CN212448000U

CN212448000U - Ship cleaning robot

Info

Publication number: CN212448000U
Application number: CN202021081807.XU
Authority: CN
Inventors: 郑中强; 李思虎; 梁展搏; 田继伟; 王成印; 梁瀚朋; 常宗瑜
Original assignee: Ocean University of China
Current assignee: Ocean University of China
Priority date: 2020-06-12
Filing date: 2020-06-12
Publication date: 2021-02-02
Anticipated expiration: 2030-06-12

Abstract

The utility model provides a boats and ships cleaning robot, including belt cleaning device, drive arrangement and controller, its characteristics are: there are 3 rotary cleaning discs which are distributed in regular triangle and installed on the chassis, and the rotary cleaning discs are provided with cavitation jet nozzles. The sealed cabin is fixed on the chassis, and two horizontal pushers are fixed on the upper plane of chassis, and are located the both sides of sealed cabin, and 3 vertical pushers are regular triangle and distribute to fix on the chassis, and wash a set staggered arrangement with 3 rotations. The floating body is in a regular triangle shape, the floating body is connected with the chassis 2, and the through holes on three corners of the floating body are respectively aligned with the 3 vertical pushers. The module is convenient to arrange, the adsorption mode and the propulsion mode are improved, the advancing resistance is reduced, the obstacle crossing capability is improved, the surface of the ship is subjected to flaw detection, the non-repeated full-coverage operation of a working area is realized, and the cleaning efficiency is improved.

Description

Ship cleaning robot

Technical Field

The utility model belongs to the technical field of wash mechanical equipment, a washing automatic equipment for boats and ships is related to, a boats and ships cleaning robot specifically says so.

Background

The ship is a main tool for marine transportation, and due to the strong corrosivity of seawater and the strong adhesion of marine organisms, shellfish, seaweed, rusty scales, rusty spots and the like which are difficult to remove are adhered to the surface of a ship body, so that the speed of the ship is reduced by 10-50%, more fuel oil is consumed by the ship, and the transportation cost is greatly increased. In order to prolong the service life of the ship, reduce oil consumption and ensure the safe operation of the ship, the ship must be periodically docked for cleaning the surface of the ship body.

At present, the ship cleaning at home and abroad usually comprises the following methods:

and (3) painting toxic paint with slow volatility on the surface of the ship body to prevent plankton from attaching so as to achieve the effect of reducing the fuel consumption. But the strong toxicity of the paint also causes damage to other organisms along the route to different degrees, and destroys the local marine ecological environment. Therefore, the use of various toxic paints has been strictly prohibited internationally.

In addition, a protective film is adhered to the surface of the ship body, and the protective film is lifted within a certain time to achieve the purpose of removing plankton. The method needs frequent operation, has large workload and high cost, and is gradually eliminated by the market.

In China, the surface of the hull is mainly cleaned by manual sand blasting at present, the cleaning effect is obvious, but the labor intensity of workers is high, the efficiency is low, and the pollution to the human body and the environment is quite large.

The high-pressure water jet ship cleaning technology is a new technology developed in the last 30 years, mainly uses water jet, utilizes a high-pressure pump to pump high-pressure water, and the high-pressure water is conveyed to a nozzle through a pipeline, the nozzle converts the high-pressure low-flow-rate water into low-pressure high-flow-rate high-energy-density water jet, and the low-pressure high-flow-rate high-energy-density water jet impacts the surface to be cleaned positively or tangentially, so that the fouling substances on the surface of a ship body are peeled off. The technology has low energy consumption and light pollution, and improves the working environment and the labor intensity of workers.

The cavitation jet technology is a more advanced water jet ship cleaning technology, combines a cavitation mechanism with the water jet technology, artificially increases the number of cavitation bubbles in the water jet, and enhances the jet operation effect by utilizing the strong impact force generated by the rupture of a large number of cavitation bubbles. Compared with non-cavitation jet, the operation efficiency and effect of the cavitation jet far exceed those of the non-cavitation jet under the condition of the same pump pressure and flow velocity, so that the cavitation jet technology is applied to the fields of cleaning, rust removal, cutting and the like, and has the advantages of high efficiency, environmental protection, energy conservation, safety, reliability and the like.

In the past, above-mentioned various boats and ships cleaning work was accomplished by manual work, and along with the development of artificial intelligence technique, the boats and ships cleaning robot who adopts cavitation jet technology takes place in recent years the utility model discloses make before, boats and ships cleaning robot mainly is square structure, and the adsorption mode uses thrust to adsorb to be the main, and the propulsion mode is more single, and consequently, resistance of advancing is big, hinders more relatively poor, the repetitive operation of ability and omits the operation more. For example, Chinese patent (application number: 201810445027. X) discloses an underwater cleaning robot system facing marine attachments, which comprises an overwater power control bearing platform and an underwater robot, wherein a control valve group and a driving mechanism are installed on the underwater robot, a cavitation water jet nozzle is arranged at the bottom of the underwater robot, the overwater power control bearing platform is respectively connected with the control valve group, the driving mechanism and the cavitation water jet nozzle, and the water outlet end of the overwater power control bearing platform is connected with the water inlet end of the control valve group. The system is in a square structure, and two air bags are arranged on two side surfaces of the robot, so that the resistance in the walking process is further increased; adopt water jet propulsion ware on the adsorption mode, the propulsion mode is single to set up four crawl wheels, reduced the stability of robot walking.

SUMMERY OF THE UTILITY MODEL

The utility model provides a solve the above-mentioned problem that prior art exists, provide a boats and ships cleaning robot, the module of being convenient for is laid, improves the adsorption mode and propulsion mode, reduces the resistance that advances, improves the ability of crossing obstacles, detects a flaw to the boats and ships surface, realizes work area's no repeated all standing operation, improves the cleaning efficiency.

The utility model aims at realizing through the following technical scheme:

a ship cleaning robot comprises rotary cleaning discs, cavitation jet nozzles, a water supply pipeline of the cavitation jet nozzles, a chassis, a pusher, a sealed cabin, a floating body and a controller, wherein the controller is installed in the sealed cabin; the sealed cabin is fixed in the middle of the upper plane of the chassis, the pushers comprise two horizontal pushers and 3 vertical pushers, the two horizontal pushers are fixed on the upper plane of the chassis and positioned at two sides of the sealed cabin, and the 3 vertical pushers are distributed in a regular triangle shape and fixed on the chassis and staggered with the 3 rotary cleaning discs; the floating body is in a regular triangle shape, and through holes are formed in three corners of the floating body; the floating body is connected with the chassis, and the through holes on the three corners of the floating body are respectively aligned with the 3 vertical pushers.

The improvement of the technical scheme is as follows: the rotary cleaning disc comprises a cylindrical disc cover and an annular bottom plate, wherein the opening of the disc cover is downward, a flange arranged at the bottom of the disc cover is provided with a mounting hole, the disc cover is fixed on the annular surface of the bottom plate through the mounting hole on the flange by using a bolt, the center of the disc cover and the center of the bottom plate are arranged on the same straight line, and the top of the disc cover is fixed on the chassis; the bottom surface of the bottom plate is provided with universal wheels and permanent magnets, and the universal wheels and the permanent magnets are distributed in a staggered mode.

The technical scheme is further improved as follows: the water supply pipeline comprises a water distribution pipe and a water pipe joint which are arranged above the disc cover, and a water distribution connecting pipe and a three-way pipe joint which are arranged in the disc cover, wherein the interfaces at the two ends of the three-way pipe joint are respectively connected with one cavitation jet nozzle, the spraying direction of the nozzle of the cavitation jet nozzle is an acute angle with the surface of the bottom plate, and the nozzle directions of the two cavitation jet nozzles at the two ends of the three-way pipe joint are opposite; the upper interface of the three-way pipe joint is connected with the water pipe joint, 3 rotary connecting pieces are arranged on the chassis and distributed in a regular triangle, and the 3 rotary connecting pieces and the 3 vertical pushers are arranged in a staggered manner; a through hole is formed in the middle of the top surface of the disc cover, and the water pipe joint penetrates through the through hole in the disc cover to be rotatably connected with the lower end of the rotary connecting piece at the corresponding position; the distributive pipe comprises a main pipeline and 3 branch pipes, a pipeline channel is formed in the floating body, the main pipeline and the 3 branch pipes of the distributive pipe penetrate through the pipeline channel, and the 3 branch pipes are respectively connected with the upper ends of 3 rotary connecting pieces, so that the floating body and the chassis are connected into a whole.

The technical scheme is further improved as follows: still including the sensor subassembly, the sensor subassembly includes: the device comprises a temperature and humidity sensor, a photoelectric sensor and a controller, wherein the temperature and humidity sensor is used for detecting the sealing property of a sealed cabin and preventing a circuit board from being overheated, the attitude sensor is used for adjusting the attitude of a ship cleaning robot, the water depth sensor is used for judging the upper and lower water depth boundary, and the photoelectric sensor is used for judging the edge of a ship.

The technical scheme is further improved as follows: the 3 vertical pushers are respectively and vertically fixed on the chassis by support rods, and each support rod is provided with a searchlight; a camera is arranged above the floating body and covered by a hemispherical transparent sealing cover.

The technical scheme is further improved as follows: the chassis is provided with a plurality of round holes, and the top surface and the side wall of the disk cover are respectively provided with a plurality of through holes.

Compared with the prior art, the utility model the advantage be with positive effect:

1. the utility model combines the cavitation jet technology with the rotary cleaning disc, and forms a water jet ring in the rotary cleaning disc by using the reaction force of jet, thereby providing a low-pressure environment for the growth of cavitation bubbles and improving the cleaning efficiency;

2. the horizontal propeller and the vertical propeller in the utility model can effectively control the target distance, fully play the advantages of high efficiency and energy saving of cavitation jet cleaning technology, and enable the robot to realize steering, advancing, retreating, floating and sinking through the two propellers so as to realize the path traversal on the surface of the ship body, and the vertical propeller is also used for providing adsorption force;

3. the utility model breaks the design thought of the square appearance structure of the traditional ship cleaning robot, innovatively provides the structural design of double triangles, and the dislocation type double triangle layout of the vertical propeller and the cleaning disc enables the overall structure to tend to be flat, so that the module arrangement is convenient, the distance between the gravity center and the floating center is shortened, the advancing resistance is reduced, the posture adjustment of the robot is facilitated, and the non-repeated full-coverage operation of a working area is realized; meanwhile, the robot is also beneficial to the expansion of the functions of the robot, and if instruments can be added in the robot to detect the flaw of the surface of the ship.

4. The utility model discloses a thrust adsorbs the compound adsorption mode for giving first place to, magnetism adsorbs for assisting, when guaranteeing suction, has improved the ability of hindering more.

Drawings

Fig. 1 is an assembly and exploded schematic view of a ship cleaning robot of the present invention;

fig. 2 is an assembly and disassembly schematic view of another view angle of the ship cleaning robot of the present invention;

fig. 3 is a perspective view of the overall structure of the robot for cleaning ships of the present invention;

fig. 4 is an exploded view of the rotary cleaning disc of the robot for cleaning ships according to the present invention;

fig. 5 is a bottom view of the rotary cleaning disc of the robot for cleaning ships of the present invention;

fig. 6 is a flowchart of a cleaning control method of the ship cleaning robot of the present invention.

The numbering in the figure is: 1-rotary cleaning disk, 1.1-universal wheel, 1.10-through hole, 1.2-permanent magnet, 1.3-bottom plate, 1.4-cavitation jet double spray head, 1.5-water-dividing connecting pipe, 1.6-three-way pipe joint, 1.7-mounting hole, 1.8-disk cover, 1.9-water pipe joint, 2-chassis, 2.1-round hole, 3-rotary connecting piece, 4-horizontal pusher, 5-searchlight, 6-sealed cabin, 7-water-dividing pipe, 8-vertical pusher, 8.1-supporting rod, 9-floating body, 10-camera and 11-hemispherical sealed cover.

Detailed Description

The invention is described in further detail below with reference to the accompanying drawings:

referring to fig. 1-3, the present invention provides an embodiment of a robot for cleaning ships, comprising a rotary cleaning disc 1, a cavitation jet nozzle 1.4 and a water supply pipeline thereof, a chassis 2, a pusher, a sealed cabin 6, a floating body 9 and a controller, wherein the controller is installed in the sealed cabin 6. There are 3 rotation type washing dishes 1 and are regular triangle distribution to install on the lower plane of chassis 2, all be provided with cavitation jet shower nozzle 1.4 in every rotation type washing dish 1. The sealed cabin 6 is fixed in the middle of the upper plane of the chassis 2, the pusher comprises two

horizontal pushers

4 and 3 vertical pushers 8, the two horizontal pushers 4 are fixed on the upper plane of the chassis 2 and are positioned on two sides of the sealed cabin 6, and the 3 vertical pushers 8 are distributed in a regular triangle shape, are fixed on the chassis 2 and are staggered with the 3 rotary cleaning disks 1. The floating body 9 is in a regular triangle shape, three corners of the floating body 9 are respectively provided with a through hole 9.1, the floating body 9 is connected with the chassis 2, and the through holes 9.1 on the three corners of the floating body 9 are respectively aligned with the 3 vertical pushers 8. Thus, the vertical propeller 8 and the rotary cleaning disc 1 form a staggered double-triangle layout, which is beneficial to the flattening of the whole structure.

Referring to fig. 4 and 5, the rotary cleaning disc 1 includes a cylindrical disc cover 1.8 and a circular bottom plate 1.3, the opening of the disc cover 1.8 faces downward, a mounting hole 1.7 is formed in a flange arranged at the bottom of the disc cover 1.8, the disc cover 1.8 is fixed on the ring surface of the bottom plate 1.3 through the mounting hole 1.7 in the flange by using a bolt, the center of the disc cover 1.8 and the center of the bottom plate 1.3 are arranged on the same straight line, and the top of the disc cover 1.8 is fixed on the bottom plate 2. The bottom surface of the bottom plate 1.3 is provided with universal wheels 1.1 and permanent magnets 1.2, and the universal wheels 1.1 and the permanent magnets 1.2 are distributed in a staggered manner. Thus, the complete rotary cleaning disc 1 is assembled, the cavitation jet nozzle 1.4 is restrained by the disc cover 1.8 but is not fixed, the upper end of the cavitation jet nozzle can rotate along with the rotary connecting piece 3 on the chassis 2, and when water jets are ejected from the cavitation jet nozzles 1.4 in two opposite directions, a reaction force is generated, so that the cavitation jet nozzle 1.4 rotates to form a high-pressure water jet ring, a low-pressure environment is provided for the growth of cavitation bubbles, and the cleaning efficiency is improved.

Referring to fig. 1-3, the water supply pipeline comprises a water diversion pipe 7 and a water pipe connector 1.9 which are arranged above a disc cover 1.8, and a water diversion connecting pipe 1.5 and a tee pipe connector 1.6 which are arranged in the disc cover 1.8. The connectors at the two ends of the three-way pipe joint 1.6 are respectively connected with one cavitation jet nozzle 1.4 to form double nozzles, the spraying direction of the nozzles of the cavitation jet nozzles 1.4 and the surface of the bottom plate 1.3 form an acute angle, and the nozzle directions of the two cavitation jet nozzles 1.4 at the two ends of the three-way pipe joint 1.6 are opposite. The upper connector of the three-way pipe joint 1.6 is connected with the water pipe joint 1.9, 3 rotary connectors 3 are arranged on the chassis 2 and distributed in a regular triangle, and the 3 rotary connectors 3 and the 3 vertical pushers 8 are arranged in a staggered mode. A through hole is formed in the middle of the top surface of the disc cover 1.8, and 3 water pipe connectors 1.9 penetrate through the through hole in the disc cover 1.8 to be rotatably connected with the lower ends of 3 rotary connecting pieces in corresponding positions.

The shunt pipe 7 comprises a main pipeline and 3 branch pipes, a pipeline channel is formed in the floating body 9, the main pipeline and the 3 branch pipes of the shunt pipe 7 penetrate through the pipeline channel, and the 3 branch pipes are respectively connected with the upper ends of the 3 rotary connecting pieces 3, so that the floating body 9 and the chassis 2 are connected into a whole.

Further, the utility model discloses boats and ships cleaning machines people is still including sensor assembly, sensor assembly includes: the device comprises a temperature and humidity sensor, a photoelectric sensor and a controller, wherein the temperature and humidity sensor is used for detecting the sealing property of the sealed cabin and preventing the circuit board from overheating, the attitude sensor is used for adjusting the attitude of a ship cleaning robot, the water depth sensor is used for judging the upper and lower water depth boundary, and the photoelectric sensor is used for judging the ship edge, the temperature and humidity sensor, the attitude sensor and the water depth sensor are all arranged in the sealed cabin 6, the photoelectric sensor is arranged outside the sealed cabin 6, and various sensors in the sensor assembly are respectively connected with the controller.

In practical implementation, the temperature and humidity sensor adopts an H06I2C module, and has low drift and hysteresis and excellent long-term stability. The attitude sensor adopts an MPU6050 module which is provided with data processing and Kalman filtering algorithm and directly outputs deflection angles in three directions to the controller; wherein, through the numerical value of X axle, the controller can acquire the ascending gesture of boats and ships cleaning robot vertical direction to can guarantee to acquire that the gesture of boats and ships cleaning robot in the cleaning process is in the vertical state, can improve the efficiency of cleaning like this. The water depth sensor adopts an MS5837 module, the resolution ratio of the water depth sensor is up to 2cm, and the water depth sensor is used for judging the upper and lower water depth boundaries. The photoelectric sensor adopts an E18-D80NK module, is used for judging the edge of the ship, has the characteristics of small interference of visible light, simple signal and the like, judges the edge of the ship by detecting whether an object is shielded in the left and right directions, and prevents the ship cleaning robot from sliding off the ship.

Still further, the 3 vertical pushers 8 are vertically fixed on the chassis 2 by support rods 8.1, and a searchlight 5 is arranged on each support rod 8.1 to provide illumination for the camera 10. A camera 10 is disposed above the floating body 9, and the camera 10 is covered with a hemispherical transparent sealing cover 11. The camera 10 is used for shooting the surface image of the ship body, providing the image for an image recognition module of an upper computer, and is used for marking the types and the thicknesses of attachments and establishing an attachment recognition model so as to adjust the cleaning water pressure.

In addition, a plurality of round holes 2.1 are arranged on the chassis 2, and a plurality of through holes 1.10 are respectively arranged on the top surface and the side wall of the disk cover 1.8. The through holes 1.10 and the round holes 2.1 can reduce the resistance of the ship cleaning robot during steering, advancing, retreating, floating and sinking, and are beneficial to improving the cleaning efficiency.

Referring to fig. 1 to 5, the present invention provides an embodiment of a method for cleaning a ship cleaning robot, the method includes the following steps:

p1 Main program: the controller powers on the cavitation jet nozzles 1.4 in the 3 rotary cleaning discs and initializes each electrical appliance component to work; the combined adsorption of the vertical pusher 8 and the permanent magnet 1.2 ensures that the ship cleaning robot is adsorbed on the surface of the ship body, the ship cleaning robot advances along a set path while spraying water under the propulsion of the horizontal pusher 4, collects data of various sensors in the sensor assembly, and starts a corresponding interruption program when the data deviate from a normal value: p2, acquiring attitude data fed back by an attitude sensor by the controller, and starting an attitude correction interrupt program P21 when the ship cleaning robot deviates from the set advancing direction by 2 degrees;

p3, the controller collects the water depth data fed back by the water depth sensor, and when the water depth sensor detects that the ship cleaning robot is cleaned to the upper boundary or the lower boundary, a water depth boundary interrupt program P31 is started; and P4, the controller collects distance data fed back by the photoelectric sensor, and when the photoelectric detector detects that the ship cleaning robot moves to the left edge and the right edge, a ship edge interruption program P41 is started.

P5: when the controller detects that the motor has large output power and the ship cleaning robot does not move, the controller starts an obstacle crossing interruption program P51.

Further, the posture correction interruption program P21 comprises correcting the traveling direction of the ship cleaning robot, and returning to the main program to continue cleaning; the water depth boundary interruption program P31 comprises controlling the ship cleaning robot to stop cleaning, translating a machine position leftwards or rightwards, and returning to the main program to continue cleaning; the ship edge interruption program P41 comprises that the ship cleaning robot is controlled to stop advancing, whether the ship cleaning robot is positioned at an upper water depth boundary or a lower water depth boundary is judged, and the ship cleaning robot returns to a main program to continue cleaning after turning; the obstacle crossing interrupting program P51 includes controlling the ship cleaning robot to push the ship cleaning robot away from the surface of the ship body by the vertical propeller 8, adsorbing the ship cleaning robot onto the surface of the ship body after the ship cleaning robot advances for a certain distance, and returning to the main program to continue cleaning.

Still further, the cleaning method also comprises an image recognition function based on deep learning for selecting the cleaning path of the ship cleaning robot and cavitation jet parameters, and the specific steps comprise (1) judging the dirt attachment degree through a picture shot by the camera 10 by an upper computer, and selecting proper water pressure to reduce energy consumption; (2) when the multiple machines work, the upper computer judges whether the current path is a cleaned area through the camera 10, and the cooperation of the multiple machines is realized without adding complicated underwater communication equipment.

The embodiment of the cleaning method of the ship cleaning robot comprises the following steps of controlling the controller, the driving part and the cavitation jet nozzles 1.4 in the 3 rotary cleaning discs to be electrified and initializing the electric parts in the driving part to work; acquiring attitude data fed back by an attitude sensor, starting an interrupt program of attitude correction when the ship cleaning robot deviates from the set advancing direction by 2 degrees, correcting the advancing direction of the ship cleaning robot, and then returning to a main program to continue cleaning; collecting water depth data fed back by a water depth sensor, starting an interrupt program of water depth boundary detection when the water depth sensor detects that the ship cleaning robot cleans an upper boundary or a lower boundary, controlling the ship cleaning robot to stop cleaning, translating a machine position leftwards or rightwards, and continuing cleaning in the opposite direction; collecting distance data fed back by the photoelectric sensor, starting an interruption program of ship edge detection when the photoelectric detector detects that the robot moves to the left edge and the right edge, controlling the ship cleaning robot to stop advancing, judging whether the ship cleaning robot is positioned at an upper water depth boundary or a lower water depth boundary, and then turning and cleaning forwards; and collecting water depth data fed back by the water depth sensor, starting an obstacle crossing interruption program when the singlechip detects that the motor has larger output power and the robot has no displacement, controlling the ship cleaning robot to push the robot away from the surface of the ship body by using the vertical propeller 8, and adsorbing the robot onto the surface of the ship body after the robot moves forward for a certain distance.

Referring to fig. 6, in the embodiment of the image recognition process in the cleaning method of the ship cleaning robot of the present invention, the images collected by the camera 10 during the operation of the ship cleaning robot are firstly stored, then the types, thicknesses and cleaning water pressures of the attachments are artificially marked, and the images are input into the upper computer as training samples, the training samples are sample sets for learning, then an attachment recognition model is established and input into the upper computer, and at this time, the image recognition function of the upper computer is already established; when the ship cleaning robot works, whether a current passing area is cleaned or not and the types and the thicknesses of attachments can be judged through the image recognition function of the upper computer, if the current passing area is cleaned, the upper computer sends a forward stopping signal and a water pump closing signal, the forward stopping signal is input into the single chip microcomputer, so that the horizontal thruster 4 is controlled to stop, the water pump closing signal is input into the PLC, and the water pump electromagnetic valve is controlled to stop; and judging the types and thicknesses of the attachments, sending a signal for adjusting the water pressure, and inputting the signal into the PLC so as to control the adjustment of the electromagnetic valve of the water pump.

Of course, the above description is not intended to limit the present invention, and the present invention is not limited to the above examples, and those skilled in the art should also belong to the protection scope of the present invention in the scope of the present invention.

Claims

1. A ship cleaning robot comprises rotary cleaning discs, cavitation jet nozzles, a water supply pipeline of the cavitation jet nozzles, a chassis, a pusher, a sealed cabin, a floating body and a controller, wherein the controller is installed in the sealed cabin; the sealed cabin is fixed in the middle of the upper plane of the chassis, the pushers comprise two horizontal pushers and 3 vertical pushers, the two horizontal pushers are fixed on the upper plane of the chassis and positioned at two sides of the sealed cabin, and the 3 vertical pushers are distributed in a regular triangle shape and fixed on the chassis and staggered with the 3 rotary cleaning discs; the floating body is in a regular triangle shape, and through holes are formed in three corners of the floating body; the floating body is connected with the chassis, and the through holes on the three corners of the floating body are respectively aligned with the 3 vertical pushers.

2. The ship cleaning robot of claim 1, wherein the rotary cleaning disc comprises a cylindrical disc cover and an annular bottom plate, the opening of the disc cover faces downwards, a flange arranged at the bottom of the disc cover is provided with a mounting hole, the disc cover is fixed on the annular surface of the bottom plate through the mounting hole on the flange by bolts, the center of the disc cover and the center of the bottom plate are arranged on the same straight line, and the top of the disc cover is fixed on the chassis; the bottom surface of the bottom plate is provided with universal wheels and permanent magnets, and the universal wheels and the permanent magnets are distributed in a staggered mode.

3. The ship cleaning robot according to claim 2, wherein the water supply pipeline comprises a water diversion pipe and a water pipe joint which are arranged above the disc cover, and a water diversion connecting pipe and a three-way pipe joint which are arranged in the disc cover, the joints at two ends of the three-way pipe joint are respectively connected with one cavitation jet nozzle, the spraying direction of the nozzles of the cavitation jet nozzles forms an acute angle with the surface of the bottom plate, and the nozzles of the two cavitation jet nozzles at two ends of the three-way pipe joint face in opposite directions; the upper interface of the three-way pipe joint is connected with the water pipe joint, 3 rotary connecting pieces are arranged on the chassis and distributed in a regular triangle, and the 3 rotary connecting pieces and the 3 vertical pushers are arranged in a staggered manner; a through hole is formed in the middle of the top surface of the disc cover, and the water pipe joint penetrates through the through hole in the disc cover to be rotatably connected with the lower end of the rotary connecting piece at the corresponding position; the distributive pipe comprises a main pipeline and 3 branch pipes, a pipeline channel is formed in the floating body, the main pipeline and the 3 branch pipes of the distributive pipe penetrate through the pipeline channel, and the 3 branch pipes are respectively connected with the upper ends of 3 rotary connecting pieces, so that the floating body and the chassis are connected into a whole.

4. A marine vessel cleaning robot as claimed in claim 1 or 2, further comprising a sensor assembly, said sensor assembly comprising: the device comprises a temperature and humidity sensor, a photoelectric sensor and a controller, wherein the temperature and humidity sensor is used for detecting the sealing property of a sealed cabin and preventing a circuit board from being overheated, the attitude sensor is used for adjusting the attitude of a ship cleaning robot, the water depth sensor is used for judging the upper and lower water depth boundary, and the photoelectric sensor is used for judging the edge of a ship.

5. The marine vessel cleaning robot of claim 3, further comprising a sensor assembly, the sensor assembly comprising: the device comprises a temperature and humidity sensor, a photoelectric sensor and a controller, wherein the temperature and humidity sensor is used for detecting the sealing property of a sealed cabin and preventing a circuit board from being overheated, the attitude sensor is used for adjusting the attitude of a ship cleaning robot, the water depth sensor is used for judging the upper and lower water depth boundary, and the photoelectric sensor is used for judging the edge of a ship.

6. The ship washing robot as claimed in claim 1 or 2, wherein each of the 3 vertical pushers is vertically fixed to the chassis by a support rod, and a searchlight is provided on each support rod; a camera is arranged above the floating body and covered by a hemispherical transparent sealing cover.

7. The robot for washing ships according to claim 2, wherein a plurality of circular holes are formed in said bottom plate, and a plurality of through holes are formed in each of a top surface and a side wall of said cover.