DE102004046224B4 - Container system with a pumping station of a container pump integrated in a container - Google Patents

Abstract

container system with one in a container (1) integrated pumping station (11) of a container pump, in particular one Drum or container pump, the one through a bunghole (5) in the container (1) insertable Pump lance (12) through which one with a drive motor (31) in operative connection rotor shaft (13) with a on this rotatably received pump rotor (15) extends therethrough, wherein the pump rotor (15) on the drive side of the rotor shaft (13) far end, therefore, when properly arranged in the ground area, of the container (1) and a pump head separable from the pumping station (11) (25) with integrated drive motor (31), characterized that the pumping head (25) separated pumping station (11) in such Bunghole (5) of the container (1) introduced is that the container (1) with the introduced pumping station (11) forms a sealingly sealed unit and the pump head (25) a connection flange (30) for non-positive and positive connection the pump head (25) to the pumping station (11), wherein a sampling nozzle (33) to connect ...

Description

The invention relates to a container system with a pumping station, which is integrated in a container, of a container pump, in particular a drum pump or container pump, which is inserted through a bunghole into the container (FIG. 1 ) einführbare pump lance through which extends a standing with a drive motor operatively connected rotor shaft with a rotatably received on this pump rotor, wherein the pump rotor is disposed at the end remote from the drive side of the rotor shaft, thus at the intended location in the bottom region of the container, and a separable from the pump pump head with integrated drive motor.

Such a container system is from the DE 43 35 242 A1 previously known.

Furthermore, a container pump of the type described in the US 2,385,105 previously known. It is a container pump which can be connected by screwing with a container. In this case, a structure in four different levels is clear, which are also bolted together sealingly. Due to the toothing of the individual levels, it becomes clear that a separation of the pump head from the pumping station is at most necessary for repair purposes.

Another container pump describes the DE 85 15 779 U1 , Subject of this utility model is a connection piece for a pump, in particular a barrel pump, which is connected as a whole tightly connected to a container. The connection is realized in the form of a bayonet closure, which is easy to open, so that the pump together with its pumping station can be easily separated from the container.

Furthermore, according to DE 43 35 242 A1 discloses a container pump or barrel pump having a dip tube for insertion through a bunghole into a container. Through the dip tube extending with a drive motor operatively connected rotor shaft extends through which is rotatably connected to the drive motor.

It is also known, such container pumps for emptying Reusable transport containers, in particular to use so-called "IPC containers" Containers are usually made one made of plastic, in particular polypropylene Receiving vessel.

These Receiving vessels usually have a rectangular one or square cross section. To increase the transportability and stiffening of the plastic walls, but also for seizures the stackability The mentioned containers are the plastic containers in question usually taken from a wire mesh, the plastic containers supportive embraces.

Such containers can now according to the DE 41 41 774 A1 be emptied by means of a pressure or suction conveyor. Alternatively, the containers can also be emptied by means of the aforementioned container pumps. In this case, a pump lance is usually introduced through the bunghole of the container in the container and conveyed by the at the end remote from the drive motor pump lance pump rotor received in the container and to be conveyed liquid through a concentrically arranged in the pump lance conveyor channel and a sampling port in passed a connected to this sampling pipe hose, over which the liquid can be removed from the mentioned container.

In particular, in the context of the introduction of the so-called "SCR technology", especially in large freight forwarders, the need has arisen to provide reducing agents, preferably agents, which are transported into the mentioned IPC container in the area of forwarder-owned filling stations or else at free filling stations The SCR technique (Selective Catalytic Reduction) describes a technique for reducing nitrogen oxide (NO _x ) emissions in the exhaust gas through the use of a reducing agent and catalytic converters, which allow consumption-optimized engine operation, in particular of diesel engines, using the reducing agent, preferably urea , catalytically or thermally converted to ammonia and then used in combination with suitable catalysts to convert nitrogen oxides to harmless nitrogen and water. [0003] According to the current state of the art, the SCR technique is considered to be the most advanced method of nitrogen oxide reduction For this reason, NO _x conversion rates of 75 to 85% can be achieved with this SCR technique. In addition, the HC and PM values of the exhaust gases, which are also harmful to the environment, are drastically reduced. It is certain that the legislator will prescribe the introduction of SCR technology, at least for commercial vehicles.

It will therefore be in the future be required that for use of the above Catalyst technology, the commercial vehicles in question in addition to the fuel also the mentioned ones Reducing agent, so carry urea, in particular. The Commercial vehicles need future So also be refueled with urea.

This technique is also referred to as the "Adblue technique." As described above, for the nationwide introduction of this Technology also needed to build an Adblue infrastructure.

there It can be assumed that the reducing agents in the mentioned IPC tanks to be delivered to freight forwarders and filling stations. Already during transport, as well as when refueling the trucks with the reducing agent, is there a complete Sealing the containers and in this container absorbed liquids because the uric acid absorbed in these containers is below atmospheric Conditions crystallized.

The so far provided solution that the container already provided with a suction lance at the factory and then at Forwarder by connecting a suction hose with a suction pump is emptied already contains the extent to be demanded tightness problems. Furthermore is the lifetime of the so-called suction pumps compared to the Drum pumps described above comparatively low, since the self-priming pump necessary at least at the time of switching on, but also runs dry with appropriate emptying of the container, wherein These phases of dry running increased pump wear and thus a lower life expectancy for mean these pumps.

The possible immediate alternative to the use of the barrel pumps described above in the area of the containers in question, for example their solid Installation or their solid connection with the containers, although provides a superior and viable alternative to the above-described emptying of the container with a suction lance. However, the use of this technique has the disadvantage that the extraction nozzle described above is necessary outside the bunghole must be arranged. This also applies to the usual arranged above the sampling nozzle drive motor. The order of the outlet nozzle and the drive motor above the bunghole is synonymous with the loss of stackability for transporting the reducing agent provided container.

outgoing From this prior art, the invention is therefore the task underlying, a container system to create, on the one hand, the requirements for permanent sealing the liquid absorbed in the container and on the other hand the stackability of the container at least largely preserved and also with a more powerful one Emptying device can be equipped.

The solution This object is achieved with a container system according to the main claim. Advantageous embodiments can taken from the dependent claims become.

According to the main claim lies the core idea of the container system according to the invention therein, a container pump to use with a pump head and a pumping station that are different from each other are separable. The separability of the adapted as a pump head drive unit From the pumping station as such is already realized in the prior art. The peculiarity of the solution according to the invention lies in the fact that in contrast to the prior art, the pump head in a connection flange for connection of the Pumping head to the pumping station and the sampling nozzle for connection a pressure hose is assigned for emptying the container. Thereby Is it possible, Build up the pumping station so that only the one to connect the pump head needed Connecting piece projects beyond the bunghole of the container. This makes it possible again, the described container at correspondingly deeper drawn bunghole with already integrated Pumping, including the connecting piece of the pumping station for the Pump head remains below the upper edge of the container and thus It is ensured that the stackability of the pumping station provided container not impaired is.

In Advantageous embodiment forms the recorded in the container Pumping station with the tank a sealed system. This is especially under the aspect necessary and meaningful that preferably in the container absorbed liquids under the influence of atmospheric Pressure or other environmental influences can. In the present case, it was pointed out in particular that the in the container urea to be transported under the influence of atmospheric Pressure crystallized.

Of the Pump head is usually over a Connecting flange or by means of a bayonet with the Connection piece of the pumping station coupled, in which case the drive motor in operative connection with the rotor shaft and, moreover, a sealingly sealed flow connection between the sampling nozzle and in the pump lance of the pumping station concentrically arranged conveyor channel will be produced.

In another advantageous embodiment, in contrast to the prior art, the sampling nozzle is not in an at least substantially right angle to the longitudinal axis of the pump lance, but rather obliquely arranged diagonally, so that with an unchanged length of the sampling nozzle, the space required for the sampling nozzle in the radial from the imaginary longitudinal axis of the pump lance forterstreckenden direction is lower. This oblique arrangement of the sampling nozzle has the advantage that the sampling nozzle is more or less completely arranged in the recess of the bunghole, so that a possible pressure hose connection, which can be easily assembled with the sampling rod for a simple and on the other hand, the aforementioned hose connection not in In the immediate vicinity of the sampling nozzle must be bent, for example because the dimensions of the recess of the bunghole require it. Such a kink would on the one hand reduce the durability of the sampling hose and on the other hand, if necessary, impair the delivery rate of the container pump.

In Advantageous embodiment is the bunghole over the Upper edge of the container wall in such a way pulled deeper, that the connecting piece of the pumping station respectively below the upper edge of the container container remains. The lowering of the bunghole thus supports in an advantageous embodiment, the endeavor of the solution according to the invention, the stackability of the container preferably little, best not to affect.

often are the IPC containers Also double-walled, so that in an alternative embodiment also pulled up the respective outer container wall can be, leaving the top edge of the container quasi higher and that in the inner tank wall let in bunghole with the integrated pumping station surmounted

In both cases the bunghole is pulled so deeply that the withdrawal nozzle, which is arranged in the connection flange of the pump head so that also not overtopped by this, the upper edge of the container to be emptied becomes.

In This is also possible, for example the drive motor being separable from the connecting piece, in the event of a malfunction To be able to change the drive motor as such without problems. There the sampling nozzle is located below the container top, the container can be delivered with already mounted connection flange without As a result, the stackability of the container is impaired.

The above-described container pump is ideally operated with a conventional universal motor.

In again advantageous embodiment is the coupling of the connection flange designed so that when connecting the flange and so that the pump head to the pumping station automatically the conclusion of the pumping station and the tank formed closed system provided seal is opened automatically and thereby the flow channel is opened in the direction of the sampling nozzle.

In advantageous embodiment may be at the sampling neck on conventional Fuel nozzle to be connected.

In again advantageous embodiment are in the hose connection a flow meter is connected between the fuel nozzle and the nozzle.

Of the Extraction nozzle is additional with a return valve provided to prevent that after the end of the tapping process about contaminated liquid in the container flowing back.

The closed system container with integrated pumping plant is sealed in an advantageous embodiment delivered as a level control and guarantee.

It demonstrate:

1 a container with a recorded in a bunghole of the container pumping station in a sectional view;

2 a top view of the in 1 illustrated container;

3 a pump head in a sectional view and

4 a complete view of the container system with a fully installed in the container container pump in a sectional view.

1 shows a container, in particular an IPC container as it is commonly used for the transport of chemical, pharmaceutical or other liquids used in the industrial sector. Such containers have a capacity of about 1000 liters. The usually made of plastic container wall 2 is to increase the stability of a steel pipe linkage 3 edged. The Vontainerwandungen can certainly be designed double-walled.

The IPC container according to 1 In addition to the otherwise provided for filling, emptying and washing openings 4 an additional special bunghole 5 on that in a well 6 the upper container wall 7 is arranged. The depression 6 gets into the upper container wall 7 by deep drawing, their design for reasons of stability as well as manufacturing and technical tools with regard to the maximum diameter to be respected and the maximum possible depth of the well 6 tight limits are introduced.

This will anyway ensure that the bunghole 5 whose outer diameter is formed by an eversion 10 is limited, compared to the other upper container wall 7 is lowered. Alternatively, the eversion 10 also inside so inside the container 1 to be turned.

For both versions, that's true in the bunghole 5 recorded pumping station 11 which essentially consists of a pump lance 12 with one in this pump lance 12 absorbed rotor shaft 13 and a rotor shaft 13 concentrically enclosing conveyor channel 14 does not exist, with the connection neck 16 the pumping station 11 over the upper container wall 7 of the container 1 survives. Through the delivery channel 14 should be one in the container 1 absorbed liquid, in the case of the here primarily treated SCR technique, preferably urea, by means of the rotor shaft 13 driven pump rotor 15 from the container 2 in the direction of the bunghole 5 be expelled.

The pumping station 11 towers over the deepened bunghole 5 around the connection pipe 16 However, its upper edge clearly below the upper container end 20 and below a possibly intended for transport closure 21 the bunghole 5 is arranged. The bunghole 5 is by means of a corresponding O-ring or sealing body 22 hermetically sealed against the outside environment.

In the 1 shown unit of a container 1 with a pumping station accommodated in this container 11 thus represents a self-contained, completely sealed to the atmosphere unit, which readily with the in the container 1 absorbed liquid stackable, thus transportable.

As shown in 3 consists of the pumping station 11 detachable pump head 25 essentially from the connection flange 30 and in the pump head 11 recorded drive unit 31 , The sampling nozzle 33 is as shown in 3 for connecting a pressure hose with a union nut 32 Mistake.

In an improved embodiment of the sampling neck 33 However, executed with a return stop, so as provided with a return valve, which opens automatically during pumping operation and when uncoupling the pump head 25 automatically closes, thus preventing the return of any liquid still present in the connected hose line. In this case, can on the union nut 32 be dispensed with, since the extraction nozzle 33 is designed as a conventional hose connector for connecting a pressure hose.

When the pump head is connected as intended 25 to the in 1 illustrated pumping station 11 becomes the drive motor 31 frictionally engaged with the rotor shaft 13 of the pumping station 11 coupled and the sampling neck 33 in fluid communication with that in the pump lance 12 arranged conveyor channel 14 set.

Because the connection of the pump head 25 to the pumping station 11 is not pressure-free, it is necessary here that in the area of the transition to the connecting flange 3 on the connection piece 16 of the pumping station 11 provided sealing means by means of appropriate bias, in particular by spring action, be permanently pressed while maintaining the sealing effect, so that neither atmospheric pressure in the container 1 Still urea from the container 1 can exude.

As shown in 4 can in a conventional manner to the sampling neck 32 a fuel nozzle 34 by means of a corresponding pressure hose 35 be connected. Usually is between the fuel nozzle 34 and the withdrawal nozzle 32 a flow meter for detecting the out of the container 1 intervened fluid removed.

The above is thus a container 1 with integrated pumping station 11 described, which is designed as a completely closed unit and on site by connecting the pump head 25 and optionally a fuel nozzle 34 for refueling of vehicles or other vessels with the liquid received in the container can be provided.

The solution described above is ideally for refueling of commercial vehicles in the im container absorbed uric acid suitable for implementing SCR technology.

It is felt to be particularly advantageous that in the container 1 recorded pumping station 11 in no way affects the stackability of the container and thus its transport. Another technology-supporting advantage is that containers 1 and pumping station 11 form a closed unit, in particular at the time of connection of the pump head 25 always closed. The unit can be sealed from the factory for control purposes. This will avoid that in the container 1 absorbed liquid is exposed to the ambient air or in the container 1 up taken out liquid can escape.

Usually, therefore, the required for the implementation of SCR technology refueling stations can be realized simply by the fact that the pump head 25 and the dispenser and only the containers in question with integrated pump foot 11 be supplied with the required uric acid, the emptied containers are picked up on this occasion again.

Usually the forwarder will hold several containers and as soon as possible he can foresee that the last container in operation emptied is filled accordingly Demand container.

1

container

2

container

3

steel grating

4

opening

5

bunghole

6

deepening

7

upper container

10

eversion

11

pumping station

12

pumps lance

13

rotor shaft

14

delivery channel

15

pump rotor

16

Spigots

20

the top edge of the container

21

shutter

22

sealing body

25

pump head

30

flange

31

drive motor

32

Nut

33

Tapping sockets

34

gas pump nozzle

35

pressure hose

Claims (11)

Container system with a container ( 1 ) integrated pumping station ( 11 ) a container pump, in particular a drum or container pump, the one through a bunghole ( 5 ) in the container ( 1 ) insertable pump lance ( 12 ), through which one with a drive motor ( 31 ) in operative connection rotor shaft ( 13 ) with a rotatably received on this pump rotor ( 15 ), whereby the pump rotor ( 15 ) at the from the drive side of the rotor shaft ( 13 ) far end, therefore, when properly arranged in the bottom area, the container ( 1 ) and one of the pumping station ( 11 ) separable pump head ( 25 ) with integrated drive motor ( 31 ), characterized in that the from the pump head ( 25 ) separated pumping station ( 11 ) in the bunghole ( 5 ) of the container ( 1 ) is introduced, that the container ( 1 ) with the inserted pumping station ( 11 ) forms a sealingly sealed unit and the pump head ( 25 ) a connection flange ( 30 ) for positive and positive connection of the pump head ( 25 ) to the pumping station ( 11 ), wherein a withdrawal nozzle ( 33 ) for connecting a pressure hose ( 35 ) for emptying the container ( 1 ) in the connection flange ( 30 ) is integrated. Container system according to claim 1, characterized in that the drive motor ( 31 ) of the pump head ( 25 ) via the connecting flange ( 30 ), preferably by means of a bayonet closure, in such a way to the pumping station ( 11 ) is connectable, that the drive motor frictionally against the rotor shaft ( 13 ) and simultaneously in the connection flange ( 30 ) integrated sampling connection ( 33 ) with one in the pump lance ( 12 ) arranged conveying channel ( 14 ) is in sealingly sealed flow connection. Container system according to claim 2, characterized in that the drive motor ( 31 ) substantially in imaginary extension of the rotor shaft ( 13 ) of the pumping station ( 11 ) is coupled and the sampling neck ( 33 ) diagonally, preferably at an angle of about 135 degrees, from the longitudinal axis of the pump lance (in 12 ) arranged conveying channel ( 14 ) forterstreckt. Container system according to one of the preceding claims, characterized in that the pumping station ( 11 ) in the bunghole ( 5 ) of the container ( 1 ) by means of a suitable sealing body ( 22 ), preferably an O-ring seal, sealingly received, wherein the bunghole ( 5 ) with respect to the remaining container wall ( 2 ), preferably with respect to the intended installation of the container ( 1 ) upper container wall ( 7 ), is so deep-drawn that the connecting piece ( 16 ) of the container ( 1 ) integrated pumping station ( 11 ) for the pump head ( 25 ), preferably upper, container wall ( 7 ) is not exceeded. Container system according to one of the preceding claims, characterized in that the wall of the container ( 1 ) is formed double-walled, and the respective outer container wall opposite the inner container wall for forming the upper container wall ( 7 ) is raised so that the in the inner container wall embedded bunghole ( 5 ) is lowered so that the connecting piece ( 16 ) of the container ( 1 ) integrated pumping station ( 11 ) the upper container wall ( 7 ) is not exceeded. Container system according to claim 5 or 6, as characterized in that when intended to the pumping station ( 11 ) mounted pump head ( 25 ) the sampling nozzle ( 33 ) of the pump head ( 25 ), preferably upper, container wall ( 7 ) is not exceeded. Container system according to one of the preceding claims, characterized in that the drive motor ( 31 ) separable with the withdrawal nozzle ( 33 ) connecting flange ( 30 ) connected is. Container system according to one of the preceding claims, characterized in that it is in the drive motor ( 31 ) is a universal motor. Container system according to one of claims 2 to 8, characterized in that simultaneously with the connection of the pumping station ( 11 ) to the pump head ( 25 ), preferably by the end of the bayonet closure of the connecting flange ( 30 ), the conveying channel ( 14 ) in the direction of the drive motor ( 31 ) final seal is automatically opened. Container system according to one of the preceding claims, characterized in that the withdrawal nozzle ( 33 ) for connecting the pressure hose ( 35 ) is provided with a return safety device, preferably with a check valve. Container system according to one of the preceding claims, characterized in that the container ( 1 ) with integrated pumping station ( 11 ) by means of a seal against unauthorized removal of the container ( 1 ) is secured liquid.