SU1368726A1 - Humidity content indicator - Google Patents

Abstract

The invention relates to devices for controlling the drying of air in air-drying installations, for example, used to protect the insulation of power transformers from moisture during the assembly process. The purpose of the invention is to increase the efficiency of control in the process of changing humidity. In order to achieve this goal, the sensitive element 6 of the indicator is divided into two halves so that one half of it is free, placed in the volume of chamber 4 and washed from all sides by the analyzed medium, and the other half of the sensitive element is pressed to the stand 5 by the latch 7. At the same time performed with tabs that restrict access to the analyzed environment. The support in the area of the sensor element abutment is made spherical, and the section of the sensor element has arches. The analyzed medium enters the inlet 2, fills the chamber 4 and exits through the next opening 3. Water from the analyzed medium is adsorbed (absorbed) by the sensitive element 6, the first and second halves, and since the rate of adsorption (desorption) depends on the access of the analyzed medium, that half of the sensitive element, which blinks with the analyzed medium from all sides, is saturated with moisture more quickly and more quickly than the second half, changes its color. Observing through the viewing glass 8 an assessment of the change in the humidity process, it is possible to make a comparison of the color of one half of the sensitive element with the other, having different reaction rates to changes in the humidity of the analyzed medium. 1 hp f-ly, 3 ill. with: (L with O) oo to o

Description

one

The invention relates to indicator devices for monitoring and evaluating moisture in liquid and gas environments and is intended to control the humidity of the working environment of refrigeration machines and to evaluate and control the operation of air-drying units, for example, to control air drying in air-drying installations used to protect insulation transformers from humidification during assembly.

The aim of the invention is to increase the efficiency of monitoring in a npoftec changes in the humidity of the analyzed medium by reducing the measurement time.

Figure 1 is a moisture indicator,

general form; figure 2 is the same, top view; Fig. 3 shows a stand with a rectangular sensing element mounted on it in the protrusions of the latch, a slit.

The humidity indicator comprises a housing 1 having an inlet 2, an outlet 3, chambers 4. A support 5 is installed in the chamber 4 for fixing a rectangular sensing element 6 on it, which is dispersed on the basis of filter paper impregnated with salt (or salts) of metal able to change color depending on or humidity. The rectangular sensing element 6 is mounted on the stand 5 by the latch 1 so that one half of it is free and washed from all sides by the analyzed medium, and the second half is pressed to the stand 5 by the latch 7. Access of the analyzed medium to the second half of the sensitive element is carried out only on one side , from the side of the sight glass 8 and other sides of the access is limited to the stand 5 and the latch 7 having protrusions. In order to impart mechanical strength to the free half of the sensitive element 6, the stand 5 at the point of contact of the sensitive element is spherical, i.e. rounded off when mounting the sensing element 6 on the stand 5, it acquires the shape of an arch, which has a greater mechanical resistance to the dynamic effects of the analyzed medium than the shape of the sheet.

To seal the chamber 4 from the ambient air, the sight glass 8 and the housing 1 installs into the groove

68726

with a gasket 9. The glass 8 is pressed against the housing 1 through the gasket 9 with a cap nut 10.

5 The humidity indicator works as follows.

The analyzed medium enters the inlet 2, fills the chamber 4, and exits through the opening 3. A10 and a medium being adsorbed are adsorbed (absorbed) by the sensitive

element 6 and the first and second halves, and since the rate of adsorption (desorption) depends on the access of the ana lysed medium, half of the sensitive element washed by the analyzed medium from all sides is faster (looses) with moisture and faster than the second half, em

20 its color.

Observing through the viewing glass 8 an assessment of the change in the humidity process, a comparison can be made by the color of one half of

25 on the other hand, with different speeds of reaction to changes in the humidity of the analyzed medium, and the speed of response and changes in the humidity of half of the sensitive element with limited access of the medium depends on the gap between the glass and the latch tabs.

Thus, it is possible to unambiguously evaluate the process of changing the humidity of the analyzed medium.

The humidity indicator provides an assessment of the process of changing humidity, in particular air in air-drying installations, used to protect the insulation of power transformers from moisture during the assembly process.

36

Claims (2)

1. A humidity indicator, comprising a housing with inlet and outlet openings, a chamber installed inside the housing and comprising a stand with a fixed sensing element fixed by means of a latch and a viewing window with a sealing gasket, characterized in that in the process of changing the moisture content of the analyzed medium by reducing the time of the test, the sensitive element is divided into two halves, one of which is pressed to the stand with its lower side, and the latch Nena with protrusions covering a side surface of the half of the sensor element. 2. The indicator according to claim 1, that is, so that, with increased reliability due to the mechanical strength of the free half of the sensing element, the stand in place of the sensing element adjacent to it is made convex, and the adjacent surface of the sensing element repeats the shape of the stand. FIG.