A water bladder support device

Abstract

The application provides a water bag supporting device, which comprises a supporting rod and a pressing mechanism, the supporting rod has a cavity, each end of the supporting rod is provided with a pipe opening, the pressing mechanism comprises a water bag and two movable components, the water bag is arranged in the cavity of the supporting rod and is used for receiving and storing water to adjust the size of the water bag, each end of the supporting rod is respectively provided with one movable component, the movable component is arranged at the pipe opening of the supporting rod in an axial sliding mode and is used for covering the pipe opening of the supporting rod, the water bag is axially expanded along the inner cavity of the supporting rod after water is filled in the water bag, and the movable component is pressed on the retaining wall, so that the supporting rod is matched with the movable component to support the retaining wall. The water bag supporting device adopts a radial force mode, and the bearing capacity of the supporting device is significantly improved.

Description

Technical Field

[0001] This invention belongs to the field of construction technology of foundation pit engineering retaining support, and specifically relates to a water bag support device. Background Technology

[0002] In foundation pit projects with high environmental protection requirements (such as those near protected buildings or tunnels), steel or concrete supports equipped with servo systems are typically considered. These systems can dynamically and actively adjust the axial force of the supports during excavation, enabling proactive control of the deformation of the retaining structure and effectively reducing construction risks. Compared to traditional passive support systems, servo support systems offer real-time adjustment of the axial force and are now widely used in foundation pit projects.

[0003] Servo support systems typically feature hydraulic jacks at the support ends (one or both ends), with the axial force and stroke of the jacks remotely adjusted by a hydraulic control system. During excavation of the foundation pit, when the excavation reaches the designed support position, the servo support system is installed, and the axial force is applied to the predetermined design value via the hydraulic control system to continue excavation downwards. As the soil beneath the current layer is excavated, the deformation of the retaining structure gradually increases, and the support axial force rises accordingly. If the retaining deformation is detected to exceed the allowable threshold, the system can actively increase the support axial force via the end jacks, thereby achieving dynamic control of the deformation.

[0004] The stress mode of the servo support system is as follows: earthwork excavation causes external soil pressure to act on the retaining structure, resulting in increased deformation of the retaining structure into the pit, which in turn causes the servo support system to be under compression and the axial force to increase. During this process, the support components exhibit a state of compression-bending stress, and their stability has a significant impact on the determination of the support length.

[0005] Because the support ends of the servo support system directly contact the enclosure structure to transmit axial force and lack the ability to release rotational constraints, if the support is not strictly perpendicular to the enclosure structure facade during installation, or if the enclosure surfaces corresponding to both ends are not parallel (e.g., one end is perpendicular and the other end is inclined), uneven stress will occur on the support end face, resulting in a significant additional bending moment. This will further weaken the stability of the servo support system and increase structural risk. Summary of the Invention

[0006] This invention provides a water bladder support device that adopts a radial force-bearing mode, which significantly improves the load-bearing capacity of the support device.

[0007] The technical solution of the present invention is as follows:

[0008] A water bladder support device, comprising:

[0009] A support rod having a cavity, and each of the two axial ends of the support rod is provided with a tube opening;

[0010] A pressing mechanism, comprising: a water bladder disposed within the cavity of a support rod, for receiving and storing water to adjust the size of the water bladder;

[0011] Two movable components are provided, one of which is installed at the opening of each end of the support rod. The movable component is slidably installed at the opening of the support rod along the axial direction of the support rod to cover the opening of the support rod. After the water bag is filled with water, it expands axially along the inner cavity of the support rod to press the movable component tightly against the retaining wall and cooperate with the support rod to support the retaining wall.

[0012] A water bladder support device, comprising:

[0013] A support rod having a cavity, wherein at least one end of the support rod is provided with a tube opening at both axial ends;

[0014] A pressing mechanism, comprising: a water bladder disposed within the cavity of a support rod, for receiving and storing water to adjust the size of the water bladder;

[0015] A movable component is provided at the opening of the support rod. The movable component is slidably disposed at the opening of the support rod along the axial direction of the support rod to cover the opening of the support rod. After the water bag is filled with water, it expands axially along the inner cavity of the support rod to press the movable component tightly against the retaining wall and cooperate with the support rod to support the retaining wall.

[0016] Furthermore, in the water bladder support device, the support rod includes a first support unit and a second support unit connected together, the water bladder is disposed in the cavity of the first support unit, and the movable component is disposed at the end of the first support unit away from the second support unit.

[0017] Furthermore, in the water bladder support device, the clamping mechanism includes two water bladders, and the support rod includes a third support unit, a fourth support unit, and a fifth support unit connected sequentially along the axial direction. The two water bladders are respectively disposed in the inner cavities of the third support unit and the fifth support unit, and the two movable components are respectively disposed at the ends of the third support unit and the fifth support unit away from the fourth support unit.

[0018] Furthermore, in the water bladder support device, the third support unit and the fourth support unit are connected by a first bolt, and the fourth support unit and the fifth support unit are connected by a second bolt.

[0019] Furthermore, in the aforementioned water bladder support device, the movable component includes a movable part and a rotating support; a groove is provided on the outer wall of the support rod opening; the sliding end of the movable part slides axially with the groove; and the rotating support is installed at the connecting end of the movable part; and / or,

[0020] The radial cross-section of the support rod is square, circular, or elliptical.

[0021] Furthermore, in the aforementioned water bladder support device, the rotating support includes a first support plate, a second support plate, and a ball core. The first support plate and the second support plate are hinged together by the ball core. The end of the first support plate away from the ball core is connected to the connecting end of the movable part. The end of the second support plate away from the ball core is used to support the retaining wall; and / or,

[0022] The movable part has a T-shaped structure, the connecting end of the movable part is a connecting plate, the sliding end of the movable part has a cylindrical structure, and the connecting end of the movable part covers the opening of the support rod and is connected to the rotating support by a third bolt; and / or,

[0023] The ends of the first and second support plates furthest from the ball core are flat; and / or,

[0024] The first support plate and the second support plate are triangular structures with ribs.

[0025] Furthermore, the water bladder support device further includes a water supply assembly, which includes a water tank, an inlet pipe, and an outlet pipe. One end of the inlet pipe is connected to the water tank, and the other end of the inlet pipe passes through the support rod and is connected to the water bladder for injecting liquid into the water bladder. One end of the outlet pipe is connected to the water tank, and the other end of the outlet pipe passes through the support rod and is connected to the water bladder for discharging liquid from the water bladder.

[0026] Furthermore, in the aforementioned water bladder support device, valves for controlling the inlet or outlet of liquid are respectively installed in the inlet pipe and the outlet pipe; and / or,

[0027] A pressure sensor is installed inside the water bladder to monitor the pressure value of the water bladder.

[0028] Furthermore, the water bladder support device further includes a control platform connected to the water supply component, which is used to control the water supply component to fill or release water into the water bladder.

[0029] The beneficial effects of this invention are as follows:

[0030] This invention discloses a water-filled support device. By incorporating a water-filled bladder within a support rod, the rigidity of the support rod constrains the radial deformation of the water-filled bladder, effectively preventing instability caused by axial pressure on the support rod. It also solves the leakage problem of hydraulic cylinders in existing servo support systems. By adjusting the water volume and pressure within the water-filled bladder, the displacement of the movable components and the axial force of the support can be adjusted, allowing the support system to adapt to foundation pit deformation and ensuring the safety of foundation pit construction. Furthermore, by incorporating movable components at both ends of the support rod, the additional bending moment caused by non-parallel or uneven stress on the two end faces of the support device due to the retaining wall, is eliminated. This allows the support system to adapt to complex working conditions where the support is not perpendicular to the retaining wall or is safely tilted, expanding the application range of the support system. This water-filled support device transforms the bending stability problem of the support rod in traditional servo support systems into a radial stress mode, significantly improving the load-bearing capacity of the support device. Attached Figure Description

[0031] Figure 1 This is a partial cross-sectional schematic diagram of Embodiment 1 of a water bladder support device of the present invention;

[0032] Figure 2 This is a partial cross-sectional application diagram of a water bladder support device according to the present invention;

[0033] Figure 3 This is a partial cross-sectional schematic diagram of Embodiment 3 of a water bladder support device of the present invention;

[0034] Figure 4 This is a schematic diagram of the stress on a steel pipe supported by a traditional steel pipe.

[0035] Figure 5 This is a schematic diagram of the force on the water bladder inside the support rod of a water bladder support device according to the present invention;

[0036] Figure 6 This is a force diagram of the movable component of a water bladder support device according to the present invention.

[0037] In the diagram: 1. Support rod; 2. Water bladder; 3. Movable component; 4. Water supply component; 5. Enclosing wall; 11. Cavity; 12. Pipe opening; 13. Third support unit; 14. Fourth support unit; 15. Fifth support unit; 16. Slide groove; 31. Movable part; 32. Rotating support; 33. Third bolt; 311. Sliding end; 312. Connecting end; 321. First support plate; 322. Second support plate; 323. Ball core; 41. Water tank; 42. Inlet pipe; 43. Outlet pipe; 44. Valve. Detailed Implementation

[0038] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. The advantages and features of the present invention will become clearer from the following description and claims. It should be noted that the drawings are all in a very simplified form and use non-precise proportions, and are only used to facilitate and clarify the illustration of the embodiments of the present invention.

[0039] Example 1:

[0040] like Figure 1 As shown, this embodiment provides a water bladder support device, including a support rod 1 and a pressing mechanism, as well as a water supply component 4 and a control platform (not shown).

[0041] The support rod 1 has a cavity 11, and each of its two axial ends is provided with a pipe opening 12. The support rod 1 can be configured as a square or circular structure, and in special cases, it can be configured as an elliptical structure. The radial cross-section of the support rod 1 can be square, circular, or elliptical. The cavity 11 can be configured as a cylindrical structure. The support rod is preferably a steel pipe.

[0042] The clamping mechanism includes a water bladder 2 and two movable components 3. The water bladder 2 is disposed within the cavity 11 of the support rod 1 and is used to receive and store water to adjust its size. The water bladder 2 is connected to a water supply component 4. The water supply component 4 is connected to a control platform. The control platform controls the water supply component 4 to fill or drain the water bladder 2 according to the support requirements and the pressure of the water bladder 2.

[0043] A movable component 3 is respectively provided at the opening 12 of each end of the support rod 1. The movable component 3 is slidably disposed at the opening 12 of the support rod 1 along the axial direction of the support rod 1, and is used to cover the opening 12 of the support rod 1. After the water bag 2 is filled with water, it expands axially along the inner cavity of the support rod 1, and is used to press the movable component 3 against the retaining wall 5, and cooperate with the support rod 1 to support the retaining wall 5. The movable component 3 may include a movable part 31 and a rotating support 32. The rotating support 32 is preferably a ball joint support. A groove 16 is provided on the outer wall of the opening 12 of the support rod 1. The groove 16 may be embedded in the outer wall of the opening 12 of the support rod 1, or it may be formed by an L-shaped annular structure wrapped around the outer wall of the opening 12. The sliding end 311 of the movable part 31 is inserted into the groove 16 and slides axially with the groove 16. The gap between the sliding end 311 and the groove 16 is 2-3 mm. The rotating support 32 is mounted on the connecting end 312 of the movable part 31. The movable part 31 is preferably a T-shaped structure. The connecting end 312 of the movable part 31 is a connecting plate, and the sliding end 311 of the movable part 31 has a cylindrical structure. The connecting end 312 of the movable part 31 covers the opening 12 of the support rod 1 and can be connected to the rotating support 32 by a flange using a high-strength third bolt 33.

[0044] Specifically, such as Figure 2 As shown, the water bag 2 is placed in the inner cavity of the support rod 1, and then the two movable components 3 are installed at the pipe openings 12 at both ends of the support rod 1. The sliding end 311 of the movable part 31 can be slidably connected to the sliding groove 16 on the outer wall of the pipe opening 12 of the support rod 1, and then the rotating support 32 is installed on the connecting end 312 of the movable part 31 to form a water bag support device.

[0045] When the excavation reaches the bottom elevation of the support, a water-filled support device is installed, positioned between two opposing retaining walls 5. The control platform then controls the water supply assembly 4 to inject water into the water-filled bladder 2 inside the support rod 1. The rigidity of the support rod 1 constrains the radial deformation of the water-filled bladder 2, causing it to expand axially along the inner cavity of the support rod 1. This causes the water-filled bladder 2 to press against the movable parts 31 at both ends of the support rod 1, thereby pressing the rotating supports 32 at both ends of the support rod 1 against the two retaining walls 5, applying a load to the retaining walls 5. The water injection assembly continuously injects water into the water-filled bladder 2 until the supporting force of the water-filled support device reaches the preset requirement. During subsequent excavation of the soil below the support, if it is necessary to increase the axial force of the support, this is achieved by filling the water-filled bladder 2 with water and pressurizing it; if it is necessary to reduce the axial force of the support, this is achieved by appropriately draining and depressurizing the water-filled bladder 2 through the water supply assembly 4. When dismantling the water bladder support device, the water in the water bladder 2 is drained through the water supply component 4 until the pressure is zero. Then, the movable component 3 and the support rod 1 are hoisted and dismantled in sequence. During the operation, the water supply component 4 monitors the water pressure and volume in the water bladder 2 in real time. The water volume and pressure in the water bladder 2 are the direct basis for calculating the stroke of the movable part 31. If a pressure change or displacement of the movable part 31 is detected, the water supply component 4 adjusts the water volume in the water bladder 2 to change the water pressure in the water bladder 2, thereby controlling the support axial force and the displacement of the movable part 31. Since the self-weight of the support rod 1 increases after the water bladder 2 is filled with water, the above structure is preferably suitable for construction situations with small spacing between foundation pit enclosures.

[0046] For situations requiring longer supports, water bladders 2 can be installed at one or both ends of the support rod 1. For example... Figure 3 As shown, water bladders 2 are provided at both ends of the support rod 1. This arrangement reduces the overall weight of the support device (including the liquid inside the cavity) by reducing the volume of water filled in the support rod 1.

[0047] Taking a steel pipe (such as Φ609*16) as an example, the differences in the force-bearing mode between traditional steel pipe supports (including steel pipe supports with servo systems) and this embodiment are explained:

[0048] (1) Traditional steel pipe support (including support with servo system): The force mode of steel pipe support is as follows Figure 4 As shown, ignoring the self-weight of the steel pipe and the additional bending moment at the ends (if any), the preliminary bearing capacity of the steel pipe is estimated as an axially compressed member. The estimation formula is as follows:

[0049] N=ψAfy =ψπ[D 2 -(D-2t) 2 ]f y / 4;

[0050] In the formula, ψ is the support stability coefficient, and f y Where t is the compressive strength of the material, D is the diameter of the steel pipe, and t is the wall thickness of the steel pipe.

[0051] (2) The force-bearing mode of the support device in this embodiment:

[0052] When water bladder 2 is placed inside the steel pipe, it will generate pressure p on the pipe wall and end. Figure 5 As shown, the end pressure can generate a supporting force on both ends of the supporting steel pipe. The estimation formula is as follows:

[0053] N = pA = pπ(D - 2t) 2 / 4;

[0054] In the formula, p is the pressure of the water bladder 2 on the pipe wall and end, D is the diameter of the steel pipe, and t is the thickness of the steel pipe wall.

[0055] As can be seen from the comparison, the load-bearing capacity of traditional steel pipe supports is limited by stability, while the support device in this embodiment does not have stability limitations, and its loading capacity is directly related to the pressure p inside the water bladder 2 and the strength of the steel pipe.

[0056] The two movable components 3 are respectively installed at the pipe openings 12 at both ends of the steel pipe, which can accommodate the additional bending moment caused by the uneven end pressure formed by the deformation of the retaining wall 5 on the support, as explained below:

[0057] like Figure 6 As shown, when the angle α or β between the surface normals of the two retaining walls 5 and the horizontal line is not 0, the rotating support 32 of the movable component 3 at the end of the support rod 1 is rotated and adjusted to adapt to the angle change of the retaining wall 5 facade, so that the support is kept horizontal and the support is under uniform pressure.

[0058] The calculation method for the internal volume V of a steel pipe is as follows:

[0059] V=Lπ(D-2t) 2 / 4;

[0060] In the formula: D is the diameter of the steel pipe, t is the wall thickness of the steel pipe, and L is the length of the steel pipe.

[0061] Considering the incompressibility of water and the circumferential constraint of the steel pipe, the formula for calculating the stroke increment of the water bladder 2 end along the support axis is as follows:

[0062] ;

[0063] In the formula: D is the diameter of the steel pipe, t is the wall thickness of the steel pipe, and L is the length of the steel pipe.

[0064] To prevent the water bladder 2 from bursting, the maximum capacity Vs of the water bladder 2 should be set to γ ​​times the internal volume V of the steel pipe, such as γ ranging from [1.5-2]. The aforementioned steel pipe is the support rod 1 in this application.

[0065] In the above structure, based on the incompressibility of liquid water, a water bladder 2 is installed inside the support rod 1. The rigidity of the support rod 1 constrains the radial deformation of the water bladder 2, effectively preventing instability of the support rod 1 under axial pressure. This also solves the leakage problem of the hydraulic cylinder in the jack of the existing servo support system. By adjusting the water volume and pressure in the water bladder 2, the displacement of the movable component 3 and the axial force of the support can be adjusted, allowing the support system to adapt to the deformation of the foundation pit and ensuring the safety of the foundation pit construction. By setting movable components 3 at both ends of the support rod 1, the additional bending moment caused by the non-parallel or uneven stress on the two end faces of the support device due to the retaining wall 5 is eliminated. This allows the support system to adapt to complex working conditions where the support is not perpendicular to the retaining wall 5 or is safely tilted, expanding the application range of the support system. This water bladder support device transforms the bending stability problem of the support rod 1 in the traditional servo support system into a radial stress mode for the support rod 1, significantly improving the load-bearing capacity of the support device.

[0066] Example 2:

[0067] This embodiment also provides a water bladder support device, including a support rod 1 and a pressing mechanism, as well as a water supply component 4 and a control platform (not shown).

[0068] The support rod 1 has a cavity 11, and one end of the support rod 1 is provided with a port 12 at both axial ends. The support rod 1 may include a first support unit (not shown) and a second support unit (not shown) connected together. The port 12 is located at the end of the first support unit away from the second support unit.

[0069] The clamping mechanism includes a water bladder 2 and a movable component 3. The water bladder 2 is disposed within the cavity 11 of the first support unit. The movable component 3 is slidably disposed along the axial direction of the support rod 1 at the opening 12 of the first support unit, and is used to cover the opening 12 of the first support unit. After water is introduced into the water bladder 2, it expands axially along the inner cavity of the support rod 1, and is used to press the movable component 3 at the opening 12 of the first support unit against the retaining wall 5, thereby cooperating with the support rod 1 to support the retaining wall 5.

[0070] In the above structure, a water bladder 2 and a movable component 3 are set at one end of the support rod 1, which not only achieves stable support for the foundation pit retaining structure, but also realizes the adjustment of the axial force of the support on one side. It is preferably suitable for construction scenarios with appropriate foundation pit retaining spacing.

[0071] Example 3:

[0072] like Figure 3 As shown, this embodiment also provides a water bladder support device, including a support rod 1 and a pressing mechanism, as well as a water supply component 4 and a control platform.

[0073] The support rod 1 has a cavity 11, and each of its two axial ends is provided with a pipe opening 12. The support rod 1 may include a third support unit 13, a fourth support unit 14, and a fifth support unit 15 connected sequentially along the axial direction. The two pipe openings 12 are respectively located at the ends of the third support unit 13 and the fifth support unit away from the fourth support unit 14. The third support unit 13 and the fourth support unit 14 may be connected by a flange using a high-strength first bolt, and the fourth support unit 14 and the fifth support unit 15 may be connected by a flange using a high-strength second bolt.

[0074] The clamping mechanism includes two water bladders 2 and two movable components 3. The two water bladders 2 are respectively disposed within the cavities of the third support unit 13 and the fifth support unit 15, and the two movable components 3 are respectively disposed at the ends of the third support unit 13 and the fifth support unit 15 away from the fourth support unit 14. The two movable components 3 are slidably disposed along the axial direction of the support rod 1 at the openings 12 of the third support unit 13 and the fifth support unit 15, respectively, to cover the openings 12 of the third support unit 13 and the fifth support unit 15. After water is introduced into the two water bladders 2, they expand axially along the inner cavities of the third support unit 13 and the fifth support unit 15, respectively, to clamp the two movable components 3 onto the two opposing retaining walls 5, thus cooperating with the support rod 1 to support the retaining walls 5. The structure of the movable components is the same as that of the movable components in Embodiment 1. Figure 3 Not shown in the image.

[0075] In the above structure, water bladders 2 and movable components 3 are set at both ends of the support rod 1, which not only achieves stable support for the foundation pit retaining structure, but also realizes the adjustment of the axial force of the double-sided support, making it preferably suitable for construction scenarios with large foundation pit retaining spacing.

[0076] like Figure 1As shown, in a preferred embodiment, the rotating support 32 includes a first support plate 321, a second support plate 322, and a ball core 323. The first support plate 321 and the second support plate 322 are hinged together by the ball core 323. The end of the first support plate 321 away from the ball core 323 is connected to the connecting end 312 of the movable part 31. The end of the second support plate 322 away from the ball core 323 is used to support the retaining wall 5. The first support plate 321 and the second support plate 322 can preferably be a triangular structure with ribs, and the end of the first support plate 321 and the second support plate 322 away from the ball core 323 is a plane.

[0077] The plane of the second support plate 322 abuts against the retaining wall 5, and the plane of the first support plate 321 is connected to the connecting plate of the movable part 31 by the third bolt 33. The second support plate 322 rotates around the first support plate 321. After the water bag 2 is filled with water, it expands axially along the cavity 11 of the support rod 1, driving the movable part 31 to move towards the retaining wall 5. The movable part 31 drives the first support plate 321 to move the second support plate 322 towards the retaining wall 5. If the retaining wall 5 is not parallel or has an uneven structure, the second support plate 322 abuts against the retaining wall 5 and its angle is slightly adjusted to solve the additional bending moment caused by the above problems in the support device. During the support process, the second support plate 322 can adjust its angle slightly with the deformation of the retaining wall 5.

[0078] The rotating support 32 not only enables adaptive deformation of the foundation pit, ensuring the safety of foundation pit construction, but also adapts to complex working conditions, expanding the application range of the device.

[0079] like Figure 1 As shown, in a preferred embodiment, the water supply assembly 4 includes a water tank 41, an inlet pipe 42, and an outlet pipe 43. One end of the inlet pipe 42 is connected to the water tank 41, and the other end passes through the support rod 1 and connects to the water bladder 2 for filling the water bladder 2 with liquid. One end of the outlet pipe 43 is connected to the water tank 41, and the other end passes through the support rod 1 and connects to the water bladder 2 for discharging the liquid from the water bladder 2. The support rod 1 is provided with a through hole for the inlet pipe 42 and the outlet pipe 43 to pass through. Two to three valves 44 are respectively provided in the inlet pipe 42 and the outlet pipe 43 for controlling the inflow or outflow of liquid. The valves 44 are preferably one-way valves.

[0080] Furthermore, a pressure sensor (not shown) is provided inside the water bladder 2, which is used to monitor the pressure value of the water bladder 2.

[0081] The water supply component 4 is configured to fill and release water into the water bladder 2 based on the pressure value of the water bladder 2, thereby improving the regulation efficiency.

[0082] In a preferred embodiment, the control platform is connected to the water supply component 4 and is used to control the water supply component 4 to fill or release water into the water bladder 2. The control platform controls the water supply component 4 to fill or release water into the water bladder 2 based on the pressure value of the water bladder 2. The inlet pressure and inlet volume of the water bladder 2 are used to adjust the supporting force and stroke of the movable component 3 on the retaining wall 5, respectively.

[0083] The control platform can be any applicable computing device, such as a personal computer, server, programmable logic controller (PLC controller), microcontroller, etc., or it can be an integration of computer devices. The control platform has functions such as receiving information and sending control commands. The control platform can control the water supply component 4 to fill or release water in the water tank 2 through wired or wireless communication.

[0084] The above description is merely a description of preferred embodiments of the present invention and is not intended to limit the scope of the present invention in any way. Any changes or modifications made by those skilled in the art based on the above disclosure shall fall within the protection scope of the claims.

Claims

1. A water bladder support device, characterized in that, include: The support rod (1) has a cavity (11), and each end of the support rod (1) is provided with a port (12) at both ends of its axial direction; A pressing mechanism, comprising: a water bladder (2), wherein the water bladder (2) is disposed in the cavity (11) of the support rod (1) for receiving and storing water to adjust the size of the water bladder (2); Two movable components (3) are provided at the pipe opening (12) at each end of the support rod (1). The movable component (3) is slidably disposed at the pipe opening (12) of the support rod (1) along the axial direction of the support rod (1) to cover the pipe opening (12) of the support rod (1). After the water bag (2) is filled with water, it expands axially along the inner cavity of the support rod (1) to press the movable component (3) against the retaining wall (5) and cooperate with the support rod (1) to support the retaining wall (5).

2. A water bladder support device, characterized in that, include: A support rod (1) has a cavity (11), and at least one end of the support rod (1) is provided with a port (12) at both axial ends; A pressing mechanism, comprising: a water bladder (2), wherein the water bladder (2) is disposed in the cavity (11) of the support rod (1) for receiving and storing water to adjust the size of the water bladder (2); An active component (3) is provided at the opening (12) of the support rod (1). The active component (3) is slidably disposed at the opening (12) of the support rod (1) along the axial direction of the support rod (1) to cover the opening (12) of the support rod (1). After the water bag (2) is filled with water, it expands axially along the inner cavity of the support rod (1) to press the active component (3) against the retaining wall (5) and cooperate with the support rod (1) to support the retaining wall (5).

3. The water bladder support device as described in claim 2, characterized in that, The support rod (1) includes a first support unit and a second support unit connected together. The water bladder (2) is disposed in the cavity (11) of the first support unit. The movable component (3) is disposed at the end of the first support unit away from the second support unit.

4. The water bladder support device as described in claim 1, characterized in that, The clamping mechanism includes two water bladders (2), and the support rod (1) includes a third support unit (13), a fourth support unit (14) and a fifth support unit (15) connected in sequence along the axial direction. The two water bladders (2) are respectively disposed in the inner cavities of the third support unit (13) and the fifth support unit (15). The two movable components (3) can be respectively disposed at the ends of the third support unit (13) and the fifth support unit (15) away from the fourth support unit (14).

5. The water bladder support device as described in claim 4, characterized in that, The third support unit (13) and the fourth support unit (14) are connected by a first bolt, and the fourth support unit (14) and the fifth support unit (15) are connected by a second bolt.

6. The water bladder support device as described in claim 1 or 2, characterized in that, The movable component (3) includes a movable part (31) and a rotating support (32). A groove (16) is provided on the outer wall of the support rod (1) at its port (12). The sliding end (311) of the movable part (31) slides axially with the groove (16). The rotating support (32) is installed at the connecting end (312) of the movable part (31); and / or, The radial cross-section of the support rod (1) is square, circular or elliptical.

7. The water bladder support device as described in claim 6, characterized in that, The rotating support (32) includes a first support plate (321), a second support plate (322), and a ball core (323). The first support plate (321) and the second support plate (322) are hinged together by the ball core (323). The end of the first support plate (321) away from the ball core (323) is connected to the connecting end (312) of the movable part (31). The end of the second support plate (322) away from the ball core (323) is used to support the retaining wall (5); and / or, The movable part (31) has a T-shaped structure, the connecting end (312) of the movable part (31) is a connecting plate, the sliding end (311) of the movable part (31) has a cylindrical structure, the connecting end (312) of the movable part (31) covers the opening (12) of the support rod (1) and is connected to the rotating support (32) by a third bolt (33); and / or, The ends of the first support plate (321) and the second support plate (322) away from the spherical core (323) are flat; and / or, The first support plate (321) and the second support plate (322) are triangular structures with ribs.

8. The water bladder support device as described in claim 1 or 2, characterized in that, The water bladder support device also includes a water supply component (4), which includes a water tank (41), an inlet pipe (42), and an outlet pipe (43). One end of the inlet pipe (42) is connected to the water tank (41), and the other end of the inlet pipe (42) passes through the support rod (1) and is connected to the water bladder (2) for injecting liquid into the water bladder (2). One end of the outlet pipe (43) is connected to the water tank (41), and the other end of the outlet pipe (43) passes through the support rod (1) and is connected to the water bladder (2) for discharging liquid from the water bladder (2).

9. The water bladder support device as described in claim 8, characterized in that, The inlet pipe (42) and outlet pipe (43) are respectively equipped with valves (44) for controlling the inlet or outlet of liquid; and / or, A pressure sensor is installed inside the water bladder (2) to monitor the pressure value of the water bladder (2).

10. The water bladder support device as described in claim 8, characterized in that, The water bladder support device also includes a control platform, which is connected to the water supply component (4) and is used to control the water supply component (4) to fill or release water into the water bladder (2).

Images