| After-sales Service: | Available |
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| Warranty: | 1 Year |
| Certification: | Calibration Certificate(Cost Additional) |
| Supply Ability: | 1 Set Per Month |
| Gas: | 5% Hydrogen and 95% Nitrogen |
| Power Requirement: | 220V AC Power Supply |
| Customization: |
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Introduction to products
A four-tank hydrogen nitrogen leak detection system is a device used to detect gas leaks in automotive parts or other equipment. It usually consists of four sealed test boxes and corresponding detection devices. When in use, put the parts to be tested into the test box, and then detect whether there is a gas leak by injecting hydrogen and nitrogen gas mixture.
This leak detection system uses a mixture of hydrogen and nitrogen gas as the detection medium because hydrogen is extremely permeable, making it easier to detect small leaks. The gas in the test chamber will interact with the leak point on the surface of the component to be tested, and if there is a leak, the gas will be detected by the detection device.
According to the basic leak detection principle of hydrogen and nitrogen, hydrogen and nitrogen are used as tracer gas to fill the workpiece in a vacuum chamber. Then, the hydrogen and nitrogen leak detector can quickly and accurately determine the leakage situation of the workpiece with high accuracy.
Working process
1. Workpiece installation and vacuum box closing:
a. The operator places the workpiece into the vacuum chamber, connects the workpiece interface with the quick connector inside the vacuum chamber, and presses the start button.
b. Automatically close the vacuum chamber, and the detection cycle begins immediately.
Note: Grating protectors are installed on both sides of the vacuum chamber. When closing the vacuum chamber door, ensure that there are no objects interfering with the movement of the vacuum chamber in the closing area.
2. Vacuum chamber vacuuming and workpiece vacuuming:
a. Automatically vacuum the vacuum chamber until the vacuum level inside reaches the set opening pressure.
b. At the same time, automatically vacuum the workpiece until the vacuum level inside the workpiece reaches the set vacuum value.
3. Workpiece hydrogen nitrogen filling, medium leakage, and fine leakage detection
a. Automatically fill the workpiece with hydrogen and nitrogen gas at the set pressure until the pressure inside the workpiece reaches the set value.
b. Medium leakage detection: After the completion of hydrogen and nitrogen filling, the workpiece is automatically maintained under pressure, and whether there is medium leakage is determined based on the pressure drop value inside the workpiece:
If the pressure drop value inside the workpiece exceeds the set range, the leak detection process will be terminated, and the operation interface will indicate medium leakage and recover the gas.
c. After the completion of medium leakage, perform micro leakage judgment:
If the leak detector detects a hydrogen and nitrogen signal exceeding the set value in the vacuum chamber, it indicates that there is fine leakage in the workpiece, and a fine leakage indication signal is provided on the operation interface.
If the leak detector does not detect hydrogen and nitrogen signals exceeding the set value in the vacuum chamber, it indicates that the workpiece has passed the inspection, and a qualified signal is provided on the operation interface.
4. Vacuum chamber inflation
a. Automatically fill the vacuum chamber with atmosphere.
b. At the same time, the hydrogen and nitrogen inside the workpiece are automatically recovered.
5. Workpiece unloading
a. If the test is qualified:
The vacuum chamber door automatically opens. The operator disengages the joint inside the chamber from the workpiece interface.
b. If the test fails:
Press the confirm button manually and the vacuum chamber door will automatically open. The operator disengages the joint inside the box from the workpiece interface.
c. If an alarm occurs during the detection process:
Manually press the confirmation button. The vacuum chamber door automatically opens. Press the fault message prompt on the touch screen to clear the alarm status, and then retest the workpiece.
Note: For sorting products with leakage detected: 1. Take out one workpiece and leave one workpiece. 2. Continue testing one workpiece left in the chamber according to the normal operating method. This cycle continues until a specific leaking workpiece is detected.
Parameters
| Model | HJ118 |
| Workpiece to be inspected | Automobile air conditioning compressor |
| Vacuum chamber size | 400mm long * 450mm high * 300mm deep |
| Number of vacuum chambers | 4 pieces (each chamber can hold up to 2 workpieces, with 4 tubes inside) |
| Fine leakage detection gas | Hydrogen and nitrogen |
| Indicating hydrogen and nitrogen leakage pressure | 3.0Mpa (adjustable downwards) |
| Alarm leakage rate | 8g/year (adjustable alarm leakage rate) |
| Cycle time | 180 chambers/hour |
| Equipment maintenance alarm | Display the usage frequency of main accessories on the touch screen and remind the user of the time point for replacing parts |
| Run time | Must be able to work continuously for 24 hours and ensure the stability of self testing |
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