extraction system

Abstract

The invention relates to a dispensing system (1) for a container (2) having a dip tube (5) and designed to hold a stored product. The dispensing system (1) further comprises a dispensing head (4) which can be attached to the dip tube (5), such that liquid (3) can be dispensed from the container (2) via the dip tube (5) and the dispensing head (4), or liquid (3) can be supplied to the container (2). The dip tube (5) has a connection with a multi-start thread.

Description

[0001] The invention relates to a removal system according to the preamble of claim 1.

[0002] Such a withdrawal system is known from DE 102021 116 140. This withdrawal system is used for filling and emptying containers, in particular drums, filled with liquid chemicals. The withdrawal system comprises a withdrawal head that can be attached to a dip tube of a container. Using the withdrawal head, liquid can be withdrawn from the container via the dip tube or liquid can be supplied to the container.

[0003] The extraction head can be attached to the immersion tube using a screw connection. The immersion tube has a thread to create this screw connection. The extraction head has a corresponding mating thread.

[0004] The production of the screw connection is relatively complicated and time-consuming, since the counter thread must be turned relative to the thread over several turns, typically three to four turns, in order for the screw connection to be stable.

[0005] A further disadvantage is that the thread of the immersion tube and the mating thread of the extraction head can easily become jammed. This not only complicates the creation of the screw connection, but also poses a significant risk of damage to the thread and mating thread. The risk of damage is particularly high when the immersion tube and its thread, and the extraction head and its mating thread, are made of plastic.

[0006] The invention is based on the object of providing a connection means with high functionality and functional reliability for an immersion pipe of the type mentioned at the beginning.

[0007] To achieve this object, the features of the independent claims are provided. Advantageous embodiments and expedient developments of the invention are described in the dependent claims.

[0008] The invention relates to a removal system for a container having a dip tube and designed to receive a stored product. The removal system further comprises a removal head that can be attached to the dip tube, allowing liquid to be removed from the container via the dip tube and the removal head, or liquid to be supplied to the container. The dip tube has a connecting means with a multi-start thread.

[0009] The invention further relates to a dip tube designed for storage in a container. The dip tube has a connecting means with a multi-start thread.

[0010] According to the invention, a dip tube is provided that extends into the interior of a container, so that a stored material, in particular a liquid, can be removed from the container or supplied to it via the dip tube. For this purpose, the dip tube is advantageously mounted in a container opening of the container, so that the dip tube protrudes into the interior of the container.

[0011] According to the invention, the immersion tube has a multi-start thread as a connecting means. With this multi-start thread and a corresponding multi-start thread, i.e., a multi-start counter-thread, of another unit, a screw connection can be formed quickly and reliably.

[0012] A significant advantage of the multi-start thread according to the invention is that a secure and stable screw connection can be produced with just a few turns, preferably only one turn of the multi-start counter-thread relative to the multi-start thread.

[0013] A further significant advantage of the multi-start thread according to the invention is that, when screwing the multi-start thread onto the multi-start mating thread, the risk of jamming is significantly reduced compared to conventional single-start threads. Such jamming not only delays the creation of the screw connection, since the thread must be reattached to the mating thread after jamming. Rather, such jamming poses the risk of damaging the thread and / or the mating thread, making it impossible to establish a screw connection. This risk is particularly present when the connecting elements with the multi-start thread and the multi-start mating thread are made of plastic.

[0014] According to the invention, the dip tube with the associated container is part of a withdrawal system. The withdrawal system can comprise several containers, each of which contains a dip tube.

[0015] The withdrawal system comprises a withdrawal head that can be connected to the dip tube of a container to withdraw a stored material, in particular a liquid, from the container or to add it to it. The liquids can, in particular, be liquid chemicals.

[0016] The fastening of the extraction head to the respective immersion tube is carried out by forming a screw connection, whereby the multi-start thread of the immersion tube is screwed to a corresponding multi-start thread, i.e. multi-start counter-thread, on the extraction head.

[0017] After the withdrawal or filling process, the withdrawal head is removed from the dip tube. The dip tube, and thus the container, can then be sealed with a dip tube closure. The dip tube closure also has a multi-start thread corresponding to the multi-start thread of the dip tube, i.e., a multi-start counter-thread, allowing the dip tube closure to be screwed tightly onto the dip tube.

[0018] According to an advantageous embodiment, the multi-start thread of the or each immersion tube is designed as an internal thread. Correspondingly, the multi-start threads of the extraction head and the immersion tube closure are designed as external threads.

[0019] According to an advantageous embodiment, the connecting means of the immersion tubes and preferably the entire immersion tube are made of plastic.

[0020] Furthermore, the connection means of the extraction head and also the connection means of the immersion tube closure are made of plastic, whereby the extraction head and the immersion tube closure can also be made of plastic in their entirety.

[0021] The aforementioned parts can then be manufactured efficiently and cost-effectively as plastic injection-molded parts.

[0022] Since the connecting elements are made of plastic, the multi-start threads are also made of plastic. However, this is not critical, as the multi-start thread design prevents jamming during the screw connection, and therefore there is no risk of damage to the multi-start threads.

[0023] The containers equipped with the dip tube can be designed in different shapes and sizes. In particular, the containers can be in the form of bottles or barrels.

[0024] Since the screw connections with the multi-start thread can be made and released quickly and without the risk of jamming, robots can be used particularly well for the automated production and release of the screw connections, which results in a considerable rationalization effect in the handling of the containers.

[0025] According to an advantageous embodiment, an RFID chip, i.e., a transponder, is integrated into each immersion tube. This transponder stores identification data for the container and / or the goods stored in the container.

[0026] This data can be read by an RFID reader unit on the removal head when the removal head is connected to the container's dip tube. This prevents container mix-ups and the resulting incorrect removal of stored goods from or incorrect addition of stored goods to the container. Furthermore, this ensures container traceability, especially when the read data is fed into a central, preferably cloud-based, computer system.

[0027] The invention is explained below with reference to the drawings. They show: Fig. 1: Schematic representation of the sampling system according to the invention. Fig. 2: Partial representation of the extraction system according to Fig. 1 with a container having a dip tube and a withdrawal head. Fig. 3: Enlarged partial view of the arrangement according to Fig. 2. Fig. 4: Detail of a section of the extraction head of the extraction system according to Fig. 1.

[0028] Fig. Figure 1 schematically shows an embodiment of the inventive removal system 1 for transportable containers 2, which can be formed in particular by barrels, bottles, or the like. A liquid 3 is stored in the respective container 2 as the stored product. The liquids 3 stored in such containers 2 are, in particular, liquid specialty chemicals.

[0029] The extraction system 1 comprises an extraction head 4 that can be attached to a dip tube 5. The dip tube 5 is mounted in a container opening 6 of the container 2 and is thus firmly connected to the container 2. The longitudinal axis of the dip tube 5, which extends into the interior of the container 2, runs vertically.

[0030] The extraction head 4 serves to extract liquid 3 from the container 2. It can also be used to fill containers 2. For this purpose, the extraction head 4 has a liquid connection 4a at its upper end. A line 7 leading to a pump 8 is connected to this liquid connection 4a. The line 7 can be designed in the form of a hose. The pump 8 is controlled by a control unit (not shown).

[0031] The Fig. 2 and Fig. 3 shows the removal head with the associated container 2. Fig. 4 shows a detailed view of a section of the removal head 4.

[0032] The immersion tube 5 has a hollow cylindrical tube body 9 and a head part 10 on the top side of the tube body 9 ( Fig. 2 and Fig. 3). The head part 10 is mounted at the container opening on the top of the container 2 such that the tube body 9 protrudes into the container 2. The immersion tube 5 is made of plastic.

[0033] As can be seen from the Fig. 2 and Fig. 3, the head part 10 has an opening with a circular cross-section which opens out at the top of the head part 10.

[0034] An internal thread 11 is provided on the inner wall bordering the opening as a connection element. The connection element with the internal thread 11, like the rest of the immersion tube 5, is made of plastic.

[0035] According to the invention, the internal thread 11 forming the connecting means is designed as a multi-start thread, ie it has several cuts, two of these cuts being marked with arrows I, II.

[0036] The removal head 4 has, as can be seen in particular from the Fig. 2 and Fig.4, a base body 4b, at the upper end of which the fluid connection 4a is provided. A fluid channel (not shown) leads from the fluid connection 4a inside the base body 4b, to which a tubular extension 12 opens at the lower end of the base body 4b is connected. A ventilation connection 13 opens laterally on the base body 4b. The dispensing head 4 is made of plastic.

[0037] Above the tubular extension 12, at the lower edge of the base body 4b, a connection element in the form of an external thread 14 is formed. The external thread 14 is complementary to the internal thread 11 of the immersion tube 5. This connection element with the external thread 14 is also made of plastic.

[0038] The external thread 14 is also designed as a multi-start thread, ie it has several cutouts, two of which are marked with arrows III, IV.

[0039] To mount the extraction head 4 on the immersion tube 5, the tubular extension 12 of the extraction head 4 is inserted into the immersion tube 5. Then, the external thread 14 of the extraction head 4 is screwed onto the internal thread 11 of the immersion tube 5, forming a screw connection with which the extraction head 4 is attached to the immersion tube 5.

[0040] Since the external thread 14 and internal thread 11 are designed as multi-start threads, a few turns, preferably just one turn of the external thread 14 on the internal thread 11, are sufficient to form a tight and stable screw connection. By designing the connecting elements as multi-start threads, jamming of the external thread 14 on the internal thread 11 is prevented.

[0041] The production and release of the screw connection can advantageously be carried out automatically using a robot.

[0042] Once the extraction head 4 is secured to the immersion tube 5 by establishing the screw connection, liquid 3 can be extracted from the container 2 by using the pump 8 to convey liquid 3 from the container 2 via the immersion tube 5, the tubular extension 12, and the liquid channel of the extraction head 4, and then via the liquid connection 4a out of the extraction head 4. The container 2 is filled in a corresponding manner.

[0043] An RFID chip, i.e., a transponder (not shown in the figures), can be integrated into the head section 10 of the immersion tube 5. The RFID chip stores data that can be used to identify the container 2 and the liquid 3 stored therein. An RFID reader (also not shown) is integrated into the extraction head 4, which can be used to read the data from the RFID chip when the extraction head 4 is attached to the immersion tube 5 and the RFID chip is thus within the reading range of the RFID reader.

[0044] Once a removal or filling process of the container 2 is completed, the screw connection between the removal head 4 and the immersion tube 5 is loosened, and the removal head 4 is removed from the immersion tube 5. These steps can again be performed by a robot.

[0045] A dip tube closure (not shown) is then placed on the head part 10 of the dip tube 5 and fastened there.

[0046] The immersion tube closure, which is advantageously made of plastic, has an external thread 14 in the form of a multi-start thread, which is identical to the external thread 14 of the withdrawal head 4.

[0047] Thus, the immersion tube closure can be screwed in the same way as the extraction head 4 with its external thread 14 to the internal thread 11 of the immersion tube 5, advantageously again by means of a robot. List of reference symbols 1 withdrawal system 2 containers 3 Liquid 4 removal head 4a Liquid connection 4b Basic body 5 Immersion tube 6 Line 7 Line 8 Pump 9 Pipe body 10 headboard 11 internal thread 12 Approach 13 Ventilation connection 14 external threads QUOTES CONTAINED IN THE DESCRIPTION

[0000] This list of documents submitted by the applicant was generated automatically and is included solely for the convenience of the reader. This list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions. Cited patent literature

[0000] DE 102021 116 140

[0002]

Claims

[1] Removal system (1) for a container (2) having a dip tube (5) which is designed to receive a stored product, with a removal head (4) which can be fastened to the dip tube (5) so that liquid (3) can be removed from the container (2) via the dip tube (5) and the removal head (4) or liquid (3) can be supplied to the container (2), characterized by that the immersion tube (5) has a connecting means with a multi-start thread. [2] Withdrawal system (1) according to claim 1, characterized by that the multi-start thread of the immersion tube (5) is part of a screw connection by means of which the extraction head (4) can be fastened to the immersion tube (5). [3] Withdrawal system (1) according to claim 2, characterized by that the extraction head (4) has a connecting means with a multi-start thread corresponding to the multi-start thread of the immersion tube (5). [4] Withdrawal system (1) according to claim 3, characterized bythat the multi-start thread of the immersion tube (5) is an internal thread (11) and the multi-start thread of the extraction head (4) is an external thread (14). [5] Removal system (1) according to one of claims 1 to 4, characterized by that the connecting means of the immersion tube (5) and the extraction head (4) are made of plastic. [6] Withdrawal system (1) according to claim 5, characterized by that the immersion tube (5) is made of plastic. [7] Withdrawal system (1) according to one of claims 5 or 6, characterized by that the removal head (4) consists of plastic parts. [8] Removal system (1) according to one of claims 1 to 7, characterized by that the immersion tube (5) is mounted on a container opening of the container (2) and projects into the interior of the container (2). [9] Removal system (1) according to one of claims 1 to 8, characterized by that the container (2) is formed by a bottle or a barrel. [10] Removal system (1) according to one of claims 1 to 9, characterized by that an RFID chip is integrated in the immersion tube (5), in which identification data of the container (2) and / or the stored goods in the container (2) are stored. [11] Removal system (1) according to one of claims 1 to 10, characterized by that the removal head (4) can be attached to the immersion tube (5) by means of a robot. [12] Immersion tube (5) which is designed for storage in a container (2) characterized by that it has a connecting element with a multi-start thread.

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