DE9408920U1 - Dosing device for liquids - Google Patents

Description

My file: F 50/6

Dosing device for liquids

The invention relates to a dosing device for liquids of various types, such as paints, varnishes, dispersions, perfumes, or the like, with a dosing head with a large number of dosing valves with connected pipes for supplying liquid and a weighing vehicle with two scales for containers of different sizes, which can be moved from an end position receiving the container or containers into a filling position located under the dosing head and carries the two scales in a height-adjustable manner relative to the dosing head into the filling position.

Such dosing devices have become known in practice in various designs and are mostly designed as open, shelf-like systems in which the dosing heads and the weighing vehicle are exposed.

For the two scales arranged on the weighing vehicle, which can be moved together and adjusted in height, provisions in the form of pits or depressions are required in the floor on which the dosing device is mounted, into which the two scales must be lowered for loading and unloading the containers due to the design.

Due to the open design of the dosing device and the pits or depressions in the floor surface, there is a certain risk of accidents and damage to the environment cannot be ruled out.

In addition, these known dosing devices require complicated on-site assembly, which has a cost-effective effect.

The object of the invention is to improve a dosing device constructed according to the type mentioned at the beginning in such a way that it can be freely set up as a prefabricated unit at different locations without the need for pits or depressions in the installation floor, can be connected to the pipelines quickly and easily and ensures an environmentally friendly, emission-free and accident-proof operation.

This object is achieved according to the invention by the characterizing features of claim 1.

The subsequent subclaims contain design features which represent advantageous and beneficial further developments in the solution of the task.

The dosing device according to the invention is designed as a mobile, prefabricated unit and represents a system that can be set up at different locations without any provisions in the installation floor, i.e. without creating pits or depressions, which can then be connected to the pipes of the liquid tanks in a simple and quick manner.

The dosing device has a housing that is closed on all sides except for a door or flap, in which the dosing head with

a large number of dosing valves and the weighing vehicle with the two weighing scales is housed in a mobile manner.

This housing has a base pan that takes up the entire basic shape of the housing and with which the device is placed on the installation floor so that any liquids that may run next to the container can be caught in this base pan and thus no contamination occurs at the installation site or harmful effects on the health of the operator.

The weighing vehicle with its two scales is designed to accommodate containers of different sizes and the larger scale for the large containers can be lowered into the bottom pan for loading and unloading the container, so that the large containers can be easily brought over the edge of the pan onto the platform of the large scale using a flat, adjustable ramp.

The dosing device can only be operated when the door is closed, which provides protection against accidents and also protects the weighing processors against interference, for example from air movements, which allows the device to work optimally.

Electronic weight recording and dosing control results in precise positioning of the respective container under the dosing head and a precise dosing and mixing process.

The number of metering valves in the housing can be varied as desired and the distributor plate that holds the metering valves with the supply lines allows the pipes to be easily connected to the outside of the housing.

Furthermore, the length of the dosing device housing can be selected according to the number of dosing valves or the requirements.

The entire device is simple and cost-effective, can be completely manufactured in the factory and can be easily installed on site and connected to the pipes.

An embodiment of the invention is explained in more detail below with reference to the drawings. It shows:

Fig.l a perspective view of a dosing device designed as a fully enclosed unit,

Fig. 2 a front view of the dosing device without front wall and door, with weighing vehicle and scales with containers raised in dash-dotted lines,

Fig. 3 a plan view of the dosing device without cover wall,

Fig. 4 a side view of the dosing device without side wall with lowered scales and scales raised in dash-dotted lines.

The dosing device for liquids is designed as a structural unit that is closed on all sides and can be set up on a floor surface (1) without a pit or depression.

The dosing device has an elongated housing (3) which is closed on all sides except for a door (2) - sliding door, swing door, or similar - or flap as a container loading and removal access, with a base pan (4) which can be placed on the flat base surface (1); the base pan (4) extends over the entire base surface of the housing (3) and has a flat base wall (4a) and a raised edge of the pan (4b) all around.

The housing (3) consists of a frame (24) connected to the base pan (4) with cladding walls (top wall (3a), front wall (3b), side walls (3c) and rear wall (3d)) and the door (2). The front wall (3b)

has a sloping wall area (3e) in which the viewing window (25) and operating elements (26) are arranged.

The housing (3) of the dosing device accommodates a dosing head (5) with a plurality of dosing valves (6) with connected supply lines (9) for liquid supply and a weighing vehicle (12) with two scales (7, 8) for containers of different sizes (10, 11); the weighing vehicle (12) can be moved from an end position receiving the container or containers (10, 11) into a filling position located under the dosing head (5) and carries the two scales (7, 8) in a height-adjustable manner relative to the dosing head (5) into the filling position.

The weighing vehicle (12) has a chassis (13) which can be moved back and forth over the entire length of the housing by means of a drive (16) using rollers (14) on rails (15) fixed to the base pan (4). The drive (16) is formed, for example, by an electric gear motor and a belt drive (chain drive (16a)).

Both scales (7, 8) are mounted on a U-shaped lifting table (19) whose height can be adjusted relative to the chassis (13) by means of a pressure cylinder (17) and scissor linkage (18).

The large scale (8) for large containers (11) can be lowered with its platform (8a) into the base pan (4) for loading and unloading containers.

To insert and remove the large containers (11), most of which are equipped with rollers, only the raised edge of the tub (4b), which is approx. 3 cm, has to be bridged, which is easily possible using a flat, adjustable ramp.

The small scale (7) for small containers (10) is mounted on the lifting table (19) at a height above the platform (8a) of the large scale (8) and is equipped with a roller table (20) for loading and unloading the smaller container (10) onto its platform (7a).

Both scales (7, 8) are arranged one behind the other in the direction of travel of the weighing vehicle (12) and thus next to each other for loading and unloading from the front of the housing (3).

The platform (8a) of the large scale (8) is assigned three weighing points (21) on the lifting table (19) and the small scale (7) has its own weighing processor.

The metering valves (6) are fixed with the supply pipes (9) in the housing (3) to a valve plate (22) fastened to the housing cover wall (3a), to which the pipes (23) coming from the storage containers (tanks) containing the liquids can be connected.

The small scale (7) is preferably mounted on the lifting table (19) transversely to the direction of travel of the weighing vehicle (12) so that it can be moved to a limited extent, so that the small containers (10) can be optimally aligned with the individual dosing valves (6).

Claims (11)

Protection claims 1. Dosing device for liquids, with a dosing head with a plurality of dosing valves with connected pipes for liquid supply and a weighing vehicle with two scales for containers of different sizes, which can be moved from an end position receiving the container or containers into a filling position located under the dosing head and carries the two scales in a height-adjustable manner relative to the dosing head into the filling position, characterized in that it is designed as a structural unit which is closed on all sides and can be set up on a floor surface (1) without a pit or depression. 2. Dosing device according to claim 1, characterized in that it has an elongated housing (3) which is closed on all sides except for a door (2) or flap as a container loading and removal access and has a base pan (4) which can be placed on the flat base surface (1). 3. Dosing device according to claim 1 or 2, characterized in that the base pan (4) extends over the entire base area of the housing (3) and has a flat base wall (4a) and a peripherally raised pan edge (4b). 4. Dosing device according to one of claims 1 to 3, characterized in that the weighing vehicle (12) is provided with a carriage frame (13) with rollers (14) on the floor pan (4) fixed rails (15) can be moved back and forth over the entire length of the housing by means of a drive (16). 5. Dosing device according to one of claims 1 to 4, characterized in that both scales (7, 8) are connected to a · U-shaped lifting table (19) which is height-adjustable relative to the chassis (12) by means of a pressure cylinder (17) and scissor linkage (18). 6. Dosing device according to one of claims 1 to 5, characterized in that the large scale (8) for large containers (11) can be lowered with its platform (8a) into the base pan (4) for loading and unloading containers. 7. Dosing device according to one of claims 1 to 6, characterized in that the small scale (7) for small containers (10) is mounted on the lifting table (19) at a height above the platform (8a) of the large scale (8) and has a roller table (20) for loading and removing the smaller container (10) onto its platform (7a). 8. Dosing device according to one of claims 1 to 7, characterized in that both scales (7, 8) are arranged one behind the other in the direction of travel of the weighing vehicle (12). 9. Dosing device according to one of claims 1 to 8, characterized in that the platform (8a) of the large scale (8) on the lifting table (19) is assigned three weighing points (21). 10. Dosing device according to one of claims 1 to 9, characterized in that the small scale (7) is mounted on the lifting table (19) so that it can be moved to a limited extent transversely to the direction of travel of the weighing vehicle (12). 11. Dosing device according to one of claims 1 to 10, characterized in that the dosing valves (6) with their feed pipes (9) are fixed in the housing (3) to a valve plate (22) fastened to the housing cover wall (3a), to which pipes (23) coming from liquid storage containers (tanks) can be connected.