Steam turbine bypass regulating valve hot test system and test method

Abstract

This invention relates to a hot-state testing system and method for a steam turbine bypass regulating valve. The system includes a boiler, a pneumatic sleeve regulating valve, an electro-hydraulic quick-opening valve, a vacuum condenser, a water ring vacuum pump, a cooling water system, a compressed air system, and a data acquisition system, forming a closed-loop test circuit. The method includes: starting the boiler to generate steam, implementing a step change test of the flow rate through interlocking control, adjusting the back pressure and vacuum degree, and collecting valve performance data. This invention can simulate high temperature, high pressure difference, and high-speed steam conditions, achieving comprehensive verification of the valve's hot-state performance and reliability, and is suitable for the research and development and testing of domestically produced valves.

Description

Technical Field

[0001] This invention relates to the technical field of steam turbine generator set testing systems, and in particular to a hot-state testing system and method for a steam turbine bypass regulating valve. Background Technology

[0002] As a core component of the turbine bypass system in nuclear power plants, the turbine bypass control valve must achieve precise regulation under harsh conditions such as high temperature, high pressure differential, and high-speed steam media. Its core components must possess comprehensive properties including impact resistance, high temperature resistance, and cavitation resistance. Furthermore, these valves have long relied on imports, with foreign suppliers monopolizing the market, leading to significant supply chain risks, long procurement cycles, and high costs, thus hindering the large-scale development of nuclear power technology in my country.

[0003] The hot-state testing system for turbine bypass control valves is mainly used to solve the key verification problem between "laboratory qualification" and "field reliability". Its core value lies in the verification of valve performance and reliability, system matching and parameter tuning, and support for localization and independent control. Summary of the Invention

[0004] In view of the shortcomings of the existing production technology, the applicant provides a hot test system and test method for a steam turbine bypass regulating valve.

[0005] The technical solution adopted in this invention is as follows: A hot test system for a steam turbine bypass regulating valve includes a boiler. The boiler outlet is sequentially connected via pipelines to a main gate valve, a desuperheating and pressure reducing device, a pneumatic sleeve regulating valve, an electric regulating valve, a vacuum condenser, a condensate tank, a condensate pump, a low-pressure heater, a deaerator, a feedwater pump, and a high-pressure heater. The output of the high-pressure heater returns to the boiler, forming a closed-loop steam circuit. An electro-hydraulic quick-opening valve is installed in parallel with the pneumatic sleeve regulating valve. The pneumatic sleeve regulating valve and the electro-hydraulic quick-opening valve are interlocked and controlled to achieve rapid adjustment of the flow rate of the pneumatic sleeve regulating valve while maintaining a stable steam flow rate in the boiler. The vacuum condenser is connected to a cooling water system, which includes a No. 1 butterfly valve, a water filter and an electromagnetic flow meter connected in sequence, as well as a No. 2 butterfly valve that is connected separately to the vacuum condenser. It also includes a water ring vacuum pump, whose pump port is connected to the vacuum condenser via a pipe for evacuating the condenser. It also includes a compressed air system connected to the pneumatic sleeve regulating valve, which consists of an air tank, a pressure reducing valve and a valve positioner connected in series, and is used to control the opening and closing of the pneumatic sleeve regulating valve; It also includes a data acquisition system, which consists of sensors, steady-state isolators, steady-state acquisition devices, and industrial control computers, used to realize the remote transmission and acquisition of test parameters.

[0006] As a further improvement to the above technical solution: A large-diameter electric gate valve and a large-diameter flow orifice plate are installed in series on the pipeline between the steam pipeline safety valve and the pneumatic sleeve regulating valve. A small-diameter electric gate valve and a small-diameter flow orifice plate are arranged in parallel on the large-diameter electric gate valve and the large-diameter flow orifice plate.

[0007] Cooling water for the vacuum condenser enters the vacuum condenser through butterfly valve No. 1, water filter, and electromagnetic flow meter, and then exits through butterfly valve No. 2.

[0008] The water ring vacuum pump has two shut-off valves installed at its suction port.

[0009] The liquid level in the vacuum condenser is replenished via a water tank.

[0010] The liquid level in the vacuum condenser is regulated by a condensate pump, check valve, shut-off valve, and three-way valve to ensure a stable liquid level.

[0011] The compressed air system also includes a compressed air safety valve installed on the air tank.

[0012] A steam pipeline safety valve is installed at the output end of the desuperheating and pressure reducing device.

[0013] An electric regulating valve is installed between the pneumatic sleeve regulating valve and the vacuum condenser.

[0014] A test method for a hot-state test system for a steam turbine bypass regulating valve includes the following operating steps: Step 1: Cool the vacuum condenser through a cooling water system. The cooling water enters the condenser after being filtered by a water filter and monitored by an electromagnetic flow meter. Step 2: Start the No. 1 condensate pump. The condensate flows through the No. 1 check valve and the No. 1 shut-off valve to the three-way valve. The three-way valve determines the ratio of condensate flow through the No. 2 shut-off valve and the No. 2 check valve based on the liquid level in the vacuum condenser to ensure a stable liquid level. Step 3: Start the boiler to generate high-temperature and high-pressure steam. The steam enters the test section after being regulated by the desuperheating and pressure reducing device. Step 4: By interlocking the pneumatic sleeve regulating valve and the parallel electro-hydraulic quick-opening valve, the flow rate of the regulating valve can be tested for step change, while maintaining the basic stability of the steam flow rate of the boiler. Step 5: Adjust the opening of the electric regulating valve to change the back pressure of the pneumatic sleeve regulating valve and simulate the valve performance under different working conditions; Step 6: Evacuate the vacuum condenser using a water ring vacuum pump, adjust the pressure difference across the valve, and expand the test operating range; Step 7: The data acquisition system collects the pressure, temperature, flow rate, and opening degree signals before and after the valve in real time, and transmits them to the industrial control computer for analysis and storage via a steady-state isolator and a steady-state acquisition device; Step 8: After the test is completed, gradually close all valves and equipment to stop the boiler operation.

[0015] The beneficial effects of this invention are as follows: I. In terms of system structure: (1) This invention constructs a closed-loop simulation test platform for all operating conditions: The system consists of a boiler, desuperheating and pressure reducing device, condenser, heater, pump set, etc., forming a complete steam power circulation loop. It can realistically reproduce the high temperature, high pressure, and high speed steam conditions in actual power plant operation, and provide test conditions for bypass regulating valves that approximate the field environment.

[0016] (2) This invention enables precise assessment of the dynamic performance of valves: By connecting a pneumatic sleeve regulating valve and an electro-hydraulic quick-opening valve in parallel and setting up interlock control, the inherent defect of boiler steam flow not responding quickly is solved. This system can perform dynamic tests on the valve, such as flow step and rapid opening / closing, effectively verifying the valve's regulation stability, response speed, and sealing performance under transient operating conditions.

[0017] (3) This invention provides a wide range of adjustable test parameters: 3.1 Adjustable flow rate: By using large and small diameter flow orifice plates connected in parallel, accurate measurement of the entire flow range from low load to full load can be achieved.

[0018] 3.2 Adjustable differential pressure: By using a water ring vacuum pump to evacuate the condenser, the pressure difference across the regulating valve can be flexibly expanded and precisely controlled, covering various pressure difference conditions that the valve may encounter.

[0019] 3.3 Adjustable back pressure: An electric regulating valve is installed after the regulating valve to actively simulate and adjust the valve outlet back pressure, and to evaluate the valve's working characteristics under different back pressures.

[0020] (4) This invention improves the automation and reliability of the testing system: 4.1 Integrated filtration and monitoring of the cooling system: The cooling water circuit is equipped with a water filter and an electromagnetic flow meter, which not only ensures the cleanliness of the cooling water but also enables real-time flow monitoring, ensuring the long-term stable and efficient operation of the condenser.

[0021] 4.2 Intelligent Vacuum and Liquid Level Regulation: The vacuum level is regulated by a shut-off valve, and the condenser liquid level is controlled by a linkage between the water supply tank, condensate pump, and three-way valve, thus achieving automatic stabilization of key operating parameters.

[0022] 4.3 Equipped with multiple safety protections: The system is equipped with safety valves at key locations such as steam pipelines and compressed air storage tanks to effectively prevent overpressure risks and ensure test safety.

[0023] (5) This invention supports unattended and remote testing: The data acquisition system, consisting of sensors, isolators, data acquisition units, and industrial control computers, enables remote, real-time, and high-precision acquisition and storage of all test parameters, facilitating data analysis and fault diagnosis, and laying the foundation for the automation and unattended operation of the test process.

[0024] II. Regarding experimental methods and application value: (1) A standardized and reproducible testing process has been formed: The method proposed in this invention has clear steps and controllable operation, transforming the complex valve hot test into a standardized procedure, which significantly improves the consistency and comparability of test results and provides a scientific basis for valve performance evaluation.

[0025] (2) It greatly supports the research and development and certification of domestically produced valves: This system and method can comprehensively and rigorously assess the performance and lifespan of domestically produced alternative valves, break through the technical barriers of foreign manufacturers in the testing and verification process, accelerate the process of domestically produced valves from design finalization to engineering application, and have strategic significance for ensuring the supply chain security and independent control of my country's key energy equipment.

[0026] (3) Possesses good economic efficiency and scalability: 3.1 One system with multiple uses: The same system can serve the research and development, testing, factory testing, acceptance evaluation and fault reproduction of different models and specifications of bypass valves, with high equipment utilization.

[0027] 3.2 Shorten the R&D cycle: By simulating extreme working conditions in the factory, potential problems can be exposed in advance, reducing on-site debugging time and risks, and lowering the total life cycle cost.

[0028] In summary, this invention not only provides a fully functional, safe, and reliable hot-state testing system, but also a scientific and efficient testing method. It fundamentally solves the "last mile" reliability verification problem of steam turbine bypass regulating valves from "laboratory verification" to "practical engineering application," and has important practical value for promoting the localization of high-end valves and the technological progress of power equipment in my country. Attached Figure Description

[0029] Figure 1 This is a system structure diagram of the present invention.

[0030] Figure 2 This is a partial schematic diagram (a) of the present invention.

[0031] Figure 3 This is a partial schematic diagram (II) of the present invention.

[0032] Figure 4 This is a partial schematic diagram (III) of the present invention.

[0033] Figure 5 This is a diagram of the compressed air system of the present invention.

[0034] Figure 6 This is a diagram of the data acquisition system of the present invention.

[0035] The following components are included: 1. Boiler; 2. Main gate valve; 3. Desuperheating and pressure reducing device; 4. Steam pipeline safety valve; 5. Large-diameter electric gate valve; 6. Large-diameter flow orifice plate; 7. Small-diameter electric gate valve; 8. Small-diameter flow orifice plate; 9. Pneumatic sleeve regulating valve; 10. Electro-hydraulic quick-opening valve; 11. Electric regulating valve; 12. Vacuum condenser; 13. No. 1 condensate pump; 14. No. 1 check valve; 15. No. 1 stop valve; 16. Three-way valve; 17. No. 2 stop valve; 18. No. 2 check valve; 19. No. 3 stop valve; 20. Gate valve; 21. Water ring vacuum pump; 2. No. 4 gate valve; 23. No. 5 gate valve; 24. No. 1 butterfly valve; 25. Water filter; 26. Electromagnetic flow meter; 27. No. 2 butterfly valve; 28. Makeup water tank; 29. ​​No. 6 gate valve; 30. Condensate tank; 31. No. 2 condensate pump; 32. Low-pressure heater; 33. Deaerator; 34. Feed water pump; 35. High-pressure heater; 36. Compressed air safety valve; 37. Air storage tank; 38. No. 7 gate valve; 39. Ball valve; 40. Pressure reducing valve; 41. Valve positioner; 42. Steady-state isolator; 43. Steady-state data acquisition device; 44. Industrial control computer. Detailed Implementation

[0036] The specific embodiments of the present invention will now be described with reference to the accompanying drawings.

[0037] like Figures 1-6 As shown, the hot test system of the turbine bypass regulating valve in this embodiment includes a boiler 1. The outlet of the boiler 1 is connected in sequence to a main gate valve 2, a desuperheating and pressure reducing device 3, a pneumatic sleeve regulating valve 9, an electric regulating valve 11, a vacuum condenser 12, a condensate tank 30, a condensate pump, a low-pressure heater 32, a deaerator 33, a feedwater pump 34, and a high-pressure heater 35. The output end of the high-pressure heater 35 returns to the boiler 1, forming a steam closed loop. An electro-hydraulic quick-opening valve 10 is installed in parallel with the pneumatic sleeve regulating valve 9. The pneumatic sleeve regulating valve 9 and the electro-hydraulic quick-opening valve 10 are interlocked for control, which is used to realize the rapid regulation of the flow of the pneumatic sleeve regulating valve 9, while maintaining the stable steam flow of the boiler 1. The vacuum condenser 12 is connected to a cooling water system, which includes a first butterfly valve 24, a water filter 25 and an electromagnetic flow meter 26 connected in sequence, as well as a second butterfly valve 27 connected separately to the vacuum condenser 12. It also includes a water ring vacuum pump 21, whose pump port is connected to the vacuum condenser 12 via a pipe for evacuating the condenser. It also includes a compressed air system connected to the pneumatic sleeve regulating valve 9, which consists of an air storage tank 37, a pressure reducing valve 40 and a valve positioner 41 connected in series, and is used to control the opening and closing of the pneumatic sleeve regulating valve 9. It also includes a data acquisition system, which consists of sensors, a steady-state isolator 42, a steady-state data acquisition unit 43, and an industrial control computer 44, used to realize the remote transmission and acquisition of test parameters.

[0038] A large-diameter electric gate valve 5 and a large-diameter flow orifice plate 6 are installed in series on the pipeline between the steam pipeline safety valve 4 and the pneumatic sleeve regulating valve 9. A small-diameter electric gate valve 7 and a small-diameter flow orifice plate 8 are arranged in parallel on the large-diameter electric gate valve 5 and the large-diameter flow orifice plate 6.

[0039] Cooling water from the vacuum condenser 12 enters the vacuum condenser 12 through butterfly valve 24, water filter 25 and electromagnetic flow meter 26, and then exits through butterfly valve 27.

[0040] The suction port of the water ring vacuum pump 21 is equipped with two shut-off valves.

[0041] The liquid level of the vacuum condenser 12 is replenished by the water supply tank 28, and a No. 6 shut-off valve 29 is installed on the water supply pipeline between the water supply tank 28 and the vacuum condenser 12.

[0042] The liquid level in the vacuum condenser 12 is regulated by a condensate pump, a check valve, a shut-off valve, and a three-way valve 16 to ensure a stable liquid level.

[0043] The compressed air system also includes a compressed air safety valve 36 installed on the air tank 37.

[0044] A steam pipeline safety valve 4 is installed at the output end of the desuperheating and pressure reducing device 3.

[0045] An electric regulating valve 11 is installed between the pneumatic sleeve regulating valve 9 and the vacuum condenser 12.

[0046] The specific structure and function of the hot test system for a steam turbine bypass regulating valve described in this invention are as follows: The main components include boiler 1, which is connected to a main gate valve 2, a desuperheating and pressure reducing device 3, a steam pipeline safety valve 4, a large-diameter electric gate valve 5, a large-diameter flow orifice plate 6, a small-diameter electric gate valve 7, a small-diameter flow orifice plate 8, a pneumatic sleeve regulating valve 9, an electro-hydraulic quick-opening valve 10, an electric regulating valve 11, a vacuum condenser 12, a No. 1 condensate pump 13, a No. 1 check valve 14, a No. 1 shut-off valve 15, a three-way valve 16, a No. 2 shut-off valve 17, a No. 2 check valve 18, a No. 3 shut-off valve 19, a condensate tank 30, a No. 2 condensate pump 31, a low-pressure heater 32, a deaerator 33, a feedwater pump 34, and a high-pressure heater 35. The high-pressure heater 35 is finally connected back to boiler 1, forming a closed-loop working circuit.

[0047] The high-temperature, high-pressure steam generated by boiler 1 is regulated to the steam parameters required by the pneumatic sleeve regulating valve after passing through the desuperheating and pressure-reducing device 3. Meanwhile, a large-diameter flow orifice plate 6 and a small-diameter flow orifice plate 8 are installed in the steam pipeline to meet the steam flow measurement requirements of the regulating valve under different flow conditions. Additionally, a steam pipeline safety valve 4 is installed on the pipeline to prevent overpressure operation.

[0048] When the pneumatic sleeve regulating valve 9 needs to undergo a rapid flow change test, the electro-hydraulic quick-opening valve 10 and the pneumatic sleeve regulating valve 9 are interlocked to achieve a rapid change in the flow of the pneumatic sleeve regulating valve 9, while ensuring that the steam flow of boiler 1 is basically stable, thus avoiding the defect that the steam flow of boiler 1 cannot change rapidly.

[0049] The electro-hydraulic quick-opening valve 10 and the pneumatic sleeve regulating valve 9 are arranged in parallel. Through interlocking, the flow rate of the pneumatic sleeve regulating valve 9 can be rapidly changed, while ensuring that the steam flow rate of boiler 1 remains relatively stable. The steam passing through the pneumatic sleeve regulating valve 9 and the electro-hydraulic quick-opening valve 10 first passes through the electric regulating valve 11, and then enters the vacuum condenser 12 for cooling. After being cooled into condensate, it passes through the No. 1 condensate pump 13, the No. 1 shut-off valve 15, the three-way valve 16, the No. 2 check valve 18, the No. 3 shut-off valve 19, the condensate tank 30, the No. 2 condensate pump 31, the low-pressure heater 32, the deaerator 33, the feedwater pump 34, the high-pressure heater 35, and finally enters boiler 1. This achieves the recycling of the test working fluid. At the same time, the electric regulating valve 11 can adjust the back pressure of the pneumatic sleeve regulating valve 9.

[0050] The cooling water for the vacuum condenser 12 enters the condenser through butterfly valve 24, water filter 25, and electromagnetic flow meter 26, and then exits through butterfly valve 27. The cooling water system of the vacuum condenser 12 cools steam into condensate, and at the same time, it filters impurities in the cooling water and monitors the flow rate.

[0051] The water ring vacuum pump 21 operates by supplying cooling water through gate valve 20. The pump port of the water ring vacuum pump 21 is connected to the vacuum condenser 12 via a fourth shut-off valve 22 and a pipeline, thereby achieving vacuuming of the condenser and efficient cooling. This also expands the pressure difference across the pneumatic sleeve regulator 9. The vacuum level of the water ring vacuum pump 21 is regulated by a fifth shut-off valve 23.

[0052] Specifically, the cooling water header supplies the cooling water required for the operation of the water ring vacuum pump 21 via gate valve 20. The suction port of the water ring vacuum pump 21 is connected to the condenser via shut-off valve 22 and piping, thereby achieving vacuuming of the condenser. The vacuum level of the water ring vacuum pump 21 is adjusted by the opening of shut-off valve 23. The condenser vacuuming system ensures the vacuum level of the condenser.

[0053] The liquid level in the vacuum condenser 12 is replenished through the water tank 28, the third shut-off valve 19, and the pipeline. The condensate from the vacuum condenser 12 flows through the first condensate pump 13, the first check valve 14, and the first shut-off valve 15 to the three-way valve 16. The three-way valve 16 determines the condensate flow ratio through the second shut-off valve 17 and the second check valve 18 based on the liquid level in the vacuum condenser 12 to ensure a stable liquid level.

[0054] The compressed air supply to the pneumatic sleeve regulating valve 9 passes through the air tank 37, the No. 7 shut-off valve 38, the ball valve 39, and the pressure reducing valve 40, and then connects to the valve positioner 41 to control the valve's opening and closing. The compressed air safety valve 36 prevents overpressure in the air tank 37. The compressed air system enables remote operation of the pneumatic sleeve regulating valve 9.

[0055] The measurement parameters of the test system are transmitted through sensors, then connected to a steady-state isolator 42 and a steady-state data acquisition unit 43, and finally connected to an industrial control computer 44 via a network cable. The data acquisition system enables remote transmission and acquisition of test data.

[0056] In actual work, it is completed through the following steps: Step 1: The vacuum condenser 12 is cooled by a cooling water system. The cooling water enters the condenser after being filtered by a water filter 25 and monitored by an electromagnetic flow meter 26. Step 2: Start the No. 1 condensate pump 13. The condensate flows through the No. 1 check valve 14 and the No. 1 shut-off valve 15 to the three-way valve 16. The three-way valve 16 determines the flow rate of condensate returning to the vacuum condenser 12 according to the liquid level in the vacuum condenser 12 to ensure a stable liquid level. Step 3: Start boiler 1 to generate high-temperature and high-pressure steam. The steam enters the test section after being regulated by desuperheating and pressure reducing device 3. Step 4: By interlocking the pneumatic sleeve regulating valve 9 and the parallel electro-hydraulic quick-opening valve 10, the flow rate of the regulating valve can be tested for step change, while maintaining the steam flow rate of boiler 1 basically stable. Step 5: Adjust the opening of the electric regulating valve 11 to change the back pressure of the pneumatic sleeve regulating valve 9 and simulate the valve performance under different working conditions; Step 6: Evacuate the vacuum condenser 12 using the water ring vacuum pump 21, adjust the pressure difference before and after the valve, and expand the test operating range; Step 7: The data acquisition system collects the pressure, temperature, flow rate, and opening degree signals before and after the valve in real time, and transmits them to the industrial control computer 44 for analysis and storage via the steady-state isolator 42 and steady-state acquisition device 43. Step 8: After the test is completed, gradually close all valves and equipment to stop the operation of boiler 1.

[0057] During the experiment, the vacuum level of the water ring vacuum pump 21 was controlled by adjusting the opening degree of the No. 5 shut-off valve 23, thereby precisely controlling the pressure difference across the pneumatic sleeve regulating valve 9.

[0058] During the test, the liquid level of the vacuum condenser 12 was adjusted by the water replenishment tank 28 and the No. 1 condensate pump 13 in conjunction with the three-way valve 16 to maintain a stable liquid level.

[0059] During the test, the action of the pneumatic sleeve regulating valve 9 is controlled by the compressed air system. After the compressed air is stabilized by the air tank 37 and adjusted by the pressure reducing valve 40, the valve opening is controlled by the valve positioner 41.

[0060] During the experiment, the steam flow rate at different flow stages was measured using a large-diameter flow orifice plate 6 and a small-diameter flow orifice plate 8.

[0061] The present invention has a complete system structure and clear operation method, which can realize unattended remote testing and is applicable to various scenarios such as valve research and development, acceptance and fault reproduction.

[0062] The above description is an explanation of the present invention and not a limitation thereof. The scope of the present invention is defined by the claims. Within the scope of protection of the present invention, any form of modification may be made.

Claims

1. A hot-state testing system for a steam turbine bypass regulating valve, characterized in that: The boiler (1) is connected in sequence to a main gate valve (2), a desuperheating and pressure reducing device (3), a pneumatic sleeve regulating valve (9), an electric regulating valve (11), a vacuum condenser (12), a condensate tank (30), a condensate pump, a low-pressure heater (32), a deaerator (33), a feed water pump (34), and a high-pressure heater (35) via pipelines. The output of the high-pressure heater (35) returns to the boiler (1), forming a steam closed loop. An electro-hydraulic quick-opening valve (10) is installed in parallel with the pneumatic sleeve regulating valve (9). The pneumatic sleeve regulating valve (9) and the electro-hydraulic quick-opening valve (10) are interlocked to achieve rapid adjustment of the flow rate of the pneumatic sleeve regulating valve (9) while maintaining a stable steam flow rate of the boiler (1). The vacuum condenser (12) is connected to a cooling water system, which includes a first butterfly valve (24), a water filter (25) and an electromagnetic flow meter (26) connected in sequence, as well as a second butterfly valve (27) connected separately to the vacuum condenser (12). It also includes a water ring vacuum pump (21), the pump port of which is connected to a vacuum condenser (12) via a pipe for evacuating the condenser; It also includes a compressed air system connected to the pneumatic sleeve regulating valve (9), which consists of an air tank (37), a pressure reducing valve (40) and a valve positioner (41) connected in series, and is used to control the opening and closing of the pneumatic sleeve regulating valve (9); It also includes a data acquisition system, which consists of a sensor, a steady-state isolator (42), a steady-state acquisition device (43), and an industrial control computer (44), used to realize the remote transmission and acquisition of test parameters.

2. The steam turbine bypass regulating valve hot test system as described in claim 1, characterized in that: A large-diameter electric gate valve (5) and a large-diameter flow orifice plate (6) are installed in series on the pipeline between the steam pipeline safety valve (4) and the pneumatic sleeve regulating valve (9). A small-diameter electric gate valve (7) and a small-diameter flow orifice plate (8) are arranged in parallel between the large-diameter electric gate valve (5) and the large-diameter flow orifice plate (6).

3. The steam turbine bypass regulating valve hot test system as described in claim 1, characterized in that: Cooling water from the vacuum condenser (12) enters the vacuum condenser (12) through the first butterfly valve (24), water filter (25) and electromagnetic flow meter (26), and is then discharged through the second butterfly valve (27).

4. The steam turbine bypass regulating valve hot test system as described in claim 1, characterized in that: The pump port of the water ring vacuum pump (21) is equipped with two shut-off valves.

5. The hot test system for the turbine bypass regulating valve as described in claim 1, characterized in that: The liquid level of the vacuum condenser (12) is replenished by the water tank (28).

6. The steam turbine bypass regulating valve hot test system as described in claim 1, characterized in that: The liquid level of the vacuum condenser (12) is regulated by the condensate pump, check valve, shut-off valve and three-way valve (16) to ensure a stable liquid level.

7. The steam turbine bypass regulating valve hot test system as described in claim 1, characterized in that: The compressed air system also includes a compressed air safety valve (36) installed on the air tank (37).

8. The hot test system for the turbine bypass regulating valve as described in claim 1, characterized in that: A steam pipeline safety valve (4) is installed at the output end of the de-heating and pressure reducing device (3).

9. The steam turbine bypass regulating valve hot test system as described in claim 1, characterized in that: An electric regulating valve (11) is installed between the pneumatic sleeve regulating valve (9) and the vacuum condenser (12).

10. A test method for a hot-state test system for a steam turbine bypass regulating valve as described in claim 1, characterized in that: The following steps are included: Step 1: The vacuum condenser (12) is cooled by a cooling water system. The cooling water is filtered by a water filter (25) and monitored by an electromagnetic flow meter (26) before entering the condenser. Step 2: Start the No. 1 condensate pump (13). The condensate flows through the No. 1 check valve (14) and the No. 1 shut-off valve (15) to the three-way valve (16). The three-way valve (16) determines the ratio of condensate flow through the No. 2 shut-off valve (17) and the No. 2 check valve (18) according to the liquid level of the vacuum condenser (12) to ensure the stability of the liquid level. Step 3: Start the boiler (1) to generate high temperature and high pressure steam. The steam enters the test section after being regulated by the de-heating and pressure reducing device (3). Step 4: By interlocking the pneumatic sleeve regulating valve (9) and the parallel electro-hydraulic quick-opening valve (10), the flow rate of the regulating valve is tested for step change, while the steam flow rate of the boiler (1) is kept basically stable. Step 5: Adjust the opening of the electric regulating valve (11) to change the back pressure of the pneumatic sleeve regulating valve (9) and simulate the valve performance under different working conditions; Step 6: Use a water ring vacuum pump (21) to evacuate the vacuum condenser (12), adjust the pressure difference before and after the valve, and expand the test operating range; Step 7: Real-time acquisition of pressure, temperature, flow rate, and opening degree signals before and after the valve through the data acquisition system, and transmission to the industrial control computer (44) via the steady-state isolator (42) and steady-state acquisition device (43) for analysis and storage; Step 8: After the test is completed, gradually close all valves and equipment and stop the operation of boiler (1).

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