CN112874741A - Marine propeller capable of preventing accidental injury of aquatic large-scale fishes and mammals - Google Patents

Marine propeller capable of preventing accidental injury of aquatic large-scale fishes and mammals Download PDF

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Publication number
CN112874741A
CN112874741A CN202110306618.0A CN202110306618A CN112874741A CN 112874741 A CN112874741 A CN 112874741A CN 202110306618 A CN202110306618 A CN 202110306618A CN 112874741 A CN112874741 A CN 112874741A
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CN
China
Prior art keywords
propeller
mammals
space
shaft
piece
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Withdrawn
Application number
CN202110306618.0A
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Chinese (zh)
Inventor
尹爱识
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Shenzhen Guanjian Trading Co ltd
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Shenzhen Guanjian Trading Co ltd
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Priority to CN202110306618.0A priority Critical patent/CN112874741A/en
Publication of CN112874741A publication Critical patent/CN112874741A/en
Withdrawn legal-status Critical Current

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B63SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63HMARINE PROPULSION OR STEERING
    • B63H5/00Arrangements on vessels of propulsion elements directly acting on water
    • B63H5/07Arrangements on vessels of propulsion elements directly acting on water of propellers
    • B63H5/16Arrangements on vessels of propulsion elements directly acting on water of propellers characterised by being mounted in recesses; with stationary water-guiding elements; Means to prevent fouling of the propeller, e.g. guards, cages or screens
    • B63H5/165Propeller guards, line cutters or other means for protecting propellers or rudders

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Catching Or Destruction (AREA)

Abstract

The invention discloses a marine propeller capable of preventing accidental injury to aquatic large-scale fishes and mammals, which comprises a propeller support piece (11), wherein a protection mechanism space (12) is arranged in the propeller support piece (11), an underwater radar device is arranged in the device and can automatically detect underwater fish schools or large-scale underwater organisms such as sharks and marine mammals, the protection device can extend out of the device when the device is started, the protection device in a contraction state is opened, a protection net is opened at the front side of the propeller and can prevent small fishes from being sucked by the propeller to cause death of the fish schools and fishy smell from spreading in the sea, a through hole can prevent the influence on the advancing power of a ship, the side surface of the propeller blocks most of the propeller after the device is opened, the large-scale organisms are prevented from approaching the side surface of the propeller and being cut by the propeller, and the situation that the aquatic organisms chase the ship can be effectively reduced, and the probability of preventing large organisms from being cut by the propeller.

Description

Marine propeller capable of preventing accidental injury of aquatic large-scale fishes and mammals
Technical Field
The invention relates to the field of marine equipment, in particular to a marine propeller capable of preventing large-scale fishes and mammals in water from being accidentally injured.
Background
The propellers used on large ships are huge, the rotating water flow generated by the high-speed rotation of the huge propellers is enough to bring nearby fishes into the propellers for mincing, large marine organisms such as sharks are sensitive to bloody smell, the large marine organisms can quickly swim to the nearby aircraft carriers to eat foods after smelling the smells, when the large fishes and the marine mammals are close to the propeller position of the ship, the large aquatic organisms can be further damaged, the organisms are difficult to recover by self recovery capability after being hit by the propellers, the marine ecology changes are caused over time, and finally human beings are affected, so that the problem is improved by the marine propeller capable of preventing the large fishes and the marine mammals in water from being accidentally injured.
Disclosure of Invention
The invention aims to provide a marine propeller capable of preventing accidental injury to large-sized fish and mammals in water, which can overcome the defects of the prior art and improve the practicability of equipment.
In a preferred embodiment, the propeller support is provided with a protection mechanism space, the protection mechanism space is provided with a protection mechanism, the left side wall of the protection mechanism space is rotatably provided with a propeller shaft, the propeller shaft extends rightwards into an outer space, the right side of the propeller shaft is provided with a propeller, the propeller is rotated to push a ship to advance, but aquatic organisms can be injured or even die, the propeller support is viewed from the side, as shown in figure 2, the lateral width of the propeller support is smaller than the diameter of the propeller, as the propeller rotates, water on the front side of the propeller is sucked around the propeller and then pushed out towards the rear side, so that a backward thrust which moves forwards is obtained, so that the width of the propeller support is smaller than the diameter of the propeller, preventing blocking of the water flow.
In a preferred embodiment, as shown in FIG. 1, the underside of the propeller support is provided with a sonar system by emitting sound waves into the sea and then receiving the fed back sound waves.
In a preferred embodiment, the protection mechanism space left side wall is equipped with the telescopic sleeve axle, the telescopic sleeve axle can stretch out and draw back, the telescopic sleeve axle is hollow, it is equipped with the screw thread pivot to rotate between the protection mechanism space lateral wall, the screw thread pivot has power input, the lateral wall slides and is equipped with the slip and rotates the connecting piece under the protection mechanism space, it is equipped with the torsion piece to rotate in the slip and rotate the connecting piece, the torsion piece rotates to be installed on the part that can stretch out on telescopic sleeve axle right side, the telescopic sleeve axle with be equipped with the torsional spring between the torsion piece, the slip rotates the connecting piece left side and is equipped with the worm axle, the worm axle front side is equipped with the worm, the torsion piece outer lane is equipped with the worm wheel, the worm wheel of torsion piece outer lane with mesh between.
In preferred embodiment, the upper right side of torsion member is equipped with the active rod, flexible sleeve axle rotates from a left side to the right side in proper order and is equipped with six connecting rods and drive the pole, the connecting rod with two liang of cooperations of drive pole, the connecting rod with adjacent it is articulated through the hinge bar between the drive pole, it is equipped with the protection network to drive between the pole, be equipped with tiny hole on the protection network, can let water pass through, and prevent the passing through of little fish.
In a preferred embodiment, as shown in fig. 4, an extending space is provided on the right side of the driving rod, a fixed block is provided on the lower side of the extending space, an active rod is provided on the front side of the fixed block in a power hinge joint manner, a passive rod is hinged on the rear side of the fixed block, fixed wheels are provided on the upper and lower sides of the passive rod, a short shaft is provided on the front side of each fixed wheel, a hinge element is provided between the active rod, the short shaft on the front side of the fixed wheel and the next fixed wheel and the passive rod, the hinge element is used for connecting the passive rod, and two adjacent fixed wheels are engaged for transmission.
In a preferred embodiment, the driven rod has a built-in space therein, as shown in fig. 5, a circular sliding member is slidably disposed between side walls of the built-in space, the circular sliding member can slide to extend to the left, and the track is a circle center with a certain diameter, the rear side wall of the built-in space is rotatably disposed with a driving gear shaft having power input, the right side of the propeller shaft is disposed with a slot, when the driving gear shaft is actuated, the driving gear shaft rotates in a forward direction, such that each circular sliding member extends from the built-in space and then contacts with the slot of the next driven rod, the circular sliding member can enclose a sleeve around the propeller for preventing large aquatic animals from contacting with the propeller, and the engagement between the slot and the circular sliding member can enhance the overall structural strength, the propeller is protected from being damaged due to the fact that extra force is generated under the action of the propeller and the slender passive rod piece is close to the propeller, protection is not provided on the right side of the propeller, small fish shoal can only push towards the right side when the small fish shoal is located on the rear side of the propeller and cannot be involved in the propeller, and large aquatic animals are separated from the propeller and cannot be injured by the rear side of the propeller.
The invention has the beneficial effects that: the invention provides a ship propeller capable of preventing accidental injury to aquatic large-scale fishes and mammals, which is provided with an underwater radar device, can automatically detect underwater fish swarms or large-scale underwater organisms such as sharks and marine mammals, and further controls the device, the device can extend out of the device when being started, the protection device in a contraction state is opened, a protection net is opened at the front side of the propeller after the protection net is opened, the size of the net is similar to that of the device, the net has no elasticity, when the propeller rotates, water at the front side and the periphery is sucked into the periphery of the propeller and is sprayed backwards, so that when fish swarms exist, the fish swarms can be sucked in from the front side, the protection net can prevent small fish from being sucked into the propeller to cause death of the fish swarms, and the protection net has through holes to prevent influencing the advancing power of ships, after the device is opened, the device extends out to block most of the side surface of the propeller, so that large organisms can be prevented from being cut by the propeller and being close to the side surface of the propeller, the situation that aquatic organisms chase the ship can be effectively reduced, and the probability that the large organisms are cut by the propeller is prevented.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the invention, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.
The invention is further illustrated with reference to the following figures and examples.
Fig. 1 is a schematic view showing the overall structure of a marine propeller capable of preventing accidental injury to large-sized fish mammals in water according to the present invention.
Fig. 2 is a schematic view of the structure a-a in fig. 1.
Fig. 3 is a schematic structural view of the active lever of fig. 1 in a fully opened state.
Fig. 4 is a schematic structural view of the driving rod in fig. 1.
Fig. 5 is a schematic view of the structure of the propeller shaft of fig. 4.
Detailed Description
The invention will now be described in detail with reference to fig. 1-5, wherein for ease of description the orientations described hereinafter are now defined as follows: the up, down, left, right, and front-back directions described below correspond to the up, down, left, right, and front-back directions in the projection relationship of fig. 1 itself.
With reference to fig. 1-5, the marine propeller capable of preventing accidental injuries to aquatic large-sized fish and mammals comprises a propeller support 11, a protection mechanism space 12 is provided in the propeller support 11, a protection mechanism is provided in the protection mechanism space 12, a propeller shaft 24 is rotatably provided on a left side wall of the protection mechanism space 12, the propeller shaft 24 extends rightwards into an outer space, a propeller 25 is provided on a right side of the propeller shaft 24, the propeller 25 rotates to push the ship to advance, but aquatic organisms are injured or even dead, the propeller support 11 is viewed from a side, as shown in fig. 2, a lateral width of the propeller support 11 is smaller than a diameter of the propeller 25, and as the propeller 25 rotates, water flow in front of the propeller 25 is sucked around the propeller 25 and then pushed out towards a rear side, so that a reverse thrust is obtained forward and the ship is forward, the width of the propeller support 11 is smaller than the diameter of the propeller 25 to prevent blocking of the water flow.
As shown in fig. 1, a sonar system 23 is provided under the propeller support 11, the sonar system 23 emits sound waves into seawater and receives the fed back sound waves, when there is a large fish or a large aquatic animal or a marine mammal underwater, the sonar system 23 can detect the sound waves and then start the device through a built-in line.
The left side wall of the protection mechanism space 12 is provided with a telescopic sleeve shaft 17, the telescopic sleeve shaft 17 can be stretched, the telescopic sleeve shaft 17 is hollow, a thread rotating shaft 13 is rotatably arranged between the side walls of the protection mechanism space 12, the thread rotating shaft 13 has power input, the lower side wall of the protection mechanism space 12 is slidably provided with a sliding rotating connecting piece 14, a torsion piece 16 is rotatably arranged in the sliding rotating connecting piece 14, the torsion piece 16 is rotatably arranged on the extensible part on the right side of the telescopic sleeve shaft 17, a torsion spring 18 is arranged between the telescopic sleeve shaft 17 and the torsion piece 16, the left side of the sliding rotating connecting piece 14 is provided with a worm shaft 15, the front side of the worm shaft 15 is provided with a worm, the outer ring of the torsion piece 16 is provided with a worm wheel, the worm wheel on the outer ring of the torsion piece 16 is meshed with the worm on the front side of the worm shaft 15, when the sonar system 23 detects that large fish groups or large aquatic animals or marine mammals exist, the threaded shaft 13 is positively actuated to move the sliding-rotating link 14 to the right with the torque element 16 and the worm shaft 15 and the extendable portion of the right side of the telescoping shaft 17, bringing the torque element 16 and the extendable portion of the telescoping shaft 17 close to the propeller 25, and then the worm shaft 15 is positively actuated for a period of time to rotate the torque element 16 one revolution about the telescoping shaft 17.
The upper right side of the torsion piece 16 is provided with a driving rod 19, the telescopic sleeve shaft 17 is sequentially rotated from left to right to be provided with six connecting rods 21 and driving rods 22, the connecting rods 21 and the driving rods 22 are matched in pairs, the connecting rods 21 and the adjacent driving rods 22 are hinged through hinge rods 20, protective nets 40 are arranged between the driving rods 22, fine holes are formed in the protective nets 40, water can pass through the protective nets, and small fish can be prevented from passing through the protective nets, as shown in fig. 3, when the torsion piece 16 rotates for a circle, firstly the driving rod 19 rotates, then a first group of hinge rods 20 is pulled to be opened, then the first connecting rod 21 rotates, then the subsequent driving rod 22 and the connecting rod 21 are sequentially driven to be opened, finally, a complete circle is formed in front of the propeller 25, and meanwhile the protective nets 40 are opened, at this time, as the propeller 25 continues to rotate, water flows through the protective net 40, and as the protective net 40 does not have much elasticity, the water flows cannot be elongated and wound on the propeller 25, and meanwhile, the small holes formed in the protective net 40 enable the water to flow in and to be sprayed out in a rightward accelerating mode through the propeller 25, or a pushing force has little influence on the pushing force, and meanwhile, small fish groups are prevented from being stirred by the propeller 25, so that the bloody smell around the propeller 25 is not large, and therefore, large fishes such as sharks and the like which seek food by the bloody smell in the water cannot be attracted.
As shown in fig. 4, an extending space 27 is provided on the right side of the driving rod 22, a fixed block is provided on the lower side of the extending space 27, an active rod member 41 is provided on the front side of the fixed block in a power hinge joint manner, a passive rod member 42 is provided on the rear side of the fixed block in a hinge joint manner, fixed wheels 43 are provided on the upper and lower sides of the passive rod member 42, a short shaft is provided on the front side of each fixed wheel 43, a hinge member 26 is provided between the active rod member 41, the short shaft on the front side of the fixed wheel 43 and the next fixed wheel 43 and the passive rod member 42, the hinge member 26 functions to connect the passive rod members 42, two-by-two meshing transmission is performed between the adjacent fixed wheels 43, when the first active rod member 41 rotates ninety degrees clockwise, the first passive rod member 42 also rotates ninety degrees clockwise due to the meshing effect of the fixed wheels 43, and the hinge member 26 functions to hinge the second passive rod, at this time, the fixed wheel 43 on the upper side of the second passive rod 42 carries the second passive rod 42 to rotate ninety degrees counterclockwise relative to the hinge 26, and the third passive rod 42 rotates ninety degrees clockwise, so that the passive rod 42 originally received in the extending space 27 extends rightward, the passive rod 42 is arranged in each driving rod 22, and the propeller 25 can be wrapped by the six passive rods 42 in total.
The driven rod member 42 is provided with an inner space 28, as shown in fig. 5, a circular sliding member 28 is slidably provided between the side walls of the inner space 28, the circular sliding member 28 can slide and extend to the left, and the track is a circle center with a certain diameter, the rear side wall of the inner space 28 is rotatably provided with a driving gear shaft 29, the driving gear shaft 29 has power input, the right side of the propeller shaft 24 is provided with a clamping groove 31, when the driving gear shaft 29 is started, the driving gear shaft 29 rotates in a forward direction, so that each circular sliding member 28 extends from the inner space 28 and then contacts with the clamping groove 31 of the next driven rod member 42, the circular sliding member 28 can enclose a sleeve which prevents large aquatic animals from contacting with the propeller 25 around the propeller 25, and the cooperation between the clamping groove 31 and the circular sliding member 28 can play a role of strengthening the whole structural strength, the situation that the slender driven rod 42 is close to the propeller 25 to cause the propeller 25 to be damaged due to the generation of extra force under the action of the propeller 25 is prevented, no protection is provided on the right side of the propeller 25, small fish shoal is pushed only to the right side when the rear side of the propeller 25 is located, and cannot be involved in the propeller 25, and large aquatic animals are separated from the propeller 25, so that the rear side of the propeller 25 cannot be injured.
In one embodiment, when a large fish or a large aquatic animal or a marine mammal is underwater, the sonar system 23 can detect and then activate the device through the built-in wires, when the sonar system 23 detects a large fish or a large aquatic animal or a marine mammal, the threaded rotating shaft 13 is positively activated, so that the sliding rotating link 14 carries the torsion member 16 and the worm shaft 15 and the extendable portion of the right side of the telescopic sleeve shaft 17 to the right, the torsion member 16 and the extendable portion of the telescopic sleeve shaft 17 are close to the position of the propeller 25, then the worm shaft 15 is positively activated for a period of time, so that the torsion member 16 rotates around the telescopic sleeve shaft 17 for one circle, and during one circle of rotation of the torsion member 16, the driving rod 19 rotates first, then the first group of the hinged rods 20 is pulled to be opened, then the first connecting rod 21 is rotated, then the subsequent driving rod 22 and the connecting rod 21 are sequentially opened, finally a complete circle is formed in front of the propeller 25, the protective net 40 is opened, at this time, as the propeller 25 continues to rotate, water flow can pass through the protective net 40, as the protective net 40 does not have much elasticity, the water flow can not stretch the protective net and wind on the propeller 25, meanwhile, the small holes arranged on the protective net 40 can enable the water flow to accelerate to be sprayed out rightwards through the propeller 25, or a driving force has little influence on the driving force, meanwhile, small fish groups are prevented from being stirred and killed by the propeller 25, the bloody smell around the propeller 25 can not be made to be large, and therefore, some large fishes such as sharks and the like which seek food by bloody smell in water can not be attracted, when the driving rod 19 rotates three hundred sixty degrees, during the clockwise rotation of the first driving rod 41 by ninety degrees, the first driven rod 42 also rotates ninety degrees clockwise, due to the meshing action of the fixed wheel 43 and due to the function of the hinge 26 to hinge the second driven rod 42, the fixed wheel 43 on the upper side of the second driven rod 42 drives the second driven rod 42 to rotate ninety degrees counterclockwise relative to the hinge 26, the third driven rod 42 rotates ninety degrees clockwise, so that the driven rod 42 originally stored in the extending space 27 extends rightward, the driven rod 42 is arranged in each driving rod 22, and the total of six driven rods 42 can wrap the propeller 25 from the periphery, and then the driving gear shaft 29 is started, the driving gear shaft 29 is rotated in a forward direction so that each of the ring slides 28 protrudes from the built-in space 28 and then comes into contact with the catch 31 of the next one of the propeller shafts 24, the ring slides 28 can enclose a sleeve around the propeller 25 that prevents a large aquatic animal from coming into contact with the propeller 25, and the engagement between the catch 31 and the ring slides 28 can serve to reinforce the overall structural strength.
The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.

Claims (6)

1. A marine propeller capable of preventing accidental injury to aquatic large-sized fishes and mammals comprises a propeller support member (11), wherein a protection mechanism space (12) is arranged in the propeller support member (11), a protection mechanism is arranged in the protection mechanism space (12), a propeller shaft (24) is rotatably arranged on the left side wall of the protection mechanism space (12), the propeller shaft (24) extends rightwards to an outer space, a propeller (25) is arranged on the right side of the propeller shaft (24), the propeller (25) can push a ship to advance, but aquatic organisms can be injured or even die, the propeller support member (11) is observed from the side, the width of the side surface of the propeller support member (11) is smaller than the diameter of the propeller (25), and water flow on the front side of the propeller (25) is sucked to the periphery of the propeller (25) and then pushed out to the rear side when the propeller (25) rotates, so as to obtain a reverse thrust of forward direction, making the boat forward, the width of the propeller support (11) must be smaller than the diameter of the propeller (25) to prevent blocking of the water flow.
2. A propeller for boats capable of preventing accidental injury to large fish mammals in water as set forth in claim 1, wherein: the lower side of the propeller support (11) is provided with a sonar system (23), and the sonar system (23) transmits sound waves into seawater and then receives the fed back sound waves.
3. A propeller for boats capable of preventing accidental injury to large fish mammals in water as set forth in claim 1, wherein: protection mechanism space (12) left side wall is equipped with flexible sleeve (17), flexible sleeve (17) can stretch out and draw back, flexible sleeve (17) is hollow, it is equipped with screw thread pivot (13) to rotate between protection mechanism space (12) lateral wall, screw thread pivot (13) have power input, protection mechanism space (12) downside wall slides and is equipped with slip rotation connecting piece (14), it is equipped with torsion member (16) to rotate in rotation connecting piece (14), torsion member (16) rotate to be installed on the part that can stretch out on flexible sleeve (17) right side, flexible sleeve (17) with be equipped with torsional spring (18) between torsion member (16), slip rotation connecting piece (14) left side is equipped with worm axle (15), worm axle (15) front side is equipped with the worm, torsion member (16) outer lane is equipped with the worm wheel, and a worm wheel on the outer ring of the torsion piece (16) is meshed with a worm on the front side of the worm shaft (15).
4. A propeller for boats capable of preventing accidental injury to large fish mammals in water as set forth in claim 1, wherein: twist reverse piece (16) upper right side is equipped with drive lever (19), flexible sleeve axle (17) rotate from a left side to the right side in proper order and are equipped with six connecting rods (21) and drive pole (22), connecting rod (21) with two liang of cooperations of drive pole (22), connecting rod (21) and adjacent it is articulated through hinge bar (20) between drive pole (22), be equipped with protection network (40) between drive pole (22), be equipped with tiny hole on protection network (40), can let water pass through, and prevent passing through of little fish.
5. A propeller for boats capable of preventing accidental injury to large fish mammals in water as set forth in claim 1, wherein: drive pole (22) right side and be equipped with and stretch out space (27), it is equipped with a fixed block to stretch out space (27) downside, and this fixed block front side power is articulated to be equipped with initiative member (41), and this fixed block rear side articulates there is passive member (42), downside all is equipped with tight pulley (43) on passive member (42), every tight pulley (43) front side is equipped with a minor axis, initiative member (41) the minor axis of tight pulley (43) front side with next tight pulley (43) with be equipped with articulated elements (26) between passive member (42), articulated elements (26) play and connect the effect of passive member (42), it is adjacent two liang of meshing transmission between tight pulley (43).
6. A propeller for boats capable of preventing accidental injury to large fish mammals in water as set forth in claim 1, wherein: the driven rod piece (42) is internally provided with an internal space (28), an annular sliding piece (28) is arranged between the side walls of the internal space (28) in a sliding manner, the annular sliding piece (28) can slide and extend leftwards, the track is a circle center with a certain diameter, the rear side wall of the internal space (28) is rotatably provided with a driving gear shaft (29), the driving gear shaft (29) has power input, the right side of the propeller shaft (24) is provided with a clamping groove (31), after the driving gear shaft (29) is started, the driving gear shaft (29) rotates forwards, so that each annular sliding piece (28) extends out of the internal space (28) and then contacts with the clamping groove (31) of the next driven rod piece (42), and the annular sliding piece (28) can enclose a sleeve which prevents large aquatic animals from contacting with the propeller (25) around the propeller (25), and the cooperation between the clamping groove (31) and the annular sliding piece (28) can play a role of strengthening the whole structural strength, prevent the situation that the screw propeller (25) is damaged due to the fact that the slender passive rod piece (42) is close to the screw propeller (25) because of generating extra force under the action of the screw propeller (25), and the right side of the screw propeller (25) is not provided with protection, small fish shoal can only push towards the right side when the rear side of the screw propeller (25) is not involved in the screw propeller (25), and large aquatic animals are separated from the screw propeller (25), so the large aquatic animals can not be injured by the rear side of the screw propeller (25).
CN202110306618.0A 2021-03-23 2021-03-23 Marine propeller capable of preventing accidental injury of aquatic large-scale fishes and mammals Withdrawn CN112874741A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110306618.0A CN112874741A (en) 2021-03-23 2021-03-23 Marine propeller capable of preventing accidental injury of aquatic large-scale fishes and mammals

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110306618.0A CN112874741A (en) 2021-03-23 2021-03-23 Marine propeller capable of preventing accidental injury of aquatic large-scale fishes and mammals

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Publication Number Publication Date
CN112874741A true CN112874741A (en) 2021-06-01

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115258113A (en) * 2022-08-22 2022-11-01 江苏科技大学 Automatic folding flow guide pipe capable of preventing marine fishes from being accidentally injured

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115258113A (en) * 2022-08-22 2022-11-01 江苏科技大学 Automatic folding flow guide pipe capable of preventing marine fishes from being accidentally injured

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Application publication date: 20210601