Retractable hull bottom air injection reducing barrier plate

Abstract

The utility model discloses a retractable ship bottom air injection barrier plate. One end of the L-shaped baffle is hinged to the left side and the right side of the bottom of a ship body and the tail end of the bottom of the ship body, the stepped installation groove is located in the bottom of the ship body and matched with the baffle, the pull rod is hinged to the other end of the baffle, and the telescopic assembly is hinged to the pull rod and used for driving the baffle to be stored and unfolded. And in a storage state, the baffle is positioned in the stepped mounting groove and is flush with the bottom surface of the ship body. The baffles on the two sides of the bottom of the ship body can prevent an air layer or bubbles from overflowing from the side face when the ship moves on the basis that the stability of the air layer or bubbles at the bottom of the ship body is maintained, and the baffle at the tail end of the bottom of the ship body can prevent the air layer or bubble flow from affecting a tail propelling system. The baffle can be stored at the ship bottom when not used, the overall energy loss of the ship can be reduced, and the baffle at the tail end of the bottom of the ship body is obliquely arranged at the tail of the ship bottom to play a diversion role.

Description

Technical Field

[0001] The utility model relates to a jet-injection and blocking plate, in particular to a retractable jet-injection and blocking plate on the bottom of a ship. Background Art

[0002] Jet drag reduction technology is commonly used in ships. It is mainly divided into bubble drag reduction and air layer drag reduction. The purpose of drag reduction is achieved by changing the contact medium on the bottom surface of the ship, thereby reducing the friction resistance encountered by the ship during navigation.

[0003] To achieve ideal drag reduction effects, bubble and air layer drag reduction require a stable bubble flow or air layer. Existing jet drag reduction technologies rely on multi-stage jet generators to maintain the stability of the air layer. These devices require a cavity in the ship's bottom to house them, making the overall structure complex. Furthermore, the bubbles or air layer flows formed under the ship by jet drag reduction can affect the performance and structure of the ship's propellers and other propulsion systems. Utility Model Content

[0004] Purpose of the utility model: The purpose of the utility model is to provide a retractable bottom jet anti-blocking plate that can maintain the stability of bubbles and air layers and protect the propulsion system.

[0005] Technical solution: The utility model discloses a retractable bottom jet-reducing baffle, comprising an L-shaped baffle with one end hinged to the left and right sides of the hull bottom and the tail end of the hull bottom, a stepped mounting groove located at the bottom of the hull and adapted to the baffle, a pull rod hinged to the other end of the baffle, and a telescopic assembly hinged to the pull rod and used to drive the baffle to be stored and expanded; in the stored state, the baffle is located in the stepped mounting groove and is flush with the bottom surface of the hull; in the expanded state, the angles between the baffles on the left and right sides of the hull bottom and the bottom surface of the hull are right angles, and the angle between the baffle at the tail end of the hull bottom and the bottom surface of the hull is an acute angle or a right angle.

[0006] The telescopic assembly includes a telescopic pump fixedly mounted on a stepped mounting groove, a telescopic rod fixedly connected to the movable end of the telescopic pump, a guide plate arranged parallel to the telescopic rod and located on both sides of the telescopic rod, a guide groove opened on the inner side of the guide plate, a connecting rod fixedly connected to the front end of the telescopic rod, and a slider fixedly connected to both ends of the connecting rod and movable back and forth along the guide groove, wherein the connecting rod is rotatably connected to the pull rod.

[0007] Furthermore, the telescopic assembly also includes an air pump fixedly installed inside the hull, an air pipe connected to the output port of the air pump, and a control switch connected to the air pump via a cable. The end of the air pipe away from the air pump passes through the hull and is connected to the telescopic pump.

[0008] Furthermore, the two baffles at the rear end of the bottom of the hull are spliced ​​to form a V shape.

[0009] Furthermore, the baffles located on both sides of the bottom of the hull are linear.

[0010] Furthermore, a plurality of groups of pull rods and telescopic components cooperating with the pull rods are provided on one side of the baffle, and the plurality of groups of pull rods are arranged at equal intervals.

[0011] Furthermore, the height of the baffle is δ, and the calculation formula of δ is as follows:

[0012]

[0013] Where x is the length from bow to midship, Re x is the maximum Reynolds number at the midship position when the ship is sailing.

[0014] Furthermore, an elastic sealing strip is installed on the top of the baffle to increase the sealing performance.

[0015] Beneficial effects: Compared with the existing technology, the utility model has the following advantages: the baffles on both sides of the bottom of the hull can prevent the air layer or bubbles from overflowing from the sides when the ship is moving while maintaining the stability of the air layer or bubbles at the bottom of the ship; the baffles at the tail end of the bottom of the hull can avoid the influence and damage of the air layer or bubble flow on the tail propulsion system; the baffles are installed in a retractable manner and can be stored at the bottom of the ship when not in use, which can reduce the overall energy loss of the ship; the baffles at the tail end of the bottom of the hull can also be not fully opened and placed obliquely at the tail of the bottom of the ship to play a diversion role; the overall structure is simple, and it is easy to manufacture and install. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the structure of the baffle of the present invention when it is stored;

[0017] Figure 2 This is a schematic diagram of the structure of the baffle of the utility model when it is opened;

[0018] Figure 3 This is a bottom view of the baffle of the utility model when it is opened;

[0019] Figure 4 For the utility model Figure 3 Enlarged view of point A in the middle;

[0020] Figure 5 A side view of the hull of the present invention;

[0021] Figure 6 It is a bottom view of the hull of the present utility model. DETAILED DESCRIPTION

[0022] The technical solution of the present utility model will be further described below with reference to the accompanying drawings.

[0023] The utility model is a retractable ship bottom jet reducing baffle, comprising a baffle 2, a pull rod 3, a telescopic pump 4, a telescopic rod 5, a connecting rod 6, a slider 7, a guide plate 8, an air pump 9, an air pipe 10 and a control switch 11. Figure 5 and Figure 6 As shown, there are four baffles 2, and the baffles 2 are connected to the hull 1. The connection method is preferably hinged, but not limited to other connection methods, two of which are connected to both sides of the bottom of the hull 1, and the baffles 2 located on both sides of the bottom of the hull 1 are linear, and the two baffles 2 located at the tail end of the bottom of the hull 1 are spliced ​​to form a V shape, and the two linear baffles 2 are symmetrically arranged on both sides of the V-shaped baffle 2. The baffles 2 on both sides of the bottom of the hull 1 can maintain the stability of the air layer or bubbles at the bottom of the ship and prevent the air layer or bubbles from overflowing from the side when the ship moves. The two baffles 2 at the tail end of the bottom of the hull 1 form a V shape, which is beneficial to forming a protection zone to protect the tail propulsion system on the one hand, and to reducing the resistance of the ship's advance on the other hand. An elastic sealing strip is installed on the top of the baffle 2. When the baffle 2 is opened, the elastic sealing strip can enhance the sealing between the baffle 2 and the hull 1; the height of the baffle 2 is δ, and the calculation formula of δ is as follows:

[0024]

[0025] Where x is the length from bow to midship, Re x is the maximum Reynolds number at the midship position when the ship is sailing.

[0026] like Figures 1 to 4As shown, one end of the pull rod 3 is rotatably connected to the baffle 2, and the other end of the pull rod 3 is rotatably connected to the connecting rod 6; the telescopic pump 4, telescopic rod 5, connecting rod 6, slider 7, guide plate 8, air pump 9, air pipe 10 and control switch 11 constitute a telescopic assembly, and the telescopic assembly drives the baffle 2 to be retracted and expanded through the pull rod 3. A stepped mounting groove 12 adapted to the baffle 2 is provided at the bottom of the hull 1. The baffle 2 is L-shaped. When the baffle 2 is retracted, it is completely retracted in the stepped mounting groove 12 and fits in with the hull 1, and the right angle of the baffle 2 is adapted to the step of the stepped mounting groove 12. When the baffle 2 is fully retracted, the bottom of the baffle 2 is flush with the bottom of the hull 1. The baffles 2 on both sides of the bottom of the hull 1 are at a right angle to the bottom of the hull 1 when they are expanded. The baffle 2 at the tail end of the bottom of the hull 1 is at an acute angle or a right angle to the bottom of the hull 1 when it is expanded. One side of the baffle 2 is provided with multiple groups of pull rods 3 and telescopic components that cooperate with the pull rods 3, and the multiple groups of pull rods 3 are arranged at equal intervals. The air pump 9 and the control switch 11 are fixedly installed inside the hull 1, the telescopic pump 4 is fixedly installed in the stepped installation groove 12, and the telescopic pump 4 is located on the upper side of the baffle. The control switch 11 is connected to the air pump 9 through a cable, and the air pump 9 can be controlled to operate through the control switch 11. One end of the air pipe 10 is connected to the air delivery port of the air pump 9. The hull 1 is provided with a through hole for the air supply pipe 10 to pass through, and a sealing ring is installed at the through hole. The other end of the air pipe 10 extends out of the hull 1 and is connected to the telescopic pump 14. One end of the telescopic rod 5 is connected to the movable end of the telescopic pump 4. The telescopic pump 4 controls the telescopic rod 5 to extend and retract, and the other end of the telescopic rod 5 is connected to the connecting rod 6; the guide plate 8 is fixedly installed in the installation operation, and there are two guide plates 8. The guide plates 8 are arranged parallel to the telescopic rod 5, and the two guide plates 8 are symmetrically arranged on both sides of the telescopic rod 5. The opposite sides of the two guide plates 8 are provided with guide grooves slidably connected to the sliders 7. The two sliders 7 are respectively fixedly connected to the two ends of the connecting rod 6. The telescopic rod 5 can push and pull the connecting rod 6 and the slider 7 to move along the guide grooves of the guide plates 8 under the control of the telescopic pump 4.

[0027] Working process: When the baffle 2 needs to be used, the air pump 9 is controlled to operate through the control switch 11, that is, the air pump 9 is controlled to deliver gas through the air pipe 10 to control the telescopic pump 4. The telescopic pump 4 controls the movement of the telescopic rod 5, so that the telescopic rod 5 extends, and the slider 7 and the connecting rod 6 move under the drive of the telescopic rod 5, so that the connecting rod 6 moves synchronously with the pull rod 3. When the end of the pull rod 3 moves to the step of the stepped mounting groove 12, the telescopic rod 5 continues to extend, and the pull rod 3 rotates downward at the step under the action of the telescopic rod 5, thereby causing the pull rod 3 to rotate and open the baffle 2 until the baffle 2 is perpendicular to the hull 1. The baffles 2 on both sides of the bottom of the hull 1 are opened to maintain the air layer or bubble at the bottom of the ship. The stability of the ship can be guaranteed, and at the same time, it can prevent the air layer or bubbles from overflowing from the side when the ship is moving. The baffle 2 at the rear end of the bottom of the hull 1 is opened to avoid the influence and damage of the air layer or bubble flow on the rear propulsion system of the hull 1; when the baffle 2 is not needed, the telescopic rod 5 can be controlled to retract by the control switch 1 until the baffle 2 is completely stored in the stepped installation groove 12, which can reduce the overall energy loss of the ship; when necessary, the telescopic rod 5 can be controlled to extend to the specified position by the control switch 11, so that the baffle 2 at the rear end of the bottom of the hull 1 is not fully opened and is placed obliquely at the rear end of the bottom of the ship. At this time, the angle between the baffle 2 and the hull 1 is an acute angle, so that the baffle 2 plays a guiding role during the navigation of the ship.

Claims

1. A retractable ship bottom jet-reducing and blocking plate, characterized by: The invention comprises an L-shaped baffle (2) whose one end is hinged to the left and right sides of the bottom of the hull (1) and the tail end of the bottom of the hull (1), a stepped installation groove (12) located at the bottom of the hull (1) and adapted to the baffle (2), a pull rod (3) hinged to the other end of the baffle (2), and a telescopic component hinged to the pull rod (3) and used for driving the baffle (2) to be stored and expanded; in the stored state, the baffle (2) is located in the stepped installation groove (12) and is flush with the bottom surface of the hull (1); in the expanded state, the angles between the baffles (2) on the left and right sides of the bottom of the hull (1) and the bottom surface of the hull (1) are right angles, and the angle between the baffle (2) at the tail end of the bottom of the hull (1) and the bottom surface of the hull (1) is an acute angle or a right angle.

2. The retractable ship bottom jet-reducing and blocking plate according to claim 1, characterized in that: The telescopic assembly comprises a telescopic pump (4) fixedly mounted on a stepped mounting groove (12), a telescopic rod (5) fixedly connected to the movable end of the telescopic pump (4), a guide plate (8) arranged parallel to the telescopic rod (5) and located on both sides of the telescopic rod (5), a guide groove provided on the inner side of the guide plate (8), a connecting rod (6) fixedly connected to the front end of the telescopic rod (5), and a slider (7) fixedly connected to both ends of the connecting rod (6) and movable back and forth along the guide groove, wherein the connecting rod (6) is rotatably connected to the pull rod (3).

3. The retractable ship bottom jet-reducing and blocking plate according to claim 2, characterized in that: The telescopic assembly further comprises an air pump (9) fixedly mounted inside the hull (1), an air pipe (10) connected to the output port of the air pump (9), and a control switch (11) connected to the air pump (9) via a cable. The end of the air pipe (10) away from the air pump (9) passes through the hull (1) and is connected to the telescopic pump (4).

4. The retractable ship bottom jet-reducing and blocking plate according to claim 1, characterized in that: The two baffles (2) at the bottom tail end of the hull (1) are spliced ​​together to form a V shape.

5. The retractable ship bottom jet-reducing and blocking plate according to claim 1, characterized in that: The baffles (2) located on both sides of the bottom of the hull (1) are linear.

6. The retractable ship bottom jet-reducing and blocking plate according to claim 1, characterized in that: One side of the baffle (2) is provided with multiple groups of pull rods (3) and telescopic components matched with the pull rods (3), and the multiple groups of pull rods (3) are arranged at equal intervals.

7. The retractable ship bottom jet-reducing and blocking plate according to claim 1, characterized in that: The height of the baffle (2) is δ, and the calculation formula of δ is as follows: Where x is the length from the bow to the midship, and Rex is the maximum Reynolds number at the midship position when the ship is sailing.

8. The retractable ship bottom jet-reducing and blocking plate according to claim 1, characterized in that: An elastic sealing strip for increasing sealing performance is installed on the top of the baffle (2).

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