Leakage-amount-adjustable leakage hole based on laminar flow principle

Abstract

The invention discloses a leakage-amount-adjustable leakage hole based on a laminar flow principle. The leakage hole comprises an air inlet connector, an air inlet cover, an air outlet cover, a flow limiting sleeve and a flow limiting rod. The air inlet connector is fixedly connected and hermetically mounted on the air inlet cover, and a filter element is arranged in the air inlet connector; the flow limiting sleeve is connected and mounted between the air inlet cover and the air outlet cover; the flow limiting rod is arranged in the flow limiting sleeve in a clearance fit manner; an air inlet hole is formed in the flow limiting rod; the air outlet cover is provided with an annular anti-falling groove and an adjusting nut, the indicating cap is also arranged and sleeves the outer end of the adjusting nut, and the indicating cap is integrally and fixedly connected with the flow limiting rod through a fixing screw. The leakage flow can be adjusted by adjusting the coincidence length between the flow limiting rod and the flow limiting sleeve, the leakage flow can also be increased in a multiple relation by increasing or decreasing the number of the flow dividing holes and the sealing grooves, the flow adjusting range is large, meanwhile, the leakage hole obtains different flows according to the laminar flow principle, the formed flow is stable, and the method is suitable for manufacturing leakage holes with different flows in small batches.

Description

technical field [0001] The invention relates to the technical field of standard leaks used for gas leakage inspection and calibration, in particular to a leak adjustable leak hole based on the principle of laminar flow. Background technique [0002] Based on the development of science and technology and the advancement of industrial automation, the sealing detection requirements of sealed containers have received more and more attention from various application fields. How to determine the standard of leakage flow rate under pressure and per unit time, how to determine the relationship between the two, the standard leak hole is a necessary tool for the conversion between the two. Generally, customers in different application fields require different leakage flow rates from leak holes, ranging from tens of milliliters / hour to several liters / minute. On the other hand, whether it is a dry seal testing instrument based on the principle of pressure detection, hydrogen detection ...

AI Technical Summary

Problems solved by technology

[0006] Anhui Zhongke Intelligent High-Tech Co., Ltd. applied for the invention patent ZL201010508517.3 in 2010 - an adjustable gas flow meter. The device can adjust the flow rate online within a certain range. If it is too large, the only way to meet the requirements is to replace the internal spool and further adjust the gap between the valve body and the spool.

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