At present, products on various production lines are increasingly used in air tightness testing.Air tightness tester is also called air tightness tester, waterproof tester, waterproof tester, sealing tester and sealing tester.According to different testing methods, the testing methods of air tightness testers currently on the market mainly include the following:

1. Traditional direct pressure air tightness test

The process for direct pressure leak detection is very similar.The operation process of the direct pressure air tightness detector is as follows: inflate the sealed cavity of the workpiece under test under certain pressure conditions and maintain it for a certain period of time, then cut off the connection between the workpiece under test and the air source and record the pressure indication at this time. After a certain period of time,(seconds or tens of seconds)Afterwards, read the pressure indication again and compare it with the pressure indication recorded last time.If there is leakage in the measured chamber, there will be a difference between the two pressure indications.The size of this difference reflects the leakage status of the workpiece during the detection time period. The larger the difference, the more serious the leakage of the workpiece.As long as this difference is within the allowable range, the tested workpiece can be considered qualified.Otherwise, it is deemed unqualified.

2. Traditional differential pressure air tightness test

Differential pressure air tightness testing method: also called the comparison method, it requires a standard leak-free product (or a sealed tank whose internal volume of the workpiece is not much different from the volume of the tested product). Principle: Pour a certain pressure of gas into a sealed product to be tested, and at the same time, pass a gas of the same pressure into a standard product, wait for a period of time, and observe the inside of the standard tank. The difference between the pressure and the pressure in the workpiece is used to determine whether the product is leaking.The detection method of this air tightness detector has high detection accuracy, but is not very versatile and requires two tools. The testing cost is twice as high as that of the pressure drop type, and a standard part is required. If there is a problem with the standard part, the differential pressure air tightness test results will be different, and the standard part needs to be verified regularly.

According to different detection methods, air tightness detectors can be divided into two categories: direct pressure type and differential pressure type.So what is the difference between the two??Both the differential pressure air tightness detector and the direct pressure type use gas as the detection medium. The biggest difference between the two is that the differential pressure type requires standard parts, while the direct pressure type does not require standard parts.The basic working principle of the differential pressure air tightness detector is the same as that of a balance. One end is a reference object.(Standard product), the other end is the part under test(Tested article).However, the measurement sequence is just opposite to that of the balance. The reference object and the workpiece to be measured are filled with air of the same pressure at the same time, so thatbalanceThe differential pressure sensor is balanced on both ends.The air tightness detector will measure the specific leakage of the workpiece based on the change in differential pressure, then determine whether the tested workpiece is qualified, and transmit this information to the operator.Because the standard product and the workpiece being tested have the same shape and size, and the external environmental conditions at both ends are exactly the same during the testing process, this testing method can eliminate the influence of environmental factors such as temperature and vibration and obtain high-precision measurement results.

3. Intelligent air tightness test

Hai Ruisiscience and technologyThe intelligent sealing tester is a new type of high-precision non-destructive testing equipment.It mainly uses compressed air as the medium to apply a certain pressure to the inner cavity or surface of the product to be tested, and then uses a highly sensitive sensor to detect changes in pressure to determine the tightness of the product to be tested.Because it uses compressed air as the medium, there is no secondary pollution to the product, and the detection speed and accuracy are also better than water detection (air molecules are smaller than water molecules, and the leakage speed is fast), somakeIt can be implemented on a large scale in production lines.

At present, traditional sealing testers are divided into direct pressure type, differential pressure type, and flow type according to their sensor types.Traditional direct voltage testers have low precision and poor accuracy;Differential pressure tester has high accuracy but small detection range(Usually only5Kpa), which requires comparison of standard parts and is complicated to implement; to address the above problems, Hirays adopts the latest microchip technology and combines it with the intelligent differential pressure patented algorithm independently developed by Hirays.exist2012The first generation of intelligent testers was developed in 2011, which is comparable to differential pressure testers in terms of accuracy, and is superior to differential pressure testers in terms of stability and cost.

Comparison chart of the advantages and disadvantages of the three testing methods:

Shenzhen Hiraysi Automation Technology Co., Ltd., established in2008is a national high-tech enterprise with decades of development history. It is headquartered in Shenzhen, which is known as the capital of design and the city of innovation.

For ten years, Hirays Technology has been on the road of precipitation and accumulation, creation and innovation of air tightness and waterproof detection technology. In the past ten years, Hirays Technology has provided more than800partners have provided considerate services and have2000The above sets of equipment ensure the airtightness and waterproof function of customer products.

Building a platform for the team, creating value for customers, and allowing givers to share success are the values ​​that Hirays Technology has always adhered to during its growth.

Focus, innovation and value sharing are our business philosophy.Thanks to the team who have been together through thick and thin, and thanks to the customers who have worked hand in hand along the way.

how to get fromMade in China is moving toward intelligent manufacturing in China, and Haris people are exploring and practicing with actions.Chinese brands should not be synonymous with low price and inferior quality; we need China's CRRC and Huawei in every industry. Hirays Technology must become CRRC and Huawei in the professional field of air tightness and waterproof testing. This is the meaning of our persistence and perseverance.

China's brand, the height of the world, is the glory and dream of Hai Ruisi people!It is also a mission that our generation must carry on our shoulders!