EP1234784A1 - Vorrichtung zum Abdichten des Ringspalts zwischen einer Behälterinnenwand eines für eine Flüssigkeit bestimmten vertikalen Rundbehälters und einer Schwimmdecke - Google Patents
Vorrichtung zum Abdichten des Ringspalts zwischen einer Behälterinnenwand eines für eine Flüssigkeit bestimmten vertikalen Rundbehälters und einer Schwimmdecke Download PDFInfo
- Publication number
- EP1234784A1 EP1234784A1 EP02002693A EP02002693A EP1234784A1 EP 1234784 A1 EP1234784 A1 EP 1234784A1 EP 02002693 A EP02002693 A EP 02002693A EP 02002693 A EP02002693 A EP 02002693A EP 1234784 A1 EP1234784 A1 EP 1234784A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- arm
- spring
- pressure
- sealing ring
- floating
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D88/00—Large containers
- B65D88/34—Large containers having floating covers, e.g. floating roofs or blankets
- B65D88/42—Large containers having floating covers, e.g. floating roofs or blankets with sealing means between cover rim and receptacle
- B65D88/50—Large containers having floating covers, e.g. floating roofs or blankets with sealing means between cover rim and receptacle with resilient foam or stuffed seal
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D88/00—Large containers
- B65D88/34—Large containers having floating covers, e.g. floating roofs or blankets
- B65D88/42—Large containers having floating covers, e.g. floating roofs or blankets with sealing means between cover rim and receptacle
- B65D88/46—Large containers having floating covers, e.g. floating roofs or blankets with sealing means between cover rim and receptacle with mechanical means acting on the seal
Definitions
- the present invention relates to a device for sealing the annular gap between a container inner wall of a vertical round container intended for a liquid and a floating blanket, with a circumferential, attached to the inner wall of the container sealing ring, with a number lining up in the container circumferential direction Sliding / sealing body with sealing surfaces extending in the vertical direction, with at least one circumferential, the annular gap between the sealing ring and an outer wall the floating membrane bridging sealing membrane and with a variety on the circumference of the distributed floating cover and attached to this pressure units that the span the variable annular gap and the sealing ring at least on a first Press against the inner wall of the container, at least some of these pressure units have at least one base arm, which is arranged obliquely in the annular gap, extends between the sealing ring and the outer wall of the floating ceiling and at least on is in contact with the sealing ring or the outer wall of the floating ceiling and its angular position to the sealing ring changes when changing the annular gap width, the pressure of the Seal
- Such sealing arrangements are mainly found in large containers manufactured on site with vertical axis use, also as floating roof tanks or fixed roof tanks be designated. Such containers have a floating blanket by the Liquid is carried and which rises with the changing liquid level or decreases.
- the to seal the annular gap between the container wall and the edge of the Floating blanket sealing arrangements are used by the floating blanket worn by myself. Due to container ovalities and the eccentric floating position of the Floating blanket can be designed as a centrally designed annular gap floating roofs from about 150 to 300 mm to real annular gap widths in practice with extreme tank ovalities and an eccentric floating position of 500 to 600 mm.
- the sealing arrangement used does not only have the task that is in vertical and horizontal movement of the floating cover occurring variable gap effectively seal, but at the same time the floating blanket itself against the container jacket to center.
- floating blanket As far as spoken in the present description of floating blanket, so are including, on the one hand, indoor floating ceilings of fixed roof tanks and, on the other To understand floating roofs of floating roof tanks.
- a carrying and pressing device which consists of a four-armed, weight-loaded pressure scissors, which are used for sealing and centering of floating blankets can be used.
- a rod extends from a lower edge of the floating blanket diagonally upwards to that on the inside wall of the tank adjacent sliding plate.
- a second rod extends from the top edge of the Swim blanket sloping downward and is at the intersection with the first rod articulated. This second rod is then at a right angle to the container axis angled towards and carries at its lower end a weight that acts the force of gravity spreads this scissor assembly and thus the sliding plate or Press the sealing ring against the inside wall of the container.
- the change in the pressing forces of this The arrangement of scissors as the annular gap becomes narrower is degressive and leads to unsatisfactory centering of the swimming sheet. Also a pressure is on the level of the liquid level is not provided.
- US Pat. No. 3,261,496 shows a sealing arrangement in which the individual support and pressure devices press a sliding plate of low height against the container wall and also carry a weather plate in the desired position over the ring gap.
- This The arrangement has a type of Y-shaped spring.
- As the lower pressure of the slide plate another, separately arranged leaf spring is used.
- This structure is so disadvantage that it is designed very stiff and the pressure springs too large forces exercise.
- the Y-shaped spring combination only presses against the upper end of the slide plate and, because it is firmly connected to the edge of the sliding plate, causes a deformation of the sliding plate with changing annular gap widths.
- a sealing arrangement is made using a three-armed pressure shear known, the scissors by a arranged in their center and against a support arm supporting coil spring is tensioned.
- the pressing of the Sliding plate in a second, lower area is made by additional, V-shaped spiral springs.
- Such an arrangement forms the preamble of claim 1.
- the effect of relatively small coil spring is low and the pressing forces of the scissors are only on directed a point.
- the increase in force of the spiral coil spring when the gap is reduced is slightly degressive and the force curve of the additional leaf spring is strongly degressive. It follows that this sealing arrangement with a relatively high effort for the pressure system does not provide a favorable force distribution against the sealing ring.
- the invention has for its object a device for sealing the annular gap of the type mentioned in such a way that the disadvantages mentioned above be avoided, and in particular high centering forces with a progressive increase in force with reduction of the annular gap, high buckling and buckling stability as well as support capacity have large annular gaps and which can be produced at low cost.
- a device for sealing the annular gap between a container inner wall of a round container intended for a liquid and one Floating blanket according to the features of claim 1.
- the device is thereby characterized in that the at least one first spring element at least part of a the first pressure arm, which forms the sealing ring at a second point, that of the first Is spaced, presses against the container wall that the first pressure arm with the Base arm is non-positively connected and the angular direction and length of the first pressure arm are dimensioned such that the first pressure arm with all annular gap widths extends in relation to the base arm in the opposite direction to the sealing ring and slidably engages the sealing ring, and the base arm being changed by changing the annular gap performs a rotational movement in a first direction of rotation and the first pressure arm one Rotational movement in a second direction of rotation opposite to the first direction of rotation performs.
- the spring and centering forces not only due to the changing spring tension an annular gap reduction, but also due to the changing Position of the base arm, which is inclined in the annular gap between the swimming sheet and Sealing ring runs.
- the base arm on which the spring element is held exerts a torque on the spring arm, such that when the gap becomes smaller, the change in position of the base arm additionally prestresses the spring arm.
- the torques are in horizontal forces converted.
- additional spring bars can be provided and designed so that they from a certain ring gap reduction, additional spring forces through elastic to cause plastic deformation.
- the individual spring elements can run straight or also one or more times be angled. These spring elements are each with other straight or angled Bars firmly connected to a carrying and / or pressing device and functional combined.
- a second spring element is provided, which at least forms part of a second pressure arm which is non-positively connected to the base arm connected is.
- the angular direction and length of the second pressure arm becomes such dimension that the second pressure arm in relation to the Base arm extends in the opposite direction to the outer wall of the floating ceiling and attacks on it.
- a first spring element and a second spring element are advantageously approximately in attached to the base of the middle of the annular gap. This results in a compact Construction and high pressure forces at low pressure device costs.
- Both the first and the second pressure arm are expediently used as spring bars educated.
- first and / or the second pressure arm can be rigid Include arm part and a resilient arm part.
- By dividing the pressure arm can further useful spring elements, such as spiral springs or torsion spring bars, come into use.
- the first spring element and the second spring element can simplify a continuous Form spring arm, which is attached approximately in the middle of the spring arm in the middle of the base arm. One end of the continuous spring arm is then supported against the sealing ring and that the other end of the spring arm presses against the outer wall of the floating ceiling. This arrangement brings further advantages of spring design and fastening as well as cost advantages.
- a cross member can be provided with its Center and is attached at right angles to the base arm.
- This cross section serves as Carrier to the first and / or the second spring element at the two ends of the cross member and a corresponding to this first and / or this second spring element to attach another first and / or second spring element.
- the base arm can also be designed as a spring bar, provided the size of the Changes in the annular gap and the magnitude of the vertical forces to be expected enable one safe dimensioning of the base arm.
- the pressure arms can be used for vertical support at the same time as the base arms the sealing arrangement can be used.
- a bending knee in the form of a U-shaped, resilient arm part can be provided on the base arm be, the free end of the bending knee on the sealing ring or the The outer wall of the floating ceiling is attached.
- Such a bending knee forms a kind of resilient, a spring force exerted on the sealing ring hinge, which is always tight ring gap.
- the free end of the resilient pressure arm can be rolled up semicircular.
- the diameter of the semicircle should be larger than the smallest, desired or expected annular gap width, thus a strong centering force from the curled in before the smallest annular gap width is reached Spring end runs out.
- the end sliding against the sealing ring or the outer wall of the floating ceiling the pressure arm can be guided through a safety catch, such a safety catch is attached to the sealing ring or the outer wall of the floating ceiling in a way and way that the pressure arm in its movement perpendicular to its longitudinal axis is fixed and can move in the direction of its longitudinal axis.
- a safety catch ensures that vertical forces are exerted between the sealing ring by the pressure arms and floating blanket can be transferred.
- the first and the second pressure arm can have two legs of an X-shaped arrangement form, the two other legs of the X-shaped arrangement then the base arm form.
- a pressure arm and a base arm leg can be used in such a structure form a V-shaped unit, the legs of the one unit the Seal ring and the legs of the other unit of the floating ceiling outer wall be assigned.
- Two X-shaped pressure units can also be arranged one directly behind the other in their longitudinal axis be arranged, the two adjacent to the outer wall of the floating ceiling Spring arms have a connecting web and the attachment of the two pressure units with the floating ceiling outer wall on the connecting web.
- This XX-shaped Arrangement is suitable for horizontal arrangement in the annular gap and allows one space-saving arrangement.
- the spring bars can be made of spring-hard steel strip are and preferably have a thickness between 2-3 mm.
- FIG. 1 A device for sealing the annular gap between a container wall 2 a Round container 1, which is filled with a liquid 3, and one above the liquid level, designated with the reference number 4, floating floating blanket 5 is shown in Figure 1.
- this floating blanket 5 there is the edge area of the Floating blanket made of a typical ring pontoon, consisting of a lower floor 6, a upper floor 7 and a floating ceiling outer wall 8 is constructed.
- the floating blanket 5 is dimensioned with respect to its diameter so that between the floating ceiling outer wall 8 and the container wall 2 remain an annular gap 9.
- This annular gap 9 is required so that the floating cover 5 among the different Liquid levels 4 can freely float up and down.
- individual Sealing arrangements designated 10, arranged a sealing ring 11, also as Designated sliding plate, press against the inside of the container wall 2.
- This sealing ring 11 lies flat against the inner wall of the round container 1.
- Such a sealing arrangement 10 comprises a support arm or base arm 12, which is from the center of the floating ceiling outer wall 8 obliquely upwards over the annular gap 9 extends to the upper region of the sliding plate 11.
- This base arm 12 is on the Floating ceiling outer wall 8 and the sliding plate 11 each arranged there Bearing bracket 13 or support bracket 15 and an axis 14 or 16 in the form of a Bar held, the respective axis 14, 15 in a vertically aligned Slightly move the slot.
- On the base arm 12 is on a cross member 18 first pressure arm 17 fastened by means of screw connection 19. This attachment point on the cross member 18 is located at the lower end of the base arm 12 near the bracket 13.
- the first pressure arm 17 itself is made of a first spring element 17a extends to the lower area of the sealing ring 11 and extends there with a skid Bent end 17b creates, and two arcuate spring parts 17c and 17d constructed in the area of the screw connection 19.
- the two arcuate spring parts 17c and 17d form a clockwise or clockwise rotation Loop or indentation, which is a corresponding bias of the first spring element 17a exercises.
- This first pressure arm 17 is made of a spring-hard steel strip, preferably with a thickness of about 2 mm and a width of 40 to 80 mm.
- this V-shaped arrangement is shown of the base arm 12 and the first pressure arm 17 a pressure force of the sliding plate 11 both in the upper area of the sliding plate 11 and in the lower area at height of the liquid level 4 obtained.
- the annular gap 9 is in the upper area with a sealing membrane 20 sealed at the upper edge of the sliding plate 11 with a clamping profile 21 with a Screw connection 22 and at a floating ceiling edge bracket 25 with a Clamp profile 23 and a screw connection 24 is attached.
- FIG. 2 shows a further embodiment of a sealing arrangement, designated 30, shown.
- the sealing arrangement 30 of FIG. 2 has a base arm 32 which is the base arm 12 in FIG. 1 corresponds and accordingly obliquely in the annular gap 9 from the lower region the floating ceiling outer wall 8 runs in the direction of the container wall 2.
- the sliding plate, designated 31 in FIG. 2 is only approximately half the height of the outer swimming pool wall 8 dimensioned accordingly.
- a sealing membrane 42 closes, which bears against the container wall 2 and backed by a foam cushioning element 43 and by a receiving profile 40 is worn.
- the sealing membrane 20 is by means of Clamp profile 44 and screw connection 45 held.
- a Cross member 18 attached, each with a left and a right section evenly overhangs the base arm 32, perpendicular to it.
- this cross member 18 is a downwardly extending first spring arm 37 and an upwardly extending second spring arm 38 is arranged.
- the first one Spring arm 37 and the respective second spring arm 38 are connected via an intermediate piece 39, formed in one piece, connected, the attachment to this intermediate piece 39 the cross member 19 by means of screw connections 19.
- Figure 2 are the two sections of the base arm 32, which extend on both sides of the cross member 18, designated 32a and 32b.
- the two ends of the base arm are by means of support bracket 15 and axis 16 on the receiving profile 40 and by means of a pedestal 13 and axis 14 attached to the lower region of the outer wall 8 of the floating ceiling.
- the base arm 32 forms with its two sections 32a and 32b and the spring arms 37 and 38 an X-shaped arrangement. It is recognizable that when the annular gap 9 narrows, the base arm 32 its angular position changed so that it is steeper in the annular gap 9, whereby a Rotational movement is exerted on the cross member 18 and the spring arms 37 and 38 Experience torque and be biased clockwise. Experience at the same time the spring arms 37 and 38 an additional tension due to the tightening Annular gap 9, so that they are also slanted in the annular gap. The increased spring tension is in turn transmitted to the base arm 32 via the cross member 18.
- a base arm 62 obliquely in the annular gap 9 of the Outside of the floating ceiling 8 up to a fastening point with a support bracket 15 and axis 16 used continuously.
- the lower end of the base arm 62 is in shape a runner 62c and is formed in a vertical U-guide profile 63 led that the skids 62c move in the vertical direction within the U-profile 63 can.
- This cross member is, as shown in the embodiment of Figure 2, on both sides of the base arm 62 in front of this.
- a downwardly and obliquely to the sealing ring 11 first spring arm 71 and an up and to the floating ceiling outer wall 8 extending second spring arm 73 fastened is at both ends of this cross member 18 via an intermediate piece 72, a downwardly and obliquely to the sealing ring 11 first spring arm 71 and an up and to the floating ceiling outer wall 8 extending second spring arm 73 fastened, only in FIG front spring arm arrangement consisting of sections 71, 72 and 73 can be seen is.
- the respective ends of the first spring arm 71 and the second spring arm 73 are rolled up or designed as skids; the rolled end of the first spring arm 71 is denoted by 71b.
- the principle of this scissor arrangement is based on that with changing, narrowing ring gap both by changing the Angular position of the base arm 62 and by reducing the annular gap 9 each a biasing component of the spring arms 71 and 73 is effected and horizontally effective forces at all end points of the spring arms 71 and 73 and the base arm 62a and 62 arise.
- the sliding plate or the sealing ring 11 is both in the area of the support bracket 15 and in the area of the rolled-up spring arm part 71 b against the container wall pressed. From a certain, minimum annular gap 9, the free end of the curled spring arm part 71 b against the floating ceiling outer wall 8 and performs a strong resistance to further ring gap reduction.
- the curled up end 71b of the spring arm 71 thus replaces an otherwise necessary construction part Minimum limitation of the annular gap 9.
- the spring end 71b of the spring arm 71 is selected to be larger than the smallest, aimed for Annular gap width 9.
- the Y-shaped used in this third embodiment Scissor support structure 62a, 62b, 67 enables a low overall height of the support and pressure unit.
- FIG 4 is a seal assembly 90 of a fourth embodiment with an X-shaped Structure of the support and pressure unit, shown in a side view.
- Base arm 91 which works in terms of its operation with those based on embodiments 1 to 3 described base arms is comparable, is at both ends with one Bend knees 91b and 91d, with which he on the one hand on the sealing ring 11 (via the Bend knee 91b) by means of screw connection 94 and on the other hand on the floating ceiling outer wall 8 (bending knee 91d) is firmly screwed by means of screw connection 95.
- screw connection 95 At the lower fitting 95 is also the primary sealing membrane 74, which is also in Figure 3 is shown attached.
- the base arm 91 in the form of the leaf spring bar additionally has a reinforcement spring 92 in the form of a doubling, which follows the bending knee 91b up to the Screw connection 95 extends. Due to the cross part 18, which is again present the base arm 91 is divided into an upper section 91a and a lower section 91c. On the cross member 18 are at each end extending downward first spring arm 97 via an intermediate piece 98 and a second one, which extends upwards second spring arm 99 attached, the second spring arm 99 a curled End 99b and the first spring arm 97 with an unspecified skid is provided.
- this structure of the sealing arrangement 90 corresponds to that the third embodiment shown in Figure 3, but without the scissor suspension element 67, which is provided in the embodiment of FIG to hang on its lower end only slidingly guided base arm 62.
- One embodiment as shown in Figure 4 has the advantage that all the support elements can simultaneously generate pressure forces (this results in a cost advantage) and due to the use of the bending knee, a compact design even with large annular gaps is possible.
- an XX-shaped pressure unit is general in a side view in FIG designated by the reference numeral 145, shown, which are additionally used can to achieve a pressure point in the lower region of the sealing ring 11; this The pressure point lies below the liquid level 4 in the round container 1 filled liquid 3.
- This XX-shaped pressure unit 145 is explained in more detail with reference to the in Figure 8 illustrated eighth embodiment described below.
- the seal assembly, designated 110, shown in Figure 5 and a fifth Embodiment represents, is in its structure and in its operation with the arrangement comparable to the fourth embodiment in FIG. 4. While in the fourth embodiment the base arm 91 and the respective two first spring arms 97 and the respective second spring arms 99 are interconnected via the cross member 18 is in the fifth embodiment of Figure 5, the cross member 18 omitted.
- the entire, X-shaped The support and pressure unit is composed of two V-shaped parts.
- the a, V-shaped angled spring rod has an upper leg 111a, the upper Section of the base arm, and a lower portion 111b, which is a first Spring arm forms.
- This base arm portion 111a is provided with an end portion 111c Screw connection 114 is firmly connected to the upper region of the sealing ring 11.
- the lower part 111b of the spring bar lies with a slide shoe, not specified sliding on the sealing element 11.
- the second, V-shaped angled spring bar comprises an upper spring bar section 113a, one second spring arm, comparable to the second spring arm 73 in FIG. 3 or the second spring arm 99 in Figure 4, forms and slides on the floating ceiling outer wall 8 rests in the upper area, while the second spring rod section 113b forms the lower part of the base arm and via a bending knee 113c and a screw connection 95 firmly on the floating ceiling outer wall 8 above the liquid level 4 connected is. All parts of the sections 111a and 113b forming the base arm and the first spring arm 111b and second spring arm 113a are made of a spring-hard Steel band made.
- the lower base arm portion 113b has a reinforcement spring 112 reinforced; this reinforcement spring 112 extends approximately to the middle the upper base arm portion 111a.
- the two V-shaped arrangements are over one Screw connection 116 connected to one another to form the X-shaped arrangement shown in FIG.
- the reinforcement spring can be attached by means of an additional screw connection 115 be connected at its upper end to the base arm portion 111a while, also having a bending knee 112c, together with the bending knee 113c on the attached lower end via the screw 95 on the floating ceiling outer wall 8 is.
- the fifth embodiment according to FIG. 5 offers the advantage that it can be pushed into one another the V-shaped spring bars a simple, compact and inexpensive construction the carrying and pressing unit becomes possible.
- FIG. 6 A sealing arrangement according to a sixth embodiment is shown in FIG. 6 and generally designated by reference numeral 120.
- reference numeral 120 In contrast to Figures 1 up to 5 here is the section of a typical swimming blanket in an open pan construction shown for a fixed roof tank. Therefore, the upper floor 7 and the reference number are missing 122, a stiffening plate of the floating ceiling outer wall 8 is shown.
- a such a floating blanket has only about half the wall height of the wall 8 compared to the Embodiments of Figures 1 to 5.
- This sixth embodiment sets accordingly the fifth embodiment, one composed of two V-shaped angled spring bars X-shaped support and pressure unit.
- the lower, angled spring rod designated by reference number 126, forms with its one leg a lower one on the outer wall of the floating ceiling 8 adjacent portion 126c of the obliquely upward to the sealing ring 11 extending Base arm, while the other leg of the spring rod 126 is inclined forms downwardly extending portion 126a of the first spring arm.
- the left leg 123a forms the upper section in a V-shaped angled spring bar 123 of the base arm, while the right leg 123c represents the second spring arm.
- This section 123c is fixed via a screw connection 125 on the upper area the floating ceiling outer wall 8 attached.
- the leg 123a has a designated 123b Bend knee, the end with a screw connection 124 in the upper area the floating blanket 11 is attached.
- the two V-shaped spring parts 123 and 126 are with parts of sections 123a and 126c lying one above the other by means of screw connections 19 connected. With 123d and 126b, the two bending knees of the V-shaped angled spring bars Designated 123 and 126. This arrangement with a relatively simple and inexpensive The design of the support and pressure unit is suitable for light floating covers low height.
- FIG. 7 as in FIG. 6, a sealing arrangement is also designated by the reference symbol 130, for use on a light floating blanket for a fixed roof tank shown.
- a sealing arrangement is also designated by the reference symbol 130, for use on a light floating blanket for a fixed roof tank shown.
- FIG. 2 Comparable with FIG. 2, there is the one lying against the container wall 2
- Sealing ring made of a sliding plate 31 arranged in the area of the liquid 3 and a sealing membrane 42 arranged above, through a foam cushion element 43 and a receiving profile 40 which is connected to the sliding plate 31 by screw connections 41 is connected, is held in a vertical position.
- the arrangement as shown in FIG. 8 in plan view comprises two X-shaped units, formed from two W-shaped spring bars, each of these units with the arrangement according to FIG. 5 is in principle comparable.
- Any of these X-shaped Unit includes one composed of legs 141b and 151b Base arm and a first spring arm 151a and a second spring arm 141a, which by means of Screw connection 156 are connected.
- Each W-shaped subunit, assembled each from parts 151a, 151e, 151b, 151a, 151b and parts 141b, 141a, 141d, 141a, 141b, comprises a bending knee, not specified.
- the connecting bridge 151e is shown with the sliding plate, which is shown in FIG.
- the connecting bridge 141d is attached to the floating ceiling outer wall 8 by means of screw connection 142.
- the first spring arm 151a has a rolled end 151d, which is in a safety catch 134 is guided so that this rolled-up spring end is horizontal, i.e. in the drawing plane in Figure 8.
- section 141b which is the right part of the base arm, which is also guided in such a safety bracket 134.
- This arrangement not only has the function of pressing and centering, but also carries the sealing ring consisting of parts 31, 31a, 40, 42, 43.
- the further advantage of this Arrangement is that at a low height of the floating ceiling outer wall 8 a A variety of effective pressure units can be accommodated, making a high effective sealing arrangement is created.
- FIG. 9 shows an eighth embodiment of a pressure unit, in the horizontal arrangement, in the annular gap 9, comparable to Figure 8, with two X-shaped units, however have no carrying function.
- the seventh embodiment according to Figure 8 is therefore only the second spring arm 141a, with the connecting web 141d on the floating ceiling outer wall 8 by means of screw connections 142, while the base arm portion 141b with a slide shoe on the floating ceiling outer wall 8 is present.
- the other two legs of the respective X-shaped units i.e. a spring arm 143b forming the second part of the base arm and the leg 143a, which forms the first spring arm, lie with the rolled-in spring end 143d and an unspecified sliding shoe on the sliding plate 31.
- the two X-shaped ones Units are made from two V-shaped and one W-shaped angled spring bar and screwed together by means of the screw connections 144 over a partial section. Such an arrangement, as shown in FIG. 9, is then used if by means of this pressure unit there are no vertical forces between the floating cover and Sealing ring to be transferred, the vertical forces from another structural part are to be transferred.
- the spring arrangements shown in Figures 6 and 7 are particularly suitable to achieve low overall heights of the sealing arrangement, as is the case with indoor floating ceilings fixed roof tanks.
- Indoor floating ceilings have typical heights of about 400 mm, with annular gap widths of 200 mm.
- floating roofs have a height of about 900 mm with annular gap widths, which are also in the range of 200 mm.
Abstract
Description
- Trag- und Andruckeinheiten
- ein behälterwandseitig anliegendes, ringförmig geschlossenes Kontaktelement, z.B. in der Form von Gleitblechen
- mindestens eine, den Ringspalt zwischen Kontaktelement und Schwimmdecke überspannende, flexible Dichtungsmembran.
- Es können hohe Zentrierungkräfte mit progressivem Kraftanstieg bei geringer Spaltverkleinerung erhalten werden.
- Die beiden Stellen, an denen der Basisarm einerseits und das mindestens erste Federelement andererseits an die Gleit- und Dichtkörper andrücken, können weit voneinander beabstandet werden, was eine ausgezeichnete Verteilung der Andruckkräfte mit sich bringt.
- Durch den Basisarm wird eine Grundstabilität und damit auch eine Beul- und Knickstabilität erreicht.
- Die Anzahl der benötigten Konstruktionselemente kann gering gehalten werden, woraus sich geringe Herstellkosten ergeben.
- Figur 1
- einen Ausschnitt eines Rundbehälters im Bereich dessen Wand sowie einen Teil der auf dem Flüssigkeitsspiegel aufschwimmenden Schwimmdecke, gemäß einer ersten Ausführungsform einer Vorrichtung zum Abdichten des Ringspalts zwischen Behälterinnenwand und Schwimmdecke,
- Figur 2
- eine weitere Vorrichtung zum Abdichten des Ringspalts entsprechend einer zweiten Ausführungsform in einer perspektivischen Ansicht,
- Figur 3
- eine Darstellung, entsprechend der Figur 1, einer dritten Ausführungsform einer Vorrichtung zum Abdichten des Ringspalts,
- Figur 4
- eine weitere Schnittdarstellung, die eine vierte Ausführungsform zeigt,
- Figur 5
- eine wiederum perspektivische Darstellung mit einer fünften Ausführungsform,
- Figur 6
- eine sechste Ausführungsform in einer Schnittdarstellung,
- Figur 7
- eine siebte Ausführungsform, wobei gegenüber den Ausführungsformen in den Figuren 1 bis 6 die Trag- und Andruckteile horizontal in dem Ringspalt verlaufen,
- Figur 8
- eine Ansicht auf den Ringspalt, von oben gesehen, mit horizontal im Ringspalt angeordneten, X-förmigen Andruck- und Trageinheiten gemäß einer siebten Ausführungsform, und
- Figur 9
- eine Anordnung, die mit der Ausführungsform, die in Figur 8 dargestellt ist, vergleichbar ist, allerdings geringfügig modifiziert, gemäß einer achten Ausführungsform.
Claims (17)
- Vorrichtung zum Abdichten des Ringspalts zwischen einer Behälterinnenwand eines für eine Flüssigkeit bestimmten vertikalen Rundbehälters und einer Schwimmdecke, mit einem umlaufenden, sich an die Behälterinnenwand anlegenden Dichtring, mit einer Anzahl sich in Behälterumfangsrichtung aneinanderreihende Gleit/Dichtkörper mit sich in vertikaler Richtung erstreckenden Dichtflächen, mit mindestens einer umlaufenden, den Ringspalt zwischen Dichtring und einer Außenwand der Schwimmdecke überbrückenden Dichtmembran und mit einer Vielzahl am Umfang der schwimmenden Abdeckung verteilten und an dieser befestigten Andruckeinheiten, die den variablen Ringspalt überspannen und den Dichtring jeweils mindestens an einer ersten Stelle gegen die Behälterinnenwand drücken, wobei mindestens einzelne dieser Andruckeinheiten mindestens einen Basisarm aufweisen, der schräg im Ringspalt angeordnet ist, sich zwischen Dichtring und Schwimmdecken-Außenwand erstreckt und zumindest an dem Dichtring oder der Schwimmdecken-Außenwand anliegt und dessen Winkelstellung zum Dichtring sich bei Änderung der Ringspaltweite ändert, wobei die Andrückung des Dichtrings durch mindestens ein erstes Federelement unterstützt wird und wobei das erste Federelement und der Basisarm derart miteinander verbunden sind, daß bei enger werdendem Ringspalt die Andruckkraft gegen den Dichtring erhöht wird,
dadurch gekennzeichnet, daß das mindestens eine erste Federelement (17; 37; 71; 97; 111b; 126a; 143a; 151a) zumindest einen Teil eines ersten Andruckarmes (17; 37; 71; 97; 111b; 126a; 143a; 151a) bildet, der den Dichtring (11; 31, 31a, 40, 40a, 42, 43; 31) an einer zweiten Stelle, die von der ersten Stelle beabstandet ist, gegen die Behälterwand (2) drückt,
daß der erste Andruckarm (17; 37; 71; 97; 111b; 126a; 143a; 151a) mit dem Basisarm (12; 32; 62; 91, 92; 111a, 112a, 112b, 113b; 123, 126; 141b, 143b; 141b, 151b) kraftschlüssig verbunden ist und die Winkelrichtung und Länge des ersten Andruckarms (17; 37; 71, 97; 111b; 126a; 143a; 151a) derart bemessen sind, daß sich der erste Andruckarm (17; 37; 71; 97; 111b; 126a; 143a; 151a) bei allen Ringspaltweiten in Relation zu dem Basisarm (12; 32; 62; 91, 92; 111a, 112a, 112b, 113b; 123, 126; 141b, 143b; 141b, 151b) in entgegengesetzter Richtung zu dem Dichtring (11; 31, 31a, 40, 40a, 42, 43; 31) hin erstreckt und gleitend an dem Dichtring angreift,
und wobei unter Ringspaltänderung der Basisarm (12; 32; 62; 91, 92; 111a, 112a, 112b, 113b; 123, 126; 141b, 143b; 141b, 151b) eine Drehbewegung in einer ersten Drehrichtung ausführt und der erste Andruckarm (17; 37; 71, 97; 111b; 126a;143a; 151a) eine Drehbewegung in einer zweiten Drehrichtung entgegengesetzt zu der ersten Drehrichtung ausführt. - Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß ein zweites Federelement (38; 73; 99, 113a; 123c; 141b) zumindest einen Teil eines zweiten Andruckarms (38; 73; 99; 113a; 123c; 141b) bildet, der mit dem Basisarm (12; 32; 62; 91, 92; 111a, 112a, 112b, 113b; 123, 126; 141b, 143b; 141b, 151b) kraftschlüssig verbunden ist, und die Winkelrichtung und Länge des zweiten Andruckarms (38; 73; 99; 113a; 123c; 141b) derart bemessen sind, daß sich der zweite Andruckarm bei allen Ringspaltweiten in Relation zu dem Basisarm (12; 32; 62; 91, 92; 111a, 112a, 112b, 113b; 123, 126; 141b, 143b; 141b, 151b) in entgegengesetzter Richtung zur Schwimmdecken-Außenwand (8) hin erstreckt und an dieser angreift.
- Vorrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß der erste (17; 37; 71, 97; 111b; 126a; 143a; 151a) und/oder der zweite (38; 73; 99; 113a; 123c; 141b) Andruckarm ein Federstab ist (sind).
- Vorrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß der erste (17; 37; 71, 97; 111b; 126a; 143a; 151a) und/oder der zweite (38; 73; 99; 113a; 123c; 141b) Andruckarm einen biegesteifen Armteil und einen federnden Armteil umfaßt (umfassen).
- Vorrichtung nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß der erste Andruckarm (17; 37; 71, 97; 111b; 126a; 143a, 151a) etwa in der Mitte der Ringspaltweite an dem Basisarm (12; 32; 62; 91, 92; 111a, 112a, 112b, 113b; 123, 126; 141b, 143b; 141b, 151b) befestigt ist.
- Vorrichtung nach einem der Ansprüche 2 bis 5, dadurch gekennzeichnet, daß der zweite Andruckarm (38; 73; 99; 113a; 123c; 141b) etwa in der Mitte der Ringspaltweite an dem Basisarm (12; 32; 62; 91, 92; 111a, 112a, 112b, 113b; 123, 126; 141b, 143b; 141b, 151b) befestigt ist.
- Vorrichtung nach Anspruch 2, dadurch gekennzeichnet, daß das eine erste Federelement (37; 71; 97) und das zweite Federelement (38; 73; 99) einen durchgehenden Federarm (37, 38, 39; 71, 72, 73; 97, 98, 99) bilden, der etwa in Federarmmitte mittig an dem Basisarm (12; 32; 62; 91, 92; 111a, 112a, 112b, 113b, 123, 126; 141b, 143b; 141b, 151b) befestigt ist, wobei sich ein Ende des durchgehenden Federarms (37, 38, 39; 71, 72, 73; 97, 98, 99) gegen den Dichtring (11; 31, 31a, 40, 40a, 42, 43; 31) und das andere Ende des Federarms gegen die Schwimmdecken-Außenwand (8) abstützt.
- Vorrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß ein Querteil (18) vorgesehen ist, das mit seiner Mitte und rechtwinklig an dem Basisarm (32) befestigt ist, wobei das erste und/oder das zweite Federelement (37, 38) an dem einen Ende des Querteils (18) gehalten ist und zu diesem ersten und/oder diesem zweiten Federelement ein entsprechendes weiteres erstes und/oder zweites Federelement (37, 38) an dem anderen Ende des Querteils (18) gehalten ist.
- Vorrichtung nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, daß der Basisarm (12; 32; 62; 91, 92; 111a, 112a, 112b, 113b; 123, 126; 141b, 143b; 141b, 151b) ein Federstab ist.
- Vorrichtung nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, daß der Basisarm (91, 92; 111a, 112a, 112b, 113b; 123, 126) ein Biegeknie (91b; 91d; 112a, 113c; 123b) in Form eines U-förmigen, federnden Armteils aufweist und das freie Ende des Biegeknies an dem Dichtring (11) oder der Schwimmdecken-Außenwand (8) befestigt ist.
- Vorrichtung nach Anspruch 3, dadurch gekennzeichnet, daß das freie Ende (71 b; 99b; 143d; 151d) des Andruckarms (71; 99; 143a; 151a) halbkreisförmig eingerollt ist, wobei der Durchmesser des Halbkreises größer ist als die kleinste angestrebte Ringspaltweite.
- Vorrichtung nach Anspruch 3, dadurch gekennzeichnet, daß das an dem Dichtring (31, 31a, 40, 40a, 42, 43; 31) oder an der Schwimmdecken-Außenwand (8) gleitend anliegende Ende des Andruckarms (131d; 141b; 151a, 151d) durch einen Fangbügel (134) geführt ist, wobei der Fangbügel (134) an dem Dichtring (31, 31a, 40, 40a, 42, 43; 31) oder der Schwimmdecken-Außenwand (8) befestigt ist, so daß der Andruckarm (131d; 141b; 151a, 151d) in seiner Bewegung senkrecht zu seiner Längsachse festgelegt ist und sich in Richtung seiner Längsachse verschieben kann.
- Vorrichtung nach Anspruch 3, dadurch gekennzeichnet, daß der erste (17; 37; 71; 97; 111b; 126a; 143a; 151a) und der zweite (38; 73; 99; 113a; 123c; 141b) Andruckarm zwei Schenkel (37, 38; 71, 73; 97, 99; 111b, 113a; 126a, 123c; 143a, 141a; 151a, 141a) einer X-förmigen Anordnung bilden, wobei die beiden anderen Schenkel (32a, 32b; 62a, 62b; 91a/92a, 91c/92c; 111a/112a, 112b/113b; 123a; 126c; 143b, 141b; 151b, 141b) der X-förmigen Anordnung den Basisarm (32; 62; 91, 92; 111a, 112a, 112b, 113b; 123a, 123b, 126c; 143b, 141b; 151b, 141b) bilden.
- Vorrichtung nach Anspruch 13, dadurch gekennzeichnet, daß jeweils ein Andruckarm- (111 b; 113a) und ein Basisarm-Schenkel (111a, 112a; 112b, 113b) eine V-förmige Einheit (111a, 112a, 111b; 113a, 112b, 113b) bilden, wobei die Schenkel (111a, 112a; 111 b) der einen Einheit dem Dichtring (11) zugeordnet sind und die Schenkel (113a; 113b, 112b) der anderen Einheit der Schwimmdecken-Außenwand (8) zugeordnet sind.
- Vorrichtung nach Anspruch 13, dadurch gekennzeichnet, daß zwei X-förmige Andruckeinheiten in ihrer Längsachse direkt hintereinander angeordnet sind, wobei die beiden an der Schwimmdecken-Außenwand (8) benachbarten Federarme (141a, 141a) einen Verbindungssteg (141d) aufweisen und die Befestigung der beiden Andruckeinheiten mit der Schwimmdecken-Außenwand (8) an dem Verbindungssteg (141d) erfolgt.
- Vorrichtung nach Anspruch 13, dadurch gekennzeichnet, daß zwei X-förmige Andruckeinheiten in ihrer Längsachse direkt hintereinander angeordnet sind, wobei die jeweils benachbarten Federarme/Basisarm-Schenkel (141a, 141a/151b, 151b) an der Schwimmdecken-Außenwand (8) und an dem Dichtring (31) je einen Verbindungssteg (141d; 151e) aufweisen und wobei die Befestigung der Andruckeinheiten mit der Schwimmdecke an dem schwimmdeckenseitigen Verbindungssteg (141d) erfolgt und der Verbindungssteg (151e) am Dichtring (31) in einem Fangbügel (152) geführt ist.
- Vorrichtung nach Anspruch 3, dadurch gekennzeichnet, daß die Federstäbe aus federhartem Stahlband gefertigt sind und vorzugsweise eine Dicke zwischen 2 - 3 mm aufweisen.
Applications Claiming Priority (2)
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DE10108320 | 2001-02-21 | ||
DE2001108320 DE10108320A1 (de) | 2001-02-21 | 2001-02-21 | Vorrichtung zum Abdichten des Ringspalts zwischen einer Behälterinnenwand eines für eine Flüssigkeit bestimmten vertikalen Rundbehälters und einer Schwimmdecke |
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EP1234784B1 EP1234784B1 (de) | 2005-11-30 |
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Cited By (3)
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WO2004060775A1 (en) * | 2002-12-16 | 2004-07-22 | Chicago Bridge & Iron Company | Spring-loaded secondary seal for floating-roof storage tank |
US7748555B2 (en) | 2002-12-16 | 2010-07-06 | Chicago Bridge & Iron Company | Spring-loaded secondary seal for floating-roof storage tank |
CN112441340A (zh) * | 2019-08-29 | 2021-03-05 | 香港恒展国际有限公司 | 一种内浮盘周边的密封装置 |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
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CN111483712B (zh) * | 2019-01-25 | 2022-03-01 | 中国石油天然气集团有限公司 | 一种外浮顶储罐二次密封的密封装置和外浮顶储罐 |
CN113734633A (zh) * | 2020-05-28 | 2021-12-03 | 中国石油化工股份有限公司 | 一种内浮盘边缘密封装置 |
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US2696930A (en) * | 1951-08-24 | 1954-12-14 | Chicago Bridge & Iron Co | Seal hanger for floating roof tanks |
US2803371A (en) * | 1954-07-22 | 1957-08-20 | Southwest Welding & Mfg Compan | Floating roof seal construction |
US2829795A (en) | 1954-09-07 | 1958-04-08 | Chicago Bridge & Iron Co | Sealing ring for floating roof storage tanks |
DE1026239B (de) * | 1955-10-19 | 1958-03-13 | Dortmunder Union Brueckenbau | Dichtungsvorrichtung an Schwimmdecken |
US3185335A (en) * | 1961-11-24 | 1965-05-25 | Levivier Sa Des Ets | Sealing means for a liquid-storing reservoir having a floating roof |
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WO2004060775A1 (en) * | 2002-12-16 | 2004-07-22 | Chicago Bridge & Iron Company | Spring-loaded secondary seal for floating-roof storage tank |
US7044322B2 (en) | 2002-12-16 | 2006-05-16 | Chicago Bridge & Iron Company | Spring-loaded secondary seal for floating-roof storage tank |
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CN112441340A (zh) * | 2019-08-29 | 2021-03-05 | 香港恒展国际有限公司 | 一种内浮盘周边的密封装置 |
Also Published As
Publication number | Publication date |
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DE10108320A1 (de) | 2002-09-12 |
EP1234784B1 (de) | 2005-11-30 |
DE50205074D1 (de) | 2006-01-05 |
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