RU2045749C1 - Float of level gauge for tanks subject to high pressure - Google Patents

Abstract

FIELD: measurement technology. SUBSTANCE: float is installed in tank 6 and is composed of case 1 manufactured in the form of sleeve on which bottom ring magnet 2 is positioned. Drain pipe 3 passes through case. Its lower tip is placed into ring hole 4 of magnet and its upper tip is brought out beyond limits of case, is tightly coupled to edges of case and protected by cap 5 against dirt and condensate. Excess of gas goes out of float, drives condensate accumulated on bottom and escapes through drain pipe, that is process of condensate removal takes place automatically. EFFECT: increased measurement precision. 1 dwg

Description

 The invention relates to measuring equipment and can be used to determine the level of liquid in pressure vessels.

Known float, made in the form of a thin-walled body, the inner cavity of which is communicated by a connecting tube with the super-fluid space of the tank [1]
A significant drawback of this design is due to the accumulation of condensate of the working fluid inside it during operation, in this regard, without periodic removal of condensate from the internal cavity of the float, it is impossible to obtain accurate data on the level of liquid in the vessel.

 The closest in terms of design features and the achieved result is a level gauge float for tanks under high pressure, made in the form of a thin-walled body, the inner cavity of which is connected by a connecting pipe with the nadzhikostnom space of the tank [2] The float is made with an open bottom, in the opening of which a connecting a tube.

 The main significant drawback of the float under consideration is the change in its buoyancy, since the float communicates with the liquid phase through an opening from below and, when the level rises, it is significantly filled with liquid. In addition, to determine the liquid level, the level gauge design provides for the presence of two floats, one of which fixes the upper and the second lower level and does not allow to determine the intermediate level, especially in conditions of a large pressure drop (40 atm). The design drawback is also the ingress of dirt onto the walls of the float through the open bottom, which also affects the accuracy of determining the liquid level.

 The technical result of the invention increases the accuracy of measurements by eliminating the accumulation of condensate and dirt in the float.

 The specified technical result is achieved by the fact that in the float of the level gauge for tanks under high pressure, made in the form of a thin-walled body, the inner cavity of which is communicated by a drain pipe with a super-liquid space of the tank, the body is made in the form of a glass, at the bottom of which there is an annular magnet, and a drain the pipe is installed inside the housing, and its lower end is placed on the bottom of the housing, and the upper one is hermetically fixed in the upper part of the housing, removed outside the housing and provided with a protective ring pack.

 The drawing shows a float, General view.

 The float of the level gauge contains a thin-walled casing 1, made in the form of a glass, at the bottom of which an annular magnet 2 is installed. A drain pipe 3 passes through the entire casing, the lower end of which is placed in the annular hole 4 of the magnet near the bottom of the casing, and the upper end is out of the casing and hermetically connected to the upper edges of the housing. The upper end of the drainage pipe is protected by cap 5 against ingress of dirt and condensate. 6 indicates a reservoir in communication with a controlled pressure vessel.

 The float works as follows.

 The float is installed in a tubular reservoir 6 in communication with the controlled vessel, on which magnetically controlled contacts of the reed switch (not shown) are fixed at certain controlled levels. The float is at a height corresponding to the working level of the liquid in the vessel and has a pressure inside equal to the pressure in the tubular reservoir. The internal cavity of the float is constantly connected by a drainage pipe 3 with the supra-fluid space of the tank 6, which makes the float sufficiently thin-walled with maximum buoyancy.

 The float can operate over the entire range of heights of the tubular reservoir.

 As the liquid level rises, the pressure in the vessel and inside the float increases. As the liquid level decreases, the pressure decreases accordingly. Excess gas, leaving the float through the drain pipe 3, first squeezes the condensate accumulated at the bottom of the float. Thus, the process of condensate removal from the float occurs automatically with each cycle and the buoyancy of the float remains constant.

 An annular magnet 2, with its magnetic field passing through the walls of the float and the reservoir, acts on the reed switches and, through a special electrical circuit, controls the level of the working fluid in the vessel.

 The execution of the case in the form of a thin-walled glass and the placement of an annular magnet in it provides the possibility of a magnetic field acting on the reed switches through a special electrical circuit that allows you to control the level of the working fluid in the tank, while maintaining the buoyancy of the float and eliminating the ingress of dirt.

 Placing the lower end of the tube drainage at the bottom of the float body allows you to connect the inner cavity of the float with the super-fluid space of the vessel and make the float thin-walled, while ensuring maximum buoyancy.

 The installation of a protective cap on the end of the drainage pipe removed from the body of the float prevents dirt from entering the float from the vessel walls.

 The proposed design of the float provides the ability to use one float on multi-level gauges to monitor the liquid level.

Claims (1)

 LEVEL FLOAT FOR RESERVOIRS UNDER HIGH PRESSURE, made in the form of a thin-walled body, the internal cavity of which is communicated by a drain pipe with a super-fluid space of the tank, characterized in that the body is made in the form of a glass, on the bottom of which there is an annular tube, and the drain moreover, its lower end is placed on the bottom of the housing, and the upper is hermetically fixed in the upper part of the housing, is removed from the housing and is equipped with a protective cap.