Unpowered emergency drainage device for flooded factory building of hydraulic power plant

Abstract

The invention discloses an unpowered emergency drainage device for a flooded plant of a hydraulic power plant. The unpowered emergency drainage device comprises a buoyancy assembly, a transmission assembly, a drainage channel and a drainage channel thrust butterfly valve. The buoyancy assembly at least comprises a driving block, and the drainage channel thrust butterfly valve is installed in the drainage channel. The transmission assembly comprises a fixed transmission seat, a telescopic power rod and a transmission rod, and the fixed transmission seat is fixedly mounted; the telescopic power rod is rotationally mounted on the fixed transmission seat, one end of the telescopic power rod is rotationally connected with the driving block, and the other end is a transmission part; the transmission rod is slidably mounted on the fixed transmission seat, one end of the transmission rod is in contact with the transmission portion, and the other end of the transmission rod is in contact with the drainage channel thrust butterfly valve. Buoyancy or gravity is ingeniously used as a driving source, so that the driving block can automatically ascend or descend along with the change of the water level, the opening and closing of the corresponding valve are driven through the ascending or descending action of the driving block, the opening and closing of the drainage channel are effectively controlled, and the device can automatically operate under the conditions of power failure and circuit failure.

Description

Technical Field

[0001] The invention relates to the technical field of water drainage in hydropower plants, in particular to an unpowered emergency water drainage device for flooded workshops in hydropower plants. Background Art

[0002] As an important energy conversion facility, hydropower stations are usually located in steep mountain valleys, which are prone to natural disasters such as rainstorms, mountain torrents, and mudslides in summer. For underground hydropower plants, since they are usually arranged at a low height, they are very likely to be flooded when facing the above natural disasters. Such accidents are sudden and highly harmful, which may not only cause heavy casualties and property losses, but also pose a serious threat to the long-term safe and stable operation of hydropower stations.

[0003] When dealing with flooded plant accidents, the first priority is to ensure the safety of personnel and important equipment. However, due to the suddenness of the accident, traditional emergency measures that rely on power supply often have the risk of failure and power outage, which increases the uncertainty of equipment and personnel safety.

[0004] At present, the drainage measures applied to hydropower plants mainly include water collection well drainage and corridor drainage. However, both of these conventional drainage methods rely on drainage pumps for drainage. Under the condition of flooded plants, due to insufficient pump power, they are often unable to complete the task of draining large amounts of accumulated water. In addition, flooded plants may also cause power supply system failures or power outages. At this time, maintenance personnel need to deal with power failures in a short time to ensure the normal operation of the drainage system.

[0005] In order to solve the problem of water accumulation under flooded plant conditions, industry insiders have proposed some solutions. For example, the automatic detection system is used to automatically trigger the alarm or drainage device switch through buoyancy blocks; pit structures are arranged in the key equipment area of ​​the plant to collect the accumulated water, and the accumulated water is discharged through drainage pumps; automatic graded drainage pumps are used to combine the drainage pumps with the automatic detection system to start water pumps of different powers according to the different water levels detected; and tailwater pipe drainage pumps are added to address the problem of tailwater or high-pressure water infiltration in underground plants.

[0006] However, although these solutions have improved the ability to respond to flooding accidents to a certain extent, they still rely on the power supply system. Under the conditions of emergency power outage or circuit failure, the drainage and alarm systems will not work properly, which increases the uncertainty and risk of accident handling. Therefore, it is particularly important to develop a drainage and alarm system that can still work normally under the conditions of no power supply or power failure. Summary of the invention

[0007] Therefore, in order to solve the above-mentioned deficiencies, the present invention provides a non-powered emergency drainage device for flooded plant buildings in a hydropower plant. The device cleverly utilizes buoyancy or gravity as a driving source, so that the driving block can automatically rise or fall with the change of water level, and then drive the opening and closing of the corresponding valve through its rising or falling action, thereby effectively controlling the opening and closing of the drainage channel. The device can automatically operate under conditions of power outages and circuit failures.

[0008] Specifically, an unpowered emergency drainage device for a flooded plant in a hydropower plant includes a buoyancy component, a transmission component, a drainage channel, and a drainage channel thrust butterfly valve; The buoyancy assembly comprises at least one driving block installed in the hydropower plant, the buoyancy of the driving block in the water being greater than the gravity; The drainage channel thrust butterfly valve is installed in the drainage channel; The transmission assembly comprises a fixed transmission seat, a telescopic power rod and a transmission rod, wherein the fixed transmission seat is fixedly mounted on a base surface (such as a wall); The telescopic power rod is rotatably mounted on the fixed transmission seat, one end of the telescopic power rod is rotatably connected to the driving block, and the other end is a barbed transmission part; The transmission rod is slidably mounted on the fixed transmission seat, one end of the transmission rod is in contact with the transmission part through an arc-shaped groove, and the other end is in contact with the thrust butterfly valve of the drainage channel; When the driving block moves upward or downward under the action force, it drives the telescopic power rod to rotate, and the rotating transmission part drives the transmission rod to move, and the movement of the transmission rod controls the opening and closing of the thrust butterfly valve of the drainage channel. The action force is the buoyancy of the driving block or its own gravity.

[0009] Optionally, the unpowered emergency drainage device for the flooded plant of the hydropower plant further includes a water storage tank connected to the drainage channel, the water storage tank is provided with an exhaust channel, and an exhaust valve is installed on the exhaust channel; An exhaust port telescopic power rod adapted to the exhaust valve is rotatably connected to the transmission rod; When the driving block moves upward or downward under the action force, it drives the telescopic power rod to rotate, and the rotating transmission part drives the transmission rod to move, and the movement of the transmission rod drives the exhaust port telescopic power rod to move, and the movement of the exhaust port telescopic power rod is used to control the opening and closing of the exhaust valve.

[0010] Optionally, the driving block is a hollow buoy, which is rotatably connected to the telescopic power rod; The buoyancy assembly also includes a buoy base, a guide member, a height adjustment tube and an upper limit member. The guide member is fixedly mounted on the buoy base, the buoy has a long hole in the vertical direction, the guide member passes through the long hole, the height adjustment tube is mounted on the guide member and is located below the buoy, and the upper limit member is fixedly mounted on the upper part of the buoy.

[0011] Optionally, the buoyancy assembly further includes a floating plate bracket, the driving block is a floating plate, and one side of the floating plate is rotatably connected to the telescopic power rod; The floating plate bracket is installed on the wall of the hydropower plant, and the floating plate is embedded in the middle area of ​​the floating plate bracket. The floating plate can move up and down along the sliding grooves on both sides of the floating plate bracket.

[0012] Optionally, the buoyancy assembly further comprises a buoy base, on which a rectangular mounting bracket is mounted, and the rectangular mounting bracket has a guide rail; The driving block is a floating block with an oblong hole, the guide rail passes through the oblong hole, and the floating block is rotatably connected to the telescopic power rod; An upper limit member is installed on the upper part of the rectangular mounting bracket.

[0013] Optionally, a drainage channel cover plate and a drainage channel protection net are installed in sequence above the water inlet of the drainage channel.

[0014] Optionally, a sliding platform is installed above the drainage channel protection net through a protection net sliding track.

[0015] Optionally, the water tank is provided with a drain pipe, on which a drain valve is installed; and a support is installed inside the water tank.

[0016] Optionally, the drainage channel thrust butterfly valve and the exhaust valve have the same structure, both comprising a butterfly valve body, a butterfly valve plate and a butterfly valve stem, the butterfly valve plate is mounted on the butterfly valve body through the butterfly valve stem, and a spring is mounted on the butterfly valve stem to enable the butterfly valve plate to have a reset function; The telescopic power rod is in contact with the butterfly valve plate, and an arc-shaped sliding groove in contact with the telescopic power rod is provided on the butterfly valve plate.

[0017] Optionally, the exhaust valve includes an exhaust valve plate and a support seat, the exhaust valve plate is mounted on the support seat via a spring, and the support seat is connected to the inner wall of the exhaust channel; the exhaust port telescopic power rod is in contact with the exhaust valve plate.

[0018] The present invention has the following advantages: The non-powered emergency drainage device for flooded powerhouses of a hydropower plant of the present invention does not require external power supply, can operate automatically, and has high safety and reliability. When the powerhouse is flooded, even under the condition of power failure or circuit failure, the device can still maintain the drainage function for a period of time, which buys precious time for the transfer of personnel and important equipment and effectively reduces the damage that may be caused by the accident.

[0019] At the same time, the components of the present invention take into account the environmental characteristics of the hydropower plant, ensuring that the installation of the device does not affect the normal operation of the hydropower plant. Its structure is safe and reliable, and the driving part moves in a restricted area, which not only ensures safety, but also provides sufficient buoyancy to effectively drive the transmission parts to move, thereby realizing the opening and closing of the valve. This design not only improves the practicality of the device, but also ensures its stable operation in complex environments.

[0020] At the same time, the ingeniously designed protective net near the drain outlet of the present invention provides convenience for the transfer of personnel and equipment under drainage conditions. The protective net can effectively prevent personnel and equipment from being sucked into the drain outlet, avoiding potential safety accidents. If close to the drainage area, personnel can move by grasping the drainage channel protective net, thereby reducing the difficulty of safe transfer of personnel and equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic diagram of the connection between the transmission assembly of the present invention, the driving member and the drainage channel; Figure 2 This is a partial connection diagram of the transmission assembly of the present invention. Figure 3 It is a schematic diagram of the non-powered emergency drainage device of the present invention using a buoy and an additional water storage tank; Figure 4 It is a schematic diagram of the structure when the driving member is a floating plate; Figure 5 This is a schematic diagram of the structure when the driving element is a floating block. Figure 6 is a schematic diagram of contact between the transmission rod and the thrust butterfly valve of the drainage channel; Figure 7 is another structural schematic diagram of the thrust butterfly valve of the drainage channel; Figure 8 It is a schematic diagram of the exhaust valve using a plug structure; Fig. 9 It is a structural schematic diagram of adding a sliding platform to the drainage channel protection net; In the figure: 1. buoyancy assembly; 10. drive block; 11. buoy; 12. buoy guide rail; 13. buoy base; 14. buoy upper limit platform; 15. height adjustment tube; 16. floating plate; 17. floating plate bracket; 18. floating block; 19. rectangular mounting bracket; 2. transmission assembly; 21. telescopic power rod; 211. transmission part; 22. fixed transmission seat; 23. transmission rod; 231. arc groove; 24. exhaust port telescopic power rod; 3. exhaust Water channel thrust butterfly valve; 31. Butterfly valve plate; 32. Butterfly valve body; 33. Butterfly valve stem; 34. Metal door plate; 35. Door plate support seat; 4. Exhaust valve; 44. Movable plug; 45. Cylindrical guide tube; 51. Drain channel cover plate; 52. Drain channel protection net; 53. Drain channel; 54. Protection net sliding guide rail; 55. Sliding platform; 6. Water storage tank; 61. Water tank wall; 62. Support member; 63. Drain pipe; 64. Drain valve. DETAILED DESCRIPTION

[0022] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.

[0023] In this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprises", or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or apparatus that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article, or apparatus.

[0024] As described in the background technology, the drainage measures currently used in hydropower plants mainly include water collection well drainage and corridor drainage. However, both of these conventional drainage methods rely on drainage pumps for drainage, and under the condition of flooded plants, due to insufficient pump power, they are often unable to complete the task of draining large amounts of accumulated water. In addition, flooded plants may also cause power supply system failures or power outages, and maintenance personnel need to deal with power failures in a short period of time to ensure the normal operation of the drainage system.

[0025] In order to solve the problem of water accumulation under flooded plant conditions, industry insiders have proposed some solutions. For example, the automatic detection system is used to automatically trigger the alarm or drainage device switch through buoyancy blocks; pit structures are arranged in the key equipment area of ​​the plant to collect the accumulated water, and the accumulated water is discharged through drainage pumps; automatic graded drainage pumps are used to combine the drainage pumps with the automatic detection system to start water pumps of different powers according to the different water levels detected; and tailwater pipe drainage pumps are added to address the problem of tailwater or high-pressure water infiltration in underground plants.

[0026] However, although these solutions have improved the ability to respond to flooding accidents to a certain extent, they still rely on the power supply system. In the event of an emergency power outage or circuit failure, the drainage and alarm systems will not work properly, increasing the uncertainty and risk of accident handling.

[0027] Therefore, based on the above shortcomings, this embodiment provides a non-powered emergency drainage device for flooded plant buildings in a hydropower plant, such as Figure 1 As shown, the device includes a buoyancy assembly 1, a transmission assembly 2, a drainage channel 5 and a drainage channel thrust butterfly valve 3; The buoyancy assembly 1 comprises at least one driving block 10 installed in a hydropower plant, the buoyancy of the driving block in the water being greater than the gravity; The drainage channel thrust butterfly valve 3 is installed in the drainage channel 53; The transmission assembly includes a fixed transmission seat 22, a telescopic power rod 21 and a transmission rod 23, wherein the fixed transmission seat 22 is fixedly installed on a base surface (such as a wall); The telescopic power rod 21 is rotatably mounted on the fixed transmission seat 22. One end of the telescopic power rod 21 is rotatably connected to the driving block, and the transmission part 211 (such as Figure 2 shown); The transmission rod 23 is slidably mounted on the fixed transmission seat 22. One end of the transmission rod is in contact with the transmission part by providing an arc groove 231 (such as Figure 2 As shown), the other end is in contact with the drainage channel thrust butterfly valve 3; When the driving block 10 moves upward or downward under the action force, it drives the telescopic power rod to rotate, and the rotating transmission part drives the transmission rod to move, and the movement of the transmission rod controls the opening and closing of the thrust butterfly valve of the drainage channel. The action force is the buoyancy of the driving block or its own gravity.

[0028] Exemplarily, the telescopic power rod 21 is a hydraulic telescopic rod, the tail of which is a transmission part 211 of a barb-shaped structure, which is fixed to the fixed transmission seat 22 and can rotate; the transmission part 211 at the tail of the telescopic power rod 21 is located in the arc groove 231 of the transmission rod 23, and when it rotates, it will push the transmission rod 23 to move, and the inner surface of the arc groove is made of rubber surface or mechanically polished to increase its surface friction coefficient and improve the transmission effect between the telescopic power rod 21 and the transmission rod 23. The inner surface of the cylinder of the fixed transmission seat 22 is made of low friction coefficient materials such as polytetrafluoroethylene. When the driving member rises or falls due to the action of buoyancy or gravity, the transmission part 211 at the tail of the telescopic power rod 21 rotates on the fixed transmission seat 22, and its hook-shaped transmission part 211 will move clockwise or counterclockwise and push the transmission rod 23 to move left and right; the transmission rod 23 is installed inside the cylinder of the fixed transmission seat 22, and its movement is limited by the cylinder wall, so it can only move left and right along the cylinder direction, thereby controlling the opening and closing of the drainage channel thrust butterfly valve through the left and right movement of the transmission rod.

[0029] Exemplarily, the driving block is a buoy, which is rotatably connected to the telescopic power rod; the buoyancy assembly also includes a buoy base, a guide, a height adjustment tube and an upper limit member; like Figure 3 As shown, the float 11 is a hollow structure made of engineering plastic or metal material, with a certain weight. When it is submerged in water, it will be affected by buoyancy. When the liquid level reaches a certain height, the buoyancy exceeds the gravity, and the float 11 will move upward; there is a vertical long hole in the middle of the float 11, and it is fixed to the float guide rail 12 (i.e., the guide member) through the long hole. The float 11 can move vertically up and down along the guide rail 12; the float 11 and the float guide rail 12 are both installed on the float base 13, and the float guide rail 12 is treated with low friction, for example, the surface is made of polytetrafluoroethylene material and mirror polishing is used; a float upper limit platform 14 (i.e., the upper limit member) is provided on the top of the float guide rail 12, which is used to set the limit position of the movement of the float 11; there is a height adjustment tube 15 on the float base 13, which is used to set the starting position of the movement of the float 11.

[0030] The above-mentioned technical features can realize automatic operation under conditions of power outage and circuit failure. By cleverly utilizing buoyancy or gravity as the driving source, the driving block can automatically rise or fall with the change of water level. The rising or falling action of the driving block can drive the transmission assembly to move, thereby driving the opening and closing of the corresponding valve, effectively controlling the opening and closing of the drainage channel.

[0031] In order to better drain the accumulated water from the factory building when the factory building is flooded, in one embodiment, Figure 3As shown, the unpowered emergency drainage device for the flooded plant of the hydropower plant also includes a water storage tank 6 connected to the drainage channel 53; a drainage channel cover plate 51 and a drainage channel protection net 52 are installed in sequence above the water inlet of the drainage channel.

[0032] In the above technical features, the water inlet of the drainage channel 53 is slightly higher than the floor of the factory building to ensure the cleanliness of the pipeline. In addition to the conventional drainage function, the drainage channel also has the functions of auxiliary handrails and preventing personnel and equipment from being inhaled. The drainage channel cover plate 51 is made of metal material and a perforated structure, and has anti-impact characteristics; the drainage channel protection net 52 is welded with metal pipes and can be used as a handrail for personnel. When the factory building is flooded and drained, the protection net can be used as a handrail for personnel to grasp. The drainage channel protection net 52 can also be added with a slide rail and a slide rope structure to facilitate the safe transfer of personnel and equipment. By adding a support member 62 inside the water storage tank, it has reliable impact and pressure resistance. The water tank wall 61 can be made of a metal structure or a cement casting structure. In addition, a drain pipe 63 and a drain valve 64 are also provided on the water tank wall. After the flooding accident, the accumulated water in the water storage tank can be discharged through the drain pipe 63 and the drain valve 64.

[0033] Due to the flooded factory building, the drainage flow is very large, and the one-way large flow drainage is easy to cause the pipeline steam blockage, that is, the air in the water storage tank cannot be discharged smoothly, thus reducing the drainage flow rate and the working performance of the entire drainage device. Therefore, an exhaust channel is opened in the water storage tank, and an exhaust valve 4 is installed on the exhaust channel; An exhaust port telescopic power rod 24 adapted to the exhaust valve is rotatably connected to the transmission rod 23, and the exhaust port telescopic power rod is a hydraulic telescopic rod; When the driving block moves upward or downward under the action force, it drives the telescopic power rod to rotate, and the rotating transmission part drives the transmission rod to move, and the movement of the transmission rod drives the exhaust port telescopic power rod to move, and the movement of the exhaust port telescopic power rod is used to control the opening and closing of the exhaust valve.

[0034] The above-mentioned technical features can realize the synchronous transmission and opening and closing of the drainage and exhaust channel valves. The drainage valve is opened and closed by the tail of the transmission rod, and the exhaust valve is opened and closed by the exhaust port telescopic power rod. This makes the entire water storage tank connected, realizing the efficient drainage function of the device.

[0035] like Figure 3 As shown, the operating principle of the unpowered emergency drainage device for the flooded plant of the hydropower plant is: When a flooding accident occurs, the liquid level in the factory building rises sharply. When the liquid level rises to the bottom of the float 11, the float 11 is stressed and moves upward, prompting the telescopic power rod 21 to rotate, and the traction transmission rod 23 moves toward the side of the float. The drainage channel butterfly valve plate 31 and the exhaust valve 4 rotate and open at the same time. At this time, the drainage channel and the exhaust channel are both in an open state. When the liquid level in the factory building reaches the height of the upper edge of the drainage pipe 53, the excess water will flow into the water storage tank 6 along the drainage channel 53. After the flooding accident, the float 11 is no longer affected by buoyancy. The gravity of the float 11 will be greater than the sum of its own friction, the thrust of the drainage channel thrust butterfly valve assembly 3, and the friction of the transmission assembly 2. The float 11 descends, the transmission rod 23 moves toward the drainage channel side, the drainage channel butterfly valve plate 31 and the exhaust valve 4 are closed, and the water storage tank 6 is still full of water. After that, the float 11 can be manually lifted to open the butterfly valve plate 31 and the exhaust valve 4 of the drainage channel, and then the drain valve 64 is opened. The accumulated water in the water storage tank 6 can be drained by a drainage pump, etc., and after it reaches a dry state, the float 11 can be lowered, and the entire device is back in standby mode.

[0036] In another embodiment, if Figure 4 As shown, the driving member is a floating plate, and the buoyancy assembly also includes a floating plate bracket, one side of which is rotatably connected to the telescopic power rod. The floating plate 16 can be arranged in the wall, that is, a square space is opened in the wall of the hydropower plant, and the floating plate bracket 17 and the floating plate 16 are installed respectively. The floating plate 16 is embedded in the middle area of ​​the floating plate bracket 17 and can move up and down along the slide grooves on both sides of the floating plate bracket 17. When the floating plate 16 is submerged in water, it moves upward under the action of buoyancy drive, driving the transmission rod 23 to move toward the floating body side, thereby achieving the purpose of opening the valve.

[0037] In another embodiment, if Figure 5 As shown, the driving member is a floating block, and the buoyancy assembly also includes a buoy base, on which a rectangular mounting bracket is installed, and the rectangular mounting bracket has a guide rail. The floating block 18 is arranged inside the rectangular mounting bracket 19, and oblong holes are opened at the four corners of the floating block, which correspond to the four guide rails in the four corner areas of the rectangular mounting bracket 19 one by one, and can move up and down along the guide rails. When the floating block 18 is submerged in water, it moves upward under the action of buoyancy drive, driving the transmission rod 23 to move toward the floating body side, thereby achieving the purpose of opening the valve. An upper limit member is installed on the upper part of the rectangular mounting bracket.

[0038] In one embodiment, the drainage channel thrust butterfly valve 3 and the exhaust valve 4 have the same structure. Figure 6As shown, each comprises a butterfly valve body 32, a butterfly valve plate 31 and a butterfly valve stem 33, wherein the butterfly valve plate 33 is mounted on the butterfly valve body 32 through the butterfly valve stem 33; the telescopic power rod contacts the butterfly valve plate, and an arc-shaped slide groove in contact with the telescopic power rod is provided on the butterfly valve plate. The surface of the slide groove is processed by low friction, such as filling with polytetrafluoroethylene material, mirror polishing, etc. The butterfly valve plate 31 can rotate along the butterfly valve stem 33 arranged at the center, presenting an open or closed state; the butterfly valve stem 33 is provided with a preload spring, and when the valve is not subjected to force, the butterfly valve plate 31 will be in a vertical open state. The butterfly valve plate 31 is connected to the tail of the transmission rod 23. When the tail of the transmission rod 23 moves in the slide groove, it can push or release the butterfly valve plate 31 to change the open or closed state of the butterfly valve plate 31; the butterfly valve plate of the exhaust valve is indirectly connected to the side of the transmission rod 23 through the exhaust port telescopic rod 24.

[0039] In another embodiment, if Figure 7 As shown, the drainage channel thrust butterfly valve 3 can adopt a door plate structure with a limit and surface grooves. In order to reduce the cost of the drainage channel thrust butterfly valve assembly 3, a metal door plate 34 and a door plate support seat 35 can be used to achieve the function of whether the drainage channel is open. A spring and a hinge are installed at one end of the metal door plate 34. When there is no external force, the metal door plate 34 is in a vertically open state; a slide groove is opened on one side of the metal door plate 34 to guide the transmission rod 23 to move in the slide groove to achieve the purpose of opening and closing the valve.

[0040] In another embodiment, if Figure 8 As shown, the exhaust valve 4 adopts a plug structure that moves up and down. In actual use, the exhaust passage does not need to be sealed, so the exhaust valve 4 can be a simple plug structure to reduce costs. Specifically, the movable plug 44 is connected to the exhaust port telescopic rod 24, and the movable plug 44 is arranged inside the cylindrical conduit 45 and can move up and down in the cylindrical conduit 45. A vertical gap is opened on one side of the cylindrical conduit 45 for connecting and moving the exhaust port telescopic rod 24.

[0041] In another embodiment, if Fig. 9 As shown, a sliding platform is added to the drainage channel protection net 52 to facilitate the rapid transfer of personnel and equipment. A protection net sliding guide rail 54 and a sliding platform 55 are welded on the drainage channel protection net. When an emergency accident of flooding occurs, the sliding platform 55 can be manually operated to transport personnel and important equipment, thereby improving the transfer efficiency of personnel and important equipment.

[0042] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An unpowered emergency drainage device for flooded powerhouses in a hydropower plant, characterized by: It includes a buoyancy assembly, a transmission assembly, a drainage channel and a drainage channel thrust butterfly valve; The buoyancy assembly comprises at least one driving block installed in the hydropower plant, the buoyancy of the driving block in the water being greater than the gravity; The drainage channel thrust butterfly valve is installed in the drainage channel; The transmission assembly comprises a fixed transmission seat, a telescopic power rod and a transmission rod, wherein the fixed transmission seat is fixedly mounted on the base surface; The telescopic power rod is rotatably mounted on the fixed transmission seat, one end of the telescopic power rod is rotatably connected to the driving block, and the other end is a barbed transmission part; The transmission rod is slidably mounted on the fixed transmission seat, one end of the transmission rod is in contact with the transmission part through an arc-shaped groove, and the other end is in contact with the thrust butterfly valve of the drainage channel; When the driving block moves upward or downward under the action force, it drives the telescopic power rod to rotate, and the rotating transmission part drives the transmission rod to move, and the movement of the transmission rod controls the opening and closing of the thrust butterfly valve of the drainage channel. The action force is the buoyancy of the driving block or its own gravity.

2. According to claim 1, the unpowered emergency drainage device for flooded powerhouses in a hydropower plant is characterized by: It also includes a water storage tank connected to the drainage channel, the water storage tank is provided with an exhaust channel, and an exhaust valve is installed on the exhaust channel; An exhaust port telescopic power rod adapted to the exhaust valve is rotatably connected to the transmission rod; When the driving block moves upward or downward under the action force, it drives the telescopic power rod to rotate, and the rotating transmission part drives the transmission rod to move, and the movement of the transmission rod drives the exhaust port telescopic power rod to move, and the movement of the exhaust port telescopic power rod is used to control the opening and closing of the exhaust valve.

3. The unpowered emergency drainage device for flooded powerhouses in a hydropower plant according to claim 1, characterized in that: The driving block is a hollow buoy, which is rotatably connected to the telescopic power rod; The buoyancy assembly also includes a buoy base, a guide member, a height adjustment tube and an upper limit member. The guide member is fixedly mounted on the buoy base, the buoy has a long hole in the vertical direction, the guide member passes through the long hole, the height adjustment tube is mounted on the guide member and is located below the buoy, and the upper limit member is fixedly mounted on the upper part of the buoy.

4. The unpowered emergency drainage device for flooded powerhouses in a hydropower plant according to claim 1, characterized in that: The buoyancy assembly further comprises a floating plate bracket, the driving block is a floating plate, and one side of the floating plate is rotatably connected to the telescopic power rod; The floating plate bracket is installed on the wall of the hydropower plant, and the floating plate is embedded in the middle area of ​​the floating plate bracket. The floating plate can move up and down along the sliding grooves on both sides of the floating plate bracket.

5. The unpowered emergency drainage device for flooded powerhouses in a hydropower plant according to claim 1, characterized in that: The buoyancy assembly also includes a buoy base, on which a rectangular mounting bracket is mounted, and the rectangular mounting bracket has a guide rail; The driving block is a floating block with an oblong hole, the guide rail passes through the oblong hole, and the floating block is rotatably connected to the telescopic power rod; An upper limit member is installed on the upper part of the rectangular mounting bracket.

6. The unpowered emergency drainage device for flooded powerhouses in a hydropower plant according to claim 1, characterized in that: A drainage channel cover plate and a drainage channel protection net are installed in sequence above the water inlet of the drainage channel.

7. The unpowered emergency drainage device for flooded powerhouses in a hydropower plant according to claim 6, characterized in that: A sliding platform is installed above the drainage channel protection net through a protection net sliding track.

8. The unpowered emergency drainage device for flooded powerhouses in a hydropower plant according to claim 2, characterized in that: The water storage tank is provided with a drain pipe, on which a drain valve is installed; A support is installed inside the water storage tank.

9. The unpowered emergency drainage device for flooded powerhouses in a hydropower plant according to claim 2, characterized in that: The drainage channel thrust butterfly valve and the exhaust valve have the same structure, both comprising a butterfly valve body, a butterfly valve plate and a butterfly valve stem. The butterfly valve plate is mounted on the butterfly valve body through the butterfly valve stem, and a spring is mounted on the butterfly valve stem to enable the butterfly valve plate to have a reset function. The telescopic power rod is in contact with the butterfly valve plate, and an arc-shaped sliding groove in contact with the telescopic power rod is provided on the butterfly valve plate.

10. The unpowered emergency drainage device for flooded powerhouses in a hydropower plant according to claim 2, characterized in that: The exhaust valve comprises an exhaust valve plate and a support seat, the exhaust valve plate is mounted on the support seat via a spring, and the support seat is connected to the inner wall of the exhaust passage; the exhaust port telescopic power rod is in contact with the exhaust valve plate.

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