DE7033762U - LIQUID LEVEL INDICATOR. - Google Patents

Description

Pierre Pehau. Maj land / Italy

= i ^ ssoiegeianzeiger

The present invention aims at one Liquid level indicator for automatic continuous Measurement of the liquid level within containers, in particular for displaying the liquid level of liquid gases.

The present invention is particularly suitable for liquid containers which are filled with liquefied gas are. It gives a continuous and direct measurement of the liquid level within the general cylindrical container.

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With the liquid level indicators known up to now, it was often necessary to provide a further opening in addition to the drain opening which enables a measuring device to be introduced. In the case where the drain port is used, a generally difficult to operate and complicated device is required.

In some cases the direct and continuous reading of the liquid level can be done within Containers are very important. This is very often the case for the user, particularly in the case of cylinders filled with liquid gas It is important to know how much gas is left in the container at all times, and to get a replacement container at the right time to procure or to be able to monitor gas consumption.

Accordingly, the aim of the present invention is to to create a continuously and automatically working liquid level indicator without the provision of special Holes in the 3 container can be used.

According to the invention this is achieved in that one responsive to changes in the liquid level Element a transmission device and one of the same influenced reading part are provided.

Such a relatively simple and low-cost kit of manufacturing liquid level indicators that can be adjusted can very easily be attached to the opening of the Container are attached, only a small opening is necessary.

Although in the Fulg ^ iiäei. the invented indigenous fluid ::; = Mirror indicator in connection with the reception of liquefied gas serving cylindrical container.- described is, it should be understood that such liquid level indicators for any liquid container, for example fuel tanks, can be used.

In the following, the invention is to be explained and described in more detail using exemplary embodiments, reference being made to the accompanying drawings. Show it

1 to 5 different embodiments of the invention Liquid level indicator with a float,

H and 5 embodiments of the liquid level indicator according to the invention with a cylinder,

6 shows a further embodiment of the liquid level indicator according to the invention, and

7 and 8 embodiments of the reading part of the invention Liquid level indicator with magnetic transmission.

In the following, reference should be made to FIGS. 1 to 3, in which several embodiments of the

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erfinuungägeir.äSen liquid sspiegelar.z-eig ^ r: =. shown are, polygamy a swimmer 1 cut ..iron that. funnel than the liquefied gas is. This o-hvrimn.er 1 speaks up Changes in fluid levels,

1, majij recognizes that the vertically movable float 1 is arranged displaceably within a tube 2, which is connected to the liquid in its lower part. The float 1 has a vertically extending cylindrical bore, the diameter of which is larger than the diameter of a spiral rod. This spiral rod 3 extends over the entire height of the cylindrical container and is connected to a drive device, not shown. At the upper tail of the swimmer 1, the cross section of the bore is reduced with the aid of a cap 4, the opening within this cap 4 being slightly larger than the cross section of the spiral rod. As a result, when the float 1 moves vertically, the spiral rod J> rotates. The spiral rod 3 has at its lower end a ball which is mounted in a seat 5 of the tube 2, so that the friction of the rotatable spiral rod J is reduced. During the vertical movement of the float 1, the float is guided inside the tube 2 with the aid of grooves 6 so that the float cannot rotate. As soon as the liquid level inside the cylindrical container falls below a certain value, the float 1 sinks, whereby the spiral-shaped rod 5 is set in rotation wi.od. The angular displacement

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this spiral rod 3 is c ^ .bei in an exact Relation to the vertical change in the liquid level.

Fig. 2 shows a liquid side level indicator, in which a float 1 is also used to display the vertical movement. The swimmer 1 However, it does not swim directly in the liquefied gas, but in a barometric medium, preferably mercury. This barometric medium is arranged within a vessel 8, which is preferably in the area of the Is arranged bottom of the cylindrical container. A pipe 7 leads into this vessel 8 - the float 1 is displaceable stored within the tube 7, which at its upper end with the gas phase of the cylindrical container in Connection is. The height of the mercury column inside the tube 7 is a function of the liquid level, the float 1 following the mercury level shows a vertical displacement that is approximately 25 times smaller is than that of the liquid level within the cylindrical Container. If necessary, this ratio can be further increased by changing the shape of the vessel 8 is chosen such that the change in the mercury level is not negligible.

In Fig. 3 a further embodiment of the inventive liquid level indicator is shown, which also has a float 1, which, however, is not vertically displaceable, but pivotable and so on

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Axis 9 is mounted. This axis 9 is preferably arranged in lindrisehen hfelber height TUs z $ container. The weight of the float I and the support arm Io is partially compensated for by a counterweight 11. The rod 12 of the drive mechanism is guided in a suitable manner within a tube 13; the lower end of the rod 12 rests on the counterweight 11, which is designed like a cam. The shape of the counterweight 11 results in a vertical movement of the rod 12 as soon as the float 1 is pivoted about the axis 9. The cam profile is chosen such that a proportional shift takes place as a function of the vertical displacement of the float 1, ie the liquid level within the cylindrical container. £ - ~ s tube connected to an outer measuring indicator Γ- v.sijt- some openings 14 intended for the passage of the gas and two slots arranged on the lower part, which allow pivoting of the cam-shaped counterweight 11 and the support arm Io with the float 1 .

In the embodiments shown in FIGS. 4 and 5, the liquid level indicator _{consists of} a cylinder 16 which is heavier than the liquid. This cylinder 16 is guided through a guide tube 17 which is attached to the end of the display device. The drive tube 16 extends over the entire useful length of the cylindrical container - ie from the highest to the lowest point of the liquid level. The effective weight of the cylinder 16, which corresponds to the hydrostatic buoyancy according to the liquid level

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is exposed to fluctuations, is subject to appropriate V / s measured.

According to FIG. K , the drive tube 16 is connected to a compression spring 18. This compression spring 18 is selected such that the extension caused by changes in lift from the highest to the lowest point of the liquid level corresponds to the maximum movement of the rod 19 which is attached to the cylinder 16. The cylinder 16 is guided during its vertical movement within the guide tube 17, which is the same or less than the useful length of the container. In the embodiment shown in Fig. 4, the cylinder 16 is only partially guided by the guide tube 17 during the first part of the movement. In this case the head of the cylinder 16 is designed so that it is held in a vertical position, even if the cylindrical liquid container is not arranged exactly in a vertical position. The freedom of movement of the cylinder 16 in the lateral direction can be restricted by a stop, so that when the cylindrical container is pivoted out of its vertical position, the cylinder 16 is prevented from hitting the inner walls of the cylindrical container. The guide tube 17 can, however, also be omitted entirely.

In the embodiment shown in Fig. 5, the cylinder 16 is suspended from counterweights 23, which on lem the same principle as scales work. The cylinder 16 is held by means of a linkage, which consists of two legs

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20 and two further legs which are pivotably arranged for this purpose 21 consists, the latter in turn being held on a pin. At the ends of the legs 21 are the two Counterweights 2J attached. At the ends of the legs

21 a pair of further legs 24 are articulated. The other ends of the legs 2k are jointly attached to a rod 19 for transmitting the movement. The counterweights 23 and the legs are designed in such a way that the weight of the cylinder 16 is balanced. As soon as the liquid level falls within the cylindrical container, the effective weight of the cylinder 16 increases because of the reduced buoyancy. In order to maintain the equilibrium with the aid of the counterweights 23, the cylinder 16 drops by a certain amount, while the rod 19 rises by a certain amount. The position of the rod 19 is thus functionally related to the height of the liquid level within the cylindrical container.

In the embodiment shown in FIG. 6, the liquid level indicator consists of a pressure-sensitive one Element at the lower end of the cylindrical vessel. This pressure sensitive element is deformable in dependence the pressure difference between the bottom of the liquid and the gas phase, i.e. the weight of the liquid column. In this embodiment, a bellows 25 is used as the pressure sensitive member. This bellows 25 is sealed attached to the drive tube 26, which part of the liquid

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Mirror indicator is. The pressure acting on the lower side of the bellows 25 by the liquid is through a spring 27 is balanced, which is arranged between the bottom of the bellows 25 and one inside the tube 26 Disc 28 is arranged. When the liquid level falls within the cylindrical container the pressure on the lower surface of the bellows 25 drops, so that the spring 27 expands and the bellows 25 together with the rigidly attached rod 19 lowers. The position of the rod 19 is thus a function of the Liquid level, because both the lower part and the gas fold on the upper part of the bellows 25 acting vapor pressure of the liquid has no influence.

In the Ausführungsforraen shown in Figs the result is that a change in the liquid level results in an angular or translational displacement a vertically arranged light rod causes, at the upper end of which the display device itself is arranged is. This indicator, which is usually attached to the cylindrical container, is with the rod tied together. The connection to the display device can be made with the help of two magnetic elements, one of these elements being arranged inside the tube 7 of the cylindrical container, while the other is arranged outside.

Fig. 7 shows a longitudinal section of a reading part, which at the top of the rod 19 a vertical move

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has conditions executing magnet 28. The reading part also has a housing Jo with a through

visible outer appearance ~ j \ is provided. This housing 30 is arranged in a recess of the tube 29 and at the level of the magnet 28. The housing is filled with a liquid, in which a display element 52 is arranged with approximately the same height of the liquid. This display element 32 contains a second magnet. All materials for the production of the housing 3o and the display element 32 are made of non-magnetic material. The magnet arranged within the display element 32 follows the vertical movement of the magnet 28, while it is guided past a calibrated scale 33, so that a measure of the liquid level within the cylindrical container is obtained. Among other things, to improve the readability of the liquid level, the vertical offset of the display element 32 can be increased, for example because the ar.i.eigeelenent 32 is arranged on the short leg of a two-armed lever, while the reading point is provided on other longer levers is.

Fig. 8 shows a modified embodiment of the reading part, which in Verbdung with erfindungsgsoässen Liquid level indicators can be used in which a rotary movement of the rod takes place. The rotary motion can either be transmitted directly via a pole

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703376223.3.72

as is the case in the embodiment of FIG. 1, or by a suitable Umform <v.ig eir — r longitudinal movement, which corresponds to the change in the liquid level. Fig. 8 shows an example of the conversion of a vertical movement of the rod 19 into a rotary movement about a shaft 34. The rod 19 is provided on its upper part with a jaw 37 which has a central bore 38 in which a spiral shaft Jk is rotatably mounted. The point 35 of the spiral shaft 34 can rotate essentially smoothly on a seat 36 because this seat JjC forms part of the guide tube. The vertical movement of the rod 16 and the change in the level of the liquid inside the cylindrical container consequently cause the helical container to rotate. Shaft 34 and consequently a magnet 28. The display device arranged outside the magnet 28 consists of a housing 39 with a transparent outer wall 4o. This housing 39 contains a further magnetic element 4i which is mounted rotatably about a shaft 42 and is driven by the rotary movement of the magnet 38. The combined effect of the two magnets 28 and 41, which are rotatable about different parallel axes, causes such a coupling that the magnetic field strength is increased so that a noticeable rotation takes place even with small displacements of the magnet 28.

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In another version ^ ungsforv. The coupling between the two magnetic fields \ nlx can be achieved with the help of two independent magnetic elements arranged inside and outside the cylinder, the axes of which are not parallel, the magnetic effect of one influencing the other as soon as the liquid level is inside of the cylindrical container changes and consequently the magnet 28 influences the magnet 41 via the magnetic coupling.

The magnet 41 is provided with a scale 45 for display purposes provided, which is passed in front of a marking arranged on the transparent wall 4o of the housing 59. In the same way, however, the scale can also be arranged on the housing 59 and the marking on the outer magnet 41 be.

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Claims (1)

3 η a ii s check e 1. Liquid level indicator? Ur automatic continuous measurement of the liquid level inside of containers, in particular for displaying the liquid level of liquid G & .sen, characterized in, that an element responsive to a change in the liquid level (I ^ a transmission device and a reading part influenced by the same are provided. S>. Liquid level indicator according to claim 1, characterized in that marked net that the transmission facility The signal of the liquid level is transmitted outside and from a rod (5 * 12, 19) and a magnetic one There is a coupling between two magnets (28, 41) (FIGS. 7 and 8). J. Liquid level indicator according to claim 1 or 2, characterized in that the changes the liquid level responsive element is a float (l), which is within a stationary vertical Tube (2) is displaceable, and that the float (1) is provided with a bore in which a helical Rod (3) is rotatably mounted, which is connected at its upper part to the transmission device (28, 32, 42) 1st (Fig. 1). 4- Liquid level mirror according to An or 2, characterized in that the device which responds to the change in the liquid level consists of a float (1) which can be displaced within a vertical tube (7), in each case in a vessel filled with mercury ^ 8) is arranged, the upper surface of the vessel (8) communicating with the liquid of the cylindrical container and the Sehwimner (1) via a vertically movable rod with the transmission device (28, 52, kl) is connected (Pig .2). 5. Liquid level indicator according to claim 1 or 2, characterized in that the responsive to changes in the liquid level Device consists of a float (1) rotatable about one of the stationary axis (9) and that the float (l) partially balanced by a cam-shaped counterweight 11 on which a vertical rod (12) connected to the transmission device rests (Fig. 3) 6. liquid level indicator according to claim 1 or 2, characterized in that the A device responsive to a change in the liquid level consists of a cylinder (16) which is heavier than the liquid and extends through the entire height of the cylindrical container, and that this cylinder (16) is connected to a compression spring (18) and a rod (19) which is connected to the transmission device is in connection (Fig. 4). -15- 7 · Liquid level indicator according to claim 1 uiiiäi · 2, deiuurch g ö k e n ii ζ e i υ h ii e L that the one responsive to changes in fluid levels Device consists of a cylinder (IG), which is heavier than the liquid and extends over the entire height of the cylindrical container extends, and that at the upper end of the cylinder (16) a linkage (2o, 21, 24) is arranged with counterweights (23), which is connected to the transmission device via a rod (19) (Fig. 5). 8. Liquid level indicator according to claim 1 or 2, characterized in that the device responsive to a change in the liquid level consists of a device at the lower end of a tube (26) arranged deformable element (25) consists, which with the lower surface in connection with the liquid phase and the top. Area is in connection with the gas phase, the pressure difference with the help of a Compression spring (27) is balanced and that the deformable element (25) via a vertical rod (19) with the Transmission device is connected (Fig. 6). 9. liquid level indicator according to claim 1 or 2 and one of claims 4 to 8, characterized in that at the upper end of the vertical Rod (I9) a first magnet (28) is attached and -16- that on the outside of the cylindrical container in speed filled housing (30) is arranged in which a second magnet (32) is arranged, which upon a vertical displacement of the first magnet (28) is shifted, whereby this movement can also be enlarged with the help of a lever (Pig. 7) · 10. Plüssigkeitssjlegelanzeiger according to claim 1, 2 or 3 »characterized in that the first magnet (28) has a rotatable shaft (34) is firmly connected and that a further magnet (41) is provided which is about a parallel axis of rotation of the first magnet (28; parallel axis (^ 2) diehuäi- .-. St, vuxd that this second magnet (41) inside an outside of the liquid container arranged housing (39) is arranged at the same height as the first magnet (28), the second magnet (41) or stationary one Scale is provided (Pig 8). 11. liquid level indicator according to claim lo, characterized in that the axes of rotation of the two magnets (28) (41) are not parallel, however, a magnetic coupling of the two magnets (4l) and (28) still takes place. 12. Liquid level indicator according to claim 1 or 2 and one of claims 4 to 8, characterized in that the vertical longitudinal movement des responsive to changes in fluid levels :: Element is converted into a rotary movement (PiS- 8).