A buoyancy driven retractable device for a deep water pool

Abstract

The application relates to a buoyancy-driven telescopic device for a deep-water pool, which comprises a fixed truss serving as a base support structure of the whole device, a guide mechanism installed inside the fixed truss for limiting the sliding path of a buoyancy system and a movable truss in the fixed truss, the buoyancy system being installed at the bottom of the movable truss and used for driving the movable truss to realize long-distance floating and sinking movement, and the movable truss being arranged in a nested mode with the fixed truss and realizing telescopic movement by being driven by the buoyancy system. The device realizes long-distance floating and sinking movement of the movable truss by changing buoyancy, and does not need to rely on external power or hydraulic energy. The device is compact and reasonable in structure, convenient to operate, does not need external power or hydraulic energy by using the buoyancy system as a driving mechanism, thereby solving the problems of deep-water environment adaptability and low long-term use reliability, and reducing energy consumption and maintenance cost.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of water tank test, in particular to a buoyancy-driven retractable device for a deep water tank. BACKGROUND

[0002] Model test in a deep water tank is an important part of ship and ocean engineering technology research. The influence of water depth and environmental factors such as wind, wave and current on test results needs to be considered in the test. Generally, in order to accurately simulate different water depths corresponding to the test conditions according to the model scale ratio, a large-area false bottom platform with height adjustment function is configured in the deep water tank. During the test, the false bottom platform is lifted to the set position according to the test requirements, and the upper surface of the false bottom platform is the test water depth. In order to arrange test equipment such as auxiliary light source and high-speed camera under different water depth conditions, a fixed-height truss device is usually installed on the lifting false bottom platform of the deep water tank.

[0003] When the deep water tank carries out large water depth test, the water depth of the false bottom platform is generally more than 20 meters, and even more than 30 meters. Due to the height limitation of the enclosed water tank and the safety in use, the height of the fixed truss device cannot meet the technical requirements of large water depth test. Therefore, developing a retractable variable-height truss device is an important technical approach to solve this problem. For traditional retractable devices, the driving mechanism generally uses electric push rod, air cylinder, hydraulic cylinder and other forms. In order to adapt to different water depth environments, the design of mechanical and electrical structure is complex, and there are problems such as short retractable distance, low long-term reliability and high construction and maintenance cost, mainly including the following problems:

[0004] Deep water environment adaptability: the traditional retractable device has complex mechanical and electrical structure design and low long-term reliability in deep water environment due to water pressure and corrosion.

[0005] Limited retractable distance: the existing retractable device often has the problem of short retractable distance, which is difficult to meet the technical requirements of large water depth test.

[0006] High construction and maintenance cost: the traditional retractable device needs to use electric push rod, air cylinder, hydraulic cylinder and other driving mechanisms. These mechanical parts need regular maintenance and maintenance, and the manufacturing cost is high.

[0007] Affected by the wave environment on the water surface: when the retractable device is fully expanded, it is greatly affected by the wave environment on the water surface, which may affect the stability and service life of the device.

[0008] Therefore, we propose a buoyancy-driven retractable device for a deep water tank. SUMMARY

[0009] In view of the above-mentioned shortcomings of the prior production technology, the present applicant provides a buoyancy-driven retractable device for a deep water pool, which utilizes a buoyancy system as a driving mechanism and does not require external power or hydraulic energy, thereby solving the problems of deep water environment adaptability and low long-term use reliability, while reducing energy consumption and maintenance costs.

[0010] The technical solutions adopted by the present application are as follows:

[0011] A buoyancy-driven retractable device for a deep water pool comprises:

[0012] A fixed truss serves as a basic support structure of the entire device;

[0013] A guide mechanism is installed inside the fixed truss to limit the sliding path of the buoyancy system and the movable truss within the fixed truss;

[0014] A buoyancy system is installed at the bottom of the movable truss to drive the movable truss to perform long-distance floating and sinking movements;

[0015] A movable truss serves as a retractable part of the device and is arranged in a nested manner with the fixed truss to achieve retractable movement driven by the buoyancy system;

[0016] In this device, long-distance floating and sinking movements of the movable truss are achieved through buoyancy changes, without relying on external power or hydraulic energy.

[0017] Further, the fixed truss comprises a base, a pin truss, a pin assembly, a lifting eye screw, and a hanging rack, the pin trusses are arranged in series to form a fixed truss body, the base is fixedly connected to a lifting false bottom platform of the pool, the lifting eye screw is installed at the center position of the base steel plate to connect the fixed truss and the movable truss, and the hanging rack is arranged on the web of the pin truss to facilitate the arrangement of test equipment.

[0018] Further, the base is made of stainless steel and has a square cross-section truss structure, and the bottom is a square steel plate, with support feet welded between the truss chords and the steel plate to improve the structural strength and rigidity.

[0019] Further, the pin truss is made of high-strength aluminum alloy, the surface is hard anodized and then sprayed with epoxy resin, and the connection between the pin trusses and the base is achieved through the pin assembly, which facilitates assembly and disassembly.

[0020] Further, the guide mechanism comprises guide wheels, a guide wheel base, guide wheel shafts, and a jam screw, the guide wheels are made of nylon, one side of the guide wheel base is arc-shaped to increase the contact area with the web, and the other side is provided with a waist-shaped hole for installing the guide wheels and the guide wheel shafts, and the jam screw is used to adjust the gap between the movable truss and the fixed truss.

[0021] Further, the buoyancy system comprises a plurality of middle-hole through floating balls, spacer rings, connecting rods, support plates, pressing plates, stainless steel chains and quick connecting rings, the middle-hole through floating balls are arranged in series through the spacer rings on the connecting rods, one end of the connecting rod is connected with the support plate, and the other end is connected with the pressing plate, the stainless steel chain is arranged from the inside of the connecting rod, one end of the stainless steel chain is connected with the fixed truss base, and the other end is connected with the movable truss through the quick connecting ring.

[0022] Further, the middle-hole through floating ball is made of ABS plastic material, and the number is determined according to the calculation of the net buoyancy requirement, and the middle part of the spacer ring is provided with a water permeable hole structure, so that the buoyancy is effectively transmitted to the movable truss.

[0023] Further, the movable truss comprises a bolt truss, a bolt assembly, a top plate and a top hanging rack, the movable truss body is composed of bolt trusses made of aluminum alloy material arranged in series, the cross-sectional size is slightly smaller than that of the fixed truss, and the movable truss can be arranged in the fixed truss, the top plate is located at the top of the movable truss and used for mounting the top hanging rack and as a physical limiting device.

[0024] Further, the bolt trusses are connected through the bolt assembly to form a telescopic structure, and the design of the bolt assembly enables the movable truss to remain stable during telescoping, and facilitates assembly and disassembly.

[0025] Further, the working principle of the device is that by adjusting the effective length of the stainless steel chain and locking, when the false bottom platform is lowered, the middle-hole through floating ball of the buoyancy system is immersed in water to provide net buoyancy to overcome the weight and friction of the movable truss, so that the movable truss moves upward along the fixed truss under the guidance of the guide mechanism; when the false bottom platform is raised, the floating ball is exposed to the water surface, the net buoyancy is reduced, and the movable truss is gradually contracted by relying on the weight, and the physical limiting is realized by the top plate.

[0026] The beneficial effects of the present application are as follows:

[0027] The present application has the advantages of compact and reasonable structure, convenient operation, use of the buoyancy system as a driving mechanism without external power or hydraulic energy, solving the problems of deep water environment adaptability and low long-term use reliability, reducing energy consumption and maintenance cost, multi-stage telescopic design, long-distance telescopic function of the device, enhanced applicability in different water depths, improved test efficiency, simple structure without mechanical parts such as motors and oil pumps, reduced construction and maintenance cost, improved corrosion resistance and service life, floating system installed at the bottom of the movable truss, reduced adverse effects of water waves on structural stability, ensured stable operation of the device in deep water environment, improved test accuracy and reliability, and wide application prospect.

[0028] Meanwhile, the present application also has the following advantages:

[0029] Adopt buoyancy drive: the present application adopts buoyancy system as driving mechanism, uses buoyancy change to drive movable truss to make long-distance floating and sinking movement. This design does not need external power or hydraulic energy and other mechanical parts, solves the problems of deep water environment adaptability and low long-term use reliability. Meanwhile, the buoyancy drive mode also reduces the energy consumption and maintenance cost of the device.

[0030] Increase the telescopic distance: through the design of multi-stage telescopic buoyancy system and movable truss, the long-distance telescopic function is realized. The effective length of stainless steel chain can be adjusted through quick link, further increasing the flexibility of telescoping. This makes the device meet the test requirements under different water depth conditions.

[0031] Reduce construction and maintenance cost: the whole device has no motor, oil pump and other mechanical parts, the structure is relatively simple. This not only reduces the manufacturing cost of the device, but also reduces the difficulty of maintenance and maintenance. At the same time, the use of aluminum alloy and stainless steel and other materials also improves the corrosion resistance and service life of the device.

[0032] Reduce the influence of water surface wave environment: the buoyancy system is installed at the bottom of the movable truss. When the device is fully deployed, the buoyancy system is far away from the water surface, thereby reducing the adverse effects of water surface wave environment on the stability of the structure. This makes the device keep stable operation in deep water environment, improves the accuracy and reliability of the test.

[0033] Improve test efficiency: the telescopic function of the device makes it more convenient and fast to arrange test equipment under different water depth conditions. The operator can quickly adjust the telescopic distance and height of the device according to the test requirements, thereby improving the test efficiency. At the same time, the stability and reliability of the device also ensure the accuracy and credibility of the test results. BRIEF DESCRIPTION OF DRAWINGS

[0034] Figure 1 It is a schematic diagram of the three-dimensional structure of the present application.

[0035] Figure 2 It is a schematic diagram of the connection structure of the guide mechanism and the fixed truss and movable truss in the present application.

[0036] Figure 3 It is a three-dimensional schematic diagram of the guide mechanism in the present application.

[0037] Figure 4 It is a three-dimensional schematic diagram of the spacer ring in the present application.

[0038] Figure 5 It is a three-dimensional schematic diagram of the buoyancy system in the present application.

[0039] In the figure: 1, fixed truss; 11, base; 12, bolt truss; 13, bolt assembly; 14, hanging ring screw; 15, hanging rack; 2, guide mechanism; 21, guide wheel; 22, guide wheel base; guide wheel shaft 23; plug screw 24; 3, buoyancy system; 31, middle hole through floating ball; 32, spacer ring; 33, connecting rod; 34, support plate; 35, compression plate; 36, stainless steel chain; 37, quick connector ring; 4, movable truss; 41, bolt truss; 42, bolt assembly; 43, top plate; 44, top hanging rack. DETAILED DESCRIPTION

[0040] The specific embodiments of the present application will be described below in conjunction with the accompanying drawings.

[0041] As Figures 1-5 shown, the embodiment discloses a buoyancy-driven retractable device for deep water pool, which includes fixed truss 1, guide mechanism 2, buoyancy system 3 and movable truss 4. The present application proposes an innovative buoyancy-driven retractable device, which aims to realize long-distance floating and sinking movement of the movable truss through buoyancy change, without relying on external power or hydraulic energy source, with the advantages of simple structure, low cost, convenient maintenance, etc. The following is a comprehensive exposition of the detailed implementation scheme of the device.

[0042] As Figure 1 shown, the fixed truss 1 in the embodiment serves as the basic support structure of the entire device, which fully considers the use height and lightweight requirements, including base 11, bolt truss 12, bolt assembly 13, hanging ring screw 14 and hanging rack 15. In order to meet the use height and lightweight requirements, the main body of the fixed truss 1 is composed of a plurality of bolt trusses 12 of the same specification arranged in series.

[0043] Specifically, the base 11 is made of stainless steel, with a square cross-section truss structure and a square steel plate at the bottom. The truss chord of the base 11 is welded with support feet between the steel plate to improve the structural strength and rigidity. The base 11 is fixed to the pool lifting false bottom platform by welding, screwing, etc., with a hanging ring screw 14 installed at the center of the steel plate. The hanging ring screw 14, as a key component connecting the fixed truss 1 and the movable truss 4, can be connected to the movable truss 4 through the quick connector ring 37 and the stainless steel chain 36. The stainless steel material improves the corrosion resistance and structural strength of the base, the square cross-section design enhances the overall stability, and the hanging ring screw simplifies the connection process and improves the installation efficiency.

[0044] The latch truss 12 in the embodiment is made of high-strength aluminum alloy material, and the surface is anodized and then sprayed with epoxy resin to prevent water erosion. The connection between the latch trusses 12 and the base 11 is realized through the latch assemblies 13, facilitating assembly and disassembly. The aluminum alloy material reduces the overall weight, the hard anodization and the epoxy resin coating enhance the corrosion resistance, and the design of the latch assembly improves the assembly flexibility and reduces the maintenance cost. The latch assembly 13 is used to connect the latch truss 12 and the base 11, realizing the stable construction of the fixed truss 1.

[0045] The hanging rack 15 in the embodiment is arranged on the web of the latch truss 12 and can be installed at different heights as needed, facilitating the arrangement of underwater lamps, control boxes, underwater cameras and other test equipment under different water depth conditions. The design of the hanging rack 15 improves the versatility and flexibility of the device, facilitating the arrangement of test equipment under different water depth conditions.

[0046] As shown in Figure 2 and Figure 3 The guide mechanism 2 in the embodiment is installed inside the fixed truss 1 and is used to limit the sliding path of the buoyancy system 3 and the movable truss 4 in the fixed truss 1, ensuring smooth movement. The structure includes a guide wheel 21, a guide wheel base 22, a guide wheel shaft 23 and a jam screw 24. The guide mechanism 2 is installed inside the fixed truss 1, thereby limiting the sliding of the buoyancy system 3 and the movable truss 4 inside the fixed truss 1.

[0047] The guide wheel 21 in the embodiment is made of nylon, which is wear-resistant, corrosion-resistant and insulating, and has a protective effect on the chord of the movable truss 4. One side of the guide wheel base 22 is arc-shaped to increase the contact area with the web, and the other side is provided with a waist-shaped hole for installing the guide wheel 21 and the guide wheel shaft 23. The guide wheel shaft 23 is a shaft part supporting the rotation of the guide wheel 21. The jam screw 24 is used to adjust the gap between the movable truss 4 and the fixed truss 1, ensuring smooth sliding. The design of the guide mechanism 2 effectively limits the movement trajectory of the movable truss 4, improving the stability and reliability of the sliding process, and the adjustment function of the jam screw 24 further enhances the adaptability and flexibility of the device.

[0048] Specifically, eight guide mechanisms 2 are respectively welded in the inner sides of the two webs of the top latch truss 12. The guide mechanisms 2 are arranged at intervals, which helps to improve the stability of the sliding process of the movable truss 4. One side of the guide wheel base 22 is arc-shaped to increase the contact area with the web. The other side of the guide wheel base 22 is provided with a waist-shaped hole for installing the guide wheel 21 and the guide wheel shaft 23. The guide wheel 21 is made of nylon, which has the advantages of good wear resistance, corrosion resistance and insulation, and also has a protective effect on the chord of the movable truss 4. The gap between the movable truss 4 and the fixed truss 1 can be adjusted by the jam screw 24.

[0049] As shown in Figure 4and Figure 5 As shown in the figure, the buoyancy system 3 in this embodiment serves as the core component for driving the movement of the movable truss 4, and its design fully considers the buoyancy stability and structural strength. Its structure includes multiple middle-hole through floating balls 31, spacer rings 32, connecting rods 33, support plates 34, compression plates 35, stainless steel chains 36, and quick couplings 37. The buoyancy system 3 is installed at the bottom of the movable truss 4 and is used to drive the movable truss 4 to make long-distance floating and sinking movements, while also helping to reduce the adverse effects of water surface wave environment on structural stability.

[0050] Specifically, the middle-hole through floating balls 31 are made of ABS plastic material, and their number is determined according to the calculation of net buoyancy requirements. They are arranged in staggered series on the connecting rods 33 through the spacer rings 32. The spacer rings 32 have water-permeable hole structures in the middle, with diameters close to those of the middle-hole through floating balls 31, effectively transferring buoyancy to the movable truss 4. The connecting rods 33 are hollow structures, with one end connected to the support plates 34 and the other end connected to the compression plates 35, and the stainless steel chains 36 pass through the inside. The support plates 34 and the compression plates 35 are located at both ends of the connecting rods 33, respectively, serving as support and compression, ensuring the stability of the structure of the buoyancy system 3.

[0051] The stainless steel chains 36 not only have high strength and corrosion resistance, but also have a large density and thick chain diameter, ensuring that the chains will not knot or entangle during the extension and contraction of the movable truss 4 due to water flow or external forces, thereby ensuring the stable operation of the device. One end of the chain is connected to the base 11 of the fixed truss 1, and the other end is connected to the movable truss 4 through the quick coupling 37, achieving reliable connection between the two.

[0052] The quick coupling 37, as a key component connecting the stainless steel chain 36 and the movable truss 4, allows the effective length of the chain to be easily adjusted. This not only simplifies the installation and debugging process of the device, but also makes the device more adaptable to different water depths. By adjusting the quick coupling 37, the operator can easily change the extension distance of the movable truss 4 to meet different test requirements.

[0053] The design of the buoyancy system 3 fully considers practicality and stability. The combination of stainless steel chains 36 and quick couplings 37 not only ensures the reliable connection between the movable truss 4 and the fixed truss 1, but also improves the adaptability and flexibility of the device. This design enables the device to maintain stable operation in deep water environments while reducing maintenance costs and operational difficulties.

[0054] As Figure 1As shown, the movable truss 4 in this embodiment serves as the retractable part of the device, and its design also focuses on lightweight and structural strength. Its structure includes the pin truss 41, the pin assembly 42, the top plate 43, and the top hanging rack 44. The main body of the movable truss 4 is also composed of pin trusses 41 made of aluminum alloy material arranged in series, and its cross-sectional size is slightly smaller than that of the fixed truss 1, so it can be nested inside the fixed truss 1.

[0055] Specifically, the pin truss 41 is similar to the pin truss 12 of the fixed truss 1, made of aluminum alloy material and treated on the surface to prevent water erosion. The pin trusses 41 are connected by the pin assemblies 42 to form a retractable structure. The pin assembly 42 is used to connect the pin trusses 41 to realize the retracting function of the movable truss 4. The design of the pin assembly 42 enables the movable truss 4 to remain stable during retraction, while facilitating assembly and disassembly.

[0056] The top plate 43 is located at the top of the movable truss 4, which is used to install the top hanging rack 44 to facilitate the arrangement of test equipment, and also serves as a physical limiting device for the sinking movement of the movable truss 4 to prevent excessive sinking of the movable truss 4.

[0057] The top hanging rack 44 is similar to the hanging rack 15 of the fixed truss 1, used to install test equipment such as underwater lights, control boxes, and underwater cameras. The design of the top hanging rack 44 enables the device to easily arrange test equipment under different water depth conditions.

[0058] The design of the movable truss fully considers the requirements of lightweight and structural strength. The use of aluminum alloy material reduces the overall weight, and the design of the pin assembly 42 improves the assembly flexibility and structural stability. The design of the top plate not only increases the versatility of the device, but also improves the safety. Overall, the design of the movable truss enables the device to operate stably in deep water environment, while meeting different test requirements.

[0059] The specific working principle and process of this embodiment are as follows:

[0060] When conducting deep water tests, the operator first adjusts the effective length of the stainless steel chain 36 according to the working height requirements of the test, and locks it through the quick link 37. Then, the false bottom platform starts to descend from the water surface to the set position. In this process, the middle hole through floating ball 31 of the buoyancy system 3 will be immersed in water one by one. When the net buoyancy provided by the buoyancy system is sufficient to overcome the weight of the movable truss 4 and the friction, the buoyancy system and the movable truss will slide relative to the fixed truss 1. Under the guidance of the guide mechanism 2, the movable truss moves upward along the fixed truss and extends until the stainless steel chain is completely straightened.

[0061] After the end of the test, the false bottom platform gradually rises to the water surface. The middle hole of the buoyancy system is exposed to the water surface one by one, and the net buoyancy provided by it is continuously reduced. At this time, the buoyancy system and the movable truss rely on the self-weight to gradually complete the contraction, and are physically limited by the top plate 43. During the whole process, the device relies on the change of buoyancy to drive the movable truss to make long-distance floating and sinking movement, without external power or hydraulic energy and other mechanical components.

[0062] The present application has the following effects:

[0063] Adopting buoyancy drive: the present application adopts a buoyancy system as a driving mechanism, and utilizes the change of buoyancy to drive the movable truss to make long-distance floating and sinking movement. This design does not require external power or hydraulic energy and other mechanical components, solves the problems of poor deep water environment adaptability and low long-term use reliability. At the same time, the buoyancy driving mode also reduces the energy consumption and maintenance cost of the device.

[0064] Increasing the telescopic distance: by designing a multi-stage telescopic buoyancy system and movable truss, the long-distance telescopic function is realized. The effective length of the stainless steel chain can be adjusted by the quick link, further increasing the flexibility of telescoping. This makes the device meet the test requirements under different water depth conditions.

[0065] Reducing construction and maintenance costs: the whole device has no motor, oil pump and other mechanical components, and the structure is relatively simple. This not only reduces the manufacturing cost of the device, but also reduces the difficulty of maintenance and maintenance. At the same time, the use of aluminum alloy and stainless steel materials also improves the corrosion resistance and service life of the device.

[0066] Reducing the influence of water surface wave environment: the buoyancy system is installed at the bottom of the movable truss. When the device is fully deployed, the buoyancy system is far away from the water surface, thereby reducing the adverse effects of the water surface wave environment on the structural stability. This makes the device maintain stable operation in deep water environment, improves the accuracy and reliability of the test.

[0067] Improving test efficiency: the telescopic function of the device makes it more convenient and efficient to arrange test equipment under different water depth conditions. The operator can quickly adjust the telescopic distance and height of the device according to the test requirements, thereby improving the test efficiency. At the same time, the stability and reliability of the device also ensure the accuracy and credibility of the test results.

[0068] In summary, the buoyancy-driven telescopic device for deep water pool provided by the present application has significant technical characteristics and advantages. It not only solves the problem of poor deep water environment adaptability and difficulty in realizing long-distance extension and contraction of the telescopic device in the prior art, but also improves the stability, reliability and test efficiency of the device. At the same time, the device also has the advantages of simple structure, low cost, convenient maintenance, etc., and has wide application prospect and promotion value.

[0069] The above description is an explanation of the present application, not a limitation of the present application, the scope of the present application is defined by the claims, within the scope of the present application, any form of modification can be made.

Claims

1. A buoyancy-driven retractable device for deep-water pools, characterized in that, include: Fixed trusses serve as the basic support structure for the entire device; The guiding mechanism, installed inside the fixed truss, is used to limit the sliding path of the buoyancy system and the movable truss within the fixed truss; The buoyancy system, installed at the bottom of the movable truss, is used to drive the movable truss to make long-distance upward and downward movements; The movable truss, as the telescopic part of the device, is nested with the fixed truss and its telescopic movement is driven by a buoyancy system. The device achieves long-distance upward and downward movement of the movable truss by changing buoyancy, without relying on external electric or hydraulic energy.

2. The buoyancy-driven retractable device for deep-water pools according to claim 1, characterized in that, The fixed truss includes a base, a pin truss, a pin assembly, eye bolts, and a hanging rack. The pin trusses are arranged in series to form the main body of the fixed truss. The base is fixedly connected to the lifting false bottom platform of the water tank. The eye bolts are installed at the center of the base steel plate to connect the fixed truss and the movable truss. The hanging rack is arranged on the web of the pin truss to facilitate the arrangement of test equipment.

3. A buoyancy-driven retractable device for deep-water pools according to claim 2, characterized in that, The base is made of stainless steel, with a truss structure of square cross-section as the main body and a square steel plate at the bottom. Support legs are welded between the truss chords and the steel plate to improve the structural strength and rigidity.

4. A buoyancy-driven retractable device for deep-water pools according to claim 2, characterized in that, The pin truss is made of high-strength aluminum alloy, and the surface is hard anodized and then sprayed with epoxy resin. The connection between the pin trusses and between them and the base is through pin assemblies, which facilitates assembly and disassembly.

5. A buoyancy-driven retractable device for deep-water pools according to claim 1, characterized in that, The guiding mechanism includes a guide wheel, a guide wheel base, a guide wheel shaft, and a stop screw. The guide wheel is made of nylon. One side of the guide wheel base is arc-shaped to increase the contact area with the web member, and the other side has a waist-shaped hole for installing the guide wheel and the guide wheel shaft. The stop screw is used to adjust the gap between the movable truss and the fixed truss.

6. A buoyancy-driven retractable device for deep-water pools according to claim 1, characterized in that, The buoyancy system includes multiple through-hole buoys, spacer rings, connecting rods, support plates, pressure plates, stainless steel chains, and quick-connect rings. The through-hole buoys are arranged in a staggered series on the connecting rods through spacer rings. One end of the connecting rod is connected to the support plate, and the other end is connected to the pressure plate. The stainless steel chain passes through the inside of the connecting rod, with one end connected to the fixed truss base and the other end connected to the movable truss through the quick-connect ring.

7. A buoyancy-driven retractable device for deep-water pools according to claim 6, characterized in that, The centrally pierced float is made of ABS plastic, and the number is determined by calculation based on the net buoyancy requirements. The spacer ring has a water-permeable hole structure in the middle to effectively transfer buoyancy to the movable truss.

8. A buoyancy-driven retractable device for deep-water pools according to claim 1, characterized in that, The movable truss includes a pin truss, a pin assembly, a top plate, and a top hanging rack. The main body of the movable truss is composed of pin trusses made of aluminum alloy arranged in series. The cross-sectional size is slightly smaller than that of the fixed truss and can be nested inside the fixed truss. The top plate is located at the top of the movable truss and is used to install the top hanging rack and as a physical limiting device.

9. A buoyancy-driven retractable device for deep-water pools according to claim 8, characterized in that, The pin trusses are connected by pin assemblies to form a telescopic structure. The design of the pin assemblies enables the movable trusses to remain stable during the telescopic process, while also facilitating assembly and disassembly.

10. A buoyancy-driven retractable device for deep-water pools according to claim 1, characterized in that, The working principle of the device is as follows: by adjusting and locking the effective length of the stainless steel chain, when the false bottom platform descends, the central through-hole float of the buoyancy system is submerged in the water, providing net buoyancy to overcome the self-weight and friction of the movable truss, so that the movable truss moves upward along the fixed truss under the guidance of the guide mechanism; when the false bottom platform rises, the float is exposed above the water surface, the net buoyancy decreases, and the movable truss gradually contracts by its own weight, and is physically limited by the top plate.

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