EP1894857A1 - Underground tank - Google Patents

Abstract

The underground tank (E) has a tank dome (D) formed of plastic, and tank parts and tank dome in an insertion position (M) protruding over the adjacent tank or tank part profile. A receiving hub is selectively provided for a cover, a manhole pit or an intermediate piece. The tank dome is separately made as a release part and is mounted in the insertion position in a round opening that is flushed with the tank periphery in one of several selectable rotating positions relative to the tank and/or the tank parts.

Description

The invention relates to an underground tank according to the preamble of patent claim 1.

Under an underground tank is to be understood in this context, a tank that is usually installed underground and is used above ground only in special circumstances. Such underground tanks are known, for example from the Catalog R 26, Edition 2006 "Rainwater utilization with system "or the Prospectus "GARANTIA" 2006, each of the company Otto Graf GmbH Plastics Products, D 79331 Tening under the serial names DIAMANT, COLUMBUS and CRISTALL. These underground tanks are made, for example, by integrally molded tank dome rotational molding, which projects significantly over the adjacent outline and formed in the pipe fittings at predetermined positions. In the tank dome either directly a cover, or an extending dome shaft with cover, or a dome shaft and an intermediate piece, or the intermediate piece can be used directly either. The integrated dome shaft due to its supernatant relatively large transport dimensions. Pipes to and from the manhole must be adapted to the connection positions. Since the installation position of the underground tank, for example, depends on structural conditions on site and can only be matched in the rarest cases to planned or existing pipelines, the pipes must be laid accordingly, which not only requires elaborate excavation work, but can also lead to flow obstacles. In addition, the tank dome is made of the material of the underground tank, although for the tank dome other material requirements may apply than for the underground tank itself, and the design of the tank dome must be subject to the molding possibilities of the tank tool.

The invention has for its object to provide a ground tank, which has minimal transport dimensions and allows to place the Tankdom leading and running away from this optimal piping.

The stated object is achieved with the features of claim 1.

Since the tank dome is manufactured separately as a loose part, it can be made independently of the ground tank itself from the requirements of the tank dome specifically fairing material and designed accordingly. The transport dimensions of the underground tank are minimized because the supernatant of the tank dome is eliminated. The possibility of using the tank dome in several selectable rotational positions relative to the underground tank allows the pipes to be optimally placed and laid, as the optimum rotational position of the tank dome can be matched to the pipelines regardless of the location of the underground tank.

Although it is with multiple selectable rotational positions of the tank dome, the probability of a good matching rotational position high; however, 360 ° stepless rotation increases the flexibility of the system even more.

A very important aspect of the invention is to stow the manufactured as a loose part and only subsequently mountable tank dome in the opening of the underground tank to achieve a compact transport container, which in the transport position inserted into the opening tank dome provides additional storage space for other equipment , It is advantageous if the tank dome can be inserted so far that it does not protrude appreciably in the transport position on the adjacent outline of the underground tank.

The assembly of the tank dome is particularly easy when the tank dome is snapped with the tank or tank part. There are no additional fasteners and no special tools needed for assembly. By snapping the tank dome and the required tightness is achieved.

Structurally simple opening with a collar and a shoulder is already prepared for convenient assemblage of a tank dome. During assembly, only the snap hooks need to be locked. The desired rotational position of the tank dome is expediently chosen before snapping. As a rule, the at least one inserted seal anyway greased or moistened, it is even possible to turn the snapped tank part in the desired rotational position, or subsequently change a first selected rotational position in order to place the pipes optimally. The snapping is conveniently effected by means of the foot of the tank dome.

It may be expedient to first produce the tank or the tank part with the closed by a disc opening, as this provides manufacturing technology advantages, and only subsequently remove the disc along a desired dividing line. This separation then exposes the collar for snapping the tank dome. This can already be done by the manufacturer.

In an expedient embodiment, the tank dome has a non-circular cross section except for the foot part. In this non-circular cross-section, flats for pipe connections can be prepared. Preferably, at least one Erdverzahnungsvertiefung is provided which prevents subsequent rotation of the tank dome, as the tank dome meshed with the soil.

In terms of manufacturing technology, the foot part has an outer flange on the tank boss wall and an outer ring projecting from the outer flange and approximately coaxial with the tank boss axis. The outer flange is slipped over the opening when the male ring enters the opening. In this way, the tank dome is stably supported on the underground tank.

On the outside of the root region of the Einsteckrings may be provided in the outer flange at least one Dichtungsaufnahmenut. In this Dichtungsaufnahmenut either a sealing frame is inserted or penetrates a sealing ring placed around the opening on the Erdtank. By snapping the required sealing force is generated.

Suitably, the edge of the opening of the tank or tank part is double-walled and ribbed in order to ensure high strength in this area.

In the circumferential course of the Einsteckrings more resilient snap hooks are advantageously provided which hook automatically after insertion of the Einsteckrings behind the shoulder in the underground tank. If necessary, the snap connection can be released by engaging from above through the tank dome again.

In one embodiment, the snap hooks are arranged along the circumferential course of the Einsteckrings in several groups, between which snap hook free areas available. As a result, the Einsteckring over a large part of its circumference is very stable and is generated when snapping a positive and non-positive at many points along the circumference.

A transition between the outer flange and the Tankdomwand should be maximum on the outer diameter of the Einsteckrings so that the tank dome can be inserted as far as possible in the transport position in the opening.

Suitably even a stacking shoulder is prepared on the tank dome with which the tank dome rests in the transport position on the opening edge and is stably supported. For example, this stacking shoulder is simply formed by the bottom of the seal receiving groove.

Thus, the tank dome can be easily plugged into the underground tank, it is expedient if the Tankdomwand is inclined obliquely inwards from the outer flange and ends at an inwardly drawn shoulder which surrounds the receiving seat. This design also leads to high structural strength of the tank dome in the upper area.

In an expedient embodiment, a dome shaft matching the tank dome has a seat for a cover or an intermediate piece. On the outside of an annular flange, preferably formed with bottom reinforcing ribs whose outer diameter corresponds at least to the outer diameter of the Einsteckrings. In transport position, the dome shaft can thus be completely inserted into the tank dome, centered and supported on the insertion ring.

In an expedient embodiment, the underground tank has two identically manufactured tank parts, wherein the disk is removed only from the opening of a tank part and mounted in this opening of the tank dome or inserted for transport. The use of identical tank parts to create the underground tank allows optimal utilization of one and the same tool, eg an injection molding or injection compression tool. With injection molding or injection compression molding, the tank parts can be made of less expensive material in smaller tools than in the case of rotational molding and with a higher output rate. This tool needs to take no account of the shape and design of the tank dome, since the tank dome is made in a separate tool.

According to another important idea, the tank parts are joined separably along a seam by means of externally attached quick connectors. This makes it possible to reduce the transport dimensions even further, since the two tank parts can be transported stacked in each other, wherein the tank dome and other accessories is inserted into the shell cavity. The installation of the underground tank and the tank dome takes place on site.

However, the same tank parts can be used in another embodiment, e.g. Already at the manufacturer, create a monolithic underground tank by welding the tank parts along the seam. In order to transport the monolithic underground tank and to reduce the transport dimensions, an opening is then first of all exposed and the tank dome is inserted into this opening, wherein further equipment components are to be accommodated in the storage space provided by the tank dome.

Finally, it is expedient to form the tank parts and at least the tank dome in one piece as plastic injection molded parts. Special advantage is offered by injection-molded parts, as they can be produced with lower molding pressure.

Fig. 1

eine Perspektivansicht eines Erdtanks in Einbaulage,

Fig. 2

eine Perspektivteilansicht des Erdtanks von Fig. 1,

Fig. 3

den Erdtank von Fig. 1 als Transpörtgebinde in einer Perspektivansicht,

Fig. 4

eine Perspektivteilansicht eines Details,

Fig. 5

einen Schnitt der Schnittebene V-V von Fig. 4,

Fig. 6

im Schnitt, in der Schnittebene V-V von Fig. 5 den Erdtank als Transportgebinde gemäß Fig. 3, und

Fig. 7

im Schnitt, in der Schnittebene V-V von Fig. 4 den Erdtank in der Einbaulage, beispielsweise gemäß Fig. 1.

With reference to the drawings, embodiments of the subject invention will be explained. Show it:

Fig. 1

a perspective view of an underground tank in installation position,

Fig. 2

1 is a perspective partial view of the underground tank of FIG. 1, FIG.

Fig. 3

the underground tank of Fig. 1 as Transpörtgebinde in a perspective view,

Fig. 4

a partial perspective view of a detail,

Fig. 5

a section of the sectional plane VV of Fig. 4,

Fig. 6

in section, in the sectional plane VV of Fig. 5 the earth tank as a transport container of FIG. 3, and

Fig. 7

in section, in the sectional plane VV of FIG. 4, the earth tank in the installed position, for example according to FIG. 1.

An underground tank E in Fig. 1 is suitably made of plastic and is joined in the embodiment shown of two tank parts 1, 2 along a seam 5 with externally applied quick connectors 4. Suitably, the two tank parts 1, 2 in identical design with one and the same tool, for example as injection molded parts or injection-molded parts produced. The Erdtank E is added to the quick connectors 4 only on site, so that the tank parts 1, 2 can be stacked during transport into each other. On the other hand, the underground tank can already be assembled at the manufacturer and transported finished to the installation site. Alternatively, it is indicated that the two tank parts 1, 2 without quick connectors in the seam 5 as indicated by the reference numeral 3 are welded together by welding to a monolithic underground tank, e.g. already at the manufacturer, are joined. Each tank part, but at least the upper part of the tank 1 in FIG. 1, has a Domansatz 6, which is approximately flush with the adjacent contour.

In Fig. 1, the earth tank E is already shown in installation position M, that is, in the Domansatz 6 is a projecting over the outline tank dome D, in which as a. Option a dome shaft A is inserted, which has an upper opening 7. The axis of the tank dome is indicated by X. The tank dome D is expedient a one-piece injection molding or injection-molded part, for example made of PP or PET, in unreinforced, or mineral or glass fiber reinforced setting. If desired, the tank dome D or / and the dome shaft could also be made of metal, e.g. Cast iron exist.

In the installation position M shown in FIG. 1, the underground tank is installed underground in the ground, so that the opening 7 is substantially flush, for example, with the lawn surface or the ground surface. At least one pipeline is laid to or from the tank dome D.

Fig. 2 shows the Erdtank E in the installation position M, wherein a pipe 10 is connected to the tank dome D. As indicated by the double arrow 8, the tank dome D, which is manufactured as a loose part separately from the underground tank or the tank parts 1, 2, in a selectable from several Rotary positions relative to the Erdtank E be mounted so that the respective pipe 10 can be optimally placed in the ground regardless of the position of the underground tank. Suitably, the tank dome D even over 360 ° relative to the Erdtank rotatable.

The tank dome D has a round foot part F with an outer flange 12, which is attached to the Domansatz 6 of the tank part 1. Suitably, the tank dome D is determined by a snap connection. The outer contour of the tank dome can be non-circular and, for example, have at least one flat 9 for a pipe connection. Optionally, a Erdverzahnungsvertiefung 11 is formed, which prevents subsequent rotation of the tank D cathedral thanks to a toothing with the soil. The dome shaft A can also be rotated relative to the tank dome.

FIG. 3 shows the underground tank of FIG. 1 in transport position T and as a compact transport container G. This may be the ground tank formed by means of the quick connectors 4 or by welding, wherein the tank dome D is the other way round as in the installation position in FIGS and 2 is inserted for transport, and possibly also the dome shaft A. The inserted tank dome D and the dome shaft A provide a large storage space S for other equipment parts of the underground tank.

Furthermore, it is indicated that the transport container G in molded foot parts 13 has underside transport feet 15, while the upper foot parts 13 offer eyelets 14 for a hoist. The inserted tank dome D projects with its foot part F only slightly beyond the adjacent outer contour of the underground tank E.

4 shows, for example, a view of the lower tank part 2 (or of the upper, identical tank part 1) before an opening K preformed for mounting and stowing the tank dome is uncovered. The opening K is surrounded by a double-walled opening edge 17 with radial ribs 18 as part of the Domansatzes 6, and closed by a substantially flat disc 16. The disk 16 is connected to the opening edge 17 along a desired cutting line 19. In the event that the tank dome D is to be mounted in this opening, the disc 16 is expediently already removed by the manufacturer. In the other part of the tank remains the disc 16, which formed ribbed for strength reasons can be. Fig. 4 also shows the inserted into the foot parts 13 transport feet 15 and the eyelets 14 for a hoist.

Fig. 5 shows a section in the sectional plane V-V in Fig. 4 that the opening K is closed by the disc 16 with its ribs 20, wherein the disc 16 is connected in the predetermined separation line 19 with a collar 21 of the opening K. At the lower end of the collar 21 an undercut shoulder 22 is formed. The collar 21 is stably supported by the opening edge 17 and the radial ribs 17. The disc 16 forms with the collar 21 and the opening edge 17 the Domansatz 6 of the tank part 1, wherein the disc 16 and the collar 21 is substantially flush with the adjacent outline 23 of the tank part 1.

Fig. 6 shows in section a part of the transport package G of Fig. 3. In the tank part 1, the opening K is exposed. The tank dome D is inserted with the receiving seat 26 ahead in the opening K. If necessary, the dome shaft A is stowed in the tank dome D, whereby further storage space for additional equipment components is present on the inside. The tank dome D is e.g. inserted until it is seated with an externally formed stacking shoulder 32 of the foot part F substantially on the collar 21.

The tank dome D has an inclined from the foot part F inwardly Tankdomwand 24, which extends over an inwardly drawn shoulder 25 to the receiving seat 26. From the Tankdomwand 24, an outer flange 27 extends with a Stülprand 28 to the outside. On the side facing away from the receiving seat 26 of the outer flange 27 a to the axis X of the tank dome D substantially coaxial Einsteckring 29 is formed on the snap hooks 30 are provided. In the outer flange 27, for example, adjacent to the Einziehring 29, a circumferential Dichtungsaufnahmenut 31 formed, the bottom of which forms the stacking shoulder 32.

The dome shaft A has a wall 33 extending to an opening 34 and a seat 35, for example for a cover. The seat 35 is externally surrounded by an annular flange 36 whose outer diameter corresponds at least to the outer diameter of the Einsteckrings 29, and which is supported on the underside by ribs 37. By means of the annular flange 36 and the ribs 37, the dome shaft A is centered and positioned in the transport container G in the inserted tank dome D.

Fig. 7 shows in section the fully assembled mounting position M, for example, of FIG. 1. The tank dome D is inserted with the Einsteckring 29 in the collar 21 until the snap hooks 30 are engaged behind the shoulder 22. The snap hooks 30 are, in this embodiment, arranged along the circumferential extent of the Einsteckringes 29 in groups, so that there are snap hook-free areas 41 therebetween. Each snap hook 30 is resiliently formed in the insertion collar 29. In the Dichtungsaufnahmenut a seal 40 is inserted, which rests on the collar 21 and ensures tightness. The Stülprand of the outer flange engages over the opening edge of the opening K away.

The dome shaft A is inserted into the receiving seat 26 from above, with a seal 39 ensures the tightness and holding the dome shaft A. The annular flange 36 projects outwardly beyond the tank dome D. In the flat 9 a pipe connection 38 is cut out, which is aligned by the selected rotational position of the tank dome D relative to the tank part 1 exactly, for example, the stretched, optimally short pipe 10 of FIG. The pipeline 10 can be laid as straight as possible and independently of the position of the underground tank to Tankdom D because its rotational position can be adjusted to the pipe 10.

The concept of making the tank dome D as a loose part and tailored to the specific requirements of a tank dome in terms of material and design is also useful for other underground tanks, such as ground tanks monolithically molded by rotational molding in which the opening for mounting and / or stowing the tank dome either already cut out or subsequently cut out. The opening K could be sunk in relation to the adjacent outline of the ground tank, in order to avoid any projection in the transport dimensions of the underground tank. But also a slightly excessive placement of the opening in relation to the adjacent outline is conceivable. As a further alternative, the snap hooks could be locked on the outside of the Domansatz, and could, if necessary, the ultimately selected rotational position of the tank dome be fixed by a fastener. Further, the tank dome D could also be higher or lower in relation to the dimensions of the underground tank than shown. For example, if the underground tank is equipped with one or more partitions for wastewater treatment or the like, several tank domes could be adapted to those described above Be mounted way. The tank dome is expediently sized so that it fulfills the function of a manhole. For example, could be molded or mounted inside the tank dome treads or fasteners for a ladder. An underground tank E could optionally be configured with one of a plurality of, for example, differently high or differently formed tank domes, for example in adaptation to the installation conditions or the respective intended use.

Claims (20)

Earth tank (E) with at least one tank dome (D), made of plastic, wherein the underground tank is integrally or from tank parts (1, 2) joined and the tank dome (D) in installation position (M) on the adjacent tank or tank part outline ( 23) and a receiving seat (26) optionally for a cover, a manhole (A) or an intermediate piece, characterized in that the tank dome (D) a separately manufactured loose part and in installation position (M) in a substantially with the tank outline (23) flush round opening (K) is mounted in one of a plurality of selectable rotational positions relative to the tank or tank part. Earth tank according to claim 1, characterized in that the tank dome (D) about the Tankdomachse (X) is continuously rotatable relative to the tank or tank part, preferably by 360 ° rotatable. Earth tank according to claim 1, characterized in that the tank dome (D) for mounting a foot part (F) whose diameter is greater than the diameter of the receiving seat (26), and that, the tank dome (D) in transport position (T) with the receiving seat (26) in front substantially to the foot part (F) in the opening (K) can be inserted and forms an accessible through the foot part (F) transport storage space (S). Earth tank according to claim 1, characterized in that in the installation position (M) of the tank dome (D) in the opening (K) is snapped with the tank or tank part, preferably by means of the foot part (F). Earth tank according to claim 4, characterized in that the opening (K) on a collar (21) has an inner, undercut shoulder (22) for snap hooks (30) of the tank dome (D). Earth tank according to claim 1, characterized in that the tank or tank part is produced with the opening (K) closed by a, preferably ribbed, flat disc (16), preferably in a substantially flush with the adjacent outline (23) Domansatz (6), and that the disc (16) is removably connected to the collar (21) along a circular desired separation line (19). Earth tank according to claim 1, characterized in that the tank dome (D) except for the foot part (F) has a non-circular cross-section with at least one flat part (9) for at least one pipe connection (39), and preferably at least one Erdverzahnungsvertiefung (11) , Earth tank according to claim 4, characterized in that the foot part (F) on the Tankdomwand (24) has an outer flange (12) and from the outer flange (12) projecting, approximately to Tankdomachse (X) coaxial Einsteckring (29) with the inner diameter of Opening (K). Earth tank according to claim 8, characterized in that on the outer side of the root portion of the Einsteckrings (29) in the outer flange (12) at least one Dichtungsaufnahmenut (31) is provided. Earth tank according to claim 1, characterized in that the edge (17) of the opening (K) of the tank or tank part is double-walled and ribbed. Earth tank according to claim 8, characterized in that in the circumferential course of the Einsteckrings (29) a plurality of resilient snap hooks (30) are provided, and that the snap hooks (30) behind the shoulder (22) are hooked. Earth tank according to claim 11, characterized in that the snap hooks (30) form a plurality of groups along the circumference, and that between the groups snap hook-free areas (41) of the Einsteckrings (29) are present. Earth tank according to claim 8, characterized in that a transition between the outer flange (12) and the Tankdomwand (24) maximum on the outer diameter of the Einsteckrings (29) or the inner diameter of the opening (K) of the tank or tank part. Earth tank according to claim 9, characterized in that the tank dome (D) has an outer stacking shoulder (32), which, preferably, from the bottom of the Dichtungsaufnahmenut (31) is formed. Earth tank according to at least one of the preceding claims, characterized in that the Tankdomwand (24) from the outer flange (12) is inclined inwardly inclined and ends at an inwardly drawn shoulder (25) which surrounds the receiving seat (26). Earth tank according to claim 1, characterized in that a tank dome (D) matching dome shaft (A) has a seat (35) for a cover or an intermediate piece, and that on the seat (35) outside an annular flange (31), preferably with underside stiffening ribs (37) is formed, the outer diameter of which corresponds at least to the outer diameter of the Einsteckrings (29). Earth tank according to at least one of the preceding claims, characterized in that the Erdtank (E) has two identical tank parts (1, 2), and that the disc (16) from the opening (K) only one tank part (1) and taken in this Opening (K) of the tank dome (B) is mounted or plugged in for transport. Earth tank according to claim 17, characterized in that the tank parts (1, 2) are joined by means of externally mounted quick connector (4) divisible along a seam. Earth tank according to claim 17, characterized in that the tank parts (1, 2) along a seam (5) by welding (3) to a monolithic Erdtank (E) are joined, and that the monolithic Erdtank with at least that in an exposed opening ( K) in the transport position (T) stowed tank dome (D), possibly also with a stowed in the tank dome manhole (A) and / or a lid, a transport container (G) forms. Earth tank according to at least one of the preceding claims, characterized in that the tank parts (1, 2) and at least the tank dome (D) are integral plastic injection molded parts, preferably injection-molded parts.

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