direction, the loading and unloading methods of the stamping parts can be effectively simplified, the automated processing operation can be realized, manpower and time can be saved, the work efficiency can be improved, and the safety of the pushing work of the stamping parts is greatly improved. At the same time, since the guide groove plate group can rotate continuously and realize the pushing work of the stamping parts, the continuity of the pushing of the stamping parts can be improved, and the structure is simple and the cost is low.

The invention discloses a waste pathological slide crushing treatment device and a use method thereof, and belongs to the technical field of waste treatment, crushed materials are conveyed rightwards through an auger sheet and minced again, then slice tissues attached to the crushed materials are ground off, the crushed materials fall into a roller, the crushed materials can be conveyed rightwards in the rotating process of a spiral blade, and the crushed materials fall into the roller. Water is sprayed out from a plurality of spray holes outside the hollow shaft and washes the crushed aggregates, and the hollow shaft is matched to drive the spray holes to rotate, so that the purpose of washing the roller and the crushed aggregates in all directions is achieved, part of residual slice tissues in the crushed aggregates are scattered, and a mixture of sewage and the slice tissues flows into a collecting box through liquid leakage holes outside the roller; the residual slice tissue in the crushed material is effectively removed, the spiral blade drives the crushed material to leak out from the discharge hole along with the continuous rotation of the spiral blade driven by the roller, so that part of the slice tissue is prevented from remaining in the glass slide slag, biological information is not easy to leak, and the safety of crushing treatment of the waste pathological glass slide is improved.

The invention discloses multi-station shell automatic welding equipment which comprises a machine frame, a rotating disc, a driving device, a first feeding device, a first carrying device, a second feeding device, a second carrying device, a welding device, a detecting device, a discharging device and a third carrying device. A plurality of stations are sequentially arranged on the rack around the rotating disc, and a first feeding device, a second feeding device, a welding device, a detecting device and a discharging device are arranged on each station. The welding device is used for conducting closed seam welding on the butt joint position of the first shell and the second shell to form the assembly part, so that the assembly part has good sealing stability, automatic welding of the first shell and the second shell is achieved through continuous rotation of the rotary disc, the labor cost is saved, and the production efficiency is greatly improved.

An arrangement for limiting rotation, the arrangement including a base structure; a drive member rotatable relative to the base structure and having a drive feature; a stopping member having at least one driven feature, wherein the stopping member is arranged to be intermittently driven relative to the base structure between a plurality of discrete positions by a continuous rotation of the drive member and by cooperation between the drive feature and at least one driven feature, wherein the stopping member in a first end discrete position is arranged to limit rotation of the drive member in a first end position of a rotation range of the drive member; and a holding mechanism arranged to hold the stopping member in each discrete position, the holding mechanism being at least partly provided in the base structure.

A hat with a rotatable brim is disclosed, including a hat having a crown forming the top porting of the hat. The crown is configured to cover and fit a head of a user. A bearing system permits the rotatable connection between a brim and the crown. A rotating mechanism enables smooth and continuous rotation of the brim. A manual adjustment mechanism allows the user to manually rotate the brim.

The utility model relates to the technical field of solid gum forming dies, and provides a solid gum forming die convenient for gum scraping, which comprises a solid gum forming die body, and a plurality of circular grooves are arranged at the top of the solid gum forming die body. According to the utility model, firstly, the solid glue forming mold body is placed at a required position, then materials are uniformly poured into the plurality of circular grooves, and after the materials in the circular grooves are formed, a worker turns on an external power supply of the servo motor and starts the servo motor by utilizing the controller; the output end of the servo motor gradually drives the reciprocating threaded lead screw to rotate forwards, and the sliding block located on the surface of the reciprocating threaded lead screw circularly reciprocates through continuous rotation of the reciprocating threaded lead screw, so that glue scraping operation does not need to be carried out manually, the glue scraping device is very simple, time-saving and labor-saving, and automatic glue scraping treatment can be carried out on the glue scraping device; manual operation is facilitated, and the glue scraping efficiency of the solid glue forming mold is improved.

The invention discloses a non-Gaussian noise pollution spiral shaft rod type part measurement signal processing method, which can realize reliable purification of measurement signals, stable separation of bending deviation and spiral raceway morphology items and fitting reconstruction when pollution such as heavy tails, multiple peaks, burrs and sheet abnormal points exists. The method comprises the following steps: acquiring and synchronously registering measurement data of rotation and axial movement, establishing a joint fitting model for decomposing readings into deformation items and spiral raceway morphology items, and expressing the morphology items by multi-order harmonics, and a three-stage process is adopted to complete baseline establishment and coarse elimination, phase locking and fine filtering in sequence, and the harmonic order of the optimal spiral raceway morphology item is determined in a self-adaptive manner and finally reconstructed. The invention provides an effective solution for the problems that the continuous rotary scanning measurement signal of the spiral shaft rod type part is unstable in recovery and is easy to distort in reconstruction under the non-Gaussian noise pollution.

The invention discloses an alfalfa pod shell rapid smashing device, and relates to the technical field of smashing devices, the alfalfa pod shell rapid smashing device comprises a fixing plate, a rack, a lifting unit, a grinding bin, a grinding plate, a spiral through groove and an extrusion unit; the lifting plate is driven by the extrusion unit to ascend and descend; a motor; and the rotating pressing disc is located over the grinding plate, and the outer diameter of the rotating pressing disc is smaller than that of the grinding plate. According to the device disclosed by the invention, the spiral part of an alfalfa pod is clamped into the spiral through groove, so that the rotary pressure plate generates shearing force on the hull of the alfalfa pod, the hull of the alfalfa pod is split, seeds in the pod are separated from the hull, and meanwhile, the seeds are relatively small in size and fall onto the fixed plate from the spiral through groove; and then the lifting unit drives the grinding bin to move upwards, so that the extrusion force of the capsule shells of the fruit pods, which is applied by the rotary pressing disc, is increased, and along with the continuous rotation of the rotary pressing disc, the capsule shells of the fruit pods can be ground, so that the capsule shells are ground and crushed.

The invention is suitable for the field of cement production, and provides a raw coal drying device and method for cement production, the raw coal drying device comprises a raw coal conveying mechanism, a first ball mill and a second ball mill, a first grinding ball set and a second grinding ball set are arranged in the first ball mill and the second ball mill correspondingly, and grinding protrusions are arranged on the inner wall of the first ball mill; the inner wall of the second ball mill is a smooth wall surface; the raw coal conveying mechanism conveys raw coal to the first ball mill through the first feeding bin, the first ball mill conveys coarse pulverized coal to the second ball mill, and the second ball mill conveys fine pulverized coal obtained after ball milling to the conveying device so that the fine pulverized coal can be conveniently conveyed to the storage bin. Through the first ball mill and the second ball mill, water in raw coal can be evaporated in the raw coal crushing process in the continuous rotation process of the grinding ball set, so that raw coal crushing and drying are achieved, and the working efficiency can be greatly improved.

The invention relates to the technical field of laser welding equipment, in particular to a laser welding device for machining a metal standard part, which comprises a rack and a knocking assembly for reducing the welding stress of the metal standard part, the knocking assembly comprises two mounting frames mounted on the rack and a guide plate for guiding the metal standard part to slide off, and a heat dissipation assembly for cooling the metal standard part is mounted between the two mounting frames; according to the device, the knocking head and the knocking block which continuously rotate are used for knocking the metal standard part with residual heat after welding is completed to eliminate stress, the situation that the welding seam position of the metal standard part needs to be tempered and then knocked to eliminate stress in the later period is avoided, and the production efficiency is improved.

The invention belongs to the technical field of toy processing, and particularly relates to a rotating disc type toy assembling machine which comprises a machine table, a rotating disc is rotatably mounted on the upper side of the machine table, a driving motor used for driving the rotating disc to rotate is arranged in the machine table, a plurality of mounting grooves are formed in the rotating disc, and bearing tables are mounted in the mounting grooves; a plurality of vibration discharging discs are installed on the side wall of the machine table and connected with a discharging guide rail, and a feeding assembly is arranged between the discharging guide rail and the bearing table. By means of continuous rotation of the rotary disc, assembling of parts can be automatically completed in the rotating process, the assembling efficiency is greatly improved, manual assembling is not needed, the labor cost is reduced, and meanwhile the production efficiency is improved.

The invention relates to a fluid section scanning device and an application method, and belongs to the technical field of water flow detection. According to the technical scheme, a second magnet on a rotating disc is matched with a first magnet on a magnet support through magnetic coupling, the magnet support outside the front side wall of a waterproof shell and a sliding shaft sleeve are driven to rotate around a fixed shaft, and a sensor on the sliding shaft sleeve rotates along with the magnet support; the sensor comprises a sonar sensor which floats under the water surface, a stepping motor rotates in a forward and reverse alternating discontinuous mode within the range of larger than 180 degrees and smaller than 360 degrees, and the sensor conducts forward and reverse alternating rotating scanning in the range of larger than 180 degrees and smaller than 360 degrees within the water passing section. The device has the advantages that winding damage of a sensor cable is avoided, magnetic coupling is adopted to replace a conductive slip ring, only waterproof sealing needs to be carried out on the driving motor and the control module, the sensor does not need to be sealed, reliability is improved, and cost is reduced.