DE1529117A1 - Dry seal gas container - Google Patents

Description

Patent attorneys
Dr.-lng. HANS RUSCHKE

DipWng. HEINZ AGÜLAR

eMCtachen27, Pienrenauer5tr.2 ⁴

Jonn Henry Wiggins, Menlo Park, California

¹¹ Trooken ejection gas container ".

The invention relates to drying pressure gas containers and other devices for storing Madien. In particular, the invention relates to Trookendichtung pressure gas containers, which consist of a container which is provided with a cylindrical side wall, i

a vertically movable piston in the container, which the Upper deodorant wall of the gas storage room of the device forms and a flexible seal for the space between the piston and the container side wall made of gas-tight fabric, which is attached to the piston and the container side wall is attached to the rise and fall of the piston allow, and stop parts or stop surfaces, which are arranged in such a relationship with the flexible sealing part that during the working cycle

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of the piston use the stop surfaces as stop stops serve to absorb the pressure exerted by those in the storage chamber oases enclosed in the device is exerted on the elastic seal.

Usually the part of the container wall is the over the point where the fabric drainage is on the wall is attached, used, to, an "outer" stop;

r form the outer edge of the elastic seal lies and absorbs pressures on the elastic seal during the upstroke of the; Piston are exercised, and at least one vertically movable "inner" stop of tubular or cylindrical shape, the inside the outer stop is arranged in a concentric spacing relation to this in order to absorb the pressure, which is applied to the elastic seal during the downward movement of the piston. When the elaati-

See seal is built in the form of a relatively long or deep cylinder, which is attached at one of its ends to the "outer ¹¹ stop, which is formed by the container side wall and at its other end to the piston, the" inner "Ansohlag is through a tubular or cylindrically shaped component is formed which is rigidly connected to the piston and protrudes upwards from it; if the elastic seal consists of two cylindrical sections, one of which is attached to the container side wall and the other to the piston,

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becomes an additional vertically movable stop of tubular or cylindrical shape between the piston and the container side wall and provided on the two Sections of the seal fastened in such a way that during the working cycle of the piston the additional stop interacts with the stop on the piston, to support the inner wire section (the one closest to the piston) and the additional Stop acts with the stop surface on ^ the container side wall together to the outer section to assist the seal (the one closest to the container wall), as in the US patent No. 2,606,824 is disclosed.

This type of gas container with one outer and one inner stop is shown in earlier U.S. Patent No. 2,723 · 9ο8 and the present invention is an improvement over the gas containers shown therein,

It has been found that the proportioning of the Circumference of the outer stop and the inner stop as carried out in the above patent is wrong, because if the surface of the inner stop has the same effective scope as the outer stop, the seal is essentially constantly placed under tension, whereby a constant elongation takes place over a length which is equal to the length of the outer stop. Such Lengthening of the seal as a result of excessive stretching

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In a relatively short tent that the seal forms harmful wrinkles that affect the life of the seal considerably reduced.

It is a general object of the present invention to form an improved sinusoidal surface for the inner stop, and an improved spacing of the flexible seal between the outer and the inner Stop, with the flexible seal over the part of its Surface approximately close to the inner stop is subjected to seizure, and a tension above the portion of the surface approximately near the outer stop, whereby alternating stresses and pressures in the said flexible seal emerge » are called and an undesirable stretching of the flexible seal is avoided.

The solution to the above problem in accordance with the Invention forms an arrangement wherein the inner stop having a first part and a second part, and wherein the first part of the inner stop has a holding device for the second part, And is a purely cylindrical one Forms frame that has vertical uprights and circular supports and inward of the outer stop lies at a first radial distance which is necessary for a safe relative reciprocating movement of the to allow both stops, the first radial distance representing an operating stop, and the second

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Part of the inner stop has the shape of a sinusoidal Has surface which is fixed to the first part and whose actual length is the equivalent of a purely cylindrical surface which is at a distance to the outside of said first part of the inner stop in a second radial distance is that for right Compression of the flexible seal is required and a slightly smaller circumference than that of the flexible one Having seal, wherein the second distance represents a seal compression gap.

The flexible seal can be inward of the outer stop away when relaxed, at a third radial distance that is alternate correct expansion and compression of the pliable Seal is required and a seal stress gap forms.

The sinusoidal surface can consist of a series of plate elements, one or more perpendicular arranged edges or arcuate. Have parts to lean against one or more of the stands «* gen and calibrate on each side of each stand concave kind to extend to with the two neighboring Plate elements to come into mating engagement, wherein each of said plate elements has flanges on its has vertical edges and every pair of matching

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Flanges is screwed together to thereby bring the said Flattenelemente under tension and to create a smooth surface for the pliable · seal.

The vertically arranged edges or arcuate parts can form a circumferential series against each of the stands abut and extend to either side of each of the uprights. .

The main advantage of the invention is that in one Oas container as described herein, the flexible seal is subjected to both elongation and compression rather than being subjected to elongation alone, as is the case in the prior art was. This prevents permanent deformation of the flexible seal and thereby gives it a longer one Lifespan.

Further features and gate parts of the invention result from the following description of an embodiment shown in the attached schematic drawings.

Fig. 1 is a horizontal Sohnittansieht in the plane of line 1-1 in Fig.%

Pig. FIG. 2 is a fragmentary side view like that of FIG Line 2-2 in Pig, 1 indicated *

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Fig.3 is a vertical sectional view taken through the Line 3-5 in Pig. 2 stated 1st,

Fig. 4 is «ir. enlarged part of the in Fig.> shown cuts,

Figure 5 is a fragmentary perspective view

which shows the loft of the seal in the form of a sole, if 'they move from the inner stop to the outer |

Stop is moved or vice versa,

Fig. 6 is a fragmentary sectional _{view as indicated by the X 4} inIe 6-6 in Fig. 2 and

Fig. 7 is a side view of the bruohstUokwelsen sectional view of Fig. 6 seen from the right side thereof.

The gas containers according to the invention have a cylindrical side wall 11, a bottom 12 and a lid, not shown, in order to form a completely closed container for a Trookendlchtung flask gas container. The piston XJ has a solid base 14 around which a circular bracket or bracket Io is mounted, over which a circular frame is built, a bottom vertical slider 17 and an upper circular bracket or bracket? 18. The cross-braced carrier 18 has corresponding lugs 19, dl «on it, directed downwards

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are welded and which have a pair of openings to Fastening bolts (without reference number) for the vertical Stand 17 take up at their lower ends Holders 2o are welded on, which differ from their welded Connections extend upwardly on the bottom wall 14 of the piston. This forms a circular framework the first part of the inner stop.

The rubberized fabric seal 21 is held around the circumference of the circular support 16 by a series of clamping rods 22 which are screwed to the support 16, and at the upper end the sealing element 21 is fastened to the side wall 11 of the gas container by a series of clamping rods 2J. At both attachment points of the seal on the piston and on the side wall, care is taken that the connection is made gas-tight. The seal itself is a rubberized fabric seal of the "gas-tight type".
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Of particular interest is the construction and type of outer wall of the piston, which is the second part of the inner stop for the rubberized fabric seal 21 forms. and this outer wall consists of a row elastic plates that are constructed in such a way that they form a smooth, continuous, curved or sinusoidal surface on the outer edge of the piston. The arched ones Edges 26a of this surface extend perpendicularly, so that a perpendicularly corrugated surface acts as a stop

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for the seal is present _? and this is of a smooth, continuous type. It can be seen that each plate lies with its curved edge 26a over one of the vertical uprights 17 and then extends inwardly therefrom in a concave manner and the two edges of each plate 26 with a rectangular plan 27 which extends perpendicularly and is directed towards the center of the piston »The flaps 27 of adjacent plates 26 are connected to one another by a plurality of bolts 28, the dimensions of the plates and the spacing of the uprights 17 being such that these Plates 26 are under tension when bolted together and accordingly the bolts 28 are also under tension. There is no gap where the edges of the plates meet and therefore the gasket lies smoothly when it passes over these edges. Therefore, in fact, a smooth, continuous, corrugated or sinusoidal surface as an inner stop for the seal ones shown, {botenj and this surface including the corrugations has an average diameter of the circle 03 shown in dotted lines. This circle can be substantially equal to or slightly smaller (as shown) than the circle C4 of the relaxed state of the seal, ie when there is no gas in the container. Rectangular washers are provided for each of the bolts 28.

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It is therefore clear that the circumferential length of the rubberized fabric seal in the relaxed state is less than the circumferential length of the outer stop or the container wall and greater than the actual circumferential length of the sinusoidal support or the second T 11 s of the inner stop carried by the piston. Therefore, when the seal against the container wall (CI) is pressed, it is under Spannung.und it results in some elongation h; on the other hand, when the seal is pressed against the inner stop (C-2), it is under slight pressure _/ and there is a counteraction against the expansion. This combination of alternating compression and tensioning of the seal during the course of the movement cycles of the piston prevents permanent elongation of the seal, as well as wrinkling of the same, which under constant tension and constant rotation of the. Case would be. By bringing the circumferential length of the seal (C-4) and the actual circumferential length of the curved or sinusoidal surface (CJ) formed by the plates 26 in a valuable relationship to one another, there is always a certain amount of pressure in the seal when it is pressed against the sinusoidal part of the inner stop, and this compression counteracts the effect of a comparable expansion component if the seal is pressed against the outer stop after a similar working time *

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The desirable optimal condition is that the compression effect compensates for the expansion effect caused by shortening and lengthening the seal, so that additional years of operation are guaranteed in a wrinkle-free condition. In Pig. Figure 4 shows a gap G between the inner surface of the outer wall of the container and the outer surface of the piston structure, and this gap is referred to as the "operating" gap in which the seal must operate when the piston rises and inside the container falls. A second radial distance Gc is also indicated, referred to as the seal "pressure" gap, which is the radial distance from the relaxed position of the seal to the actual circumference of the domed stop surface, and roughly speaking this compression gap Gc should have a value , which is essential for the permissible pressure of the seal during operation of the gas container. In general, the circumference of the seal (C-4) is made slightly larger than the actual circumference (cj) of the curved stop. When the seal is relaxed, there is a third radial distance Gt which extends radially outward from the seal to the inner wall of the container _; and this distance represents a seal "stress" distance, and Gt is a value which is essential to the desired elongation of the seal during gas container operation to compensate for the compression of the seal.

The formation of the sinusoidal inner stop offers

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several advantages. First and foremost, it exhibits the convex Surfaces of the vertically arranged plates 26 facing inwards, so that the loads on the seal as tension can be counteracted. The plates are also connected in such a way that each plate carries the tensions In the two adjacent plates, and therefore equalize Is there a balanced tension in all plates? This balanced tension only transmits radially forces directed on the supporting frame uprights, around which the panels are mounted.

When assembled, the vertical seams of the plates 26 are completely accessible in the interior of the piston and can be installed by a person in a spatially unobstructed area. When assembling these panels, they are temporarily held by the bolts on the top of the uprights by simply swinging them to each upright 17 with the aid of a upright, and when the panels are gradually joined at their vertical flanges these flanges automatically drawn in vertical lines so that they fit exactly on the level line of the holes in the uprights 17 for dierBolzen 17a. This eliminates the need for the stands to be absolutely straight. The only exact position necessary for the spacing of the uprights is at their upper connections on the annular support 18. ·

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In operation, the construction of the sinusoidal portion of the inner stop is smooth and uninterrupted with no unsupported sealing area, such as would result from a full length vertical slot into which the seal can extend out of control and that smooth continuous surface also causes the seal to compress instead of forming gaps as any small area of the seal is pressed by the gas in the container against λ the stop surface.

While a preferred embodiment of the invention has been shown and described, it will be understood that the invention can be modified from the form shown, so that their scope is merely limited by the scope of the attached Claims is given.

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Claims (4)

Patent claims: 1. Dry seal pressurized gas container with a combination of a vertically reciprocating piston that forms the lid of the storage chamber of the container, with a sealing device for the piston with a flexible, curtain-like, cylindrical element made of gas-tight material, an outer stop with a pure smooth, vertical, cylindrical shape and one inner Stop having a first and a second part, the stops having two concentrically arranged stop surfaces, and these surfaces are arranged in such a relationship to one another and to the flexible element are that the oasis in the storage chamber has the flexible element in close engagement with the soling surfaces during the operating cycle of the piston press, d a -characterized by that the first k part of said inner stop is a support structure for the second part is and a-purely cylindrical Forms frame, the vertical uprights (17) and circular supports (16/18) and inward of the outer stop is arranged by a first radial distance, which is required for safe relative Back and forth movement of the two stops, the first radial distance representing an operating gap, the The second part of the inner stop is designed as a sinusoidal surface that is attached to the first part 9 09 826 / 0Kl BAD ORIGINAL . - 14 - and has an actual length that is pure cylindrical surface that corresponds to the outward from the first part of the inner stop in a second ■ ■ ν. radial clearance that is required to achieve the to compress the flexible element correctly and to have a slightly smaller circumference than the circumference of the flexible element Element, whereby this second distance represents a sealing pressure release. ■■■■■■ -;: ■■■; ■ ■ 2. dry seal compressed gas container according to claim 1, characterized in that the flexible element has the shape of a cylinder which is in a relaxed state is at a distance inwards from the outer stop, by a third radial distance that alternates for one correct stretching and compression of the sealing element is required and there is a sealing tension gap 3 * dry seal pressurized gas container according to the claims 1 or 2, characterized in that the sinusoidal surface has a number of plate elements, with one or more vertically spaced apart edges or arcuate parts in order to rest against one or to rest against a plurality of said stands and to move towards each side of each of the stands in a concave shape extend to adapt to the two adjacent plate elements, each of said plate elements - 15 - 9 O 9 B 2 o /0.1 Ak elements has flanges on its vertical edges and each pair of the mating flanges is bolted together to thereby form said To bring elements under tension and thereby to form a smooth surface for the seal. A dry seal pressure gas container as claimed in Claim J> characterized in that the vertically disposed edges or curved portions comprise a circumferential row which abut against each of the uprights and extend to either side of each of the uprights. - 16 - BAD GRIGWAL 909826/0 UI Le ersej te