Fuel gas watchcase leakage detection device and detection method

Abstract

The invention relates to a fuel gas watchcase leakage detection device and detection method. The fuel gas watchcase leakage detection device and detection method comprise a vacuum air pump, a pump box and transparent casing sealing plates, wherein the vacuum air pump is arranged on the pump box and is communicated with the pump box, the pump box is linked to an external tooth head of the casing in a sealing mode through windpipes and windpipe connectors, rubber plugs are arranged on other corresponding open portions of the casing, and sealing rings are laid on the upper end opening of the casing, and casing sealing plates are arranged on the sealing rings. According to the fuel gas watchcase leakage detection method, moderate soap water is poured into the casing, and the soap water soaks each detection component; the vacuum air pump is opened, and when negative pressure in the casing reaches to the requirement, transparent acrylic plates at the casing opening are used to observe whether bubbles occur in water soap of relevant detection portions.

Description

technical field [0001] The invention relates to an inspection device and method for a gas watch case, in particular, the invention relates to a gas meter case air leakage detection device and a detection method. Background technique [0002] Piped gas / gas is currently the most practical and clean energy, which can be efficiently and conveniently used by households and industries, and is practical and cost-effective. But because gas / gas is colorless, odorless, flammable and explosive gas. During transportation and use, the requirements for leak-proof performance of related pipelines and appliances are very high. [0003] The gas / gas meter is used to measure the actual gas / gas consumption. The gas meter is a precision measuring instrument, and the anti-leakage feature is extremely important. There are 9 components on the upper case of the gas meter that need to be welded or riveted. Due to unavoidable operational reasons in the welding and riveting process, these 9 welding ...

AI Technical Summary

Problems solved by technology

For this detection method, it is extremely difficult to pressurize the product case to a positive pressure of 75,000 pascals in the first test because the external threaded head of the gas meter is not riveted to the case. It is difficult to achieve a good seal at the detection points, so the air pressure in the case often does not meet the required positive pressure requirement of 75,000 Pascals, which affects the test results of the product's air leakage performance, and the test results are difficult to guarantee

In addition, the soapy water applied on the case of the gas meter is easy to volatilize, dry or lose, and cannot achieve the effect of showing air leakage, which may cause misjudgment and cause defective products to flow out

During the second test, the case of the gas meter to be tested must be fixed with a clamp and there should be no serious air leakage. Otherwise, it is easy to cause the internal pressure of the product to not reach the level due to the fact that some positions are not fastened well during the test. Testing requirements

During the test, although the gas meter external pipe head has been riveted on the gas meter case, because the product has been painted, the surface paint of the product is easily caused by the fixing fixture during the product test. The paint on the surface of the case or the body of the case Scratched or damaged deformed

The above factors make the detection efficiency of this method extremely low. Each detection time takes 30 to 40 minutes, and requires the cooperation of 4 to 5 detection personnel to carry out

Moreover, due to the defects of the detection method itself, it is extremely easy to cause the leakage of the product case to flow out.

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