SU926535A1

SU926535A1 - Float-type device for measuring liquid level in high-pressure vessels

Info

Publication number: SU926535A1
Application number: SU802985594A
Authority: SU
Inventors: Лев Петрович Журавлев
Original assignee: Куйбышевское специальное конструкторское бюро Научно-производственного объединения "Нефтехимавтоматика"
Priority date: 1980-09-18
Filing date: 1980-09-18
Publication date: 1982-05-07

Description

Изобретение относится к приборостроению и может быть использовано для измерения уровня жидкости, в сосудах, работающих под высоким давлением..The invention relates to instrumentation and can be used to measure the liquid level in vessels operating under high pressure ..

Известны устройства, содержащие полый корпус с отводной трубкой, при этом корпус и отводная трубка снабже^--.' ны соответственно выходным и выходным воздушными клапанами [1] .Known devices comprising a hollow body with a branch pipe, while the body and the branch pipe supply ^- -. ' They are respectively outlet and outlet air valves [1].

Недостатком устройства является: недостаточная надежность, вызванная тем, что выброс скопившегося в нижней части поплавка конденсата происходит ₁₅только при значительной разности давлений внутри и снаружи поплавка, так как для полного выброса кондесата давление внутри поплавка должно быть больше наружного на величину проти- _мводавления выпускного клапана и величину гидростатического давления жидкости в отводной трубке на полную высоту поплавка.A disadvantage of the device is: insufficient reliability due to the fact that the release of accumulated condensate in the lower part of the float ₁₅ occurs only at a significant difference of pressures inside and outside of the float, since the complete ejection kondesata pressure within the float must be greater than the amount of external proti- _m vodavleniya outlet valve and the hydrostatic pressure of the liquid in the outlet pipe to the full height of the float.

Наиболее близким по технической сущности к предлагаемому является поплавковое устройство, содержащее полый корпус, внутри которого расположено дренажное устройство, выполненное в виде двух трубок, нижний конец одной из которых установлен в отверстии, выполненном на дне корпуса, а нижний конец другой трубки расположен выше дна корпуса [2].The closest in technical essence to the proposed one is a float device containing a hollow body, inside which there is a drainage device made in the form of two tubes, the lower end of one of which is installed in the hole made at the bottom of the body, and the lower end of the other tube is located above the bottom of the body [2].

Однако устройство не обладает достаточной надежностью из-за наличия в нем входного клапана, который вызывает сложность при его настройке и необходимость полной герметичности при его закрытии. Так если этот клапан будет настроен на перепад давления, больший веса гидростатического столба жидкости, соответствующего высоте сливной трубки выше уровня погружения, то при повышении давления внутри емкости внутрь поплавка бу дет поступать не газ, а жидкость, в результате чего поплавок затонет.However, the device does not have sufficient reliability due to the presence of an inlet valve in it, which makes it difficult to configure and the need for complete tightness when it is closed. So if this valve is set to a pressure drop greater than the weight of the hydrostatic column of liquid corresponding to the height of the drain pipe above the level of immersion, then when the pressure inside the vessel rises, not gas, but liquid will enter the float, as a result of which the float will sink.

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То же самое произойдет и при неплотном закрытии клапана в результате постепенной конденсации внутри поплавка жидкости, которая не удаляется.The same thing will happen when the valve is loosened as a result of gradual condensation inside the liquid float, which is not removed.

Цель изобретения - повышение надеж- ₅ности работы устройства.The purpose of the invention - increase the reliability of papers, ₅ devices.

Поставленная цель достигается тем, что верхние концы обеих трубок соединены между собой и сообщены с газовым пространством резервуара, в котором Ίο расположен поплавок.This goal is achieved by the fact that the upper ends of both tubes are interconnected and communicated with the gas space of the tank in which the float is located.

На чертеже представлено устройство.The drawing shows a device.

Поплавок содержит полый корпус 1, внутри которого расположено дренажное устройство, выполненное в виде двух трубок 2 и 3. Нижний конец трубки 2 установлен в отверстии, выполненном в дне корпуса 1, а нижний конец трубки 3 расположен выше дна _юкорпуса 1 на 1-10. мм. Верхние концы трубок 2 и 3 соединены между собой и сообщены с газовым пространством резервуара, в котором расположен поплавок. 25The float comprises a hollow body 1 inside which is located a drainage device in the form of two tubes 2 and 3. The lower end of the tube 2 is mounted in the hole formed in the bottom of the housing 1 and the lower end of the tubing 3 located above the bottom of the housing 1 _st 1-10 . mm The upper ends of the tubes 2 and 3 are interconnected and communicated with the gas space of the tank in which the float is located. 25

Устройство работает следующим образом.The device operates as follows.

По мере накапливания конденсата в нижней части поплавка на выходе трубки 3 образуется гидрозатвор, ₃₀ препятствующий свободному газообмену между внутренней полостью поплавка и газовым пространством емкости. При самом незначительном падении давления в емкости скопившийся конденсат свободно выталкивается в трубку 2 и ³⁵в емкость, поскольку для выталкивания конденсата на такую незначитель ную высоту необходим незначительный перепад давлений внутри и снаружи поплавка.As condensate accumulates in the lower part of the float, a water lock forms at the outlet of the tube 3, ₃₀ preventing free gas exchange between the internal cavity of the float and the gas space of the tank. With the smallest pressure drop in the tank, the accumulated condensate is freely pushed into the tube 2 and ³⁵ into the tank, since for the condensate to be pushed to such an insignificant height, a slight pressure drop inside and outside the float is required.

За счет того, что верхние концы трубок дренажного устройства соединены между собой и сообщены с газовым пространством резервуара, обеспечивается повышение надежности предлагаемого устройства, так как стало возможным исключить входной клапан.Due to the fact that the upper ends of the tubes of the drainage device are interconnected and communicated with the gas space of the reservoir, the reliability of the proposed device is improved, since it became possible to exclude the inlet valve.

Claims

The invention relates to instrument making and can be used for measuring the level of a liquid in vessels operating under high pressure. Devices are known that contain a hollow body with a discharge tube, wherein the housing and the discharge tube are provided with outlet and outlet air valves 1, respectively. The drawback of the device is: lack of reliability, due to the fact that the release of condensate accumulated in the lower part of the float occurs only at a significant pressure difference inside and outside the float, since for a complete discharge of the condensate the pressure inside the float must be greater than the external pressure by the amount of hydrostatic pressure of the fluid in the outlet tube to the full height of the float. The closest in technical essence to the present invention is a float device comprising a hollow body, inside of which is a drainage device, made in the form of two tubes, the lower end of one of which is installed in a hole made at the bottom of the body, and the lower end of the other tube is located above the bottom housing 2. However, the device does not have sufficient reliability due to the presence in it of the inlet valve, which causes difficulty in setting it up and the need for complete tightness when closing it. A tick if this valve is set to a differential pressure, the greater the weight of the hydrostatic liquid column, corresponding to the height of the drain pipe above the immersion level, and when the pressure inside the vessel rises, not gas but liquid will flow into the float, causing the float to sink. The same will happen if the valve is not tightly closed due to gradual condensation of liquid inside the float that is not removed. The purpose of the invention is to increase the reliability of the device. The goal is achieved by the fact that the upper ends of both tubes are connected to each other and communicated with the gaseous space of the tank in which the float is located. The drawing shows the device. The float contains a hollow body 1 inside which there is a drainage device made in the form of two tubes 2 and 3. The lower end of the tube 2 is installed in a hole made in the bottom of the body 1, and the lower end of the tube 3 is located above the bottom of the body I by 1-10. mm The upper ends of the tubes 2 and 3 are interconnected and communicated with the gas space of the reservoir in which the pop benches are located. The device works as follows. As the condensate accumulates in the lower part of the float, a water seal forms at the outlet of the tube 3, preventing free gas exchange between the internal cavity of the float and the gas space of the container. With the smallest pressure drop in the tank, the accumulated condensate is freely pushed into the tube 2 and into the tank, since a slight pressure drop inside and outside the float is required to push the non-condensate to such a small height. Due to the fact that the upper ends of the tubes of the drainage device are interconnected and communicated with the gas space of the reservoir, the reliability of the proposed device is improved, since it has become possible to eliminate the inlet valve. Claims of the Invention A float device for measuring the level of a liquid in high-pressure vessels, comprising a hollow body within which a drainage device is arranged, made in the form of two tubes, the lower end of one of which is installed in a hole made in the bottom of the body, and the lower end of the other tube is located above the bottom of the housing, characterized in that, in order to increase the reliability of the device, the upper ends of both tubes are connected between themselves and communicated with the gas space of the tank, in which is located avok. Sources of information taken into account during the examination 1. USSR author's certificate NMt11305, cl. G01 F 23/06, 1971.

2. USSR author's certificate number 720311, cl. G 01 F 23/06, 1978 (prototype).