Law enforcement yacht retracting and releasing device and retracting and releasing method thereof

Abstract

The invention discloses a law enforcement yacht collecting and releasing device, belongs to the technical field of ships, and solves the problem that an existing yacht collecting and releasing device is unstable in the collecting and releasing process. The ship stern door storage device comprises a stern door and a storage cavity and further comprises a control system, the stern door is hinged to the tail, at one end of the storage cavity, of a ship stern cabin, first hydraulic cylinders are arranged between the two sides of the stern door and the ship stern cabin, and a winch is installed at the end, away from the stern door, of the ship stern cabin; a plurality of bottom supporting rollers, first side face supporting rollers and second side face supporting rollers are rotationally mounted on the bottom face of the storage cavity and the top face of the tail door correspondingly, and the two first side face supporting rollers are arranged on the two sides of each bottom supporting roller correspondingly; a second side face supporting roller is arranged on the side, away from the bottom supporting roller, of each first side face supporting roller. According to the folding and unfolding device, the speed boat can be stably folded and unfolded in the stern compartment of the ship, and the speed boat is effectively protected. The invention further discloses a law enforcement yacht collecting and releasing method, and the yacht can be collected and released rapidly and safely.

Description

Technical Field

[0001] The present invention relates to the technical field of ships, and more specifically, to a law enforcement speedboat retrieval device and a retrieval method thereof. Background Art

[0002] The shipboard speedboat is one of the important equipment of the official law enforcement ship. Its main function is to carry out official duties and water rescue tasks in the law enforcement sea area. Whether the speedboat can safely and quickly achieve the retrieval and release tasks is related to the realization of the speedboat's functions and the successful completion of the tasks. The tail slide type speedboat retrieval and release system is a new type of shipboard speedboat retrieval and release system in China. Compared with the traditional speedboat retrieval and release method, it has obvious advantages such as fast and safe retrieval and release, and can be operated in higher sea conditions. However, the existing tail slide type speedboat retrieval and release system generally uses a single roller structure in the slideway to support the bottom of the speedboat so that it can slide up and down into the ship's stern cabin. Since the speedboat is towed by a towing rope, during the traction and retrieval process, the single roller support method is easy to cause the speedboat to shake and collide with the ship's stern cabin, which is easy to damage the speedboat, or even cause the speedboat to get stuck and unable to move.

[0003] Therefore, it is urgent to develop and design a law enforcement speedboat retrieval device and a retrieval method thereof to solve the above-mentioned problems. Summary of the invention

[0004] The technical problem to be solved by the present invention is to address the above-mentioned deficiencies in the prior art. One purpose of the present invention is to provide a law enforcement speedboat retrieval and deployment device so that the speedboat can be stably retrieved and deployed in the stern cabin of a ship, thereby effectively protecting the speedboat.

[0005] The second purpose of the present invention is to provide a method for folding and launching a law enforcement speedboat, so as to realize fast and safe folding and launching of the speedboat.

[0006] In order to achieve the above-mentioned first objective, the present invention provides a law enforcement speedboat storage and launching device, comprising a tail gate and a storage chamber for placing the speedboat, and also comprising a control system, wherein the storage chamber is opened in the stern cabin of a ship, and the tail gate is hingedly installed at the stern of the ship's stern cabin at one end of the storage chamber, and a first hydraulic cylinder that can drive the tail gate to swing to block the inlet and outlet of the storage chamber is provided between both sides of the tail gate and the stern cabin of the ship, and a winch is installed at the end of the stern cabin of the ship away from the tail gate, and the bottom of the storage chamber is an inclined surface extending along its axial direction, and the bottom surface of the storage chamber and the top surface of the tail gate are rotatably installed with a plurality of bottom support rollers, a first side support roller and a second side support roller, and each of the bottom support rollers Two first side support rollers are arranged on both sides, and a second side support roller is arranged on the side of each of the first side support rollers away from the bottom support roller. A first position sensor is also provided at the end of the storage chamber away from the tail gate, a second position sensor is provided on the ship's tail cabin on the side of the storage chamber inlet and outlet, and a third position sensor is provided on the ship's tail cabin below the tail gate. The first position sensor, the second position sensor, the third position sensor, the first hydraulic cylinder, and the winch are all electrically connected to the control system; a fixing component for fixing the speedboat is provided on the ship's tail cabin above the storage chamber, and a reinforcement component for reinforcing the speedboat is provided at the end of the ship's tail cabin away from the tail gate.

[0007] As a further improvement, the fixing assembly includes a hanging rope rod, a binding rope and a pull rope seat. There are two hanging rope rods, which are symmetrically fixed on the top of the ship's stern cabin on both sides of the storage cavity. There are two pull rope seats, which are symmetrically fixed on both sides of the bottom of the storage cavity near one end of the stern door. There are multiple binding ropes, and the multiple binding ropes are respectively bound and connected to the hanging rope rods and the pull rope seats.

[0008] Furthermore, the reinforcement assembly includes a hook and a second hydraulic cylinder, one end of the hook is hingedly connected to the stern cabin of the ship, the other end of the hook is provided with a fourth position sensor, and a fifth position sensor is also provided on the stern cabin of the ship below the hook, the two ends of the second hydraulic cylinder are respectively hingedly connected to the stern cabin of the ship and the bottom of the hook, and the fourth position sensor, the fifth position sensor and the second hydraulic cylinder are all electrically connected to the control system.

[0009] Furthermore, the reinforcement assembly also includes a fixing rope, one end of which is fixedly connected to the stern cabin of the ship.

[0010] Furthermore, a plurality of vertically arranged side guide rollers are rotatably mounted on the inner wall of the storage cavity.

[0011] Furthermore, the tailgate is a mesh plate with a hollow structure, and a plurality of anti-slip stickers are provided on the top of the tailgate.

[0012] Furthermore, warning lights are provided on both sides of one end of the tailgate away from the storage cavity, and a guide roller is rotatably mounted on one side of the warning light.

[0013] Furthermore, the angle between the bottom surface of the storage cavity and the horizontal plane is 10° to 15°.

[0014] Furthermore, a locking device for locking the tail door is provided on the ship's tail cabin on both sides of the storage cavity inlet and outlet.

[0015] In order to achieve the above-mentioned second objective, the present invention provides a method for launching and retracting a law enforcement speedboat, characterized in that it includes the above-mentioned law enforcement speedboat launching and retracting device, and the method includes the following steps:

[0016] S1. Speedboat Retrieval:

[0017] S1.1: Hang the corresponding wire rope of the winch on the bow hook of the speedboat;

[0018] S1.2: Start the control system, the control system controls the winch to reel in the wire rope, and pulls the speedboat along the stern door toward the storage chamber until the speedboat contacts the first position sensor, and the control system controls the winch to stop;

[0019] S1.3: The control system controls the second hydraulic cylinder to extend, pushing the hook corresponding to the reinforcement assembly to swing toward the side of the speedboat until the hook contacts the fourth position sensor, and the control system controls the second hydraulic cylinder to stop;

[0020] S1.4: The control system controls the first hydraulic cylinder to retract, pulling the stern door to swing toward the side of the ship's stern cabin until the stern door contacts the second position sensor, and the control system controls the first hydraulic cylinder to stop;

[0021] S1.5: Use the two ends of the lashing ropes corresponding to the fixing assembly to connect to the two sides of the stern of the speedboat and the rope pull seat respectively, and the other two ends of the lashing ropes are passed around the speedboat and tied to the rope hanging rod;

[0022] S1.6: Lock the tailgate with the locking device, turn off the control system, and complete the speedboat retrieval;

[0023] S2. Launching of speedboat:

[0024] S2.1: Release the locking device corresponding to the tail;

[0025] S2.2: Loosen all the lashing ropes corresponding to the fixing components to release the speedboat;

[0026] S2.3: Start the control system, the control system controls the first hydraulic cylinder to extend, and pushes the tail gate to swing to the side away from the tail cabin of the ship until the tail gate contacts the third position sensor, and the control system controls the first hydraulic cylinder to stop;

[0027] S2.4: The control system controls the second hydraulic cylinder to retract, pushing the hook corresponding to the reinforcement assembly to swing toward the side of the ship's stern cabin until the hook contacts the fifth position sensor, and the control system controls the second hydraulic cylinder to stop;

[0028] S2.5: The control system controls the winch to loosen the wire rope, and the speedboat moves along the storage chamber toward the tail gate under the action of its own gravity until the speedboat falls into the water and leaves the tail gate, and the control system controls the winch to stop;

[0029] S2.6: Loosen the wire rope corresponding to the winch, turn off the control system, and complete the lowering of the speedboat.

[0030] Beneficial Effects

[0031] Compared with the prior art, the present invention has the following advantages:

[0032] 1. The law enforcement speedboat folding and launching device of the present invention adopts a bottom support roller, a first side support roller, and a second side support roller to support the speedboat at three points in the circumferential direction, so that the force on the speedboat is more uniform and the support is more stable, so that the speedboat can be smoothly folded and launched in the stern cabin of the ship, effectively protecting the speedboat.

[0033] 2. The law enforcement speedboat retrieval and release device of the present invention uses a reinforcement component to hook the speedboat after the speedboat is retracted into the storage chamber, and then uses a fixing component to fix the speedboat, which can improve the operational safety of the staff when fixing the speedboat, and can also further improve the stability of the speedboat when it is stored to avoid the problem of loosening. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a schematic diagram of the main structure of the present invention;

[0035] Figure 2 This is a schematic diagram of the main structure of the present invention when the speedboat is retracted;

[0036] Figure 3 for Figure 2 A schematic diagram of the structure enlargement at the center A;

[0037] Figure 4 It is a schematic diagram of the top view of the structure of the present invention;

[0038] Figure 5 It is an enlarged schematic diagram of the top view structure of the tailgate in the present invention;

[0039] Figure 6 It is an enlarged schematic diagram of the top view of the tail cabin of the ship when the speedboat is retracted according to the present invention;

[0040] Figure 7 The figure is a side view structural schematic diagram of the present invention when the speedboat is retracted.

[0041] Wherein: 1-tail door, 2-speedboat, 3-storage chamber, 4-control system, 5-ship stern cabin, 6-first hydraulic cylinder, 7-winch, 8-bottom support roller, 9-first side support roller, 10-second side support roller, 11-first position sensor, 12-second position sensor, 13-third position sensor, 14-hanging rope rod, 15-binding rope, 16-rope seat, 17-hook, 18-second hydraulic cylinder, 19-fourth position sensor, 20-fifth position sensor, 21-fixed rope, 22-side guide roller, 23-anti-slip sticker, 24-warning light, 25-guide roller, 26-locking device, 27-wire rope, 28-locking nut, 29-screw. DETAILED DESCRIPTION

[0042] The present invention will be further described below with reference to the specific embodiments in the accompanying drawings.

[0043] See also Figure 1-7 The present invention provides a law enforcement speedboat storage and launching device, comprising a stern door 1 and a storage chamber 3 for placing a speedboat 2, and also comprising a control system 4, the control system 4 being installed on the top of the ship's stern cabin 5 and being used to control the operation of each actuator, the storage chamber 3 being opened in the ship's stern cabin 5 and being a cavity extending to the stern end face of the ship's stern cabin 5, the stern door 1 being hingedly installed at the stern of the ship's stern cabin 5 at one end of the storage chamber 3, a first hydraulic cylinder 6 which can drive the stern door 1 to swing to block the inlet and outlet of the storage chamber 3 is provided between both sides of the stern door 1 and the ship's stern cabin 5, the two ends of the first hydraulic cylinder 6 are respectively hingedly connected to the ship's stern cabin 5 and the stern door 1, a winch 7 is installed at the end of the ship's stern cabin 5 away from the stern door 1, the bottom of the storage chamber 3 is an inclined surface extending along its axial direction, which is convenient for retrieving the speedboat 2 and can automatically slide down under the action of gravity to realize the lowering of the speedboat 2, a plurality of bottom support rollers 8, a first side support roller 9 and a second side support roller 10 are rotatably installed on the bottom surface of the storage chamber 3 and the top surface of the stern door 1, wherein, Two first side support rollers 9 are arranged on both sides of each bottom support roller 8, and a second side support roller 10 is arranged on the side of each first side support roller 9 away from the bottom support roller 8 to achieve multi-point support of the speedboat 2. A first position sensor 11 is also provided at the end of the storage chamber 3 away from the tail gate 1, which is used to detect whether the speedboat 2 is retracted in place so that the reinforcement component can reinforce it. A second position sensor 12 is provided on the ship's tail cabin 5 on the inlet and outlet side of the storage chamber 3 to detect whether the tail gate 1 is retracted in place. A third position sensor 13 is provided on the ship's tail cabin 5 below the tail gate 1 to detect whether the tail gate 1 is lowered in place to ensure that the tail gate 1 swings to a position flush with the bottom surface of the storage chamber 3. The first position sensor 11, the second position sensor 12, and the third position sensor 13 are all proximity switches, and the first position sensor 11, the second position sensor 12, the third position sensor 13, the first hydraulic cylinder 6, and the winch 7 are all electrically connected to the control system 4.

[0044] The law enforcement speedboat folding and launching device of the present invention adopts a bottom support roller 8, a first side support roller 9, and a second side support roller 10 to support the speedboat at three points in the circumferential direction, so that the force on the speedboat is more uniform and the support is more stable, so that the speedboat can be smoothly folded and launched in the stern cabin of the ship, effectively protecting the speedboat.

[0045] A fixing assembly for fixing the speedboat 2 is provided on the ship's stern compartment 5 above the storage chamber 3. Specifically, the fixing assembly includes a hanging rope rod 14, a lashing rope 15 and a pull rope seat 16, wherein there are two hanging rope rods 14, which are symmetrically fixed on the top of the ship's stern compartment 5 on both sides of the storage chamber 3, there are two pull rope seats 16, which are symmetrically fixed on both sides of the bottom of the storage chamber 3 near one end of the stern door 1, and there are multiple lashing ropes 15, which are respectively tied and connected with the hanging rope rods 15 and the pull rope seats 16. A reinforcement assembly for reinforcing the speedboat 2 is provided at one end of the ship's stern compartment 5 away from the stern door 1. Specifically, the reinforcement component includes a hook 17 and a second hydraulic cylinder 18, wherein one end of the hook 17 is hingedly connected to the stern cabin 5 of the ship, and the other end of the hook 17 is provided with a fourth position sensor 19 for detecting whether the hook 17 is hooked on the speedboat 2. A fifth position sensor 20 is also provided on the stern cabin 5 of the ship below the hook 17 for detecting whether the hook 17 is detached from the speedboat 2 and reset. The fourth position sensor 19 and the fifth position sensor 20 are both proximity switches. The two ends of the second hydraulic cylinder 18 are respectively hingedly connected to the stern cabin 5 of the ship and the bottom of the hook 17, and the fourth position sensor 19, the fifth position sensor 20 and the second hydraulic cylinder 18 are all electrically connected to the control system 4.

[0046] The law enforcement speedboat retrieval and release device of the present invention uses a reinforcement component to hook the speedboat after the speedboat is retracted into the storage chamber, and then uses a fixing component to fix the speedboat, which can improve the operational safety of the staff when fixing the speedboat, and can also further improve the stability of the speedboat when it is stored to avoid the problem of loosening.

[0047] Preferably, the reinforcement assembly further includes a fixing rope 21, one end of which is fixedly connected to the ship's stern cabin 5. When the speedboat 2 is stored for a long time, the fixing rope 21 can be connected to the bow of the speedboat 2 to form a mechanical fixing method. At this time, the winch 7 and the hook 17 can be loosened, and the speedboat 2 can be pulled by the fixing rope 21 to avoid damage to the hydraulic system corresponding to the winch 7 and the hook 17.

[0048] Preferably, a plurality of vertically arranged side guide rollers 22 are rotatably mounted on the inner wall of the storage chamber 3, which guide both sides of the speedboat 2 when the speedboat 2 enters the storage chamber 3, further improving the stability of the speedboat 2 during folding and unfolding, and avoiding damage to the speedboat 2.

[0049] Preferably, the tailgate 1 is a mesh plate with a hollow structure, which can reduce resistance when the tailgate 1 is lowered into or retrieved from the water, making it easier to lower and retrieve the tailgate 1. A plurality of anti-slip stickers 23 are also provided on the top of the tailgate 1. When a worker stands on the anti-slip stickers 23 to hook or unhook the wire rope 27 of the winch 7, the anti-slip stickers 23 can improve safety.

[0050] Preferably, warning lights 24 are provided on both sides of the end of the tailgate 1 away from the storage chamber 3 to remind the staff that the position of the slide is between the two warning lights 24, which helps the speedboat 2 to align with the slide and prevents damage to the speedboat 2. A guide roller 25 is also rotatably installed on one side of the warning light 24 to guide the speedboat 2 to align with the slide.

[0051] Preferably, the angle between the bottom surface of the storage cavity 3 and the horizontal plane is 10° to 15°, which can ensure the smooth folding and unfolding of the speedboat 2. At the same time, the force on the speedboat 2 in the storage cavity 3 is more uniform, further improving the storage stability of the speedboat 2.

[0052] Preferably, a locking device 26 for locking the tail gate 1 is also provided on the ship's stern compartment 5 on both sides of the inlet and outlet of the storage chamber 3. The provision of the locking device 26 can reduce the load influence of the tail gate 1 on the first hydraulic cylinder 6, and can also improve the stability of the retraction of the tail gate 1. Specifically, the locking device 26 includes a screw rod 29 and a locking nut 28. The screw rod 29 is hingedly mounted on the back of the tail gate 1, and the locking nut 28 is threadedly connected to the screw rod 29 at one end away from the tail gate 1. When the tail gate 1 is swung back, the locking nut 28 is tightened, and the connection between the tail gate 1 and the ship's stern compartment 5 is squeezed by the locking nut 28 to lock the tail gate 1. The tail gate 1 can be loosened by loosening the locking nut 28.

[0053] A method for launching and retracting a law enforcement speedboat, comprising the above-mentioned law enforcement speedboat launching and retracting device, the method comprising the following steps:

[0054] S1. Speedboat Retrieval:

[0055] S1.1: Hang the steel wire rope 27 corresponding to the winch 7 on the bow hook of the speedboat 2;

[0056] S1.2: Start the control system 4, the control system 4 controls the winch 7 to reel in the wire rope 27, and pulls the speedboat 2 along the tailgate 1 to move toward the storage chamber 3, until the speedboat 2 contacts the first position sensor 11, the control system 4 controls the winch 7 to stop, and the speedboat 2 is retracted into the storage chamber 3;

[0057] S1.3: The control system 4 controls the second hydraulic cylinder 18 to extend, pushing the hook 17 corresponding to the reinforcement assembly to swing toward the side of the speedboat 2 until the hook 17 contacts the fourth position sensor 19, and the control system 4 controls the second hydraulic cylinder 18 to stop, thereby reinforcing the speedboat 2 and preventing the speedboat from loosening and causing safety problems;

[0058] S1.4: the control system 4 controls the first hydraulic cylinder 6 to retract, pulling the tail gate 1 to swing toward the side of the ship's tail cabin 5 until the tail gate 1 contacts the second position sensor 12, and the control system 4 controls the first hydraulic cylinder 6 to stop, so as to retract the tail gate 1, and at the same time, it can also further prevent the speedboat 2 from falling out;

[0059] S1.5: The two ends of two of the lashing ropes 15 corresponding to the fixing assembly are respectively connected to the two sides of the stern of the speedboat 2 and the pull rope seat 16, and the two ends of the remaining lashing ropes 15 are passed around the speedboat 2 and tied to the hanging rope rod 14 to fix the speedboat 2 and prevent the speedboat 2 from loosening;

[0060] S1.6: Lock the tailgate 1 with the locking device 26, turn off the control system 4, and complete the speedboat recovery work;

[0061] S2. Launching of speedboat:

[0062] S2.1: Release the locking device 26 corresponding to the tailgate 1;

[0063] S2.2: Loosen all the lashing ropes 15 corresponding to the fixing components to release the speedboat 2;

[0064] S2.3: Start the control system 4, the control system 4 controls the first hydraulic cylinder 6 to extend, and pushes the tail gate 1 to swing to the side away from the ship's tail cabin 5, until the tail gate 1 contacts the third position sensor 13, and the control system 4 controls the first hydraulic cylinder 6 to stop, so that the tail gate 1 swings to a state flush with the bottom surface of the storage chamber 3, so as to facilitate the speedboat 2 to slide down;

[0065] S2.4: the control system 4 controls the second hydraulic cylinder 18 to contract, pushing the hook 17 corresponding to the reinforcement assembly to swing toward the side of the ship's stern cabin 5 until the hook 17 contacts the fifth position sensor 20, and the control system 4 controls the second hydraulic cylinder 18 to stop, thereby releasing the constraint of the reinforcement assembly on the speedboat;

[0066] S2.5: The control system 4 controls the winch 7 to loosen the steel wire rope 27, and the speedboat 2 moves along the storage chamber 3 toward the tailgate 1 under the action of its own gravity until the speedboat 2 falls into the water and leaves the tailgate 1. The control system 4 controls the winch 7 to stop, and the winch 7 is used to pull the speedboat 2 down to prevent the speedboat 2 from falling quickly, thereby further improving the stability of the speedboat 2 when it is lowered;

[0067] S2.6: Release the steel wire rope 27 corresponding to the winch 7, and hang the steel wire rope 27 on the side of the tailgate 1 for easy access when retrieving the speedboat 2, and close the control system 4 to complete the lowering of the speedboat 2.

[0068] The law enforcement speedboat folding and launching method of the present invention can realize fast and safe folding and launching of the speedboat.

[0069] The above are only preferred embodiments of the present invention. It should be pointed out that for those skilled in the art, several modifications and improvements can be made without departing from the structure of the present invention, which will not affect the effect of the implementation of the present invention and the practicality of the patent.

Claims

1. A law enforcement speedboat retracting and launching device, comprising a tailgate (1) and a storage chamber (3) for placing a speedboat (2), characterized in that: The invention also comprises a control system (4), wherein the storage chamber (3) is provided in a ship's stern cabin (5), the stern door (1) is hingedly mounted at the stern of the ship's stern cabin (5) at one end of the storage chamber (3), and first hydraulic cylinders (6) are arranged between the two sides of the stern door (1) and the ship's stern cabin (5) to drive the stern door (1) to swing so as to block the inlet and outlet of the storage chamber (3). A winch (7) is installed at one end of the ship's stern cabin (5) away from the stern door (1). The bottom of the storage chamber (3) is an inclined surface extending along its axial direction. The bottom surface of the storage chamber (3) and the top surface of the stern door (1) are rotatably mounted with a plurality of bottom support rollers (8), first side support rollers (9) and second side support rollers (10), and two first side support rollers (9) are arranged on both sides of each of the bottom support rollers (8). A second side support roller (10) is arranged on the side of the support roller (9) away from the bottom support roller (8); a first position sensor (11) is also arranged on the end of the storage chamber (3) away from the tail gate (1); a second position sensor (12) is arranged on the ship's tail cabin (5) on the inlet and outlet side of the storage chamber (3); a third position sensor (13) is arranged on the ship's tail cabin (5) below the tail gate (1); the first position sensor (11), the second position sensor (12), the third position sensor (13), the first hydraulic cylinder (6), and the winch (7) are all electrically connected to the control system (4); a fixing component for fixing the speedboat (2) is arranged on the ship's tail cabin (5) above the storage chamber (3); and a reinforcement component for reinforcing the speedboat (2) is arranged on the end of the ship's tail cabin (5) away from the tail gate (1).

2. The law enforcement speedboat retracting and launching device according to claim 1, characterized in that: The fixing assembly comprises a rope hanging rod (14), a binding rope (15) and a rope pulling seat (16); there are two rope hanging rods (14) in total, which are symmetrically fixed on the top of the ship's stern cabin (5) on both sides of the storage cavity (3); there are two rope pulling seats (16) in total, which are symmetrically fixed on both sides of the bottom of the storage cavity (3) near one end of the stern door (1); there are multiple binding ropes (15) in total, and the multiple binding ropes (15) are respectively bound and connected to the rope hanging rods (15) and the rope pulling seats (16).

3. The law enforcement speedboat retracting and launching device according to claim 1, characterized in that: The reinforcement component comprises a hook (17) and a second hydraulic cylinder (18), one end of the hook (17) is hingedly connected to the ship's stern cabin (5), the other end of the hook (17) is provided with a fourth position sensor (19), and a fifth position sensor (20) is also provided on the ship's stern cabin (5) below the hook (17), the two ends of the second hydraulic cylinder (18) are respectively hingedly connected to the ship's stern cabin (5) and the bottom of the hook (17), and the fourth position sensor (19), the fifth position sensor (20) and the second hydraulic cylinder (18) are all electrically connected to the control system (4).

4. The law enforcement speedboat retracting and launching device according to claim 3, characterized in that: The reinforcement assembly further comprises a fixing rope (21), one end of which is fixedly connected to the stern cabin (5) of the ship.

5. The law enforcement speedboat retracting and launching device according to claim 1, characterized in that: The inner wall of the storage chamber (3) is also rotatably mounted with a plurality of vertically arranged side guide rollers (22).

6. The law enforcement speedboat retracting and launching device according to claim 1, characterized in that: The tailgate (1) is a mesh plate with a hollow structure, and a plurality of anti-slip stickers (23) are also provided on the top of the tailgate (1).

7. The law enforcement speedboat retracting and launching device according to claim 1, characterized in that: Warning lights (24) are provided on both sides of one end of the tailgate (1) away from the storage chamber (3), and a guide roller (25) is rotatably mounted on one side of the warning light (24).

8. The law enforcement speedboat retracting and launching device according to claim 1, characterized in that: The angle between the bottom surface of the storage cavity (3) and the horizontal plane is 10° to 15°.

9. A law enforcement speedboat retracting and launching device according to any one of claims 1 to 8, characterized in that: The ship's stern compartment (5) on both sides of the inlet and outlet of the storage chamber (3) is also provided with a locking device (26) for locking the stern door (1).

10. A method for launching and retracting a law enforcement speedboat, characterized in that: The method comprises the law enforcement speedboat launching and retracting device as described in claim 9, and the method comprises the following steps: S1. Speedboat Retrieval: S1.1: Hang the steel wire rope (27) corresponding to the winch (7) on the bow hook of the speedboat (2); S1.2: starting the control system (4), the control system (4) controlling the winch (7) to reel in the steel wire rope (27), pulling the speedboat (2) along the tailgate (1) toward the storage chamber (3), until the speedboat (2) contacts the first position sensor (11), and the control system (4) controlling the winch (7) to stop; S1.3: the control system (4) controls the second hydraulic cylinder (18) to extend, pushing the hook (17) corresponding to the reinforcement assembly to swing toward one side of the speedboat (2), until the hook (17) contacts the fourth position sensor (19), and the control system (4) controls the second hydraulic cylinder (18) to stop; S1.4: the control system (4) controls the first hydraulic cylinder (6) to retract, pulling the stern door (1) to swing toward the side of the ship's stern cabin (5) until the stern door (1) contacts the second position sensor (12), and the control system (4) controls the first hydraulic cylinder (6) to stop; S1.5: The two ends of two of the lashing ropes (15) corresponding to the fixing assembly are respectively connected to the two sides of the stern of the speedboat (2) and the pull rope seat (16), and the two ends of the remaining lashing ropes (15) are passed around the speedboat (2) and tied to the hanging rope rod (14); S1.6: Lock the tailgate (1) with the locking device (26), turn off the control system (4), and complete the speedboat retraction operation; S2. Launching of speedboat: S2.1: Release the locking device (26) corresponding to the tailgate (1); S2.2: Loosen all the lashing ropes (15) corresponding to the fixing components to release the speedboat (2); S2.3: starting the control system (4), the control system (4) controls the first hydraulic cylinder (6) to extend, and pushes the stern door (1) to swing to the side away from the stern cabin (5) of the ship, until the stern door (1) contacts the third position sensor (13), and the control system (4) controls the first hydraulic cylinder (6) to stop; S2.4: the control system (4) controls the second hydraulic cylinder (18) to retract, pushing the hook (17) corresponding to the reinforcement assembly to swing toward the side of the ship's stern cabin (5) until the hook (17) contacts the fifth position sensor (20), and the control system (4) controls the second hydraulic cylinder (18) to stop; S2.5: the control system (4) controls the winch (7) to loosen the steel wire rope (27), and the speedboat (2) moves along the storage chamber (3) toward the tail gate (1) under the action of its own weight until the speedboat (2) falls into the water and leaves the tail gate (1), and the control system (4) controls the winch (7) to stop; S2.6: Release the steel wire rope (27) corresponding to the winch (7), turn off the control system (4), and complete the lowering of the speedboat (2).

Images