Purging device for water supply and intake of hydroelectric generating set

Abstract

The utility model provides a purging device for a water supply water intake of a hydroelectric generating set, which comprises a gas storage tank, a gulp valve arranged on one side of the gas storage tank, a pressure hose arranged at one end of the gulp valve, a back-flushing valve arranged at one end of the pressure hose, a flow pipe arranged at one end of the back-flushing valve, and a service valve arranged inside the flow pipe, a trash rack is arranged in the flow pipe, and a volute is arranged at one end of the flow pipe. According to the purging device for the water supply and water intake of the hydroelectric generating set, the gas storage tank is matched with the gulp valve, the pressure hose and the back-flushing valve, so that gas in the gas storage tank blows and flushes a trash rack after entering the flow pipe, the trash rack can be cleaned conveniently, and the water supply and water intake of the hydroelectric generating set can be cleaned conveniently. And the operation can be completed without opening a volute man entrance door and a tail water diffusion section door and without entering a flow channel by a worker, so that the safety of the worker during working is improved.

Description

Technical Field

[0001] This utility model relates to the field of hydroelectric generator sets, and in particular to a purging device for the water intake of a hydroelectric generator set. Background Technology

[0002] Hydroelectric generator sets are the power equipment used in hydroelectric power stations to produce electrical energy. When the water flowing through the turbine, it converts the water energy into mechanical energy that drives the machinery to rotate. The generator then converts the mechanical energy back into electrical energy for output. The main function of the unit's technical water supply system is to cool and lubricate the operating equipment. The main components it serves include generator air coolers, generator thrust bearings and guide bearings, turbine guide bearings, water-cooled transformer coolers, and water-cooled air compressors.

[0003] A large amount of floating debris, such as wood blocks, has accumulated at the unit's water intake, clogging the trash racks at the unit's inlet and technical water supply intake, and affecting the normal opening and closing of the guide vanes. This has a significant negative impact on the unit's power generation. Currently, the inlet doors of the spiral casing and tailrace diffuser are manually opened. After ventilation and inspection, personnel enter the flow channel to clean the debris and the trash racks. However, due to the flow channel operation, there is a risk of sudden water inflow, and the limited space poses risks of poisoning and suffocation. The slippery work area and poor lighting also pose risks of slipping, falling from heights, and the governor not depressurizing, which poses a risk of personnel being pinched by the guide vanes. This reduces the safety of the workers during the cleanup.

[0004] Therefore, it is necessary to provide a purging device for the water intake of a hydroelectric generator set to solve the above-mentioned technical problems. Utility Model Content

[0005] This invention provides a purging device for the water intake of a hydroelectric generator set, which solves the problem of cleaning the trash rack in the flow channel by workers.

[0006] To solve the above-mentioned technical problems, this utility model provides a purging device for the water intake of a hydroelectric generator set, comprising:

[0007] gas tank;

[0008] A gas replenishment valve is provided on one side of the gas storage tank. One end of the gas replenishment valve is provided with a pressure hose, and one end of the pressure hose is provided with a backflow valve.

[0009] The flow pipe is located at one end of the backwash valve. A maintenance valve is installed inside the flow pipe. The interior of the flow pipe is also the interior of the trash rack. A volute is installed at one end of the flow pipe.

[0010] Preferably, one end of the pressure hose is fixedly installed at the output end of the air replenishment valve, while the other end is fixedly installed at the input end of the backflush valve.

[0011] Preferably, a telescopic component is fixedly installed on the surface of the flow tube, and a connecting frame is fixedly installed at one end of the telescopic component.

[0012] Preferably, the volute has a sliding hole inside, and a support plate is fixedly connected to one side of the volute.

[0013] Preferably, the support plate has a feed inlet inside and a moving groove inside.

[0014] Preferably, a movable plate is connected inside the movable slot, and an mounting plate is provided at the bottom of the support plate.

[0015] Preferably, one end of the mounting plate is rotatably connected to one end of the bottom of the support plate, while the other end is fixedly installed on one side of the inner wall of the volute.

[0016] Compared with related technologies, the purging device for the water intake of a hydroelectric generator set provided by this utility model has the following beneficial effects:

[0017] This utility model provides a purging device for the water intake of a hydroelectric generator set. By using an air tank in conjunction with an air replenishment valve, a pressure hose, and a backflush valve, the gas inside the air tank enters the interior of the flow pipe and blows air to flush the trash rack. This facilitates the cleaning of the trash rack without opening the volute inlet door and the tailrace diffuser door, and the operation can be completed without personnel entering the flow channel, thus increasing the safety of workers. Attached Figure Description

[0018] Figure 1 A schematic diagram of the structure of a first embodiment of a purging device for a water intake of a hydroelectric generator set provided by this utility model;

[0019] Figure 2 A schematic diagram of the structure of a second embodiment of a purging device for a water intake of a hydroelectric generator set provided by this utility model;

[0020] Figure 3 for Figure 2 The diagram shows the structural schematic of the conveying structure.

[0021] Figure 4 for Figure 2 The enlarged schematic diagram of part A is shown.

[0022] The following are the labels in the diagram: 1. Gas storage tank, 2. Gas replenishment valve, 3. Pressure hose, 4. Backflush valve, 5. Flow pipe, 6. Inspection valve, 7. Trash rack, 8. Volute, 9. Telescopic component, 10. Connecting frame, 11. Support plate, 12. Feed inlet, 13. Moving trough, 14. Moving plate, 15. Sliding hole, 16. Mounting plate. Detailed Implementation

[0023] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0024] First Embodiment

[0025] Please refer to the following: Figure 1 ,in, Figure 1 A schematic diagram of the first embodiment of a purging device for a water intake of a hydroelectric generator set provided by this utility model. A purging device for a water intake of a hydroelectric generator set includes:

[0026] Gas storage tank 1;

[0027] Air supply valve 2, the air supply valve 2 is located on one side of the air storage tank 1, one end of the air supply valve 2 is provided with a pressure hose 3, and one end of the pressure hose 3 is provided with a backflow valve 4;

[0028] The flow pipe 5 is located at one end of the backwash valve 4. The flow pipe 5 is equipped with a maintenance valve 6 inside and a trash rack 7 inside. One end of the flow pipe 5 is equipped with a volute 8.

[0029] One end of the pressure hose 3 is fixedly installed at the output end of the air replenishment valve 2, while the other end is fixedly installed at the input end of the backflow valve 4.

[0030] About 1m after the water intake, after the trash rack 7 and before the water intake valve of the volute 8, a backwash valve 4 is installed to backwash the trash rack 7 with pressurized gas and to relieve pressure.

[0031] Take a sufficiently long pressure hose 3, weld flanges at both ends, connect one end to the backflow valve 4, and the other end to the air supply valve 2, which serves to connect the air supply valve 2 and the backflow valve 4, thus achieving a soft connection between the air supply valve 2 and the backflow valve 4.

[0032] By connecting the backflush valve 4 and the air replenishment valve 2 together through the dedicated pressure hose 3 and closing the maintenance valve 6, a channel is formed consisting of "maintenance air system, air replenishment valve 2, dedicated pressure hose 3, backflush valve 4, flow pipe, water intake trash rack 7, and volute 8". This channel can lead compressed pressure gas to the water intake trash rack 7 to backflush the blockage in the trash rack 7. At the water intake trash rack 7, due to the sudden increase in outlet space and the strong diffusivity of the gas, the compressed pressure gas will rapidly expand at the water intake, forming a shock wave that spreads outward from the water intake, thus dispersing the blockage in the trash rack 7.

[0033] The installation of backflushing valve 4 requires the unit to be shut down and the water system to be drained. It needs to be installed in conjunction with the unit maintenance. The working pressure of the maintenance air system is 0.7-0.8MPa. According to the principle of 1.5 times the maximum working pressure, the design pressure of pressure hose 3 and welded parts is 1.2MPa. The actual pressure that the welded parts of the device and pressure hose 3 can withstand is more than 2.0MPa, which far exceeds the design pressure and meets the pressure resistance requirements.

[0034] The opening diameter of backflush valve 4 is selected because the diameter of the three-stage pipeline in the gas system is 50mm. Therefore, the opening diameter of backflush valve 4 is also designed to be 50mm, so that the diameter of the pipeline at the inlet and outlet ends of backflush valve 4 can be kept consistent.

[0035] The working principle of the purging device for the water intake of a hydroelectric generator set provided by this utility model is as follows:

[0036] In use, after opening the air supply valve 2 and the backflush valve 4, the gas inside the air tank 1 enters the interior of the flow pipe 5 through the pressure hose 3, and then blows air to flush the trash rack 7, thereby cleaning the trash rack 7.

[0037] Compared with related technologies, the purging device for the water intake of a hydroelectric generator set provided by this utility model has the following beneficial effects:

[0038] This utility model provides a purging device for the water intake of a hydroelectric generator set. By using an air tank 1 in conjunction with an air replenishment valve 2, a pressure hose 3, and a backflush valve 4, the gas inside the air tank 1 enters the flow pipe 5 and blows air to flush the trash rack 7. This makes it convenient to clean the trash rack 7 without opening the volute inlet door and the tailrace diffuser door, and without personnel entering the flow channel, thus increasing the safety of workers.

[0039] Second Embodiment

[0040] Please refer to the following: Figure 2 , Figure 3 and Figure 4Based on the purging device for the water intake of a hydroelectric generator set provided in the first embodiment of this application, the second embodiment of this application proposes another purging device for the water intake of a hydroelectric generator set. The second embodiment is merely a preferred embodiment of the first embodiment, and the implementation of the second embodiment will not affect the separate implementation of the first embodiment.

[0041] Specifically, the difference in the second embodiment of this application regarding the purging device for the water intake of a hydroelectric generator set is that, in the purging device for the water intake of a hydroelectric generator set, a telescopic member 9 is fixedly installed on the surface of the flow pipe 5, and a connecting frame 11 is fixedly installed at one end of the telescopic member 9.

[0042] The telescopic component 9 is a hydraulic rod, cylinder, etc., used to extend and retract after startup, thereby driving the moving plate 14 to move to one side.

[0043] The volute 8 has a sliding hole 15 inside, and a support plate 11 is fixedly connected to one side of the volute 8.

[0044] The support plate 11 has a feed inlet 12 inside and a moving groove 13 inside.

[0045] The moving trough 13 is slightly larger than the feed inlet 12, so that after the moving plate 14 moves to a suitable position inside the moving trough 13, the moving plate 14 can be better supported inside the moving trough 13.

[0046] The movable plate 14 is used to seal the feed inlet 12, thereby preventing water from entering the storage space between the mounting plate 16, the volute 8, and the support plate 11 and washing out the branches inside.

[0047] The movable slot 13 is internally connected to a movable plate 14, and the bottom of the support plate 11 is provided with an mounting plate 16.

[0048] The bottom of the movable plate 14 is fixedly installed on the top of the connecting frame 10, so that after the telescopic component 9 is activated, the telescopic component 9 pushes the movable plate 14 to one side.

[0049] One end of the mounting plate 16 is rotatably connected to one end of the bottom of the support plate 11, while the other end is fixedly installed on one side of the inner wall of the volute 8.

[0050] The mounting plate 16 and the volute 8 are limited by bolts. The mounting plate 16 is used to open the mounting plate 16 after one end is removed, so as to facilitate the later cleaning of the storage space between the mounting plate 16, the volute 8 and the support plate 11.

[0051] The working principle of the purging device for the water intake of a hydroelectric generator set provided by this utility model is as follows:

[0052] When in use, when cleaning the trash rack 7, the connecting frame 10 is pushed to one side by activating the telescopic component 9, which connects to the movable plate 14 inside the movable slot 13. After the movable plate 14 is moved to one side and opened, the branches enter between the support plate 11 and the mounting plate 16 for storage.

[0053] After cleaning is completed, the telescopic component 9 is activated to retract, causing the movable plate 14 to move to one side and reset inside the movable groove 13.

[0054] Compared with related technologies, the purging device for the water intake of a hydroelectric generator set provided by this utility model has the following beneficial effects:

[0055] This utility model provides a purging device for the water intake of a hydroelectric generator set. Through the telescopic component 9 and the connecting frame 10, the movable plate 14 moves to one side inside the movable groove 13 and opens, so that the branches cleaned off the trash rack 7 can enter through the feed port 12 and be stored between the support plate 11 and the mounting plate 16. This facilitates unified cleaning later and also prevents the branches from being washed back onto the trash rack 7 when water enters.

[0056] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A purging device for a water supply intake of a hydroelectric generating unit, characterized by, Include: Gas tank; Air valve, the air valve is arranged in one side of the gas tank, one end of the air valve is provided with a pressure hose, one end of the pressure hose is provided with a backflush valve; Flow pipe, the flow pipe is arranged in one end of the backflush valve, the inside of the flow pipe is provided with a maintenance valve, the inside of the flow pipe is provided with the inside of the trash rack, one end of the flow pipe is provided with a volute.

2. A purging device for a water supply intake of a hydroelectric generating unit according to claim 1, characterized in that, One end of the pressure hose is fixedly installed with the output end of the air valve, and the other end is fixedly installed with the input end of the backflush valve.

3. A purging device for a water supply intake of a hydroelectric generating unit according to claim 1, characterized in that, The surface of the flow pipe is fixedly installed with a telescopic piece, one end of the telescopic piece is fixedly installed with a connecting frame.

4. A purging device for a water supply intake of a hydroelectric generating unit according to claim 1, characterized in that, The inside of the volute is provided with a sliding hole, and one side of the volute is fixedly connected with a support plate.

5. A purging device for a water supply intake of a hydroelectric generating unit according to claim 4, wherein, The inside of the support plate is provided with a feeding port, and the inside of the support plate is provided with a moving groove.

6. A purging device for a water supply intake of a hydroelectric generating unit according to claim 5, wherein, The inside of the moving groove is connected with a moving plate, and the bottom of the support plate is provided with a mounting plate.

7. A purging device for a water supply intake of a hydroelectric generating unit according to claim 6, wherein, One end of the mounting plate is rotatably connected with one end of the bottom of the support plate, and the other end is fixedly installed on one side of the inner wall of the volute.

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