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CN-115560978-B - Sealing ring swelling testing device and method

CN115560978BCN 115560978 BCN115560978 BCN 115560978BCN-115560978-B

Abstract

The invention provides a sealing ring swelling test device which comprises a closed container for filling hydrogen, a temperature control system, a quality detection system and an information processing system, wherein the temperature control system can automatically adjust the temperature of the closed container, the quality detection system comprises a cantilever beam arm for hanging a sealing ring to be tested, the volume detection system is respectively connected with the information processing system through signals, the quality detection system can measure the quality of the sealing ring to be tested in the hydrogen absorption swelling process in real time, and the volume detection system can measure the volume of the sealing ring to be tested in the hydrogen absorption swelling process in real time and analyze and process the sealing ring to be tested through the information processing system, so that the quality and the volume change of the sealing ring to be tested in the hydrogen absorption swelling process can be calculated. The invention also provides a sealing ring swelling test method.

Inventors

  • CHENG LONGJUN
  • ZHAO WENQING
  • WANG ZHENZHONG
  • DING LILI

Assignees

  • 中国石油化工股份有限公司
  • 中国石油化工股份有限公司青岛安全工程研究院

Dates

Publication Date
20260512
Application Date
20210702

Claims (9)

  1. 1. A seal ring swelling test device comprising: a closed container (1) for filling hydrogen; A temperature control system (2) capable of automatically adjusting the temperature of the closed container; The mass detection system (3) comprises a cantilever arm (31) for suspending a sealing ring (9) to be detected, wherein the cantilever arm is arranged in the closed container, a first end of the cantilever arm penetrates through the side wall of the closed container and extends outwards, a resonance sensor (32) is arranged at the first end of the cantilever arm and is in signal connection with the information processing system, the sealing ring to be detected absorbs hydrogen and swells to deform the cantilever arm, the resonance sensor can detect the deformation of the cantilever arm to change vibration waveforms and upload the vibration waveforms to the information processing system, and the information processing system performs analysis and comparison so as to calculate the mass change of the sealing ring to be detected; Volume detection system (4), and An information processing system (5), the mass detection system and the volume detection system being respectively in signal connection with the information processing system; the mass detection system can measure the mass of the sealing ring to be detected in the hydrogen absorption swelling process in real time, and the volume detection system can measure the volume of the sealing ring to be detected in the hydrogen absorption swelling process in real time and analyze and process the sealing ring by the information processing system, so that the change of the mass and the volume of the sealing ring to be detected in the hydrogen absorption swelling process is calculated.
  2. 2. The seal ring swelling test device of claim 1, wherein the volume detection system comprises a radial camera (41) and an axial camera (42), both of which are in signal connection with the information processing system, The radial camera and the axial camera can shoot the sealing ring to be detected in real time, and upload the shot image to the information processing system, and the information processing system can construct a three-dimensional change chart of the sealing ring to be detected, so that the volume change of the sealing ring to be detected is calculated in real time.
  3. 3. The seal ring swelling test device according to claim 2, wherein the seal container is made of a transparent material, the radial camera is arranged above the seal container, the axial camera is arranged on one side of the seal container, and the radial camera and the axial camera can shoot the seal ring to be tested in real time through the seal container.
  4. 4. The seal ring swelling test device according to claim 1, wherein the temperature control system comprises a heat exchanger (21) and a temperature transmitter (22) mounted at the bottom of the closed vessel, and a PID controller (23) signally connected between the heat exchanger and the temperature transmitter, The temperature transmitter can detect the temperature in the closed container in real time and feed back the temperature to the PID controller, and the PID controller can control the heat exchanger to adjust the temperature in the closed container, so that the swelling condition of the sealing ring to be tested can be tested at different temperatures.
  5. 5. The seal ring swelling test device according to claim 4, wherein an inlet solenoid valve (24) is installed in an inlet line of the heat exchanger, the inlet solenoid valve is in signal connection with the PID controller, The PID controller can control the opening or closing of the inlet electromagnetic valve so as to control the flow of the medium in the heat exchanger, thereby adjusting the temperature in the closed container.
  6. 6. The seal ring swelling test device according to claim 1, characterized in that a pressure transmitter (6) is provided at the bottom of the closed container, which pressure transmitter is used for measuring the pressure value in the closed container.
  7. 7. The seal ring swelling test device according to claim 1, wherein the closed container is provided with a hydrogen inlet valve (11) and a hydrogen outlet valve (12), which are oppositely arranged on the side wall of the closed container.
  8. 8. A swelling test method of a sealing ring comprises the following steps: Providing a seal ring swelling test device according to any one of claims 1 to 7, hanging a seal ring to be tested on the cantilever arm; Filling hydrogen into the closed container until the pressure in the closed container reaches a preset value; setting a target temperature through a PID controller of the temperature control system, and maintaining the temperature in the closed container at the target temperature through the temperature control system; the device comprises a mass detection system, a volume detection system, an information processing system and a storage system, wherein the mass detection system is used for measuring the mass of the sealing ring to be detected in the hydrogen absorption swelling process in real time, and simultaneously measuring the volume of the sealing ring to be detected in the hydrogen absorption swelling process in real time through the volume detection system, and further analyzing and processing the volume by the information processing system, so that the mass and the volume change of the sealing ring to be detected in the hydrogen absorption swelling process are calculated; The weight and the volume change of the sealing ring to be measured in the hydrogen absorption swelling process under different temperature and pressure conditions can be measured by adjusting the preset value and the target temperature of the pressure in the closed container.
  9. 9. The seal ring swelling test method of claim 8, wherein the seal ring to be tested is suspended from the cantilever arm at a location proximate the second end.

Description

Sealing ring swelling testing device and method Technical Field The invention belongs to the technical field of sealing ring performance test, and particularly relates to a sealing ring swelling test device and method, which are particularly used for hydrogen O-shaped sealing ring swelling test. Background The hydrogen energy is taken as a clean, efficient, safe and sustainable new energy, is regarded as the clean energy with the most development potential in the 21 st century, and is the development direction of the strategic energy of human beings. There has been a strong competition between countries in the world in the commercialization of hydrogen energy vehicles. At present, the high-pressure hydrogen storage and transportation mode becomes a hydrogen energy storage and transportation mode with commercial application prospect at present due to the advantages of simple equipment structure, low energy consumption for preparing compressed hydrogen, high filling and discharging speed and the like. O-ring seals are often used as sealing members in high pressure hydrogen handling systems, where sealing performance is a major concern for ensuring safe and reliable hydrogen quick connectors. In the hydrogen loading and unloading system, the O-shaped sealing material is directly contacted with high-pressure high-purity hydrogen, adsorption, invasion, dissolution and diffusion of hydrogen can occur in the process, the volume of the O-shaped sealing ring can be obviously increased due to the hydrogen dissolved in the O-shaped sealing ring, and thus the swelling (namely, the hydrogen absorption expansion phenomenon) of rubber is caused, and the research shows that the solubility of hydrogen in the rubber material is in direct proportion to the hydrogen pressure. Excessive swelling of the O-ring seal necessarily results in seal failure of the hydrogen handling system, and the consequences of hydrogen leakage once not contemplated. Therefore, in order to characterize the swelling condition of the O-ring, the current common method is an accumulated metering method, that is, N O-rings absorb hydrogen and swell simultaneously, and finally, the mass increase and the volume increase of N O-rings are metered together, so that the average value of the accumulated effect results is used to characterize the hydrogen absorption and swelling condition of a single O-ring. However, this method has the disadvantages of wasting O-ring seals and inaccurate metering. Therefore, there is a need for a seal ring swelling test device and method that accurately characterizes the swelling of a hydrogen O-ring, which is important for the reliable safety performance of a hydrogen handling system. Disclosure of Invention Aiming at the technical problems, the invention aims to provide a sealing ring swelling test device which can measure the weight change and the volume change of a sealing ring in the hydrogen absorption swelling process on line in real time, has high accuracy of measurement results, can measure the weight and the volume change of the sealing ring in the swelling process under different temperature and pressure conditions, can accurately represent the swelling condition of a hydrogen O-shaped sealing ring, and ensures the safety of a hydrogen loading and unloading system. The invention also provides a sealing ring swelling test method. According to the first aspect of the invention, the sealing ring swelling test device comprises a closed container for filling hydrogen, a temperature control system, a quality detection system and an information processing system, wherein the temperature control system can automatically adjust the temperature of the closed container, the quality detection system comprises a cantilever beam arm for hanging a sealing ring to be tested, the volume detection system and the information processing system are respectively connected with the information processing system through signals, the quality detection system can measure the quality of the sealing ring to be tested in the hydrogen absorption swelling process in real time, and the volume detection system can measure the volume of the sealing ring to be tested in the hydrogen absorption swelling process in real time and conduct analysis processing through the information processing system, so that the quality and the volume change of the sealing ring to be tested in the hydrogen absorption swelling process can be calculated. In one embodiment, the cantilever arm is arranged in the closed container, a first end of the cantilever arm extends outwards through the side wall of the closed container, a resonance sensor is arranged at the first end of the cantilever arm, the resonance sensor is in signal connection with the information processing system, The to-be-detected sealing ring absorbs hydrogen and swells to deform the cantilever arm, the resonance sensor can detect the deformation of the cantilever arm to change vibration waveforms and upload