SU1295246A1 - Contactless probe of leak detector - Google Patents

Abstract

The invention relates to a technique for testing leak tightness of products and improves the sensitivity and reliability of leak testing and simplifies the design of the probe. The probe body 1 with the working surface 2 moves along the controlled joint 9 at a distance of 5 to 10 m. In the absence of leaks, the laminar air jet of the power nozzle 4 through the groove 6 completely enters the receiving channel 7, from where it enters through channel 5 to exhaust air to the turbulent to the amplifier. In the presence of a leak, the air stream acts on the laminar jet of the power nozzle 4 in the cavity of the groove 6, it is turbulized and the pressure in the receiving channel 7 instantaneously takes on a zero value, a signal to the turbulent amplifier is not received, a pneumatic signal appears that is converted into a light signal. 1 il. W (L with to (UD SP KS 4;

Description

The invention relates to a technique for testing leaktightness of products, relates to means for detecting leaks in products containing test gas under pressure, and can be widely used in various fields of technology, including shipbuilding.

The purpose of the invention is to increase the sensitivity and reliability of monitoring the tightness of test products in the turbulent and laminar ranges of gas outflow, as well as to simplify the design.

The drawing shows a diagram of the proposed device, the section.

The contactless leak detector probe comprises a housing 1 with a working surface 2, a channel 3 of the outlet nozzle 4 of the power supply and a channel 5 for exhausting air. A groove 6 is made in the working surface 2 of the housing to turbulent a laminar air jet from the channel 3 of the outlet nozzle 4 of the power supply; the channel 7 serves to divert air from the nozzle 4 of the power supply.

The output nozzle 4 and the channel 7 for venting air from the power nozzle 4 are located on opposite sides of the groove 6 of the working surface 2 coaxially with each other, which provides for the turbulization of the air laminar jet.

In the drawing, thermal density 8 of the controlled compound 9 is shown.

Probe works as follows. During testing of compounds 9 under pressure P, (on sample P 500 Pa), the finder leakage probe by the working surface 2 of housing 1 moves along the controlled joint 9 at a distance of 5-103 m.

Editor A, Shandor Order 610/48

Compiled by S. Mapkevich

Tehred M. KhodanychKorrektor M, Samborska

Circulation 777 Subscription

VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab ,, d.4 / 5

Production and printing company, Uzhgorod, Projecto st., 4

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If there are no leaks, the laminar jet from the feed nozzle 4 through the groove

6 completely enters the channel 7, from where it is channeled to the turbulent amplifier P by the kangshu 5 of the air outlet, amplified to 350 Pa. This continues until the groove 6 coincides with the stream, resulting from the leakage 8 of the test compound 9.

In this case, the air stream, acting on the laminar jet of the feed nozzle 4 in the cavity of the groove 6, will turbulize it. Then the pressure in the channel

7 instantaneously takes a zero value. There is no signal to the turbulent amplifier, and a pneumatic signal appears at the output of the turbulent amplifier, which is converted to a light signal, indicating a leakage.

The operation of the leak detector probe is based on the principle of the turbulence of the air laminar jet from the impact of a gas flow on it resulting from a leakage, a controlled product in the event of a depressurization.

The leak detector works from the compressed air shop line.

Claims (1)

Invention Formula A contactless leak detector probe, comprising a housing with a working surface, coaxially with a feed outlet nozzle channel and a gas exhaust passage, characterized in that, in order to increase sensitivity, reliability and simplify the design, a groove is made in the housing surface, the gas exhaust ducts are located on opposite sides of the groove coaxially with each other.