RU25934U1 - ROTAMETER - Google Patents

Description

The invention relates to devices for measuring the flow of liquid or gas with a tube having a channel with a variable cross section and a float located in this channel.

Known flowmeter unit / 1 / made of a transparent material having an elongated body with a conical axial hole in which the float is located.

Transparent materials for rotameter cases come in glass or plastic.

Known rotameters with glass measuring tubes series 10A1187 / 10A1190. The position of the suspended body in a conical glass measuring tube is proportional to the flow rate of the liquid (gas). Data is taken on a scale printed on the measuring tube 121,

The disadvantage of rotameters with glass measuring tubes is that glass is a brittle material, as a result of which the tube must be protected by some kind of casing, which makes the device cumbersome, and the manufacture of a glass tube for a rotameter is very time-consuming and expensive.

Known rotameter measuring tube which is made of transparent plastic, while the tube has only one polished face on which the markings are applied, while the rest of the outer surface of the tube is left matte / 3 /

The applied material — plexiglass — is sheet, therefore, this design is limited either by the size of the diameter of the tube, or by using a complex technological process.

A known flow meter used in high pressure and vacuum conditions, containing a solid molded plastic housing with a tube in which the float / 4 /.

The disadvantage of this design is that when casting there are inconsistencies, internal voids, therefore, additional machining is needed.

Known rotameter containing a conical tube of borosilicate glass, a spherical float made of stainless steel and fittings for connection to the pipeline. The conical tube is enclosed in a shell made of a transparent material - acrylic / 5 /.

Known flowmeter equipped with a measuring glass tube. The measuring tube is connected to a mechanically strong shell tightly enclosing it and provided with fittings at the ends for hermetically connecting the specified tube to the pipeline / 6 /

The disadvantages of these designs is a rather complex process.

The closest analogue to the proposed invention is / 3 /, the measuring tube of which is made of plastic - plexiglass.

The disadvantage of this invention is that plexiglass was produced in sheets, which made it possible to make a tube with only a small diameter, or to form a tube at high temperature by welding. Creating a calibrated tube in this way is quite difficult.

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- 3 in RUSSIA tubes with a large diameter for rotameters are still made of glass. It is very difficult to get a large tube.

The aim of the proposed invention is to increase the range and simplify the process.

This goal is achieved by the fact that in the rotameter the tube made of transparent plastic has at least two flat polished faces lying relative to each other, and organic block glass is used as plastic.

New and significant in this invention is that the tube is made of organic block glass, which makes it possible to perform a rotameter tube by machining not

resorting to complex technological operations.

The alleged invention is shown in figura 1 and 2. Figure 1 - General view of the rotameter; figure 2 is a cross section AA of figure 1.

The rotameter contains a conical tube 1 made of organic block glass, equipped with a flap 2 for visual counting of the fluid flow, installed using flanges 3 and 4. A float 5 is placed in the inner cavity of the tube 1. The rotameter is equipped with limiters 6 and 7 of the float stroke. Tube 1 has two polished faces 8 and 9. They are necessary for the passage of light through them.

Rotameter works as follows.

When the measured medium moves from the inlet upward along the tube 1, the float 2, under the influence of m pressure, rises to a certain height corresponding to a certain flow rate of the measured medium in accordance with flake 3. At this elevation, the equilibrium position of the float remains

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- 4 championships of the gravity of the float and the forces of the impact of the flow on it. Thanks to two flat polished faces lying relative to each other, the float clearly stands out.

LITERATURE:

1.US Patent No. 5373746 dated 02/11/93.

2. (KR VTsP) Transfer no. Kn-04707 of 05.25.87. Rotameters of the 10A1187 / 10A1190 series: Operating Instructions. 3.A.SSSSR No. 82797 dated 06/30/47. 4. Application 6B No. 2163857, G 01 F 1/22. 5. US patent No. 3768309 from 04/28/72. 6. Application of Germany No 2313314 publ. 13.10.77g. Author: Kh-A.V. Kamyshev

Claims (1)

A rotameter comprising a tube made of transparent plastic having at least one flat polished face and a float, characterized in that organic block glass is used as the plastic, and the tube has at least one more polished flat, opposite relative to the first side.