Steam safety valve detection device
By simulating high-temperature and high-pressure conditions using a steam safety valve testing device, the opening and reseating pressures of the steam safety valve are precisely adjusted, solving the safety risks caused by calibration deviations in existing technologies and improving the operating accuracy and reliability of the steam safety valve.
Patent Information
- Application Number
- CN202511769674.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-28
- Publication Date
- 2026-02-13
AI Technical Summary
Existing technologies cannot accurately verify the opening and reseating pressures of steam safety valves under high temperature and high pressure environments, leading to increased safety risks in systems such as nuclear power plants.
A steam safety valve detection device was designed. It connects to a steam delivery pipeline through a steam inlet and a vent, uses external steam to simulate actual working conditions, and combines a pressure gauge and a drain valve to accurately adjust the opening and reseating pressure of the steam safety valve.
It improves the operating accuracy and reliability of steam safety valves, reduces the risk of steam leakage, and ensures that the safety valves open and reseat at the set pressure in the event of a system failure.
Smart Images
Figure CN121521455A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of steam valve testing technology, and in particular to a steam safety valve testing device. Background Technology
[0002] In the event of a malfunction in the secondary steam system of a ship, in order to ensure the accurate opening and reseating of the steam safety valve to protect the safety of the steam system pipelines and downstream equipment, and to prevent steam leakage due to incomplete sealing of the steam safety valve after reseating, the steam safety valve must be tested before installation.
[0003] Conventional safety valve calibration platforms typically use room-temperature media such as compressed air, nitrogen, or water for testing. These operating conditions differ significantly from the high-temperature, high-pressure environment in which steam safety valves actually operate. Because the stiffness of metal springs decreases with increasing temperature, steam safety valves that pass calibration at room temperature may exhibit significant deviations in their opening and reseating pressures in high-temperature steam environments, and this error increases with higher operating temperatures. Such calibration deviations could lead to serious accidents in systems with extremely high safety requirements, such as nuclear power plants. Therefore, existing calibration methods cannot reproduce real-world temperature and media conditions, making it difficult to guarantee the operational accuracy and reliability of steam safety valves. Summary of the Invention
[0004] This application provides a steam safety valve testing device, which to some extent improves the technical problem in related technologies where the calibration method cannot reproduce the real temperature and medium conditions, making it difficult to guarantee the operating accuracy and reliability of the steam safety valve.
[0005] This application provides a steam safety valve detection device, comprising: The detection pipeline has a steam inlet and a vent, wherein the steam inlet is connected to a steam delivery pipeline to supply steam to the detection pipeline; A steam safety valve and a pressure gauge are provided, both of which are connected to the detection pipeline, with the pressure gauge located between the steam inlet and the steam safety valve. A condensate drain valve is installed in the detection pipeline, and the condensate drain valve is located between the steam safety valve and the drain port.
[0006] In some embodiments, the steam safety valve detection device further includes a pressure-reducing valve, which is disposed in the detection pipeline and located near the steam inlet.
[0007] In some embodiments, the steam safety valve detection device further includes a buffer tank connected to the detection pipeline, the buffer tank being located between the pressure relief valve and the pressure gauge.
[0008] In some embodiments, the steam safety valve has an inlet that is connected to the detection pipeline via an air inlet pipe, and the volume of the buffer tank is more than three times the volume of the air inlet pipe.
[0009] In some embodiments, the steam safety valve detection device further includes a thermometer connected to the detection pipeline and located between the pressure relief valve and the buffer tank.
[0010] In some embodiments, the steam safety valve detection device further includes a pressure gauge valve and a detection branch, one end of which is connected to the detection pipeline and the other end to the pressure gauge, and the pressure gauge valve is located in the detection branch.
[0011] In some embodiments, the steam safety valve detection device further includes an exhaust pipe, the steam safety valve having an outlet, and the exhaust pipe being connected to the outlet.
[0012] In some embodiments, the exhaust pipe includes a first exhaust section and a second exhaust section arranged at an angle, the first exhaust section being connected to the outlet, and the second exhaust section having an exhaust port that is downwardly oriented.
[0013] In some embodiments, the detection pipeline includes a first detection section, a second detection section, and a third detection section. The second detection section and the third detection section are respectively located on both sides of the first detection section. The steam safety valve and the pressure gauge are connected to the first detection section. The steam inlet is located in the second detection section. The drain valve and the drain port are located in the third detection section, with the drain port facing downwards.
[0014] In some embodiments, the steam delivery pipeline is connected to the second detection section via a flange.
[0015] In some implementations... The beneficial effects of this application are as follows: This application provides a steam safety valve testing device. The testing pipeline has a steam inlet and a vent. The steam inlet is connected to a steam delivery pipeline to allow steam to be supplied to the testing pipeline. Specifically, this steam safety valve testing device utilizes external steam for pre-installation debugging and testing of the steam safety valve. By simulating the temperature, pressure, and other parameters of the steam safety valve under actual operating conditions, the device precisely adjusts the valve's opening and reseating pressures. The steam safety valve is installed only after the debugging is complete. In this way, when a steam system malfunctions, the steam safety valve can open according to the set opening pressure and reduce steam leakage according to the set reseating pressure, thereby improving the valve's operational accuracy and reliability. Attached Figure Description
[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention.
[0017] Figure 1 A schematic diagram of the steam safety valve detection device is shown.
[0018] Explanation of reference numerals in the attached figures: 10-Detection device, 100-Detection pipeline, 110-First detection section, 111-Detection branch, 120-Second detection section, 121-Steam inlet, 130-Third detection section, 131-Relief port, 200-Steam safety valve, 300-Pressure gauge, 310-Pressure gauge valve, 400-Drainage relief valve, 500-Pressure replenishing valve, 600-Buffer tank, 700-Thermometer, 800-Exhaust pipe, 810-First exhaust section, 820-Second exhaust section, 821-Exhaust port, 20-Steam delivery pipeline. Detailed Implementation
[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.
[0020] It should be noted that all directional indications in the embodiments of the present invention are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.
[0021] In this invention, unless otherwise explicitly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.
[0022] Furthermore, in this invention, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, where there is no conflict, technical solutions from different embodiments can be combined with each other, and such combined technical solutions are also within the scope of protection claimed by this invention.
[0023] In the event of a malfunction in the secondary steam system of a ship, in order to ensure the accurate opening and reseating of the steam safety valve to protect the safety of the steam system pipelines and downstream equipment, and to prevent steam leakage due to incomplete sealing of the steam safety valve after reseating, the steam safety valve must be tested before installation.
[0024] Conventional safety valve calibration platforms typically use room-temperature media such as compressed air, nitrogen, or water for testing. These operating conditions differ significantly from the high-temperature, high-pressure environment in which steam safety valves actually operate. Because the stiffness of metal springs decreases with increasing temperature, steam safety valves that pass calibration at room temperature may exhibit significant deviations in their opening and reseating pressures in high-temperature steam environments, and this error increases with higher operating temperatures. Such calibration deviations could lead to serious accidents in systems with extremely high safety requirements, such as nuclear power plants. Therefore, existing calibration methods cannot reproduce real-world temperature and media conditions, making it difficult to guarantee the operational accuracy and reliability of steam safety valves.
[0025] To improve the above-mentioned technical problems to a certain extent, this application provides a steam safety valve detection device, which can improve the operating accuracy and reliability of steam safety valves.
[0026] The embodiments of this application are described below with reference to the accompanying drawings: Please see Figure 1 This application provides a steam safety valve detection device 10, including a detection pipeline 100, a steam safety valve 200, a pressure gauge 300, and a drain valve 400. The detection pipeline 100 has a steam inlet 121 and a drain port 131. The steam inlet 121 is connected to a steam delivery pipeline 20 to supply steam to the detection pipeline 100. The steam safety valve 200 and the pressure gauge 300 are both connected to the detection pipeline 100, with the pressure gauge 300 located between the steam inlet 121 and the steam safety valve 200. The drain valve 400 is disposed in the detection pipeline 100, located between the steam safety valve 200 and the drain port 131.
[0027] The detection pipeline 100 has a steam inlet 121, which is connected to the steam delivery pipeline 20 to supply steam to the detection pipeline 100. This allows the external steam to be used for pre-installation commissioning and inspection of the steam safety valve 200. The pressure gauge 300 can be a high-precision pressure gauge, used to measure the pressure in the commissioning system to facilitate the opening and reseating pressure adjustment of the safety valve.
[0028] The drain valve 400 is used to discharge condensate from the test pipeline 100 before commissioning and to regulate the system pressure. When the drain valve 400 is open, condensate and steam in the test pipeline 100 can be discharged from the drain port 131. When liquid water is present in the test pipeline 100, if high-temperature and high-pressure steam is suddenly introduced, the steam will instantly heat a large amount of water into steam, causing a rapid expansion in volume and generating a huge pressure shock wave. Therefore, before introducing steam for testing, the drain valve 400 must be opened first to completely drain the condensate accumulated in the test pipeline 100. Furthermore, during the testing process, if it is necessary to fine-tune and reduce the system pressure, the drain valve 400 can be slightly opened to release a small amount of steam, achieving more precise pressure control.
[0029] The steam safety valve testing device 10 provided in this application uses external steam to perform pre-installation debugging and inspection of the steam safety valve 200. By simulating the temperature, pressure, and other parameters of the steam safety valve 200 under actual operating conditions using external steam, the device precisely adjusts the opening and reseating pressures of the steam safety valve 200. The steam safety valve 200 is installed only after the debugging is completed. In this way, when a steam system malfunctions, the steam safety valve 200 can open according to the set opening pressure and reduce steam leakage according to the set reseating pressure, thereby improving the operating accuracy and reliability of the steam safety valve 200.
[0030] In some embodiments, the steam safety valve detection device 10 further includes a pressure-reducing valve 500, which is disposed in the detection pipeline 100 and located near the steam inlet 121. The pressure-reducing valve 500 is used to control the steam intake; by adjusting the opening of the pressure-reducing valve 500, the steam intake and the pressure of the entire commissioning system can be controlled.
[0031] In some embodiments, the steam safety valve detection device 10 further includes a buffer tank 600, which is connected to the detection pipeline 100 and located between the pressure-reducing valve 500 and the pressure gauge 300. The buffer tank 600 is used to stabilize the pressure of the entire commissioning system and prevent excessive pressure fluctuations in the pressure-reducing or depressurizing system from causing reading errors.
[0032] Specifically, the steam safety valve 200 has an inlet, which is connected to the detection line 100 via an air inlet pipe. The volume of the buffer tank 600 is more than three times the volume of the air inlet pipe. In this way, the amount of steam released when the steam safety valve 200 trips is only a small fraction of the total steam volume in the buffer tank 600, thus preventing drastic pressure changes and ensuring stable system pressure during the valve's tripping and reseating processes, facilitating accurate readings from the pressure gauge 300.
[0033] In some embodiments, the steam safety valve testing device 10 further includes a thermometer 700, which is connected to the testing pipeline 100 and located between the pressure-reducing valve 500 and the buffer tank 600. The thermometer 700 is used to measure the temperature throughout the testing system to ensure that the medium introduced into the pipeline is genuine high-temperature steam, thereby simulating real operating conditions. Furthermore, the safety valve's set pressure refers to the pressure value at its operating temperature; therefore, the setting of the thermometer 700 provides a temperature background from the pressure gauge reading, confirming whether the safety valve's opening or reseating pressure occurs at the correct temperature, thus ensuring the accuracy and reliability of the calibration results.
[0034] In some embodiments, the steam safety valve detection device 10 further includes a pressure gauge valve 310 and a detection branch 111. One end of the detection branch 111 is connected to the detection pipeline 100, and the other end is connected to the pressure gauge 300. The pressure gauge valve 310 is located in the detection branch 111. When it is necessary to replace or remove the pressure gauge 300, the pressure gauge valve 310 is closed, allowing the pressure gauge 300 to be safely removed while the system is under pressure, thus improving operational safety and convenience.
[0035] In some embodiments, the steam safety valve detection device 10 further includes an exhaust pipe 800. The steam safety valve 200 has an outlet, and the exhaust pipe 800 is connected to the outlet. When the steam safety valve 200 trips, it discharges high-temperature, high-pressure, and high-speed steam. The exhaust pipe 800 can guide this jet to a pre-designed, safe area to ensure the safety of the operators. Furthermore, after the steam safety valve 200 trips, steam is discharged from the exhaust pipe 800, allowing observation of the sealing condition of the steam safety valve 200 after it reseats, i.e., whether there is steam leakage.
[0036] In some embodiments, the exhaust pipe 800 includes a first exhaust section 810 and a second exhaust section 820 arranged at an angle. The first exhaust section 810 is connected to an outlet, and the second exhaust section 820 has an exhaust port 821 facing downwards, so that steam is discharged from the exhaust port 821. This allows dangerous high-temperature steam to be directed directly to the ground or a safe drainage ditch, preventing accidental personnel from being scalded by the jet stream.
[0037] In some embodiments, the detection pipeline 100 includes a first detection section 110, a second detection section 120, and a third detection section 130. The second detection section 120 and the third detection section 130 are respectively located on both sides of the first detection section. The steam safety valve 200 and the pressure gauge 300 are connected to the first detection section. The steam inlet 121 is located in the second detection section 120. The drain valve 400 and the drain port 131 are located in the third detection section 130. The drain port 131 is set downward to ensure that the water accumulated in the detection pipeline 100 is completely and smoothly discharged and will not accumulate at the bottom of the pipe or valve.
[0038] Specifically, the steam delivery pipeline 20 and the second detection section 120 can be connected via a flange.
[0039] Although preferred embodiments of the invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including both the preferred embodiments and all changes and modifications falling within the scope of the invention.
[0040] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.
Claims
1. A steam safety valve detection device, characterized in that, include: The detection pipeline has a steam inlet and a vent, wherein the steam inlet is connected to a steam delivery pipeline to supply steam to the detection pipeline; A steam safety valve and a pressure gauge are provided, both of which are connected to the detection pipeline, with the pressure gauge located between the steam inlet and the steam safety valve. A condensate drain valve is installed in the detection pipeline, and the condensate drain valve is located between the steam safety valve and the drain port.
2. The steam safety valve detection device according to claim 1, characterized in that, The steam safety valve detection device also includes a pressure-reducing valve, which is installed in the detection pipeline and located near the steam inlet.
3. The steam safety valve detection device according to claim 2, characterized in that, The steam safety valve detection device also includes a buffer tank, which is connected to the detection pipeline and is located between the pressure relief valve and the pressure gauge.
4. The steam safety valve detection device according to claim 3, characterized in that, The steam safety valve has an inlet, which is connected to the detection pipeline via an air inlet pipe, and the volume of the buffer tank is more than three times the volume of the air inlet pipe.
5. The steam safety valve detection device according to claim 3, characterized in that, The steam safety valve detection device also includes a thermometer, which is connected to the detection pipeline and is located between the pressure-reducing valve and the buffer tank.
6. The steam safety valve detection device according to any one of claims 1-5, characterized in that, The steam safety valve detection device also includes a pressure gauge valve and a detection branch. One end of the detection branch is connected to the detection pipeline, and the other end is connected to the pressure gauge. The pressure gauge valve is located in the detection branch.
7. The steam safety valve detection device according to claim 3, characterized in that, The steam safety valve detection device also includes an exhaust pipe, and the steam safety valve has an outlet, with the exhaust pipe connected to the outlet.
8. The steam safety valve detection device according to claim 5, characterized in that, The exhaust pipe includes a first exhaust section and a second exhaust section arranged at an angle. The first exhaust section is connected to the outlet, and the second exhaust section has an exhaust port that faces downwards.
9. The steam safety valve detection device according to any one of claims 1-5, characterized in that, The detection pipeline includes a first detection section, a second detection section, and a third detection section. The second detection section and the third detection section are respectively located on both sides of the first detection section. The steam safety valve and the pressure gauge are connected to the first detection section. The steam inlet is located in the second detection section. The drain valve and the drain port are located in the third detection section, with the drain port facing downwards.
10. The steam safety valve detection device according to claim 9, characterized in that, The steam delivery pipeline is connected to the second detection section via a flange.