Underwater temporary plugging device and plugging method for water delivery tunnel of reservoir

Abstract

The invention provides an underwater temporary plugging device and plugging method for a water delivery tunnel of a reservoir. The device comprises a blocking door; the transverse supporting mechanism is arranged on the blocking door; the circumferential fixing mechanism is arranged in the circumferential direction of the blocking door. The sealing mechanism is arranged on the periphery of the blocking door in the circumferential direction of the blocking door. The transverse supporting mechanism is transversely supported on the inner wall of the tunnel, so that preliminary supporting of the blocking door is achieved; the door body is further connected with the hole wall through the circumferential fixing mechanism, the overall stability is enhanced, water flow impact is effectively resisted, it is ensured that the blocking door does not move or incline in the high-pressure underwater environment, and rapid and accurate positioning and firm fixing of the blocking door underwater are achieved through the coordination effect of the transverse supporting mechanism and the circumferential fixing mechanism. The sealing mechanism is pressed between the inner wall of the tunnel and the blocking door in combination with flexible sealing and rigid sealing, so that sealing of a gap between the blocking door and the inner wall of the tunnel is achieved.

Description

Technical Field

[0001] This invention relates to the field of underwater sealing technology, and more specifically, to a temporary underwater sealing device and sealing method for a reservoir water conveyance tunnel. Background Technology

[0002] A reservoir water conveyance tunnel is a closed underground passage used in water conservancy projects to transport water resources. It is typically excavated into mountains or underground and its main functions include irrigation, power generation, and water supply. Based on water flow conditions, they can be divided into unpressurized tunnels and pressurized tunnels. Unpressurized tunnels have a free surface for water flow, while pressurized tunnels have water filling the entire cross-section. Their structural design must comprehensively consider topography, geological conditions, and water flow characteristics to ensure safety and practicality. As a key component of reservoir projects, the construction quality of the water conveyance tunnel directly affects the reservoir's functionality; therefore, project quality and reinforcement are particularly important. In engineering practice, the completion of a water conveyance tunnel marks a significant advancement and is of great importance for flood control, water supply, and ecological improvement. The design and construction of water conveyance tunnels must address complex geological conditions. For example, the water conveyance project of Kaihua Reservoir needs to traverse areas with well-developed rock folds and crisscrossing underground water networks, where risks such as mudslides, water inrushes, and collapses are ever-present. Various techniques are often employed during construction, such as drill-and-blast excavation, pipe jacking, and open-cut backfilling, to adapt to different geological and spatial conditions. The completion of the water conveyance tunnel not only ensures the efficient use of water resources, but also provides important support for regional economic development and the improvement of people's livelihoods.

[0003] During tunnel construction, maintenance, or emergency rescue, temporary sealing is often required to cut off water flow and create dry conditions for subsequent operations. Traditional underwater sealing methods often use sandbag stacking, sheet piles, or cast-in-place concrete. However, these methods have problems such as long construction cycles, poor sealing effects, high difficulty in underwater operation, and low reliability. Especially in deep water and high water pressure environments, traditional sealing structures are prone to leakage, displacement, or even failure, which not only affects construction safety but may also delay the overall progress of the project. In addition, existing technologies lack efficient temporary sealing devices and are difficult to adapt to the requirements of different cross-sectional dimensions and complex hydraulic conditions. Summary of the Invention

[0004] In view of this, the present invention proposes an underwater temporary sealing device and sealing method for water conveyance tunnels in reservoirs, aiming to solve the problems of long construction period, poor sealing effect, high operation difficulty, low reliability, and easy leakage failure, especially in deep water and high pressure environment, of existing traditional underwater sealing methods.

[0005] On one hand, the present invention proposes an underwater temporary sealing device for a reservoir water conveyance tunnel. The device includes: a sealing gate; a transverse support mechanism disposed on the sealing gate, with both ends extending to the sides of the sealing gate to laterally support the inner wall of the tunnel, thereby achieving initial support for the sealing gate; a circumferential fixing mechanism disposed along the circumference of the sealing gate, for fixing the outer edge of the sealing gate to the inner wall of the tunnel; and a sealing mechanism disposed along the circumference of the sealing gate on the outer periphery of the sealing gate, for combining flexible sealing and rigid sealing to press between the inner wall of the tunnel and the sealing gate, thereby achieving sealing of the gap between the sealing gate and the inner wall of the tunnel.

[0006] Furthermore, in the aforementioned underwater temporary sealing device for the reservoir water conveyance tunnel, the lateral support mechanism includes: a fixed protective shell; two support columns arranged on the same straight line in a manner that allows them to move towards or away from each other, with adjacent ends of the two support columns located inside the fixed protective shell and opposite ends of the two support columns located on both sides of the fixed protective shell, for laterally supporting the inner walls of the tunnel on both sides of the fixed protective shell; and a drive support assembly located inside the fixed protective shell, with its power output end connected to the two support columns, for driving the two support columns to move towards or away from each other.

[0007] Furthermore, in the aforementioned underwater temporary sealing device for the reservoir water conveyance tunnel, the drive support assembly includes: a transverse rotating rod arranged side-by-side on one side of the support columns, wherein both ends of the transverse rotating rod are respectively connected to the two support columns to form two oppositely arranged ball screw pairs, used to convert the rotation of the transverse rotating rod into the opposite or opposite movement of the two support columns; and a drive member, the power output end of which is arranged at an angle to the transverse rotating rod, and the power output end of the drive member is connected to the middle section of the transverse rotating rod through a steering transmission member, used to convert the rotation of the power output end of the drive member into the rotation of the transverse rotating rod around its axis, thereby driving the two support columns to move in opposite or opposite directions.

[0008] Furthermore, in the aforementioned underwater temporary sealing device for the water conveyance tunnel of the reservoir, the transverse rotating rod has two threaded rod segments with opposite thread directions on both sides of the middle section, and the adjacent ends of the two support columns are provided with sliders. The sliders are sleeved on the threaded rod segments and threadedly connected to the threaded rod segments to form a ball screw pair.

[0009] Furthermore, in the aforementioned underwater temporary sealing device for the water conveyance tunnel of the reservoir, the steering transmission component includes: a worm wheel disposed at the power output end of the driving component and a worm segment disposed on the middle section of the transverse rotating rod, wherein the worm wheel meshes with the worm segment.

[0010] Furthermore, the aforementioned underwater temporary sealing device for the water conveyance tunnel of the reservoir includes a circumferential fixing mechanism comprising: a flexible mounting plate for abutting against and mounting on the inner wall of the tunnel; a rigid mounting plate for detachably mounting on the sealing gate; and a fastening and adjusting assembly connected to the flexible mounting plate and the rigid mounting plate respectively, for adjusting the tension between the two.

[0011] Furthermore, in the aforementioned underwater temporary sealing device for the water conveyance tunnel of the reservoir, the fastening and adjustment assembly includes: a connecting rod; a connecting sleeve rotatably sleeved on the outer periphery of the connecting rod, and the connecting sleeve and the connecting rod are threadedly connected to each other, for realizing the disassembly and connection between the flexible mounting plate and the rigid mounting plate and the adjustment of the tension force.

[0012] Furthermore, the underwater temporary sealing device for the above-mentioned reservoir water conveyance tunnel includes a sealing mechanism comprising: an annular sealing capsule, fitted onto the outer peripheral wall of the sealing gate, for holding gas, so that the annular sealing capsule expands and its outer surface presses against and seals the inner wall of the tunnel, forming a first flexible sealing layer; and an internally hollow annular flexible sleeve, fitted onto the outer peripheral wall of the sealing gate and placed between the annular sealing capsule and the circumferential fixing mechanism, for holding concrete, so that after the concrete inside the annular flexible sleeve solidifies, it presses against and seals the inner wall of the tunnel, forming a second rigid sealing layer.

[0013] Furthermore, in the aforementioned underwater temporary sealing device for the reservoir water conveyance tunnel, the sealing gate has a limiting baffle on the side facing away from the circumferential fixing mechanism, which is used to limit the sealing mechanism so that the sealing mechanism is clamped between the circumferential fixing mechanism and the limiting baffle; the limiting baffle has a supporting back plate on the side facing away from the sealing gate, and the supporting back plate is connected to the sealing gate by a reinforcing column passing through the limiting baffle.

[0014] The underwater temporary sealing device for water conveyance tunnels provided by this invention uses a lateral support mechanism to laterally support the inner wall of the tunnel, thus providing initial support for the sealing gate. A circumferential fixing mechanism further connects the gate to the tunnel wall, enhancing overall stability and effectively resisting water flow impact. This ensures the sealing gate does not shift or tilt in a high-pressure underwater environment. In other words, the coordinated action of the lateral support mechanism and the circumferential fixing mechanism achieves rapid, precise positioning and secure fixing of the sealing gate underwater. A sealing mechanism combining flexible and rigid seals presses between the inner wall of the tunnel and the sealing gate, sealing the gap between them. This improves the sealing reliability and adaptability of the sealing device. In particular, the flexible seal adapts to uneven tunnel walls, and the dual protection of flexible and rigid seals effectively prevents leakage. It is suitable for water conveyance tunnels of different diameters and surface conditions.

[0015] In particular, the sealing mechanism forms the first flexible seal by inflating the annular sealing capsule, which adapts to uneven tunnel walls; the annular flexible sleeve filled with concrete forms the second rigid sealing layer, providing double protection to effectively prevent leakage, and is suitable for water conveyance tunnels with different diameters and surface conditions.

[0016] Furthermore, through the structural design of the limiting baffle and the blocking limiting part, the deformation and displacement of the sealing material, namely concrete and air, are effectively controlled. The limiting baffle constrains the expansion direction of the annular sealing capsule to prevent excessive outward expansion failure, and the blocking limiting part restricts the lateral deformation of the annular flexible sleeve during the concrete pouring process, ensuring the integrity of the sealing layer shape and the uniformity of thickness, thereby improving the long-term stability of the sealing structure.

[0017] On the other hand, this invention proposes a method for temporary underwater sealing of a reservoir water conveyance tunnel, employing the aforementioned temporary underwater sealing device for a reservoir water conveyance tunnel. The method includes the following steps: positioning the temporary sealing device at a predetermined sealing position within the water conveyance tunnel; adjusting the telescopic position of the lateral support mechanism of the temporary sealing device, and using both ends of the lateral support mechanism to laterally support the inner wall of the tunnel, thus achieving initial support for the sealing gate; fixing the outer edge of the sealing gate to the inner wall of the tunnel using a circumferential fixing mechanism to secure the sealing gate; and using a sealing mechanism combining flexible and rigid sealing to press between the inner wall of the tunnel and the sealing gate, thereby sealing the gap between the sealing gate and the inner wall of the tunnel, achieving underwater sealing of the reservoir water conveyance tunnel.

[0018] The effect of the underwater temporary sealing method for water conveyance tunnels in this invention is the same as that of the underwater temporary sealing device for water conveyance tunnels described above, so it will not be repeated here. Attached Figure Description

[0019] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings: Figure 1 This is a schematic diagram of the underwater temporary sealing device for a water conveyance tunnel in a reservoir, provided in an embodiment of the present invention. Figure 2 Another structural schematic diagram of the underwater temporary sealing device for a water conveyance tunnel in a reservoir provided in an embodiment of the present invention; Figure 3 This is a cross-sectional view of an underwater temporary sealing device for a water conveyance tunnel in a reservoir, provided in an embodiment of the present invention. Figure 4 A schematic diagram of the lateral support mechanism provided in an embodiment of the present invention; Figure 5This is a schematic diagram of the circumferential fixing mechanism provided in an embodiment of the present invention; Figure 6 A flowchart illustrating the underwater temporary sealing method for a water conveyance tunnel in a reservoir, as provided in an embodiment of the present invention. Explanation of reference numerals in the attached figures: 1-Blocking door, 2-Horizontal support mechanism, 21-Fixed protective shell, 22-Support column, 23-Drive support assembly, 231-Horizontal rotating rod, 2311-Threaded rod segment, 2312-Worm segment, 232-Drive component, 2321-Rotating shaft, 233-Steering transmission component, 2331-Worm wheel, 234-Bearing seat, 235-Slider, 24-Supporting top plate, 25-Sealing ring, 3-Circumferential fixing mechanism, 31-Flexible mounting plate, 311-First mounting hole, 32-Rigid mounting plate, 321-Second mounting hole, 322-Blocking and limiting part, 33-Fastening and adjusting assembly, 331-Connecting rod, 332-Connecting sleeve, 4-Sealing mechanism, 41-Annular sealing capsule, 411-Inflation pipe, 412-Air valve 42-Annular flexible sleeve, 421-Concrete injection pipe, 422-Check valve, 5-Limiting baffle, 6-Supporting back plate, 61-Reinforcing column. Detailed Implementation

[0020] Exemplary embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the disclosure to those skilled in the art. It should be noted that, unless otherwise specified, the embodiments and features described herein can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0021] Device Example: See Figures 1 to 3 The figure illustrates a preferred structure of an underwater temporary sealing device for a reservoir water conveyance tunnel provided in an embodiment of the present invention. As shown, the device includes: a sealing gate 1, a transverse support mechanism 2, a circumferential fixing mechanism 3, and a sealing mechanism 4.

[0022] A lateral support mechanism 2 is installed on the sealing gate 1, with both ends extending to the sides of the sealing gate 1 to laterally support the inner wall of the tunnel, thus providing initial support for the sealing gate 1. Specifically, the two ends of the lateral support mechanism 2 can be laterally telescopically connected, especially when fixing the sealing gate 1, the two ends of the lateral support mechanism 2 can extend to both sides of the sealing gate 1 (e.g., Figure 1 (as shown on the left and right sides), so that the two ends of the transverse support mechanism 2 can be laterally supported on the inner wall of the tunnel, thereby achieving the initial support of the sealing gate 1.

[0023] The circumferential fixing mechanism 3 is arranged circumferentially along the sealing gate 1 and is used to fix the outer edge of the sealing gate 1 to the inner wall of the tunnel. Specifically, there can be multiple circumferential fixing mechanisms 3, which are arranged at intervals along the circumference of the sealing gate 1 on the outer edge of the sealing gate 1. This not only enables a detachable connection between the outer edge of the sealing gate 1 and the inner wall of the tunnel, but also limits the sealing mechanism 4, preventing the sealing mechanism 4 from being deformed along the thickness direction of the sealing gate 1. In particular, it allows the sealing mechanism 4 to expand outward toward the outer edge of the sealing gate 1 to lift onto the inner wall of the tunnel.

[0024] The sealing mechanism 4 is arranged circumferentially around the sealing door 1 on its outer periphery. It combines flexible and rigid sealing, pressing against the tunnel inner wall and the sealing door 1 to seal the gap between them. Specifically, the sealing mechanism 4 is sleeved around the sealing door 1 on its outer periphery. It can expand radially, abutting against the outer wall of the sealing door 1 and the tunnel inner wall respectively, thus sealing the gap between them. To prevent axial expansion of the sealing mechanism 4 (i.e., along the thickness direction of the sealing door 1), preferably, the side of the sealing door 1 facing away from the circumferential fixing mechanism 3 (e.g., the side opposite to the circumferential fixing mechanism 3) is positioned as follows: Figure 3 A limiting baffle 5 (shown on the left) is provided to limit the sealing mechanism 4, so that the sealing mechanism 4 is clamped between the circumferential fixing mechanism 3 and the limiting baffle 5. This can limit the expansion direction of the sealing mechanism 4 and prevent it from excessively shifting outward, i.e., excessive expansion in the thickness direction, thereby ensuring that the sealing mechanism 4 achieves radial expansion deformation, and thus achieving the sealing of the gap between the sealing door 1 and the tunnel inner wall. In this embodiment, the side of the limiting baffle 5 facing away from the sealing door 1 (e.g., Figure 3 The left side (as shown) is provided with a support back plate 6, which is connected to the blocking door 1 by a support column 22 passing through the limiting baffle 5. The blocking door 1 is located on the side furthest from the circumferential fixing mechanism 3 (e.g., the side away from the circumferential fixing mechanism 3). Figure 3 The left side shown has several reinforcing posts 61 fixedly connected to it, with the ends of the reinforcing posts 61 furthest from the sealing door 1 (e.g., the ends of the reinforcing posts 61 furthest from the sealing door 1). Figure 3 The left end (shown) is fixedly connected to a support back plate 6, which further clamps and stabilizes the sealing door 1 and the limiting baffle 5. In this embodiment, the outer edge of the limiting baffle 5 extends to the outer periphery of the outer edge of the sealing door 1, which can limit the sealing mechanism 4 provided on the outer periphery of the sealing door 1.

[0025] See also Figures 1 to 3The sealing mechanism 4 includes an annular sealing capsule 41 and an annular flexible sleeve 42. The annular sealing capsule 41 is fitted on the outer peripheral wall of the sealing gate 1 and is used to hold gas so that the annular sealing capsule 41 expands and its outer surface presses against and seals the inner wall of the tunnel, forming a first flexible sealing layer. The hollow annular flexible sleeve 42 is fitted on the outer peripheral wall of the sealing gate 1 and is placed between the annular sealing capsule 41 and the circumferential fixing mechanism 3. It is used to hold concrete so that the concrete inside the annular flexible sleeve 42 solidifies and presses against and seals the inner wall of the tunnel, forming a second rigid sealing layer.

[0026] Specifically, the annular sealing capsule 41 can be reliably arranged towards the limiting baffle 5, and the annular flexible sleeve 42 can be disposed between the annular sealing capsule 41 and the circumferential fixing mechanism 3. In this embodiment, the annular sealing capsule 41 is connected to an inflation tube 411, and an air valve 412 is provided on the inflation tube 411 for controlling inflation and deflation. The inflation tube 411 is fixedly installed at the middle of the bottom outer surface of the annular sealing capsule 41, and the interior of the inflation tube 411 is connected to the interior of the annular sealing capsule 41. An air valve 412 is provided inside the inflation tube 411. After inflation, the annular sealing capsule 41 expands and presses against the inner wall of the tunnel, forming the first flexible sealing barrier. The air valve 412 is used to control inflation and deflation to ensure sealing pressure. In this embodiment, the inflation tube 411 can pass through the annular flexible sleeve 42, and the air valve 412 is located at the end of the inflation tube 411 located outside the annular flexible sleeve 42, which facilitates the self-sealing of the interior of the sealing door 1 (e.g., Figure 3 (As shown on the right) for filling and venting control. A concrete injection pipe 421 is fixedly installed at the middle of the top outer surface of the annular flexible sleeve 42. The interior of the concrete injection pipe 421 is connected to the interior of the annular flexible sleeve 42. A check valve 422 is installed inside the concrete injection pipe 421. The concrete injection pipe 421 is used to inject concrete into the annular flexible sleeve 42. After solidification, it forms a second rigid sealing layer. The check valve 422 can effectively prevent concrete backflow and ensure the compactness of the injection and the reliability of the seal.

[0027] See Figure 4 This is a schematic diagram of the transverse support mechanism 2 provided in an embodiment of the present invention. As shown in the figure, the transverse support mechanism 2 includes: a fixed protective shell 21, two support columns 22, and a drive support assembly 23; wherein, the two support columns 22 are arranged on the same straight line in a manner that allows them to move towards each other or away from each other, and the adjacent ends of the two support columns 22 are all located inside the fixed protective shell 21, and the away ends of the two support columns 22 are located on both sides of the fixed protective shell 21, for transversely supporting the inner walls of the tunnels on both sides of the fixed protective shell 21 respectively; the drive support assembly 23 is located inside the fixed protective shell 21, and its power output end is connected to the two support columns 22 for driving the two support columns 22 to move towards each other or away from each other.

[0028] Specifically, the fixed protective housing 21 is hollow inside and can be fixedly installed in the middle position of the inner wall of the sealing door 1. The two side plates of the fixed protective housing 21 (such as...) Figure 4 Each of the left and right side panels (as shown) is provided with a support column 22, and the two support columns 22 are located on the same straight line. Of course, they can also be arranged in parallel on different straight lines. This embodiment is illustrated by setting them on the same straight line. Each support column 22 is slidably inserted through the corresponding side panel, and the opposite ends of each support column 22 (such as...) Figure 4 The left end of the left support column 22 and the right end of the right support column 22 shown are both equipped with support top plates 24, which can be fixedly installed at the ends of the support columns 22 to support the inner wall of the tunnel. In particular, they increase the contact area with the inner wall of the tunnel, thereby enhancing the stability of the support and preventing slippage. A drive support assembly 23 is fixedly installed at the middle of the bottom of the inner cavity of the fixed protective shell 21. Its power output end is respectively connected to the two support columns 22 for transmission. It can drive the two support columns 22 to move towards each other or away from each other. That is, the movement away from each other can gradually increase the distance between the two support top plates 24 until they support the inner wall of the tunnel. The movement towards each other can gradually decrease the distance between the tops of the two supports and retract them into the fixed protective shell 21 to achieve disassembly. In this embodiment, a sealing ring 25 is provided at the sliding connection between the support column 22 and the fixed protective shell 21. That is, through holes are provided on the left and right side plates of the fixed protective shell 21 for installing two support columns 22. The sealing ring 25 is fixedly installed at the through holes on both sides of the fixed protective shell 21. The outer surface of the support column 22 penetrates the inner ring of the sealing ring 25. The sealing ring 25 plays a dynamic sealing role to prevent water from entering the interior of the fixed protective shell 21. The fixed protective shell 21 serves to accommodate and protect the internal transmission components, preventing external interference with the movement of the drive support assembly 23 and ensuring the stability of the movement and support of the transverse support mechanism 2.

[0029] See also Figure 4 The drive support assembly 23 includes: a transverse rotating rod 231, a drive member 232, and a steering transmission member 233; wherein, the transverse rotating rod 231 is arranged side by side on one side of the support column 22, and the two ends of the transverse rotating rod 231 are respectively connected to the two support columns 22 to form two oppositely arranged ball screw pairs, which are used to convert the rotation of the transverse rotating rod 231 into the opposite or opposite movement of the two support columns 22; the drive member 232 has its power output end arranged at an angle to the transverse rotating rod 231, and the power output end of the drive member 232 is connected to the middle section of the transverse rotating rod 231 through the steering transmission member 233, which is used to convert the rotation of the power output end of the drive member 232 into the rotation of the transverse rotating rod 231 around its axis, so as to drive the two support columns 22 to move towards or away from each other.

[0030] Specifically, the transverse rotating rod 231 is rotatably mounted inside the fixed protective housing 21 and arranged parallel to the lower side of the two support columns 22. The transverse rotating rod 231 may have a three-section structure, with the middle section serving as the power output end, and the two side sections (such as...) Figure 4 The left and right ends (shown as power output ends) are respectively connected to the support column 22 to form two oppositely arranged ball screw pairs. To improve the stability of the transverse rotating rod 231, preferably, at least two bearing seats 234 are installed on the bottom of the inner cavity of the fixed protective shell 21, i.e., the base plate. The transverse rotating rod 231 is rotatably passed through each bearing seat 234 to provide rotational support through the bearing seats 234, i.e., to provide stable rotational support. In this embodiment, two bearing seats 234 are used as an example. The two bearing seats 234 can be symmetrically arranged on both ends inside the fixed protective shell 21 to provide rotational support for both ends of the transverse rotating rod 231. The driving component 232 can be a drive motor, and its output shaft can be provided with a rotating shaft 2321. The rotating shaft 2321 is arranged at an angle with the transverse rotating rod 231, especially it can be arranged perpendicularly. Furthermore, the middle section of the rotating shaft 2321 and the transverse rotating rod 231 is connected by a steering transmission component 233 to convert the rotation of the power output end of the driving component 232 into the rotation of the transverse rotating rod 231 around its axis, so as to drive the two support columns 22 to move towards each other or away from each other through the ball screw pair.

[0031] See also Figure 4 The transverse rotating rod 231 has two threaded rod segments 2311 with opposite thread directions on both sides of the middle section. Each adjacent end of the two support columns 22 has a slider 235, which is sleeved on and threadedly connected to the threaded rod segments 2311, forming a ball screw pair. Specifically, the two end sections of the transverse rotating rod 231 are threaded rod segments 2311, with the threads of the two threaded rod segments 2311 arranged in opposite directions. The outer surfaces of the two threaded rod segments 2311 are threaded with sliders 235, which are slidably mounted on the inner wall of the fixed protective housing 21. The sliders 235 can be limited by the guide structure within the fixed protective housing 21, allowing them to reciprocate linearly along the axial direction of the transverse rotating rod 231. The outer surfaces of the two sliders 235 are fixedly connected to the two support columns 22 respectively. In this embodiment, the threads of the two threaded rod segments 2311 are arranged in opposite directions. When the transverse rotating rod 231 rotates, the two sliders 235 can move towards each other or away from each other, thereby driving the two support columns 22 to move towards each other or away from each other synchronously with the two sliders 235.

[0032] See also Figure 4The steering transmission component 233 includes a worm gear 2331 disposed at the power output end of the drive component 232 and a worm segment 2312 disposed on the middle section of the transverse rotating rod 231, wherein the worm gear 2331 meshes with the worm segment 2312. Specifically, the worm gear 2331 is fixedly mounted on the outer surface of the rotating shaft 2321, and a worm is meshed above the worm gear 2331. The worm and the two threaded rod segments 2311 on both sides can be integrated into a single structure to form the transverse rotating rod 231.

[0033] See Figure 5 The following is a schematic diagram of the circumferential fixing mechanism 3 provided in an embodiment of the present invention. As shown in the figure, the circumferential fixing mechanism 3 includes: a flexible mounting plate 31, a rigid mounting plate 32, and a fastening adjustment assembly 33; wherein, the flexible mounting plate 31 is used to abut against and be installed on the inner wall of the tunnel; the rigid mounting plate 32 is detachably installed on the sealing door 1; the fastening adjustment assembly 33 is connected to the flexible mounting plate 31 and the rigid mounting plate 32 respectively, and is used to adjust the tension between the two.

[0034] Specifically, the flexible mounting plate 31 can be an elastic mounting plate, and the flexible mounting plate 31 may be provided with first mounting holes 311. The first mounting holes 311 are symmetrically arranged at both ends of the flexible mounting plate 31, especially on both sides of the connecting rod 331 of the fastening and adjusting assembly 33 (e.g., Figure 5 (As shown on the left and right sides), the rigid mounting plate 32 has an opening for a second mounting hole 321. The rigid mounting plate 32 is fixedly mounted on the outer surface of the sealing door 1 by screws at the second mounting hole 321. The first mounting hole 311 and the second mounting hole 321 facilitate installation and adjustment by bolts, realizing the fixation of the flexible mounting plate 31 to the tunnel wall and the reliable connection between the rigid mounting plate 32 and the sealing door 1. In this embodiment, the rigid mounting plate 32 and the flexible mounting plate 31 can be arranged vertically to press against the sealing door 1 and the inner wall of the tunnel, respectively. To limit the sealing mechanism 4, preferably, the end of the rigid mounting plate 32 closest to the flexible mounting plate 31 (e.g., Figure 5 The bottom end shown is provided with a blocking and limiting part 322 to limit and block the displacement of the flexible sleeve. The blocking and limiting part 322 can be a plate-shaped structure, which can be an integral structure with the rigid mounting plate 32. The flexible mounting plate 31 and the rigid mounting plate 32 are connected by a fastening and adjusting assembly 33, which can adjust the distance between the flexible mounting plate 31 and the rigid mounting plate 32, especially the tension between them, thereby strengthening the fixing effect of the sealing door 1.

[0035] See also Figure 5The fastening and adjusting assembly 33 includes a connecting rod 331 and a connecting sleeve 332. The connecting sleeve 332 is rotatably sleeved on the outer periphery of the connecting rod 331, and the connecting sleeve 332 and the connecting rod 331 are threadedly connected to each other, for realizing the disassembly and connection between the flexible mounting plate 31 and the rigid mounting plate 32 and the adjustment of the tension force. Specifically, the connecting rod 331 can be fixedly installed on the flexible mounting plate 31 and arranged perpendicular to the flexible mounting plate 31; the connecting sleeve 332 is rotatably installed on the rigid mounting plate 32. The connecting rod 331 can be a threaded rod, and the inner wall of the connecting sleeve 332 is provided with an internal thread adapted to the connecting rod 331. The connecting rod 331 and the connecting sleeve 332 are threadedly connected to realize the connection, and the tension force of the flexible mounting plate 31 and the rigid mounting plate 32 can be adjusted by screwing.

[0036] The working principle of the device is as follows: First, the sealing gate 1 is transported to the predetermined underwater sealing position and initially positioned. Then, the drive component 232 in the transverse support mechanism 2 is activated, which drives the worm gear 2331 to rotate via the rotating shaft 2321. This, in turn, drives the worm segment 2312 that meshes with it to rotate. The threaded rod segments 2311 at both ends of the worm segment 2312 rotate accordingly, pushing the slider 235 to move outward along the threaded rod segments 2311. This causes the two support columns 22 to move towards each other, i.e., the support columns 22 extend outward. Finally, the support top plate 24 presses against the inner wall of the tunnel, achieving initial support and centering of the sealing gate 1. Then, the circumferential fixing mechanism 3 is operated. First, the flexible mounting plate 31 is fixed to the inner wall of the tunnel through the first mounting hole 311. Then, the connecting rod 331 is screwed in to connect it to the connecting sleeve 332. Finally, the rigid mounting plate 32 is installed on the sealing gate through the second mounting hole 321. The door 1 is further firmly fixed, and the blocking and limiting part 322 of the rigid mounting plate 32 can effectively prevent the flexible sleeve of the subsequently injected concrete from shifting. After the mechanical fixation is completed, air is injected into the reversing sealing capsule through the air inflator 411, causing it to expand and fit tightly against the inner wall of the tunnel, forming a preliminary flexible seal. During this process, the limiting baffle 5 can restrict the expansion direction of the annular sealing capsule 41 and prevent it from moving outward excessively. Finally, concrete is injected into the annular flexible sleeve 42 through the concrete injection pipe 421. The concrete fills the annular flexible sleeve 42 and gradually solidifies, eventually forming a rigid sealing layer, which together with the annular sealing capsule 41 constitutes a reliable double sealing system. The check valve 422 can prevent the concrete from flowing back and ensure that the injection process is continuous and effective, thereby achieving safe and reliable temporary sealing of the water conveyance tunnel in the underwater environment.

[0037] In summary, the underwater temporary sealing device for a reservoir water conveyance tunnel provided in this embodiment uses a transverse support mechanism 2 to laterally support the inner wall of the tunnel, thus providing initial support for the sealing gate 1. A circumferential fixing mechanism 3 further connects the gate to the tunnel wall, enhancing overall stability and effectively resisting water flow impact, ensuring that the sealing gate 1 does not shift or tilt in a high-pressure underwater environment. In other words, the coordinated action of the transverse support mechanism 2 and the circumferential fixing mechanism 3 achieves rapid, precise positioning and secure fixing of the sealing gate 1 underwater. A sealing mechanism 4, combining flexible and rigid sealing, presses between the inner wall of the tunnel and the sealing gate 1 to seal the gap between them, improving the sealing reliability and adaptability of the sealing device. In particular, the flexible sealing adapts to uneven tunnel walls, and the dual protection of flexible and rigid sealing effectively prevents leakage, making it suitable for water conveyance tunnels of different diameters and surface conditions.

[0038] In particular, the sealing mechanism 4 forms the first flexible seal by inflating the annular sealing capsule 41, which adapts to uneven tunnel walls; the annular flexible sleeve 42 filled with concrete forms the second rigid sealing layer, providing double protection to effectively prevent leakage, and is suitable for water conveyance tunnels with different diameters and surface conditions.

[0039] Furthermore, through the structural design of the limiting baffle 5 and the blocking limiting part 322, the deformation and displacement of the sealing material, namely concrete and air, are effectively controlled. The limiting baffle 5 constrains the expansion direction of the annular sealing capsule 41 to prevent excessive outward expansion failure. The blocking limiting part 322 restricts the lateral deformation of the annular flexible sleeve 42 during the concrete pouring process, ensuring the integrity of the sealing layer shape and the uniformity of thickness, thereby improving the long-term stability of the sealing structure.

[0040] Method Implementation Examples: See Figure 6 This is a flowchart illustrating the underwater temporary sealing method for a reservoir water conveyance tunnel provided in this embodiment of the invention. The method utilizes the aforementioned underwater temporary sealing device for the reservoir water conveyance tunnel for sealing construction. As shown in the figure, the method includes the following steps: Step S1: Position the temporary sealing device at the predetermined sealing location of the water conveyance tunnel.

[0041] Specifically, the sealing gate 1 is positioned at the predetermined sealing location of the water conveyance tunnel.

[0042] Step S2: Adjust the telescopic position of the lateral support mechanism 2 of the temporary sealing device, and use the two ends of the lateral support mechanism 2 to laterally support the inner wall of the tunnel to achieve the initial support of the sealing gate 1.

[0043] Specifically, the drive component 232 in the transverse support mechanism 2 is activated, which drives the worm wheel 2331 to rotate via the rotating shaft 2321, thereby driving the worm segment 2312 meshing with it to rotate. The threaded rod segments 2311 at both ends of the worm segment 2312 rotate accordingly, pushing the slider 235 to move outward along the threaded rod segment 2311, thereby causing the two support columns 22 to move towards each other, that is, the support columns 22 extend outward, and finally, through the support top plate 24, they press against the inner wall of the tunnel, achieving the initial support and centering of the sealing gate 1.

[0044] In step S3, the outer edge of the sealing door 1 is fixedly installed on the inner wall of the tunnel by the circumferential fixing mechanism 3 to fix the sealing door 1.

[0045] Specifically, by operating the circumferential fixing mechanism 3, the flexible mounting plate 31 is first fixed to the inner wall of the tunnel through the first mounting hole 311, and then the connecting rod 331 is screwed in to make it threadedly connected to the connecting sleeve 332. The rigid mounting plate 32 is then installed on the sealing door 1 through the second mounting hole 321, thereby further securing the sealing door 1. At the same time, the blocking and limiting part 322 of the rigid mounting plate 32 can effectively prevent the flexible sleeve injected with concrete from shifting.

[0046] In step S4, the sealing mechanism 4, combining flexible and rigid seals, is pressed between the tunnel inner wall and the sealing door 1 to seal the gap between the sealing door 1 and the tunnel inner wall, thereby achieving underwater sealing of the reservoir water conveyance tunnel.

[0047] Specifically, after mechanical fixation is completed, air is inflated into the reversing sealing capsule through the air inflator 411, causing it to expand and fit tightly against the inner wall of the tunnel, forming a preliminary flexible seal. During this process, the limiting baffle 5 can restrict the expansion direction of the annular sealing capsule 41 and prevent it from moving outward excessively. Finally, concrete is pressure-injected into the annular flexible sleeve 42 through the concrete injection pipe 421. The concrete fills the annular flexible sleeve 42 and gradually solidifies, eventually forming a rigid sealing layer. Together with the annular sealing capsule 41, it constitutes a reliable double sealing system. The check valve 422 can prevent concrete backflow and ensure that the injection process is continuous and effective, thereby achieving safe and reliable temporary sealing of the water conveyance tunnel in the underwater environment.

[0048] In summary, the underwater temporary sealing method for water conveyance tunnels provided in this embodiment uses a transverse support mechanism 2 to laterally support the inner wall of the tunnel, thus providing initial support for the sealing gate 1. A circumferential fixing mechanism 3 further connects the gate to the tunnel wall, enhancing overall stability and effectively resisting water flow impact, ensuring that the sealing gate 1 does not shift or tilt in a high-pressure underwater environment. In other words, the coordinated action of the transverse support mechanism 2 and the circumferential fixing mechanism 3 achieves rapid, precise positioning and secure fixing of the sealing gate 1 underwater. A sealing mechanism 4, combining flexible and rigid sealing, presses between the inner wall of the tunnel and the sealing gate 1 to seal the gap between them, improving the sealing reliability and adaptability of the sealing device. In particular, the flexible sealing adapts to uneven tunnel walls, and the dual protection of flexible and rigid sealing effectively prevents leakage, making it suitable for water conveyance tunnels of different diameters and surface conditions.

[0049] In particular, the sealing mechanism 4 forms the first flexible seal by inflating the annular sealing capsule 41, which adapts to uneven tunnel walls; the annular flexible sleeve 42 filled with concrete forms the second rigid sealing layer, providing double protection to effectively prevent leakage, and is suitable for water conveyance tunnels with different diameters and surface conditions.

[0050] Furthermore, through the structural design of the limiting baffle 5 and the blocking limiting part 322, the deformation and displacement of the sealing material, namely concrete and air, are effectively controlled. The limiting baffle 5 constrains the expansion direction of the annular sealing capsule 41 to prevent excessive outward expansion failure. The blocking limiting part 322 restricts the lateral deformation of the annular flexible sleeve 42 during the concrete pouring process, ensuring the integrity of the sealing layer shape and the uniformity of thickness, thereby improving the long-term stability of the sealing structure.

[0051] It should be noted that in the description of this invention, the terms "upper", "lower", "left", "right", "inner", "outer", etc., which indicate directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. This is only for the convenience of description and is not intended to indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this invention.

[0052] Furthermore, it should be noted that, in the description of this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0053] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A temporary underwater sealing device for a reservoir water conveyance tunnel, characterized in that, include: Block the door; A lateral support mechanism is installed on the sealing gate, with both ends extending to the sides of the sealing gate to laterally support the inner wall of the tunnel, so as to achieve initial support for the sealing gate; A circumferential fixing mechanism is provided along the circumference of the sealing door and is used to fix the outer edge of the sealing door to the inner wall of the tunnel. A sealing mechanism is disposed around the outer periphery of the sealing door, and is used to combine flexible and rigid seals to press between the inner wall of the tunnel and the sealing door, so as to seal the gap between the sealing door and the inner wall of the tunnel.

2. The underwater temporary sealing device for a reservoir water conveyance tunnel according to claim 1, characterized in that, The lateral support mechanism includes: Fixed protective casing; Two support columns are arranged on the same straight line in a manner that allows them to move towards each other or away from each other. The adjacent ends of the two support columns are located inside the fixed protective shell, and the away ends of the two support columns are located on both sides of the fixed protective shell, for laterally supporting the inner walls of the tunnels on both sides of the fixed protective shell. A drive support assembly is disposed inside the fixed protective shell, and its power output end is connected to the two support columns to drive the two support columns to move towards each other or away from each other.

3. The underwater temporary sealing device for a reservoir water conveyance tunnel according to claim 2, characterized in that, The drive support component includes: A transverse rotating rod is arranged side by side with one side of the support column, and the two ends of the transverse rotating rod are respectively connected to the two support columns to form two oppositely arranged ball screw pairs, which are used to convert the rotation of the transverse rotating rod into the opposite or opposite movement of the two support columns. The driving component has its power output end arranged at an angle to the transverse rotating rod, and the power output end of the driving component is connected to the middle section of the transverse rotating rod through a steering transmission component. This is used to convert the rotation of the power output end of the driving component into the rotation of the transverse rotating rod around its axis, so as to drive the two support columns to move towards each other or away from each other.

4. The underwater temporary sealing device for a reservoir water conveyance tunnel according to claim 3, characterized in that, The transverse rotating rod has two threaded rod segments with opposite thread directions on both sides of the middle section. The adjacent ends of the two support columns are provided with sliders. The sliders are sleeved on the threaded rod segments and threadedly connected to the threaded rod segments to form a ball screw pair.

5. The underwater temporary sealing device for a reservoir water conveyance tunnel according to claim 3, characterized in that, The steering transmission component includes: a worm wheel disposed at the power output end of the drive component and a worm segment disposed on the middle section of the transverse rotating rod, wherein the worm wheel meshes with the worm segment.

6. The underwater temporary sealing device for a reservoir water conveyance tunnel according to any one of claims 1 to 5, characterized in that, The circumferential fixing mechanism includes: Flexible mounting plate, used to abut against and install on the inner wall of the tunnel; A rigid mounting plate is detachably mounted on the sealing door; The fastening adjustment assembly is connected to the flexible mounting plate and the rigid mounting plate respectively, and is used to adjust the tension between the two.

7. The underwater temporary sealing device for a reservoir water conveyance tunnel according to claim 6, characterized in that, The fastening adjustment assembly includes: Connecting rod; A connecting sleeve is rotatably fitted onto the outer periphery of the connecting rod, and the connecting sleeve is threadedly connected to the connecting rod, for realizing the disassembly connection and tension adjustment between the flexible mounting plate and the rigid mounting plate.

8. The underwater temporary sealing device for a reservoir water conveyance tunnel according to any one of claims 1 to 5, characterized in that, The sealing mechanism includes: An annular sealing capsule is fitted onto the outer peripheral wall of the sealing gate to hold gas, so that the annular sealing capsule expands and its outer surface presses against and seals the inner wall of the tunnel, forming the first flexible sealing layer. An internally hollow annular flexible sleeve is fitted onto the outer peripheral wall of the sealing gate and placed between the annular sealing capsule and the circumferential fixing mechanism. It is used to hold concrete so that after the concrete inside the annular flexible sleeve solidifies, it presses against and seals the inner wall of the tunnel, forming a second rigid sealing layer.

9. The underwater temporary sealing device for a reservoir water conveyance tunnel according to any one of claims 1 to 5, characterized in that, The sealing door is provided with a limiting baffle on the side opposite to the circumferential fixing mechanism, which is used to limit the sealing mechanism so that the sealing mechanism is clamped between the circumferential fixing mechanism and the limiting baffle. The limiting baffle is provided with a supporting back plate on the side facing away from the blocking door, and the supporting back plate is connected to the blocking door by a reinforcing column passing through the limiting baffle.

10. A method for temporary underwater sealing of a reservoir water conveyance tunnel, characterized in that, The underwater temporary sealing device for a reservoir water conveyance tunnel as described in any one of claims 1 to 9 is characterized by comprising the following steps: The temporary sealing device is positioned at the predetermined sealing location of the water conveyance tunnel; The lateral support mechanism of the temporary sealing device is extended and retracted, and the two ends of the lateral support mechanism are laterally supported against the inner wall of the tunnel to achieve the initial support of the sealing gate. The outer edge of the sealing door is fixedly installed on the inner wall of the tunnel by a circumferential fixing mechanism to secure the sealing door. By combining flexible and rigid seals, a sealing mechanism is used to press between the inner wall of the tunnel and the sealing gate, thereby sealing the gap between the sealing gate and the inner wall of the tunnel and achieving underwater sealing of the reservoir water conveyance tunnel.

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