Gas lift water pool experimental device

Abstract

The application discloses a gas lift lifting pool experimental device, which comprises a water surface truss, an extensible pipe support, a bend pipe, a rotating mechanism, a lifting pipe, a feeding pipe and a gas injection mechanism. The upper bracket mechanism and the lower bracket mechanism are arranged on the upper and lower ends of the extensible pipe support respectively, so that the connecting flanges on the bend pipe and the lifting pipe are vertically limited and supported. When the lifting pipe needs to be increased, the uppermost lifting pipe and the bend pipe are rotated and separated from the extensible pipe support through the rotating mechanism, the lower end of the new lifting pipe can be connected with the lifting pipe on the lower platform and then lowered to the pool, and the upper end of the new lifting pipe can be limited through the upper bracket mechanism on the upper platform, so that the lifting pipe at the end of the bend pipe can be connected with the upper end of the new lifting pipe when returning, thereby realizing the increase of the length of the lifting pipe and effectively improving the installation and dismounting efficiency of the lifting pipe.

Description

Technical Field

[0001] This invention relates to the field of mining experimental technology, specifically to an air lift lifting water tank experimental device. Background Technology

[0002] With the continuous development of the world economy, modern industry's demand for mineral resources is increasing, and extensive resource development is leading to the depletion of terrestrial mineral resources. As a mineral resource base, the ocean is receiving increasing attention from countries around the world, and opening up new resource supply channels as soon as possible has become a common choice for all nations. Therefore, the exploitation and enhancement of deep-sea mineral resources, as a core technology for acquiring marine mineral resources, is attracting increasing attention and research from experts and scholars.

[0003] Currently, in order to reduce the research and development cost of deep-sea mining systems, nodule ore lifting experiments are used to simulate the operation of deep-sea mining systems. Existing nodule ore lifting experiments are mainly carried out by lifting nodule ore from a water tank. For different water depths, multiple sections of lifting pipes need to be connected to adjust the length. Since the lifting pipes are mainly connected by flanges and the lengths of the lifting pipes are different (4 meters, 2 meters, and 1 meter), adding a lifting pipe requires lifting all the lifting pipes out of the water tank, which effectively reduces the efficiency of adding and disassembling the lifting pipes. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of the aforementioned technologies by proposing an air-lift lifting water tank experimental device, which aims to solve the problems mentioned above.

[0005] This invention provides an air-lift lifting tank experimental device, including a water surface truss, a telescopic pipe frame, a bend, a rotating mechanism, a lifting pipe, a feeding pipe, and an air injection mechanism. The bend is rotatably mounted on the water surface truss via the rotating mechanism. The lifting pipe consists of multiple segments connected by connecting flanges. The lifting pipe is vertically connected to the end of the bend, and the lower end of the lifting pipe is connected to an underwater silo. One end of the feeding pipe is fixed to the water surface truss, and the other end is connected to the underwater silo. The air injection mechanism is mounted on the water surface truss and communicates with the lower part of the lifting pipe. The device also includes an upper support mechanism for limiting the connecting flange on the bend and a lower support mechanism for limiting the connecting flange on the lifting pipe. The upper support mechanism is located on the upper side of the telescopic pipe frame, and the lower support mechanism is located on the lower side of the telescopic pipe frame.

[0006] Furthermore, the rotating mechanism includes a rotating frame and a rotating motor. The rotating frame is rotatably mounted on the upper end of the water surface truss, and the rotating motor is mounted on the water surface truss. The output end of the rotating motor is connected to the rotating frame, and the bent pipe is fixed to the rotating frame. The air injection mechanism includes an air compressor and an air injection pipe. The air compressor is mounted on the water surface truss, one end of the air injection pipe is connected to the output end of the air compressor, and the other end of the air injection pipe is connected to the lower part of the lift pipe. The telescopic pipe frame includes an upper platform plate and a lower platform plate with horizontal openings, as well as an electric telescopic rod. The upper platform plate and the lower platform plate are connected by the electric telescopic rod, and the lower platform plate is fixed to the water surface truss. An upper support mechanism is mounted on the upper platform plate, and a lower support mechanism is mounted on the lower platform plate. The upper support mechanism is connected to the lower support mechanism via a linkage assembly.

[0007] Furthermore, the upper support mechanism includes an upper guide member with an opening, a first upper support member, and a second upper support member. The upper guide member is rotatably disposed within an upper circular hole in the upper platform, and the first and second upper support members are slidably disposed within the upper circular hole. The first and second upper support members are provided with a first guide protrusion, and the upper guide member is provided with a first guide groove, with the first guide protrusion located within the first guide groove. The upper guide member is provided with a ring gear with a notch, which is connected to the linkage assembly for transmission. The upper guide member rotates to cause the first guide groove to drive the first and second upper support members to perform linear telescopic movement, thereby adjusting the diameter of the circle formed by the first and second upper support members. The lower support mechanism includes a drive motor, a lower guide member, a first lower support member, and a second lower support member. The drive motor is mounted on the lower platform. The lower guide member is rotatably mounted in the lower circular hole of the lower platform. The first and second lower support members are slidably mounted in the lower circular hole. The first and second lower support members are provided with second guide protrusions, and the lower guide member is provided with a second guide groove. The second guide protrusions are located in the second guide groove. The lower guide member is provided with a ring of teeth, which mesh with the output end of the drive motor and the linkage assembly, respectively. The lower guide member rotates to cause the second guide groove to drive the first and second lower support members to perform linear telescopic movement, thereby adjusting the diameter of the circle formed by the first and second lower support members. The first upper support member, the second upper support member, the first lower support member, and the second lower support member are provided with limiting rods, which are slidably connected to the upper and lower circular holes, respectively.

[0008] Furthermore, the linkage assembly includes a drive gear, a transmission telescopic shaft, a first transmission gear, and a second transmission gear. The transmission telescopic shaft is rotatably mounted on the upper and lower platforms. The drive gear is connected to the lower end of the transmission telescopic shaft, and the first and second transmission gears are connected to the upper end of the transmission telescopic shaft. The drive gear engages with the gear teeth for transmission, and the first transmission gear engages with the ring gear for transmission.

[0009] Furthermore, the upper platform is rotatably equipped with a rotating component for pressing the connecting flange on the bend. The rotating component has a V-shaped opening, and its upper end face has an arc-shaped rack that meshes with the second transmission gear. The lower end of the transmission telescopic shaft is equipped with a pressure sleeve for pressing the connecting flange at the lower end of the lifting pipe.

[0010] Compared with existing technologies, it has the following beneficial effects:

[0011] This invention provides an air-lift lifting tank experimental device. A telescopic pipe frame is installed on a water surface truss, with an upper support mechanism and a lower support mechanism at the upper and lower ends of the telescopic pipe frame, respectively, to provide vertical limiting support for the connecting flanges on the bend and lifting pipe. When an additional lifting pipe is needed, a rotating mechanism can rotate the uppermost lifting pipe and bend together to detach them from the telescopic pipe frame. This allows the lower end of the new lifting pipe to connect with the lifting pipe located on the lower platform and descend into the tank. The upper end of the new lifting pipe is limited by the upper support mechanism on the upper platform, allowing the lifting pipe at the bend end to connect with the upper end of the new lifting pipe upon return to its original position. This increases the length of the lifting pipe and effectively improves the installation and disassembly efficiency of the lifting pipe. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only preferred embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 This is a schematic diagram of the telescopic pipe frame of the present invention;

[0014] Figure 2 This is a partially enlarged schematic diagram of part A of the present invention;

[0015] Figure 3 This is a partially enlarged schematic diagram of part B of the present invention;

[0016] Figure 4 This is a schematic diagram of an air-lift water tank experimental device according to the present invention;

[0017] Figure 5 This is a partially enlarged schematic diagram of part C of the present invention;

[0018] Figure 6 This is an axial view of the telescopic tube frame of the present invention;

[0019] Figure 7 This is a partially enlarged schematic diagram of part D of the present invention;

[0020] Figure 8 This is a partially enlarged schematic diagram of the present invention E;

[0021] Figure 9 This is a schematic diagram of the upper bracket mechanism and the lower bracket mechanism of the present invention;

[0022] Figure 10 This is a partially enlarged schematic diagram of part F of the present invention;

[0023] Figure 11 This is a partially enlarged schematic diagram of part G of the present invention.

[0024] In the diagram, 1-Surface truss; 2-Bend; 3-Rotating mechanism; 4-Lifting pipe; 5-Feeding pipe; 6-Air injection mechanism; 7-Connecting flange; 8-Underwater hopper; 9-Rotating component; 10-Arc-shaped rack; 11-Pressure sleeve; 12-Limit rod; 21-Upper platform; 22-Lower platform; 23-Electric telescopic rod; 24-Upper circular hole; 25-Lower circular hole; 31-Upper guide component; 32-First upper support component; 33-Second upper support component; 34- 35-First guide protrusion; 36-Ring gear; 41-Rotating frame; 42-Rotating motor; 51-Drive motor; 52-Lower guide member; 53-First lower support member; 54-Second lower support member; 55-Second guide protrusion; 56-Second guide groove; 57-Tooth; 61-Drive gear; 62-Transmission telescopic shaft; 63-First transmission gear; 64-Second transmission gear; 71-Air compressor; 72-Air injection pipe. Detailed Implementation

[0025] To better understand the structure, functional features, and advantages of the present invention, preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings:

[0026] Example 1:

[0027] like Figures 1 to 11As shown, this invention provides an air-lift lifting tank experimental device, including a water surface truss 1, a telescopic pipe frame, a bend 2, a rotating mechanism 3, a lifting pipe 4, a feeding pipe 5, and an air injection mechanism 6. The bend 2 is rotatably mounted on the water surface truss 1 via the rotating mechanism 3. The lifting pipe 4 is multi-segmented and connected by connecting flanges 7. The lifting pipe 4 is vertically connected to the end of the bend 2. The lower end of the lifting pipe 4 is connected to an underwater hopper 8. Under normal operating conditions, the underwater hopper 8 is submerged, so the system's weight in the water is almost negligible, greatly improving the system's stability during operation. Simultaneously, the underwater hopper 8 provides a certain weight to stabilize the underwater system. The underwater hopper 8 has two circular openings at its top; the central opening connects to the lifting pipe 4, and the side inlet connects to the feeding pipe 5, facilitating a closed loop for cyclic lifting tests. One end of the feed pipe 5 is fixed to the surface truss 1, and the other end is connected to the underwater hopper 8. An air injection mechanism 6 is mounted on the surface truss 1 and is connected to the lower part of the riser pipe 4. The system also includes an upper support mechanism for limiting the connection flange 7 on the bend 2 and a lower support mechanism for limiting the connection flange 7 on the riser pipe 4. The upper support mechanism is located on the upper side of the telescopic pipe frame, and the lower support mechanism is located on the lower side of the telescopic pipe frame. Furthermore, the riser pipe 4 can be a flexible hose or a rigid pipe structure.

[0028] Specifically, the rotating mechanism 3 includes a rotating frame 41 and a rotating motor 42. The rotating frame 41 is rotatably mounted on the upper end of the water surface truss 1, and the rotating motor 42 is mounted on the water surface truss 1. The output end of the rotating motor 42 is connected to the rotating frame 41, and the bent pipe 2 is fixed to the rotating frame 41. The air injection mechanism 6 includes an air compressor 71 and an air injection pipe 72. The air compressor 71 is mounted on the water surface truss 1, one end of the air injection pipe 72 is connected to the output end of the air compressor 71, and the other end of the air injection pipe 72 is connected to the lower part of the lift pipe 4. The telescopic pipe frame includes an upper platform 21 with a horizontal opening, a lower platform 22, and an electric telescopic rod 23. The upper platform 21 and the lower platform 22 are connected by the electric telescopic rod 23, and the lower platform 22 is fixed to the water surface truss 1. The upper support mechanism is located on the upper platform 21, and the lower support mechanism is located on the lower platform 22. The upper support mechanism is connected to the lower support mechanism through a linkage component, so that the upper support mechanism and the lower support mechanism can be linked through the linkage component, thereby enabling the drive motor 51 to drive the upper support mechanism and the lower support mechanism to work synchronously.

[0029] Specifically, it also includes a collection hopper, which is located on the surface truss 1 and below the outlet of the bend 2. The collection hopper contains a filter screen to filter out the nodule material, and the water flows back to the pool through the opening at the lower end of the collection hopper. The bend 2 is an acrylic visual pipe used for visual observation of the material's lifting status; the end of the bend 2 is fixed to the surface truss 1 by a fixing plate. It also includes a power pump, located in the underwater silo 8, with its output end connected to the lifting pipe 4 to increase the water flow within the lifting pipe 4. It also includes a feeding hopper, located on the surface truss 1, with a feeding pipe 5 connected to its lower end, allowing simulated nodules to enter the underwater silo 8 through the feeding pipe 5. Finally, it includes a float, with the surface truss 1 mounted on it to facilitate placing the surface truss 11 on the water surface for experiments.

[0030] Example 2:

[0031] like Figures 6 to 11 As shown, in conjunction with the technical solution of Embodiment 1, in this embodiment, the upper support mechanism includes an upper guide member 31 with an opening, a first upper support member 32, and a second upper support member 33. The upper guide member 31 is rotatably disposed within the upper circular hole 24 of the upper platform 21, and the first upper support member 32 and the second upper support member 33 are slidably disposed within the upper circular hole 24. The first upper support member 32 and the second upper support member 33 are provided with a first guide protrusion 34, and the upper guide member 31 is provided with a first guide groove 35, with the first guide protrusion 34 located within the first guide groove 35. The upper guide member 31 is provided with a ring gear 36 with a notch, which is connected to the linkage assembly for transmission. The upper guide member 31 rotates to cause the first guide groove 35 to drive the first upper support member 32 and the second upper support member 33 to perform linear telescopic movement, thereby adjusting the diameter of the circle formed by the first upper support member 32 and the second upper support member 33. Furthermore, there are two first upper support pieces 32 and one second upper support piece 33. The two first upper support pieces 32 are horizontally facing each other, and the second upper support piece 33 is facing the opening on the upper platform 21.

[0032] Specifically, the lower support mechanism includes a drive motor 51, a lower guide member 52, a first lower support member 53, and a second lower support member 54. The drive motor 51 is mounted on the lower platform 22. The lower guide member 52 is rotatably mounted in the lower circular hole 25 of the lower platform 22. The first lower support member 53 and the second lower support member 54 are slidably mounted in the lower circular hole 25. The first lower support member 53 and the second lower support member 54 are provided with a second guide protrusion 55. The lower guide member 52 is provided with a second guide groove 56. The second guide protrusion 55 is located in the second guide groove 56. The lower guide member 52 is provided with a ring of teeth 57. The teeth 57 are respectively engaged with the output end of the drive motor 51 and the linkage component. The lower guide member 52 rotates to cause the second guide groove 56 to drive the first lower support member 53 and the second lower support member 54 to perform linear telescopic movement, so as to adjust the diameter of the circle formed by the first lower support member 53 and the second lower support member 54. Limiting rods 12 are provided on the first upper support 32, the second upper support 33, the first lower support 53, and the second lower support 54, respectively. The limiting rods 12 are slidably connected to the upper and lower circular holes. Furthermore, there are two first lower supports 53 and two lower lower supports 54, arranged horizontally opposite each other. When the lower guide 52 rotates, under the action of the limiting rods 12, the second guide groove 56 pushes the second guide protrusion 55 to move linearly, thereby driving the first lower support 53 and the second lower support 54 to move linearly to adjust their diameter, facilitating the passage of the connecting flange 7 through the lower platform 22. Combined with the telescopic pipe rack, different lengths of lifting pipes 4 can be installed. Combined with the lower support mechanism, longer pipes can be installed and slid into the water tank, facilitating the connection of the upper flange 7 of the lifting pipe 4 to the connecting flange 7 at the tail end of the lifting pipe 4 at the lower end of the bend 2.

[0033] Example 3:

[0034] like Figures 6 to 9As shown, in conjunction with the technical solution of Embodiment 2, in this embodiment, the linkage component includes a drive gear 61, a transmission telescopic shaft 62, a first transmission gear 63, and a second transmission gear 64. The transmission telescopic shaft 62 is rotatably mounted on the upper platform 21 and the lower platform 22. The drive gear 61 is connected to the lower end of the transmission telescopic shaft 62, and the first transmission gear 63 and the second transmission gear 64 are connected to the upper end of the transmission telescopic shaft 62. The drive gear 61 meshes with teeth 57 for transmission, and the first transmission gear 63 meshes with ring gear 36 for transmission. A rotating component 9 is rotatably mounted on the upper platform 21 to press the connecting flange 7 on the bend 2, so as to prevent the lifting pipe 4 at the end of the bend 2 from shaking during operation. The rotating component 9 has a V-shaped opening, and its upper end face has an arc-shaped rack 10. The arc-shaped rack 10 meshes with the second transmission gear 64 to drive the rotating component 9 to rotate on the upper platform 21 through the meshing of the arc-shaped rack 10 and the second transmission gear 64. Further, when the rotating component 9 rotates until the V-shaped opening coincides with the opening on the upper platform 21, the connection of the lowermost flange 7 of the lifting pipe 4 at the end of the bent pipe 2 is released. This allows the rotating mechanism 3 to rotate the bent pipe 2 while simultaneously rotating the first section of the lifting pipe 4 away from the telescopic pipe frame, so that the new lifting pipe 4 can enter the upper bracket mechanism and move vertically to connect with the upper flange 7 of the lifting pipe 4 on the lower bracket mechanism. The lower end of the transmission telescopic shaft 62 is provided with a pressure sleeve 11 for pressing the lower flange 7 of the lifting pipe 4. Furthermore, the transmission telescopic shaft 62 includes an upper transmission shaft and a lower transmission shaft. The upper transmission shaft is connected to the upper platform 21, and the lower transmission shaft is connected to the lower platform 22. A rectangular rod is provided at the end of the upper transmission shaft, and the rectangular rod is slidably connected to the lower transmission shaft, so that the transmission telescopic shaft 62 can perform telescopic movement while rotating. Furthermore, the rotating component 9 is rotatably mounted on the upper platform 21 via an arc-shaped component. The rotating component 9 is provided with an arc-shaped groove, and the arc-shaped component is provided with an arc-shaped protrusion. The arc-shaped protrusion is located in the arc-shaped groove, so that the rotating component 9 can rotate stably on the end face of the upper platform 21.

[0035] Specifically, the first guide groove 35 is divided into an outer arc section and an inclined section. The first guide protrusion 34 enters the inclined section first and then the outer arc section through the rotation of the upper guide member 31, so that the notch on the upper guide member 31 and the V-shaped opening on the rotating member 9 can rotate synchronously to be aligned with the opening on the upper platform 21, so that the lifting tube 4 and the connecting flange 7 on the lifting tube 4 can be freed from the constraint of the upper platform 21. The center of the opening on the upper platform 21 is located at the center of the rotating mechanism 3, so that the arc-shaped opening can allow the lifting tube 4 to rotate around the center of the rotating mechanism 3 and get off the upper platform 21. The second guide groove 56 is divided into an inner arc section and an inclined section. The second guide protrusion 55 enters the inner arc section first and then the inclined section through the rotation of the lower guide member 52, so that the notch on the upper guide member 31 and the V-shaped opening on the rotating member 9 can rotate synchronously to be aligned with the opening on the upper plate 21. This allows the teeth 57 on the lower guide member 52 to first drive the drive gear 61 to rotate the transmission telescopic shaft 62 to release the pressure restraint on the connecting flange 7. The second guide protrusion 55 enters the inclined section through the continued rotation of the lower guide member 52, thereby causing the first lower support member 53 and the second lower support member 54 to contract to adjust the size of the hole they form, so that the connecting flange 7 can pass through. Furthermore, by setting outer and inner arc segments, combined with a telescopic pipe rack, the newly connected vertical lifting pipe 4 can pass through and descend until its uppermost connecting flange 7 contacts the first lower support 53 and the second lower support 54 to limit its movement. At this time, the rotating mechanism 3 drives the bend 2 to reset, so that the first section of the lifting pipe 4 on the bend 2 can be aligned and connected with the lifting pipe 4 on the lower platform 22. The upper guide 31 and the lower guide 52 are respectively limited to the inner walls of the upper and lower circular holes by the limiting protrusions.

[0036] Specifically, it also includes an upper cover plate and a lower cover plate, with the upper cover plate covering the upper platform 21 and the lower cover plate covering the lower platform 22. It also includes an electromagnetic lock, which is located on the lower end cover. The electromagnetic lock is energized to disconnect from the lock hole on the lower guide member 52, thereby releasing the rotational freedom of the lower guide member 52.

[0037] Example 4:

[0038] like Figure 4As shown, in conjunction with the technical solution of Embodiment 3, in this embodiment, the lower section of the riser pipe 4 is equipped with an injection valve block. The injection valve block has a ring structure and is connected to the riser pipe 4 via a connecting flange 7. The injection valve block has an air inlet, and the injection pipe 72 is connected to the air inlet. Further, the injection valve block is installed at the connecting flange 7 of both ends of the riser pipe 4 and is simultaneously connected to the injection pipe 72. The injection valve block is designed with 1-3 different injection holes, designed at three angles: horizontal, 45°, and 60°. Furthermore, the design of the injection valve block is diversified. Depending on the number of injection holes and the injection angle, this experimental system will design a total of four types of injection valve blocks: a 1-hole horizontal injection valve block, a 3-hole horizontal injection valve block, a 3-hole 45° injection valve block, and a 3-hole 60° injection valve block. During the system deployment and recovery phase, different injection valve blocks can be used to change the system's injection parameters, thereby allowing the analysis of the impact of different influencing factors on the system's lifting efficiency using the controlled variable method.

[0039] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention in any way. Any person skilled in the art can make many possible variations and modifications to the technical solutions of the present invention, or modify them into equivalent embodiments, without departing from the scope of the present invention. Therefore, any modifications, equivalent changes, and alterations made to the above embodiments based on the technology of the present invention without departing from the scope of the present invention are within the protection scope of the present invention.

Claims

1. An experimental device for air-lifting water tanks, characterized in that... The system includes a surface truss (1), a telescopic pipe frame, a bend (2), a rotating mechanism (3), a lifting pipe (4), a feeding pipe (5), and an air injection mechanism (6). The bend (2) is rotatably mounted on the surface truss (1) via the rotating mechanism (3). The lifting pipe (4) consists of multiple segments connected by connecting flanges (7). The lifting pipe (4) is vertically connected to the end of the bend (2). The lower end of the lifting pipe (4) is connected to an underwater hopper (8). One end of the feeding pipe (5) is fixed to... On the surface truss (1), the other end of the feed pipe (5) is connected to the underwater silo (8); the air injection mechanism (6) is located on the surface truss (1) and is connected to the lower part of the lift pipe (4); it also includes an upper bracket mechanism for limiting the connecting flange (7) on the bend pipe (2) and a lower bracket mechanism for limiting the connecting flange (7) on the lift pipe (4), the upper bracket mechanism is located on the upper side of the telescopic pipe frame and the lower bracket mechanism is located on the lower side of the telescopic pipe frame; The rotating mechanism (3) includes a rotating frame (41) and a rotating motor (42). The rotating frame (41) is rotatably mounted on the upper end of the water surface truss (1). The rotating motor (42) is mounted on the water surface truss (1). The output end of the rotating motor (42) is connected to the rotating frame (41). The bent pipe (2) is fixed on the rotating frame (41). The telescopic pipe frame includes an upper platform (21) with a horizontal opening, a lower platform (22) and an electric telescopic rod (23). The upper platform (21) and the lower platform (22) are connected by the electric telescopic rod (23). The lower platform (22) is fixed on the water surface truss (1). The upper support mechanism is located on the upper platform (21) and the lower support mechanism is located on the lower platform (22). The upper support mechanism is connected to the lower support mechanism through a linkage component. The upper support mechanism includes an upper guide member (31) with an opening, a first upper support member (32), and a second upper support member (33). The upper guide member (31) is rotatably disposed within an upper circular hole (24) of the upper platform (21), and the first upper support member (32) and the second upper support member (33) are slidably disposed within the upper circular hole (24). The first upper support member (32) and the second upper support member (33) are provided with a first guide protrusion (34), and the upper guide member (31) is provided with a first guide groove (3). 5) The first guide protrusion (34) is located in the first guide groove (35); the upper guide member (31) is provided with a ring gear (36) with a notch, the ring gear (36) is connected to the linkage component for transmission, and the upper guide member (31) rotates to make the first guide groove (35) drive the first upper support member (32) and the second upper support member (33) to perform linear extension and retraction movements, so as to adjust the diameter of the circle formed by the first upper support member (32) and the second upper support member (33).

2. The air-lift lifting water tank experimental apparatus according to claim 1, characterized in that, The air injection mechanism (6) includes an air compressor (71) and an air injection pipe (72). The air compressor (71) is mounted on the water surface truss (1). One end of the air injection pipe (72) is connected to the output end of the air compressor (71), and the other end of the air injection pipe (72) is connected to the lower part of the lift pipe (4).

3. The air-lift lifting water tank experimental apparatus according to claim 2, characterized in that, The lower support mechanism includes a drive motor (51), a lower guide member (52), a first lower support member (53), and a second lower support member (54). The drive motor (51) is mounted on the lower platform (22). The lower guide member (52) is rotatably disposed within the lower circular hole (25) of the lower platform (22). The first lower support member (53) and the second lower support member (54) are slidably disposed within the lower circular hole (25). The first lower support member (53) and the second lower support member (54) are provided with a second guide protrusion (55). The lower guide member (52) is provided with... There is a second guide groove (56), and the second guide protrusion (55) is located in the second guide groove (56); the lower guide member (52) is provided with a ring of teeth (57), and the teeth (57) are respectively engaged with the output end of the drive motor (51) and the linkage component. The lower guide member (52) rotates to make the second guide groove (56) drive the first lower support member (53) and the second lower support member (54) to perform linear telescopic movement, so as to adjust the diameter of the circle formed by the first lower support member (53) and the second lower support member (54).

4. The air-lift lifting water tank experimental apparatus according to claim 3, characterized in that, The linkage assembly includes a drive gear (61), a transmission telescopic shaft (62), a first transmission gear (63), and a second transmission gear (64). The transmission telescopic shaft (62) is rotatably mounted on the upper platform (21) and the lower platform (22). The drive gear (61) is connected to the lower end of the transmission telescopic shaft (62). The first transmission gear (63) and the second transmission gear (64) are connected to the upper end of the transmission telescopic shaft (62). The drive gear (61) meshes with the teeth (57) for transmission, and the first transmission gear (63) meshes with the ring gear (36) for transmission.

5. The air-lift lifting water tank experimental apparatus according to claim 4, characterized in that, The upper plate (21) is rotatably provided with a rotating component (9) for pressing the connecting flange (7) on the bend (2). The rotating component (9) is provided with a V-shaped opening and an arc-shaped rack (10) is provided on the upper end face of the rotating component (9). The arc-shaped rack (10) meshes with the second transmission gear (64) for transmission.

6. The air-lift lifting water tank experimental apparatus according to claim 4, characterized in that, The lower end of the transmission telescopic shaft (62) is provided with a pressure sleeve (11) for pressing the connecting flange (7) at the lower end of the lifting pipe (4).

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