Device and method for detecting rupture disk for low-temperature medium

Abstract

The invention discloses a rupture disk detection device and method for a low-temperature medium, and relates to the technical field of detection devices.The rupture disk detection device for the low-temperature medium comprises a test container, a liquid inlet assembly and a detection assembly. The test container comprises a shell, an inner cavity of the shell is a test cavity, an air outlet and a liquid inlet which are communicated with the test cavity are formed in the shell, and the air outlet is located on the upper side of the liquid inlet; the liquid inlet assembly comprises a liquid storage container and a liquid inlet valve, the liquid storage container is communicated with the test cavity through the liquid inlet, the liquid inlet valve is arranged on a pipeline between the liquid storage container and the test cavity, the pressure detector and the temperature detector are at least partially arranged in the test cavity, and the adjusting valve is arranged on a pipeline between the air outlet and the flow detector. And a pipeline connected between the regulating valve and the air outlet is provided with a test port. According to the technical scheme provided by the invention, the rupture disks of different specifications can be accurately detected under the working condition close to the actual use condition, and the detection quality and efficiency of the rupture disk fatigue load test are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of detection devices, and in particular to a bursting disc detection device for low-temperature media and a method thereof. Background Art

[0002] Bursting discs are one of the important safety accessories for pressure-bearing special equipment, and the safety performance of bursting discs must meet technical requirements. One of the technical indicators for the safety performance of bursting discs is to undergo fatigue load testing under certain technical conditions. The conditions for fatigue load testing under these certain technical conditions are mainly the two technical indicators of temperature and pressure. During the fatigue load test of bursting discs, in order to ensure the quality of the test, we need to ensure that the technical conditions for the test are highly consistent with the technical conditions for actual use, that is, the fluctuations in temperature and pressure must be consistent. The actual temperature and pressure conditions for the use of the disc are: In daily use, bursting discs are generally used in parallel with safety valves. When the equipment is over-pressurized, the safety valve will trip first. At this time, the parallel bursting disc will not trip, but the safety valve will trip. The low-temperature medium will flow through the bursting disc, and the temperature of the bursting disc will fluctuate, mainly showing a decrease first and then an increase. Before the safety valve trips, both the safety valve and the rupture disc come into contact with a gaseous medium at a low temperature. Based on field measurements and experience, the operating temperature is generally between -2°C (minus 2°C) and 5°C. The pressure drops from the vessel's operating pressure to 85% of the operating pressure (i.e., a pressure fluctuation of 100% to 85%). This drop to 85% of the operating pressure is due to the safety valve closing at 85% of the operating pressure, preventing the low-temperature vessel's operating pressure from dropping further.

[0003] During the pressure drop, the cryogenic liquid nitrogen container releases cryogenic gas (gaseous cryogenic nitrogen), passively cooling the bursting disc. The extent of the temperature drop is determined by the amount of cryogenic nitrogen released. When the pressure within the container rises, the safety valve (see figure) opens, allowing cryogenic nitrogen to flow through the safety valve (bursting disc) and into the atmosphere. The bursting disc experiences the pressure drop and its temperature drops. The extent of the temperature drop depends on the amount of cryogenic nitrogen released by the safety valve: the more cryogenic liquid nitrogen released, the greater the temperature drop. In this way, we transform temperature monitoring into monitoring the amount of cryogenic nitrogen released during the test.

[0004] However, it is difficult to simulate the low-temperature nitrogen emissions of safety valves of various specifications on a fixed test platform in the existing technology. Summary of the Invention

[0005] The main purpose of the present invention is to provide a bursting disc detection device and method for cryogenic media, aiming to accurately detect bursting discs of different specifications under conditions close to actual use, thereby improving the detection quality and efficiency of bursting disc fatigue load tests. To achieve the above objectives, the present invention provides a bursting disc detection device for cryogenic media, comprising: A test container comprising a shell, wherein the inner cavity of the shell is a test cavity, the outer surface of the shell is exposed to enable heat exchange with the surrounding environment, and the shell is provided with an air outlet and a liquid inlet connected to the test cavity, wherein the air outlet is located above the liquid inlet; A liquid inlet assembly, comprising a liquid storage container and a liquid inlet valve, wherein the liquid storage container is connected to the test cavity through the liquid inlet for storing a low-temperature medium, and the liquid inlet valve is provided on the pipeline between the liquid storage container and the test cavity for controlling the connection between the liquid storage container and the test cavity; and The detection component includes a pressure detector, a temperature detector, a regulating valve, and a flow detector. The pressure detector and the temperature detector are at least partially arranged in the test cavity. The pressure detector is used to detect the pressure of the gas in the test cavity. The temperature detector is used to detect the temperature of the gas in the test cavity. The regulating valve is arranged on the pipeline between the gas outlet and the flow detector. The pipeline connecting the regulating valve and the gas outlet is provided with a test port, and the test port is used for installing a bursting disc.

[0006] In one embodiment, the bursting disc detection device for cryogenic media further includes a pressurizing assembly, and the pressurizing assembly includes: A pressurized container, two ends of which are connected to the top of the liquid storage container and the top of the test cavity respectively; a pressure booster, disposed on the pipeline between the liquid storage container and the pressure boosting container; and The boost air intake valve is arranged on the pipeline between the boost container and the liquid storage container, and is used to control the opening and closing of the connection between the liquid storage container and the enlarged container.

[0007] In one embodiment, the boost assembly further comprises: The boost pressure detector is at least partially disposed in the boost container to detect the pressure of the gas in the boost container.

[0008] In one embodiment, the boost assembly further comprises: The boost regulating valve is arranged on the pipeline between the boost container and the liquid storage container, and is used to adjust the gas flow from the boost container to the test cavity.

[0009] In one embodiment, the boost assembly further comprises: A check valve is provided on the pipeline between the pressurized container and the liquid storage container to prevent gas from flowing back from the pressurized container to the liquid storage container.

[0010] The present invention also provides a method for detecting a bursting disc for cryogenic media, the method comprising the following steps: Controlling the liquid storage container to inject cooling medium into the test cavity; detecting the pressure of the gas in the test cavity by the pressure detector, and measuring the temperature of the gas in the test cavity by the temperature detector; After reaching the set values ​​of gas pressure and temperature, the test emission volume W is calculated according to the formula t， Control the regulating valve to adjust the discharge amount according to the flow detector to achieve the W t , so that the gas is discharged and the discharge volume is maintained for a period of time; Controlling the regulating valve to adjust the discharge volume to zero according to the flow detector, and maintaining the discharge volume for a period of time, and repeating the above steps until the number of cycles required by the test is completed; Among them, the test emission W t =W s +W V , the W s , the W V , the W s W is the safe discharge volume of the shell per unit time, V The gas discharged per unit time under a certain volume of the shell, is the heated area of ​​the container, T is the saturation temperature of the cooling medium under the discharge pressure, is the thermal conductivity of the insulation material at room temperature, & is the thickness of the shell insulation layer, q is the latent heat of vaporization of the cooling medium under the discharge pressure, K is the coefficient of variation of the volume of the shell, V is the volume of the shell, and is the specific volume of the cooling medium before the regulating valve is opened, is the specific volume of the cooling medium after the regulating valve is opened, and t is the time.

[0011] In one embodiment, the cooling medium includes liquid nitrogen, K is 0.5, and t is 10.

[0012] In one embodiment, the bursting disc detection device for cryogenic media further includes a pressurizing assembly, and the pressurizing assembly includes: A pressurized container, two ends of which are connected to the top of the liquid storage container and the top of the test cavity respectively; a pressure booster connected in series on the pipeline between the liquid storage container and the pressure boosting container; and A boost air intake valve is provided on the pipeline between the boost container and the liquid storage container, and is used to control the opening and closing of the connection between the liquid storage container and the boost container; After the steps of detecting the pressure of the gas in the test cavity by the pressure detector and measuring the temperature of the gas in the test cavity by the temperature detector, the method further includes: When the gas pressure of the test cavity is less than a preset value, the pressurized container is controlled to inject gas into the test cavity until the gas pressure of the test cavity is greater than or equal to the preset value.

[0013] In one embodiment, the pressure of the pressurized container is ≥ 4 times the pressure of the test cavity.

[0014] In one embodiment, after the steps of detecting the pressure of the gas in the test cavity by the pressure detector and measuring the temperature of the gas in the test cavity by the temperature detector, the method further comprises: When the gas temperature of the test cavity is greater than a preset value, the liquid storage container is controlled to inject a cooling medium into the test cavity until the gas temperature of the test cavity is less than or equal to the preset value.

[0015] The technical solution of the present invention involves first closing the liquid inlet valve and installing the bursting disc to be tested at the test port when testing a bursting disc. The liquid inlet valve is then opened, allowing the cryogenic medium in the liquid storage container to be injected into the test cavity through the liquid inlet. As the cryogenic medium is injected, the temperature and pressure within the test cavity change. A pressure detector and a temperature detector monitor these changes in real time and transmit the data to a control system. A regulating valve adjusts the gas flow rate at the outlet, thereby controlling the pressure and temperature within the test cavity and simulating different operating conditions. A flow detector monitors the gas discharge flow rate, ensuring the stability and safety of the test process. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0017] Figure 1 This is a structural schematic diagram of an embodiment of a bursting disc detection device for cryogenic media provided by the present invention.

[0018] Description of Figure Numbers: 100. Bursting disc detection device for cryogenic media; 200. Bursting disc; 1. Test container; 11. Shell; 12. Test cavity; 2. Liquid inlet assembly; 21. Liquid storage container; 22. Liquid inlet valve; 3. Detection component; 31. Pressure detector; 32. Temperature detector; 33. Control valve; 34. Flow detector; 4. Boosting assembly; 41. Boosting container; 42. Supercharger; 43. Boosting intake valve; 44. Boosting pressure detector; 45. Boosting regulating valve; 46. Check valve.

[0019] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings and in conjunction with the embodiments. DETAILED DESCRIPTION

[0020] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0021] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0022] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of such features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0023] Bursting discs are one of the important safety accessories for pressure-bearing special equipment, and the safety performance of bursting discs must meet technical requirements. One of the technical indicators for the safety performance of bursting discs is to undergo fatigue load testing under certain technical conditions. The conditions for fatigue load testing under these certain technical conditions are mainly the two technical indicators of temperature and pressure. During the fatigue load test of bursting discs, in order to ensure the quality of the test, we need to ensure that the technical conditions for the test are highly consistent with the technical conditions for actual use, that is, the fluctuations in temperature and pressure must be consistent. The actual temperature and pressure conditions for the use of the disc are: In daily use, bursting discs are generally used in parallel with safety valves. When the equipment is over-pressurized, the safety valve will trip first. At this time, the parallel bursting disc will not trip, but the safety valve will trip. The low-temperature medium will flow through the bursting disc, and the temperature of the bursting disc will fluctuate, mainly showing a decrease first and then an increase. Before the safety valve trips, both the safety valve and the rupture disc come into contact with a gaseous medium at a low temperature. Based on field measurements and experience, the operating temperature is generally between -2°C (minus 2°C) and 5°C. The pressure drops from the vessel's operating pressure to 85% of the operating pressure (i.e., a pressure fluctuation of 100% to 85%). This drop to 85% of the operating pressure is due to the safety valve closing at 85% of the operating pressure, preventing the low-temperature vessel's operating pressure from dropping further.

[0024] During the pressure drop, the cryogenic liquid nitrogen container releases cryogenic gas (gaseous cryogenic nitrogen), passively cooling the bursting disc. The extent of the temperature drop is determined by the amount of cryogenic nitrogen released. When the pressure within the container rises, the safety valve (see figure) opens, allowing cryogenic nitrogen to flow through the safety valve (bursting disc) and into the atmosphere. The bursting disc experiences the pressure drop and its temperature drops. The extent of the temperature drop depends on the amount of cryogenic nitrogen released by the safety valve: the more cryogenic liquid nitrogen released, the greater the temperature drop. In this way, we transform temperature monitoring into monitoring the amount of cryogenic nitrogen released during the test.

[0025] However, it is difficult to simulate the low-temperature nitrogen emissions of safety valves of various specifications on a fixed test platform in the existing technology.

[0026] In order to solve the above technical solutions, Figure 1As shown, the present invention proposes a detection device 100 for a bursting disc 200 for cryogenic media, comprising a test container 1, a liquid inlet assembly 2, and a detection assembly 3: the test container 1 comprises a shell 11, the inner cavity of the shell 11 being a test cavity 12, the outer surface of the shell 11 being exposed so as to be able to exchange heat with the surrounding environment, the shell 11 being provided with an air outlet and a liquid inlet connected to the test cavity 12, the air outlet being located above the liquid inlet; the liquid inlet assembly 2 comprises a liquid storage container 21 and a liquid inlet valve 22, the liquid storage container 21 being connected to the test cavity 12 via the liquid inlet for storing cryogenic media, the liquid inlet valve 22 being provided between the liquid storage container 21 and the test cavity 12, for controlling the on-off connection between the liquid storage container 21 and the test cavity 12; the detection component 3 includes a pressure detector 31, a temperature detector 32, a regulating valve 33, and a flow detector 34, the pressure detector 31 and the temperature detector 32 are at least partially arranged in the test cavity 12, the pressure detector 31 is used to detect the pressure of the gas in the test cavity 12, the temperature detector 32 is used to detect the temperature of the gas in the test cavity 12, the regulating valve 33 is arranged on the pipeline between the air outlet and the flow detector 34, the pipeline connecting the regulating valve 33 and the air outlet is provided with a test port, and the test port is used for installing the bursting disc 200.

[0027] The technical solution of the present invention involves first closing the liquid inlet valve 22 and installing the bursting disc 200 to be tested at the test port when testing the bursting disc 200. The liquid inlet valve 22 is then opened, allowing the cryogenic medium in the liquid storage container 21 to be injected into the test cavity 12 through the liquid inlet. As the cryogenic medium is injected, the temperature and pressure within the test cavity 12 change. The pressure detector 31 and temperature detector 32 monitor these changes in real time and transmit the data to the control system. The gas flow rate at the gas outlet can be adjusted using the regulating valve 33, thereby controlling the pressure and temperature within the test cavity 12 and simulating different operating conditions. The flow rate detector 34 is used to monitor the gas discharge flow rate, ensuring the stability and safety of the test process.

[0028] In one embodiment, the cryogenic medium bursting disc 200 detection device 100 further includes a pressurization assembly 4, comprising a pressurization container 41, a pressurizer 42, and a pressurization inlet valve 43. The pressurization container 41 is connected at both ends to the top of the liquid storage container 21 and the top of the test cavity 12, respectively. The pressurizer 42 is located in the pipeline between the liquid storage container 21 and the pressurization container 41. The pressurization inlet valve 43 is located in the pipeline between the pressurization container 41 and the liquid storage container 21 to control the connection between the liquid storage container 21 and the pressurization container. With this arrangement, the pressurization container 41 serves as a gas storage and buffer, connecting the liquid storage container 21 and the top of the test cavity 12. It can store a certain amount of gas, providing a source of gas for rapid pressurization of the test cavity 12. The pressurizer 42 is installed in the pipeline between the liquid storage container 21 and the pressurization container 41, and its primary function is to increase the gas pressure. The booster 42 can raise the gas pressure within the liquid storage container 21 to the required level to meet the high-pressure environment simulation requirements for different bursting disc 200 tests. The booster inlet valve 43, located in the pipeline between the booster container 41 and the liquid storage container 21, is a key component for controlling gas flow. It precisely controls the connection between the liquid storage container 21 and the booster container 41, thereby flexibly adjusting the pressurization process. When rapid pressurization is required, the booster inlet valve 43 is opened, allowing the high-pressure gas within the booster container 41 to be quickly replenished to the test container 1. The ability to rapidly boost pressure reduces test preparation time and improves the efficiency of the entire testing process.

[0029] In one embodiment, the boost assembly 4 further includes a boost pressure detector 44, which is at least partially located within the boost container 41 to detect the pressure of the gas within the boost container 41. This configuration provides feedback from the boost pressure detector 44, further stabilizing the boost process. It can promptly detect pressure fluctuations and adjust the booster 42 to correct them, minimizing significant pressure fluctuations and ensuring the stability of the detection process. For example, during a long test, the pressure within the boost container 41 may fluctuate as gas consumption and temperature fluctuate. The boost pressure detector 44 can promptly adjust the operation of the booster 42 to maintain the pressure near the set value.

[0030] In one embodiment, the boost assembly 4 further includes a pressure regulating valve 45, disposed in the pipeline between the boost container 41 and the liquid storage container 21, for regulating the flow of gas from the boost container 41 to the test cavity 12. This configuration allows different types of bursting discs 200 to experience a variety of pressure variations in actual use, such as slow pressure increases, rapid pressure increases, and pulsed pressure changes. Precisely regulating the gas flow through the pressure regulating valve 45 allows for more accurate simulation of these complex pressure curves, ensuring that test results more accurately reflect actual operating conditions. For example, for bursting discs 200 that must withstand a slow pressure increase, the pressure within the test cavity 12 can be slowly increased by reducing the opening of the regulating valve 33. For bursting discs 200 that must withstand a sudden, high-pressure shock, the opening can be increased to achieve a rapid pressure increase.

[0031] In one embodiment, the boosting assembly 4 further includes a check valve 46, which is disposed in the pipeline between the boosting container 41 and the liquid storage container 21 to prevent gas from flowing back from the boosting container 41 to the liquid storage container 21. Thus configured, the check valve 46 prevents gas backflow and ensures a stable pressure within the boosting container 41. During the boosting process, the booster 42 pressurizes the gas and stores it in the boosting container 41. Without the check valve 46, the high-pressure gas within the boosting container 41 may flow back into the liquid storage container 21, causing the pressure within the boosting container 41 to drop and failing to achieve the desired boosting effect. With the check valve 46, the boosting container 41 can maintain a relatively high pressure, providing stable high-pressure gas to the test cavity 12, thereby more accurately simulating the operating state of the bursting disc 200 under high-pressure conditions.

[0032] The present invention further provides a method for detecting a bursting disc for cryogenic media. The method for detecting a bursting disc 200 for cryogenic media comprises the following steps: Controlling the liquid storage container 21 to inject cooling medium into the test cavity 12; The pressure of the gas in the test cavity 12 is detected by the pressure detector 31, and the temperature of the gas in the test cavity 12 is measured by the temperature detector 32; After reaching the set values ​​of gas pressure and temperature, the test emission volume W is calculated according to the formula t， Control the regulating valve 33 to adjust the discharge amount according to the flow detector 34 to achieve the W t , so that the gas is discharged and the discharge volume is maintained for a period of time; Control the regulating valve 33 to adjust the discharge volume to zero according to the flow detector 34, and maintain the discharge volume for a period of time, and repeat the above steps until the number of cycles required by the test is completed; Among them, the test emission W t =W s +WV , the W s , the W V , the W s is the safe discharge volume of the shell 11 per unit time, W V The gas discharged per unit time under a certain volume of the shell 11 is is the heated area of ​​the container, T is the saturation temperature of the cooling medium under the discharge pressure, is the thermal conductivity of the insulation material at room temperature, & is the thickness of the insulation layer of the shell 11, q is the latent heat of vaporization of the cooling medium under the discharge pressure, K is the coefficient of variation of the volume of the shell 11, V is the volume of the shell 11, and is the specific volume of the cooling medium before the regulating valve 33 is opened, is the specific volume of the cooling medium after the regulating valve 33 is opened, and t is the time.

[0033] In the technical solution of the present invention, by controlling the liquid storage container 2112 to inject the cooling medium into the test cavity 12, and monitoring the pressure and temperature of the gas in the test cavity 12 at the same time, it is possible to highly simulate the low temperature, specific pressure and temperature environment in which the bursting disc 200 for low-temperature media is actually working. This makes the detection process highly consistent with the actual use scenario, greatly improves the reference value of the detection results for practical applications, and ensures that the performance of the bursting disc 200 in actual use can be accurately reflected in the test. The test emission volume is calculated using a formula, which comprehensively considers multiple key factors such as the safe discharge volume of the shell 11 per unit time and the gas discharged per unit time under a certain volume of the shell 11, covering the heated area of ​​the container, the saturation temperature of the cooling medium, the thermal conductivity of the insulation material at room temperature, the thickness of the insulation layer of the shell 11, the latent heat of vaporization of the cooling medium, the volume change coefficient of the shell 11, etc. Accurate emission volume calculation helps to accurately evaluate the emission performance of the bursting disc 200 under different working conditions and reduce the problem of inaccurate detection caused by calculation errors. By repeatedly adjusting the emission volume to W t The test cycle continues until the required number of cycles is complete, comprehensively testing the performance stability of the bursting disc 200 at different stages and under repeated operating conditions. This rigorous cyclic testing effectively screens out bursting discs 200 that may experience performance fluctuations or failure during long-term use, ensuring the high reliability of the bursting discs 200 used in practical applications. Throughout the entire testing process, pressure, temperature, and discharge volume are monitored and precisely controlled in real time. For example, real-time data is fed back from the pressure detector 31 and the temperature detector 32, and the regulating valve 33 is controlled based on this data to adjust the discharge volume. This precise process control allows for the timely detection and correction of abnormalities during the testing process, ensuring the stability of the testing process and thus improving the reliability of the test results.

[0034] In one embodiment, the cooling medium comprises liquid nitrogen, K is 0.5, and t is 10. Liquid nitrogen is a common and high-performance cooling medium with an extremely low boiling point (approximately -196°C). Using liquid nitrogen as the cooling medium creates an environment within the test cavity 12 that resembles actual cryogenic conditions, allowing the bursting disc 200 to be tested under more realistic cryogenic conditions, thereby ensuring that the test results better reflect its performance in actual applications. The K value is set to 0.5, reflecting the change in the volume of the housing 11 during the test. An appropriate K value facilitates accurate calculation of the gas emitted per unit time for a given volume of the housing 11. Setting t to 10 ensures consistent and comparable emission calculations, facilitating comparison and analysis of results across different test batches or bursting discs 200.

[0035] Specifically, for example: T is -170°C under a discharge pressure of 1.1 MPa, ΔH is 6.28 m2, ΔH is 0.0216 KJ / mh°C, and the median value of & according to conventional vacuum insulation design is 0.08 m, q is at a discharge pressure of 1.1 MPa, the latent heat of vaporization of the liquid is 160 KJ / kg, V is 1.31 m3, ΔH is 0.0671 mm3 / kg, the specific volume of low-temperature nitrogen before the safety valve is opened at 1.0 MPa, and ΔH is 0.0775 mm3 / kg, the specific volume of low-temperature nitrogen when the safety valve is opened and closed at 0.85 MPa. Calculation shows that Ws==14.31 kg / h, W V =471.6kg / h, Wt=485.91kg / h.

[0036] In one embodiment, the device 100 for detecting a bursting disc 200 for cryogenic media further includes a pressurizing assembly 4, comprising a pressurizing container 41, a pressurizer 42, and a pressurizing inlet valve 43. The pressurizing container 41 has two ends connected to the top of the liquid storage container 21 and the top of the test cavity 12, respectively. The pressurizer 42 is connected in series to the pipeline between the liquid storage container 21 and the pressurizing container 41. The pressurizing inlet valve 43 is disposed on the pipeline between the pressurizing container 41 and the liquid storage container 21 to control the connection between the liquid storage container 21 and the pressurizing container. After detecting the pressure of the gas in the test cavity 12 by the pressure detector 31 and measuring the temperature of the gas in the test cavity 12 by the temperature detector 32, the device further includes: when the gas pressure in the test cavity 12 is less than a preset value, controlling the pressurizing container 41 to inject gas into the test cavity 12 until the gas pressure in the test cavity 12 is greater than or equal to the preset value. This arrangement allows for rapid pressure replenishment, reducing the time required to reach the preset pressure value during testing, making the entire testing process more compact and efficient. This reduces the time required to restore pressure due to insufficient pressure, significantly shortening the testing cycle, particularly when multiple cycles or batch testing are required. By ensuring testing stability and promptly raising the pressure within the test cavity 12 to the preset value, the testing process can be conducted under stable pressure conditions. A stable pressure environment helps improve the accuracy and reliability of test results and reduce testing errors caused by pressure fluctuations. Specifically, in one embodiment, the pressure of the booster container 41 is ≥ 4 times the pressure of the test cavity 12. This large pressure differential provides powerful momentum for gas flow from the booster container 41 to the test cavity 12. According to the principles of fluid mechanics, a greater pressure differential increases the speed of gas flow, allowing the pressure within the test cavity 12 to reach the preset value in a shorter period of time. This is crucial for improving testing efficiency, particularly in scenarios requiring frequent pressure adjustments or rapid testing of a large number of bursting discs 200, significantly shortening the testing cycle.

[0037] In one embodiment, after detecting the pressure of the gas in the test cavity 12 by the pressure detector 31 and measuring the temperature of the gas in the test cavity 12 by the temperature detector 32, the following steps are included: when the gas temperature in the test cavity 12 is greater than a preset value, controlling the liquid storage container 21 to inject a cooling medium into the test cavity 12 until the gas temperature in the test cavity 12 is less than or equal to the preset value. With this arrangement, a stable temperature environment is crucial for accurately testing the performance of the bursting disc 200. The mechanical properties and sealing properties of the bursting disc 200 may change at different temperatures. When the gas temperature in the test cavity 12 is too high, deviations in the test results may occur. By injecting a cooling medium to control the temperature within a preset range, the test process can be carried out under stable temperature conditions, thereby improving the accuracy and reliability of the test results. At the same time, by actively injecting a cooling medium to quickly lower the temperature, waiting time can be reduced, making the test process more compact and improving overall test efficiency.

[0038] The above description is merely an exemplary embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformation made by utilizing the contents of the present invention's description and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields, is included in the patent protection scope of the present invention.

Claims

1. A bursting disc detection device for cryogenic media, characterized in that: include: A test container comprising a shell, wherein the inner cavity of the shell is a test cavity, the outer surface of the shell is exposed to enable heat exchange with the surrounding environment, and the shell is provided with an air outlet and a liquid inlet connected to the test cavity, wherein the air outlet is located above the liquid inlet; A liquid inlet assembly, comprising a liquid storage container and a liquid inlet valve, wherein the liquid storage container is connected to the test cavity through the liquid inlet for storing a low-temperature medium, and the liquid inlet valve is provided on the pipeline between the liquid storage container and the test cavity for controlling the connection between the liquid storage container and the test cavity; as well as, The detection component includes a pressure detector, a temperature detector, a regulating valve, and a flow detector. The pressure detector and the temperature detector are at least partially arranged in the test cavity. The pressure detector is used to detect the pressure of the gas in the test cavity. The temperature detector is used to detect the temperature of the gas in the test cavity. The regulating valve is arranged on the pipeline between the gas outlet and the flow detector. The pipeline connecting the regulating valve and the gas outlet is provided with a test port, and the test port is used for installing a bursting disc.

2. The bursting disc detection device for cryogenic media according to claim 1, characterized in that: The bursting disc detection device for cryogenic media further includes a pressurizing assembly, which includes: A pressurized container, two ends of which are connected to the top of the liquid storage container and the top of the test cavity respectively; a pressure booster, disposed on the pipeline between the liquid storage container and the pressure boosting container; and The boost air intake valve is arranged on the pipeline between the boost container and the liquid storage container, and is used to control the opening and closing of the connection between the liquid storage container and the enlarged container.

3. The bursting disc detection device for cryogenic media according to claim 2, characterized in that: The boost assembly further comprises: The boost pressure detector is at least partially disposed in the boost container to detect the pressure of the gas in the boost container.

4. The bursting disc detection device for cryogenic media according to claim 2, characterized in that: The boost assembly further comprises: The boost regulating valve is arranged on the pipeline between the boost container and the liquid storage container, and is used to adjust the gas flow from the boost container to the test cavity.

5. The bursting disc detection device for cryogenic media according to claim 2, wherein: The boost assembly further comprises: A check valve is provided on the pipeline between the pressurized container and the liquid storage container to prevent gas from flowing back from the pressurized container to the liquid storage container.

6. A method for detecting a bursting disc for cryogenic media, applicable to the bursting disc detection device for cryogenic media according to any one of claims 1 to 5, characterized in that: The method for detecting a bursting disc for a cryogenic medium comprises the following steps: Controlling the liquid storage container to inject cooling medium into the test cavity; detecting the pressure of the gas in the test cavity by the pressure detector, and measuring the temperature of the gas in the test cavity by the temperature detector; After reaching the set values ​​of gas pressure and temperature, the test emission volume W is calculated according to the formula t， Control the regulating valve to adjust the discharge amount according to the flow detector to achieve the W t , so that the gas is discharged and the discharge volume is maintained for a period of time; Controlling the regulating valve to adjust the discharge volume to zero according to the flow detector, and maintaining the discharge volume for a period of time, and repeating the above steps until the number of cycles required by the test is completed; Among them, the test emission W t =W s +W V , the W s , the W V , the W s W is the safe discharge volume of the shell per unit time, V The gas discharged per unit time under a certain volume of the shell, is the heated area of ​​the container, T is the saturation temperature of the cooling medium under the discharge pressure, is the thermal conductivity of the insulation material at room temperature, & is the thickness of the shell insulation layer, q is the latent heat of vaporization of the cooling medium under the discharge pressure, K is the coefficient of variation of the volume of the shell, V is the volume of the shell, and is the specific volume of the cooling medium before the regulating valve is opened, is the specific volume of the cooling medium after the regulating valve is opened, and t is the time.

7. The method for detecting a bursting disc for cryogenic media according to claim 6, wherein: The cooling medium includes liquid nitrogen, K is 0.5, and t is 10.

8. The method for detecting a bursting disc for cryogenic media according to claim 6, wherein: The bursting disc detection device for cryogenic media further includes a pressurizing assembly, which includes: A pressurized container, two ends of which are connected to the top of the liquid storage container and the top of the test cavity respectively; a pressure booster connected in series on the pipeline between the liquid storage container and the pressure boosting container; and A boost air intake valve is provided on the pipeline between the boost container and the liquid storage container, and is used to control the opening and closing of the connection between the liquid storage container and the boost container; After the steps of detecting the pressure of the gas in the test cavity by the pressure detector and measuring the temperature of the gas in the test cavity by the temperature detector, the method further includes: When the gas pressure of the test cavity is less than a preset value, the pressurized container is controlled to inject gas into the test cavity until the gas pressure of the test cavity is greater than or equal to the preset value.

9. The method for detecting a bursting disc for cryogenic media according to claim 8, wherein: The pressure of the pressurized container is ≥ 4 times the pressure of the test cavity.

10. The method for detecting a bursting disc for cryogenic media according to claim 6, wherein: After the steps of detecting the pressure of the gas in the test cavity by the pressure detector and measuring the temperature of the gas in the test cavity by the temperature detector, the method further includes: When the gas temperature of the test cavity is greater than a preset value, the liquid storage container is controlled to inject a cooling medium into the test cavity until the gas temperature of the test cavity is less than or equal to the preset value.

Images