An adaptive buoyancy regulating device for an inflatable raft

Abstract

The present invention relates to the technical field of inflatable rafts, and discloses an adaptive buoyancy regulating device for an inflatable raft, including an exhaust intensity control mechanism and an intake speed control mechanism, wherein a second longitudinal shell fixedly mounted on the upper surface of a side raft and having a hollow structure inside is provided inside the second longitudinal shell, a conical moving block placed inside the second longitudinal shell and controlling the gas flow speed by controlling the gap between the second longitudinal shell and the inner wall, and a longitudinal threaded rod capable of driving the conical moving block to move longitudinally. The adaptive buoyancy regulating device for an inflatable raft is symmetrically mounted on the sides of two wing rafts, and when the raft body of the inflatable raft moves too fast, seawater can be poured into the inside of the side raft shell, thereby reducing the buoyancy of the side raft, and then reducing the buoyancy of the entire inflatable raft, so as to improve the stability of the inflatable raft, thereby adaptively controlling its buoyancy according to the movement speed of the inflatable raft, and improving the safety of the inflatable raft during operation.

Description

Technical Field

[0001] The invention relates to the technical field of inflatable rafts, in particular to an adaptive buoyancy regulating device for an inflatable raft. Background Art

[0002] With the rapid development of water transportation, small water inflatable rafts are also changing with each passing day. These inflatable rafts are mainly used for the transportation of light goods or emergency disaster relief. They are tools that must be equipped on large and medium-sized ships, commonly used by fishermen or the tourism industry, and lifesaving tools for lifeguards in emergency disaster relief. Some of the inflatable rafts in the existing technology are small boats formed by binding several lifebuoys and wooden boards together, and some are directly made of inflatable cushions into the shape of a hull. The stability and safety of these inflatable rafts are not good.

[0003] To this end, a Chinese patent with publication number "CN202911934U" has disclosed "a lifesaving inflatable raft with a simple structure", whose main structure includes a main raft and two wing rafts arranged on both sides of the main raft, the two wing rafts are symmetrical about the raft center of the main raft, an inflation valve is arranged on the main raft, the airflow between the main raft and the wing rafts is connected, both ends of the wing rafts are longer than the main raft in the length direction, and a woven net is arranged between the ends of the two wing rafts, the woven net is fixedly connected to the wing rafts, when working, the main raft and the wing rafts are quickly inflated to form a raft body, the lifeguard sits on the main raft and paddles to move the raft body, the protruding ends of the two wing rafts on the raft body first approach the rescuer, the rescuer easily grabs the woven net, and with the assistance of the lifeguard, can easily climb onto the woven net to be rescued.

[0004] However, the main raft and two wing rafts constitute the entire inflatable raft body, and high-pressure gas is injected into the inflatable raft body by means of an inflating device so that the raft body can float on the water. However, the stability of the inflatable raft body during operation is related to its draft when bearing heavy objects, especially during the rapid movement of the inflatable raft body, the stability formed by the draft is more important. When the draft is too shallow, the rapidly moving inflatable raft body may lead to an unstable movement state at best, or may cause the inflatable raft body to capsize at worst, which seriously affects the safety of the inflatable raft. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides an adaptive buoyancy regulating device for an inflatable raft, which is symmetrically installed on the sides of two wing rafts. When the raft body of the inflatable raft moves too fast, seawater can be poured into the interior of the side raft shell, thereby reducing the buoyancy of the side raft, and further reducing the buoyancy of the entire inflatable raft to improve the stability of the inflatable raft, thereby adaptively controlling the buoyancy of the inflatable raft according to the movement speed of the inflatable raft, improving the safety of the inflatable raft at work, and solving the above-mentioned technical problems.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an adaptive buoyancy regulating device for an inflatable raft, comprising a side raft with a liquid reserved cavity inside, a liquid axial flow cavity arranged at the center of the side raft and connected to the two end surfaces thereof, an elastic rubber sleeve with two ends embedded in the liquid reserved cavity in a closed form and the central cavity connected to the liquid axial flow cavity, and a No. 1 vent and a No. 2 vent arranged on the top of the side raft and connected to the liquid axial flow cavity, and also comprising an exhaust intensity control mechanism, wherein a No. 1 longitudinal shell fixedly mounted on the upper surface of the side raft and having a hollow structure inside is arranged inside, a valve plate placed inside the No. 1 longitudinal shell and capable of blocking the No. 1 vent port, and a coil spring that exerts downward elastic pressure on the valve plate are arranged inside; and an air intake speed control mechanism, wherein a No. 2 longitudinal shell fixedly mounted on the upper surface of the side raft and having a hollow structure inside is arranged inside, a conical moving block placed inside the No. 2 longitudinal shell and capable of controlling the gas flow speed by controlling the gap between the No. 2 longitudinal shell and the inner wall of the No. 2 longitudinal shell, and a longitudinal threaded rod capable of driving the conical moving block to move longitudinally are arranged inside.

[0007] Preferably, one end of the side raft is provided with an arc-shaped guide surface capable of reducing liquid resistance during movement.

[0008] Preferably, the opening end of the liquid axial flow cavity located at the arc-shaped guide surface is provided with a chamfered structure for facilitating the liquid to enter the interior of the liquid axial flow cavity.

[0009] Preferably, the elastic rubber sleeve is made of a rubber material with elastic extension function.

[0010] Preferably, the exhaust intensity control mechanism includes a No. 1 longitudinal shell, the bottom of the No. 1 longitudinal shell is provided with a No. 1 fixed end which is an integral structure with the No. 1 longitudinal shell and fixedly mounted on the upper surface of the side raft, the interior of the No. 1 longitudinal shell is provided with a No. 1 component active cavity, the interior of the No. 1 fixed end is provided with a No. 3 vent hole which connects the top of the No. 1 vent hole and the bottom of the No. 1 component active cavity, the top of the No. 1 longitudinal shell is provided with a No. 4 vent hole which connects the external space and the top of the No. 1 component active cavity, the No. 1 longitudinal shell is provided with a valve plate which can move axially along the No. 1 component active cavity, the bottom end of the valve plate is provided with an annular embedding groove, the valve plate is embedded with an annular sealing ring inside the annular embedding groove, the circumferential surface of the valve plate is provided with a plurality of gas flow grooves with an inwardly concave structure, and a coil spring is installed on the top of the valve plate.

[0011] Preferably, the depth of the annular embedded groove is smaller than the thickness of the annular sealing ring, the structural radius of the inner ring of the annular sealing ring is larger than the structural radius of the No. 3 air vent, and the structural radius of the outer ring of the annular sealing ring is smaller than the distance between the gas flow groove and the axial centerline of the valve plate.

[0012] Preferably, the initial length of the coil spring is greater than the depth of the movable cavity of the No. 1 component, and the bottom end of the coil spring abuts against the upper surface of the valve plate, and the top end abuts against the top end of the movable cavity of the No. 1 component.

[0013] Preferably, the air intake speed control mechanism includes a No. 2 longitudinal shell, the bottom of the No. 2 longitudinal shell is provided with a No. 2 fixed end which is an integral structure with it and fixedly installed on the upper surface of the side raft, the interior of the No. 2 longitudinal shell is provided with a No. 2 component active cavity, the bottom end of the No. 2 component active cavity is provided with a conical cavity, the bottom end of the No. 2 fixed end is provided with a No. 5 vent hole connecting the top end of the No. 2 vent hole and the bottom end of the conical cavity, the top end of the No. 2 longitudinal shell is provided with an inner screw connecting the space above it and the No. 2 component active cavity The outer periphery of the internal threaded hole is provided with a No. 6 vent hole connecting the external space and the movable cavity of the No. 2 component, a conical moving block is placed inside the conical cavity, a conical sealing sleeve is installed on the conical surface of the conical moving block, a rotatable fixed connecting shaft is installed on the top of the conical moving block through a bearing, a longitudinal threaded rod passing through the internal threaded hole is fixedly installed on the top of the fixed connecting shaft, the rod body of the longitudinal threaded rod is installed in the internal threaded hole through a threaded structure, and a rotating cap is fixedly installed on the top of the longitudinal threaded rod.

[0014] Preferably, the structural radius of the bottom end of the conical sealing sleeve is consistent with the structural radius of the bottom end of the conical cavity, the structural radius of the top end of the conical sealing sleeve is smaller than the structural radius of the top end of the conical cavity, and the conical surface of the conical sealing sleeve matches the conical surface of the conical cavity.

[0015] Preferably, the thread structure includes an internal thread structure arranged in the internal thread hole and an external thread structure arranged on the longitudinal threaded rod body, and the internal thread structure matches the external thread structure.

[0016] Compared with the prior art, the present invention provides an adaptive buoyancy regulating device for an inflatable raft, which has the following beneficial effects:

[0017] Symmetrically installed on the sides of the two wing rafts, when the inflatable raft body moves too fast, seawater can be poured into the inside of the side raft shell, thereby reducing the buoyancy of the side raft, and then reducing the buoyancy of the entire inflatable raft to improve the stability of the inflatable raft, thereby adaptively controlling its buoyancy according to the movement speed of the inflatable raft, and improving the safety of the inflatable raft during operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A perspective view of the present invention;

[0019] Figure 2 is a three-dimensional cross-sectional view of the present invention;

[0020] Figure 3 is a three-dimensional diagram of the elastic rubber sleeve of the present invention;

[0021] Figure 4 is a three-dimensional cross-sectional view of the elastic rubber sleeve of the present invention;

[0022] Figure 5 is a three-dimensional diagram of the valve plate in the present invention;

[0023] Figure 6 is a three-dimensional cross-sectional view of the air intake speed control mechanism of the present invention;

[0024] Figure 7 It is a three-dimensional combination diagram of the conical moving block and the conical sealing sleeve in the present invention.

[0025] Among them: 1. side raft; 2. liquid reserved cavity; 3. liquid axial flow cavity; 4. arc-shaped guide surface; 5. elastic rubber sleeve; 6. No. 1 vent hole; 7. No. 2 vent hole; 8. exhaust intensity control mechanism; 81. No. 1 longitudinal shell; 82. No. 1 fixed end; 83. No. 1 component active cavity; 84. No. 3 vent hole; 85. No. 4 vent hole; 86. valve plate; 87. annular embedded groove; 88. annular sealing ring; 89 , gas flow groove; 810, coil spring; 9, intake speed control mechanism; 91, No. 2 longitudinal shell; 92, No. 2 fixed end; 93, No. 2 component movable cavity; 94, conical cavity; 95, No. 5 vent hole; 96, internal threaded hole; 97, No. 6 vent hole; 98, longitudinal threaded rod; 99, rotating cap; 910, fixed connecting shaft; 911, conical moving block; 912, conical sealing sleeve; 10, chamfered structure. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] See also Figure 1 , Figure 2 and Figure 3, an adaptive buoyancy regulating device for an inflatable raft, comprising a side raft 1 with a liquid reserved cavity 2 arranged inside, a liquid axial flow cavity 3 arranged at the center of the side raft 1 and connected to the two end surfaces thereof, an elastic rubber sleeve 5 with both ends embedded in the liquid reserved cavity 2 in a closed form and the central cavity connected to the liquid axial flow cavity 3, and a No. 1 vent 6 and a No. 2 vent 7 arranged on the top of the side raft 1 and connected to the liquid axial flow cavity 3. In order to reduce the resistance of the water flow, it is necessary to provide an arc-shaped guide surface 4 at one end of the side raft 1 to reduce the resistance of the liquid during movement. In order to facilitate the introduction of seawater, it is necessary to provide a chamfered structure 10 at the open end of the liquid axial flow cavity 3 located at the arc-shaped guide surface 4 to facilitate the entry of liquid into the liquid axial flow cavity 3. In order to have the driving function for gas and seawater, it is necessary to The elastic rubber sleeve 5 is made of a rubber material with elastic extension function. Two side rafts 1 are taken and symmetrically installed on the sides of the two wing rafts, wherein the direction of the arc-shaped guide surface 4 is the forward direction of the inflatable raft. During the forward movement, seawater will enter the elastic rubber sleeve 5 through the chamfered structure 10 and the liquid axial flow cavity 3 at the head, and then be discharged through the liquid axial flow cavity 3 at the tail. When the inflatable raft runs smoothly, the liquid entering the elastic rubber sleeve 5 and the liquid discharged from the liquid axial flow cavity 3 are in a balanced state. Once the inflatable raft runs too fast, the amount of seawater entering will be greater than its discharge, and the excess seawater will be stored in the elastic rubber sleeve 5, causing the elastic rubber sleeve 5 to expand. At this time, the overall mass of the side raft 1 will increase due to the addition of seawater, thereby forming a more stable resistance.

[0028] In order to further increase the stability of the inflation valve in the case of excessive seawater reserve, please refer to Figure 1 , Figure 2 , Figure 4 and Figure 5 , it is necessary to set up an exhaust intensity control mechanism 8, which is provided with a No. 1 longitudinal shell 81 fixedly mounted on the upper surface of the side raft 1 and having a hollow structure inside, a valve plate 86 placed inside the No. 1 longitudinal shell 81 and capable of blocking the port of the No. 1 vent hole 6, and a coil spring 810 that generates downward elastic pressure on the valve plate 86. When the speed of the inflation valve is increased again, the elastic rubber sleeve 5 continues to expand. At this time, the gas pressure inside the liquid reserved cavity 2 will further increase. When the air pressure is greater than the elastic pressure of the coil spring 810, the valve plate 86 will move upward, so that the gas inside the liquid reserved cavity 2 is discharged outward along the No. 1 vent hole 6, the No. 3 vent hole 84, the gap of the valve plate 86, the No. 1 component active cavity 83 and the No. 4 vent hole 85, thereby reducing the air pressure inside the liquid reserved cavity 2, so that the elastic rubber sleeve 5 has the ability to further expand, thereby further improving the operating stability of the inflatable raft.

[0029] For the specific structure of the exhaust intensity control mechanism 8, please refer to Figure 4 and Figure 5 , including a No. 1 longitudinal shell 81, the bottom of the No. 1 longitudinal shell 81 is provided with a No. 1 fixed end 82 which is an integral structure with it and fixedly installed on the upper surface of the side raft 1, the interior of the No. 1 longitudinal shell 81 is provided with a No. 1 component active cavity 83, the interior of the No. 1 fixed end 82 is provided with a No. 3 vent 84 which connects the top of the No. 1 vent hole 6 and the bottom of the No. 1 component active cavity 83, the top of the No. 1 longitudinal shell 81 is provided with a No. 4 vent 85 which connects the external space and the top of the No. 1 component active cavity 83, the No. 1 longitudinal shell 81 is provided with a valve plate 86 which can move axially along the No. 1 component active cavity 83, the bottom end of the valve plate 86 is provided with an annular embedding groove 87, the valve plate 86 is located at the annular embedding groove An annular sealing ring 88 is embedded in the groove 87, and the circumferential surface of the valve plate 86 is provided with a plurality of concave gas flow grooves 89. In order to prevent liquid leakage, it is necessary to make the depth of the annular embedded groove 87 smaller than the thickness of the annular sealing ring 88, the structural radius of the inner ring of the annular sealing ring 88 is larger than the structural radius of the No. 3 air vent 84, and the structural radius of the outer ring of the annular sealing ring 88 is smaller than the distance between the axial line of the gas flow groove 89 and the valve plate 86. A coil spring 810 is installed on the top of the valve plate 86, and the initial length of the coil spring 810 is larger than the depth of the active cavity 83 of the No. 1 component, and the bottom end of the coil spring 810 abuts against the upper surface of the valve plate 86, and the top end abuts against the top of the active cavity 83 of the No. 1 component.

[0030] In order to allow the external gas to enter the liquid reserved cavity 2 at a controllable speed, thereby preventing the sudden discharge of liquid and causing the inflatable raft to run unstably, please refer to Figure 1 , Figure 2 , Figure 6 and Figure 7, it is necessary to set up an intake speed control mechanism 9, which is provided with a second longitudinal shell 91 fixedly mounted on the upper surface of the side raft 1 and having a hollow structure inside, a conical moving block 911 placed inside the second longitudinal shell 91 and controlling the gap between the second longitudinal shell 91 and the inner wall thereof to control the gas flow speed, and a longitudinal threaded rod 98 capable of driving the conical moving block 911 to move longitudinally. When the speed of the inflatable raft slows down, the elastic rubber sleeve 5's own retraction ability will enable it to move the The seawater is pressed outwards, and at the same time, the air pressure inside the reserved liquid cavity 2 is reduced, and the external gas is replenished into the reserved liquid cavity 2 through the No. 6 vent 97, the gap between the conical sealing sleeve 912 and the conical cavity 94, the No. 5 vent 95 and the No. 2 vent 7. At the same time, by controlling the gap between the conical sealing sleeve 912 and the conical cavity 94, the speed of the gas flow can be controlled to alleviate the retraction speed of the elastic rubber sleeve 5, thereby preventing the sudden discharge of liquid and causing the inflatable raft to be unstable.

[0031] For the specific structure of the intake speed control mechanism 9, please refer to Figure 6 and Figure 7 , including a No. 2 longitudinal shell 91, the bottom of the No. 2 longitudinal shell 91 is provided with a No. 2 fixed end 92 which is an integral structure with it and fixedly installed on the upper surface of the side raft 1, the interior of the No. 2 longitudinal shell 91 is provided with a No. 2 component active cavity 93, the bottom end of the No. 2 component active cavity 93 is provided with a conical cavity 94, the bottom end of the No. 2 fixed end 92 is provided with a No. 5 vent 95 connecting the top of the No. 2 vent hole 7 and the bottom end of the conical cavity 94, the top of the No. 2 longitudinal shell 91 is provided with an internal threaded hole 96 connecting the space above it and the No. 2 component active cavity 93, the periphery of the internal threaded hole 96 is provided with a No. 6 vent 97 connecting the external space and the No. 2 component active cavity 93, a conical moving block 911 is placed inside the conical cavity 94, and a conical sealing sleeve 912 is installed on the conical surface of the conical moving block 911. In order to have the function of changing the size of the gas flow gap It is necessary to make the structural radius of the bottom end of the conical sealing sleeve 912 consistent with the structural radius of the bottom end of the conical cavity 94, the structural radius of the top end of the conical sealing sleeve 912 is smaller than the structural radius of the top end of the conical cavity 94, and the conical surface of the conical sealing sleeve 912 matches the conical surface of the conical cavity 94, and the top of the conical moving block 911 is equipped with a rotatable fixed connecting shaft 910 through a bearing, and the top of the fixed connecting shaft 910 is fixedly equipped with a longitudinal threaded rod 98 passing through the internal threaded hole 96, and the rod body of the longitudinal threaded rod 98 is installed in the internal threaded hole 96 through a threaded structure. Specifically, the threaded structure includes an internal threaded structure arranged in the internal threaded hole 96 and an external threaded structure arranged on the rod body of the longitudinal threaded rod 98, and the internal threaded structure matches the external threaded structure, and the top of the longitudinal threaded rod 98 is fixedly equipped with a rotating cap 99.

[0032] When in use, two side rafts 1 are taken and symmetrically installed on the sides of the two wing rafts, wherein the direction of the arc-shaped guide surface 4 is the forward direction of the inflatable raft. During the forward process, seawater will enter the elastic rubber sleeve 5 through the chamfered structure 10 and the liquid axial flow chamber 3 at the head, and then be discharged through the liquid axial flow chamber 3 at the tail. When the inflatable raft runs smoothly, the liquid entering the elastic rubber sleeve 5 and the liquid discharged from the liquid axial flow chamber 3 are in a balanced state. Once the inflatable raft runs too fast, the amount of seawater entering will be greater than its discharge amount, and the excess seawater will be stored in the elastic rubber sleeve 5, causing the elastic rubber sleeve 5 to expand. When the speed of the inflation valve is increased again, the elastic rubber sleeve 5 continues to expand. At this time, the gas pressure inside the liquid reserved cavity 2 will further increase. When the gas pressure is greater than the elastic pressure of the coil spring 810, the valve plate 86 will be caused. The air in the reserved cavity 2 is discharged outwardly along the No. 1 vent hole 6, the No. 3 vent hole 84, the gap of the valve plate 86, the No. 1 component active cavity 83 and the No. 4 vent hole 85, thereby reducing the air pressure in the reserved cavity 2, so that the elastic rubber sleeve 5 has the ability to further expand, thereby further improving the running stability of the inflatable raft. When the speed of the inflatable raft slows down, the elastic rubber sleeve 5's own retraction ability will cause it to press the seawater inside outward. At the same time, the air pressure in the reserved cavity 2 is reduced, and the external gas is replenished into the reserved cavity 2 through the No. 6 vent hole 97, the gap between the conical sealing sleeve 912 and the conical cavity 94, the No. 5 vent hole 95 and the No. 2 vent hole 7. At the same time, by controlling the gap between the conical sealing sleeve 912 and the conical cavity 94, the speed of the gas flow can be controlled to alleviate the retraction speed of the elastic rubber sleeve 5.

[0033] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An adaptive buoyancy regulating device for an inflatable raft, comprising a side raft (1) having a liquid reserved cavity (2) therein, a liquid axial flow cavity (3) arranged at the center of the side raft (1) and connected to both end surfaces thereof, an elastic rubber sleeve (5) with both ends embedded in the liquid reserved cavity (2) in a closed form and with the central cavity connected to the liquid axial flow cavity (3), and a first vent hole (6) and a second vent hole (7) arranged at the top of the side raft (1) and connected to the liquid axial flow cavity (3), characterized in that: Also includes, An exhaust intensity control mechanism (8) is provided with a first longitudinal shell (81) fixedly mounted on the upper surface of the side raft (1) and having a hollow structure inside, a valve plate (86) placed inside the first longitudinal shell (81) and capable of blocking the port of the first vent hole (6), and a coil spring (810) for generating downward elastic pressure on the valve plate (86); and an air intake speed control mechanism (9), wherein a second longitudinal shell (91) is fixedly mounted on the upper surface of the side raft (1) and has a hollow interior, a conical moving block (911) is placed inside the second longitudinal shell (91) and controls the gas flow speed by controlling the gap between the conical moving block (91) and the inner wall of the second longitudinal shell (91), and a longitudinal threaded rod (98) is provided inside the conical moving block (911) and can drive the conical moving block (911) to move longitudinally; The exhaust intensity control mechanism (8) comprises a first longitudinal shell (81), the bottom of the first longitudinal shell (81) is provided with a first fixed end (82) which is an integral structure with the first longitudinal shell (81) and fixedly mounted on the upper surface of the side raft (1), the interior of the first longitudinal shell (81) is provided with a first component active cavity (83), the interior of the first fixed end (82) is provided with a third vent hole (84) which communicates with the top end of the first vent hole (6) and the bottom end of the first component active cavity (83), the top of the first longitudinal shell (81) is provided with a third vent hole (84) which communicates with the outside space and the first component active cavity (83), and the third vent hole (84) which communicates with the top end of the first vent hole (6) and the bottom end of the first component active cavity (83) is provided with a third vent hole (84) which communicates with the outside space and the first component active cavity (83). 3) a fourth vent hole (85) at the top, the first longitudinal housing (81) being provided with a valve plate (86) capable of axial movement along the first component active cavity (83) inside the first component active cavity (83), the bottom end of the valve plate (86) being provided with an annular embedding groove (87), the valve plate (86) being provided with an annular sealing ring (88) embedded inside the annular embedding groove (87), the circumferential surface of the valve plate (86) being provided with a plurality of gas flow grooves (89) of an inner concave structure, and the top of the valve plate (86) being provided with a coil spring (810); The air intake speed control mechanism (9) comprises a second longitudinal shell (91), the bottom of the second longitudinal shell (91) is provided with a second fixed end (92) which is an integral structure with the second longitudinal shell (91) and fixedly mounted on the upper surface of the side raft (1), the interior of the second longitudinal shell (91) is provided with a second component movable cavity (93), the bottom end of the second component movable cavity (93) is provided with a conical cavity (94), the bottom end of the second fixed end (92) is provided with a fifth vent hole (95) which communicates with the top end of the second vent hole (7) and the bottom end of the conical cavity (94), the top end of the second longitudinal shell (91) is provided with an internal threaded hole (96) which communicates with the space above it and the second component movable cavity (93), the internal threaded hole (96) is provided with a threaded hole (96) which communicates with the space above it and the second component movable cavity (93), and the internal threaded hole (96) is provided with a threaded hole (96) which communicates with the space above it and the second component movable cavity (93). A sixth vent hole (97) is arranged on the periphery of the groove hole (96) for connecting the external space and the movable cavity (93) of the second component; a conical moving block (911) is placed inside the conical cavity (94); a conical sealing sleeve (912) is installed on the conical surface of the conical moving block (911); a rotatable fixed connecting shaft (910) is installed on the top of the conical moving block (911) through a bearing; a longitudinal threaded rod (98) passing through the internal threaded hole (96) is fixedly installed on the top of the fixed connecting shaft (910); the rod body of the longitudinal threaded rod (98) is installed in the internal threaded hole (96) through a threaded structure; and a rotating cap (99) is fixedly installed on the top of the longitudinal threaded rod (98).

2. The adaptive buoyancy regulating device for an inflatable raft according to claim 1, characterized in that: One end of the side raft (1) is provided with an arc-shaped guide surface (4) capable of reducing liquid resistance during movement.

3. The adaptive buoyancy regulating device for an inflatable raft according to claim 2, characterized in that: The opening end of the liquid axial flow cavity (3) located at the arc-shaped guide surface (4) is provided with a chamfered structure (10) for facilitating the liquid to enter the liquid axial flow cavity (3).

4. The adaptive buoyancy regulating device for an inflatable raft according to claim 3, characterized in that: The elastic rubber sleeve (5) is made of a rubber material having an elastic extension function.

5. The adaptive buoyancy regulating device for an inflatable raft according to claim 4, characterized in that: The depth of the annular embedding groove (87) is smaller than the thickness of the annular sealing ring (88), the structural radius of the inner ring of the annular sealing ring (88) is larger than the structural radius of the third vent hole (84), and the structural radius of the outer ring of the annular sealing ring (88) is smaller than the distance between the axial center line of the gas flow groove (89) and the valve plate (86).

6. The adaptive buoyancy regulating device for an inflatable raft according to claim 5, characterized in that: The initial length of the coil spring (810) is greater than the depth of the movable cavity (83) of the first component, and the bottom end of the coil spring (810) abuts against the upper surface of the valve plate (86), and the top end abuts against the top end of the movable cavity (83) of the first component.

7. The adaptive buoyancy regulating device for an inflatable raft according to claim 6, characterized in that: The structural radius of the bottom end of the conical sealing sleeve (912) is consistent with the structural radius of the bottom end of the conical cavity (94), the structural radius of the top end of the conical sealing sleeve (912) is smaller than the structural radius of the top end of the conical cavity (94), and the conical surface of the conical sealing sleeve (912) matches the conical surface of the conical cavity (94).

8. The adaptive buoyancy regulating device for an inflatable raft according to claim 7, characterized in that: The thread structure comprises an internal thread structure arranged in the internal thread hole (96) and an external thread structure arranged on the rod body of the longitudinal thread rod (98), and the internal thread structure matches the external thread structure.

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