Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide rotary water surface oil stain recovery equipment which can realize efficient and continuous recovery of water surface floating oil, improve the floating oil collecting effect and reduce the occupied space of a mooring place.
In order to achieve the purpose, the invention provides rotary water surface oil stain recovery equipment, which comprises a ship body; a recovery system mounted on the hull; an oil absorption system, the oil absorption system comprising: the first support arm is connected to the ship body in a sliding mode along the width direction of the ship body, and one end of the first support arm extends out of the ship body; the second support arm is rotatably connected to one end, extending out of the ship body, of the first support arm; the lifting frame is vertically matched on the second support arm in a lifting manner; the roller body is rotatably arranged on the lifting frame, a plurality of liquid inlet channels are arranged on the roller body, the liquid inlet channels extend along the length direction of the roller body, and the plurality of liquid inlet channels are distributed on the outer wall of the roller body along the circumferential direction; the rotary driving mechanism is arranged on the lifting frame, connected with the roller body and used for driving the roller body to rotate; the liquid accumulation box is arranged on the lifting frame and is communicated with the recovery system, the liquid accumulation box is connected to one end of the roller body, and each liquid inlet channel is communicated with the liquid accumulation box; and the liquid scooping part is arranged on the outer wall of the roller body, and one liquid scooping part is arranged at the inlet of each liquid inlet channel.
Preferably, a plurality of the liquid inlet channels are arranged in an annular array along the central axis of the roller body, and each liquid inlet channel comprises: the liquid inlet is arranged on the outer wall of the roller body; a first drainage lumen; the roller body is provided with a liquid storage tank, the roller body is provided with a liquid inlet, the liquid storage tank is communicated with the liquid inlet, the roller body is provided with a liquid storage tank, the first drainage cavity and the second drainage cavity are arranged in the roller body, the first drainage cavity is communicated with the liquid inlet and the second drainage cavity respectively, and one end of the second drainage cavity runs through the end face of the roller body and is communicated with the liquid storage tank.
Preferably, the first drainage cavity gradually decreases from the inner space to the outer space along the radial direction of the roller body, and the second drainage cavity gradually increases towards the inner space close to the liquid collecting box along the axial direction of the roller body.
Preferably, the liquid scooping member includes: the baffle is arranged on the roller body and shields the liquid inlet, the baffle extends along the length direction of the liquid inlet, and an opening is formed between one end of the baffle and the roller body; the two side plates are arranged on two sides of the baffle plate and are attached to the outer contour of the roller body; a screen disposed over the opening.
Preferably, the crane comprises: the top plate is arranged above the second support arm, the first vertical arm is connected to one end of the top plate, and the first vertical arm vertically and movably penetrates through the second support arm; the second vertical arm is connected to the other end of the top plate and arranged in parallel with the first vertical arm, and the second vertical arm vertically and movably penetrates through the second support arm; the lifting motor is arranged on the second support arm; and the screw rod is vertically connected to an output shaft of the lifting motor, penetrates through the top plate and is in threaded fit with the top plate.
Preferably, the liquid accumulation box is fixed on the second vertical arm, a side plate of the liquid accumulation box, which is close to the roller body, is provided with a mounting hole, and one end of the roller body is connected in the mounting hole in a sealing and rotating manner; the other end of the roller body is provided with a rotating shaft which is rotatably connected to the first vertical arm; the rotary driving mechanism comprises a rotary motor, an upper synchronous wheel, a lower synchronous wheel and a synchronous belt; a first cavity is arranged in the first vertical arm, the rotating motor is arranged on the first vertical arm, and an output shaft of the rotating motor extends into the first cavity and is connected with the upper synchronizing wheel; the rotating shaft extends into the first cavity and is connected with the lower synchronizing wheel, and the synchronous belt is wound on the upper synchronizing wheel and the lower synchronizing wheel in sequence.
Preferably, the steering gear further comprises a first steering gear, a second steering gear and a steering motor; a U-shaped opening is formed in one end, close to the second support arm, of the first support arm, a first shaft lever is vertically fixed in the U-shaped opening, and the first steering gear is fixed on the first shaft lever; one end of the second support arm, which is close to the first support arm, is provided with two support plates which are arranged in parallel up and down, each support plate is respectively connected with the first shaft rod in a rotating way, and the first steering gear is positioned between the two support plates; a second shaft lever is rotatably connected between the two support plates along the vertical direction, and the second steering gear is fixed on the second shaft lever and is in meshing transmission with the first steering gear; the steering motor is arranged on the support plate, and an output shaft of the steering motor is connected with the second shaft rod.
Preferably, three sets of the oil absorption systems are arranged at intervals on the same side of the ship body along the length direction of the ship body, the three sets of the oil absorption systems form an oil absorption unit, and the two oil absorption units are symmetrically arranged on two sides of the ship body; still include flexible actuating mechanism, every the oil absorption unit is connected with one flexible actuating mechanism, flexible actuating mechanism includes: the cross section of the first support arm is rectangular, and the first support arm penetrates through the hull and then is in form-fitting sliding fit in the guide cylinders; the first screw is in threaded connection with the first support arm close to the bow; the second screw is in threaded connection with the first support arm positioned in the middle; the third screw is in threaded connection with the first support arm close to the stern; the threads of the first screw, the second screw and the third screw are single threads, and the thread pitches of the first screw, the second screw and the third screw are gradually increased in sequence; the first screw, the second screw and the third screw are respectively and rotatably connected with one bearing seat; the driving component is used for synchronously driving the first screw rod, the second screw rod and the third screw rod to rotate.
Preferably, the driving assembly comprises a telescopic driving motor, a transmission chain, a driving chain wheel and three driven chain wheels, the first screw rod, the second screw rod and the third screw rod are respectively and fixedly provided with one driven chain wheel in a penetrating manner, the telescopic driving motor is installed on the ship body, the driving chain wheel is connected to an output shaft of the telescopic driving motor, and the transmission chain is meshed with the driving chain wheel and the driven chain wheels in a winding manner.
Preferably, the recycling system comprises: a floating oil recovery tank provided on the hull; a suction pump, one end of which is communicated with the floating oil recovery tank; the oil suction hose is arranged on the first support arm and the second support arm, one end of the oil suction hose is communicated with the suction pump, the other end of the oil suction hose is provided with an oil suction head, and the oil suction head is arranged at the bottom of the liquid accumulating box.
The invention has the beneficial effects that:
1. the invention discloses a rotary water surface oil stain recovery device, which is characterized in that a plurality of liquid inlet channels are arranged on a roller body, the height of a lifting frame is adjusted before collection, the bottom of the roller body is slightly immersed into a water surface polluted by floating oil, a rotary driving mechanism is started to drive the roller body to continuously rotate, a liquid scooping piece firstly scoops up oil-water mixed liquid and introduces the oil-water mixed liquid into the liquid inlet channels, and each liquid inlet channel in the roller body is independent and does not interfere with each other, so that the oil-water mixed liquid can flow into a liquid accumulating box from the liquid inlet channels under the continuous rotation of the roller body and is collected by a recovery system. This rotation type surface of water greasy dirt recovery plant has stronger flexible, scoops up the oil slick through rotatory roller body and collects in succession, has realized having reduced intensity of labour to the high-efficient recovery that lasts of surface of water oil slick, and recovery effect is good, and is applicable in the oil slick recovery of sea, river and lake surface.
2. By designing the screw pitches of the first screw, the second screw and the third screw into a gradually increasing structure, when the driving assembly drives the first screw, the second screw and the third screw to synchronously rotate, the first screw with a smaller screw pitch can drive the first arm matched with the screw thread to move in a short distance along the guide cylinder, the second screw with a middle screw pitch can drive the first arm matched with the screw thread to move in a middle distance along the guide cylinder, and the third screw with a largest screw pitch can drive the first arm matched with the screw thread to move in a long distance along the guide cylinder, so that the length of the three first arms extending into the ship body is gradually increased, therefore, the three first arms along the direction from the bow to the stern are arranged in a stepped structure, when the second arm is rotated and folded to one side of the ship body, the three second arms on the same side cannot interfere with each other, and the occupied space of the recovery device in a berth is effectively reduced, the overall structure of the recovery equipment is optimized, and the shape of the recovery equipment is more concise and beautiful.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby.
It is to be noted that, unless otherwise specified, technical or scientific terms used herein shall have the ordinary meaning as understood by those skilled in the art to which the invention pertains.
In the description of the present application, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.
Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
As shown in fig. 1 to 5, in one embodiment of the present invention, there is provided a rotary water surface oil recovery apparatus, which includes a hull 1, and a recovery system 2 and an oil suction system provided on the hull 1.
The oil absorption system comprises a first support arm 31, a second support arm 32, a lifting frame 4, a roller body 5, a rotary driving mechanism 6, a liquid accumulating box 7 and a liquid scooping part 8. The first arm 31 is slidably attached to the hull 1 in the width direction of the hull 1, and has one end extending out of the hull 1 and rotatably attached to a second arm 32. The crane 4 cooperates on the second support arm 32 along vertical lift, and the roller body 5 rotates and installs on the crane 4, is provided with a plurality of inlet channel on the roller body 5, and inlet channel extends along the length direction of roller body 5, and a plurality of inlet channel distribute along circumference at the outer wall of roller body 5. The rotary driving mechanism 6 is arranged on the lifting frame 4, is connected with the roller body 5 and is used for driving the roller body 5 to rotate. The hydrops case 7 is installed on crane 4, and it communicates with recovery system 2, and hydrops case 7 is connected in the one end of cylinder 5, and every inlet channel communicates with hydrops case 7 respectively. The liquid scooping part 8 is arranged on the outer wall of the roller body 5, and the inlet of each liquid inlet channel is provided with one liquid scooping part 8.
The recovery system 2 includes a floating oil recovery tank, a plurality of suction pumps, and a plurality of oil suction hoses 21, wherein the floating oil recovery tank is provided on the hull 1, and one end of the suction pump communicates with the floating oil recovery tank. The oil suction hose 21 is installed on the first arm 31 and the second arm 32, one end of the hose is communicated with the suction pump, the other end of the hose is provided with the liquid suction head 22, and the liquid suction head 22 is installed at the bottom of the liquid collecting tank 7. The oil-water mixed liquid in the liquid accumulation box 7 is sucked into the floating oil recovery box through the oil suction hose 21 under the action of the suction pump, and can be separated into water and oil through the water-oil separation device, and the separated water is discharged. Since the second arm 32 rotates around the first arm 31, the oil suction hose 21 can be bent or can be provided with a bent and telescopic hose at the same time, so as to adapt to the rotation of the second arm 32.
The rotation type surface of water greasy dirt recovery plant of this embodiment, it is through setting up a plurality of inlet channels on the cylinder 5, adjust the height of crane 4 before collecting, make 5 bottoms of cylinder soak in the surface of water that is polluted by the oil slick, open rotary driving mechanism 6, make it drive cylinder 5 and continuously rotate, it at first ladles out the oil-water mixture to ladle out liquid 8, and introduce it to the inlet channel in, every inlet channel in the cylinder 5 is independent and mutually noninterfere, therefore, under cylinder 5 continuously rotates, the oil-water mixture can follow inlet channel inflow hydrops case 7 in, rethread recovery system 2 collects. This rotation type surface of water greasy dirt recovery plant has stronger flexible, scoops up the oil slick through rotatory roller body 5 continuously and collects, has realized having reduced intensity of labour to the high-efficient recovery that lasts of surface of water oil slick, and recovery effect is good, and is applicable in the oil slick recovery of sea, river face and lake surface.
In one embodiment, the plurality of liquid inlet channels are arranged in an annular array along the central axis of the roller body 5, and each liquid inlet channel comprises a liquid inlet 51, a first drainage cavity 52 and a second drainage cavity 53, wherein the first drainage cavity 52 and the second drainage cavity 53 are both arranged in the roller body 5, and both extend along the length direction of the roller body 5 and are communicated with the liquid accumulation tank 7. The liquid inlet 51 is arranged on the outer wall of the roller body 5, and the liquid inlet 51 extends inwards along the radial direction of the roller body 5 and is communicated with the first drainage cavity 52. When the rotary driving mechanism 6 drives the roller body 5 to rotate, the oil-water mixed liquid is firstly scooped up by the liquid scooping part 8, and because the roller body 5 continuously rotates, the oil-water mixed liquid can flow into the liquid accumulating tank 7 from the liquid inlet 51 sequentially through the first drainage cavity 52 and the second drainage cavity 53, and the recovery system 2 sucks the mixed liquid in the liquid accumulating tank 7 to collect the mixed liquid. Because every inlet channel all is independent and mutually noninterference, consequently, the mixed liquid that enters into in the inlet channel all can only flow into hydrops case 7 in, and can not pour out at the cylinder 5 rotation in-process to the collection effect has been promoted.
In one embodiment, the first drainage chamber 52 is gradually reduced in inner space from the outside to the inside in the radial direction of the roller body 5, and the second drainage chamber 53 is gradually increased in inner space in the axial direction of the roller body 5 toward the direction close to the liquid collecting tank 7. The design of this structure, the oil-water mixture that makes to scoop up liquid spare 8 and scoop up can be fast through first drainage chamber 52 and drainage to second drainage chamber 53 along in, simultaneously, because the cross-section space that second drainage chamber 53 followed increases gradually towards the direction of hydrops case 7, this structural design can improve the velocity of flow of mixed liquid, reduces the dwell time of mixed liquid in second drainage chamber 53 to also can reduce the mixed liquid gathering in second drainage chamber 53, thereby make it flow into in hydrops case 7 fast.
In one embodiment, the liquid scooping member 8 includes a baffle 81, a filter screen 82, and two side plates, wherein the baffle 81 is disposed on the roller body 5 and blocks the loading port 51, the baffle 81 extends along the length direction of the loading port 51, and an opening is formed between one end of the baffle 81 and the roller body 5. Two side plates are arranged at two sides of the baffle 81, the side plates are attached to the outer contour of the roller body 5, and the filter screen 82 is arranged on the opening. The scooping member 8 is similar to a dustpan, and the baffle 81 cooperates with the side plate to scoop the oil-water mixture into the inlet 51 from the opening during the rotation of the roller body 5. In order to avoid impurities such as garbage from entering and blocking the liquid inlet 51, the first drainage cavity 52 and the second drainage cavity 53 and affecting the collection effect, the opening is provided with a filter screen 82.
In one embodiment, the crane 4 comprises a top plate 41, a first vertical arm 42, a second vertical arm 43, a lifting motor 44 and a screw rod 45, wherein the top plate 41 is arranged above the second support arm 32, the first vertical arm 42 is connected to one end of the top plate 41, and the first vertical arm 42 vertically movably penetrates through the second support arm 32. The second vertical arm 43 is connected to the other end of the top plate 41 and arranged in parallel with the first vertical arm 42, and the second vertical arm 43 vertically movably penetrates through the second support arm 32. The lifting motor 44 is arranged on the second support arm 32, the screw rod 45 is vertically connected to an output shaft of the lifting motor 44, and the screw rod 45 penetrates through the top plate 41 and is in threaded fit with the top plate. Through the design on roof 41 with the screw-thread fit's of lead screw 45 nut 46, the lead screw 45 wears to establish in above-mentioned nut 46, and when starting elevator motor 44, because first vertical arm 42 and second vertical arm 43 are along vertical by the activity restriction on the second support arm 32, consequently, the lead screw 45 rotates and can drive nut 46 and roof 41 and move up or descend to reach the purpose to the whole height adjustment of crane 4.
In one embodiment, the liquid accumulating box 7 is fixed on the second vertical arm 43, a mounting hole is formed in a side plate, close to the roller body 5, of the liquid accumulating box 7, and one end of the roller body 5 is connected in the mounting hole in a sealing and rotating mode; the other end of the roller body 5 is provided with a rotating shaft 54, and the rotating shaft 54 is rotatably connected to the first vertical arm 42; the rotary driving mechanism 6 comprises a rotary motor 61, an upper synchronous wheel 62, a lower synchronous wheel 63 and a synchronous belt 64; a first chamber 421 is arranged in the first vertical arm 42, the rotating motor 61 is arranged on the first vertical arm 42, and an output shaft of the rotating motor extends into the first chamber 421 and is connected with the upper synchronizing wheel 62; the shaft 54 extends into the first chamber 421 and is connected to the lower timing wheel 63, and the timing belt 64 is sequentially wound around the upper timing wheel 62 and the lower timing wheel 63.
When starting rotating electrical machines 61, rotating electrical machines 61 drives synchronizing wheel 62 rotatory, because last synchronizing wheel 62 and lower synchronizing wheel 63 pass through hold-in range 64 and connect, consequently, lower synchronizing wheel 63 and pivot 54 also can follow the rotation of last synchronizing wheel 62, and hydrops case 7 is fixed on second vertical arm 43, and the roller body 5 is connected with hydrops case 7 seal rotation, consequently, starts rotating electrical machines 61 and can drive the roller body 5 and rotate. If design into following the roller body 5 pivoted structure with hydrops case 7, thereby the winding on hydrops case 7 can be followed its rotation to the oil absorption hose 21 (will be explained further below) on hydrops case 7, through fixing hydrops case 7 on second perpendicular arm 43, hydrops case 7 and roller body 5 design into sealed rotation and are connected, roller body 5's rotation can not drive hydrops case 7 and rotate, and simultaneously, every second drainage chamber 53 communicates with hydrops case 7's inner chamber all the time, the smoothness nature of having guaranteed the feed liquor and mutually noninterfere and spill, thus, when simplifying oil absorption system structural design, also can not influence the suction effect of the mixed liquid of recovery system 2 in to hydrops case 7. Of course, the shaft 54 and the first chamber 421 need to be designed to be connected in a sealed rotation manner, so as to prevent oil and water from entering the first chamber 421.
In one embodiment, the oil suction system further comprises a first steering gear 91, a second steering gear 92 and a steering motor 93; one end of the first support arm 31 close to the second support arm 32 is provided with a U-shaped opening 311, a first shaft 312 is vertically fixed in the U-shaped opening 311, and a first steering gear 91 is fixed on the first shaft 312; one end of the second support arm 32 close to the first support arm 31 is provided with two support plates 321 which are arranged in parallel up and down, each support plate 321 is respectively connected with the first shaft 312 in a rotating manner, and the first steering gear 91 is positioned between the two support plates 321; a second shaft lever 322 is vertically and rotatably connected between the two support plates 321, and the second steering gear 92 is fixed on the second shaft lever 322 and is in meshing transmission with the first steering gear 91; the steering motor 93 is mounted on a support 321, and its output shaft is connected to a second shaft rod 322.
Through designing first support arm 31 and second support arm 32 to rotate to be connected, after collecting the work, through opening steering motor 93, steering motor 93 drives second steering gear 92 and rotates, because first steering gear 91 is fixed on first axostylus axostyle 312, consequently, second steering gear 92 can rotate around first steering gear 91, and drive two extension boards 321 and rotate around first axostylus axostyle 312, thereby drive second support arm 32 and rotate around first axostylus axostyle 312 and rotate, so, can rotate second support arm 32 and fold up to one side of hull 1, effectively reduced this recovery plant oil absorption system's occupation space, make its appearance succinct pleasing to the eye more. Before use, the second arm 32 can be rotated to open by turning on the steering motor 93 according to the principle, so that the structure of the recycling equipment can be optimized.
The floating oil recovery ship belongs to an accident rescue ship, namely, the water surface floating oil recovery and cleaning work is carried out when an oil leakage accident occurs, and when the ship is in an idle state, the occupied space of the ship berthing place needs to be reduced as much as possible. In one embodiment, three sets of oil absorption systems are arranged at intervals on the same side of the ship body 1 along the length direction of the ship body 1, the three sets of oil absorption systems form an oil absorption unit, and the two oil absorption units are symmetrically arranged on two sides of the ship body 1; the oil suction device further comprises telescopic driving mechanisms 10, and each oil suction unit is connected with one telescopic driving mechanism 10. Specifically, the telescopic driving mechanism 10 includes a driving assembly, a first screw 102, a second screw 103, a third screw 104, three guide cylinders 101, and three bearing blocks 105. The guide cylinder 101 is installed on the ship body 1, the cross section of the first support arm 31 is rectangular, and the first support arm 31 penetrates through the ship body 1 and then is in form-fitting sliding fit in the guide cylinder 101. The first screw 102 is screwed with the second arm 32 near the bow, the second screw 103 is screwed with the second arm 32 in the middle, and the third screw 104 is screwed with the second arm 32 near the stern. The threads of the first screw 102, the second screw 103 and the third screw 104 are single threads, and the thread pitches of the first screw 102, the second screw 103 and the third screw 104 are gradually increased in sequence. The bearing housing 105 is installed on the hull 1, and the first screw 102, the second screw 103 and the third screw 104 are respectively rotatably connected with one bearing housing 105. The driving assembly is used for driving the first screw rod 102, the second screw rod 103 and the third screw rod 104 to rotate.
By designing the pitches of the first screw 102, the second screw 103 and the third screw 104 to be gradually increased, the first arm 31 does not rotate relative to the guide cylinder 101 because the first arm 31 has a rectangular cross section and is fit in the guide cylinder 101 in a form-fitting manner. When the driving assembly drives the first screw 102, the second screw 103 and the third screw 104 to rotate synchronously, the first screw 102 with a smaller pitch drives the first arm 31 in threaded fit with the first screw to move along the guide cylinder 101 for a short distance, the second screw 103 with a middle pitch drives the first arm 31 in threaded fit with the first screw to move along the guide cylinder 101 for a middle distance, and the third screw 104 with a largest pitch drives the first arm 31 in threaded fit with the third screw to move along the guide cylinder 101 for a long distance, so that the length of the three first arms 31 extending into the ship body 1 is gradually increased, therefore, the three first arms 31 along the direction from the bow to the stern are arranged in a ladder structure, when the second arm 32 is rotated and folded to one side of the ship body 1, the three second arms 32 on the same side cannot interfere with each other, and the occupied space of the recovery device in a parking place is effectively reduced, the overall structure of the recovery equipment is optimized, and the shape of the recovery equipment is more concise and beautiful.
When the collecting work is needed, the second support arm 32 close to the bow is firstly opened, the second support arm 32 in the middle of the hull is then opened, and the second support arm 32 close to the stern is finally opened, so that collision interference during rotation is avoided. Then, the driving assembly is started to drive the first screw 102, the second screw 103 and the third screw 104 to synchronously rotate, the first screw 102 with a smaller pitch can drive the first arm 31 in threaded fit with the first screw to move in a short distance along the guide cylinder 101, the second screw 103 with a middle pitch can drive the first arm 31 in threaded fit with the second screw to move in a middle distance along the guide cylinder 101, the third screw 104 with a largest pitch can drive the first arm 31 in threaded fit with the third screw to move in a long distance along the guide cylinder 101, and finally the three first arms 31 extend out of the hull 1 to be basically the same, so that the structural design of the oil suction system is optimized.
In one embodiment, the driving assembly comprises a telescopic driving motor 106, a transmission chain 107, a driving chain wheel 108 and three driven chain wheels 109, wherein one driven chain wheel 109 is fixedly arranged on each of the first screw 102, the second screw 103 and the third screw 104, the telescopic driving motor 106 is arranged on the hull 1, the driving chain wheel 108 is connected to an output shaft of the telescopic driving motor 106, and the transmission chain 107 is wound and meshed on the driving chain wheel 108 and the three driven chain wheels 109.
In the description of the present invention, numerous specific details are set forth. However, it is understood that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure an understanding of this description.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention, and they should be construed as being included in the following claims and description.