Method for testing interchangeability and reliability of liquid cooling quick connector of data center

Abstract

The invention discloses a data center liquid cooling quick connector interchangeability and reliability test method, and relates to the technical field of data center liquid cooling, and the method comprises the steps: S1, key dimension measurement; s2, high and low temperature alternating testing; s3, carrying out a cold and hot impact test; s4, vibration and impact testing; s5, carrying out a corrosion resistance test; s6, pressure pulse testing; s7, voltage drop testing; s8, testing connection force and disconnection force; s9, carrying out an air penetration test; s10, testing fluid loss; s11, durability testing; and S12, carrying out blasting test. According to the data center liquid cooling quick connector interchangeability and reliability testing method, a set of systematic and complete testing method is constructed, the testing environment, the testing process, the special testing tool and other key elements are covered, a plurality of connector key performance indexes are screened and determined to serve as the judgment standard of the testing result, and wide applicability is achieved.

Description

Technical Field

[0001] This invention relates to the field of data center liquid cooling technology, specifically to a method for testing the interchangeability and reliability of data center liquid cooling quick connectors. Background Technology

[0002] As a key functional component in data center cold-plate liquid cooling systems for controlling the on / off state of server liquid cooling pipelines, the performance and interchangeability of quick-connect couplings significantly impact the deployment cost and operational stability of the liquid cooling system. Currently, the industry has established several requirements and testing methods for quick-connect couplings, as detailed below: The first is the OCP Open Computing Project, jointly initiated by Meta, Intel, Rackspace, Goldman Sachs, and Arista Networks. This project defined the UQD (Universal Quick Connector) interface standard, specifying the range of specifications for quick connector dimensions, diameter, flow resistance, and leakage. However, the OCP UQD 1.0 specification only specifies the dimensions, diameter, and flow rate of individual connectors. Its verification method is a conformity check, and it does not yet provide systematic testing tools and methods, resulting in limited specification coverage.

[0003] Secondly, the International Organization for Standardization (ISO) published ISO 18869:2017, "Hydraulic fluid power—Test methods for couplings with or without tool drive," which specifies the testing and evaluation methods for the performance of quick-connect couplings in hydraulic fluid power applications. Test items include: pressure pulse, connection and disconnection force, corrosion resistance, durability, and pressure drop testing. However, while ISO 18869:2017 systematically lists various test items for liquid-cooled hand-operated quick-connect couplings, its focus remains limited to the performance and reliability of individual products, failing to address the performance of products from different manufacturers under interoperability conditions. Furthermore, this standard only provides a schematic diagram of the test fixture, without clearly defining the specific test fixture, test procedure, or criteria for judging test results. Summary of the Invention

[0004] The purpose of this invention is to provide a method for testing the interchangeability and reliability of liquid-cooled quick connectors in data centers, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this invention, based on existing technologies, proposes a complete testing method and standardized testing process, clearly defining the requirements for dedicated testing fixtures and the criteria for judging test results. This effectively verifies the individual performance of liquid-cooled quick-connect couplings and evaluates the interoperability and reliability of couplings from different manufacturers in arbitrary combinations, providing technical basis and reference standards for the industry to conduct similar tests and select products. The specific technical solution is as follows: A method for testing the interchangeability and reliability of liquid-cooled quick-connect couplings in data centers, comprising the following steps:

[0006] Furthermore, the specific operation of step S1 is as follows: a. Conduct visual and internal inspections of the quick-connect sample; b. Use tools to measure the key dimensions of the quick connector sample; c. Record the dimensional data; Judgment criteria: Check whether the appearance is clean and tidy, without burrs, scratches, etc.; whether the internal sealing rings, threads, etc. are free of defects; and whether the dimensional tolerances meet the requirements.

[0007] Furthermore, the specific operation of step S2 is as follows: a. Place the male and female connectors in the disconnected state and the male and female connectors in the connected state into the environmental test chamber; b.0~3h: Increase temperature to 70℃ and humidity to 95%; c.3~12h: Maintain temperature at 70℃ and humidity at 95%; d.12~18h: Cool down to -40℃, humidity 95% (humidity is not controlled below 25℃); e.18~24h: Maintain temperature -40℃; f. Repeat steps b through e 10 times; g. Remove the sample, inspect its appearance, and record the findings; Judgment criteria: The sample has no visible damage and can be inserted and removed normally without jamming after returning to room temperature.

[0008] Furthermore, the specific operation of step S3 is as follows: a. After removing the dust covers from the plug and socket, place them in the temperature chamber. Do not pressurize the quick-connect fittings. b. Set the extreme temperature values ​​to -55℃ and 125℃, with a temperature transition time not exceeding 5 minutes, and maintain the extreme temperature for 30 minutes, repeating 100 times; c. Conduct temperature shock tests; Judgment criteria: The sample has no visible damage and can be inserted and removed normally after returning to room temperature.

[0009] Furthermore, the specific operation of step S4 is as follows: Vibration testing methods: a. After the plug and socket are connected, rigidly install them on the comprehensive vibration test bench, connect them to the test pressure pump, fill with coolant, and maintain the internal pressure of the connector at 0.3MPa; b. Set the vibration frequency of the test bench to 5Hz~500Hz; the initial excitation acceleration ≥2grms; the duration of each XYZ axis is 20min; the entire frequency range lasts about 1min. Impact testing methods: a. After the plug and socket are connected, rigidly install them on the comprehensive vibration test bench, connect them to the test pressure pump, fill with coolant, and maintain the internal pressure of the connector at 0.3MPa; b. Set the impact parameters of the test bench: impact acceleration of 7.5g, half sine wave, impact time of 19ms, impact 3 times in each positive and negative direction of the XYZ axis, with an interval of no less than 20s between each two impacts; Judgment criteria: The sample is not deformed, insertion and removal are not difficult, and it can be inserted into place and unlocked normally.

[0010] Furthermore, the specific operation of step S5 is as follows: a. Perform a visual inspection on the quick connector; there should be no obvious abnormalities or defects. b. After the inspection is completed, remove the protective sleeves of the threaded end and the mating side of the quick connector sample, and put the male and female quick connector units into the neutral salt spray test chamber. c. Conduct the first salt spray test. Place all quick connector samples in a constant salt spray for 24 hours, then remove them and let them stand in dry air for 24 hours. Carefully observe the condition of all quick connector samples and record the results. d. Conduct a second salt spray test. Place all quick-connect samples in a constant salt spray for 48 hours, then remove them and let them stand in dry air for 48 hours. Carefully observe the condition of all quick-connect samples and record the results. Judgment criteria: No obvious corrosion on the sample surface, and no severe corrosion at the metal joints.

[0011] Furthermore, the specific operation of step S6 is as follows: a. Before testing, the leakage rate of the quick-connect male and female connectors and the male-female mating state shall be measured. The leakage rate shall be less than ≤1.0E-6pa.m3 / s; b. For connectors that meet the leakage rate requirements, connect them to the pressure pulse testing machine in the male and female plug-in states respectively, and set the test pulse range: low pressure 0.1Mpa (minimum system pressure), high pressure 1.0Mpa, frequency 1Hz (high and low pressure holding time 0.4s, high and low pressure change time 0.1s), 250,000 times; c. Perform a pulse test on the connector; Judgment criteria: No leakage during the test, leakage rate less than the specified value, and the liquid pressure resistance test is met.

[0012] Furthermore, the specific operation of step S7 is as follows: a. Connect the pipe that is compatible with the diameter of the quick-connect fitting under test directly to the test system; b. Based on the theoretical flow curve and the theoretical rated flow value of 6.44 L / min, select the sampling gradient from 30% to 150%, set automatic operation, test and record the pressure drop of the test system itself at the theoretical flow rate, and input the measured system pressure drop into the pipe loss table; c. Install the quick-connect coupling in the system shown in step 1, select a sampling gradient of 6.44 L / min from the theoretical flow rate, from 30% to 150%, set the automatic pipe loss reduction operation, and test and record the flow resistance data and cv value from male to female and from female to male. d. Plot the net pressure drop-flow rate curve for each flow direction based on the test parameters, with the X-axis representing flow rate and the Y-axis representing pressure drop; e. If the pressure drop across the quick-connect fitting in one direction is less than 10% different from the pressure drop across the quick-connect fitting in the other direction, the higher of the two values ​​should be used. f. Record the minimum CV value for each pair of connectors; Judgment criterion: The minimum Cv value of the quick connector is greater than the specified value (<0.8).

[0013] Furthermore, the specific operation of step S8 is as follows: a. Connect the quick-connect coupling to the insertion and removal test bench, and adjust the center positions of the male and female connectors to make them be on the same center line; b. Connect the system to the atmosphere and adjust the connector to a fully conductive state under normal pressure. Record the connector position at this time and enter this position into the test position in the equipment parameters. c. Perform insertion and removal tests and record the maximum force value during the test; d. Apply 3 bar of pressure, repeat the above test, and record the force value; Judgment criteria: This test is for data recording only and is not for assessment.

[0014] Furthermore, the specific operation of step S9 is as follows: a. Connect the connector to the insertion / extraction test bench and adjust the center positions of the male and female connectors to make them align with the same center line; b. Fix the female connector at the top and connect it to the sealed container. Fix the male connector at the bottom and connect it to the atmosphere through the pipeline. Do not apply pressure. Adjust the connector to a fully conductive state and record the position of the connector at this time. Enter this position into the test position in the equipment parameters. c. Record the reading when the fluid level in the graduated container is consistent; d. After 1000 unpressurized connections, record the fluid level reading inside the sealed container; e. Subtract the reading in d from c, and divide the difference by the number of connections. The calculated value is the amount of air infiltration per connection. Judgment criteria: The amount of air infiltration is recorded, but not assessed.

[0015] Furthermore, the specific operation of step S10 is as follows: a. Connect the quick-connect coupling to the insertion and removal test bench, and adjust the center positions of the male and female connectors to make them be on the same center line; b. Connect the system to the atmosphere and adjust the connector to a fully conductive state under normal pressure. Record the connector position at this time and enter this position into the test position in the equipment parameters. c. With the connector in the conductive state, remove all air bubbles from the liquid-filled container and record the scale value x1, then perform a plugging and unplugging cycle test; d. After looping 1000 times, repeat the above operation and read the scale value x2; e. Subtract the scale value in x2 from x1, and then divide by the number of cycles to get the fluid loss value for each connection; Judgment criteria: A single infusion volume less than the specified value (<0.025ml / time) is considered qualified.

[0016] Furthermore, the specific operation of step S11 is as follows: a. Connect the quick-connect coupling to the insertion and removal test bench, and adjust the center positions of the male and female connectors to make them be on the same center line; b. Connect the system to the atmosphere and adjust the connector to a fully conductive state under normal pressure. Record the connector position at this time and enter this position into the test position in the equipment parameters. c. With the connector in the conductive state, remove all air bubbles from the liquid-filled container and then perform a plug-in / plug-out cycle test; d. After 500 cycles, perform a leakage rate test (maximum pressure of 10 bar), maintain for 5 minutes, ensure the pressure decay does not exceed 1%, and record the actual value; Judgment criteria: The quick connector sample has no mechanical damage and the leakage rate is less than 1.0 x 10⁻³ Pa·m³ / s or the pressure drop does not exceed 1%.

[0017] Furthermore, the specific operation of step S12 is as follows: a. Connect the male connector to the pressure output port of the test bench, and connect it with the female connector to allow it to communicate with the atmosphere. Prefill the test pump with water to the male connector under test, and ensure that water flows out to expel air. Block the tail end of the male and female connectors, and hang a 50N weight at a position 10D (50mm) from the end face of the male connector. Cover the safety cover, and pressurize to 21 bar at a uniform rate within 1 minute, and maintain the pressure for 5 minutes. Observe whether the pressure gauge reading drops and whether there is any leakage in the connection. b. If the above test is normal, continue to increase the pressure to 80 bar and maintain the pressure for 5 minutes. Observe whether the pressure gauge reading changes and whether there is any leakage at the joint connection. c. Remove the quick connector and visually inspect its surface for any damage; manually insert and remove it 5 times consecutively to check if the insertion and removal are smooth and if the valve core returns to its normal position. Judgment criteria: The pressure gauge does not drop sharply, the sample shows no signs of damage, insertion and removal are smooth, and the valve core resets normally.

[0018] This invention provides a method for testing the interchangeability and reliability of liquid-cooled quick connectors in data centers, which has the following advantages: This invention constructs a complete testing method, covering key elements such as the testing environment, testing procedures, and dedicated testing fixtures. It selects and establishes several key performance indicators for connectors as criteria for judging test results. Based on this, the invention has broad applicability, suitable for performance and reliability testing of specific models of quick-connect couplings from a single manufacturer, as well as for verifying the performance and reliability of interoperable products from different manufacturers. Furthermore, this invention also has significant reference value for quick-connect coupling products that adhere to different technical specification systems. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the steps in the present invention for testing the interchangeability and reliability of a data center liquid-cooled quick connector; Figure 2 This is a test technical requirement table for a data center liquid-cooled quick connector interchangeability and reliability test method according to the present invention; Figure 3 This is a schematic diagram of the male connector dimension measurement position in the data center liquid-cooled quick connector interchangeability and reliability testing method of the present invention. Figure 4 This is a schematic diagram of the female connector size measurement position in the data center liquid-cooled quick connector interchangeability and reliability testing method of the present invention. Figure 5 This invention provides a tolerance dimension requirement table for a data center liquid-cooled quick connector interchangeability and reliability testing method. Figure 6 This is a schematic diagram of the vibration-shock direction of a data center liquid-cooled quick connector interchangeability and reliability testing method according to the present invention. Figure 7 This is a schematic diagram of the pressure drop test fixture for a data center liquid-cooled quick connector interchangeability and reliability test method according to the present invention; Figure 8 This invention provides a method for testing the interchangeability and reliability of liquid-cooled quick connectors in data centers. Figure 7 Example table of pressure drop test fixtures; Figure 9 This is a schematic diagram of the air infiltration test fixture for a data center liquid cooling quick connector interchangeability and reliability test method according to the present invention. Figure 10 This invention provides a method for testing the interchangeability and reliability of liquid-cooled quick connectors in data centers. Figure 9 Example table of test fixtures for air infiltration test. Detailed Implementation

[0020] The embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of the invention.

[0021] like Figures 1-10 As shown, a method for testing the interchangeability and reliability of liquid-cooled quick connectors in data centers includes the following steps: S1. Critical dimension measurement: Testing instruments: Vernier calipers, micrometers, height gauges, projectors, thread ring gauges (TB grade).

[0022] Test method: Perform visual and internal inspections on the quick connector samples, measure key dimensions using tools, and record the data.

[0023] a. Conduct visual and internal inspections of the quick-connect sample; b. Use tools to measure the key dimensions of the quick connector sample; c. Record the dimensional data.

[0024] Judgment criteria: I. The appearance should meet the following requirements: a. The surface is clean and tidy, without obvious defects such as burrs or scratches; b. The surface coating is free of defects, such as leakage, bubbles, peeling, etc. c. There should be no obvious color difference or spots in the appearance of products from the same batch; d. Liquid quick couplings should be free of water stains, grease residue, metal shavings, and other impurities.

[0025] II. The internal requirements should meet the following: a. The sealing ring should be free from defects such as scratches, dirt, cracks, and deformation; b. The thread should be free of rotten teeth and burrs, the chamfer should be symmetrical, and the through hole should be perpendicular.

[0026] III. Dimensional tolerances shall meet the following requirements: see Figure 3 .

[0027] S2, High and Low Temperature Alternating Test: Testing instrument: Environmental test chamber with controllable temperature change rate.

[0028] Test method: The quick connector sample was placed in an environmental test chamber and subjected to multiple cycles of high and low temperature changes.

[0029] a. Place the male and female connectors in the disconnected state and the male and female connectors in the connected state into the environmental test chamber; b.0~3h: Increase temperature to 70℃ and humidity to 95%; c.3~12h: Maintain temperature at 70℃ and humidity at 95%; d.12~18h: Cool down to -40℃, humidity 95% (humidity is not controlled below 25℃); e.18~24h: Maintain temperature -40℃; f. Repeat steps b through e 10 times; g. Remove the sample, inspect its appearance, and record the findings.

[0030] Judgment criteria: The quick connector sample should have no visible damage. After returning to room temperature, it should be able to be inserted and removed normally without jamming. It is considered qualified if it can be inserted into place normally and unlocked normally.

[0031] S3, Thermal Shock Test: Test instrument: Temperature shock chamber (operating temperature range -65℃~200℃, temperature transition time -65℃~200℃ / 200℃~-65℃≤5min).

[0032] Test method: The quick connector sample is subjected to rapid switching between extreme high temperature and low temperature and held for a certain period of time, and the cycle is repeated multiple times.

[0033] a. After removing the dust covers from the plug and socket, place them in the temperature chamber. Do not pressurize the quick-connect fittings. b. Set the extreme temperature values ​​to -55℃ and 125℃, with a temperature transition time not exceeding 5 minutes, and maintain the extreme temperature for 30 minutes, repeating 100 times; c. Conduct temperature shock tests.

[0034] Judgment criteria: The quick connector sample should have no visible damage. After returning to room temperature, it should be able to be inserted and removed normally without jamming. It is considered qualified if it can be inserted into place normally and unlocked normally.

[0035] S4. Vibration and Shock Test: Test instrument: Vibration test bench (maximum acceleration: 180g; maximum load: 800kg; frequency range: 2~2400Hz).

[0036] Test method: Vibration and shock tests were conducted on the quick-connect couplings after they were inserted to simulate the vibration and shock environment during transportation or use.

[0037] I. Vibration testing methods: a. After the plug and socket are connected, rigidly install them on the comprehensive vibration test bench, connect them to the test pressure pump, fill with coolant, and maintain the internal pressure of the connector at 0.3MPa; b. Set the vibration frequency of the test bench to 5Hz~500Hz; initial excitation acceleration ≥2grms; duration of each XYZ axis 20min; the entire frequency range lasts about 1min.

[0038] II. Impact Test Method: a. After the plug and socket are connected, rigidly install them on the comprehensive vibration test bench, connect them to the test pressure pump, fill with coolant, and maintain the internal pressure of the connector at 0.3MPa; b. Set the impact parameters of the test bench: impact acceleration of 7.5g, half sine wave, impact time of 19ms, impact 3 times in each positive and negative direction of the XYZ axis, with an interval of no less than 20s between each two impacts.

[0039] Judgment criteria: Quick connector samples are considered qualified if they are free from deformation, do not jam when plugged in or unplugged, and can be inserted into the correct position and unlocked normally.

[0040] S5, Corrosion Resistance Test: Testing equipment: Neutral salt spray chamber, sodium chloride. (Constant salt spray test conditions are as follows: 5% sodium chloride solution (NaCl), pH value 6.5~7.2, spray temperature: 35℃. Salt spray deposition rate: 1~3ml / h / 80cm²) Test method: The quick connector sample was placed in a salt spray environment for a certain period of time to simulate harsh scenarios such as the seaside.

[0041] a. Perform a visual inspection on the quick connector; there should be no obvious abnormalities or defects. b. After the inspection is completed, remove the protective sleeves of the threaded end and the mating side of the quick connector sample, and put the male and female quick connector units into the neutral salt spray test chamber. c. Conduct the first salt spray test. Place all quick connector samples in a constant salt spray for 24 hours, then remove them and let them stand in dry air for 24 hours. Carefully observe the condition of all quick connector samples and record the results. d. Conduct a second salt spray test. Place all quick-connect samples in a constant salt spray for 48 hours, then remove them and let them stand in dry air for 48 hours. Carefully observe the condition of all quick-connect samples and record the results.

[0042] Judgment criteria: After the salt spray test, there should be no obvious blackening or darkening on the surface of the quick connector, no serious corrosion at the metal joints, the corrosion area of the metal protective layer should be less than 30% of the area of the metal protective layer, and there should be no bubbles, wrinkles, cracks or peeling on the painted layer except at local edges, and the base metal should not show corrosion. There should be no obvious whitening, swelling, bubbling, cracking or pitting on non-metallic materials. It is considered qualified.

[0043] S6. Pressure pulse test: Testing instrument: Pressure pulse machine, which should meet the requirements for pulses in GB / T 5568-2022.

[0044] Testing method: Conduct high-pressure and low-pressure pulse tests on the quick connector to simulate impact scenarios such as water hammer.

[0045] a. Before testing, measure the leakage rate of the male head, female head and the state of male-female insertion of the quick connector. The leakage rate requirement is less than or equal to ≤1.0E-6 pa.m3 / s; b. For the connectors with leakage rate meeting the requirements, connect them to the pressure pulse testing machine respectively in the state of male-female insertion of the male head and female head. Set the test pulse range: low pressure 0.1 Mpa (the minimum pressure of the system), high pressure 1.0 Mpa, frequency 1 Hz (the holding time of high and low pressure is 0.4 s, and the change time of high and low pressure is 0.1 s), 250,000 times; c. Conduct pulse testing on the connectors.

[0046] Judgment criteria: For a qualified judgment, the following three conditions need to be met simultaneously: During the testing process, use a water test paper to confirm whether there is water leakage in the quick connector. After the testing is completed, conduct an airtight test again. No leakage is considered qualified; Conduct leakage rate tests on the quick connectors in three states: male head, female head and the state of male-female insertion. The leakage rate should be less than 1.0x10(-3) Pa.m³ / s; Meet the liquid pressure resistance test.

[0047] S7. Pressure drop test: Testing instrument: Flow and pressure resistance burst test bench (small flow: 0~20 L / min, large flow: 0~300 L / min, pressure difference range: 0~200 kpa, pressure accuracy: ±0.25%FS, flow accuracy: ±1%FS).

[0048] Testing method: Measure the pressure drop of the quick connector at different flow rates through the testing system and draw a pressure drop - flow rate curve.

[0049] a. Connect the pipeline matching the diameter of the quick connector to be tested directly to the testing system, as Figure 7 shown, and the key point correspondence table is as Figure 8 shown; b. Based on the theoretical flow curve and the theoretical rated flow value of 6.44 L / min, select the sampling gradient from 30% to 150%, set automatic operation, test and record the pressure drop of the test system itself at the theoretical flow rate, and input the measured system pressure drop into the pipe loss table; c. Install the quick-connect coupling in the system shown in step 1, select a sampling gradient of 6.44 L / min from the theoretical flow rate, from 30% to 150%, set the automatic pipe loss reduction operation, and test and record the flow resistance data and cv value from male to female and from female to male. d. Plot the net pressure drop-flow rate curve for each flow direction based on the test parameters, with the X-axis representing flow rate and the Y-axis representing pressure drop; e. If the pressure drop across the quick-connect fitting in one direction is less than 10% different from the pressure drop across the quick-connect fitting in the other direction, the higher of the two values ​​should be used. f. Record the minimum CV value for each pair of connectors.

[0050] Judgment criteria: The flow resistance of quick connectors is based on the actual measured flow resistance curve. If the minimum cv value is greater than 0.8, it is considered qualified.

[0051] S8. Connection and disconnection force test: Test instrument: Insertion and extraction test bench (pressure range: 0~10bar, positioning accuracy: ±0.1mm, tension and compression sensor range: 0~2000N).

[0052] Test method: Measure the connection force and disconnection force of the quick connector under normal pressure and pressure conditions.

[0053] a. Connect the quick-connect coupling to the insertion and removal test bench, and adjust the center positions of the male and female connectors to make them be on the same center line; b. Connect the system to the atmosphere and adjust the connector to a fully conductive state under normal pressure. Record the connector position at this time and enter this position into the test position in the equipment parameters. c. Perform insertion and removal tests and record the maximum force value during the test; d. Apply 3 bar of pressure, repeat the above test, and record the force value.

[0054] Judgment criteria: This test is for data recording only and is not for assessment.

[0055] S9. Air infiltration test: Test instrument: Insertion and extraction test bench (pressure range: 0~10bar, positioning accuracy: ±0.1mm, tension and compression sensor range: 0~2000N).

[0056] Test method: The sealing performance of the quick connector is evaluated by measuring the amount of air leakage after multiple insertions and removals.

[0057] a. Connect the connector to the insertion / extraction test bench and adjust the center positions of the male and female connectors to make them align with the same center line; b. Fix the female connector at the top and connect it to the sealed container. Fix the male connector at the bottom and connect it to the atmosphere through the pipeline. Do not apply pressure. Adjust the connector to a fully conductive state and record the position of the connector at this time. Enter this position into the test position in the equipment parameters. c. Record the reading when the fluid level in the graduated container is consistent; d. After 1000 unpressurized connections, record the fluid level reading inside the sealed container; e. Subtract the reading in d from c, and divide the difference by the number of connections. The calculated value is the amount of air infiltration per connection.

[0058] Judgment criteria: The amount of air infiltration is recorded, but not assessed.

[0059] S10, Fluid Loss Test: Test instrument: Insertion and extraction test bench (pressure range: 0~10bar, positioning accuracy: ±0.1mm, tension and compression sensor range: 0~2000N).

[0060] Test method: The leak-proof capability of the quick connector is evaluated by measuring the amount of fluid overflow after multiple insertions and removals.

[0061] a. Connect the quick-connect coupling to the insertion and removal test bench, and adjust the center positions of the male and female connectors to make them be on the same center line; b. Connect the system to the atmosphere and adjust the connector to a fully conductive state under normal pressure. Record the connector position at this time and enter this position into the test position in the equipment parameters. c. With the connector in the conductive state, remove all air bubbles from the liquid-filled container and record the scale value x1, then perform a plugging and unplugging cycle test; d. After looping 1000 times, repeat the above operation and read the scale value x2; e. Subtract the scale value in x2 from x1, and then divide by the number of cycles to get the fluid loss value for each connection.

[0062] Judgment criteria: A single infusion volume of less than 0.025 ml is considered qualified.

[0063] S11, Durability Test: Test instrument: Insertion and extraction test bench (pressure range: 0~10bar, positioning accuracy: ±0.1mm, tension and compression sensor range: 0~2000N).

[0064] Test method: The quick connector was subjected to multiple insertion and removal cycles and its leakage rate was measured.

[0065] a. Connect the quick-connect coupling to the insertion and removal test bench, and adjust the center positions of the male and female connectors to make them be on the same center line; b. Connect the system to the atmosphere and adjust the connector to a fully conductive state under normal pressure. Record the connector position at this time and enter this position into the test position in the equipment parameters. c. With the connector in the conductive state, remove all air bubbles from the liquid-filled container and then perform a plug-in / plug-out cycle test; d. After 500 cycles, perform a leakage rate test (maximum pressure of 10 bar), maintain for 5 minutes, ensure the pressure decay does not exceed 1%, and record the actual value.

[0066] Judgment criteria: The quick connector sample should have no mechanical damage and the leakage rate should be less than 1.0 x 10⁻³ Pa·m³ / s or the pressure drop should not exceed 1%.

[0067] S12, Explosion Test: Test instruments: flow and pressure burst test bench (burst pressure test range: low pressure: 0~80bar, high pressure: 0~1400bar, pressure accuracy: ±0.25%FS), the pressure increase rate should be adjustable.

[0068] Test method: Gradually increase the pressure on the quick connector until it reaches the burst pressure, and observe its performance.

[0069] a. Connect the male connector to the pressure output port of the test bench, and connect it with the female connector to allow it to communicate with the atmosphere. Prefill the test pump with water to the male connector under test, and ensure that water flows out to expel air. Block the tail end of the male and female connectors, and hang a 50N weight at a position 10D (50mm) from the end face of the male connector. Cover the safety cover, and pressurize to 21 bar at a uniform rate within 1 minute, and maintain the pressure for 5 minutes. Observe whether the pressure gauge reading drops and whether there is any leakage in the connection. b. If the above test is normal, continue to increase the pressure to 80 bar and maintain the pressure for 5 minutes. Observe whether the pressure gauge reading changes and whether there is any leakage at the joint connection. c. Remove the quick connector and visually inspect its surface for damage; manually insert and remove it 5 times consecutively to check for smooth insertion and removal and whether the valve core returns to its normal position.

[0070] Judgment criteria: A quick connector sample is considered to have passed the test if it meets all of the following conditions: The pressure gauge did not show a sharp drop within 5 minutes; No signs of damage were found upon visual inspection; After inserting and removing the valve 5 times consecutively, the insertion and removal were smooth and the valve core reset normally.

[0071] The embodiments of the present invention are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the invention to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described in order to better illustrate the principles and practical application of the invention, and to enable those skilled in the art to understand the invention and to design various embodiments with various modifications suitable for a particular purpose.

Claims

1. A method for testing the interchangeability and reliability of liquid-cooled quick connectors in data centers, characterized in that, Includes the following steps: S1. Critical Dimension Measurement: Perform visual and internal inspections on the quick connector sample, measure critical dimensions using tools, and record the data; S2. High and low temperature alternating test: The quick connector sample is placed in an environmental test chamber and subjected to multiple cycles of change from high temperature to low temperature. S3. Thermal shock test: Place the quick connector in an extreme temperature environment and maintain it for a certain period of time, then perform rapid switching between high and low temperatures, repeating the cycle multiple times. S4. Vibration and Shock Test: Vibration and shock tests are conducted on the quick-connect coupling after mating to simulate the vibration and shock environment during transportation or use. S5. Corrosion resistance test: Place the quick connector sample in a salt spray environment for a certain period of time to simulate harsh scenarios such as the seaside. S6. Pressure Pulse Test: Perform high-pressure and low-pressure pulse tests on the quick connector to simulate impact scenarios such as water hammer. S7. Pressure Drop Test: Measure the pressure drop of the quick connector at different flow rates using a test system and plot the pressure drop-flow curve. S8. Connection and disconnection force test: Measure the connection and disconnection force of the quick connector under normal pressure and pressure conditions; S9. Air penetration test: The airtightness of the quick connector is evaluated by measuring the amount of air penetration after multiple insertions and removals. S10. Fluid Loss Test: The fluid control capability of the quick connector is evaluated by measuring the fluid loss value after multiple insertions and removals. S11. Durability test: The quick connector is subjected to multiple insertion and removal cycles and its leakage rate is measured. S12. Burst test: Gradually increase the pressure on the quick connector until it reaches the burst pressure, and observe its performance. The specific operation of step S1 is as follows: a. Conduct visual and internal inspections of the quick-connect sample; b. Use tools to measure the key dimensions of the quick connector sample; c. Record the dimensional data; The specific operation of step S2 is as follows: a. Place the male and female connectors in the disconnected state and the male and female connectors in the connected state into the environmental test chamber; b.0~3h: Increase temperature to 70℃ and humidity to 95%; c.3~12h: Maintain temperature at 70℃ and humidity at 95%; d.12~18h: Temperature reduced to -40℃, humidity 95%; e.18~24h: Maintain temperature -40℃; f. Repeat steps b through e 10 times; g. Remove the sample, inspect its appearance, and record the findings; The specific operation of step S3 is as follows: a. After removing the dust covers from the plug and socket, place them in the temperature chamber. Do not pressurize the quick-connect fittings. b. Set the extreme temperature values ​​to -55℃ and 125℃, with a temperature transition time not exceeding 5 minutes, and maintain the extreme temperature for 30 minutes, repeating 100 times; c. Conduct temperature shock tests.

2. The method for testing the interchangeability and reliability of a data center liquid-cooled quick connector according to claim 1, characterized in that, The specific operation of step S4 is as follows: Vibration testing methods: a. After the plug and socket are connected, rigidly install them on the comprehensive vibration test bench, connect them to the test pressure pump, fill with coolant, and maintain the internal pressure of the connector at 0.3MPa; b. Set the vibration frequency of the test bench to 5Hz~500Hz; the initial excitation acceleration ≥2grms; the duration of each XYZ axis is 20min; the entire frequency range lasts about 1min. Impact testing methods: a. After the plug and socket are connected, rigidly install them on the comprehensive vibration test bench, connect them to the test pressure pump, fill with coolant, and maintain the internal pressure of the connector at 0.3MPa; b. Set the impact parameters of the test bench: impact acceleration of 7.5g, half sine wave, impact time of 19ms, impact 3 times in each positive and negative direction of the XYZ axis, with an interval of no less than 20s between each two impacts.

3. The method for testing the interchangeability and reliability of a data center liquid-cooled quick connector according to claim 1, characterized in that, The specific operation of step S5 is as follows: a. Perform a visual inspection on the quick connector; there should be no obvious abnormalities or defects. b. After the inspection is completed, remove the protective sleeves of the threaded end and the mating side of the quick connector sample, and put the male and female quick connector units into the neutral salt spray test chamber. c. Conduct the first salt spray test. Place all quick connector samples in a constant salt spray for 24 hours, then remove them and let them stand in dry air for 24 hours. Carefully observe the condition of all quick connector samples and record the results. d. Conduct a second salt spray test. Place all quick-connect samples in a constant salt spray for 48 hours, then remove them and let them stand in dry air for 48 hours. Carefully observe the condition of all quick-connect samples and record the results.

4. The method for testing the interchangeability and reliability of a data center liquid-cooled quick connector according to claim 1, characterized in that, The specific operation of step S6 is as follows: a. Before testing, the leakage rate of the quick-connect male and female connectors and the male-female mating state shall be measured. The leakage rate shall be less than ≤1.0E-6pa.m3 / s; b. For joints that meet the leakage rate requirements, connect them to the pressure pulse testing machine in the male and female plug-in state respectively, and set the test pulse range: low pressure 0.1Mpa, high pressure 1.0Mpa, frequency 1Hz, 250,000 times; c. Perform a pulse test on the connector.

5. The method for testing the interchangeability and reliability of a data center liquid-cooled quick connector according to claim 1, characterized in that, The specific operation of step S7 is as follows: a. Connect the pipe that is compatible with the diameter of the quick-connect fitting under test directly to the test system; b. Based on the theoretical flow curve and the theoretical rated flow value of 6.44 L / min, select the sampling gradient from 30% to 150%, set automatic operation, test and record the pressure drop of the test system itself at the theoretical flow rate, and input the measured system pressure drop into the pipe loss table; c. Install the quick-connect coupling in the system shown in step 1, select a sampling gradient of 6.44 L / min from the theoretical flow rate, from 30% to 150%, set the automatic pipe loss reduction operation, and test and record the flow resistance data and cv value from male to female and from female to male. d. Plot the net pressure drop-flow rate curve for each flow direction based on the test parameters, with the X-axis representing flow rate and the Y-axis representing pressure drop; e. If the pressure drop across the quick-connect fitting in one direction is less than 10% different from the pressure drop across the quick-connect fitting in the other direction, the higher of the two values ​​should be used. f. Record the minimum CV value for each pair of connectors.

6. The method for testing the interchangeability and reliability of a data center liquid-cooled quick connector according to claim 1, characterized in that, The specific operation of step S8 is as follows: a. Connect the quick-connect coupling to the insertion and removal test bench, and adjust the center positions of the male and female connectors to make them be on the same center line; b. Connect the system to the atmosphere and adjust the connector to a fully conductive state under normal pressure. Record the connector position at this time and enter this position into the test position in the equipment parameters. c. Perform insertion and removal tests and record the maximum force value during the test; d. Apply 3 bar of pressure, repeat the above test, and record the force value.

7. The method for testing the interchangeability and reliability of a data center liquid-cooled quick connector according to claim 1, characterized in that, The specific operation of step S9 is as follows: a. Connect the connector to the insertion / extraction test bench and adjust the center positions of the male and female connectors to make them align with the same center line; b. Fix the female connector at the top and connect it to the sealed container. Fix the male connector at the bottom and connect it to the atmosphere through the pipeline. Do not apply pressure. Adjust the connector to a fully conductive state and record the position of the connector at this time. Enter this position into the test position in the equipment parameters. c. Record the reading when the fluid level in the graduated container is consistent; d. After 1000 unpressurized connections, record the fluid level reading inside the sealed container; e. Subtract the reading in d from c, and divide the difference by the number of connections. The calculated value is the amount of air infiltration per connection.

8. The method for testing the interchangeability and reliability of a data center liquid-cooled quick connector according to claim 1, characterized in that, The specific operation of step S10 is as follows: a. Connect the quick-connect coupling to the insertion and removal test bench, and adjust the center positions of the male and female connectors to make them be on the same center line; b. Connect the system to the atmosphere and adjust the connector to a fully conductive state under normal pressure. Record the connector position at this time and enter this position into the test position in the equipment parameters. c. With the connector in the conductive state, remove all air bubbles from the liquid-filled container and record the scale value x1, then perform a plugging and unplugging cycle test; d. After looping 1000 times, repeat the above operation and read the scale value x2; e. Subtract the scale value in x2 from x1, and then divide by the number of cycles to get the fluid loss value for each connection.

9. The method for testing the interchangeability and reliability of a data center liquid-cooled quick connector according to claim 1, characterized in that, The specific operation of step S11 is as follows: a. Connect the quick-connect coupling to the insertion and removal test bench, and adjust the center positions of the male and female connectors to make them be on the same center line; b. Connect the system to the atmosphere and adjust the connector to a fully conductive state under normal pressure. Record the connector position at this time and enter this position into the test position in the equipment parameters. c. With the connector in the conductive state, remove all air bubbles from the liquid-filled container and then perform a plug-in / plug-out cycle test; d. After 500 cycles, perform a leakage rate test, maintain for 5 minutes, ensure the pressure decay does not exceed 1%, and record the actual value.

10. The method for testing the interchangeability and reliability of a data center liquid-cooled quick connector according to claim 1, characterized in that, The specific operation of step S12 is as follows: a. Connect the male connector to the pressure output port of the test bench, and connect it with the female connector to allow it to communicate with the atmosphere. Prefill the test pump with water to the male connector under test, and ensure that water flows out to expel air. Plug the tail end of the male and female connectors, and hang a 50N weight at position 10D starting from the male connector end face. Cover with the safety cover, and pressurize to 21 bar at a uniform rate within 1 minute, and maintain the pressure for 5 minutes. Observe whether the pressure gauge reading drops and whether there is any leakage in the connection. b. If the above test is normal, continue to increase the pressure to 80 bar and maintain the pressure for 5 minutes. Observe whether the pressure gauge reading changes and whether there is any leakage at the joint connection. c. Remove the quick connector and visually inspect its surface for any damage. Manually insert and remove the valve 5 times consecutively to observe whether the insertion and removal are smooth and whether the valve core resets normally.

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