Leak detection device for hydroelectric generator set speed regulation system

Abstract

The utility model relates to generator unit overhauls technical field, concretely for a kind of leak detector for water-turbine generator unit governing system, including main oil circuit system and booster oil circuit system, main oil circuit system includes main oil circuit pipeline assembly and low-pressure oil pump, low-pressure oil pump is installed in main oil circuit pipeline assembly middle part for driving the movement of internal oil liquid;The input end of main booster oil circuit system is communicated with the output port of filter, and the output end of booster oil circuit system is communicated with the main oil circuit oil outlet pipe of main oil circuit pipeline assembly end portion. The present application is used for the detection end of water-turbine generator unit governing system by main oil circuit system, after realizing stable pressure boost by low-pressure oil pump, then boost to test pressure by booster oil circuit system, it is especially suitable for the quality of sealing installation is pre-boosted leak detection after governing system pipeline overhaul is completed, to avoid the security risk caused by sealing failure when traditional overall boost detection.

Description

Technical Field

[0001] This utility model relates to the field of generator set maintenance technology, and in particular to a leak detection device for the speed regulation system of a hydro-generator set. Background Technology

[0002] The speed control system of a hydro-generator unit is a core control unit ensuring stable operation of the unit. The sealing performance of its hydraulic pipelines and valves directly affects the system's pressure transmission efficiency and response accuracy. During routine power plant maintenance, the speed control system requires periodic inspection and reinstallation of pipelines, valves, and other components. However, current technologies have significant shortcomings in the methods for inspecting the sealing quality of pipelines and valves after maintenance: they typically rely on visual inspection or manual pressure testing, making it difficult to comprehensively assess sealing reliability; and more critical inspections are often delayed until the overall system pressurization phase.

[0003] Traditional methods rely on observing the pressure drop after overall pressurization. If there is a seal failure at this time, leakage of high-pressure medium may cause system depressurization, equipment damage or even safety accidents. The segmented pressure testing method requires repeated disassembly and assembly of pipelines and relies on manual experience to make judgments. The operation is cumbersome and easy to introduce secondary installation errors.

[0004] Therefore, a leak detection device for the speed control system of hydro-generator sets is needed to improve the above-mentioned problems. Utility Model Content

[0005] The technical problem to be solved by this utility model is to address the problems existing in the background art and provide a leak detection device for the speed regulation system of a hydro-generator set. The device is connected to the detection end of the speed regulation system of the hydro-generator set through the main oil circuit system. After stable pressurization is achieved by the low-pressure oil pump, the device is further pressurized to the test pressure through the pressurization oil circuit system. It is particularly suitable for pre-pressurization leak detection of the sealing installation quality after the speed regulation system pipeline has been repaired, thereby avoiding the safety risks caused by seal failure during traditional overall pressurization testing.

[0006] To achieve the above-mentioned technical features, the purpose of this utility model is as follows: A leak detection device for a hydro-generator speed control system, comprising: The main oil circuit system includes a main oil circuit pipeline assembly, an oil inlet filter, and a low-pressure oil pump. The filter and the low-pressure oil pump are installed sequentially in the middle of the main oil circuit pipeline assembly to filter the oil and drive the internal oil movement. The input end of the main oil circuit pipeline assembly is used to connect with the oil collection tank of the speed regulation system, and the output end is used to connect with the speed regulation system of the hydro-generator unit. The main booster oil circuit system has its input end connected to the output port of the filter, and its output end connected to the main oil outlet pipe at the end of the main oil circuit pipeline assembly.

[0007] The main oil pipeline assembly includes a main oil inlet pipe, one end of which is provided with a main oil inlet interface for connecting a hose. The end of the main oil inlet pipe away from the main oil inlet interface is connected to a main oil high-pressure three-way valve. The middle part of the main oil inlet pipe is connected to the inlet of the oil filter through a pipeline. The oil filter is provided with several output ports. One of the output ports of the oil filter is connected to a filtered oil outlet pipe. The filtered oil outlet pipe is connected to a low-pressure oil pump. The output end of the low-pressure oil pump is connected to one interface of the main oil high-pressure three-way valve. The other interface of the main oil high-pressure three-way valve is connected to a main oil high-pressure shut-off valve through a pipeline. The output end of the main oil high-pressure shut-off valve is connected to a main oil outlet pipe. The end of the main oil outlet pipe is connected to a main oil outlet interface, which is used to connect to the turbine generator speed control system through a hose.

[0008] A flow meter is installed on the pipeline connecting the main oil inlet pipe and the oil inlet filter.

[0009] The main booster oil circuit system includes a servo pump station, with a servo pump installed at the end of the servo pump station. The input end of the servo pump is connected to the output port of the oil inlet filter through the booster oil inlet pipeline, and the output end of the servo pump is connected to the main oil circuit outlet pipe through a pipeline.

[0010] It also includes a control oil circuit system, which includes several hydraulic directional valves, oil circuit blocks, and several electric valves. Each electric valve is fitted with a connecting pipe a, a connecting pipe b, and a connecting pipe c. One end of each connecting pipe a is fitted with an oil circuit block. Several connecting pipes c are fitted with several hydraulic directional valves respectively. One of the connecting pipes b is connected to a pressurization pipe, and a high-pressure shut-off valve is installed on the pressurization pipe. The pressurization pipe is fitted with the main oil circuit outlet pipe. The ends of the remaining connecting pipes b are connected to control oil circuit drain pipes, and each control oil circuit drain pipe is fitted with a high-pressure shut-off valve a. The output end of the servo pump is connected to the corresponding hydraulic directional valve through the pressurized oil circuit. The oil pressurized by the servo pump flows sequentially through the hydraulic directional valve, connecting pipe c, connecting pipe b and pressurized pipe into the main oil circuit outlet pipe, thus pressurizing the oil in the main oil circuit outlet pipe.

[0011] Several of the hydraulic directional valves are connected to a plate cooler via a return oil line. Several high-pressure return oil filters are installed on the return oil line. The output end of the plate cooler is connected to the inside of the inlet filter via a cooling filter pipe.

[0012] It also includes a backup booster oil circuit system, which includes several pneumatic oil pumps and several accumulators. The lower end of each accumulator is connected to an accumulator docking terminal. The several accumulator docking terminals are respectively set on several connecting pipes b. The several pneumatic oil pumps are connected to the oil circuit block through a pneumatic booster pipe a. The pneumatic booster pipe a is internally connected to several connecting pipes c through the oil circuit block. The oil circuit block is connected to the inlet filter through a backup inlet pipe. The incoming oil is pressurized by the pneumatic oil pumps and accumulators and then enters the booster pipe through the connecting pipe b. It then enters the main oil circuit outlet pipe for boosting.

[0013] It also includes a pressure detection system, which includes several pressure gauges, and the pressure gauges are connected to the pipelines of the control oil circuit system, the main booster oil circuit system and the backup booster pipeline system through pressure gauge pipes to monitor the system pressure.

[0014] It also includes a main frame, which is a rectangular mounting frame. The mounting frame has two mounting areas, upper and lower. The main oil circuit system is installed in the lower mounting area, the main booster oil circuit system is installed in the lower mounting area, the backup booster oil circuit system is installed in the upper mounting area, and the control oil circuit system is installed in the upper mounting area. The mounting frame is open on all four sides, and an oil receiving groove is provided in the lower mounting area.

[0015] The lower end of the mounting frame is equipped with casters on all four sides.

[0016] Compared with the prior art, the present utility model adopting the above technical solution has the following outstanding features: This invention relates to a low-pressure oil pump that connects to the main oil pipeline assembly. The low-pressure oil pump allows oil to flow along the main oil pipeline assembly, whose two ends connect to the oil collection tank of the speed control system and the test end of the hydro-generator speed control system, respectively. The low-pressure oil pump draws oil and pumps it to the hydro-generator speed control system for preliminary pressurization testing. An inlet filter filters the oil. The main pressurization oil circuit system is used for pressurization testing of the hydro-generator speed control system at low flow and high pressure. This invention connects the main oil circuit system to the test end of the hydro-generator speed control system. After achieving stable pressurization with the low-pressure oil pump, the pressurization oil circuit system further pressurizes the system to the test pressure. This is particularly suitable for pre-pressurization leak testing of the sealing installation quality after the speed control system pipeline has been repaired, thus avoiding the safety risks caused by seal failure during traditional overall pressurization testing. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0018] Figure 1 This is a first-person perspective view of the overall three-dimensional structure of this utility model.

[0019] Figure 2 This is a second-view overall three-dimensional structural diagram of the present invention.

[0020] Figure 3 This is a first-view three-dimensional structural diagram of the pipeline system in this utility model.

[0021] Figure 4 This is a second-view three-dimensional structural diagram of the pipeline system in this utility model.

[0022] Figure 5 This is a third-view three-dimensional structural diagram of the pipeline system in this utility model.

[0023] Figure 6 This is a four-dimensional structural diagram of the pipeline system in this utility model from a fourth perspective.

[0024] In the diagram: 1. Mounting frame; 2. System power distribution box; 3. Control panel; 4. Oil inlet tank; 5. Inlet filter; 6. Casters; 7. Low-pressure oil pump; 8. Servo pump station; 9. Accumulator; 10. High-pressure return oil filter; 11. Pressure gauge; 12. Pneumatic oil pump; 13. Hydraulic directional valve; 14. Main oil circuit inlet pipe; 15. Main oil circuit inlet interface; 16. Flow meter; 17. Plate cooler; 18. Pressure gauge pipe; 19. Return oil pipe; 20. Control oil circuit shut-off valve; 20. Main oil circuit high-pressure three-way valve. 21. Main oil circuit high-pressure shut-off valve; 22. Main oil circuit oil outlet interface; 23. Cooling filter pipe; 24. Electric valve; 25. Control oil circuit drain pipe; 26. High-pressure shut-off valve a; 27. High-pressure shut-off valve; 28. Pressurized oil circuit; 29. ​​Accumulator docking terminal; 30. Servo pump; 31. Oil circuit block; 32. Pressurized pipeline; 33. Filtered oil outlet pipeline; 34. Connecting pipeline a; 35. Connecting pipeline b; 36. Connecting pipeline c; 37. Main oil circuit oil outlet pipe; 38. Spare oil inlet pipeline; 39. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0026] To facilitate understanding of this utility model, a more comprehensive description of it will be provided below with reference to relevant embodiments. Several embodiments of this utility model are given. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this utility model will be more thorough and complete.

[0027] It should be noted that when a component is said to be "fixed to" another component, it can be directly on the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0029] Example 1: Please refer to Figure 1 , 2 3, a leak detection device for a hydro-generator speed control system, comprising: The main oil circuit system includes a main oil circuit pipeline assembly, an oil inlet filter 5, and a low-pressure oil pump 7. The filter 5 and the low-pressure oil pump 7 are installed sequentially in the middle of the main oil circuit pipeline assembly for filtering the oil and driving the internal oil movement. The input end of the main oil circuit pipeline assembly is used to connect with the oil collection tank of the speed regulation system, and the output end is used to connect with the speed regulation system of the hydro-generator set. The main booster oil circuit system has its input end connected to the output port of the filter 5, and its output end connected to the main oil outlet pipe 38 at the end of the main oil circuit pipeline assembly.

[0030] The low-pressure oil pump 7 is connected to the main oil pipeline assembly. The low-pressure oil pump 7 allows oil to flow along the main oil pipeline assembly. The two ends of the main oil pipeline assembly are connected to the oil collection tank of the speed control system and the end to be tested in the turbine generator speed control system, respectively. The low-pressure oil pump 7 is used to extract oil and pump it into the turbine generator speed control system for preliminary pressure testing. The inlet filter 5 is used to filter the oil.

[0031] The main booster oil circuit system is used for boosting and testing the speed regulation system of hydro-generator sets under low flow and high pressure.

[0032] See Figure 3 The main oil circuit piping assembly includes a main oil circuit inlet pipe 14. One end of the main oil circuit inlet pipe 14 is equipped with a main oil circuit inlet interface 15 for connecting a hose. The end of the main oil circuit inlet pipe 14 furthest from the main oil circuit inlet interface 15 is connected to a main oil circuit high-pressure three-way valve 21. The middle section of the main oil circuit inlet pipe 14 is connected to the inlet of the inlet filter 5 via a pipe. The inlet filter 5 is equipped with several output ports. One of the output ports of the inlet filter 5 is connected to a filtered oil outlet pipe 34. The rear oil outlet pipeline 34 is connected to a low-pressure oil pump 7. The output end of the low-pressure oil pump 7 is connected to one of the interfaces of the main oil circuit high-pressure three-way valve 21. The other interface of the main oil circuit high-pressure three-way valve 21 is connected to the main oil circuit high-pressure shut-off valve 22 through a pipeline. The output end of the main oil circuit high-pressure shut-off valve 22 is connected to the main oil circuit outlet pipe 38. The end of the main oil circuit outlet pipe 38 is connected to the main oil circuit outlet interface 23. The main oil circuit outlet interface 23 is used to connect to the speed regulation system of the hydro-generator unit through a hose.

[0033] During use, in the oil pumping stage, switch the main oil circuit high-pressure three-way valve 21 to the output end of the low-pressure oil pump 7 and connect it to the main oil circuit outlet pipe 38, and start the low-pressure oil pump 7. At this time, the oil in the oil collection tank passes through the main oil circuit inlet port 15, the inlet filter 5, the filtered outlet pipe 34, the main oil circuit high-pressure three-way valve 21, the main oil circuit high-pressure shut-off valve 22, and the main oil circuit outlet pipe 38, and is then pumped out from the main oil circuit outlet port 23 to initially pressurize the hydro-generator speed regulation system. After reaching a certain pressure, close the main oil circuit high-pressure shut-off valve 22.

[0034] After the leak detection is completed, the low-pressure oil pump 7 is in the off state. The main oil circuit high-pressure shut-off valve 22 is opened, and the main oil circuit high-pressure three-way valve 21 is switched to the state where the main oil circuit outlet pipe 38 and the main oil circuit inlet pipe 14 are connected. The oil in the hydro-generator speed regulation system returns to the oil collection tank through the main oil circuit outlet pipe 38, the main oil circuit high-pressure shut-off valve 22, the main oil circuit high-pressure three-way valve 21 and the main oil circuit inlet pipe 14.

[0035] Further, see Figure 3 A flow meter 16 is installed on the pipeline connecting the main oil inlet pipe 14 and the oil inlet filter 5. The flow meter 16 is used to detect the amount of oil flowing through the pipeline.

[0036] See Figure 2 , 4The main booster oil circuit system includes a servo pump station 8, with a servo pump 31 installed at the end of the servo pump station 8. The input ends of the servo pump 31 are connected to the output ports of the inlet filter 5 via booster oil inlet pipes, and the output ends of the servo pump 31 are connected to the main oil circuit outlet pipe 38 via pipelines. By setting up the servo pump station 8 and servo pump 31, precise pressure testing of the hydro-generator speed control system is achieved. Figure 4 In the middle, the servo pump station 8 is a servo motor, and the output end of the servo motor is equipped with a matching servo pump 31, which is a servo oil pump.

[0037] The main pressurization pipeline is pressurized mainly through the servo pump station 8. The oil in the inlet filter 5 is pumped in and pressurized by the servo pump 31. After pressurization, it is delivered to the reversing valve 13 through the pressurization oil circuit 29 and the hydraulic reversing valve 13. Through the action of the reversing valve 13, it passes through the connecting pipeline c37, the connecting pipeline b36 and the pressurization pipeline in sequence and enters the main oil circuit outlet pipe 38 for pressurization.

[0038] During use, after the high-pressure shut-off valve 22 of the main oil circuit is closed, oil continues to be pumped through the main booster oil circuit system, thereby performing a small-flow, high-pressure booster test on the speed regulation system of the hydro-generator unit.

[0039] Example 2: Based on Example 1, see Figure 4 , 5 The present invention also includes a control oil circuit system, which includes several hydraulic directional valves 13, an oil circuit block 32, and several electric valves 25. Each electric valve 25 is fitted with a connecting pipe a35, a connecting pipe b36, and a connecting pipe c37. One end of each connecting pipe a35 is fitted with the oil circuit block 32. Several connecting pipes c37 are fitted with several hydraulic directional valves 13 respectively. One of the connecting pipes b36 is connected to a pressurizing pipe 33. A high-pressure shut-off valve 28 is installed on the pressurizing pipe 33, and the pressurizing pipe 33 is fitted with the main oil circuit outlet pipe 38. The ends of the remaining connecting pipes b36 are connected to control oil circuit drain pipes 26, and a high-pressure shut-off valve a27 is installed on each control oil circuit drain pipe 26.

[0040] The output end of the servo pump 31 is connected to the corresponding hydraulic directional valve 13 through the pressurized oil circuit 29. The oil pressurized by the servo pump 31 flows sequentially through the hydraulic directional valve 13, connecting pipe c37, connecting pipe b36 and pressurized pipe 33 into the main oil circuit outlet pipe 38, which pressurizes the oil in the main oil circuit outlet pipe 38.

[0041] In use, by operating the corresponding hydraulic directional valve 13 and electric valve 25, the oil pressurized by the servo pump 31 flows sequentially through the hydraulic directional valve 13, connecting pipe c37, connecting pipe b36, and pressurization pipe 33 into the main oil circuit outlet pipe 38. The control oil circuit drain pipe 26 is used to drain the oil in the control oil circuit system after detection contact.

[0042] Further, see Figure 4 , 5 6. Several hydraulic directional valves 13 are connected to plate coolers 17 via return oil lines 19. Several high-pressure return oil filters 10 are installed on the return oil lines 19. The output end of the plate cooler 17 is connected to the inlet filter 5 via a cooling filter pipe 24. When the hydraulic directional valves 13 reverse the return oil flow, the high-pressure oil passes through the return oil lines 19 and is filtered by the high-pressure return oil filters 10. The filtered oil is then cooled by the plate cooler 17 before flowing into the inlet filter 5.

[0043] Example 3: Based on Example 1 or Example 2, see Figure 3 , 5 The present invention also includes a backup booster oil circuit system, which includes several pneumatic oil pumps 12 and several accumulators 9. Each accumulator 9 has an accumulator docking end 30 connected to its lower end. Several accumulator docking ends 30 are respectively set on several connecting pipes b36. Several pneumatic oil pumps 12 are connected to the oil circuit block 32 through a pneumatic booster pipe a. The pneumatic booster pipe a is internally connected to several connecting pipes c37 through the oil circuit block 32. The oil circuit block 32 is connected to the inlet filter 5 through a backup inlet oil pipe 39. The incoming oil is pressurized by the pneumatic oil pumps 12 and the accumulators 9, and then enters the pressurization pipe 33 through the connecting pipe b36. It then enters the main oil circuit outlet pipe 38 for pressurization through the pressurization pipe 33.

[0044] The backup booster oil circuit system adopts pneumatic boosting. It serves as an emergency backup when the main booster oil circuit system is unavailable. Specifically, the oil enters the pneumatic oil pump 12 through the inlet filter 5 and the backup inlet pipeline 39. The pneumatic oil pump 12 is internally connected to the connecting pipeline c37 through the pneumatic booster pipeline a. The oil is delivered to each electric valve 25 through the connecting pipeline c37. Under the action of the electric valve 25, the oil is reversed and output through the connecting pipeline b36. The connecting pipeline b36 is connected to the accumulator 9. The accumulator 9 performs secondary pressurization. The pressurized oil enters the main oil circuit outlet pipe 38 through the pressurization pipeline 33.

[0045] Accumulator 9 is a hydraulic accumulator. As a type of pressure vessel, its core function is to store hydraulic energy. Its internal structure includes a diaphragm or piston, which can seal and compress an inert gas, usually nitrogen. When the inert gas is compressed or expanded, hydraulic oil is drawn in or discharged accordingly, thereby achieving the storage and release of energy.

[0046] Example 4: Based on Example 1, Example 2, or Example 3, see [link to example]. Figure 3 This utility model also includes a pressure detection system, which includes a plurality of pressure gauges 11. These pressure gauges 11 are connected to pipelines in the control oil circuit system, the main booster oil circuit system, and the backup booster pipeline system via pressure gauge pipes 18 to monitor the system pressure and ensure the smooth operation of the detection work. In this embodiment, the pressure gauges 11 are pressure transmitters.

[0047] Example 5: Based on Example 1, Example 2, Example 3, or Example 4, see [link to example]. Figure 1 , 2 The present invention also includes a main frame, which is a rectangular mounting frame 1. The mounting frame 1 has two mounting areas, upper and lower. The main oil circuit system is installed in the lower mounting area of ​​the mounting frame 1, the main booster oil circuit system is installed in the lower mounting area of ​​the mounting frame 1, the backup booster oil circuit system is installed in the upper mounting area of ​​the mounting frame 1, and the control oil circuit system is installed in the upper mounting area of ​​the mounting frame 1. The mounting frame 1 is open on all four sides, and an oil receiving groove 4 is provided in the lower mounting area of ​​the mounting frame 1.

[0048] Furthermore, casters 6 are installed around the lower end of the mounting frame 1.

[0049] With the above structure, all systems are integrated into the mounting frame 1, making it easy to transport the leak detection device of this utility model to the site for use.

[0050] Example 6: Based on Example 1, Example 2, Example 3, Example 4, or Example 5, see [link to example]. Figure 1 The present invention also includes a control system, which includes a control panel 3 installed at the front end of the upper area of ​​the mounting frame 1. A system power distribution box 2 is provided on one side of the control panel 3. The control panel 3 controls the operation of the main oil circuit system, the booster oil circuit system and the electrical components on the control oil circuit system.

[0051] Specifically, the control panel 3 integrates a setup HMI touchscreen, which displays real-time pressure, flow rate, and operating status, as well as digital parameter instruments, abnormal alarms, function selection buttons, and other control devices. It is equipped with a Siemens S7-200 PLC, which collects analog signals from pressure sensors and signals from flow meter 16, pressure gauge 11, etc., and inputs them into the PLC system. The PLC converts the voltage / current value signals input from the sensors into operating status data. When abnormal parameters such as flow rate, pressure, and execution status are detected, the system will issue a warning signal to remind the operator to make corresponding adjustments.

[0052] While specific embodiments of the present invention have been described above, those skilled in the art should understand that the specific embodiments described are merely illustrative and not intended to limit the scope of the present invention. Any modifications and variations made by those skilled in the art in accordance with the spirit of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A leak detection device for a hydro-generator speed control system, characterized in that, include: The main oil circuit system includes a main oil circuit pipeline assembly, an oil inlet filter (5), and a low-pressure oil pump (7). The filter (5) and the low-pressure oil pump (7) are installed in the middle of the main oil circuit pipeline assembly to filter the oil and drive the internal oil movement. The input end of the main oil circuit pipeline assembly is used to connect with the oil collection tank of the speed regulation system, and the output end is used to connect with the speed regulation system of the hydro-generator set. The main booster oil circuit system has its input end connected to the output port of the filter (5) and its output end connected to the main oil outlet pipe (38) at the end of the main oil circuit pipeline assembly.

2. The leak detection device for a hydro-generator speed control system according to claim 1, characterized in that: The main oil circuit pipeline assembly includes a main oil circuit inlet pipe (14), one end of which is provided with a main oil circuit inlet interface (15) for connecting a hose. The end of the main oil circuit inlet pipe (14) away from the main oil circuit inlet interface (15) is connected to a main oil circuit high-pressure three-way valve (21). The middle part of the main oil circuit inlet pipe (14) is connected to the inlet of the inlet filter (5) through a pipeline. The inlet filter (5) is provided with several output ports. One of the output ports of the inlet filter (5) is connected to the filtered oil outlet pipe (34). The filtered oil outlet pipeline (34) is connected to a low-pressure oil pump (7). The output end of the low-pressure oil pump (7) is connected to one of the interfaces of the main oil circuit high-pressure three-way valve (21). The other interface of the main oil circuit high-pressure three-way valve (21) is connected to the main oil circuit high-pressure shut-off valve (22) through a pipeline. The output end of the main oil circuit high-pressure shut-off valve (22) is connected to the main oil circuit outlet pipe (38). The end of the main oil circuit outlet pipe (38) is connected to the main oil circuit outlet interface (23). The main oil circuit outlet interface (23) is used to connect to the speed regulation system of the hydro-generator unit through a hose.

3. The leak detection device for the speed regulation system of a hydro-generator unit according to claim 2, characterized in that: A flow meter (16) is installed on the pipeline connecting the main oil inlet pipeline (14) and the oil inlet filter (5).

4. The leak detection device for the speed regulation system of a hydro-generator unit according to claim 1, characterized in that: The main booster oil circuit system includes a servo pump station (8), and a servo pump (31) is installed at the end of the servo pump station (8). The input end of the servo pump (31) is connected to the output port of the oil inlet filter (5) through the booster oil inlet pipeline. The output end of the servo pump (31) is connected to the main oil circuit outlet pipe (38) through the pipeline.

5. The leak detection device for a hydro-generator speed control system according to claim 4, characterized in that: It also includes a control oil circuit system, which includes several hydraulic directional valves (13), oil circuit blocks (32) and several electric valves (25). Each electric valve (25) is connected to a connecting pipe a (35), a connecting pipe b (36) and a connecting pipe c (37). One end of each connecting pipe a (35) is connected to the oil circuit block (32). Several connecting pipes c (37) are connected to several hydraulic directional valves (13). One of the connecting pipes b (36) is connected to a pressurizing pipe (33). A high-pressure shut-off valve (28) is installed on the pressurizing pipe (33). The pressurizing pipe (33) is connected to the main oil circuit outlet pipe (38). The ends of the remaining connecting pipes b (36) are connected to control oil circuit drain pipes (26). Each control oil circuit drain pipe (26) is equipped with a high-pressure shut-off valve a (27). The output end of the servo pump (31) is connected to the corresponding hydraulic directional valve (13) through the pressurized oil circuit (29). The oil pressurized by the servo pump (31) flows sequentially through the hydraulic directional valve (13), connecting pipe c (37), connecting pipe b (36) and pressurized pipe (33) into the main oil circuit outlet pipe (38), thereby pressurizing the oil in the main oil circuit outlet pipe (38).

6. The leak detection device for the speed regulation system of a hydro-generator unit according to claim 5, characterized in that: Several of the hydraulic directional valves (13) are connected to a plate cooler (17) via a return oil line (19). Several high-pressure return oil filters (10) are installed on the return oil line (19). The output end of the plate cooler (17) is connected to the inside of the inlet filter (5) via a cooling filter pipe (24).

7. The leak detection device for the speed regulation system of a hydro-generator unit according to claim 5, characterized in that: It also includes a backup booster oil circuit system, which includes several pneumatic oil pumps (12) and several accumulators (9). Each accumulator (9) has an accumulator docking end (30) connected to its lower end. Several accumulator docking ends (30) are respectively set on several connecting pipes b (36). Several pneumatic oil pumps (12) are connected to the oil circuit block (32) through a pneumatic booster pipe a. The pneumatic booster pipe a is connected to several connecting pipes c (37) through the oil circuit block (32). The oil circuit block (32) is connected to the inlet filter (5) through a backup inlet pipe (39). The oil entering is pressurized by the pneumatic oil pumps (12) and the accumulators (9) and then enters the pressurization pipe (33) through the connecting pipe b (36). It then enters the main oil circuit outlet pipe (38) through the pressurization pipe (33) for pressurization.

8. The leak detection device for the speed regulation system of a hydro-generator unit according to claim 7, characterized in that: It also includes a pressure detection system, which includes several pressure gauges (11), and the pressure gauges (11) are connected to the pipelines on the control oil circuit system, the main boost oil circuit system and the backup boost pipeline system through pressure gauge pipes (18) to monitor the system pressure.

9. The leak detection device for the speed regulation system of a hydro-generator unit according to claim 8, characterized in that: It also includes a main frame, which is a rectangular mounting frame (1). The mounting frame (1) has two mounting areas, upper and lower. The main oil circuit system is installed in the lower mounting area of ​​the mounting frame (1), the main booster pipeline system is installed in the lower mounting area of ​​the mounting frame (1), the backup booster pipeline system is installed in the upper mounting area of ​​the mounting frame (1), and the control oil circuit system is installed in the upper mounting area of ​​the mounting frame (1). The mounting frame (1) is open on all four sides, and an oil receiving groove (4) is provided in the lower mounting area of ​​the mounting frame (1).

10. The leak detection device for the speed regulation system of a hydro-generator unit according to claim 9, characterized in that: The lower end of the mounting frame (1) is equipped with casters (6) around its perimeter.

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