SU1490549A1 - Sampler for gases and aerosols - Google Patents

Abstract

The invention relates to the technique of remote automatic air sampling in the surface layer of the atmosphere and can be used to study the concentration of harmful impurities in the atmosphere by organizations of labor protection and environmental protection. The sampler contains a ball-pilot 14, a collapsing cylindrical chamber of variable volume 1, a locking device controlled by time relay 3, a filter holder 9 for a filter or absorber with a shut-off valve 11, an outlet fitting 12 with a valve. When the set height is reached, the locking device is activated and the sampling chamber through the valve 11 is filled with air. 2 Il.

Description

.It is a technique related to remote automatic air sampling in the surface layer of the atmosphere and can be used to study the concentration of harmful impurities in the atmosphere by labor protection and environmental protection organizations.

The purpose of the invention is to improve performance and increase the reliability of the sampler.

FIG. 1 shows the sampler prior to sampling; in fig. 2 - after sampling.

The sampler consists of a chamber of variable volume 1 cylindrical, with a rigid upper 2 and lower 3 walls and a folding cylindrical wall with annular ribs 4. On the upper wall 2 there is a locking device, including time relay 5, dilator 6 and juice 7 with loop 8, and a fitting with a filter holder 9, a filter or an absorber 10 and a shut-off valve 11, a shut-off fitting 12 with a valve 13 are installed.

The sampler works as follows.

Filter 10 is removed from the filter holder, valve 13 opens, rigid walls 2 and 3 are compressed. Air from the internal cavity of the variable volume chamber is removed through valve 13 (Fig. 1). The cylindrical wall folds over the ribs 4. Wall 3 presses against wall 2;

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The loop 8 through ska 7 is inserted into the breaker 6. In this case, the sampler is reset. Time relay 5 sets the time required to raise the probe to a predetermined height. A filter 10 is installed at the fitting of the filter holder 9, the valve 13 is closed. The sampler is suspended from the ball pilot 14 and rises to a predetermined height. After the set time has elapsed on the relay 5, it triggers and releases the bottom wall 3. The air through the filter is drawn into the chamber of variable volume 1. After the chamber (Fig. 2) is filled, the ball pilot 14 is lowered by cord 16 with the sample taken. A check valve 11 holds the air sample in chamber 1 and prevents the filter from being blown back from the filter.

10 when exposed to wind on the sampler.

Claims (1)

Invention Formula A sampler for gases and aerosols containing a variable volume chamber with rigid upper and lower walls, a ball pilot, a locking device, a shut-off and gas intake fitting, characterized in that, in order to improve performance and increase reliability, the variable volume chamber is made in the form of a cylinder with a folding cylindrical wall and stiffening ribs, the gas-expansion nipple is provided with a check valve and a filter holder, and the locking device is equipped with a time relay and a loop. It  ---. LT 7- 7 fl