DE7830881U1 - FLOAT DEVICE TO DISPLAY THE LEVEL IN A VESSEL - Google Patents

Description

PRATELLI BORLETTI S. p. A. I 20 146 Milano / Italy Via Washington 70

Float device for displaying the level in a vessel

The present invention relates to a |

Float device for displaying the minimum or |

the maximum level of a liquid in a f

Vessel. ^;;

Display devices of this type are used more and more in the automotive sector, where they are not only to display the fuel level, but also the Water, the oil and the windshield wiper fluid and the like. Use.

For all of these various applications, there has not yet been a display device with very small dimensions - Dimensions designed that works reliably, too

can be manufactured at a very low price and is easy to assemble.

In order to meet this need, various institutions have become known, all of them after the "everything." or nothing "will work as they only display an indication of the" minimum water level "or in some cases of the principle "maximum water level" as opposed to a gradual

() allow loose display of changes in the water level,

like them only, but not always, with the petrol tank

a motor vehicle is required, it

Such devices are disclosed, for example, in U.S. patents 3.603.926, 3.750.124 and 3.471.665 and the FR-PSeη 7.100.516 and 1.576.090 known, all of which use a magnetically operated protective gas switch Csog. Reed switch), which is immobile, arranged and attached to a float

Magnet responds. It can happen that the swimmer is in a small area around the target level moved so that the switch is opened and closed.

One of the first developed systems of this type can be found in US Pat. No. 3,603,926, in which

() a ring-shaped float that carries the magnet around

the inert gas switch is arranged.

The disadvantage of this device is that it is perpendicular to the upper tank wall must be attached. As a result, in larger tanks or other vessels, it is only close to display one the level standing on the upper wall enables it unless an extension rod, which is usually difficult to attach, is used. With very small ones or very flat tanks or storage vessels, such as the upper chamber of an engine cooler,

the application is therefore impossible because the space i
not enough.

The devices of US-PS 3,750,124 and PR-PS 7,100,516 (variant according to Figures 3 and 4) seem to be more beneficial. You own one with

(ItI ft

Inert gas switch arranged horizontally as well as a float, which is vertically over a short Working stroke moves.

Although these devices overcome the disadvantages outlined above and can be very flat Tanks and, especially in the case of US-PS 3,750,124, at any height of the tank without any particular difficulties thereby install or assemble that you simply attach them to the tank side wall.

In the US-PS 3,750,124, however, the support and the vertical guidance is relatively complicated to its Cultivation requires special care so that an exact vertical position is guaranteed.

The device of FR-PS 7.100.516 is also relatively complicated and requires a special design of the tank or the vessel, although it does not have any There are more difficulties in sealing or in maintaining the correct position because of the installation of the float inside the tank regardless of the The inert gas switch is installed. The protective gas switch is sealed on the outside in a preformed one Arranged cavity.

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ί One of the construction of US-PS 3,750,124 ahn- * i

liche ^ but older and simpler arrangement is in
U.S. Patent No. 3,471,665 or in the PR PS 1,576,090 sawn i schriebenο These devices are very similar; and in turn assign one to the tank side wall
fastening inert gas switch and an elongated one
Float on, which will hold gev pivotable at one end.

Although these devices have the advantage of being easy to assemble, they have the disadvantage
that an exact position is maintained during the fastening
must be so that the swivel axis of the float hori- |

is zontal. Furthermore, with FR-PS 1.576.090 in particular, the further disadvantage that is present is that a
Part in the connection opening Mon inside the tank
must be installed, which is not always quite possible, and even impossible in some cases f.

The present invention is based on the object of providing a float device of the type initially mentioned

described design to indicate all of the mentioned! Avoids disadvantages and which in particular apply to everyone | Can be fastened to any height of the vessel wall without there being any special setting or positioning around the horizontal axis, and that of

mounted outside the tank and by loosening a Screw connection can be removed without the float running the risk of hitting the edge of the connection opening in the tank wall and thereby being held fast to become.

According to a main form of the present invention, this is made possible by an apparatus that has a

Base for attaching to the side wall of the vessel, | a substantially horizontally extending from the base, a protective gas switch containing sleeve, and a float which is capable of a To execute movement in relation to the inert gas switch and the one magnet actuating the inert gas switch] carries, and is characterized in that the float, which is cylindrical and whose axis is horizontal, freely rotatable on the sleeve using an axial

^v hole is arranged whose cross-section in the direction '!

the base diameter is extended, and a counterweight comprises circumferentially secured in a position corresponding to one of the diametrical ends of the axial bore is equivalent to.

According to another important feature of the Er- I

the counterweight consists of the magnetic one Material or from the magnetic mass that actuates the inert gas switch.

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According to a further feature of the invention, the material is as a conical projection at the end formed, which is opposite to the mounting base to enable a implementation, or to a To form implementation facility.

These and other features, advantages and peculiarities

/ \ Transactions of the invention are the following description

j of a preferred embodiment based on the characters

information. Show it;

Figure 1 schematically shows an axial section through the

clever swimmers,

FIG. 2 shows a similar section, but with an additional counterweight in the float, and FIG

Figure 3 is a view in the direction of arrow A of

upper part of the device.

According to the drawing, the device according to the invention comprises a base 1 for attachment to the wall P of a tank or another vessel containing a liquid, the level of which is to be monitored. In the drawing, the base is made as a screw nut- but evidently it can take any shape.

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A sleeve 2 extends horizontally from the side of the base 1 facing the interior of the tank and encompasses it a protective gas switch 3, the electrical connections of which are connected to pins 4, 4 ″, which are different from the Extend the outer part of the base 1.

The substantially cylindrical float 5 is attached to the sleeve using an axial hole 6, whose cross-section is rectangular or substantially elliptical (Figure 3), with its smaller Alb measurement is essentially equal to the outer diameter of the sleeve. Because of this design and this shape of the assembly, which is completed by the stop washer 7 attached to the free end of the sleeve is, the float is freely rotatable and within the determined by the longer dimension of the bore 6 Limiters are also freely displaceable with respect to the sleeve 2 and parallel to its axis.

A mass 8 as a counterweight is in the float on the circumference at one of the diametrical ends of the axial bore appropriate. In the arrangement of FIG. 1, this mass or this material is used as the actual magnet designed to operate the inert gas switch.

The mode of operation of this arrangement is as follows: when the tank is empty or when the water level is at a minimum,

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e.g. at stand X, the eccentric material of the Counterweight 8 the swimmer in a stable state of equilibrium shown in solid lines. The magnet is at a distance from the shielded gas switch, |: whose contacts are therefore open at the minimum level | .are. i

As soon as the level rises, e.g. at height Y |

over, the swimmer is buoyant by the |

Fluid moved up to point 5'-8 '1

which is indicated by broken lines \.

will. During this ascent of the swimmer, i

this parallel to the direction of movement, unless |

it is caused by a sloshing movement of the liquid in the |

Tank affected. The movement is perpendicular because of the;

Cross section of the gage weight 8, which is obviously ij also comes into play when the liquid exerts its buoyancy, with the result that during this

As the magnetic material ascends, 8 becomes the | Inert gas switch approaches until it responds to it

brings so that the contacts are closed at the maximum level f .

It should be emphasized that the vertical movement of the swimmer is parallel to himself in the desired Way exclusively through the: eccentric counterweight, which without further control

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or guide means for the stable state of equilibrium of the swimmer, which is important because the float is freely movable relative to the sleeve 2 with respect to turning or pivoting back and forth is, so that consequently no special precautions are necessary to the support base 1 of the device in relation to keep angular on its horizontal axis if the device is fastened in the opening P 'of the wall P, e.g. by screwing or rotating the base will. Regardless of the position of the base 1, the float will only remain in the desired position shown by the action of the counterweight 8. The longer horizontal dimension of the hole is vertical.

Because its position is not precisely determined when the device is installed, the position of the protective gas switch is in relation to the magnetic field of the material. also indefinite, so that the effect of the field on the contacts depending on the random orientation will be bigger or smaller. It should be noted, however, that the dependency on a modern inert gas switch of the orientation of the magnetic field is generally very small and that the large vertical stroke of the Magnet, which is implemented in the float according to the invention, and the resulting large change in

-lthe magnetic field effect on the inert gas switch this sensitivity of the switch in practice: completely overcomes or as; Appear negligibly small leaves.

As mentioned, the contacts of the arrangement according to FIG. 1 are opened at the minimum level and at closed to the maximum level.

Under certain circumstances, the reverse order may be desired, in which the contacts with minimal Stand closed and open at maximum stand

In such cases, there is no need for major changes to the design, because according to the invention it is sufficient if one further non-magnetic material 8A, which is heavier than the material 8, in a chamber 9 mounts in the float, which is arranged diametrically opposite the chamber comprising the magnetic material 8. This additional material only exercises the function a counterweight.

In this case, the float suddenly comes to rest in the position according to FIG. 2, which is reversed with respect to the position of FIG. In the previous case, it was the weight of the material 8 that required the swimmer to remain stable

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in this case it is material 8A whose Effect that overcomes the effect of the material for the new situation is responsible.

I You can see that in such a position the magnet

I close to the shielding gas switch at the minimum water level

I is located, so that consequently the contacts are at a minimum

■, \ stand close while they are at the maximum stand

remove, which results in the contacts being opened at the maximum I position.

In Figures 1 and 2, an additional

I property of the device according to the invention

j, illustrative. The swimmer has a conical

I frusto-shaped extension 5 "on the end that corresponds to the

i socket 1 is adjacent for easy removal

p to enable when the device is dismantled

I ^y will.

I After the screw connection of the base 1

I has been released to remove the device from opening P ¹

I can be removed by a shift in direction A,

I could 5it- the bottom edge of the float in the

Position according to Figure 1 and Figure 2 because of the eccentricity of the float against the wall edge i and be held. The presence of the

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The frustoconical part 5 ″, however, prevents such an impact on the conical surface, which therefore plays the role of a guide which ensures a position centered ^{in the opening P 1 during dismantling.}

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Claims (1)

S c h. η t ζ a ns ρ r ü che: - 1 - Float device to display the water level in a vessel that has a base for attaching to the side wall of the vessel, one essentially A sleeve which extends horizontally from the base and contains a protective gas switch, and a float has, which is able to perform a movement with respect to the inert gas switch and the one carries the inert gas switch actuating magnet, characterized in that the float (5), the is cylindrical and its axis is horizontal, is arranged freely rotatable on the sleeve (2) using an axial bore, the cross-section of which is extended in the direction of the base diameter, and comprises a counterweight (8) which is circumferentially in a Position is attached, which corresponds to one of the diametrical ends of the axial bore. Float device according to claim 1, characterized characterized in that the counterweight forms the magnet. Float device according to claim 1, characterized characterized that the protective gas switch (3) - 15 - actuating magnet (8) is mounted on the float (5) so that it is diametrically opposite the counterweight (8) and that the magnet is lighter than the counterweight. - 4 - i Float device according to claim 1, characterized characterized in that the end part of the float facing the base (1) is conical in the direction towards the latter is rejuvenated. Float device according to claim 1, characterized in that the float (5) on the switch C3) comprehensive sleeve (.2) is secured by a washer (7) at its end. Patent attorney