RU1777015C - Method of checking insulating suits for tightness - Google Patents

Abstract

Usage: testing insulating suits for the action of liquid and gaseous aggressive media. SUMMARY OF THE INVENTION: an insulating suit is placed in a test chamber, an autonomous micro-compressor 1 with air ducts 2 is connected inside the suit, connected to a control unit 3 with a time meter and to a reactive cell 4. The latter consists of a hollow cylinder 5 with a porous glass partition 6 coated with it indicator. Air is taken from the undersuit space with air ducts 2 located in all its dead-end zones. The selected air is supplied to the indicator through a tube 7 located in the cylinder 5 along its axis. The optical system 8 for controlling the color change of the indicator provides a signal to the control unit 3, which stops the microcompressor 1 and fixes the permeability time. 2 C.p. f-ly, 2 ill. (L C vi h § SL

Description

Figs

The invention relates to the field of testing the tightness of insulating suits to the action of liquid and gaseous aggressive environments and can be used for laboratory and field tests in organizations involved in the creation of these products, as well as in chemical and other industries during the control tests.

A known method for monitoring the tightness of closed products, namely, that a product with a UIZD volume is placed in a chamber of volume V and the presence of test gas in it is tested for tightness, the control chamber being connected to an additional chamber of volume VA, the value of which is determined from (0.1-0.2XVK - / ed), connected to the probe gas detection sensor, create a vacuum in the additional chamber by increasing this volume by a value of V, determined from the ratio V (5-10) / d, bypass gas from the control cameras about optional, and then isolate into an additional chamber from the control and increase the pressure of the test gas by reducing the volume Vfl.

This method does not allow to determine the time of the protective action of the insulating suit, since the operations described in the method can be performed only after the exposure time of the product in a trial aggressive environment. In addition, the supply of aggressive media inside the product will lead to the destruction of the suit.

The closest in technical essence and the achieved result to the claimed is a method for determining the tightness of insulating suits, which consists in placing it in a test chamber, subjected to continuous exposure to aggressive environment with simultaneous air sampling of the space for analysis on the indicator and determining the moment of leakage due to a change in the indicator color.

The disadvantages of this method are:

- air sampling of the undersuit space to the indicator located outside the insulating suit requires additional holes in it, which can lead to leaks at the points of connection of the air intake pipes, which in turn reduces the accuracy and reliability of the control;

- when taking air from the undersuit space at one point in the area of the sleeves and boots due to the lack of mixing, stagnant zones are formed, which also reduces the accuracy and reliability of the control. The aim of the invention is to increase the accuracy and reliability of control.

This goal is achieved by the fact that in the known method for determining the tightness of insulating suits, which consists in the fact that it is subjected

Continuous exposure to the test environment with simultaneous sampling of the air of the suit space for analysis on the indicator and determine the moment of leakage by changing the color of the indicator 5, according to the invention, air is taken simultaneously from all the dead ends of the space of the suit, while the flow of action is carried out through the tube ; hosted

0 along the axis of the hollow cylinder on the indicator deposited on a porous glass partition placed in the same cylinder. The indicator and sampling tools are placed in a suit space.

5 Fig. 1 shows a diagram of a device,

implementing a method for determining the tightness of insulating suits; Fig. 2 is a schematic diagram of an arrangement of a device in a suit space.

0 A device that implements a method for determining the tightness of insulating suits contains an air intake mechanism, including an autonomous microcompressor 1 with air ducts 2, connected to a control unit 3 with a time meter and a reactive cell 4, consisting of a hollow cylinder 5 with a porous glass partition b and an air supply a connecting tube 7 mounted along the axis of cylinder 5. In the reactive cell 4, an optical system 8 for controlling the color change of the indicator is connected to the control unit 3.

The method is carried out as follows.

An insulating suit 9 is put on the frame in the test chamber 10, a leak testing device is installed inside the suit, and placed

0 the ends of the air intake tubes 2 in the dead-end zones of the undersuit space, seal the suit 9, act on it with a test environment with the simultaneous inclusion of the microcompressor 1 and

5 of control unit 3. When the test medium enters the undersuit space, the indicator applied to the partition 6 changes color, as a result of which the signal goes to the control unit 3, the microcompressor stops and

time meter, fixing the time of permeability.

Simultaneous air extraction from all dead-end zones of the undersuit space allows mixing 5 of the air, thereby avoiding the formation of stagnant zones. Placing the indicator and the sampling means in the undersuit space eliminates the need for additional holes and their 10 sealing, i.e. eliminates secondary sources of leakage. Using an indicator deposited on a porous glass partition placed in a hollow cylinder and supplying air 15 through a tube placed in the same cylinder along its axis provides a reaction on a small surface area of the plate when a large volume of air is supplied, thereby increasing - 20 reliability and reliability of determination.

PRI me R 1. A 0.22% solution of potassium iodate in sulfuric acid (pl. 1.84 g / cm3) is applied to the partition b, the device is placed inside the suit 9, placed in a test chamber 10 and act on the suit 9 with benzene for 3600 s. After that, the suit 9 is degassed, removed from the chamber 10, removed from the frame and the time of penetration of benzene is determined by the time meter.

Example 2, Isolation suit 9 is exposed to xylene. As an indicator, a 0.04% solution of paraformaldehyde in sulfuric acid (pl. 1.84 g / cm3) is applied to septum 6. The remaining operations are performed as in example 1.

Claims (3)

1. The method of determining the tightness of insulating suits, which is. that it is exposed to the test environment from the outside, air is taken from the suit space, it is fed to the indicator and the moment of leakage is determined by the color change of the indicator, characterized in that. in order to increase accuracy and reliability, air sampling is carried out simultaneously from all dead-end zones of the undersuit space. 2. The method according to claim 1, from the list with the fact that the indicator and sampling means are placed in the undersuit space. 3. The method according to claims 1 and 2, characterized in that an indicator is applied on a porous glass partition placed in the hollow cylinder, and air is supplied through a tube placed in the cylinder along its axis. /////////// /// Editor M. Kuznetsova FCG and Compiled by E. Bovkun Tehred M. Morgenthal about //////// Proofreader E. Lonchakova