SU979897A1

SU979897A1 - Liquid temperature indicator

Info

Publication number: SU979897A1
Application number: SU813264629A
Authority: SU
Inventors: Владимир Иванович Гарюнов; Владимир Андреевич Керножицкий
Original assignee: Военный Инженерный Краснознаменный Институт Им.А.Ф.Можайского
Priority date: 1981-03-26
Filing date: 1981-03-26
Publication date: 1982-12-07

Description

(54) СИГНАЛИЗАТОР ТЕМПЕРАТУРЫ ЖИДКОСТИ(54) FLUID TEMPERATURE SIGNALIZER

1 , Изобретение огноситс к термометрии1, The invention is flame retardant thermometry

и можег бьгть использовано при допуско- вом контроле жидких сред.and it can be used in admission control of liquid media.

Известен сигнализатор температуры жидкости, содержащий размешенные в герметичном корпусе подвижный и неподвижный магниты и термочзгвствительный элемент из ферромагнитного материалаThe liquid temperature indicator is known, containing movable and stationary magnets and a thermal element made of a ferromagnetic material placed in a sealed enclosure.

tl.Недостатком указанного С11гналнзатора вл етс возможность контрол одного значени температуры.tl. A disadvantage of the said C11 satcher is the ability to control one temperature value.

Наиболее близким к изобретению по технической сущности и достигаемому результату вл етс сигнализатор текшературУ жидкости, содержащий герметичный цилиндрический корпус, в основании которого неподвижно установлен магнит, снабженный термочувствительным элементом из ферромагнитного материала и обращенный одноименньп полюсом к подвижнйму магниту, а верхн часть корпу. са снабжена закрепленным внутри нее грузом t 2 .The closest to the invention in technical essence and the achieved result is a liquid signaling detector, containing a sealed cylindrical case, at the base of which a magnet is fixedly mounted, equipped with a temperature-sensitive element made of ferromagnetic material and facing the same magnet, and the upper part of the corpus. It is equipped with a cargo t 2 fixed inside it.

Недостатком известного сигнализатора вл етс необходимость принудительного возвращени в исходное положение после окончани измерени , что затрудн ет процесс контрол . A disadvantage of the known detector is the necessity of forcibly returning to the initial position after the end of the measurement, which complicates the monitoring process.

Цель юофетени - снижение трудоемкосги и повышение безопасности измерений .The purpose of juofenis is to reduce labor-intensive and increase measurement safety.

Поставленна шель достигаетс тем, что в сигнализаторе температуры подвижto ный магнит размешен в сильфоне аиа-, магштного материала, укрепленном одним из оснований на термочувствительном элементе и частично заполненном жидкостью .The supplied shell is achieved by the fact that in the temperature detector a mobile magnet is placed in the bellows of aia, magnetic material, reinforced with one of the bases on a temperature-sensitive element and partially filled with liquid.

ISIS

На фиг. 1 показан предлагаемый сигнализатор в исходном положении; на фиг. 2,3 - то Момент аоотижени температуры контролируемой жидкости, соответствукнцей нижнему и верхнему FIG. 1 shows the proposed alarm device in the initial position; in fig. 2, 3 - The instant of outflow of the temperature of the controlled liquid, corresponding to the lower and upper

го пределам настройки сигнализатора.the limits of the alarm settings.

Claims

The device comprises a housing 1, made in the form of a sealed cylinder, at the base of which a permanently installed 9-979 pen magnet 2, equipped with the same pole as the movable magnet 3 and equipped with a heat-conducting element 4 made of ferromagnetic material, set Lenny in the path of the magnetic fluxes of the magnets 5 anchored part of the casing, bellows 6 of a diamagnetic material, reinforced by one of the bases on the thermosensitive Element 4 and partially filled with liquid. The mass of fluid required to fill the bellows can be determined from the formula (1) t lg the mass of the fluid; bellows radius; bellows length at critical fluid pressure; —critical fluid density. In order to reliably indicate the upper limit of the monitored temperature range, the absolute elongation of the bellows is chosen to be equal to its initial length t v-p -pr2 at RcrZ (2) where K is the stiffness of the bellows; Rcr - critical pressure. Substituting (2) in (1) receive the required amount of liquid in the bellows of the n2L2g4a KR. The temperature indicator works as a follower. In the initial position (Fig. 1), the device floats in a controlled fluid in a vertical position. Under the influence of the temperature of the liquid, the temperature-sensitive element 4 heats up and when the temperature reaches the point of discharge, it loses its magnetic properties, and it ceases to shield the magnetic fluxes of the magnets .2 and 3. As a result, repulsive magnet forces arise between them It is located inside the bellows 6 up to the stop in its upper base, thereby changing the position of the center of gravity of the device and putting it into a state of unstable equilibrium. Case 1, deviating from the initial position of the transducer in a new stable state horizontal (Fig. 2). Floating the device in a horizontal position indicates that the temperature of the monitored fluid has reached the T temperature — the Curie point of the temperature-sensitive element 4, 7. When the temperature of the Kofirpliruyuya liquid reaches T, which is critical for the fluid filling the bellows 6, the latter is extended so that the movable magnet 3 by moving in the direction of load 5, it will change the position of the center of gravity of the device so that it moves to the whole stable position, turning 180 ° relative to the initial position expansion (FIG. 3). If the upper and lower halves of housing 1 are colored in different colors, contrasting with respect to the controlled liquid, then the appearance above the liquid of a part of the housing painted in the corresponding profile can visually judge whether the controlled liquid has reached the lower or upper limits of the indicator setting equal to the corresponding temperature Curie points of the thermosensitive element and critical terapure of the fluid filling the bellows. When the temperature of the controlled liquid decreases to T / 2, the vapor in the bellows 6 condenses and its pressure decreases, as a result of which the bellows is shortened so that the new position of the center of gravity of the device ensures its return to the horizontal position (Fig. 2). Floating the device, in a horizontal position, indicates that the temperature of the controlled liquid reaches T. With a further decrease in the temperature of the liquid to T, the magnetic properties of the temperature sensitive element 4 are restored, which again starts to shield the magnetic fluxes of the moving and stationary magnets 3 and 2, thereby disappearing magnetic repulsive forces and the movable magnet 3 are attracted to the thermosensitive element 4. The position of the center of gravity of the device changes so that it again occupies the initial position (Fig. 1), signaling that the temperature of the controlled fluid has become less than or equal to T ,. The invention improves the operability and ensures the safety of the measurement, since it eliminates the need to force the detector back to its original position. The device is constantly ready to measure regardless of its position in the controlled liquid. Claims of the liquid temperature detector containing a cylinder body, in which the magnet is fixed, equipped with a temperature-sensitive element made of a ferromagnetic material and facing the movable magnet with the same name, the upper part of the body is provided with a weight fixed inside it, which is distinguished by the fact that in order to reduce the labor intensity and increase the safety of measurements, under izhny magnet that serves the bellows of diamagnetic material reinforced with one of the bases on the temperature sensing element and partially filled with fluid. Sources of vnformvpvi taken into account during the examination 1. USSR author's certificate number 678343, cl. WITH; p1 K 7/38, 1977. 2, USSR Copyright Certificate No. 877355, cl. G 01 K 7/38, 198O.