Underwater pipe culvert plugging device

Abstract

The application discloses an underwater pipe culvert plugging device, and belongs to the technical field of underwater construction. The underwater pipe culvert plugging device comprises a plugging well and a plugging assembly. The plugging well is arranged at the top of the pipe culvert. A connecting port is arranged at the bottom of the plugging well. The connecting port is connected with the plugging well and the pipe culvert. The plugging assembly comprises a gate frame and two plugging gates. The gate frame extends into the pipe culvert from the plugging well through the connecting port. The two plugging gates are detachably connected to the opposite sides of the gate frame. The plugging gate and the gate frame extend along the radial direction of the pipe culvert. The plugging gate can plug the cross section of the pipe culvert. The plugging gate and the gate frame jointly form a containing cavity for filling concrete. The gate frame can position and fix the plugging gate, reduces the interference of water flow on the installation process, and facilitates the installation of the plugging gate to the corresponding position to plug the cross section of the pipe culvert. Meanwhile, the poured concrete can further seal the pipe culvert, and the sealing performance is high.

Description

Technical Field

[0001] This invention relates to the field of underwater construction technology, and in particular to an underwater culvert sealing device. Background Technology

[0002] The discharge of circulating water from power plants is a crucial aspect of power plant operations, involving the recycling of water after the power generation process or its discharge into new marine discharge channels. This process typically involves switching from old to new marine discharge channels to improve efficiency and protect the environment.

[0003] Switching the power plant's circulating water discharge from the old discharge culvert to the new discharge culvert requires sealing off the old one. Traditional sealing operations typically require shutting down the power plant to eliminate water flow in the old discharge culvert, making installation and sealing easier. However, this leads to production interruptions and reduces the power plant's operational efficiency.

[0004] Therefore, considering the power plant's operating costs and the stability of continuous power supply, the power plant will not shut down when sealing the old discharge culvert. Consequently, the sealing device will be continuously impacted by water flow during installation, making its positioning difficult. Furthermore, to facilitate installation within the old discharge culvert, the sealing device is generally slightly smaller than its inner diameter. This results in gaps between the sealing device and the inner wall of the old discharge culvert, preventing a tight fit and leading to poor watertightness, thus affecting the sealing effect. Summary of the Invention

[0005] The purpose of this invention is to provide an underwater pipe culvert sealing device to solve the technical problems of difficulty in installing the sealing device in place and poor sealing effect of the sealing device in the prior art.

[0006] Based on the above concept, the technical solution adopted by this invention is as follows:

[0007] An underwater culvert sealing device, comprising:

[0008] A sealing well is installed at the top of the culvert, and a connection port is opened at the bottom of the sealing well, which connects the sealing well and the culvert.

[0009] The sealing assembly includes a gate frame and two sealing gates. The gate frame extends from the sealing well through the connection port into the culvert. The two sealing gates are detachably connected to opposite sides of the gate frame. Both the sealing gates and the gate frame extend radially along the culvert. The sealing gates are capable of sealing the accommodating cavity and the cross-section of the culvert. The sealing gates and the gate frame together enclose an accommodating cavity for filling with concrete.

[0010] The gate frame has two mounting end faces, which are arranged parallel to each other along the extension direction of the culvert. The mounting end faces abut against the inner wall of the connection port, and the sealing gate is disposed on the mounting end face.

[0011] The gate frame has a limiting channel that extends vertically through the gate frame and extends within the mounting end face. The blocking gate passes through the limiting channel.

[0012] The sealing gate is plate-shaped, with the side of the sealing gate closest to the accommodating cavity along the extension direction of the culvert being the inner end face, and the side of the sealing gate away from the accommodating cavity being the outer end face, which is flush with the mounting end face.

[0013] The sealing assembly further includes a limiting plate, which is connected to the gate frame and is sandwiched between the gate frame and the inner wall of the sealing well.

[0014] The sealing assembly further includes a sealing plate, and the sealing gate is provided with an installation flange located inside the sealing well. The sealing plate is connected to the installation flange and abuts against the top of the culvert.

[0015] The gate frame is provided with a support member on its outer periphery, and the support member is connected to the inner wall of the sealing well.

[0016] It also includes: a sealing assembly, with a set of sealing assemblies provided for each of the sealing gates, the sealing assembly including two sealing plates spaced apart, the sealing plates being slidably connected to the gate frame, and the two sealing plates being able to extend to both sides of the sealing gate to seal the gap between the sealing gate and the inner wall of the culvert.

[0017] The sealing assembly further includes a telescopic rod, which is disposed between the two sealing plates and connected to the sealing plates. The telescopic rod is configured to drive the sealing plates to slide.

[0018] Each sealing assembly includes three telescopic rods, which are spaced apart along the height of the sealing gate.

[0019] The beneficial effects of this invention are:

[0020] The underwater culvert sealing device proposed in this invention first involves pouring a sealing well at the top of the culvert. After the sealing well is completed, a connection port is opened at the bottom of the sealing well, connecting the sealing well and the culvert. A gate frame is then hoisted into the culvert through the connection port. After the gate frame is installed, the sealing gates are installed on the gate frame. Two sealing gates are detachably connected to opposite sides of the gate frame, allowing the sealing gates to seal the cross-section of the culvert and block the flow of water inside. Concrete is then poured into the cavity formed by the sealing gates and the gate frame, thus completely sealing the culvert. The gate frame positions and fixes the sealing gates, reducing water flow interference during installation and facilitating their placement in the correct position to seal the culvert's cross-section. Simultaneously, the poured concrete further seals the culvert, resulting in high sealing performance and improved sealing effectiveness. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of the sealing well and culvert provided by the present invention;

[0022] Figure 2 This is a cross-sectional view of the sealing well and culvert provided by the present invention;

[0023] Figure 3 This is a schematic diagram of the underwater pipe culvert sealing device provided by the present invention;

[0024] Figure 4 This is a cross-sectional view of the underwater culvert sealing device provided by the present invention in conjunction with the culvert. Figure 1 ;

[0025] Figure 5 yes Figure 4 A magnified view of point A;

[0026] Figure 6 This is a cross-sectional view of the underwater culvert sealing device provided by the present invention. Figure 2 ;

[0027] Figure 7 This is a schematic diagram of the gate frame provided by the present invention;

[0028] Figure 8 This is a schematic diagram of the sealing gate provided by the present invention;

[0029] Figure 9 This is a schematic diagram of the sealing assembly provided by the present invention.

[0030] In the picture:

[0031] 100. Culvert;

[0032] 10. Sealing well; 11. Connection port;

[0033] 20. Gate frame; 201. Mounting end face; 202. Limiting channel; 21. Bearing component; 211. Bearing rod; 212. Bearing plate; 22. Support rod; 23. Reinforcing rod;

[0034] 30. Blocking the gate; 31. Reinforcing ribs; 32. Installing the flange;

[0035] 40. Sealing assembly; 41. Telescopic rod; 42. Sealing plate;

[0036] 50. Limit plate;

[0037] 60. Enclosed panel. Detailed Implementation

[0038] Embodiments of the present invention are described in detail below. Examples of these embodiments are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0039] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0040] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0041] The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0042] This invention provides an underwater culvert sealing device that can complete the sealing process of culvert 100 without shutting down the power plant, thereby improving the operating efficiency of the power plant. At the same time, it can ensure accurate sealing position and has high sealing performance.

[0043] See Figures 1 to 6 The underwater culvert plugging device provided in this embodiment includes a plugging well 10 and a plugging assembly. The plugging well 10 is located at the top of the culvert 100, and a connection port 11 is provided at the bottom of the plugging well 10, which connects the plugging well 10 and the culvert 100. The plugging assembly includes a gate frame 20 and two plugging gates 30. The gate frame 20 extends from the plugging well 10 through the connection port 11 into the culvert 100. The two plugging gates 30 are detachably connected to opposite sides of the gate frame 20. Both the plugging gates 30 and the gate frame 20 extend radially along the culvert 100. The plugging gates 30 can block the cross-section of the culvert 100. The plugging gates 30 and the gate frame 20 together form a cavity for filling with concrete.

[0044] In use, firstly, a sealing well 10 is poured at the top of the culvert 100. After the sealing well 10 is poured, a connection port 11 is opened at the bottom of the sealing well 10, so that the connection port 11 connects the sealing well 10 and the culvert 100. Then, the gate frame 20 is hoisted into the culvert 100 through the connection port 11. After the gate frame 20 is installed, the sealing gate 30 is installed on the gate frame 20. The two sealing gates 30 are detachably connected to the opposite sides of the gate frame 20, so that the sealing gates 30 seal the cross-section of the culvert 100 and block the flow of water in the culvert 100. Then, concrete is poured into the cavity formed by the sealing gate 30 and the gate frame 20, thereby completely sealing the culvert 100. The gate frame 20 can position and fix the sealing gate 30, reducing the interference of water flow on the installation process, so that the sealing gate 30 can be installed in the corresponding position to seal the cross-section of the culvert. At the same time, in conjunction with the poured concrete, the culvert 100 is further sealed, which has a high sealing performance and improves the sealing effect.

[0045] See Figure 1 and Figure 2 Regarding the pouring process of the sealing well 10, firstly, a formwork for the sealing well 10 is erected on top of the culvert 100. After the formwork is erected, concrete is poured into the formwork. After the concrete cools and solidifies, the formwork is removed, completing the pouring of the sealing well 10. Afterwards, construction workers enter the sealing well 10 and cut the top of the culvert 100 to the required dimensions using gas cutting, forming a connection opening 11. The cut portion is then lifted out of the sealing well 10. It is worth noting that the size of the connection opening 11 should be slightly smaller than the cross-sectional size of the well opening of the sealing well 10, so that a portion of the pipe wall remains on the top of the culvert 100 around the outer periphery of the connection opening 11. This facilitates the contact between the sealing gate 30 and the top of the culvert 100, improving the stability of the sealing gate 30.

[0046] When installing the gate frame 20, it is generally hoisted from the sealing well 10 into the culvert 100 from top to bottom through the connection port 11, ensuring that the bottom of the gate frame 20 abuts against the inner bottom wall of the culvert 100. Part of the gate frame 20 is located inside the culvert 100, part inside the sealing well 10, and part inside the connection port 11. The external dimensions of the gate frame 20 are matched to the dimensions of the connection port 11 to minimize the gap between them. In actual construction, if the dimensions of the gate frame 20 are made exactly the same as the dimensions of the connection port 11, an interference fit will occur during installation, making the gate frame 20 difficult to install or causing friction with the inner wall of the culvert 100, resulting in damage. Therefore, there should be a certain gap between the gate frame 20 and the inner wall of the culvert 100 to facilitate assembly and disassembly. At the same time, in order to ensure airtightness, the gap should not be too large. Generally speaking, the gap distance should be between 2mm and 10mm.

[0047] See Figure 3 , Figure 4 and Figure 7 The gate frame 20 has two mounting end faces 201, which are parallel and spaced apart along the extension direction of the culvert 100. The mounting end faces 201 abut against the inner wall of the connection port 11, and the sealing gate 30 is mounted on the mounting end faces 201. By abutting the mounting end faces 201 against the inner wall of the connection port 11, vibration and displacement of the gate frame 20 during use are reduced, improving the structural stability of the gate frame 20. By mounting the sealing gate 30 on the mounting end faces 201, the sealing gate 30 can be positioned, and the abutment between the mounting end faces 201 and the inner wall of the connection port 11 improves the sealing performance of the sealing gate 30.

[0048] Since the blocking gate 30 and the gate frame 20 are detachably connected, in some embodiments, the blocking gate 30 can be bolted to the gate frame 20 or snapped on. In this embodiment, a limiting channel 202 is provided on the gate frame 20, which extends vertically through the gate frame 20 and extends within the mounting end face 201. The blocking gate 30 passes through the limiting channel 202. Thus, when installing the blocking gate 30, it is inserted from the top of the gate frame 20 into the limiting channel 202. Under its own weight, the blocking gate 30 slides down the limiting channel 202 to the bottom of the gate frame 20. It facilitates the disassembly and assembly of the sealing gate 30. At the same time, the limiting channel 202 can limit the sealing gate 30, preventing the sealing gate 30 from shifting due to the impact of water flow and affecting the sealing effect, and also improving the stability of the sealing gate 30.

[0049] See Figure 3 and Figure 4 To improve the stability of the gate frame 20, a bearing member 21 is provided on the outer periphery of the gate frame 20, and the bearing member 21 is connected to the inner wall of the sealing well 10. Specifically, the bearing member 21 includes a bearing rod 211 and a bearing plate 212. One end of the bearing rod 211 is connected to the gate frame 20 located inside the sealing well 10, and the other end is connected to the bearing plate. The bearing plate 212 is also bolted to the inner wall of the sealing well 10. This can prevent the gate frame 20 from vibrating or shifting due to water flow impact, thus exhibiting high stability.

[0050] In this embodiment, multiple support members 21 are provided, with each support member 21 arranged in pairs. These multiple pairs of support members 21 are distributed on both sides of the gate frame 20 and are evenly spaced vertically, thus distributing the stress and improving service life. Simultaneously, the two support members 21 in the same pair are arranged horizontally at intervals in a triangular configuration, which not only distributes the stress but also provides high stability. Furthermore, multiple auxiliary rods are provided between the two support members 211, thereby increasing the strength of the support members 21.

[0051] During installation, the support component 21 can be connected to the inner wall of the sealing well 10 first, and then the sealing gate 30 can be installed to ensure that the sealing gate 30 is accurately positioned and to improve the sealing effect.

[0052] In addition, the sealing assembly also includes a limiting plate 50, see [link / reference] Figure 3 The limiting plate 50 is connectable to the gate frame 20. The limiting plate 50 is sandwiched between the gate frame 20 and the inner wall of the sealing well 10, so that one end of the limiting plate 50 connects to the gate frame 20, and the bottom of the limiting plate 50 abuts against the top wall of the box culvert 100. Furthermore, a rubber layer is provided at the contact point between the limiting plate 50 and the box culvert 100, which provides a sealing effect, preventing water from seeping out from the gap between the gate frame 20 and the connection port 11, thus improving the sealing performance. It also prevents the gate frame 20 from vibrating and displacing due to water flow impact, further improving the stability of the gate frame 20. In this embodiment, the limiting plate 50 is welded to the gate frame 20, thereby facilitating higher stability.

[0053] In this embodiment, the connection port 11 is rectangular, and the gate frame 20 includes four support rods 22. The support rods 22 extend vertically and are located at the four corners of the connection port 11. A crossbar is provided between two adjacent support rods 22 for support. The four support rods 22 are arranged in pairs, forming two groups. The two groups of support rods 22 are arranged parallel to each other along the extension direction of the culvert 100. Each support rod 22 has an installation end face 201 and the aforementioned limiting channel 202 is provided on the support rod 22. The limiting channel 202 extends vertically through the gate frame 20 and extends within the installation end face 201. The sealing gate 30 passes through the limiting channel 202 and is sandwiched between two support rods 22 in the same group. The four support rods 22 and the sealing gate 30 form a receiving cavity.

[0054] Alternatively, the limiting channel 202 can cover both sides of the blocking gate 30, or the blocking gate 30 can be provided with limiting protrusions on both sides, with the limiting protrusions passing through the limiting channel 202. As long as it can guide and limit the blocking gate 30, it is acceptable.

[0055] Furthermore, in this embodiment, a cuboid support rod 22 is selected. Its flat cross-section facilitates contact with the inner wall of the connection port 11 or the sealing well 10, improving stability. The cuboid shape also facilitates manufacturing, processing, installation, and disassembly. Multiple reinforcing rods 23 are provided between adjacent support rods 22, thereby increasing the strength and lifespan of the support rods 22. Simultaneously, the adjacent reinforcing rods 23 are arranged in a triangular pattern, enhancing their stability and preventing displacement or deformation under load.

[0056] See Figure 7 and Figure 8 Regarding the sealing gate 30, the sealing gate 30 is plate-shaped. The side of the sealing gate 30 closest to the receiving cavity along the extension direction of the culvert 100 is the inner end face, and the side of the sealing gate 30 away from the receiving cavity is the outer end face. The outer end face is flush with the mounting end face 201, thereby ensuring good sealing between the sealing gate 30 and the culvert 100, effectively preventing water seepage and improving the sealing performance of the sealing assembly.

[0057] Furthermore, in order to improve the strength of the sealing gate 30, multiple sets of reinforcing ribs 31 are provided on the sealing gate 30. The multiple sets of reinforcing ribs 31 are arranged alternately in the horizontal and vertical directions, so that the sealing gate 30 is not easily damaged when subjected to water flow impact and has a long service life.

[0058] It is worth noting that, in order to improve sealing and prevent water leakage from the top of the sealing gate 30, the height of the sealing gate 30 is higher than the height of the culvert 100. See also... Figure 4 and Figure 5Specifically, the top of the sealing gate 30 extends beyond the top of the culvert 100 and through the connection port 11 into the sealing well 10. Therefore, to improve the stability of the sealing gate 30, the sealing assembly also includes a sealing plate 60. The sealing gate 30 is provided with a mounting flange 32 located within the sealing well 10. The sealing plate 60 is connected to the mounting flange 32 and abuts against the top of the culvert 100. Specifically, the mounting flange 32 is located on the outer end face of the sealing gate 30 within the sealing well 10. The sealing plate 60 is bolted to the mounting flange 32, and the bottom of the sealing plate 60 abuts against the top of the culvert 100. This seals the gap between the gate frame 20 and the connection port 11, preventing water leakage and improving the sealing performance of the sealing gate 30.

[0059] Regarding the selection of the closing plate 60, steel plate is generally sufficient. In this embodiment, U-shaped steel is selected as the closing plate 60. Compared with steel plate, U-shaped steel is less prone to deformation and less likely to displace under load, thus exhibiting higher stability.

[0060] In addition, a rubber layer is provided on the surface where the sealing plate 60 abuts against the culvert 100, which can both reduce vibration and buffer to improve the service life of the sealing plate 60, and improve the sealing performance to prevent water seepage.

[0061] Because the size of the connection port 11 is smaller than the size of the sealing well 10, the sealing gate 30 cannot completely fit against the inner wall of the culvert 100 in the width direction, resulting in a gap between the sealing gate 30 and the inner wall of the culvert 100. Therefore, to prevent excessive water from seeping through the gap, a set of sealing components 40 is provided for each sealing gate 30. The sealing component 40 includes two spaced-apart sealing plates 42, which are slidably connected to the gate frame 20. The two sealing plates 42 can extend to both sides of the sealing gate 30 to seal the gap between the sealing gate 30 and the inner wall of the culvert 100.

[0062] After the sealing gate 30 is installed on the gate frame 20, the sealing component 40 is installed on the gate frame 20. The construction personnel control the sealing plate 42 to slide and extend to both sides. After the sealing plate 42 abuts against the inner wall of the culvert 100, the sliding of the sealing plate 42 is stopped, thereby sealing the gap between the sealing gate 30 and the inner wall of the culvert 100.

[0063] After the sealing components are installed, a reinforcing cage is installed inside the accommodating cavity, and concrete is poured into the reinforcing cage. The reinforcing cage effectively enhances the tensile strength of the concrete, making it more durable and able to withstand greater loads, helping to prevent concrete cracking and damage.

[0064] See Figure 9Specifically, the sealing assembly 40 also includes a telescopic rod 41, which is disposed between and connected to the two sealing plates 42. The telescopic rod 41 is configured to drive the sealing plates 42 to slide. In this embodiment, the telescopic rod 41 is a hydraulic rod connected via a hydraulic pipe. During installation, the construction personnel drive the hydraulic rod to extend to both sides via the hydraulic pipe on the ground, thereby causing the sealing plates 42 to slide and seal the gap between the gate 30 and the inner wall of the culvert 100. In other embodiments, the extension and retraction of the telescopic rod 41 can also be controlled by a cylinder or a lead screw nut.

[0065] To improve the stability of the sealing plate 42, each sealing assembly 40 includes three telescopic rods 41, which are spaced apart along the height of the sealing gate 30, so that the sealing plate 42 is subjected to uniform force.

[0066] In addition, a rubber layer is provided on the surface where the sealing plate 42 abuts against the culvert 100, which can both reduce vibration and buffer to improve the service life of the sealing plate 42, and improve the sealing performance to prevent water seepage.

[0067] The underwater culvert sealing device provided by the present invention first sets up a template for the sealing well 10 on the top of the culvert 100 during installation. After the template is set up, concrete is poured into the template. After the concrete cools and solidifies, the template is removed to complete the pouring of the sealing well 10.

[0068] Afterwards, construction workers entered the sealing well 10 and used gas cutting to cut the top of the culvert 100 to the required dimensions, forming a connection port 11 that connects the sealing well 10 and the culvert. The cut portion was then lifted out of the sealing well 10. Next, the gate frame 20 was lowered from the sealing well 10 into the culvert 100 through the connection port 11, ensuring that the bottom of the gate frame 20 abutted against the inner bottom wall of the culvert 100. Part of the gate frame 20 was located inside the culvert 100, part inside the sealing well 10, and part inside the connection port 11. The bearing plate 212 on the gate frame 20 was then bolted to the inner wall of the sealing well 10.

[0069] To further improve the stability of the gate frame 20, after the load-bearing plate 212 is connected, the construction workers dive into the culvert 100 and weld the limiting plate 50 to the gate frame 20, so that one end of the limiting plate 50 is connected to the gate frame 20.

[0070] After the gate frame 20 is installed, the blocking gate 30 is inserted into the limiting channel 202 opened on the gate frame 20. Under its own weight, the blocking gate 30 slides down the limiting channel 202 to the bottom of the gate frame 20. The two blocking gates 30 are installed on opposite sides of the gate frame 20.

[0071] After the sealing gate 30 is assembled to the gate frame 20, the construction personnel enter the sealing well 10 and bolt the sealing plate 60 to the mounting flange 32. The bottom of the sealing plate 60 abuts against the top of the culvert 100.

[0072] After securing the sealing gate 30, construction workers enter the culvert 100 and install the sealing component 40 onto the gate frame 20. Once the sealing component 40 is installed, workers control the sliding of the sealing plate 42 from the ground or underground to seal the gap between the sealing gate 30 and the inner wall of the culvert 100. Understandably, in actual construction, to improve installation efficiency and protect worker safety, in some cases, the sealing component 40 can be installed onto the gate frame 20 before lowering it, allowing both the gate frame 20 and the sealing component 40 to be lowered into the culvert simultaneously, thus improving installation efficiency.

[0073] Before pouring concrete, the construction workers first installed a steel cage inside the cavity, and then poured concrete into the steel cage to completely seal the culvert 100.

[0074] The above embodiments merely illustrate the basic principles and characteristics of the present invention. The present invention is not limited to the above embodiments. Various changes and modifications can be made to the present invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. An underwater culvert sealing device, characterized in that, include: A sealing well (10) is set at the top of the culvert (100), and a connection port (11) is opened at the bottom of the sealing well (10), which connects the sealing well (10) and the culvert (100). The sealing assembly includes a gate frame (20) and two sealing gates (30). The gate frame (20) extends from the sealing well (10) through the connection port (11) into the culvert (100). The two sealing gates (30) are detachably connected to opposite sides of the gate frame (20). Both the sealing gates (30) and the gate frame (20) extend radially along the culvert (100). The sealing gates (30) are capable of sealing the cross-section of the culvert (100). The sealing gates (30) and the gate frame (20) together enclose a cavity for filling with concrete. The gate frame (20) has two mounting end faces (201), which are arranged parallel to each other along the extension direction of the culvert (100). The mounting end faces (201) abut against the inner wall of the connection port (11), and the blocking gate (30) is disposed on the mounting end face (201). A limiting channel (202) is provided on the gate frame (20), the limiting channel (202) penetrates the gate frame (20) in the vertical direction, the limiting channel (202) extends in the mounting end face (201), and the blocking gate (30) passes through the limiting channel (202); The gate frame (20) is provided with a bearing member (21) on its outer periphery, and the bearing member (21) is connected to the inner wall of the sealing well (10); The support member (21) includes a support rod (211) and a support plate (212). One end of the support rod (211) is connected to the gate frame (20) located in the sealing well (10), and the other end of the support rod (211) is connected to the support plate (212). The support plate (212) is also bolted to the inner wall of the sealing well (10). Multiple support members (21) are provided, and the multiple support members (21) are arranged in pairs, and the multiple sets of support members (21) are distributed on both sides of the gate frame (20).

2. The underwater culvert sealing device according to claim 1, characterized in that, The sealing gate (30) is plate-shaped. The side of the sealing gate (30) closest to the accommodating cavity along the extension direction of the culvert (100) is the inner end face, and the side of the sealing gate (30) away from the accommodating cavity is the outer end face. The outer end face is flush with the mounting end face (201).

3. The underwater culvert sealing device according to claim 1, characterized in that, The sealing assembly also includes a limiting plate (50), which is connected to the gate frame (20) and is sandwiched between the gate frame (20) and the inner wall of the sealing well (10).

4. The underwater culvert sealing device according to claim 1, characterized in that, The sealing assembly also includes a positioning plate (60), and the sealing gate (30) is provided with an installation flange (32). The installation flange (32) is located inside the sealing well (10). The positioning plate (60) is connected to the installation flange (32), and the positioning plate (60) abuts against the top of the culvert (100).

5. The underwater culvert sealing device according to any one of claims 1-4, characterized in that, Also includes: A sealing assembly (40) is provided for each of the sealing gates (30). The sealing assembly (40) includes two sealing plates (42) spaced apart. The sealing plates (42) are slidably connected to the gate frame (20). The two sealing plates (42) can extend to both sides of the sealing gate (30) to seal the gap between the sealing gate (30) and the inner wall of the culvert (100).

6. The underwater culvert sealing device according to claim 5, characterized in that, The sealing assembly (40) further includes a telescopic rod (41), which is disposed between the two sealing plates (42) and connected to the sealing plates (42), and the telescopic rod (41) is configured to drive the sealing plates (42) to slide.

7. The underwater culvert sealing device according to claim 6, characterized in that, Each sealing assembly (40) includes three telescopic rods (41) spaced apart along the height of the sealing gate (30).

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