A pressure resistance alternating cycle device

Abstract

The utility model discloses a kind of pressure resistance alternating cycle devices, comprising: pressure storage tank assembly, temperature regulating component and control valve group;Pressure storage tank assembly includes pressure tank and vacuum tank, temperature regulating component includes tubular heat exchanger, condenser and gas heater, pressure tank is communicated with tubular heat exchanger by pipeline, vacuum tank is communicated with condenser by pipeline, gas heater is communicated with tubular heat exchanger, condenser and sample to be measured respectively by pipeline;Control valve group includes pressure regulating valve and pneumatic control valve.The utility model can accurately control the parameter of pressure alternating cycle, to be measured sample simulation and actual use environment highly consistent pressure alternating test environment;Test through the device, whether the sample to be measured appears leakage and part damage after 100000 times or more pressure alternating cycle can be effectively verified, guarantee the reliability and stability of the sample to be measured in practical application.

Description

Technical Field

[0001] This utility model relates to the field of pressure cycle testing technology, specifically to a pressure-resistant alternating cycle device. Background Technology

[0002] In industrial production, many devices or components need to operate under alternating pressure conditions for extended periods (such as some pipe components and seals). Under such conditions, repeated pressure loading and unloading generate cyclic fatigue stress within the components, which, over time, can lead to problems such as microcrack propagation, sealing surface wear failure, and even sudden structural fracture. To accurately verify the structural stability, sealing reliability, and long-term fatigue life of these products in actual use scenarios, professional pressure alternating cycle testing must be conducted. This involves simulating the amplitude, frequency, and number of cycles of pressure changes under actual operating conditions, subjecting the components to tens or even hundreds of thousands of cyclic pressure shocks, thereby screening out qualified products that meet industrial safety standards and usage requirements.

[0003] Existing pressure alternating cycle testing devices suffer from insufficient testing accuracy and poor stability when simulating specific pressure alternating parameters (such as high temperature, specific pressure peak and valley values, specific cycle frequency and holding time, etc.), making it difficult to meet stringent testing requirements (e.g., inlet medium temperature of 220℃; peak pressure of 250KPa; valley pressure of 10KPa; frequency of 0.5Hz; rise time of 5%, high pressure holding time of 45%, fall time of 5%, low pressure holding time of 45%; and no leakage or component damage even after more than 100,000 cycles). Utility Model Content

[0004] The purpose of this invention is to provide a pressure-resistant alternating circulation device to solve the above problems.

[0005] To achieve the above objectives, this utility model specifically adopts the following technical solution, including:

[0006] Pressure tank assembly used to create high and low pressure testing environments;

[0007] Temperature control component, used to regulate the temperature of the test gas;

[0008] Control valve assembly is used to control the test pressure and the opening and closing of the flow path;

[0009] The pressure tank assembly includes a pressure tank and a vacuum tank, and the temperature control assembly includes a tubular heat exchanger, a condenser, and a gas heater. The pressure tank is connected to the tubular heat exchanger via a pipeline, the vacuum tank is connected to the condenser via a pipeline, and the gas heater is connected to the tubular heat exchanger, the condenser, and the sample to be tested via pipelines.

[0010] The control valve group includes a pressure regulating valve and a pneumatic control valve. The pressure regulating valve is used to control the gas supply pressure, and the pneumatic control valve is used to control the opening and closing of the flow path.

[0011] As a further description of the above technical solution, the pressure tank is connected to the gas supply source through an input pipeline, and the vacuum tank is connected to the vacuum pump through an extraction pipeline.

[0012] As a further description of the above technical solution, a pressure regulating valve is provided on the input pipeline.

[0013] As a further description of the above technical solution, the pressure tank is connected to the tubular heat exchanger through a high-pressure pipeline, the vacuum tank is connected to the condenser through a low-pressure pipeline, and the gas heater is connected to the tubular heat exchanger, the condenser and the sample to be tested through a test pipeline.

[0014] As a further description of the above technical solution, the high-pressure pipeline is equipped with a first pneumatic valve, and the low-pressure pipeline is equipped with a second pneumatic valve.

[0015] As a further description of the above technical solution, the pressure tank is equipped with a first pressure sensor, and the vacuum tank is equipped with a second pressure sensor.

[0016] As a further description of the above technical solution, a third pressure sensor is provided on the test pipeline.

[0017] As a further description of the above technical solution, the gas heater is equipped with a first frequency converter, and the condenser is equipped with a second frequency converter.

[0018] As a further description of the above technical solution, a first temperature transmitter is provided on the gas heater inlet pipe, and a second temperature transmitter is provided on the gas heater outlet pipe.

[0019] As a further description of the above technical solution, a third temperature transmitter is provided on the condenser inlet pipe, and a fourth temperature transmitter is provided on the gas heater outlet pipe.

[0020] The beneficial effects of this utility model are as follows:

[0021] This invention can precisely control various parameters of pressure alternating cycles, thereby simulating a pressure alternating test environment that closely matches the actual use environment for the tested sample. By testing with this device, it is possible to effectively verify whether the tested sample will leak or have parts damaged after more than 100,000 pressure alternating cycles, thus ensuring the reliability and stability of the tested sample in practical applications.

[0022] To more clearly illustrate the structural features and functions of this utility model, the following detailed description of this utility model is provided in conjunction with the accompanying drawings and specific embodiments. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of the pressure-resistant alternating cycle device of this utility model.

[0024] Figure label:

[0025] 1. Pressure tank assembly; 101. Pressure tank; 102. Vacuum tank; 2. Temperature control assembly; 201. Tubular heat exchanger; 202. Condenser; 203. Gas heater; 3. Control valve assembly; 301. Pressure regulating valve; 302. Pneumatic control valve; 3021. First pneumatic valve; 3022. Second pneumatic valve; 4. Sample to be tested; 5. First pressure sensor; 6. Second pressure sensor; 7. Third pressure sensor; 8. First frequency converter; 9. Second frequency converter; 10. First temperature transmitter; 11. Second temperature transmitter; 12. Third temperature transmitter; 13. Fourth temperature transmitter; 14. Gas supply source. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings.

[0027] like Figure 1 As shown, in one embodiment, a pressure-resistant alternating cycle device includes: a pressure tank assembly 1, a temperature regulating assembly 2, and a control valve assembly 3;

[0028] The pressure tank assembly 1 includes a pressure tank 101 and a vacuum tank 102, which are used to form a high and low pressure test environment.

[0029] For example, both the pressure tank 101 and the vacuum tank 102 are integrally formed metal tanks with a volume of 60L. The pressure tank 101 is designed to withstand a pressure limit of 300KPa to store high-pressure gas, and the vacuum tank 102 can achieve an ultimate vacuum of 0.01Pa to create a low-pressure environment.

[0030] Furthermore, the temperature control assembly 2 includes a tubular heat exchanger 201, a condenser 202, and a gas heater 203, used to regulate the temperature of the test gas;

[0031] For example, the tubular heat exchanger 201 adopts a shell-and-tube structure with a heat exchange area of ​​2-3 m² and an industrial ethylene glycol solution as the heat transfer medium; the condenser 202 adopts an air-cooled finned tube array design with a heat dissipation area of ​​5-8 m²; the gas heater 203 adopts a finned electric heater with a rated power of 15 kW and a maximum temperature resistance of 300 °C; the three are connected in series through pipelines to form a temperature control loop, which can stabilize the temperature of the test gas in the range of -20 °C to 250 °C according to the test requirements.

[0032] Furthermore, the control valve assembly 3 includes a pressure regulating valve 301 and a pneumatic control valve 302, used to control the test pressure and the opening and closing of the flow path.

[0033] Please continue reading. Figure 1 In this embodiment, the air inlet of the pressure tank 101 is connected to the air supply source 14 through an input pipeline, while the air outlet of the vacuum tank 102 is connected to the vacuum pump 15 through an extraction pipeline.

[0034] Correspondingly, the outlet of the pressure tank 101 is connected to the inlet of the tubular heat exchanger 201 through a high-pressure pipeline, while the inlet of the vacuum tank 102 is connected to the condenser 202 through a low-pressure pipeline.

[0035] In addition, the gas heater 203’s inlet is connected to the tubular heat exchanger 201 through a test pipeline, and the gas heater 203’s outlet is connected to the condenser 202 and the inlet of the sample 4 to be tested through test pipelines respectively.

[0036] It should be noted that a pressure regulating valve 301 is installed on the input pipeline to control the gas supply pressure; correspondingly, a first pneumatic valve 3021 is installed on the high-pressure pipeline and a second pneumatic valve 3022 is installed on the low-pressure pipeline to control the flow path opening and closing.

[0037] Furthermore, the pressure vessel 101 is equipped with a first pressure sensor 5 for monitoring the gas pressure inside the pressure vessel 101; correspondingly, the vacuum vessel 102 is equipped with a second pressure sensor 6 for monitoring the gas pressure inside the vacuum vessel 102; in addition, a third pressure sensor 7 is installed on the test pipeline for monitoring the gas pressure inside the input sample 4.

[0038] Correspondingly, a first temperature transmitter 10 is installed on the gas inlet pipe of the gas heater 203 to monitor the gas temperature at the gas inlet of the gas heater 203; a second temperature transmitter 11 is installed on the gas outlet pipe of the gas heater 203 to monitor the gas temperature flowing from the gas outlet of the gas heater 203 to the sample 4 to be tested.

[0039] In addition, a third temperature transmitter 12 is installed on the inlet pipe of the condenser 202 to monitor the gas temperature at the inlet of the condenser 202; a fourth temperature transmitter 13 is installed on the outlet pipe of the gas heater 203 to monitor the gas temperature at the outlet of the condenser 202.

[0040] It should be noted that the gas heater 203 is equipped with a first frequency converter 8, which is used to control the heating power of the gas heater 203, thereby adjusting the gas temperature to a preset temperature (e.g., 220℃); the condenser 202 is correspondingly equipped with a second frequency converter 9, which is used to adjust the speed of the fan, thereby controlling the heat dissipation effect of the condenser 202.

[0041] Working principle:

[0042] (I) Setup of the test setup:

[0043] according to Figure 1 The flow path shown connects the pressure tank assembly 1, temperature regulation assembly 2, control valve assembly 3, and the sample under test through pipelines, ensuring that each connecting pipeline is well sealed to avoid air leakage affecting the test accuracy.

[0044] (II) Parameter Setting and Testing Process:

[0045] (1) Test preparation of gas supply source 14, pressure tank 101, vacuum tank 102 and vacuum pump 15: Turn on the gas supply source 14 and adjust the gas pressure entering the pressure tank 101 through the pressure regulating valve 301 so that the pressure tank 101 stores compressed air that can provide a peak pressure of 250KPa; then start the vacuum pump 15 to evacuate the vacuum tank 102 so that the vacuum tank 102 can provide a low pressure environment with a valley pressure of 10KPa.

[0046] (2) Temperature control: The heating power of the gas heater 203 is adjusted by the first frequency converter 8 connected to the gas heater 203 to heat the compressed air from the pressure tank 101. The gas temperature at the outlet of the gas heater 203 is monitored by the first temperature transmitter 10 to make the gas temperature reach 220℃. Then, through the synergistic effect of the tubular heat exchanger 201 and the condenser 202, combined with the monitoring of the third temperature transmitter 12 and the fourth temperature transmitter 13, the gas temperature entering the sample is ensured to be stable at 220℃. The fan speed is adjusted by the second frequency converter 9 connected to the fan to control the heat dissipation effect of the condenser 202, so as to accurately regulate the gas temperature.

[0047] (3) Pressure Alternating Cycle Control: By controlling the opening and closing of the first pneumatic valve 3021 and the second pneumatic valve 3022, and in conjunction with the pressure tank 101 and the vacuum tank 102, the pressure of the sample under test is alternately cycled according to the requirement of a frequency of 0.5Hz (rise time of 5%, high pressure holding time of 45%; fall time of 5%, low pressure holding time of 45%). During the cycle, the pressure value changes are monitored in real time by the first pressure sensor 5 set on the pressure tank 101, the second pressure sensor 6 set on the vacuum tank 102, and the third pressure sensor 7 set on the sample under test, to ensure that the pressure peak value is 250KPa, the valley value is 10KPa, and the time of each stage meets the requirements. At the same time, the temperature inside the sample under test is monitored by the second temperature transmitter 11 to ensure that the temperature remains stable during the test.

[0048] (4) Cycle count and result detection: Continue the above pressure alternation cycle. When the number of cycles reaches 100,000, conduct leakage detection and component damage inspection on the tested sample to determine whether it meets the requirements of no leakage and component damage.

[0049] Through the above technical solution, this application uses pressure tank 101 in conjunction with gas supply source 14 to provide a high-pressure environment, and vacuum tank 102 in conjunction with vacuum pump 15 to provide a low-pressure environment. Combined with gas heater 203, tubular heat exchanger 201 and condenser 202, the gas temperature is precisely controlled. And through various pressure sensors, temperature transmitters and frequency converters, etc., the parameters of pressure alternation cycle can be precisely controlled, thereby simulating a pressure alternation test environment that is highly consistent with the actual use environment for the sample under test.

[0050] This device can effectively verify whether the tested sample leaks or suffers damage after undergoing more than 100,000 pressure alternation cycles, ensuring the reliability and stability of the tested sample in practical applications.

[0051] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A pressure resistance alternating cycle device, characterized by, include: Pressure tank assembly (1) for creating a high and low pressure test environment; Temperature control component (2) is used to adjust the temperature of the test gas; The control valve assembly (3) is used to control the test pressure and the opening and closing of the flow path; The pressure tank assembly (1) includes a pressure tank (101) and a vacuum tank (102), and the temperature regulating assembly (2) includes a tubular heat exchanger (201), a condenser (202) and a gas heater (203). The pressure tank (101) is connected to the tubular heat exchanger (201) through a pipeline, the vacuum tank (102) is connected to the condenser (202) through a pipeline, and the gas heater (203) is connected to the tubular heat exchanger (201), the condenser (202) and the sample to be tested (4) through pipelines respectively. The control valve group (3) includes a pressure regulating valve (301) and a pneumatic control valve (302). The pressure regulating valve (301) is used to control the gas supply pressure, and the pneumatic control valve (302) is used to control the flow path opening and closing.

2. The pressure resistance alternating cycle device according to claim 1, characterized by The pressure tank (101) is connected to the gas supply source (14) through the input pipeline, and the vacuum tank (102) is connected to the vacuum pump through the extraction pipeline.

3. The pressure resistance alternating cycle device according to claim 2, characterized by A pressure regulating valve (301) is installed on the input pipeline.

4. The pressure cycle resistance device of claim 1, wherein, The pressure tank (101) is connected to the tubular heat exchanger (201) through a high-pressure pipeline, the vacuum tank (102) is connected to the condenser (202) through a low-pressure pipeline, and the gas heater (203) is connected to the tubular heat exchanger (201), the condenser (202) and the sample to be tested (4) through a test pipeline.

5. The pressure cycle resistance device of claim 4, wherein, The high-pressure pipeline is equipped with a first pneumatic valve (3021), and the low-pressure pipeline is equipped with a second pneumatic valve (3022).

6. The pressure cycle resistance device of claim 4, wherein, The pressure tank (101) is equipped with a first pressure sensor (5), and the vacuum tank (102) is equipped with a second pressure sensor (6).

7. The pressure cycle resistance device of claim 4, wherein, A third pressure sensor (7) is installed on the test pipeline.

8. The pressure cycle resistance device of claim 4, wherein, The gas heater (203) is equipped with a first frequency converter (8), and the condenser (202) is equipped with a second frequency converter (9).

9. The pressure cycle resistance device of claim 4, wherein, A first temperature transmitter (10) is installed on the gas heater (203) inlet pipe, and a second temperature transmitter (11) is installed on the gas heater (203) outlet pipe.

10. The pressure cycle resistance device of claim 4, wherein, A third temperature transmitter (12) is installed on the inlet pipe of the condenser (202), and a fourth temperature transmitter (13) is installed on the outlet pipe of the gas heater (203).

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