High temperature valve testing system

Abstract

The present disclosure relates to a high-temperature valve testing system, comprising: a steam generator configured to be capable of generating saturated steam and controlling the saturated steam to be output at a first preset pressure and a first preset temperature; a superheater, an inlet of the superheater being communicated with an outlet of the steam generator, the superheater being configured to be capable of receiving the saturated steam and controlling the saturated steam to be output at a second preset temperature; a testing unit, comprising a testing pipeline, an inlet of the testing pipeline being communicated with an outlet of the superheater, the testing pipeline being provided with a mounting position for mounting a valve to be tested, a temperature control assembly for adjusting a temperature of the testing pipeline, and a pressure control assembly for adjusting a pressure of the testing pipeline; and a controller, the controller being signal-connected with the steam generator, the superheater, the temperature control assembly, the pressure control assembly, and the valve to be tested, respectively. In this way, the valve to be tested can be tested at different temperatures and different pressures, the testing is more accurate and closer to the actual working state of the valve, and the testing result is reliable.

Description

Technical Field

[0001] This disclosure relates to the field of valve testing technology, and more specifically, to a high-temperature valve testing system. Background Technology

[0002] In related technologies, high-temperature valves are typically defined as operating temperatures above 425°C. Testing is primarily conducted through computer simulations. However, this method has significant errors and cannot accurately measure various valve performance characteristics, including but not limited to hysteresis, dead zone, full stroke, full stroke duration, starting pressure, packing leakage, and valve sticking. Therefore, there is an urgent need for a reliable testing system capable of testing high-temperature valves under actual temperature and pressure conditions. Summary of the Invention

[0003] The purpose of this disclosure is to provide a high-temperature valve testing system that can test high-temperature valves under actual temperature and pressure conditions, and can accurately and reliably test various performance characteristics of valves at high temperatures, thereby at least partially solving the problems in related technologies.

[0004] To achieve the above objectives, this disclosure provides a high-temperature valve testing system, comprising: a steam generator configured to generate saturated steam and control the saturated steam output at a first preset pressure and a first preset temperature; a superheater, the inlet of which is connected to the outlet of the steam generator, the superheater being configured to receive saturated steam and control the saturated steam to be heated to a second preset temperature for output; a test pipeline, the inlet of which is connected to the outlet of the superheater, the test pipeline being provided with a mounting position for installing a valve under test, a temperature control component for adjusting the temperature of steam entering the valve under test, and a pressure control component for adjusting the pressure of steam entering the valve under test; and a controller, the controller being signal-connected to the steam generator, the superheater, the temperature control component, the pressure control component, and the valve under test.

[0005] Optionally, the temperature control assembly includes a first temperature sensor, a second temperature sensor, and a first control valve. One of the first and second temperature sensors is located upstream of the mounting position, and the other is located downstream of the mounting position. The first control valve is located upstream of the mounting position. The first temperature sensor, the second temperature sensor, and the first control valve are all signal-connected to the controller so that the controller can adjust the valve opening of the first control valve according to the data from the first and second temperature sensors to control the steam flow rate entering the mounting position.

[0006] Optionally, the temperature control component further includes a third temperature sensor and a fourth temperature sensor, one of which is located at the inlet of the test pipeline and the other at the outlet of the test pipeline. Both the third and fourth temperature sensors are signal-connected to the controller so that the controller can adjust the temperature of the steam entering the test pipeline based on the third and fourth temperature sensors.

[0007] Optionally, the pressure control assembly includes a first pressure sensor and a second control valve. Both the first pressure sensor and the second control valve are located at the outlet of the valve under test, and the first pressure sensor is located downstream of the second control valve. Both the first pressure sensor and the second control valve are signal-connected to the controller. The controller controls the valve opening of the second control valve based on the data from the first pressure sensor to control the steam pressure entering the valve under test.

[0008] Optionally, the pressure control assembly further includes a second pressure sensor and a third control valve. The second pressure sensor is located at the inlet of the test pipeline, and the third control valve is located at the outlet of the test pipeline. Both the second pressure sensor and the third control valve are signal-connected to the controller so that the controller adjusts the valve opening of the third control valve according to the data from the first pressure sensor to control the steam pressure entering the test pipeline.

[0009] Optionally, there are multiple test pipelines, and the multiple test pipelines are arranged in parallel, with the inlet of each test pipeline connected to the outlet of the superheater.

[0010] Optionally, the number of test pipelines is three, including a first test pipeline, a second test pipeline, and a third test pipeline arranged in parallel. The test system also includes an inlet pipeline and an outlet pipeline. The inlet of the inlet pipeline is connected to the outlet of the superheater, and the inlets of the first, second, and third test pipelines are all connected to the outlet of the inlet pipeline; the outlets of the first, second, and third test pipelines are all connected to the inlet of the outlet pipeline. The temperature control component includes a third temperature sensor and a fourth temperature sensor, with the third temperature sensor located in the inlet pipeline and the fourth temperature sensor located in the outlet pipeline. The pressure control component also includes a first pressure sensor, a second pressure sensor, and a third control valve, with the second pressure sensor located in the inlet pipeline, the first pressure sensor, and the third control valve located in the outlet pipeline, and the third control valve located downstream of the first pressure sensor.

[0011] Optionally, the testing system further includes a silencer located at the outlet of the air outlet pipe, with the distance between the silencer and the ground being greater than eight meters; and / or a drain valve is provided on the air outlet pipe, with the drain valve located at the lowest point of the air outlet pipe.

[0012] Optionally, the steam generator includes a level gauge for measuring the liquid level in the water tank of the steam generator. The level gauge is signal-connected to the controller, which is used to replenish water to the steam generator based on the liquid level data from the level gauge; and / or The steam generator also includes a water supply pipe and a filter installed on the water supply pipe. The water supply pipe is connected to the water tank of the steam generator, and the filter is used to filter the water entering the steam generator.

[0013] Optionally, a pressure tap is provided on the test pipeline downstream of the valve under test, and a leakage meter is connected to the pressure tap. The leakage meter is used to measure the leakage of the valve under test when the controller controls the valve under test to close.

[0014] Optionally, the second preset temperature is not higher than 600°C.

[0015] The above technical solution provides saturated steam via a steam generator, which then introduces it into a superheater at a first preset pressure and temperature. The superheater accepts the saturated steam and controls its temperature rise from the first preset temperature to a second preset temperature. The steam then enters the test pipeline to test the valve under test. A controller adjusts the temperature and pressure control components to allow the valve under test to undergo performance testing at different temperatures and pressures. This provides more accurate and realistic testing, closely mimicking the actual operating conditions of the valve, resulting in reliable test results. For example, the controller can control the valve under test under different temperature and pressure conditions, especially at high temperatures, to perform static tests such as feedback signals, basic errors, hysteresis, dead zones, rated stroke deviations, and start / end point deviations. It can also perform dynamic performance tests, such as detecting valve hysteresis time by examining changes in friction and the historical curves of output and feedback signals.

[0016] Other features and advantages of this disclosure will be described in detail in the following detailed description section. Attached Figure Description

[0017] The accompanying drawings are provided to further illustrate the present disclosure and form part of the specification. They are used together with the following detailed description to explain the present disclosure, but do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic flowchart of the high-temperature valve testing system provided in an exemplary embodiment of this disclosure; Figure 2 This is a flowchart illustrating the test unit provided in an exemplary embodiment of this disclosure.

[0018] Explanation of reference numerals in the attached figures 1-Steam generator; 11-Level gauge; 12-Water supply pipe; 13-Water tank; 14-Fifth temperature sensor; 15-Third pressure sensor; 16-Pressure regulator; 2-Filter; 3-Superheater; 31-Thermostat; 32-Fourth control valve; 33-Safety valve; 4-Test line; 41-First test line; 42-Second test line; 43-Third test line; 5-Valve under test; 6-Temperature control assembly; 61-First temperature sensor; 62-Second temperature sensor; 63-First control valve; 64-Third temperature sensor; 65-Fourth temperature sensor; 7-Pressure control assembly; 71-First pressure sensor; 72-Second control valve; 73-Second pressure sensor; 74-Third control valve; 8-Controller; 9-Inlet pipe; 10-Outlet pipe; 110-Silencer; 120-Drain valve; 130-Pressure tap; 140-Leakage meter. Detailed Implementation

[0019] The specific embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit this disclosure.

[0020] In this disclosure, unless otherwise stated, directional terms such as "inner" and "outer" refer to the outline of the part itself. Furthermore, it should be noted that terms such as "first" and "second" are used to distinguish one element from another and do not indicate sequence or importance. Additionally, in the description with reference to the accompanying drawings, the same reference numerals in different drawings denote the same element.

[0021] In related technologies, the dynamic and static performance of valves at room temperature can be directly tested. For high-temperature valves, which are typically defined as operating temperatures above 425°C, performance testing is required before the valve leaves the factory. Various valve performance parameters include, but are not limited to, hysteresis, dead zone, full stroke, full stroke action time, starting pressure, packing leakage, and whether the valve action is jammed. Currently, computer simulation is commonly used for simulation testing. However, the above-mentioned simulation method has performance testing biases, resulting in inaccurate valve performance testing.

[0022] To solve the above technical problems, such as Figure 1 and Figure 2As shown, this disclosure provides a high-temperature valve testing system, including: a steam generator 1, a superheater 3, a test pipeline 4, a valve under test 5, a temperature control component 6, a pressure control component 7, and a controller 8. The steam generator 1 is configured to generate saturated steam and control the output of the saturated steam at a first preset pressure and a first preset temperature. The inlet of the superheater 3 is connected to the outlet of the steam generator 1, and the superheater 3 is configured to receive saturated steam and control the saturated steam to heat up to a second preset temperature. The inlet of the test pipeline 4 is connected to the outlet of the superheater 3. The valve under test 5, the temperature control component 6, and the pressure control component 7 are all located on the test pipeline 4, with the valve under test 5 located at the mounting position on the test pipeline 4. The temperature control component 6 is used to adjust the steam temperature entering the valve under test 5, and the pressure control component 7 is used to adjust the steam pressure entering the valve under test 5. The controller 8 is connected to the steam generator 1, the superheater 3, the temperature control component 6, the pressure control component 7, and the valve under test 5 via signals.

[0023] Through the above technical solution, saturated steam is provided by steam generator 1 and enters superheater 3 at a first preset pressure and a first preset temperature. Superheater 3 can accept saturated steam and control the saturated steam to rise from the first preset temperature to a second preset temperature. Then, it enters test pipeline 4 to test valve 5. Controller 8 adjusts temperature control component 6 and pressure control component 7 so that valve 5 can be tested under different temperatures and pressures. This allows for more accurate and closer dynamic and static testing of the valve's actual working state. Because this solution tests in a manner close to the valve's actual working environment, the test results are reliable, improving the quality of the performance test of valve 5. For example, controller 8 can control valve 5 under different temperatures and pressures, especially high temperatures, to perform static tests such as feedback signals, basic errors, hysteresis, dead zone, rated stroke deviation, and start / end point deviation. Dynamic performance tests can also be performed, such as testing valve hysteresis time by detecting changes in friction and the historical curves of output and feedback signals.

[0024] It should be noted that the steam generator 1 heats the water tank, and the first preset pressure and first preset temperature can be set according to specific working conditions. For example, in this embodiment, the steam generator 1 can heat water at room temperature to the first preset temperature of saturated steam of 200°C and the first preset pressure of 20 bar. The superheater 3 continues to heat the saturated steam to the second preset temperature, which can also be set according to specific working conditions. For example, in this embodiment, the second preset temperature can be no higher than 600°C. In addition, in order to improve the safety of the test pipeline 4, a shut-off valve is also provided on the test pipeline 4. The shut-off valve can be a solenoid valve or a manual valve. The shut-off valve is normally open. When it is necessary to shut off the test pipeline 4 in an emergency, the test pipeline 4 can be switched on or off by closing the shut-off valve.

[0025] In some implementable embodiments, the steam generator 1 may include a water tank 13, on which a level gauge 11 is provided. The level gauge 11 can be a commonly used level gauge such as a capacitive level gauge, ultrasonic level gauge, or float level gauge. The level gauge 11 is used to measure the liquid level in the water tank of the steam generator 1. The level gauge 11 is signal-connected to a controller 8, which is used to replenish water to the steam generator 1 based on the liquid level data from the level gauge 11. In some implementable embodiments, the steam generator 1 also includes a water supply pipe 12 and a filter 2 installed on the water supply pipe 12. The water supply pipe 12 is connected to the water supply pipe of the steam generator 1. The tank 13 is connected, and a switch valve can be installed on the water supply pipe 12. The switch valve can be a solenoid valve and is connected to the controller 8 via signal. The filter 2 is used to filter the water source entering the steam generator 1. When the water level of the tank 13 obtained by the level gauge 11 drops to the water supply position, the controller 8 opens the switch valve on the water supply pipe 12 to supply water to the tank 13. When the water level in the tank 13 rises to the maximum water storage position, the controller 8 closes the switch valve on the water supply pipe 12. Thus, since both the level gauge 11 and the switch valve are connected to the controller 8 via signal, automatic water supply to the water tank 13 of the steam generator 1 can be achieved.

[0026] In some feasible embodiments, the temperature control assembly 6 may include a first temperature sensor 61, a second temperature sensor 62, and a first control valve 63. One of the first temperature sensor 61 and the second temperature sensor 62 is located upstream of the mounting position, and the other is located downstream of the mounting position. The first control valve 63 is located upstream of the mounting position and may be a throttling valve. For example, the first temperature sensor 61 is located upstream of the mounting position and can measure the inlet temperature of the valve under test 5. The second temperature sensor 62 is located downstream of the mounting position and can measure the outlet temperature of the valve under test 5. The operating temperature inside the valve under test 5 is obtained through the measurements of the first temperature sensor 61 and the second temperature sensor 62. When the operating temperature deviates from the preset temperature, the controller 8 can control the throttling area of ​​the first control valve 63 to control the steam flow rate entering the valve under test 5, thereby adjusting the steam temperature entering the valve under test 5, so that the valve under test 5 can be tested under different temperature conditions.

[0027] It is understood that the first temperature sensor 61 and the second temperature sensor 62 mentioned above can both be installed inside the valve 5 to be tested, and the first temperature sensor 61 can be located at the inlet of the valve 5 to be tested, and the second temperature sensor 62 can be located at the outlet of the valve 5 to be tested.

[0028] Of course, in some feasible ways, the steam temperature inside the valve 5 under test can be measured by using the first temperature sensor 61 alone, or by using the second temperature sensor 62 alone.

[0029] In some feasible implementations, to facilitate the adjustment of the steam temperature within the test pipeline 4, the temperature control assembly 6 further includes a third temperature sensor 64 and a fourth temperature sensor 65. One of the third temperature sensor 64 and the fourth temperature sensor 65 is located at the inlet of the test pipeline 4, and the other is located at the outlet of the test pipeline 4. Both the third temperature sensor 64 and the fourth temperature sensor 65 are signal-connected to the controller 8. For example, with the third temperature sensor 64 located at the inlet of the test pipeline 4 and the fourth temperature sensor 65 located at the outlet of the test pipeline 4, the steam temperature within the test pipeline 4 can be obtained. When it is necessary to adjust the overall temperature of the test pipeline 4, the controller 8 can selectively adjust the steam temperature of the steam generator 1 and / or the superheater 3 based on the data from the third temperature sensor 64 and the fourth temperature sensor 65 to adjust the steam temperature entering the test pipeline 4. At this time, in conjunction with the first temperature sensor 61, the second temperature sensor 62, and the first control valve 63, the temperature of the steam entering the valve under test 5 within the test pipeline 4 is adjusted, so that the valve under test 5 can be tested under various different temperature conditions.

[0030] In some feasible embodiments, to facilitate testing of the valve under test 5 under preset pressure conditions, the pressure control assembly 7 includes a first pressure sensor 71 and a second control valve 72. Both the first pressure sensor 71 and the second control valve 72 are located at the outlet of the valve under test 5, and the first pressure sensor 71 is located downstream of the second control valve 72. The second control valve 72 is an electromagnetic throttle valve. Both the first pressure sensor 71 and the second control valve 72 are connected to the controller 8 via signals. The controller 8 controls the valve opening of the second control valve 72 based on the data from the first pressure sensor 71 to control the steam pressure entering the valve under test 5.

[0031] In some feasible embodiments, to facilitate the adjustment of the steam pressure in the test pipeline 4, the pressure control assembly 7 also includes a second pressure sensor 73 and a third control valve 74. The second pressure sensor 73 is located at the inlet of the test pipeline 4, and the third control valve 74 is located at the outlet of the test pipeline 4. The third control valve 74 can be an electromagnetic throttle valve. Both the second pressure sensor 73 and the third control valve 74 are signal-connected to the controller 8. The controller 8 adjusts the valve opening of the third control valve 74 according to the data from the first pressure sensor 71 to control the steam pressure in the test pipeline 4. At the same time, the controller adjusts the second control valve 72 according to the data from the first pressure sensor 71 to adjust the steam pressure in the test pipeline 4, so that the valve under test 5 can be tested under various different pressure conditions.

[0032] In some feasible methods, there are multiple test lines 4, and the multiple test lines 4 are connected in parallel. The inlet of each test line 4 is connected to the outlet of the superheater 3, so that multiple valves 5 under test can be tested simultaneously by setting up multiple test lines 4, thereby improving the testing efficiency.

[0033] Specifically, there are three test lines 4, including a first test line 41, a second test line 42, and a third test line 43 connected in parallel. The first test line 41 is equipped with a first control valve 63, a first temperature sensor 61, a valve under test 5, a second temperature sensor 62, and a second control valve 72, arranged sequentially from inlet to outlet. Similarly, the control valves and temperature sensors in the second and third test lines 42 and 43 have the same structure as those in the first test line 41. In addition, the test system includes an inlet line 9 and an outlet line 10. The inlet of the inlet line 9 is connected to the outlet of the superheater 3, and the inlets of the first, second, and third test lines 41, 42, and 43 are all connected to the outlet of the inlet line 9. For example, a four-way valve can be installed on the inlet line 9. Each outlet is connected to the first test pipeline 41, the second test pipeline 42, and the third test pipeline 43, respectively. Similarly, a four-way valve can be provided at the inlet of the exhaust pipeline 10, wherein the three outlets of the four-way valve connected to the exhaust pipeline 10 are connected to the outlets of the first test pipeline 41, the second test pipeline 42, and the third test pipeline 43, respectively. The temperature control component 6 includes a third temperature sensor 64 and a fourth temperature sensor 65. The third temperature sensor 64 is located in the intake pipeline 9, and the fourth temperature sensor 65 is located in the exhaust pipeline 10. The pressure control component 7 also includes a first pressure sensor 71, a second pressure sensor 73, and a third control valve 74. The second pressure sensor 73 is located in the intake pipeline 9, and the first pressure sensor 71 and the third control valve 74 are located in the exhaust pipeline 10. The third control valve 74 is located downstream of the first pressure sensor 71. In this way, three valves 5 to be tested can be tested simultaneously at preset temperatures and preset pressures. It can be understood that the three valves 5 to be tested located on the first test line 41, the second test line 42, and the third test line 43 can be tested at the same temperature and the same pressure, or the first test line 41, the second test line 42, and the third test line 43 can be tested at different temperatures and different pressures.

[0034] Optionally, the testing system also includes a silencer 110, which is located at the outlet of the exhaust pipe 10. The distance between the silencer 110 and the ground is greater than eight meters. Thus, the silencer 110 reduces the noise of steam exhaust and reduces noise pollution. In addition, a drain valve 120 is also provided on the exhaust pipe 10. The drain valve 120 is located at the lowest point of the exhaust pipe 10 and is a solenoid valve. The exhaust pipe 10 may have a U-shaped or V-shaped bend, and the drain valve 120 is located at the lowest point of the U-shaped or V-shaped bend. Because the exhaust pipe 10 is relatively long, steam will form water droplets as the temperature decreases and accumulate at the lowest point of the exhaust pipe 10. The drain valve 120 is opened by the controller 8 to drain the accumulated water.

[0035] To facilitate the measurement of the airtightness of the valve under test 5 in its closed state under high temperature conditions, in some feasible embodiments, a pressure tap 130 is provided on the test pipeline 4 and downstream of the valve under test 5. A leakage meter 140 is connected to the pressure tap 130. The leakage meter 140 is used to measure the leakage of the valve under test 5 when the controller 8 controls the valve under test 5 to close.

[0036] It is understandable that the steam generator 1, superheater 3, and test pipeline 4 are connected by pipes, and insulation layers, such as thermal insulation cotton, can be installed on the pipes. This can reduce the temperature drop during the steam flow process.

[0037] It is understood that the aforementioned controller 8 may include a PLC controller and a touch screen. The touch screen can input preset test temperatures and test pressures for the valve 5 under test. The touch screen also has a display area for displaying real-time data from various sensors and test data from the valve 5 under test. Furthermore, the aforementioned controller 8 can be connected to the steam generator 1, superheater 3, valve 5 under test, temperature control component 6, and pressure control component 7 via wired or wireless means. The wireless means may include any one of WIFI, Bluetooth, 4G, or 5G.

[0038] The preferred embodiments of this disclosure have been described in detail above with reference to the accompanying drawings. However, this disclosure is not limited to the specific details of the above embodiments. Within the scope of the technical concept of this disclosure, various simple modifications can be made to the technical solutions of this disclosure, and these simple modifications all fall within the protection scope of this disclosure.

[0039] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, this disclosure will not describe the various possible combinations separately.

[0040] Furthermore, various different embodiments of this disclosure can be combined in any way, as long as they do not violate the spirit of this disclosure, they should also be regarded as the content disclosed in this disclosure.

Claims

1. A high-temperature valve testing system, characterized in that, include: A steam generator configured to generate saturated steam and control the saturated steam to be output at a first preset pressure and a first preset temperature; A superheater, the inlet of which is connected to the outlet of the steam generator, is configured to receive saturated steam and control the saturated steam to be heated to a second preset temperature for output. A test pipeline, the inlet of which is connected to the outlet of the superheater, is provided with a mounting position for installing the valve under test, a temperature control component for adjusting the temperature of the steam entering the valve under test, and a pressure control component for adjusting the pressure of the steam entering the valve under test; and The controller is connected to the steam generator, the superheater, the temperature control component, the pressure control component, and the valve under test.

2. The high-temperature valve testing system according to claim 1, characterized in that, The temperature control assembly includes a first temperature sensor, a second temperature sensor, and a first control valve. One of the first and second temperature sensors is located upstream of the mounting position, and the other is located downstream of the mounting position. The first control valve is located upstream of the mounting position. The first temperature sensor, the second temperature sensor, and the first control valve are all signal-connected to the controller so that the controller can adjust the valve opening of the first control valve according to the data from the first and second temperature sensors to control the steam flow rate entering the valve under test.

3. The high-temperature valve testing system according to claim 2, characterized in that, The temperature control component further includes a third temperature sensor and a fourth temperature sensor, one of which is located at the inlet of the test pipeline and the other at the outlet of the test pipeline. Both the third and fourth temperature sensors are signal-connected to the controller so that the controller can adjust the temperature of the steam entering the test pipeline based on the third and fourth temperature sensors.

4. The high-temperature valve testing system according to claim 1, characterized in that, The pressure control assembly includes a first pressure sensor and a second control valve. Both the first pressure sensor and the second control valve are located at the outlet of the valve under test, and the first pressure sensor is located downstream of the second control valve. Both the first pressure sensor and the second control valve are signal-connected to the controller. The controller controls the valve opening of the second control valve based on the data from the first pressure sensor to control the steam pressure entering the valve under test.

5. The high-temperature valve testing system according to claim 4, characterized in that, The pressure control assembly further includes a second pressure sensor and a third control valve. The second pressure sensor is located at the inlet of the test pipeline, and the third control valve is located at the outlet of the test pipeline. Both the second pressure sensor and the third control valve are signal-connected to the controller so that the controller adjusts the valve opening of the third control valve according to the data from the first pressure sensor to control the steam pressure entering the test pipeline.

6. The high-temperature valve testing system according to claim 1, characterized in that, There are multiple test pipelines, and the multiple test pipelines are arranged in parallel. The inlet of each test pipeline is connected to the outlet of the superheater.

7. The high-temperature valve testing system according to claim 6, characterized in that, The test pipeline has three components, including a first test pipeline, a second test pipeline, and a third test pipeline connected in parallel. The test system also includes an inlet pipeline and an outlet pipeline. The inlet of the inlet pipeline is connected to the outlet of the superheater, and the inlets of the first test pipeline, the second test pipeline, and the third test pipeline are all connected to the outlet of the inlet pipeline. The outlets of the first test pipeline, the second test pipeline, and the third test pipeline are all connected to the inlet of the exhaust pipeline; The temperature control component includes a third temperature sensor and a fourth temperature sensor, wherein the third temperature sensor is located in the air inlet pipe and the fourth temperature sensor is located in the air outlet pipe; The pressure control assembly further includes a first pressure sensor, a second pressure sensor, and a third control valve. The second pressure sensor is located in the intake pipe, the first pressure sensor and the third control valve are located in the outlet pipe, and the third control valve is located downstream of the first pressure sensor.

8. The high-temperature valve testing system according to claim 7, characterized in that, The testing system also includes a silencer located at the outlet of the exhaust pipe, the silencer being at a distance greater than eight meters from the ground; and / or A drain valve is provided on the air outlet pipe, and the drain valve is located at the lowest point of the air outlet pipe.

9. The high-temperature valve testing system according to claim 1, characterized in that, The steam generator includes a level gauge for measuring the liquid level in the water tank of the steam generator. The level gauge is signal-connected to the controller, which is used to replenish water to the steam generator based on the liquid level data from the level gauge; and / or The steam generator also includes a water supply pipe and a filter installed on the water supply pipe. The water supply pipe is connected to the water tank of the steam generator, and the filter is used to filter the water entering the steam generator.

10. The high-temperature valve testing system according to claim 1, characterized in that, A pressure tap is provided on the test pipeline downstream of the valve under test. A leakage meter is connected to the pressure tap. The leakage meter is used to measure the leakage of the valve under test when the controller controls the valve under test to close.

11. The high-temperature valve testing system according to any one of claims 1-10, characterized in that, The second preset temperature is no higher than 600℃.

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