A drainage hole plugging device for a drainage tunnel of a hydropower station

Abstract

A kind of water power station drainage hole plugging device of drainage hole, including drain pipe, the drain pipe is equipped with open-close type water retaining structure and control valve.Prior art is solved, traditional UPVC plug is broken, and the problem that disassembly is difficult caused by jamming is solved, only need to retract expansion arm when disassembling, and the whole device can be taken out, it is convenient to clean and dredge drainage hole, significantly reduce maintenance difficulty;When unfolding, the cooperation of positioning screw and different adjusting holes can realize opening degree adjustment, can adapt to drainage hole of different aperture, at the same time, extension arm on expansion arm can be flexibly disassembled through mounting groove, and adopt elastic metal material, can adapt to the slight deformation or uneven of hole wall, improve the adaptability of device to complex working conditions;Traditional device can only be plugged, and the problem that cannot be adjusted is solved, can accurately control drainage according to bedrock water seepage, guarantee dam foundation pressure stability.

Description

Technical Field

[0001] This utility model relates to the technical field of dam drainage systems, and in particular to a device for sealing drainage holes in hydropower station drainage tunnels. Background Technology

[0002] The drainage curtain is a core component of the dam's bedrock drainage system. By arranging several boreholes along the same line to form a drainage structure, it effectively drains seepage water from the bedrock, reducing water pressure in the dam foundation and playing a crucial role in ensuring the stability of the concrete dam and the bedrock on both banks. For concrete dams, bedrock drainage on both banks is often achieved by setting drainage tunnels at different elevations and drilling drainage holes within these tunnels to form a drainage curtain. Therefore, the unobstructed flow of drainage holes within these tunnels directly affects the safe operation of the dam.

[0003] In existing technologies, sealing devices for drainage holes in drainage tunnels mostly use circular UPVC plugs as the core structure. Rubber material is used to fill the gap between the plug and the drainage hole wall to achieve the sealing function. However, this type of device has many drawbacks in long-term use: the UPVC plug is brittle and easily breaks under long-term water flow impact and bedrock stress, with the broken parts remaining inside the drainage hole and difficult to remove; simultaneously, the plug is tightly bonded to the drainage hole wall with rubber, which can easily become stuck due to corrosion and siltation, making the sealing device impossible to disassemble and severely hindering the cleaning and dredging of the drainage hole; existing plugs are designed with fixed sizes and cannot adapt to drainage holes of different diameters. For drainage holes with slight diameter deviations or those that have widened due to wear over time, effective sealing is difficult, leading to seepage; it only achieves the sealing function and lacks drainage regulation capabilities, failing to flexibly control the drainage volume according to changes in bedrock seepage, and thus failing to meet drainage needs under different working conditions. Summary of the Invention

[0004] The technical problem this utility model aims to solve is to provide a drainage hole sealing device for hydropower station drainage tunnels. It overcomes the disassembly and assembly difficulties caused by the easy breakage and jamming of traditional UPVC plugs. Disassembly only requires retracting the extension arm to remove the entire device, facilitating cleaning and unblocking of the drainage hole and significantly reducing maintenance difficulty. When extended, the opening can be adjusted through the cooperation of the positioning screw and different adjustment holes, adapting to drainage holes of different diameters. Simultaneously, the extension arm on the extension arm can be flexibly installed and removed through the mounting slot and is made of elastic metal, adapting to minor deformations or unevenness of the hole wall, improving the device's adaptability to complex working conditions. It also solves the problem of traditional devices only being able to seal and not adjust, enabling precise control of drainage based on changes in bedrock seepage, ensuring stable dam foundation pressure.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a drainage hole sealing device for a hydropower station drainage tunnel, including a drainage pipe, wherein the drainage pipe is provided with an openable and closable water-blocking structure and a control valve; The opening and closing water-blocking structure includes a fixed ring fixedly installed on the outer wall of the drain pipe and an adjusting ring that slides with the outer wall of the drain pipe. The fixed ring is provided with multiple sets of first connecting seats, which are hinged to one end of the extension arm. The extension arm is provided with a second connecting seat, which is hinged to one end of the support arm. The other end of the support arm is hinged to a third connecting seat provided on the adjusting ring. The extension arm is provided with a water-blocking cover. The outer wall of the drain pipe is provided with multiple sets of adjusting holes. The adjusting ring is provided with a positioning screw that is threadedly engaged with it, and the positioning screw is positioned and engaged with the adjusting hole.

[0006] In a preferred embodiment, the inner ring of the water-blocking cover that contacts the drain pipe is provided with a closed section that fits against the outer wall of the drain pipe.

[0007] In a preferred embodiment, the drain pipe is provided with a sealing ring, and the sealing ring has a sealing groove that cooperates with the water baffle.

[0008] In a preferred embodiment, the extension arm is provided with a mounting groove, and an extension arm that is detachably fitted into the mounting groove is provided with the extension arm. The extension arm is fixedly installed to the extension arm by a mounting component.

[0009] In a preferred embodiment, the end of the extension arm away from the expansion arm has a pointed structure.

[0010] In a preferred embodiment, the extension arm is made of a flexible metal material. In a preferred embodiment, the extended arm is provided with a reinforcement component that connects to the water-blocking cover.

[0011] In a preferred embodiment, the number of the multiple sets of first connecting seats is no less than eight.

[0012] In a preferred embodiment, the water-blocking cover is circular and adapted to the inner diameter of the pipe hole.

[0013] In a preferred embodiment, the water-blocking cover and the extension arm are assembled and disassembled through a reinforcement fitting, and the water-blocking cover and the drain pipe are assembled and disassembled through a sealing ring.

[0014] The drainage hole sealing device for a hydropower station drainage tunnel provided by this utility model has the following beneficial effects by adopting the above-mentioned structure: (1) It solves the problem of disassembly and assembly caused by the easy breakage and jamming of traditional UPVC plugs. When disassembling, the device can be taken out as a whole by simply retracting the extension arm, which makes it easy to clean and unclog the drainage hole and significantly reduces the difficulty of maintenance. (2) When unfolded, the opening can be adjusted by the positioning screw and different adjustment holes, which can adapt to drainage holes of different diameters. At the same time, the extension arm on the extension arm can be flexibly disassembled and assembled through the mounting slot, and is made of elastic metal material, which can adapt to the slight deformation or unevenness of the hole wall, and improve the adaptability of the device to complex working conditions. (3) It solves the problem that traditional devices can only block and cannot adjust, and can accurately control drainage according to the changes in bedrock seepage, ensuring the stability of dam foundation pressure. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments: Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0016] Figure 2 This is a schematic diagram of the overall structure of this utility model.

[0017] Figure 3 This is a schematic diagram of the overall structure of this utility model.

[0018] Figure 4 This is a schematic diagram of the skeleton extension state of this utility model.

[0019] Figure 5 This is a schematic diagram of the skeleton of this utility model in its retracted state.

[0020] In the diagram: 1. Drain pipe; 2. Water baffle; 3. Sealing ring; 4. Control valve; 5. Sealing groove; 6. Fixing ring; 7. Adjusting ring; 8. First connecting seat; 9. Extension arm; 10. Mounting groove; 11. Extension arm; 12. Mounting piece; 13. Reinforcing piece; 14. Second connecting seat; 15. Support arm; 16. Third connecting seat; 17. Adjusting hole; 18. Positioning screw. Detailed Implementation

[0021] Example 1: like Figures 1-5 In the present invention, a drainage hole sealing device for a hydropower station drainage tunnel includes a drainage pipe 1. The drainage pipe 1 is made of UPVC material and serves as both a drainage channel and a structural frame. The drainage pipe 1 is equipped with an openable water-blocking structure and a control valve 4. The control valve 4 is used to regulate the seepage flow rate of bedrock. The opening and closing water-blocking structure includes a fixing ring 6 fixedly installed on the outer wall of the drain pipe 1 and an adjusting ring 7 slidably engaged with the outer wall of the drain pipe 1. The fixing ring 6 corresponds to the upper cavity of the umbrella-type sealing structure, and the adjusting ring 7 corresponds to the lower cavity of the umbrella-type sealing structure. The fixing ring 6 is provided with multiple sets of first connecting seats 8, which are hinged to one end of the extension arm 9. The extension arm 9 corresponds to the blade frame. The extension arm 9 is provided with a second connecting seat 14, which is hinged to one end of the support arm 15. The support arm 15 corresponds to the support frame, and the other end of the support arm 15 is hinged to a third connecting seat 16 provided on the adjusting ring 7. Water blocking is achieved through the linkage between the support arm 15 and the extension arm 9. The structure can be extended and retracted. The extension arm 9 is equipped with a water-blocking cover 2 made of rubber. Multiple water-blocking covers are evenly distributed around the drain pipe 1, with the edges of adjacent covers overlapping to seal the gaps in the hole wall. The outer wall of the drain pipe 1 has multiple adjustment holes 17. The adjustment ring 7 has a positioning screw 18 that engages with its thread, and the positioning screw 18 is positioned and engaged with the adjustment hole 17. During installation, sliding the adjustment ring 7 causes the support arm 15 to push the extension arm 9 to unfold, allowing the water-blocking cover 2 to fit against the drain hole wall. The positioning screw 18 is then screwed into the corresponding adjustment hole 17 for fixation. During disassembly, loosening the positioning screw 18 and sliding the adjustment ring 7 in the opposite direction retracts the extension arm 9, allowing the device to be removed.

[0022] like Figure 3 In the preferred embodiment, the inner ring of the water-blocking cover 2 that contacts the drain pipe 1 is provided with a closed section that fits against the outer wall of the drain pipe 1. The closed section is made of wear-resistant rubber material to enhance the fit and sealing with the drain pipe 1.

[0023] like Figure 3 In the preferred embodiment, the drain pipe 1 is provided with a sealing ring 3, which is made of elastic rubber. The sealing ring 3 has a sealing groove 5 that cooperates with the water baffle 2. The edge of the water baffle 2 is embedded in the sealing groove 5 to form a double seal, further reducing water seepage.

[0024] like Figure 4 In a preferred embodiment, the extension arm 9 is provided with a mounting groove 10, and an extension arm 11 that is detachably mounted and disassembled is provided in the mounting groove 10. The extension arm 11 is fixedly mounted to the extension arm 9 by a mounting component 12 (such as a bolt), which facilitates the replacement of extension arms 11 of different lengths according to the diameter of the drainage hole.

[0025] like Figure 4 In a preferred embodiment, the end of the extension arm 11 away from the extension arm 9 is provided with a pointed structure, which can be inserted into the silt in the drainage hole to help clear the blockage in the hole.

[0026] like Figures 3-5In the preferred embodiment, the extension arm 11 is made of an elastic metal material (such as spring steel) to adapt to minor unevenness of the drainage hole wall, ensuring that the water-blocking cover 2 fits tightly against the hole wall.

[0027] like Figures 3-5 In the preferred embodiment, the extended arm 9 is provided with a reinforcement 13 that connects to the water shield 2. The reinforcement 13 is a metal buckle, which enhances the connection strength between the water shield 2 and the extended arm 9 and prevents the water shield 2 from falling off due to water flow impact.

[0028] like Figures 3-5 In the preferred embodiment, the number of the multiple sets of first connecting seats 8 is no less than eight, and they are evenly distributed around the circumference of the fixing ring 6 so that the force is even when the extension arm 9 is unfolded, avoiding excessive local stress that could lead to structural damage.

[0029] like Figures 1-3 In the preferred embodiment, the water-blocking cover 2 is a circle that adapts to the inner diameter of the pipe hole, and its diameter can be adjusted according to the degree of expansion of the extension arm 9 to adapt to drainage holes of different diameters.

[0030] like Figures 2-4 In the preferred embodiment, the water baffle 2 and the extension arm 9 are assembled and disassembled through the reinforcement 13, and the water baffle 2 and the drain pipe 1 are assembled and disassembled through the sealing ring 3, which facilitates the individual replacement of the aged or damaged water baffle 2 and sealing ring 3, reducing maintenance costs.

[0031] Example 2: like Figures 1-5 The working principle of this utility model is as follows: Installation and sealing principles The device uses a UPVC drainage pipe 1 as its core framework, also functioning as a drainage channel. It achieves a seal by adjusting the opening and closing water-blocking structure to fit the drainage hole. During installation, the device is placed inside the drainage hole, and the sliding adjustment ring 7 (corresponding to the lower nest of the umbrella structure) causes the support arm 15 to push the extension arm 9 (corresponding to the blade frame) outward. The extension arm 9 simultaneously opens the rubber water-blocking cover 2, utilizing its elasticity to fit against the drainage hole wall. Simultaneously, multiple sets of water-blocking covers 2 are evenly distributed around the circumference of the drainage pipe 1, with overlapping edges. Combined with the tight fit between the inner closed section of the water-blocking cover 2 and the outer wall of the drainage pipe 1, and the fitting of the sealing groove 5 of the sealing ring 3 with the edge of the water-blocking cover 2, a multi-layered sealing structure is formed, effectively sealing the gap between the drainage pipe 1 and the hole wall, preventing water leakage. Finally, the opening of the extension arm 9 is fixed by screwing the positioning screw 18 on the adjustment ring 7 into the corresponding adjustment hole 17 on the outer wall of the drainage pipe 1, ensuring a stable sealing state.

[0032] Drainage regulation principle After seepage water from the bedrock enters the device through the drainage hole, it flows along the UPVC drainage pipe 1 to achieve drainage. The control valve 4 on the drainage pipe 1 can control the water flow speed by adjusting the opening degree, flexibly adapting to different seepage conditions and ensuring the stability of the dam foundation pressure.

[0033] Disassembly and maintenance principles When cleaning, unclogging, or maintaining the drain hole is required, loosen the positioning screw 18 to release the fixing of the adjusting ring 7, slide the adjusting ring 7 in the opposite direction, causing the support arm 15 to pull the extension arm 9 inward, and the rubber water-blocking cover 2 to retract and detach from the hole wall. At this time, the entire device can be removed from the drain hole. In addition, the elastic metal material of the extension arm 11 on the extension arm 9 can adapt to minor unevenness of the hole wall, and its pointed end structure can assist in inserting into the inner wall of the hole. Aging or damaged parts can be replaced individually, reducing maintenance costs.

[0034] The beneficial effects of this utility model are as follows: It solves the disassembly and assembly problems caused by the easy breakage and jamming of traditional UPVC plugs. During disassembly, the entire device can be removed simply by retracting the extension arm, making it easy to clean and unclog the drainage holes and significantly reducing maintenance difficulty. When unfolded, the opening can be adjusted by the cooperation of the positioning screw and different adjustment holes, which can adapt to drainage holes of different diameters. At the same time, the extension arm on the extension arm can be flexibly disassembled and assembled through the mounting slot, and is made of elastic metal material, which can adapt to the slight deformation or unevenness of the hole wall, improving the adaptability of the device to complex working conditions. It solves the problem that traditional devices can only block and cannot adjust, and can accurately control drainage according to the changes in bedrock seepage, ensuring the stability of dam foundation pressure.

Claims

1. A device for sealing the drainage hole of a hydropower station drainage tunnel, comprising a drainage pipe (1), characterized in that: The drain pipe (1) is equipped with an openable water-blocking structure and a control valve (4); The opening and closing water-blocking structure includes a fixed ring (6) fixedly installed on the outer wall of the drain pipe (1) and an adjusting ring (7) that slides with the outer wall of the drain pipe (1). The fixed ring (6) is provided with multiple sets of first connecting seats (8). The first connecting seats (8) are hinged to one end of the extension arm (9). The extension arm (9) is provided with a second connecting seat (14). The second connecting seat (14) is hinged to one end of the support arm (15). The other end of the support arm (15) is hinged to a third connecting seat (16) provided on the adjusting ring (7). The extension arm (9) is provided with a water-blocking cover (2). The outer wall of the drain pipe (1) is provided with multiple sets of adjusting holes (17). The adjusting ring (7) is provided with a positioning screw (18) that is threaded with it. The positioning screw (18) is positioned with the adjusting hole (17).

2. The device for sealing drainage holes in a hydropower station drainage tunnel according to claim 1, characterized in that: The inner ring of the water shield (2) that contacts the drain pipe (1) is provided with a closed section that fits against the outer wall of the drain pipe (1).

3. The device for sealing drainage holes in a hydropower station drainage tunnel according to claim 1, characterized in that: The drain pipe (1) is provided with a sealing ring (3), and the sealing ring (3) is provided with a sealing groove (5) that cooperates with the water baffle (2).

4. The device for sealing drainage holes in a hydropower station drainage tunnel according to claim 1, characterized in that: The extension arm (9) is provided with a mounting groove (10), and an extension arm (11) is provided in the mounting groove (10) for disassembly and assembly. The extension arm (11) is fixedly installed with the extension arm (9) through a mounting component (12).

5. A device for sealing drainage holes in a hydropower station drainage tunnel according to claim 4, characterized in that: The extension arm (11) has a pointed structure at the end away from the extension arm (9).

6. A device for sealing drainage holes in a hydropower station drainage tunnel according to claim 4, characterized in that: The extension arm (11) is made of elastic metal.

7. A device for sealing drainage holes in a hydropower station drainage tunnel according to claim 1, characterized in that: The extended arm (9) is provided with a reinforcement (13) that is connected to the water shield (2).

8. A device for sealing drainage holes in a hydropower station drainage tunnel according to claim 1, characterized in that: The number of the multiple sets of first connecting seats (8) is not less than eight.

9. A device for sealing drainage holes in a hydropower station drainage tunnel according to claim 1, characterized in that: The water shield (2) is circular and adapted to the inner diameter of the pipe hole.

10. A device for sealing drainage holes in a hydropower station drainage tunnel according to claim 1, characterized in that: The water shield (2) and the extension arm (9) are assembled and disassembled through the reinforcement (13), and the water shield (2) and the drain pipe (1) are assembled and disassembled through the sealing ring (3).

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