SU1499135A1 - Method of testing articles for air-tightness - Google Patents

Abstract

The invention relates to the monitoring of the tightness of the surfaces of the product and the sealing elements of the aggregates and will improve the reliability of testing products with a leaky volume of leakage by preventing leakage from leaking out of the volume of leakage through the places of leakage. Around product 2, a volume of 1 leakage is created, connected by a tube 8 with a liquid 9. In a volume of 1 leakage, an overpressure is created by blowing out the outside of the leak 7 from a constant gas flow until bubbles appear from the tube 8. The product is filled with a test gas and the change in intensity is measured bubbling, judging by the leakage of the product. 1 il.

Description

one

(21) 4284242 / 25-28

(22) 07.13.87

(46) 07.08.89. Bul № 29 (72) V.L. Gusev and P.S. Ozerov

(53) 620.165.29 (088.8)

(56) USSR Copyright Certificate 877378, cl. G 01 M 3/06, 1980.

(54) METHOD FOR TESTING PRODUCTS FOR TIGHTNESS

(57) The invention relates to the monitoring of the tightness of the surfaces of the product and the sealing elements of the aggregates and will improve the reliability of testing products with untight

the amount of leakage by eliminating leakage of the volume of leakage from the volume of leakage through the places of its leakage. Around the product 2, a volume I of leakage is created, connected by a tube 8 with a liquid 9. In a volume of 1 leakage, an overpressure is created by blowing out the outside of the leak 7 from a constant gas flow until bubbles appear from the tube 8. The product is filled with a test gas and the change in intensity is measured bubbling, judging by the leakage of the product. 1 il.

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The invention relates to a testing technique and can be used to monitor the tightness of the surfaces of products and sealing elements of aggregates,

The aim of the invention is to increase the reliability of testing products with an unpressurized gutter volume to prevent leakage from flowing through the leakage volume.

In the drawing, the circuit diagram of the device for realizing 1;

The device contains a volume of 1 pressure, the surrounding part of the product 2 at the site of control of leakage, the pneumatic remote control 3 is connected via valve 4 to the cavity of product 2 and through the valve 5 with nozzle 6, the latter is directed by the socket to the place of 7 leakage volume 1 flow, which is connected by a tube 8 with a liquid 9,

The method of testing products for hermetic is realized as follows:

A tube 8, connected to the I-natehan product 2, is immersed in a container with liquid 9. From the pneumolal 3 through gas 5 it is blown with gas using a nozzle 6 of the place 7, which does not contain leakage. The gas flow is sent from the nozzle 6 until the bubbles are released from the tube 8. The gas is installed and maintained at a constant flow rate from the nozzle 6 with a uniform extraction of constant intensity bubbles from the tube 8. After that, from the pneumatic console 3, the valve 4 is created in the cavity 2 an overpressure of the control gas 1 and according to the difference in the intensity of the release of bubbles from the tube 8 before and after the creation of an overpressure m-on

Editor O. Yurkovetska

Compiled by L.Vikhl ev Techred M.Didyk

Order 4679/37

Circulation 789

VNII11I State Committee for Inventions and Discoveries at the State Committee on Science and Technology of the USSR 113035, Moscow, Zh-35, 4/5 Raushsk nab.

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The pitch gas in product 2 determines the amount of leakage of the test gas.

The use of the leak test method allows to increase reliability with an unpressurized amount of leakage due to the creation of a gas flow through the place of leakage of the volume of leakage inside. At the same time, the maximum reliability of the tests is ensured when the entire area of the leakage volume leaks out.

Claims (1)

The maximum sensitivity of the tests is achieved with a minimum flow rate of blowing from nozzle 6, sufficient to exclude the escape of gas from the volume of 1 leakage to the outside through unsealed locations 7., Invention Method of testing products for tightness by creating around the product or its part the volume of leakage of the Compound of the latter with a tube, the free end of which is lowered into a liquid, creating an overpressure of gas in the volume of leakage before bubbles appear from the tube, filling the product with a control gas under overpressure and recording the intensity release of gas bubbles from the tube, characterized in that, in order to increase the reliability of the use of products with an untight volume of leakage, the creation of an overpressure in The leakage section is made by blowing out an unsealed area of the volume of external flow by a constant gas flow, the intensity of bubble formation from the tube is measured before the product is filled with the test gas, and the leakage rate of the product is measured by changing the intensity of the outgoing gas bubbles from the tube before and after filling products. Proofreader I. Borisov Subscription