Bidirectional synchronous release device

Abstract

The invention discloses a bidirectional synchronous releasing device. The device comprises a buoy unit, a load rejection unit, a driver, a sliding rail, an upper sliding block, a lower sliding block, an upper shell and a lower shell. The buoy unit comprises a pressing plate, a buoy, a nylon yarn rope, a long compression spring, a long sliding rod and a buckle. The load rejection unit comprises a mounting seat, a load rejection block, a short sliding rod, a short compression spring and a steel ball; the buoy unit is arranged in the upper shell and connected with the sliding rail through an upper sliding block. The load rejection unit is arranged in the lower shell and connected with the sliding rail through a lower sliding block. The sliding rail is connected with the driver; the driver drives the upper sliding block and the lower sliding block on the sliding rail to move, and then the synchronous action of upward releasing of a buoy of the buoy unit and downward releasing of a load rejection block of the load rejection unit is achieved. According to the device, mechanical limiting and spring force storage design is adopted, continuous power supply or initiating explosive devices are not needed, environmental interference is avoided, and safety is high; the structure is simple.

Description

Technical Field

[0001] This invention relates to the field of underwater vehicle safety technology, and more specifically, to a two-way synchronous release device. Background Technology

[0002] An underwater vehicle (UV) is a new type of marine monitoring equipment that is self-powered, autonomously propelled, and autonomously controlled, possessing underwater maneuvering and sensing capabilities. It can operate independently of its mother ship and has broad application prospects in both military and civilian marine development. During missions, the complex and ever-changing underwater environment presents significant uncertainties and dangers. If a malfunction occurs or external factors cause the UV to lose control, it risks sinking or being lost, resulting in substantial losses. A jettisoning device is needed to remove heavy loads, reducing the vehicle's weight to less than its buoyancy, allowing it to surface. If the UV sinks and the jettisoning device is unable to function, a buoy is simultaneously released to accurately indicate the UV's underwater position, greatly reducing the risk of loss.

[0003] Currently, there are many types of release devices used in underwater robots both domestically and internationally. These can be broadly categorized into explosive bolt type, electromagnetic adsorption type, and fusion type. Explosive bolt type release devices use pyrotechnics, have high requirements for transportation, installation, and use, are costly, and have a large explosive impact. Electromagnetic adsorption type release devices require continuous power supply during operation, resulting in high energy consumption. Fusion type release devices require a large current to melt the metal wire, and their control principle is relatively complex. Summary of the Invention

[0004] This invention provides a bidirectional synchronous release device to solve the problems of low safety, complex structure, high cost, and low system stability of existing release devices.

[0005] To achieve the above objectives, the present invention provides a bidirectional synchronous release device, comprising: a buoy unit, a release unit, a driver, a slide rail, an upper slider, a lower slider, an upper housing, and a lower housing; the buoy unit is disposed within the upper housing and connected to the slide rail via the upper slider; the release unit is disposed within the lower housing and connected to the slide rail via the lower slider; the slide rail is connected to the driver; the driver drives the upper and lower sliders on the slide rail to move, thereby achieving synchronous action of the buoy unit releasing upward and the release unit releasing downward; the buoy unit comprises: a pressure plate, a buoy, a silk rope, a long compression spring, a long slide rod, and a buckle; the buoy is disposed within the upper housing and pressed by the pressure plate; one end of the silk rope is wound around the buoy, and the other end is fixedly connected to the buckle within the upper housing; a through hole is provided at the center of the buoy for the long... A sliding rod is inserted; one end of the long sliding rod limits the pressure plate, and the other end passes through the upper housing and is fixed inside the upper slider; a long compression spring is located around the long sliding rod, with one end abutting the buoy and the other end abutting the bottom surface of the upper housing; the throwing unit includes: a mounting base, a throwing block, a short sliding rod, a short compression spring, and a steel ball; the mounting base is inserted into the lower housing and fixedly connected to the upper surface of the lower housing; the throwing block is located inside the lower housing; a through hole is provided on the mounting base for the steel ball to pass through; the steel ball abuts against the throwing block; a through hole is provided in the center of the throwing block for the short sliding rod to pass through; one end of the short sliding rod passes through the mounting base and connects to the lower slider, and the other end abuts against the steel ball; the short compression spring is located around the short sliding rod, with one end abutting against the lower slider and the other end abutting against the mounting base.

[0006] Optionally, the slide rail includes a first connecting block and a second connecting block fixedly connected; the included angle between the upper surface of the first connecting block and the upper surface of the second connecting block is an obtuse angle; the second connecting block is connected to the driver; a through upper sliding groove is provided on the upper surface of the first connecting block and the second connecting block for inserting the upper sliding block into and sliding within the upper sliding groove; a through lower sliding groove is provided on the lower surface of the first connecting block and the second connecting block for inserting the lower sliding block into and sliding within the lower sliding groove.

[0007] Optionally, the actuator is an electric linear actuator or a hydraulic linear actuator, used to drive the slide rail to move toward the actuator, thereby causing the upper slider to slide along the upper slider groove from the second connecting block to the first connecting block, the long slide rod to move upward, releasing the restriction on the pressure plate, so that the pressure plate rotates to release the pressure on the buoy; and used to drive the slide rail to move toward the actuator, thereby causing the lower slider to slide along the lower slider groove from the second connecting block to the first connecting block, the short slide rod to move upward, releasing the restriction of the steel ball on the short slide rod and the throwing block.

[0008] Optionally, it also includes: a mounting plate and a clamp; the driver is installed inside the clamp; one end of the mounting plate is fixedly connected to the upper surface of the lower housing; the other end of the mounting plate is fixedly connected to the clamp.

[0009] Optionally, the pressure plate is connected to the upper housing via a long pin; and the pressure plate can rotate around the long pin.

[0010] Optionally, the buoy unit further includes: a buoy washer; the buoy washer has a U-shaped structure with its center passing through the long sliding rod; one end of the buoy washer contacts the buoy, and the other end limits the long compression spring.

[0011] Optionally, the mounting base includes a flange and a hollow cylinder that are fixedly connected; the inner diameter of the flange is smaller than the inner diameter of the hollow cylinder; the height of the flange is smaller than the height of the hollow cylinder; the flange is located outside the lower housing and is fixedly connected to the upper surface of the lower housing; the hollow cylinder extends into the lower housing; the hollow cylinder is provided with a through hole for the steel ball to pass through.

[0012] Optionally, the buoy is a cylinder with a density less than that of water.

[0013] Optionally, the slide rail and the driver are fixedly connected by a locating pin.

[0014] Optionally, the mounting plate is fixedly connected to the lower housing by connecting screws; the mounting plate is fixedly connected to the clamp by connecting screws.

[0015] The beneficial effects of this invention are: This invention provides a bidirectional synchronous release device. By integrating a buoy unit and a ballast jettisoning unit, and utilizing a linkage mechanism of a driver, slide rail, upper slider, and lower slider, the device achieves simultaneous ballast jettisoning and buoy release when an underwater vehicle becomes uncontrollable or malfunctions. The device features a mechanical limit switch and spring-loaded design, eliminating the need for continuous power supply or pyrotechnics, avoiding environmental interference, and ensuring high safety. The buoy unit is integrated inside the upper hull, and the ballast jettisoning unit is integrated inside the lower hull, occupying minimal space and adaptable to various underwater vehicles. The use of standard parts (such as steel balls and pins) and easily machinable aluminum components reduces manufacturing costs. The modular design facilitates disassembly and replacement of components, reducing maintenance complexity. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of a bidirectional synchronous release device provided in an embodiment of the present invention; Figure 2 This is a schematic diagram of the structure of the buoy unit provided in an embodiment of the present invention; Figure 3 This is a schematic diagram of the structure of the load-throwing unit provided in an embodiment of the present invention; Figure 4 This is a front view of the slide rail provided in an embodiment of the present invention; Figure 5 This is a front view of the upper or lower slider provided in an embodiment of the present invention; Figure 6 This is a top view of the pressure plate provided in an embodiment of the present invention; Figure 7 This is a front view of the buoy pad provided in an embodiment of the present invention; Figure 8 This is a front view of the mounting base provided in an embodiment of the present invention; Figure 9 This is a side view of the clamp provided in an embodiment of the present invention.

[0017] Symbol explanation: Buoy unit-1, ballast jetting unit-2, driver-3, slide rail-4, upper slider-5, lower slider-6, upper housing-7, lower housing-8, mounting plate-9, clamp-10, positioning pin-11, pressure plate-12, buoy-13, silk rope-14, long compression spring-15, long slide rod-16, buckle-17, buoy washer-18, long pin-19, mounting base-20, ballast jetting block-21, short slide rod-22, short compression spring-23, steel ball-24. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this invention, and not all of them. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0019] Figure 1 This is a schematic diagram of the structure of a bidirectional synchronous release device provided in an embodiment of the present invention; as shown below. Figure 1 As shown, the device includes: The system comprises a buoy unit 1, a release unit 2, a driver 3, a slide rail 4, an upper slider 5, a lower slider 6, an upper housing 7, and a lower housing 8. The buoy unit 1 is disposed within the upper housing 7 and connected to the slide rail 4 via the upper slider 5. The release unit 2 is disposed within the lower housing 8 and connected to the slide rail 4 via the lower slider 6. The slide rail 4 is connected to the driver 3. The driver 3 drives the upper slider 5 and the lower slider 6 on the slide rail 4 to move, thereby achieving the synchronous action of the buoy unit 1 releasing upward and the release unit 2 releasing downward. The upper housing 7 is generally made of corrosion-resistant, high-strength metal or engineering plastic. Its internal structure is designed to fix the buoy unit 1 and has a dedicated connection interface for installing the upper slider 5. The upper housing 7 provides a stable, sealed internal space, so that the buoy unit 1 is in a restricted state before release, preventing premature activation due to vibration or water flow interference in the underwater environment.

[0020] The lower housing 8 also adopts a corrosion-resistant and pressure-resistant design, and structurally matches the upper housing 7 to form the lower installation space of the overall device. The lower housing 8 has a pre-set position for installing the ejection unit 2, and a dedicated connection interface is reserved for installing the lower slider 6 to ensure that the ejection unit 2 moves in a predetermined direction when released.

[0021] The upper and lower shells are an integral structure, and in this invention, the shape of the integral structure is a rotating body.

[0022] In one optional implementation, Figure 4 This is a front view of the slide rail 4 provided in an embodiment of the present invention; Figure 5 This is a front view of the upper slider 5 or the lower slider 6 provided in the embodiments of the present invention; as shown... Figure 4 and Figure 5 As shown: The slide rail 4 includes a first connecting block and a second connecting block that are fixedly connected; the included angle between the upper surface of the first connecting block and the upper surface of the second connecting block is an obtuse angle; the second connecting block is connected to the driver 3; A through upper slider groove is provided on the upper surface of the first connecting block and the second connecting block, for inserting the upper slider 5 into and sliding it in the upper slider groove; A through-sliding groove is provided on the lower surface of the first connecting block and the second connecting block, for inserting the sliding block 6 into and sliding within the sliding groove.

[0023] Preferably, one end of the upper slider 5 has a threaded hole, and the other end has a boss, which is spherical and is inserted into the upper slider groove and can move within the groove. The lower slider 6 is the same size and shape as the upper slider 5.

[0024] The second connecting block of the slide rail 4 is horizontal, and the first connecting block is bent upward to satisfy the release action of the throwing unit 2 and the buoy unit 1. An upper sliding groove and a lower sliding groove are respectively provided at the central axis of the upper and lower surfaces of the first connecting block and the second connecting block, which can satisfy the limiting sliding of the upper sliding block 5 and the lower sliding block 6.

[0025] In an optional embodiment, the slide rail 4 is fixedly connected to the driver 3 via a positioning pin 11. Furthermore, the second connecting block is fixedly connected to the driver 3 via a positioning pin 11.

[0026] In an optional embodiment, the driver 3 is an electric linear driver 3 or a hydraulic linear driver 3, used to drive the slide rail 4 to move toward the driver 3 (i.e., the slide rail 4 moves to the right), thereby causing the upper slider 5 to slide along the upper slider groove from the second connecting block to the first connecting block; and used to drive the slide rail 4 to move toward the driver 3, thereby causing the lower slider 6 to slide along the lower slider groove from the second connecting block to the first connecting block.

[0027] Figure 2 This is a schematic diagram of the structure of the buoy unit 1 provided in an embodiment of the present invention; as shown... Figure 2 As shown, The buoy unit 1 includes: a pressure plate 12, a buoy 13, a silk rope 14, a long compression spring 15, a long sliding rod 16, and a buckle 17; the buoy 13 is disposed inside the upper housing 7 and is pressed by the pressure plate 12; one end of the silk rope 14 is wrapped around the buoy 13, and the other end is fixedly connected to the buckle 17 inside the upper housing 7; a through hole is provided in the center of the buoy 13 for the long sliding rod 16 to pass through; one end of the long sliding rod 16 limits the pressure plate 12, and the other end passes through the upper housing 7 and is fixed inside the upper slider 5; the long compression spring 15 is disposed around the long sliding rod 16, one end of which abuts against the buoy 13, and the other end abuts against the bottom surface of the upper housing 7; Figure 7 This is a front view of the buoy 13 liner provided in an embodiment of the present invention; as shown Figure 7 As shown, The buoy unit 1 further includes: a buoy washer 18; the buoy washer 18 has a U-shaped structure, with its center passing through the long slide rod 16; one end of the buoy washer 18 contacts the buoy 13, and the other end limits the long compression spring 15.

[0028] Specifically, the buoy 13 is a cylinder with a density less than that of water, and has an annular groove in its radial direction for winding a silk rope 14 around it. When the vehicle loses control during navigation, the buoy 13 is released, and under the action of positive buoyancy, the silk rope 14 unfolds, and the buoy 13 rises to the water surface to accurately indicate the position of the vehicle.

[0029] A through hole is provided at the center of the buoy 13 for the long slide rod 16 to pass through; one end of the long slide rod 16 is threaded and the other end is a flange-shaped cylinder. The threaded end of the long slide rod 16 passes through the upper housing 7 and is fixed inside the upper slide block 5, that is, it is connected to the upper slide block 5 by threads.

[0030] The pressure plate 12 is used to press the buoy 13; Figure 6 This is a top view of the pressure plate 12 provided in an embodiment of the present invention; as shown Figure 6 As shown, one end of the pressure plate 12 is connected to the upper housing 7 via a long pin 19; and the pressure plate 12 can rotate around the long pin 19; wherein, the long pin 19 is a standard part; the other end of the pressure plate 12 is provided with a circular boss, which is limited by the flange-shaped end face of the long slide rod 16 to ensure that the float 13 is limited in the hole seat of the upper housing 7 before the long slide rod 16 moves upward in a straight line.

[0031] The actuator 3 is electrically connected to the control unit via a cable (the cable is located at the tail end of the actuator 3). Before the actuator 3 receives the control command of the aircraft, the long slide bar 16 will not move, and the buoy 13 is limited in the hole seat of the upper housing 7 by the pressure plate 12.

[0032] The brocade rope 14 is made of lightweight, high-strength, and wear-resistant fiber material. One end is fixed to the buckle 17, and the other end is wrapped around the buoy 13.

[0033] The long compression spring 15 passes through the long slide rod 16, with one end limited by the float washer 18 and the other end limited by the bottom surface of the hole seat of the upper housing 7. In normal state, it is in a compressed state, which allows the float 13 to release and store power.

[0034] The buoy washer 18 is a hollow cylinder with a flange-shaped end face at one end. The center of the cylinder passes through the long slide rod 16, and the part with the flange-shaped end face contacts the buoy 13. The other end limits the long compression spring 15.

[0035] The buckle 17 is made of a semi-circular thin aluminum plate bent into shape and fixed to the bottom surface of the hole seat of the upper shell 7 by connecting screws. Its main function is to fix one end of the nylon rope 14 on the buoy 13 to prevent the buoy 13 from detaching from the underwater vehicle body and thus preventing it from accurately indicating its position.

[0036] Figure 3 This is a schematic diagram of the structure of the launch unit 2 provided in an embodiment of the present invention; as shown below. Figure 3 As shown, The throwing unit 2 includes: a mounting base 20, a throwing block 21, a short slide rod 22, a short compression spring 23, and a steel ball 24; the mounting base 20 is inserted into the lower housing 8 and fixedly connected to the upper surface of the lower housing 8; the throwing block 21 is disposed in the lower housing 8; a through hole is provided on the mounting base 20 for the steel ball 24 to pass through; the steel ball 24 abuts against the throwing block 21; a through hole is provided in the center of the throwing block 21 for the short slide rod 22 to pass through; one end of the short slide rod 22 passes through the mounting base 20 and is connected to the lower slider 6, and the other end abuts against the steel ball 24; the short compression spring 23 is disposed on the periphery of the short slide rod 22, one end abuts against the lower slider 6, and the other end abuts against the mounting base 20.

[0037] The jettison unit 2 is designed to jettison the jettison block 21 when the underwater vehicle loses control, enabling the vehicle to surface. It mainly consists of a mounting base 20, a jettison block 21, a short slide bar 22, a short compression spring 23, and steel balls 24.

[0038] In one optional implementation, Figure 8 This is a front view of the mounting base 20 provided in an embodiment of the present invention; as shown Figure 8 As shown, the mounting base 20 includes a flange and a hollow cylinder that are fixedly connected; The inner diameter of the flange is smaller than the inner diameter of the hollow cylinder; the height of the flange is smaller than the height of the hollow cylinder; the flange is located outside the lower housing 8 and is fixedly connected to the upper surface of the lower housing 8; the hollow cylinder is inserted into the lower housing 8; the hollow cylinder is provided with a through hole for the steel ball 24 to pass through.

[0039] Mounting base 20 is fixed to the upper surface of lower housing 8 by connecting screws, and short slide bar 22 passes through its center. The installed steel ball 24 is limited by short slide bar 22.

[0040] The jettison block 21 uses various forms of heavy objects such as iron blocks or iron sand to meet the jettisoning requirements of various types of aircraft. One end of the jettison block 21 has a countersunk hole, and a spherical hole is machined inside the hole to limit the movement of the steel ball 24.

[0041] The short slide bar 22 is a cylindrical body with a thread at one end and a tapered end at the other. The threaded end is connected to the lower slide block 6, making the short slide bar 22 and the lower slide block 6 a single unit. The tapered flange-shaped cylinder at the other end limits the movement of the steel ball 24 in the mounting base 20.

[0042] The short compression spring 23 passes through the short slide bar 22, and its two ends are respectively limited by the lower slide block 6 and the mounting base 20. In its normal state, it is in a compressed state. This allows the release of the load block 21 by storing energy.

[0043] The steel ball 24 is a standard part, and its main function is to limit the throwing block 21, the mounting base 20 and the short slide bar 22, and fix the throwing block 21 in the hole seat of the lower housing 8.

[0044] In an optional embodiment, the device further includes: a mounting plate 9 and a clamp 10; The driver 3 is installed inside the clamp 10; One end of the mounting plate 9 is fixedly connected to the upper surface of the lower housing 8; the other end of the mounting plate 9 is fixedly connected to the clamp 10.

[0045] In one optional embodiment, the mounting plate 9 is fixedly connected to the lower housing 8 by connecting screws; the mounting plate 9 is fixedly connected to the clamp 10 by connecting screws.

[0046] The mounting plate 9 is made of thin aluminum sheet bent into a Z-shape. Its main function is to fix the driver 3. The mounting plate 9 is fixed to the upper surface of the lower housing 8 by connecting screws.

[0047] Figure 9 This is a side view of the clamp 10 provided in an embodiment of the present invention; as shown Figure 9 As shown, the clamp 10 is made of thin aluminum plate bent into a U-shape. Its main function is to limit and fasten the driver 3. It is fixed to the mounting plate 9 by connecting screws.

[0048] The present invention will be described below through a specific embodiment: 1. The installation sequence of buoy unit 1 is as follows: (1) Wrap the silk rope 14 around the buoy 13, leaving one end of the silk rope 14 exposed; (2) The end of the silk cord 14 is left out and fixed to the buckle 17; (3) Place the long compression spring 15 and the float washer 18 into the upper housing 7 and limit them by the bottom protrusion inside the upper housing 7; (4) Place the buoy 13 into the upper shell 7, press the two pressure plates 12 on the buoy 13, and insert the long slide rod 16 into the through hole in the center of the buoy 13. Through the circular protrusions of the two pressure plates 12, the long slide rod 16 (i.e. the flange-shaped end face of the long slide rod 16) limits the pressure plate 12. (5) The long slide bar 16 passes through the upper housing 7 and is screwed into the upper slide block 5.

[0049] 2. The installation sequence of the ballast jettison unit 2 is as follows: (1) Insert the mounting base 20 into the lower housing 8 and fix it to the upper surface of the lower housing 8; (2) After the part of the upper end of the short slide bar 22 that is exposed on the mounting base 20 is fitted into the short compression spring 23, it is screwed into the lower slide bar 6; (3) The through hole opened on the mounting base 20 is used to assemble the steel ball 24; (4) Install the throwing block 21 inside the lower housing 8; at this time, the steel ball 24 abuts against the throwing block 21 and the short slide bar 22.

[0050] 3. The overall assembly sequence of the device is as follows: (1) The mounting plate 9 is fixed to the upper surface of the lower housing 8 with connecting screws; (2) Secure the clamp 10 for mounting the driver 3 to the mounting plate 9 using connecting screws; (3) Insert the upper and lower sliders 6 into the upper and lower slider slots of the slide rail 4, and connect and position one end of the slide rail 4 to the driver 3 through the positioning pin 11.

[0051] 4. Synchronous bidirectional release action (1) The driver 3 receives the control command of the aircraft and performs a retraction action; (2) The driver 3 drives the slide rail 4 to move to the right, and the upper and lower sliders 6 move in the upper and lower slider grooves of the slide rail 4, that is, from the second connecting block to the first connecting block; (3) As the height on the slide rail 4 increases, the long slide rod 16 will move upward, and the long compression spring 15 will no longer be in a compressed state, thereby releasing the long slide rod 16 from the limit of the pressure plate 12. At this time, the pressure plate 12 rotates around the long pin 19, and the pressure plate 12 no longer presses the float 13. The float 13 moves upward under the action of positive buoyancy, and the silk rope 14 unfolds. (4) The short slide bar 22 is carried upward by the lower slide bar 6 under the action of the short compression spring 23, the steel ball 24 is released from the limit, the throwing block 21 is released, and under its own gravity, it separates from the lower shell 8 and moves downward.

[0052] (5) Complete the synchronous two-way release of buoy unit 1 and ballast unit 2.

[0053] The beneficial effects of this invention are: This invention provides a bidirectional synchronous release device. This device integrates a buoy unit 1 and a jettison unit 2, utilizing a linkage mechanism of a driver 3, a slide rail 4, an upper slider 5, and a lower slider 6 to achieve simultaneous jettisoning and buoy release when the underwater vehicle loses control or malfunctions. The device features a mechanical limit and spring-loaded design, eliminating the need for continuous power supply or pyrotechnics, avoiding environmental interference, and ensuring high safety. The buoy unit 1 is integrated inside the upper shell 7, and the jettison unit 2 is integrated inside the lower shell 8, occupying minimal space and adaptable to various underwater vehicles. The use of standard parts (such as steel balls 24 and pins) and easily machinable aluminum components reduces manufacturing costs. The modular design facilitates disassembly and replacement of components, reducing maintenance complexity.

[0054] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A bidirectional synchronous release device, characterized in that, include: The system comprises a buoy unit, a ballast release unit, a driver, a slide rail, an upper slider, a lower slider, an upper housing, and a lower housing. The buoy unit is disposed within the upper housing and connected to the slide rail via the upper slider. The ballast release unit is disposed within the lower housing and connected to the slide rail via the lower slider. The slide rail is connected to the driver. The driver drives the upper and lower sliders on the slide rail to move, thereby achieving synchronized actions of the buoy unit releasing upward and the ballast release unit releasing downward. The buoy unit includes: a pressure plate, a buoy, a nylon rope, a long compression spring, a long sliding rod, and a buckle; the buoy is disposed inside the upper housing and pressed by the pressure plate; one end of the nylon rope is wound around the buoy, and the other end is fixedly connected to the buckle inside the upper housing; a through hole is provided in the center of the buoy for the long sliding rod to pass through; one end of the long sliding rod limits the pressure plate, and the other end passes through the upper housing and is fixed inside the upper sliding block; the long compression spring is disposed around the long sliding rod, one end of which abuts against the buoy, and the other end of which abuts against the bottom surface of the upper housing; The ejection unit includes: a mounting base, an ejection block, a short slide rod, a short compression spring, and a steel ball; the mounting base is inserted into the lower housing and fixedly connected to the upper surface of the lower housing; the ejection block is disposed within the lower housing; a through hole is provided on the mounting base for the steel ball to pass through; the steel ball abuts against the ejection block; a through hole is provided at the center of the ejection block for the short slide rod to pass through; one end of the short slide rod passes through the mounting base and connects to the lower slide block, and the other end abuts against the steel ball; the short compression spring is disposed around the short slide rod, one end abuts against the lower slide block, and the other end abuts against the mounting base.

2. The apparatus according to claim 1, characterized in that: The slide rail includes a first connecting block and a second connecting block that are fixedly connected; the included angle between the upper surface of the first connecting block and the upper surface of the second connecting block is an obtuse angle; the second connecting block is connected to the driver. A through upper slider groove is provided on the upper surface of the first connecting block and the second connecting block, for inserting the upper slider into and sliding within the upper slider groove; A through-sliding groove is provided on the lower surface of the first connecting block and the second connecting block, for inserting the sliding block into and sliding within the sliding groove.

3. The apparatus according to claim 2, characterized in that: The driver is an electric linear driver or a hydraulic linear driver, used to drive the slide rail to move toward the driver, thereby causing the upper slider to slide along the upper slider groove from the second connecting block to the first connecting block, and the long slide rod to move upward to release the limit on the pressure plate, so that the pressure plate can rotate to release the pressure on the buoy; And for driving the slide rail toward the driver, thereby causing the lower slide block to slide along the lower slide block groove from the second connecting block to the first connecting block, the short slide rod moves upward, and the steel ball releases the restriction on the short slide rod and the throwing block.

4. The apparatus according to claim 1, characterized in that, Also includes: Mounting plate and clamps; The driver is installed inside the clamp; One end of the mounting plate is fixedly connected to the upper surface of the lower housing; the other end of the mounting plate is fixedly connected to the clamp.

5. The apparatus according to claim 1, characterized in that: The pressure plate is connected to the upper housing via a long pin; and the pressure plate can rotate around the long pin.

6. The apparatus according to claim 1, characterized in that: The buoy unit also includes: a buoy washer; The buoy washer has a U-shaped structure with its center passing through the long sliding rod; one end of the buoy washer contacts the buoy, and the other end limits the long compression spring.

7. The apparatus according to claim 1, characterized in that: The mounting base includes a fixedly connected flange and a hollow cylinder; The inner diameter of the flange is smaller than the inner diameter of the hollow cylinder; the height of the flange is smaller than the height of the hollow cylinder; the flange is located outside the lower housing and is fixedly connected to the upper surface of the lower housing; the hollow cylinder is inserted into the lower housing; the hollow cylinder is provided with a through hole for the steel ball to pass through.

8. The apparatus according to claim 1, characterized in that: The buoy is a cylinder with a density less than that of water.

9. The apparatus according to claim 1, characterized in that: The slide rail and the driver are fixedly connected by a locating pin.

10. The apparatus according to claim 1, characterized in that: The mounting plate is fixedly connected to the lower housing by connecting screws; the mounting plate is fixedly connected to the clamp by connecting screws.

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