WO2008135028A1

WO2008135028A1 - Submersible pump

Info

Publication number: WO2008135028A1
Application number: PCT/DE2008/000747
Authority: WO
Inventors: Wolfram Entzeroth; Volker Fertig
Original assignee: Lutz Pumpen Gmbh
Priority date: 2007-05-05
Filing date: 2008-05-05
Publication date: 2008-11-13
Also published as: DE102007021174A1; EP2153069A1

Abstract

As is known, containers are equipped with removable pump systems, wherein the pump system remains in the container. The pump system must be sufficient for a complete pump-out from the container opening to the container bottom. Due to the flexibility of the containers, deformations occur during filling and emptying, so that the installed pump system can no longer reach the bottom when emptying the container, or can be jolted during filling and thus damaged. The invention solves said problem with an adjustable-height mounting suspension of the pump system (20), such as by means of a gaiter (11) allowing the pump system (20) to give way if needed. By using existing container openings and adaptations thereto, in addition further containers openings can also be foregone.

Description

B E H E L T E R P U M P E

The invention relates to a container pump comprising at least one pumping station and a closure head, wherein the pumping device is introduced into a container via a container opening and is received in the container opening in a sealing but detachable manner in the container opening by means of the closure head, as well as by means of a connection flange accessible from the outside The pumping unit is intended to be separable operatively connected pump motor.

Such a container pump is already known from DE 10 2004 046 224 Al. A sealing device relating to a container with a corresponding pump is also known from the 10 2004 046 266 Al.

In the context of these German patent applications, it is proposed to introduce into a container through a bunghole provided for this purpose a pumping station, with which the container can be filled or emptied. Advantageously, in this case, the pumping station can remain in the container when the pump motor is removed, as a result of which opening of the container can be omitted, for example in the case of critical fluids. According to the invention, the bunghole, through which the pumping station is introduced into the container, pulled so deep that a stacking of the container despite the pumping station contained therein is still possible. If necessary, therefore, the completely filled container is delivered with a pumping station and only a pump motor with a removal device is flanged if necessary. Despite the advantages mentioned, this solution still poses a problem with regard to the pumping device introduced into the container; usually the containers are plastic containers which are accommodated in a lattice cage. However, the containers themselves are flexible, whereby upon filling of the container due to the weight of the filled liquid, the container changes its shape in that it increases in width, but at the same time loses height due to the constant amount of material. However, a pumping station introduced into the container should reach as far as the bottom of the container during filling or, in particular, during emptying, and in particular in the final phase of emptying, so that a residue-free emptying is ensured as far as possible.

Accordingly, there is the dilemma that either the pumping station in the quasi-empty state of the container extends to the container bottom, but can be compressed due to the container deformation in the filled state and thereby damaged, or a compression by the choice of a too short in principle

Pumping can be avoided, which, however, brings problems with the complete emptying of the container.

Against this background, the present invention, the object of the invention to provide a container pump which allows at the same time avoidance of damage to the pumping station a complete emptying of the container. Furthermore, the invention is based on the object, without sacrificing the benefits of the deep-drawn bung hole to dispense with the specially provided for the introduction of the pumping bunghole.

These objects are achieved by a container pump according to the features of the main claim. Further useful expressions Configurations of the container pump can be found in the dependent claims. In addition, a meaningful use of the container pump can be taken from the sidelined use claim 18.

According to the invention, a compression of the pumping station is thereby avoided or a complete emptying of the container is ensured by the fact that the pumping station is received in a height-displaceable manner in the container opening, so that it is possible to avoid the pumping station in the event of an imminent compression. Conversely, a lowering of the pumping station with respect to the upper edge of the container will be possible if the container is emptied and consequently straightens. Specifically, while the pumping plant is connected to a closure head, which is sealingly inserted into the container opening through which the pumping station is inserted into the container. With particular advantage, the container opening used is an already existing filling opening, which would otherwise be closed off with a conventional container lid. The closure head to be used in this case represents a substitute for this container lid, which, however, has been prepared in accordance with its intended purpose for use with said pumping station.

Due to the use of a closure head, which so far represents a replacement for conventional container lid, it is particularly useful if the closure head has the usual for the known container lid outer thread contour for screwing to the container opening. In addition, it is particularly useful if in addition to this outer thread contour ultimately for connecting the closure head with pumping a second, internal thread contour is present, which preferably also designed as an internal thread and which is intended connectable to the pumping station.

Between this thus formed inner and outer thread contour means are provided with particular advantage, which allow a höhenverschiebliche mounting of the inner relative to the outer thread contour. As such, it is about to provide a bellows, which is made of annular, preferably elastic, material bulges and subsidence, about to form a rolling membrane. If necessary, a bellows made in this way will allow the pumping station to be displaced downwards or upwards, assuming a storage of the container as intended, whereby the bulges or depressions of the material will be tightened or relaxed in the vertical direction while granting the corresponding degree of freedom. In accordance with an advantageous development of the flexibility of the bellows also allows a movement of the pumping station in the radial direction, so that at least in some barriers an alignment of the pumping station even after insertion, such as targeted recording of liquid residues, is still possible.

Such a bellows can be produced in particular by using a material produced from two components, wherein the bellows is in particular an elastomer, while the thread contours are made of plastic, such as hard plastic. Due to the use of this two-component technique, the closure head can simultaneously provide the required elasticity with respect to the height-adjustable mounting of the pumping station and ensure a stable connection to the container or to the pumping station. An alternative to the use of a bellows is to use a telescopic arrangement of a plurality of concentric, slidingly mounted sleeves, of which ideally the outermost is connected to the closure head, the innermost to the pumping station. By a need-based displacement of the sleeves into each other, the same effect is achieved in principle as the bellows, with a radial deflection of the pumping station, however, this is more limited.

Advantageously, the container has a bilge, which represents the geodetically lowest point in the container. In this case, in the case of an almost complete emptying of the container, the liquid remaining therein will converge, so that it would appear to make sense in particular to set the pumping station at this point. After an arrangement of the pumping station takes place through the container opening and a deflection of the pumping station is to take place mainly in the axial and possibly slightly in the radial direction, it seems particularly meaningful to provide the bilges at least approximately vertically below the container opening - or vice versa. Complete emptying of the container is thus additionally simplified.

In an advantageous embodiment, a support tube is provided in the area between the container opening and bilge, in which the pumping station is introduced. In this support tube, the pumping station, at least partially, height-adjustable added, where it can slide along the support tube. As far as the pumping station does not extend to the container bottom, the support tube acts in principle like an extension in the sense of a pump lance, so that via the support tube, a suction of the liquid can take place in the container. Since, due to the use of fertilg a support tube also a compression of the same in the case of deformation of the container can take place, it is particularly useful to provide the support tube only partially, for example, only in the region of the container bottom.

Since, for example, an orientation of the pumping station in the container in the upper area can be quite difficult when using a bellows, a guide element is assigned to the closure head below the inner thread contour, which guides the pump lance in the right direction when it is inserted into the container. For this purpose, the guide element on a guide sleeve, which surrounds the pumping station, in particular the pump lance, such that a guide is possible. The guide sleeve is arranged at a distance from the inner thread contour, so that the use of the pumping station is ensured in each insertion height made possible by the closure head.

In particular, it makes sense if, in order to maintain the stackability, the pumping station does not protrude beyond the container top edge. In particular, it is helpful if the closure head does not exceed the dimensions of the conventionally used container lid in its dimensions. For this purpose, it is already sufficient that the pumping station in the closure head itself is so deep drawn that an overhanging of the container wall is avoided. In this way, a deep drawing of the container opening can be omitted and already existing container openings can be used.

After the usually single container opening is now used for filling or emptying of the container, the question arises about the ventilation of the container during the removal or the introduction of liquid. In In this context, it makes sense if a ventilation and / or ventilation is present, which may be provided in particular in the closure head. In order to maintain the required tightness of the container nevertheless, it is particularly useful to realize such a loading and / or venting with sintered filter mats, so that any openings for the ventilation on the one hand are sealed liquid-tight, on the other hand, an air passage yet is guaranteed. For this purpose, it is possible to adjust the porosity of the filter materials used and thus to regulate the degree of air flow.

In order to regulate the ventilation, the stages provided in the closure head can be assigned different levels of seals, also in conjunction with each other. For this purpose, in particular, a sintered filter mat, a labyrinth closure and a seal are provided, the latter having small openings, which in particular can pass through air, but not of liquids received in the container.

Alternatively, however, conventional types of valves, such as a slot diaphragm, a ball valve or a manually operated valve device can be used.

In a concrete embodiment, it also makes sense to assign a seal to the pumping station in such a way that even with the pump motor flanged off, the container with the pumping station received therein constitutes a sealingly sealed unit. This can be ensured by the fact that the delivery line of the pumping station is also closed by a valve which closes the delivery line in the event of a pump standstill. In addition to the conventional use of the container pump described above as such, it is also possible to connect the pumping station accommodated in the container, a suction pump, which serves the pumping station only as a pump lance. In this way it is possible to use other pumps with the proposed system and thus gain greater flexibility.

The invention described above will be explained in more detail below with reference to an embodiment.

Show it

1 shows a closure head of a container pump in a lateral sectional view,

FIG. 2 shows the closure head according to FIG. 1 with a height-displaceably connected pumping station in a lateral sectional representation,

3 shows the closure head with pumping unit according to Figure 2 with flanged pump motor in a side sectional view and

Figure 4 shows another embodiment of the closure head in a side sectional view.

Figure 1 shows a closure head 10, which is used in the invention as a replacement for a conventional container lid. In this case, the closure head 10 serves to hold a pumping station 20, which is to be secured in the Close container can be inserted. The closure head 10 is associated with a conventional container such that the closure head 10 is screwed with an outer thread contour 13 onto a container opening. A sealing ring 14 is received in the outer thread contour 13 such that when screwing the closure head 10 with the container opening a sealing connection is made. Where usually the cover surface is located in a container lid, the closure head 10 instead has a deep-drawn, internal thread contour 12 into which the pumping station 20 to be connected via the closure head 10 to the container can be screwed. The pumping station 20 can be accommodated in the container in this way, whereby a unit of pumping station 20 and container is produced. This unit can usually be provided as a whole by a supplier, so that the customer of the container only has to flanged a pump motor 30 onto the pumping station 20 in order to remove a liquid present in the container approximately. When removing the liquid stored in the container, because of the weight of the liquid, deformations of the container occur, which would normally cause the pumping station 20 not to reach the bottom of the container, because the container rises with increasing emptying under the yielding pressure , A complete emptying of the container would then no longer possible. In the present case, this is remedied by the fact that the inner thread contour 12 is mounted so as to be vertically displaceable relative to the outer thread contour 13 by means of a bellows 11. As a result, the pumping station 20 can be displaced as required in the direction of the container bottom to a container which rises in the course of its emptying. A complete emptying of the container is thus possible, but without the pumping station 20 during filling and the associated reverse container deformation of a To suspend compression and thus to take the risk of damaging the pumping station 20 in purchasing.

FIG. 2 shows the closure head 10 according to FIG. 1 with an attached pumping station 20, which is screwed into the inner thread contour 12 of the closure head 10. It can be determined that the pumping station 20 has a centering dome 25 and a pumping station flange 24, via which a connection with the pump motor 30 can be entered. About the centering dome 25, a drive of the rotor shaft 21 is possible through which the pumping action of the container pump is effected. When the pump is running, the medium to be pumped is conveyed via the pump mandrel 22 in the direction of the pumping station flange 24, which, however, is closed with a flanged motor via an inner closure valve 23, so that the container with the closure head 10 and the pumping station 20 used a sealed, sealed unit represents.

Figure 3 shows again the closure head 10 with inserted pumping station 20, which is also associated with a pump motor 30. In particular, it can be stated that the pumping station flange

24 now in a, the pump motor 30 associated discharge nozzle 31 opens, including the inner closure valve 23 is disengaged and the medium to be delivered can be removed via the sampling port 31. The removal nozzle 31 in turn has an outer closure valve 32, so that without here in turn flanged removal line opening of the delivery channel can not occur. To secure or secure the pump motor 30 to the pumping station 20, the motor base 33 of the pump motor 30 engages in the centering dome

25 of the pumping station 20, so as to ensure a secure connection between pump motor 30 and pumping station 20. The overall arrangement with the container is still only directly connected via the bellows 11, so that pumping station 20 and pump motor 30 are mounted vertically displaceable with respect to the container opening.

FIG. 4 shows a closure head 10 in a further embodiment with a modified ventilation, in which the ventilation openings in the closure head 10 are provided in the upper edge area. For this purpose, a plurality of stages of closure and filter elements are assigned to the ventilation openings, wherein a passage of the incoming and outgoing air is ensured, while the liquid accommodated in the container is prevented from exiting through the said closure stages.

Below the ventilation openings, a sintered filter mat 16 follows, which is followed by a labyrinth closure 17. Below this, a perforated seal is provided, the openings of which can be penetrated by air, through which, however, no liquid can escape.

Also complementary to the closure head 10 is associated with a guide element 19.1, which carries a spaced from the inner thread contour 12 guide sleeve 19.2. Due to the spacing, the guide sleeve 19.2 can be used in any altitude of the bellows 11 and does not hinder these in their Höhenverschieblichkeit. The guide sleeve 19.2 serves to align the pumping station 20 in the container, so that it can be placed vertically, although the closure head in the area about the bellows 11 holds no guide. Thus, a container pump is described above, which ensures, due to its height-adjustable mounting with respect to the upper edge of the container, that the container can be completely emptied despite possibly occurring deformations and about concomitant changes in height of the container, without the risk of compression and thus damage to the pump to have to accept. It is also ensured by the choice of an ally for the conventional container lid as a closure head that can be dispensed with additional, possibly specialized, container openings.

E N G L I S H E S T E

10 closure head

11 bellows

12 internal thread contour

13 outer thread contour

14 sealing ring

15 deep-drawn inner flanks

16 filter mat

17 labyrinth closure

18 Perforated seal

19.1 Guide element

19.2 Guide sleeve

20 pumping station

21 rotor shaft

22 pump dome

23 inner closure valve

24 pumping station flange

25 centering dome

30 pump motor

31 sampling nozzle

32 outer closure valve

33 engine foot

Claims

PATENT APPLICATIONS

1. container pump comprising at least one pumping station (20) and a closure head (10), wherein the pumping station (20) introduced via a container opening in a container and on the drive side by means of the closure head (10) sealingly but releasably received in the container opening, and a pump motor (30) operatively connected separably to the pumping unit (20) by means of at least one connecting flange (24,25), characterized in that the pumping station (20), while maintaining at least one degree of freedom, namely height-displaceable, with the closure head (10) is connected.

2. Container pump according to claim 1, characterized in that the closure head (10), preferably designed as an internal thread outer thread contour (13) for screwing to the container and an at least approximately concentric, also preferably designed as an internal thread, inner thread contour (12 ) for screwing to the pumping station (20).

3. Container pump according to claim 2, characterized in that the inner and outer thread contour (12, 13) are connected in a height-displaceable manner via a bellows (11) arranged concentrically between the inner and the outer thread contour (12, 13), wherein the bellows ( 11) is made of annular, preferably elastic, material bulges and depressions, such as to form a rolling diaphragm.

4. Container pump according to claim 3, characterized in that due to the bellows (11) both an axial, as well as a radial movement of the pumping station (20) is made possible.

5. Container pump according to one of claims 2 to 4, characterized in that the closure head (10) is made in two-component technology, wherein the bellows (11) made of an elastomeric material and the thread contours are made of a plastic material.

6. Container pump according to claim 2, characterized in that the inner and outer threaded structure (12,13) are arranged vertically displaceable over a concentrically arranged between the inner and the outer threaded contours (12,13) telescopic arrangement, the telescopic arrangement of concentric made in each other longitudinally displaceable sleeve sections.

7. A container pump according to one of the preceding claims, characterized in that the container has a bilge, which covers the geodetically lowest point of the container bottom when the container is installed according to the instructions, the bilge arranged at least approximately vertically below the container opening at the intended installation of the container is.

8. A container pump according to claim 7, characterized in that between the container opening and bilge, at least in sections, a support tube is provided, in which the pumping station (20) is guided and / or which as an extension of the pumping station (20) in the sense of a pump lance serves.

9. Container pump according to one of the preceding claims, characterized in that the closure head (10) is assigned a guide element (19.1) which, preferably spaced from the inner thread contour (12), for receiving the pumping station (20) in a Guide element (19.1) connected to the guide sleeve (19.2) is provided.

10. Container pump according to one of the preceding claims, characterized in that the container opening is deep-drawn with respect to the upper container wall.

11. Container pump according to one of claims 2 to 10, characterized in that the inner thread contour (12) with connected pumping station (20) does not project beyond the upper container wall.

12. Container pump according to one of the preceding claims, characterized in that the outer thread contour of the closure head corresponds to the thread contours and dimensions of conventional container lid.

13. Container pump according to one of the preceding claims, characterized in that the closure head (10) can be ventilated and / or vented.

14. A container pump according to claim 13, characterized in that for loading and / or venting air openings are provided, which are closed with sintered filter materials sen.

15. Container pump according to claim 14, characterized in that the porosity of the filter materials is adjustable.

16. Container pump according to one of claims 14 or 15, characterized in that the air openings are closed by a sintered filter mat (16).

17. Container pump according to one of claims 13 to 16, characterized in that the air openings a Laby- rinthverschluss (17) is assigned.

18. Container pump according to one of claims 13 to 17, characterized in that the air openings is associated with a perforated seal (18).

19. Container pump according to claim 13, characterized in that the loading and / or venting is designed as a slot diaphragm, ball valve or manually operated valve device.

20. Container pump according to one of the preceding claims, characterized in that the pumping station an inner

Closing valve (23), in such a way that when flanged pump motor (30) of the container with the pumping station (20) received therein remains sealed remains.

21. Container pump according to one of claims 2 to 20, characterized in that the internal threads (12,13) of the closure head (10) are formed like saw threads.

22. Use of the container pump according to one of the preceding claims, wherein the inserted into the container Pumping station (20) is used as a pump lance of a suction pump.