Borehole

Abstract

A dispensing system (1) for a container (2) having a dip tube (5) and designed to hold a liquid (3), with a dispense head (4) which can be fastened to the dip tube (5). Via the dip tube (5) and the dispense head (4), the liquid (3) can be dispensed from the container (2) or liquid (3) can be supplied to the container (2). At least one ventilation opening (18) in the form of an elongated hole is provided in the dip tube (5).

Claims

1. A dispensing system of a container configured to hold a liquid, the dispensing system comprising: a dip tube; a dispense head fastened at the dip tube, so that the liquid is dispensable from the container through the dip tube and the liquid is supplyable to the container through the dip tube, wherein at least one ventilation opening configured as an elongated hole is present in the dip tube, wherein a head piece is provided at a top end of the dip tube and mounted in a container opening in a bung head of the container, wherein the dip tube runs in a vertical direction, and wherein at least one ventilation opening is arranged in the dip tube directly adjacent to the head piece and permanently connected to ambient when the liquid is dispensed from the container through the dip tube and when the liquid is supplied to the container through the dip tube.

2. The dispensing system according to claim 1, wherein the at least one ventilation opening includes two elongated holes disposed opposite one another in the dip tube.

3. The dispensing system according to claim 2, wherein the two elongated holes are configured identical.

4. The dispensing system according to claim 1, wherein longitudinal axes of the elongated holes run transversal to a longitudinal axis of the dip tube.

5. The dispensing system (1) according to claim 4, wherein the longitudinal axes of the elongated holes run perpendicular to the longitudinal axis of the dip tube.

6. The dispensing system according to claim 1, characterized in that the dip tube is made from plastic.

7. The dispensing system according to claim 6, wherein the dip tube is an injection-molded plastic part.

8. The dispensing system according to claim 1, wherein the dispense head has a tubular segment on its bottom end, wherein the tubular segment extends into the dip tube when the dispense head is fastened to the dip tube, wherein walls of the dip tube and of the tubular segment define a liquid channel.

9. The dispensing system according to claim 8, wherein the liquid channel leads into a liquid connection of the dispense head.

10. The dispensing system according to claim 8, wherein a circumferential seal is provided on an outside of the tubular segment running in its circumferential direction, wherein the circumferential seal is arranged closely below the at least one ventilation opening when the dispense head is fastened at the dip tube when the liquid is dispensed from the container through the dip tube.

11. The dispensing system according to claim 10, wherein the circumferential seal separates a gas channel from the liquid channel.

12. The dispensing system according to claim 1, wherein the at least one ventilation opening forms an outlet opening of a gas channel.

13. The dispensing system according to claim 12, wherein the gas channel runs inside the dispense head and leads into a ventilation connection of the dispense head.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) The invention is explained in the following with reference to the drawings. The drawings show:

(2) FIG. 1: Schematic depiction of the dispensing system according to the invention.

(3) FIG. 2: Depiction of the dispense head and the dip tube of the dispensing system according to FIG. 1.

(4) FIG. 3: Depiction of the dispense head of the dispensing system according to FIG. 1 fastened to the dip tube.

(5) FIG. 4: Sectional view of the dispense head of the dispensing system according to FIG. 1.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

(6) FIG. 1 shows schematically an exemplary embodiment of the dispensing system 1 according to the invention for transportable containers 2, which in particular can be barrels or similar. A liquid 3 is stored in the respective container 2. Liquids 3 stored in such containers 2 are in particular liquid specialty chemicals.

(7) The dispensing system 1 comprises a dispense head 4, which can be fastened to a dip tube 5. The dip tube 5 is supported in a bung head 6, which is seated in a container opening of the container 2, and is thus firmly connected to the container 2. The longitudinal axis of the dip tube 5 runs in a vertical direction.

(8) The dispense head 4 is used for dispensing liquids 3 from the container 2. The dispense head 4 can also be used for filling containers 2. For this purpose, the dispense head 4 has a liquid connection 4a at its upper end. A line 7 that leads to a pump 8 is connected to this liquid connection 4a. The line 7 can be constituted in the form of a hose. The pump 8 is controlled by a control unit (not shown).

(9) FIG. 2 shows the dispense head 4 at a distance from the dip tube of the dispensing system 1 according to FIG. 1. FIG. 3 shows the dispense head 4 fastened to the dip tube. FIG. 4 shows a sectional view of the dispense head 4.

(10) The dispense head 4 has a base body 4b forming a housing, at the upper end of which the liquid connection 4a is provided. At the lower end thereof, a check valve is connected, which connects to the top of a tubular segment 10 that opens out on the bottom of the base body 4b. The cavity of the tubular segment 10 forms a channel structure 11 as a component of a liquid channel for filling and draining the container 2.

(11) A ventilation channel 12 in the base body 4b of the dispense head 4 runs concentric to the channel structure 11 as a component of a gas channel for ventilating the container 2 and for ensuring a pressure equalization between the pressure in the container 2 and the ambient pressure of the environment. The gas channel opens out at a ventilation connection 13.

(12) A flange 14 is located on the outside of the gas channel for fastening the dispense head 4 to the dip tube 5.

(13) Opening out on the lower edge of the tubular segment 10, there are depressions 15 running in its longitudinal direction. A seal that runs around in the circumferential direction of the tubular segment is provided above these depressions 15.

(14) The dip tube 5 is made of plastic and is advantageously constituted as an injection-molded plastic part.

(15) The dip tube 5 essentially consists of a hollow-cylindrical tube body, the inner wall of which is a component of the liquid channel. A head piece 5a is present on the top of the dip tube 5, which head piece 5a is preferably constituted as a single piece with the tube body. The head piece 5a has an outer thread 17 for fastening in the container opening of the container 2.

(16) According to the invention, there are two identically constituted ventilation openings 18 disposed opposite one another in the dip tube 5.

(17) The ventilation openings 18 are constituted in the shape of elongated holes. The longitudinal axes of the elongated holes run perpendicular to the longitudinal axis of the dip tube 5. Since the longitudinal axis of the dip tube 5 runs in a vertical direction, the longitudinal axes of the elongated holes run in a horizontal direction. The extension of each elongated hole in its longitudinal direction is significantly larger, advantageously at least 2 to 3 times larger, than the extension of the elongated hole in a vertical direction.

(18) The ventilation openings 18 are located closely beneath the head piece 5a of the dip tube 5, i.e., the ventilation openings 18 are located in the opening-out region where the dip tube 5 opens out at the head piece 5a.

(19) FIG. 3 shows the dispense head 4 fastened to the dip tube 5. The ventilation openings 18 then lie closely above the seal 16. The ventilation openings 18 lie in the intermediate space between the head piece 5a and the seal 16. The heights, i.e., extensions, of the ventilation openings 18 in the longitudinal direction of the dip tube 5 are adapted to the free part of the intermediate space present there. Since the ventilation openings 18 are constituted as elongated holes and their extensions transverse to the longitudinal axis are larger than in the longitudinal direction of the dip tube 5, both elongated holes have cross-sections optimally sized to allow a largest-possible throughput of gas, in particular air, in the container 2. The extensions of the elongated holes transverse to the longitudinal axis of the dip tube 5 are significantly smaller than the circumference of the dip tube 5. There is thus sufficient wall material of the dip tube 5 present between the elongated holes such that its stability is not impaired by the elongated holes.

(20) Toward the interior space of the container, the ventilation openings 18 delineate the gas channel, which leads to the gas channel via the ventilation channel 12. Due to the maximized cross-sections of the ventilation openings 18, an efficient pressure equalization between the pressure in the container 2 and the ambient pressure of the environment is enabled via the gas channel. The flow direction of the gas is marked in FIG. 3 with the arrows I.

(21) In FIG. 3, the arrows II further depict the liquid flow when draining liquid 3 via the liquid channel. Liquid 3 in the container 2 flows into the dip tube 5 via its open bottom, and is guided via the channel structure 11 of the dispense head 4 to the liquid connection and poured out there.

(22) The gas flow in the gas channel is separated from the liquid flow in the liquid channel by means of the seal 16.

LIST OF REFERENCE NUMERALS

(23) (1) dispensing system (2) container (3) liquid (4) dispense head (4a) liquid connection (4b) base body (5) dip tube (5a) head piece (6) bung head (7) line (8) pump (9) check valve (10) tubular segment (11) channel structure (12) ventilation channel (13) ventilation connection (14) flange (15) depression (16) seal (17) outer thread (18) ventilation opening