Gas meter leak tightness detecting method and device thereof

A sealing detection and gas meter technology, which is applied in measuring devices, testing/calibrating devices, liquid tightness measurement using liquid/vacuum degree, etc. It can solve problems such as easy misjudgment, affecting the quality of gas meters, and large temperature influence

Inactive Publication Date: 2008-09-24
海盐美捷测试仪器有限公司
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Problems solved by technology

[0002] At present, there are two methods for gas meter airtightness detection: one is wet detection, that is, the gas meter is soaked in water for detection. The disadvantage of this detection method is that during the detection process, water may affect the quality of the gas meter
The disadvantage of this detection method is that it is greatly affected by temperature, and it is easy to misjudge

Method used

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  • Gas meter leak tightness detecting method and device thereof
  • Gas meter leak tightness detecting method and device thereof

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Embodiment Construction

[0015] As shown in Figure 1, the airtightness detection device of the gas meter comprises a barrel-shaped airtight container 11, a cylinder 1, a pull rod 2, a cover plate 5, a hanging meter sealing mechanism, an airflow conduit 8 and an airflow detection port 6, and the upper part of the barrel-shaped airtight container 11 is There are three openings (the number of openings can be opened according to the number of meters to be checked once), each opening is welded with a flange ring 10, and the flange ring 10 is provided with an O-shaped sealing ring 9. The lower end of the airtight container 11 is provided with a suction port 12 . The cylinder 1 is arranged above each opening, the cover plate 5 is connected with the piston rod of the cylinder 1 through the connector 4, the cover plate 5 corresponds to the upper and lower positions of the opening of the sealed container 11, and the air flow detection port 6 is arranged at the upper end of the cover plate 5 . The bottom end of...

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Abstract

The invention discloses a gas meter sealing detecting method and a detector thereof. The detector includes a sealed container, a cylinder, a cover plate, a block water sealing mechanism, an air flow guide pipe and an air flow detection opening; during detection, a gas meter to be detected is put into the sealed container; the orifice of the gas meter to be detected is sealed and connected with the air flow detection opening arranged out of the sealed container; and then the sealed container is sealed and pumped vacuum; finally the air flow detection opening observes the pressure changes in the meter, compares with a standard meter and judges the sealing. The invention puts the detected meter into the vacuum sealed container with certain pressure, manufactures a relatively vacuum environment out of the gas meter to be detected to observe the pressure changes in the gas meter, so as to judge the leakage of the detected meter. The invention makes use of the temperature transmission between the vacuum isolated detected meter and the outside environment, so as to reduce the influence of the temperature on the pressure with small temperature influence and high detecting precision, and the quality of the gas meter is not influenced by the detection.

Description

technical field [0001] The invention relates to a method for detecting the airtightness of an instrument and a detection device thereof, in particular to a method and a device for detecting the airtightness of a gas meter. Background technique [0002] At present, there are two methods for gas meter sealing testing: one is wet testing, that is, the gas meter is soaked in water for testing. The disadvantage of this testing method is that during the testing process, water may affect the quality of the gas meter. The other is dry detection, which is to fill the checked meter with a certain pressure of compressed air, and then observe the pressure change in the checked meter through the pressure gauge, so as to judge the degree of leakage of the checked meter. The disadvantage of this detection method is that it is greatly affected by temperature, and it is easy to misjudge. Contents of the invention [0003] The technical problem to be solved by the present invention is to p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M3/26G01F25/00
Inventor 汤有成
Owner 海盐美捷测试仪器有限公司
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