CS239551B1

CS239551B1 - Hydrostatic differencial manometer with a scale

Info

Publication number: CS239551B1
Application number: CS829109A
Authority: CS
Inventors: Tomas Skrovanek; Antonin Keprt
Original assignee: Tomas Skrovanek; Antonin Keprt
Priority date: 1982-12-14
Filing date: 1982-12-14
Publication date: 1986-01-16
Also published as: CS910982A1

Abstract

Vynález sa týká hydrostatického tlakomera s váhou s vysokou presnosťou na meranie tlaku plynu. Účelom vynálezu je riešenie tlakomera s meracím systémom v tvare nádržkového kvapalinového tlakomera, ale bez mechanického spojenia nádoby s trubicou. Vlastně meranie tlaku sa uskutočňuje vážením nádoby s tlakomernou kvapalinou, ktorej množstvo v nádobě je úměrné výške hydrostastického stípca a teda meranému tlaku. Změny vztlakovej sily sposobené ponáraním a vynáraním ponořeného konca trubice sa eliminujú zvláštnym usporiadaním trubice, ktorá sa skládá z meracieho valca ponořeného v kvapaline, spojovacej trubice a s meracej nádržky, pričom vonkajší priemer meracieho valca ,a vnútorný priemer meracej nádržky sú shodné. Merací rozsah tlakomera je daný dížkou meracieho valca a meracej nádržky ako aj dížkou spojovacej trubice. Pre umožnenie merania diferenčných tlakov je celý tlakoměr uzavretý v tesnej nádobě.The invention relates to a hydrostatic manometer with a high-precision balance gas pressure. The purpose of the invention is a solution pressure gauge with measuring system in shape tank liquid pressure gauge, but without mechanical connection of the vessel with the tube. In fact, pressure measurement is performed weighing a container with a pressure liquid, whose amount in the container is proportional to the height hydrostastic column and thus measured pressure. Changes in buoyancy caused by dipping and plunging the submerged end the tubes are eliminated by a special arrangement tube consisting of a measuring tube a cylinder immersed in a fluid, bonding tube and with the measuring tank, leaving the outside the diameter of the measuring cylinder, and the inner the diameter of the measuring tank is the same. measuring the range of the pressure gauge is given by the measuring length cylinder and measuring tank as well as length connecting tube. To allow measurement differential pressure is the entire pressure gauge sealed in a tight container.

Description

BACKGROUND OF THE INVENTION The present invention relates to a hydrostatic pressure gauge with a high accuracy balance for measuring gas pressure. It is an object of the invention to provide a pressure gauge with a measuring system in the form of a reservoir fluid pressure gauge, but without mechanical connection of the vessel to the tube. In fact, the pressure measurement is carried out by weighing a pressure fluid container whose amount in the vessel is proportional to the height of the hydrostastic column and thus the pressure measured. The changes in buoyancy caused by dipping and ejecting the submerged end of the tube are eliminated by a particular tube configuration consisting of a liquid immersion measuring tube, a connecting tube and a measuring container, the outer diameter of the measuring tube and the inner diameter of the measuring container being identical. The measuring range of the pressure gauge is determined by the length of the measurement valle and the measuring tank as well as the length of the connecting tube. To allow differential pressure measurements, the entire pressure gauge is closed in a tight container.

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BACKGROUND OF THE INVENTION The present invention relates to a hydrostatic differential pressure gauge comprising a hydrostatic measuring system, a top pan weight, a sealing fluid container, and a tight housing. The pressure measurement is based on weighing the amount of sealing liquid in the container on the balance pan, this amount being proportional to the measured pressure depending on the characteristic dimension of the measuring system.

Differential pressure gauges known to date use a deformation element (grapevine, membrane and p.) As a sensitive element, whereby the force exerted by the pressure is measured by weight. A disadvantage of this solution is the use of a deformation element, the material of which exhibits adequate stiffness, permanent deformation and time instability, which prevents the achievement of a higher pressure measurement accuracy.

The above-mentioned drawbacks are eliminated by the hydrostatic differential pressure gauge of the present invention. The essence of the invention is that the pressure gauge uses a hydrostatic measuring system consisting of a measuring tank and a measuring cylinder having the same diameters, thereby eliminating the effect of the buoyancy change when changing the level of the sealing liquid. The measuring cylinder extends into the container with the sealing liquid and is placed on the weighing pan. The container and the measuring system are partially filled with sealing fluid. The measured pressure acts on the level of the sealing liquid and is transferred to the measuring system by its action. The change in the amount of sealing liquid in the container is measured by means of a balance and is proportional to the measured pressure.

The use of a hydrostatic measuring system as a sensitive pressure gauge element makes it possible to achieve a higher pressure measurement accuracy and ensures the stability of the pressure gauge data. The solution requires the use of a balance with a top tray of conventional design.

The hydrostatic differential pressure gauge of the invention is illustrated in the accompanying drawing. The pressure gauge consists of a hydrostatic measuring system made up of a measuring tank 1 and a measuring cylinder 2 which are connected to each other by a pipe 9. The measuring system is mounted vertically on the upper part of the tight box 8 so that the measuring cylinder 2 extends into the container 3 placed on the weighing pan 5. The container 3 is connected via a channel in the measuring cylinder 2 and the tube 9 with the measuring tank 1 and this space is filled with sealing liquid 4. The sealing box 8 with the weight 5 has adjusting screws for adjusting the pressure gauge to the working position and located at the top pressure gauge 6. A reference pressure adapter 7 is located on the upper part of the measuring tank 1.

The pressure measurement of the hydrostatic pressure gauge is carried out such that the measured pressure is fed through the nozzle 6 into a tight housing 8 where it acts on the level of the sealing liquid 4 and this is partially transferred to the measuring system. The loss of sealing liquid is measured by the weight, which is proportional to the measured pressure. The measuring range of the pressure gauge is given by the height of the reservoir 1 and the measuring cylinder 2, the lower limit of the measuring range being given by the length of the connecting tube 9. Above the level of the sealing liquid 4 in the measuring reservoir 1 is the reference pressure which can be supplied by the reference pressure adapter 7. can be determined during calibration.

Claims

SUBJECT

Hydrostatic differential pressure gauge with a balance consisting of a hydrostatic measuring system, a balance, a sealing liquid container and a tight housing, characterized in that the measuring system is made up of a measuring tank (1j and a measuring cylinder (2), the internal diameter of the measuring tank (1j)

OF THE INVENTION and the outside diameter of the measuring cylinder (2) are the same and that this system is mounted vertically on top of the tight housing (8j), the measuring cylinder (2) extending into the container (3) stored on the weighing pan (5) and the measuring system and container (3) are partially filled with sealing liquid (4).