Buoyancy-driven telescopic device for deepwater pool

Abstract

The invention relates to a buoyancy-driven telescopic device for a deepwater pool, which comprises a fixed truss serving as a basic support structure of the whole device; the guide mechanism is mounted in the fixed truss and used for limiting the sliding path of the buoyancy system and the movable truss in the fixed truss; the buoyancy system is mounted at the bottom of the movable truss and used for driving the movable truss to float and sink for a long distance; the movable truss is used as a telescopic part of the device, is nested with the fixed truss and is driven by a buoyancy system to realize telescopic motion; according to the device, long-distance floating and sinking movement of the movable truss is achieved through buoyancy changes, external electric power or hydraulic energy is not needed, the structure is compact and reasonable, operation is convenient, the buoyancy system is used as a driving mechanism, and external electric power or hydraulic energy is not needed; therefore, the problems of low deepwater environment adaptability and low long-term use reliability are solved, and meanwhile, the energy consumption and the maintenance cost are reduced.

Description

Technical Field

[0001] The invention relates to the technical field of water pool testing, in particular to a buoyancy-driven retractable device used in a deep water pool. Background Art

[0002] Conducting model tests in deep-water tanks is an important part of ship and ocean engineering technology research. During the tests, it is often necessary to consider the impact of water depth and environmental factors such as wind, waves, and currents on the test results. Generally speaking, in order to accurately simulate the different water depths corresponding to the test conditions according to the model scale ratio, the deep-water tank will be equipped with a large-area false bottom platform with a height lifting function. During the test, the false bottom platform is raised and lowered to the set position according to the test needs, and its upper surface is the test water depth. In order to arrange auxiliary light sources, high-speed cameras and other test equipment under different water depths, a fixed-height truss device is usually installed on the lifting false bottom platform of the deep-water tank.

[0003] When conducting deep water tests in deep water pools, the water depth of the false bottom platform is generally more than 20 meters, and can even reach more than 30 meters. Due to the height restrictions of closed pool buildings and considerations such as safety of use, the height of the fixed truss device cannot meet the technical requirements of deep water tests. Therefore, the development of 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 rods, cylinders, hydraulic cylinders, etc., and in order to adapt to different water depth environments, the design of its mechanical and electrical structure is relatively complex, and it will face problems such as short retractable distance, low long-term reliability, and high construction and maintenance costs. The main problems include the following:

[0004] Adaptability to deepwater environments: Due to factors such as water pressure and corrosion, traditional retractable devices have complex mechanical and electrical structure designs and low long-term reliability in deepwater environments.

[0005] Limited retractable distance: Existing retractable devices often face the problem of short retractable distance, which makes it difficult to meet the technical requirements of deep water tests.

[0006] High construction and maintenance costs: Traditional retractable devices require the use of electric push rods, cylinders, hydraulic cylinders and other driving mechanisms. These mechanical components require regular maintenance and have high manufacturing costs.

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

[0008] To this end, we propose a buoyancy-driven retractable device for deep water tanks. Summary of the invention

[0009] In response to the shortcomings of the above-mentioned existing production technology, the applicant provides a buoyancy-driven retractable device for deep-water pools, which uses a buoyancy system as a driving mechanism and does not require external electricity or hydraulic energy, thereby solving the problems of low adaptability to deep-water environments and long-term reliability, while reducing energy consumption and maintenance costs.

[0010] The technical solution adopted by the present invention is as follows:

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

[0012] Fixed trusses, serving as the basic supporting structure of the entire device;

[0013] A guide mechanism, installed inside the fixed truss, for limiting the sliding path of the buoyancy system and the movable truss inside the fixed truss;

[0014] The buoyancy system is installed at the bottom of the movable truss and is used to drive the movable truss to float up and down over a long distance;

[0015] The movable truss, as the retractable part of the device, is nested with the fixed truss and is driven by the buoyancy system to achieve telescopic movement;

[0016] The device achieves long-distance rising and sinking movements of the movable truss through changes in buoyancy without relying on external electricity or hydraulic energy.

[0017] Furthermore, the fixed truss includes a base, a latch truss, a latch assembly, a lifting eye screw and a hanging rack. The latch trusses are arranged in series to form a fixed truss body. The base is fixedly connected to the pool lifting false bottom platform. The lifting eye screw is 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 latch truss to facilitate the arrangement of test equipment.

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

[0019] Furthermore, the latch truss is made of high-strength aluminum alloy, the surface is hard-anodized and then sprayed with epoxy resin, and the connection between the latch trusses and the base is through a latch assembly, which is easy to assemble and disassemble.

[0020] Furthermore, the guide mechanism includes a guide wheel, a guide wheel base, a guide wheel shaft and a plug 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, and the other side is provided with a waist-shaped hole for installing the guide wheel and the guide wheel shaft. The plug screw is used to adjust the gap between the movable truss and the fixed truss.

[0021] Furthermore, the buoyancy system includes a plurality of center-hole through-core floats, spacer rings, connecting rods, support plates, clamping plates, stainless steel chains and quick-connect rings. The center-hole through-core floats are arranged in series on the connecting rods in an alternating manner through spacer rings. One end of the connecting rod is connected to the support plate, and the other end is connected to the clamping plate. The stainless steel chain passes through the inside of the connecting rod, one end is connected to the fixed truss base, and the other end is connected to the movable truss through a quick-connect ring.

[0022] Furthermore, the center-hole through-buoy is made of ABS plastic material, and the number is determined by calculation based on the net buoyancy requirement. A water-permeable hole structure is provided in the middle of the spacer ring to effectively transfer the buoyancy to the movable truss.

[0023] Furthermore, the movable truss includes a latch truss, a latch assembly, a top plate and a top hanging rack. The movable truss body is composed of latch trusses made of aluminum alloy arranged in series. The cross-sectional size is slightly smaller than the fixed truss and can be nested inside the fixed truss. The top plate is located on the top of the movable truss and is used to install the top hanging rack and serve as a physical limiting device.

[0024] Furthermore, the latch trusses are connected by latch assemblies to form a retractable structure. The design of the latch assemblies enables the movable trusses to remain stable during the retraction process and is easy to assemble and disassemble.

[0025] Furthermore, the working principle of the device is as follows: by adjusting the effective length of the stainless steel chain and locking it, when the false bottom platform descends, the center-hole through-hole float of the buoyancy system is immersed in the water, providing net buoyancy to overcome the deadweight 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 emerges from the water surface, the net buoyancy is reduced, and the movable truss gradually shrinks by relying on its own weight, and physical limitation is achieved by the top plate.

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

[0027] The present invention has a compact and reasonable structure and is easy to operate. By utilizing the buoyancy system as a driving mechanism, no external electricity or hydraulic energy is required, thereby solving the problems of low adaptability to deep-water environments and low reliability in long-term use, while reducing energy consumption and maintenance costs. Secondly, through the multi-stage retractable design, the device realizes a long-distance retractable function, enhances its applicability under different water depth conditions, and improves test efficiency. The device has a simple structure and is free of mechanical components such as motors and oil pumps, which reduces construction and maintenance costs, and improves corrosion resistance and service life. Moreover, the buoyancy system is installed at the bottom of the movable truss, which reduces the adverse effects of surface waves on structural stability, ensures the stable operation of the device in a deep-water environment, and improves the accuracy and reliability of the test. In summary, the device not only solves many problems in the prior art, but also demonstrates significant technical advantages and application prospects, and has broad promotion value.

[0028] At the same time, the present invention also has the following advantages:

[0029] Buoyancy drive: The present invention uses a buoyancy system as a driving mechanism, and utilizes buoyancy changes to drive the movable truss to float and sink over long distances. This design does not require mechanical components such as external electricity or hydraulic energy, and solves the problems of low adaptability to deep-water environments and long-term reliability. At the same time, the buoyancy drive method also reduces the energy consumption and maintenance costs of the device.

[0030] Increase the retractable distance: By designing a multi-stage retractable buoyancy system and a movable truss, a long-distance retractable function is achieved. The effective length of the stainless steel chain can be adjusted through a quick-release ring, further increasing the flexibility of the retractable. This allows the device to meet test requirements under different water depth conditions.

[0031] Reduce construction and maintenance costs: The entire device does not have mechanical parts such as motors and oil pumps, and the structure is relatively simple. This not only reduces the manufacturing cost of the device, but also reduces the difficulty of maintenance and upkeep. At the same time, the use of materials such as aluminum alloy and stainless steel also improves the corrosion resistance and service life of the device.

[0032] Reduce the impact of surface wave environment: The buoyancy system is installed at the bottom of the active truss. When the device is fully deployed, the buoyancy system is far away from the water surface, thereby reducing the adverse impact of the surface wave environment on the stability of the structure. This allows the device to maintain stable operation in a deep water environment and improves the accuracy and reliability of the test.

[0033] Improve test efficiency: The retractable function of the device makes it easier and faster to arrange the test equipment under different water depths. The operator can quickly adjust the retractable 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 THE DRAWINGS

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

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

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

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

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

[0039] In the figure: 1. fixed truss; 11. base; 12. latch truss; 13. latch assembly; 14. eye 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. center hole through-hole float; 32. spacer ring; 33. connecting rod; 34. support plate; 35. clamping plate; 36. stainless steel chain; 37. quick connector; 4. movable truss; 41. latch truss; 42. latch assembly; 43. top plate; 44. top hanging rack. DETAILED DESCRIPTION

[0040] The specific implementation of the present invention is described below in conjunction with the accompanying drawings.

[0041] like Figure 1-5 As shown, this embodiment discloses a buoyancy-driven retractable device for a deep water pool, and its structure includes a fixed truss 1, a guide mechanism 2, a buoyancy system 3 and a movable truss 4. The present invention proposes an innovative buoyancy-driven retractable device, which aims to achieve long-distance floating and sinking movement of the movable truss through buoyancy changes, without relying on external electricity or hydraulic energy, and has the advantages of simple structure, low cost, and easy maintenance. The following is a comprehensive description of the detailed implementation plan of the device.

[0042] Among them, Figure 1 As shown, the fixed truss 1 in this embodiment serves as the basic supporting structure of the entire device, and its design fully considers the requirements of use height and light weight, and includes a base 11, a latch truss 12, a latch assembly 13, a lifting eye screw 14, and a hanging rack 15. In order to meet the requirements of use height and light weight, the main body of the fixed truss 1 is composed of a plurality of latch trusses 12 of the same specification arranged in series.

[0043] Specifically, the base 11 is made of stainless steel, and the main body is a truss structure with a square cross-section, and the bottom is a square steel plate. Support feet are welded between the truss chord of the base 11 and the steel plate to improve the structural strength and rigidity. The base 11 is fixedly connected to the pool lifting false bottom platform by welding, screw connection, etc., and a lifting eye screw 14 is installed at the center of the steel plate. The lifting eye screw 14 is a key component connecting the fixed truss 1 and the movable truss 4, and can be connected to the movable truss 4 through a quick connector 37 and a 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 setting of the lifting eye screw simplifies the connection process and improves the installation efficiency.

[0044] The latch truss 12 in this embodiment is made of high-strength aluminum alloy, and the surface is hard anodized and then sprayed with epoxy resin to prevent it from being eroded by water. The connection between the latch trusses 12 and the base 11 is achieved through the latch assembly 13, which is convenient for assembly and disassembly. The aluminum alloy material reduces the overall weight, the hard anodizing and epoxy resin coating enhance the anti-corrosion performance, 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 to achieve a stable construction of the fixed truss 1.

[0045] The object hanger 15 in this embodiment is arranged on the web of the latch truss 12, and can be installed at different heights according to the test requirements, so as to facilitate the arrangement of test equipment such as underwater lights, control boxes, and underwater cameras under different water depths. The design of the object hanger 15 improves the versatility and flexibility of the device, and facilitates the arrangement of test equipment under different water depths.

[0046] like Figure 2 and Figure 3 As shown, the guide mechanism 2 in this 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 to ensure smooth movement. Its structure includes a guide wheel 21, a guide wheel base 22, a guide wheel shaft 23, and a plug screw 24. The guide mechanism 2 is installed inside the fixed truss 1, thereby limiting the buoyancy system 3 and the movable truss 4 from sliding inside the fixed truss 1.

[0047] The guide wheel 21 in this embodiment is made of nylon, which has good wear resistance, corrosion resistance and insulation, 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; 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 an axial component that supports the rotation of the guide wheel 21. The plug screw 24 is used to adjust the gap between the movable truss 4 and the fixed truss 1 to ensure smooth sliding. The design of the guide mechanism 2 effectively limits the movement trajectory of the movable truss 4, improves the stability and reliability of the sliding process, and the adjustment function of the plug screw 24 further enhances the adaptability and flexibility of the device.

[0048] Specifically, eight guide mechanisms 2 are welded on the inner side 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 movable truss 4 during the sliding process. One side of the guide wheel base 22 is arc-shaped, which is used to increase the contact area with the web. A waist-shaped hole is provided on the other side of the guide wheel base 22 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 at the same time protects the chord of the movable truss 4. The gap between the movable truss 4 and the fixed truss 1 can be adjusted by plugging the screw 24.

[0049] like Figure 4and Figure 5 As shown, the buoyancy system 3 in this embodiment is the core component for driving the movable truss 4 to move, and its design fully considers the buoyancy stability and structural strength. Its structure includes a plurality of center-hole through-the-core buoys 31, a spacer ring 32, a connecting rod 33, a support plate 34, a clamping plate 35, a stainless steel chain 36, and a quick-connect ring 37. The buoyancy system 3 is installed at the bottom of the movable truss 4 to drive the movable truss 4 to float and sink over a long distance, and at the same time helps to reduce the adverse effects of the surface wave environment on the structural stability.

[0050] Specifically, the center hole through-the-core float 31 is made of ABS plastic material, and the number is determined by calculation according to the net buoyancy requirement, and is arranged in series on the connecting rod 33 through the spacer ring 32. A water-permeable hole structure is provided in the middle of the spacer ring 32, and the diameter is close to that of the center hole through-the-core float 31, which effectively transmits the buoyancy to the movable truss 4. The connecting rod 33 is a hollow structure, one end of which is connected to the support plate 34, and the other end is connected to the clamping plate 35, and the stainless steel chain 36 passes through the inside. The support plate 34 and the clamping plate 35 are respectively located at both ends of the connecting rod 33, which play a supporting and clamping role to ensure the stability of the structure of the buoyancy system 3.

[0051] The stainless steel chain 36 is not only high in strength and corrosion-resistant, but also has a high density and a thick chain link diameter, which ensures that the chain will not be knotted or entangled due to water flow or external force during the extension and contraction of the movable truss 4, 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 a quick connector 37, achieving a reliable connection between the two.

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

[0053] The design of the buoyancy system 3 takes full consideration of practicality and stability. The combination of the stainless steel chain 36 and the quick-connect ring 37 not only ensures a 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 a deep-water environment while reducing maintenance costs and operational difficulties.

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

[0055] Specifically, the latch truss 41 is similar to the latch truss 12 of the fixed truss 1, and is made of aluminum alloy, and the surface is treated to prevent water erosion. The latch trusses 41 are connected by latch assemblies 42 to form a retractable structure. The latch assemblies 42 are used to connect the latch trusses 41 to achieve the telescopic function of the movable truss 4. The design of the latch assemblies 42 enables the movable truss 4 to remain stable during the telescopic process, and is easy to assemble and disassemble.

[0056] The top plate 43 is located at the top of the movable truss 4. On the one hand, it is used to install the top hanging rack 44 to facilitate the arrangement of test equipment; on the other hand, it serves as a physical limit device for the sinking movement of the movable truss 4 to prevent the movable truss 4 from excessively sinking.

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

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

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

[0060] When conducting a deep water test, 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 with the quick-connect ring 37. Then, the false bottom platform begins to descend from the water surface to the set position. During this process, the center-hole through-buoy balls 31 of the buoyancy system 3 will be immersed in the water one by one. When the net buoyancy provided by the buoyancy system is sufficient to overcome the deadweight and friction of the movable truss 4, 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 stretches until the stainless steel chain is fully straightened.

[0061] After the test, the false bottom platform gradually rises to the water surface. The center-hole through-buoys of the buoyancy system then emerge from the water one by one, and the net buoyancy they provide is continuously reduced. At this time, the buoyancy system and the movable truss gradually shrink by their own weight, and are physically limited by the top plate 43. During the whole process, the device drives the movable truss to float and sink over long distances by the change of buoyancy, without the need for mechanical components such as external electricity or hydraulic energy.

[0062] The present invention has the following effects:

[0063] Buoyancy drive: The present invention uses a buoyancy system as a driving mechanism, and utilizes buoyancy changes to drive the movable truss to float and sink over long distances. This design does not require mechanical components such as external electricity or hydraulic energy, and solves the problems of low adaptability to deep-water environments and long-term reliability. At the same time, the buoyancy drive method also reduces the energy consumption and maintenance costs of the device.

[0064] Increase the retractable distance: By designing a multi-stage retractable buoyancy system and a movable truss, a long-distance retractable function is achieved. The effective length of the stainless steel chain can be adjusted through a quick-release ring, further increasing the flexibility of the retractable. This allows the device to meet test requirements under different water depth conditions.

[0065] Reduce construction and maintenance costs: The entire device does not have mechanical parts such as motors and oil pumps, and the structure is relatively simple. This not only reduces the manufacturing cost of the device, but also reduces the difficulty of maintenance and upkeep. At the same time, the use of materials such as aluminum alloy and stainless steel also improves the corrosion resistance and service life of the device.

[0066] Reduce the impact of surface wave environment: The buoyancy system is installed at the bottom of the active truss. When the device is fully deployed, the buoyancy system is far away from the water surface, thereby reducing the adverse impact of the surface wave environment on the stability of the structure. This allows the device to maintain stable operation in a deep water environment and improves the accuracy and reliability of the test.

[0067] Improve test efficiency: The retractable function of the device makes it easier and faster to arrange the test equipment under different water depths. The operator can quickly adjust the retractable 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 retractable device for deep-water pools provided by the present invention has significant technical features and advantages. It not only solves the problem that the retractable device in the prior art has poor adaptability to deep-water environments and is difficult to achieve long-distance extension and contraction, 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, and easy maintenance, and has broad application prospects and promotion value.

[0069] The above description is an explanation of the present invention, not a limitation of the present invention. The scope of the present invention is defined in the claims. Any form of modification may be made within the scope of protection of the present invention.

Claims

1. A buoyancy-driven retractable device for a deep water pool, characterized in that: include: Fixed trusses, serving as the basic supporting structure of the entire device; A guide mechanism, installed inside the fixed truss, for limiting the sliding path of the buoyancy system and the movable truss inside the fixed truss; The buoyancy system is installed at the bottom of the movable truss and is used to drive the movable truss to float up and down over a long distance; The movable truss, as the retractable part of the device, is nested with the fixed truss and is driven by the buoyancy system to achieve telescopic movement; The device achieves long-distance rising and sinking movements of the movable truss through changes in buoyancy without relying on external electricity or hydraulic energy.

2. A buoyancy-driven retractable device for a deep water pool according to claim 1, characterized in that: The fixed truss includes a base, a latch truss, a latch assembly, a lifting eye screw and a hanging rack. The latch trusses are arranged in series to form a fixed truss body. The base is fixedly connected to the pool lifting false bottom platform. The lifting eye screw is 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 latch truss to facilitate the arrangement of test equipment.

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

4. A buoyancy-driven retractable device for a deep water pool according to claim 2, characterized in that: The latch truss is made of high-strength aluminum alloy, and its surface is hard-anodized and then sprayed with epoxy resin. The connections between the latch trusses and between the latch trusses and the base are all through latch assemblies, which is convenient for assembly and disassembly.

5. A buoyancy-driven retractable device for a deep water pool according to claim 1, characterized in that: The guide mechanism includes a guide wheel, a guide wheel base, a guide wheel shaft and a plug 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, and the other side is provided with a waist-shaped hole for installing the guide wheel and the guide wheel shaft. The plug screw is used to adjust the gap between the movable truss and the fixed truss.

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

7. A buoyancy-driven retractable device for a deep water pool according to claim 6, characterized in that: The center-hole through-buoy is made of ABS plastic material, and the number is determined by calculation based on the net buoyancy requirement. A water-permeable hole structure is provided in the middle of the spacer ring to effectively transfer the buoyancy to the movable truss.

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

9. A buoyancy-driven retractable device for a deep water pool according to claim 8, characterized in that: The latch trusses are connected by latch assemblies to form a retractable structure. The design of the latch assemblies enables the movable trusses to remain stable during the retraction process and is convenient for assembly and disassembly.

10. A buoyancy-driven retractable device for a deep water pool according to claim 1, characterized in that: The working principle of the device is as follows: by adjusting the effective length of the stainless steel chain and locking it, when the false bottom platform descends, the center-hole through-buoy ball of the buoyancy system is immersed in the water, providing net buoyancy to overcome the deadweight 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 buoy ball is exposed to the water surface, the net buoyancy is reduced, the movable truss gradually shrinks by its own weight, and the top plate realizes physical limitation.

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